WO2004101185A1

WO2004101185A1 - Method and device for treating waste bread

Info

Publication number: WO2004101185A1
Application number: PCT/JP2004/006457
Authority: WO
Inventors: Yoshihiro Nagashima; Masaaki Ohyama; Masashi Ibata; Masahiro Sugano
Original assignee: Nippon Zoki Pharmaceutical Co., Ltd.
Priority date: 2003-05-16
Filing date: 2004-05-13
Publication date: 2004-11-25
Also published as: CN1787886A; KR20060005392A; JPWO2004101185A1

Abstract

[PROBLEMS] To provide a method and a device capable of efficiently crushing and drying a waste bread into fine powder and granular material with low moisture content so that the waste bread can be used as a mixed feed for livestock. [MEANS FOR SOLVING PROBLEMS] The waste bread (A) is fed into a primary drying passage (1) having, therein, rotary crushing vanes (2b) and a hot air injection nozzle (3a) having an injection port facing a delivery direction and crushed by grinding down the waste bread (A) by the tip faces of the rotary crushing vanes (2b) and the inner bottom face of the primary drying passage (1), and water content in the waste bread (A) is evaporated and removed by the heated primary drying passage (1) and hot air from the injection nozzle (3a). In addition, the waste bread (A) is supplied into a secondary drying passage (4) through a net-like body (7a) while more finely crushing the bread by a rotary cutter (20) and further dried in the secondary drying passage (4).

Description

Specification

Waste bread processing method and processing apparatus

Technical field

[0001] The present invention is intended to pulverize and dry bread discarded, such as bread that is unsold and sold at stores and bread crumbs that are generated during cooking or left behind by eating, in addition to bread caused by manufacturing loss generated in the manufacturing process. In addition, the present invention relates to a method and an apparatus for treating waste bread in the form of granules that can be used for livestock feed and the like.

^ Scenic technology

[0002] In recent years, with the development of the food service industry, the amount of food waste discharged from companies has been constantly increasing, and in order to control this increase in food waste and protect the global environment, Strength The Food Recycling Law has been enacted and mandated to increase the recycling rate to at least 20%.

[0003] The consumption of bread has been increasing year by year due to the change in Japanese dietary habits. With this, in addition to the leftover bread crumbs provided by the restaurant industry, convenience stores and other stores have The amount of bread waste generated when manufacturing products using bread such as bread and sandwiches that are discarded due to unsold products is increasing year by year, and disposal of these waste bread and bread waste becomes a problem. ing.

[0004] Therefore, a system has been proposed in which garbage before and after cooking from home is crushed and processed into sludge-like feed or fertilizer. According to this system, garbage is crushed into a viscous sludge. After adding a flocculant to this sludge, a garbage recycling system has been proposed, in which the garbage is fed into a high-pressure filter press by a high-pressure pump to produce a finely ground viscous feed (for example, see Patent Document 1). ).

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2001-352959 (Claims)

Disclosure of the invention

Problems the invention is trying to solve

[0006] However, even though the above system can treat waste bread and bread crumbs together with other garbage leaving the home, the above system treats only large quantities of waste bread and bread crumbs only. thing In addition, the processing steps are complicated, and it is not possible to effectively dispose of a large amount of waste bread and bread waste (hereinafter referred to as waste bread) as described above. A method for effectively disposing of waste pans has been desired.

[0007] The present invention has been made in view of such problems, and an object of the present invention is to efficiently pulverize and dry waste bread discharged from a convenience store or a food manufacturing plant. Another object of the present invention is to provide a method and an apparatus for treating waste bread, which can process bread into a powdery body so that the bread can be used by being mixed with livestock feed or the like. Means for solving the problem

[0008] In the method for treating waste bread according to claim 1, the waste bread is supplied into the primary drying passage, and the waste bread is crushed finely by crushing means provided in the primary drying passage, and the crushed bread is crushed. After reducing the water content of the granules, the powder is supplied into a secondary drying passage to further reduce the water content of the crushed bread granules.

[0009] The method for treating waste bread according to claim 2 is the method for treating waste bread according to claim 1, wherein the granular material of the bread discharged from the outlet of the primary drying passage is subjected to the secondary drying passage. It is characterized by further secondary crushing while being continuously fed into the inside.

[0010] As described in claim 3, the apparatus for carrying out the above-mentioned method for treating waste bread is provided with a horizontal cylinder provided with a waste hopper charging hopper and internally provided with crushing means and hot air injection means. The primary drying passage comprises a horizontal drying secondary drying passage for receiving the granular material of the bread to be carried out and performing secondary drying.

[0011] In the waste bread treating apparatus, the invention according to claim 4 relates to a preferable structure of the waste bread crushing means provided in the primary drying passage, and is rotatably provided in the primary drying passage. Crushing blades protrude from the outer periphery of the rotating shaft at intervals in the length direction, and the crushing blades are used to finely pulverize the waste pan.

[0012] Further, according to a fifth aspect of the present invention, in the waste bread processing apparatus according to the third or fourth aspect, the rotary shaft is formed hollow, and an outer peripheral surface of the hollow rotary shaft is Injection nozzles, which are directed in the discharge direction of the crushed bread powder and granules, are protruded at intervals in the length direction, and these injection nozzles are communicated with the hollow rotary shaft. And the hollow rotary shaft is communicated with a hot air supply pipe disposed outside the primary drying passage. It is characterized in that the hot air injection means is constituted.

[0013] The waste bread processing apparatus according to claim 6 is the waste bread processing apparatus according to any one of claims 3 to 5, wherein the waste bread is transported in the primary drying passage. A shielding plate for temporarily closing the passage is provided at the start end side so as to be freely openable and closable, and a passage between the shielding plate and the charging port of the charging hopper is formed in a retention chamber for waste pans supplied from the charging hopper. The stagnant waste pan is crushed by crushing blades protruding from one end of the hollow rotary shaft in the stagnant chamber.

[0014] The waste bread processing apparatus according to claim 7 is the waste bread processing apparatus according to any one of claims 3 to 6, wherein the outlet of the primary drying passage and the secondary drying path are connected to each other. A net-like body which is communicated with the entrance of the passage by a vertical cylindrical passage, and in which a number of small holes of a predetermined size are provided in the vertical passage to allow the passage of bread granules of a predetermined size. A rotating blade is provided on the upper surface of the mesh to finely grind the granules of bread conveyed into the vertical passage from the primary drying passage into smaller particles. Is a special feature.

[0015] Finally, the waste bread processing apparatus according to claim 8 is the waste bread processing apparatus according to any one of claims 3 to 7, wherein the waste bread processing apparatus has a central part in the secondary drying passage. A hollow rotating shaft is provided, and the inside of the secondary drying passage is heated by sending hot air from outside the secondary drying passage through a hot air supply pipe into the hollow rotating shaft. A plurality of agitating and conveying plates are provided on the outer peripheral surface of the agitating and conveying plate that sends out the powder and granules of the waste bread toward the outlet side of this secondary drying passage at intervals in the length direction.

[0016] With the above-described configuration, when the waste pan is thrown into one end of the primary drying passage through the loading hopper, the waste pan is crushed by a large number of crushes protruding from the hollow rotary shaft provided in the primary drying passage. It is crushed finely by the crushing means composed of the blades, and is heated in the primary drying passage, and the water contained in the waste pan becomes steam, and is discharged out of the primary drying passage together with a part of the heated air. When the waste bread is crushed by the crushing blade, the waste bread is extremely lightweight.If the waste bread is crushed or cut by the rotating force of the crushing blade, the waste bread must be rotated together with the crushing blade to break it. Becomes difficult. This Therefore, a blade is provided on the crushing blade to cut the bread, and the waste bread is crushed and crushed by the tip surface of the crushing blade and the inner surface of the primary drying passage.

[0017] Further, if the storage amount of the waste bread in the primary drying passage, that is, the storage density in the space in the passage is small, the waste bread is hardly crushed and treated, so that one end side in the primary drying passage, That is, a shielding plate for temporarily closing the passage is provided on the transport start end side of the waste pan, and by closing this shielding plate, the inside of the passage between the shielding plate and the input port of the input hopper is put into the input hopper. A large amount of waste bread is crushed by agitating by rotating the crushing blades while a large amount of waste bread is filled in the storage room once, and the waste bread is supplied to the waste chamber. The process and the crushing process using the tip surface of the crushing blade and the bottom surface of the passage are repeatedly performed.

[0018] After the crushing process of the waste bread in the retaining room has been performed for a predetermined time, when the shielding plate is opened, the bread pieces of the treated waste bread ゃ the large and small powders are placed in the primary drying passage 1 at the other end. Conveyed toward. On the outer peripheral surface of the hollow rotary shaft, there are provided injection nozzles, each of which is directed at an injection port in a direction in which the crushed bread pieces and the granular material are sent out, at appropriate intervals in the length direction. By blowing hot air, the lightly crushed bread flakes / granules that have already been crushed to some extent are conveyed so as to be blown off toward the other end discharge port in the primary drying passage. Further, by forming a surface of the crushing blade facing the discharge port side of the primary drying passage on a conveying inclined surface, the bread pieces of the waste bread and the powdery granules are formed according to the rotation of the crushing blade. The sloping surface of the crushing blade can be conveyed toward the discharge port side of the primary drying passage, and the pan is cut by the blade-shaped portion of the crushing blade during the conveyance. The waste bread is crushed by the bottom.

[0019] Furthermore, the bread pieces or the granules of the waste bread are heated by the heated air in the primary drying passage, and the moisture contained therein is evaporated into the primary drying passage to lower the water content. . In addition, the hot air blown out from the injection nozzle further heats the bread pieces and the granules of the waste bread, and the hot air flows through the fine gaps between the porous bread pieces and the granules. These bread pieces and powdered granules are also heated from the inside, so that the contained water is more effectively removed, and the drying process is efficiently performed in a short time to a predetermined moisture content. That can be S.

[0020] In this way, the crushed bread particles and the water content reduced in the primary drying passage and the moisture content thereof are transferred from the other end discharge port of the primary drying passage to the other end of the secondary drying passage through the vertical passage. Sent in. At this time, a mesh body having a large number of small holes of a predetermined size for passing bread granules of a predetermined size in the vertical passage is stretched, and a primary drying passage is provided on an upper surface of the mesh body. By providing a rotary blade to further finely grind the granular material of the bread carried into the vertical passage from the side, the bread pieces and the granular material sent into the vertical passage from the primary drying passage side are All are fed into the other end of the secondary drying passage in the form of powder having a uniform diameter suitable for mixing with other ingredients as feed.

[0021] A hollow rotary shaft is also provided in the secondary drying passage similarly to the primary drying passage. The powdery material of the waste bread is placed on the outer peripheral surface of the hollow rotary shaft at the outlet side of the secondary drying passage. A plurality of agitating and conveying plates are sent out toward the boiler at appropriate intervals in the longitudinal direction. It can be conveyed toward the outlet side at the conveyance speed, and the powder particles of the waste bread are heated by the heating wall surface of the secondary drying passage heated by the heater and the heated air in the secondary drying passage. The body can be subjected to a drying treatment so as to be a powder having a low water content, which can be stored for a long time until blended as a feed without adding a preservative additive or the like. In addition, the heating of the secondary drying passage prevents the powder and granules of the waste bread from adhering to the passage wall.

The invention's effect

[0022] As described above, according to the method for treating waste bread of the present invention, as described in claim 1, the crushing means for supplying waste bread into the primary drying passage and providing the waste bread in the primary drying passage. And further reducing the moisture content of the crushed bread powder and granules, and then supplying it to a secondary drying passage to further reduce the moisture content of the crushed bread powder and granules. Therefore, the waste bread supplied into the primary drying passage can be finely crushed by the crushing means, and at the same time, it can be heated in the primary drying passage to reduce the water content. A large amount of waste bread can be crushed and dried efficiently in a short period of time while continuously transporting and passing from the primary drying passage to the secondary drying passage. [0023] Further, according to the invention of claim 2, the secondary crushing is further performed while continuously feeding the powdery and granular material of the pan discharged from the outlet of the primary drying passage into the secondary drying passage. Because

Bread pieces mixed in waste bread that has been roughly crushed in the primary drying passage.-It is possible to reliably crush relatively large particles into fine particles that can be blended for feed. Stabilization can be achieved.

[0024] Further, according to the waste bread processing apparatus of the present invention, as described in claim 3, the horizontal cylinder provided with a waste pan input hopper and provided with crushing means and hot air injection means therein. The primary drying passage, and a horizontal cylindrical secondary drying passage for receiving and carrying out secondary drying of the discharged powdery material of the bread. Force A predetermined amount of waste pan can be easily supplied into the primary drying passage, and in the primary drying passage, the waste bread is effectively dried by the hot air from the hot air injection unit, and the powder is crushed by the crushing unit. It can be crushed into granules, and the resulting bread granules are further secondary dried in the secondary drying passage, and a large amount of waste bread is heated and crushed in a short time to reduce the moisture content. A low bread powder can be effectively obtained.

[0025] In the waste bread processing apparatus configured as described above, the invention according to claim 4 relates to a means for crushing the waste bread provided in the primary drying passage, and rotating the waste bread in the primary drying passage. Crushing blades are protruded from the outer periphery of the freely provided rotating shaft at intervals in the length direction, and the waste bread is finely ground by the convex arc-shaped end face of the crushing blade and the inner surface of the primary drying passage. Although the light weight waste pan cannot be crushed by escaping in the direction of rotation due to the rotational force of the crushing blade, the waste pan is formed by the convex arc-shaped end face of the crushing blade and the inner surface of the primary drying passage. Can be crushed reliably while grinding.

[0026] Further, according to the invention according to claim 5, the hot air blowing means provided in the primary drying passage has a rotary shaft formed in a hollow shape, and is crushed on the outer peripheral surface of the hollow rotary shaft. The injection nozzles are directed in the direction in which the powdery material of the bread is sent out, and the injection nozzles are protruded at regular intervals in the longitudinal direction. Since the hollow rotary shaft communicates with the hot air supply pipe provided outside the primary drying passage, light-weight waste is generated by the wind of hot air injected from the jet outlet of the jet nozzle. The powdery particles can be smoothly transported while blowing off toward the discharge port side of the primary drying passage, and the moisture contained inside while passing through the heated primary drying passage is primarily dried. The water content can be reduced by evaporating into the passage. In addition, the hot air blown out from the spray nozzle further heats the bread pieces and the granules of the waste bread, and the hot air flows through the fine gaps between the porous bread pieces and the granules. Thus, the bread pieces and the granular material can be heated from the inside, and can be efficiently dried in a short time to a predetermined moisture content.

[0027] Further, according to the invention according to claim 6, a shielding plate for temporarily closing the passage is disposed on the side of the transport start end of the waste pan in the primary drying passage so as to be openable and closable. The inside of the passage between the input ports of the input hopper is formed in the storage chamber of the waste pan supplied from the input hopper, and the stored waste pan is crushed by the crushing blade protruding from one end of the hollow rotary shaft in the storage chamber. Therefore, a large amount of waste pans supplied from the charging hopper can be retained and filled in the retention chamber formed by closing the shielding plate, and therefore, the waste pan rotates in the retention chamber. It is possible to increase the amount of waste bread crushed by the convex arc-shaped end surface of the crushing blade and the inner surface of the primary drying passage, and because the waste bread is densely filled in the retaining chamber, the rotation direction of the crushing blade is increased. To run away Sealed, therefore, reliably separated by the rotational force of the crushing blade can be crushed, the crushing process can be performed with one layer, efficiency.

[0028] According to the invention according to claim 7, the outlet of the primary drying passage and the entrance of the secondary drying passage are communicated with each other through a cylindrical vertical passage, and a predetermined size of the cylindrical passage is provided in the vertical passage. A mesh having a large number of small holes of a predetermined size for allowing the bread granules to pass through is stretched, and the bread carried into the vertical passage from the primary drying passage on the upper surface of the mesh. Since the rotary blade is provided to grind the powder more finely, all the pieces of bread sent into the vertical passage can be passed through the small holes of the mesh by the rotary blade. Pulverization can be assuredly carried out, and fine powder suitable for mixing with other ingredients as feed can be supplied to the secondary drying passage side.

[0029] As described in claim 8, a hollow rotary shaft is provided in the center of the secondary drying passage, and hot air is supplied through the hot air supply pipe from outside the secondary drying passage into the hollow rotary shaft. Send The secondary drying passage is configured to heat the inside of the secondary drying passage, and the powdery material of the waste bread is sent to the outer peripheral surface of the hollow rotary shaft toward the outlet side of the secondary drying passage. Since the agitating and conveying plates are protruded at regular intervals in the length direction, the fine powders and granules introduced into the secondary drying passage from the vertical passage are transported at a predetermined conveying speed by the agitating and conveying plates. The powder can be conveyed toward the outlet side, and fine powders are further dried by the heating wall of the secondary drying passage heated by the heater and the heated air in the secondary drying passage. Thus, it is possible to efficiently produce fine bread and granules having a low moisture content and capable of being stored for a long period of time until blended as a feed without adding a storage additive or the like.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a partially cut-away simplified side view of the entire apparatus.

FIG. 2 is a simplified perspective view of the entire apparatus.

FIG. 3 is a partially cut-away simplified perspective view of a stay chamber portion in a primary drying passage.

FIG. 4 is a partial perspective view showing an internal structure of a primary drying passage.

FIG. 5 is a front view of a crushing blade (a) having a straight blade portion and a crushing blade (mouth) having a sickle blade portion.

FIG. 6 is a longitudinal sectional side view of a part of a primary drying passage.

FIG. 7 is a vertical sectional front view of a primary drying passage.

FIG. 8 is a partial perspective view showing the internal structure of a secondary drying passage.

FIG. 9 is a vertical sectional front view of a secondary drying passage.

FIG. 10 is a longitudinal side view of a secondary drying passage.

FIG. 11 is a simplified perspective view of a bottomed tubular mesh body provided with a rotary cutter provided in a vertical passage portion.

FIG. 12 is a vertical sectional front view of a bottomed tubular net provided with a rotary cutter provided in a vertical passage.

FIG. 13 is a plan view of a bottomed tubular mesh body provided with a rotary cutter provided in a vertical passage portion.

Explanation of reference numerals [0031] Primary drying passage

2 Crushing means

2a Hollow rotating shaft

2b crushing blade

2c Convex arc-shaped end face

3 Hot air injection means

3a Hot air jet

3b spout

4 Secondary drying passage

5 Tertiary drying passage

6 Stirring conveyance means

61 Stirring transport plate

7 Vertical passage

7a Cylindrical net with bottom

7b small hole

8a, 8b Hot air supply pipe

9 Outlet

15 Shield plate

16 Detention room

20 rotary blade

BEST MODE FOR CARRYING OUT THE INVENTION

Next, a specific embodiment of the waste bread processing apparatus of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, the disposal device for the waste pan A is connected to and communicates with the lower end of the opening of the waste pan input hopper 10 at the upper peripheral portion of one end, and the waste pan crushing means 2 and the hot air jetting means 3 are provided inside. And the exit force provided at the other end of the primary drying passage 1 which is juxtaposed below the primary drying passage 1 and the powder particles of the discharged waste pan A. A closed cylindrical secondary drying passage 4 for receiving the body a through a vertical cylindrical passage 7 and performing secondary drying, and one of the secondary drying passages 4 arranged in parallel below the secondary drying passage 4. Closed cylindrical tertiary drying passages 5 for further drying and cooling the dried granules a of waste bread A discharged from the end, and are provided in these secondary and tertiary drying passages 4, 5. It comprises stirring and conveying means 6, 6A and a supply pipe 8, which supplies hot air into the primary, tertiary and tertiary drying passages 1, 4, 5.

[0033] The primary drying passage 1 has a horizontal passage portion 11 formed by bending a metal band-shaped plate into a U-shaped cross section. The opening portions at both ends of the horizontal passage portion 11 are completely closed by closing plates 12a and 12b, respectively. The primary drying passage 1 is formed in a horizontal cylindrical shape having a certain length by completely closing the lid 13 which can be opened and closed. The charging hopper 10 is provided, and the lower end of the opening of the charging hopper is communicated with one end of the passage portion 11 of the primary drying passage 1, and the waste pan A charged into the charging hopper 10 is primarily discharged. It is configured to be supplied into the drying passage 1. The hopper 10 is provided with a lid to prevent small animals such as rats and insects from entering the apparatus when not in use, or is provided with a gate shutter so that it can be opened and closed. You can keep it.

[0034] As shown in Figs. 3 and 4, the waste bread crushing means 2 provided in the primary drying passage 1 is disposed at the center of the passage portion 11 and has both ends at the front and rear closing plates 12a, 12b. On the outer peripheral surface of the hollow rotary shaft 2a rotatably supported, a large number of crushing blades 2b are arranged at regular intervals in the longitudinal direction of the hollow rotary shaft 2a in a direction perpendicular to the axial direction. It can be made by protruding.

The disposition state of the crushing blades 2b will be described in more detail. The crushing blades 2b are disposed at three portions in the circumferential direction of the hollow rotary shaft 2a, that is, at portions having a phase difference of 60 ° in the longitudinal direction. The crushing blades 2b, 2b are preferably provided at regular intervals, and are shifted from each other on the virtual spiral line without being provided on the same circumferential surface of the hollow rotary shaft 2a. It is provided as follows.

As shown in FIGS. 3 and 5, each of the crushing blades 2b has a base end integrally fixed to the outer peripheral surface of the hollow rotary shaft 2a and has a vertically long rectangular support plate 2bl projecting from the outer peripheral surface. And a cutter plate 2b2 fixed to one surface of the support plate 2b1, and a blade portion 2b2 'formed on one edge of the cutter plate 2b2 faces the rotation direction of the hollow rotary shaft 2a. One end of support plate 2bl The protruding end face of the hollow rotary shaft 2a of the support plate 2bl and the cutter plate 2b2 which protrudes and faces the arc-shaped inner surface of the passage portion 11 with a slight gap. 2c, the waste circular pan A is crushed and finely ground by the convex circular end face 2c and the circular inner surface of the passage portion 11.

Further, as shown in FIG. 5 (a), the blade portion 2b2 ′ of the cutter plate 2b2 has a straight shape protruding outward with a constant width from one end of the support plate 2bl over the entire length. There are two types, one formed on the blade and the other formed by forming the tip of a straight blade into a sickle-shaped blade portion 2b2 "that protrudes further outward as shown in Fig. 5 (mouth). The cutter plate 2b2 having the sickle-shaped blade portion 2b2 "protrudes from one end of the hollow rotary shaft 2a from the lower part of the input hopper 10 to the vicinity of a shield plate 15 described later, and is inserted from the input hopper 10. The waste pan A is hooked and crushed, and the waste pan A is prevented from staying on the inner bottom of the hopper 10.On the other hand, the cutter plate 2b2 having only the straight blade is a shield plate 15b. It is structured to protrude from the vicinity of the hollow rotary shaft 2a.

Also, the surface of the support plate 2bl of the crushing blade 2b facing the other end of the primary drying passage 1 is gently inclined toward the other end of the hollow rotary shaft 2a in the direction of rotation of the hollow rotary shaft 2a. The inclined surface 2d is formed so that the granular material a of the waste bread A is sent out to the other end side of the primary drying passage 1, that is, to the discharge port 9 side by the inclined surface 2d. At the end of the primary drying passage 1 on the side of the input hopper 10 (closer plate 12a side), high-pressure air is blown out, and the remaining powdery material of the waste pan A is sent to the outlet 9 to clean the passage. A cleaning blower can be provided.

On the other hand, as shown in FIG. 3, FIG. 4, FIG. 6, and FIG. 7, the hot air injection means 3 provided in the primary drying passage 1 has a length in three directions on the outer peripheral surface of the hollow rotary shaft 2a. At a suitable interval in the direction, the outlet 3b is protruded from the other end side of the primary drying passage 1, i.e., a short tube-shaped hot air injection nozzle 3a which is directed toward the feeding direction of the granular material a of the waste pan A. Of the hollow rotary shaft 2a, and one end of the hollow rotary shaft 2a is connected to and communicated with the hot air supply pipe 8 provided outside the primary drying passage. The hot air supplied into the hollow rotary shaft 2a through the spray nozzle 3a is blown out from the spray nozzle 3a to dry the granular material a of the waste pan A, and the granular material a is dried by the wind pressure at the other end of the primary drying passage 1. It is configured so that it is forcibly sent out toward the discharge port 9 provided on the side. In order to inject hot air having a wind pressure from all of these injection nozzles 3a, a certain amount of pressurization is required, and when pressurization is insufficient with only the hot air supply pipe 8 from one of the closing plates 12a. It is also possible to provide a hot air supply pipe communicating with the inside of the hollow rotary shaft 2a also from the other closing plate 12b side and pressurize from both sides. The ejection port 3b of the injection nozzle 3a is formed by bending the tip end of the injection nozzle 3a at a substantially right angle in the direction in which the granular material a of the waste pan A is sent out.

At the center of the lid member 13 of the primary drying passage 1, as shown in FIGS. 1 and 2, water vapor evaporating from inside the granular material a by heating the granular material a of the waste pan A A steam discharge pipe 14 is connected and communicated to the outside of the primary drying passage 1 together with a part of the hot air. The water vapor discharge nove 14 is provided with an on-off valve (not shown) for adjusting the discharge amount.

Further, as shown in FIGS. 1 and 3, one end side passage portion of the primary drying passage 1 is provided on the side of the input hopper 10 in the primary drying passage 1, that is, on the side of the transport start end of the waste pan A. A shield plate 15 for temporarily closing the other end side is provided, and when the passage is blocked by the shield plate 15, the inside of the passage between the shield plate 15 and the one-end closing plate 12a of the primary drying passage 1 is provided. Is formed in the retention chamber 16 of the waste pan A supplied from the input hopper 10.

More specifically, as shown in FIG. 3, the shielding plate 15 has a lower half outer peripheral end surface 15a formed in the same shape as the inner peripheral surface of the primary drying passage 1 and a widthwise center at a lower end portion. A notch 15b formed by cutting a fixed length portion from the lower end face is formed in the lower portion, and when the shielding plate 15 is closed, the hollow rotary shaft 2a is received through the notch 15b in the lower half. The outer peripheral end surface 15a is formed so as to be in close contact with the inner peripheral surface of the primary drying passage 1.

The upper half portion of the shielding plate 15 is projected upward through a through hole 17 provided in the cover member 13 of the primary drying passage 1, and the upper end thereof and the upper portion thereof stand on the cover member 13 of the primary drying passage 1. The connecting member 19 integrally connects the piston rod 18a of the cylinder 18, which is fixed in the installed state, and the shield plate 15 is opened and closed by extending and contracting the piston rod 18a. FIG. 3 illustrates an example of a shielding device using an electric cylinder, and it is preferable to use a force cylinder, which can further reduce the size. The secondary drying passages 4 arranged in parallel below the primary drying passages 1 configured as described above, like the primary drying passages 1, are formed by bending a metal band-shaped plate into a U-shaped cross section. In the same manner as the primary drying passage 1, the horizontal passage 41 is closed at both ends by closing plates 42a and 42b and completely closed by a lid member 43 that can be freely opened at the upper end. A hollow rotary shaft 44, which is formed in a horizontal cylindrical shape and has both ends at the center of the secondary drying passage 4 rotatably supported by the centers of the both-end closing plates 42a and 42b over the entire length thereof. The stirring and conveying means 6 is provided at a plurality of locations on the outer peripheral surface of the hollow rotary shaft 44.

As shown in FIG. 8 and FIG. 10, the stirring / transporting means 6 includes legs 62 and 63 having a fixed length at both ends of a horizontally long stirring / transporting plate 61 long in the longitudinal direction of the hollow rotary shaft 44. The leg 62 on one end side, that is, the leg 63 on the other end side with respect to the leg 62 on the transport direction side of the granular material a of the waste bread A, that is, the vertical passage 7 The legs 63 and 63 are fixed to the outer peripheral surface of the hollow rotary shaft 44 with the side legs 63 slightly shifted in the rotation direction of the hollow rotary shaft 44, so that the surface of the stirring / transporting plate 61 is fixed. The force is formed on a conveying inclined surface 64 that is gently inclined toward the other end side in the direction of rotation of the hollow rotary shaft 44, and the distal end surface 65 of the stirring / conveying plate 61 is further formed on the secondary drying passage 4. Slidably in contact with or close to the inner peripheral surface. Then, the stirring and conveying plates 61 are arranged at regular intervals in the longitudinal direction of the hollow rotary shaft 44, and the adjacent stirring and conveying plates 61, 61 are not disposed on the same circumferential surface of the hollow rotary shaft 44 without being disposed. It is provided so as to be shifted on the helical line.

The other end of the hollow rotary shaft 44 is connected and communicated with the hot air supply pipe 8, and the secondary drying passage is formed by hot air supplied into the hollow rotary shaft 44 through the hot air supply pipe 8. The inside of 4 is heated to dry the powder a of the waste bread A.

Further, the other end of the lid member 43 of the secondary drying passage 4 is provided below the outlet 9 provided at the other end of the primary drying passage as shown in FIGS. A powder material receiving port 45 is provided so as to face the same, and between the discharge port 9 and the receiving port 45, the powder a of the waste bread A is discharged from the discharge port of the primary penetration passage 1 to the secondary drying passage 4. The above-mentioned vertical passage 7 for carrying out to the receiving entrance 45 is provided.

As shown in FIGS. 11 and 13, the vertical passage 7 has a bottom with a completely open upper end. A cylindrical net 7a is provided, and the size of a large number of small holes 7b, which is a mesh force of the net 7a, is formed into a hole having a constant diameter of 5 mm or less, and a fine hole having a diameter of 5 mm or less is formed. Then, the powder a passes through the receiving port 45 of the secondary drying passage 4. The bottomed tubular net 7a is suspended from the outlet 9 or supported by the passage 7, and the lower end of the outlet 9 is opened at the upper end of the net 7a. It is facing.

[0049] Further, on the horizontal inner bottom surface of the bottomed tubular net-like body 7a, the above-mentioned small holes of the net-like body 7a in the granular material a of the waste bread A discharged from the outlet 9 of the above-mentioned primary drying passage 1 A rotary blade 20 is provided for finely pulverizing the powder a having a larger diameter than 7b into a diameter that can pass through the small hole 7b.

[0050] The rotary blade 20 has the shape of a knife, and its base end is integrally fixed to the upper end of a rotary shaft 21 penetrating the center of the bottom surface of the mesh body 7a. A plurality of rotary blades 20 are provided so as to project radially from the rotary shaft 21 so that the tip reaches a portion near the outer peripheral edge of the inner bottom surface of the bottomed tubular mesh body 7a. Furthermore, the cutting blade leading edges 20a of all the rotary blades 20 are directed in the rotation direction of the cutting blade portion 20a, and the lower surface is rotated in a plane direction with a slight gap from the upper surface of the mesh body 7a. Make up.

Further, a base end of one lifting plate 22 is fixed to the rotating shaft 21 below the rotating blade 20 to protrude horizontally from the rotating shaft 21 in the radial direction. The lifting plate 22 is gradually inclined downward in the direction of rotation, and its lower inclined edge is rotated with a narrower gap than the rotating blade 20 with respect to the inner bottom surface of the mesh body 7a. As a result, the large-diameter powder particles a that cannot pass through the small holes 7b of the reticulated body 7a are lifted up from the inner bottom surface of the reticulated body 7a, and are separated into small-diameter powder particles a by the high-speed rotating rotary blade 20. Through the small hole 7b. The motor 23 for rotating the rotary shaft 21 is provided outside the vertical passage 7 as shown in FIG. 1, and rotates the motor 23 via an appropriate rotation transmission mechanism such as a combined gear mechanism. It is configured to transmit to the rotating shaft 21.

On the other hand, the tertiary drying passage 5 arranged in parallel below the secondary drying passage 4 is formed in the same shape as the secondary drying passage ₄ . That is, the horizontal passage portion 51, which is formed by bending a metal band-shaped plate into a U-shaped cross section, is completely closed by the closing plates 52a and 52b at both ends of the horizontal passage portion 51, and the upper end opening is opened and closed by the lid member 53 that can be opened and closed. The tertiary drying passage 5 is completely closed. A hollow rotary shaft 54 is rotatably supported at the center of both ends at the center of the both-end closing plates 52a and 52b over the entire length. The stirring and conveying means 6A is provided on the body at a plurality of locations on the surface.

The stirring and conveying means 6A is also formed in the same shape as the stirring and conveying means 6 provided in the secondary drying passage 4, and as shown in FIG. 8 and FIG. A fixed length leg 62a, 63a is integrally provided at both ends of the horizontal rectangular stirring and transport plate 61a, and the leg 62a on the transport direction side of the powder and granule a of the waste pan A is attached to the other. The legs 62a 63a are fixed to the outer peripheral surface of the hollow rotary shaft 54 in a state where the legs 62a are slightly shifted in the direction opposite to the rotation direction of the hollow rotary shaft 54 with respect to the legs 63a. The surface is formed as a conveying inclined surface 64a which is gently inclined from one end side to the other end side in the rotation direction of the hollow rotary shaft 54, and further, the front end surface 65a of the stirring and conveying plate 61a is tertiary. It is in sliding contact with or near the inner peripheral surface of the drying passage 5. The stirring and conveying plates 61a are arranged at regular intervals in the longitudinal direction of the hollow rotary shaft 54 and adjacent to the stirring and conveying plates 61a, 61a.

Are provided on the virtual spiral line without being disposed on the same circumferential surface of the hollow rotary shaft 54.

[0054] One end of the hollow rotary shaft 54 is connected to and communicated with one end of the hollow rotary shaft 44 in the secondary drying passage 4 through a communication pipe 8c described later. The tertiary drying circuit 5 is heated by hot air supplied into the hollow rotary shaft 54 through the hollow rotary shaft 44 on the side to dry the granular material a of the waste bread A.

Further, at the center in the length direction of the lid members 43 and 53 of the secondary drying passage 4 and the tertiary drying passage 5, similarly to the primary drying passage 1, the waste pan A is disposed in each passage. The discharge pipes 46 and 56 for discharging the water vapor evaporating from the particles a of the air to the outside are connected and communicated. These hot air discharge pipes 46 and 56 are provided with on-off valves (not shown). I have.

[0056] Between the terminal end (one end) of the secondary drying passage 4 and one end of the lid member 53 of the tertiary drying passage 5 located below the end of the conveying, the tertiary drying passage 4 A vertical intermediate passage 7 ′ for feeding the granular material a into the drying passage 5 is connected and communicated, and a moisture meter 30 inside the intermediate passage 7 ′ is attached to the intermediate passage 7 ′. At the same time, the treated powder / granules a, which open downward, are discharged to the lower peripheral portion of the tertiary drying passage 5 on the side of the transport end (the other end). Mouth 9 'is provided.

[0057] The primary drying passage 1 and the secondary drying passage 4 are heated to a constant temperature by winding a heater (not shown) such as a rubber heater over the entire length of the cylindrical wall surface thereof. While the waste bread A is configured to be dried at a high temperature, the tertiary drying passage 5 is provided in one half thereof, that is, in the first half in which the granular material a supplied from the intermediate passage 7 ′ moves toward the other end. A heater is wrapped only around the outer periphery of the pan, and heating is performed so that the water content of the granular material a of the bread is 8% or less. The baked tertiary drying passage 5 is moved on the inner bottom surface of the cylindrical wall surface of the tertiary drying passage 5 toward the discharge port 9 ′ while being cooled, and then the bread granules a are moved. When it is discharged from 9 ', do not absorb the water.

As shown in FIG. 2, the rotating means of the hollow rotary shafts 2a, 44, 54 provided in the primary, tertiary and tertiary drying passages 1, 4, 5, respectively, include: Motors 101, 102, and 103 are disposed on the transport end sides of the motors, 4, and 5, respectively, and the hollow rotary shafts 2a, 44, and 54 rotate at a constant speed from these motors 101-103 via an appropriate deceleration mechanism. It rotates at a speed.

Further, the hot air supply pipe 8 for supplying hot air to the hollow rotary shafts 2a, 44, 54 of the primary, primary and tertiary drying passages 1, 4, 5 protrudes from one end of the primary drying passage 1 side. It consists of a hot air supply pipe 8a with a heater HI connected to one end of the hollow rotary shaft 2a connected via a rotary joint, and protrudes from the other end on the secondary drying passage 2 side. A hot air supply pipe 8b provided with a heater H2 in a pipe connected to and communicating with the hollow rotary shaft 44 via a rotary joint. On the tertiary drying passage 5 side, as described above, a communication pipe 8c connected to and communicated with one end of the hollow rotary shaft 44 in the secondary drying passage 4 is connected to a hot air supply pipe for heating the inside of the tertiary drying passage 5. Become.

[0060] The hot air supply pipes 8a and 8b are provided with pressure reducing valves VI and V2, respectively, and are connected to and communicate with the hollow rotary shaft 2a of the primary drying passage 2a. The pressure valve VI is adjusted so that hot air having a higher pressure than the pressure reducing valve V2 provided in the hot air supply pipe 8b communicating with the hollow rotary shaft 44 on the side of the secondary drying passage 4 can be passed. The hot air supply pipes 8a and 8b are connected to a compressor (not shown) as shown in FIG. These compressed air supply pipes 8 'are connected to and communicate with each other to heat the compressed air. In the apparatus shown in FIG. 1, the force for supplying hot air into the hollow rotary shafts 2a, 44, 54 of the primary, primary and tertiary drying passages 1, 4, 5 by the hot air supply pipe 8 is used. Next, separate hot air supply pipes may be provided for the third and third drying passages.

The hollow rotary shaft 2a in the primary drying passage 1 is provided with a large number of hot air jet nozzles 3a protruding from the hollow rotary shaft 2a, and the hot air supplied into the hollow rotary shaft 2a. Is injected into the primary drying passage 1, so that the other end of the hollow rotary shaft 2a is closed or the flow rate can be adjusted by a throttle valve, an on-off valve, or the like. Although it may be configured, as described above, hot air is supplied into the hollow rotary shaft 2a from both ends of the hollow rotary shaft 2a and all the injection nozzles 3a projecting from the hollow rotary shaft 2a Hot air can be sprayed at a substantially uniform pressure. The hot air that has flowed through the hollow rotary shafts 2a, 44, and 54 may be discharged to the outside air, but the hot air may be returned to the hot air supply pipe 8 and reused. Desired ,.

[0062] In order to treat the waste bread A into a granular material a having an optimum diameter and a low moisture content for combining the waste bread as a part of the feed with the waste bread A treating apparatus configured as described above, first, the primary drying passage is used. 1 and the secondary rotating passages 4 and the hollow rotating shafts 2a, 44 and 54 disposed inside the tertiary drying passage 5 are rotated at a constant rotation speed, and the primary and tertiary drying passages 2a and 44 are rotated. , 54 are heated by a heater provided on the outer peripheral surface of the cylindrical wall surface, and heated by flowing hot air into the hollow rotary shafts 2a, 44, 54 through hot air supply pipes 8 (8a, 8b). I do.

In this state, the waste pan A is continuously charged into the charging hopper 10, and supplied into one end of the primary drying passage 1 through the charging hopper 10. At this time, the shielding plate 15 provided on one end side of the primary drying passage 1 is lowered by the operation of the cylinder 18, and the notch 15b is provided with the crushing blade 2b and the hot air injection nozzle 3a in the hollow rotary shaft 2a. The shield plate 15 and one end of the primary drying passage are brought into close contact with the inner peripheral surface of the primary drying passage 1 by bringing the lower half outer peripheral end surface 15a of the shielding plate 15 into close contact with the inner peripheral surface of the primary drying passage 1. The inside of the passage between the side closing plate 12a and the passage on the side of the outlet 9 of the primary drying passage 1 is formed as a retention chamber 16 which is closed. Accordingly, a large amount of the waste pan A supplied from the input hopper 10 is filled in the stagnant chamber 16 without moving in the primary drying passage 1 to the discharge outlet 9 side, and the outer periphery of the hollow rotary shaft 2a is filled. The crushing blades 2b protruding from the surface are agitated by the rotation of the crushing blades 2b, and the pans rub against each other and are crushed. Bread A is crushed as if crushed.

[0065] Furthermore, since the cutter plate 2B2 of the crushing blade 2b in the retaining chamber 16 is formed as a sickle-shaped blade portion 2b2 "having the tip of a straight blade protruding outward, the input hopper is provided. The waste pan A introduced from 10 is crushed while being hooked by the sickle-shaped blade 2b2 ", and the waste pan A is prevented from staying on the inner bottom of the hopper 10. Further, the waste pan A densely filled in the stagnant chamber 16 resists the rotation of the crushing blade 2b, and therefore, the large waste pan A and the like are separated and crushed by the rotational force of the crushing blade 2b. Is done.

[0066] Further, the hot air supplied into the hollow rotary shaft 2a through the hot air supply pipe 8 flows out of the injection nozzle 3a into the primary drying passage 1 including the retaining chamber 16, and the primary air is heated together with the heater. The air in the drying passage 1 has changed to dry high-temperature air. Therefore, in the retaining chamber 16, part of the water contained in the waste bread A evaporates into the retaining chamber 16, and the water content is reduced.

[0067] Waste bread A usually has a water content of 35 to 40%, and if it is left as it is, it has a high water content and will spoil before it is used as feed. The water content must be less than 8% to be able to be stored before blending into the feed. In addition, if the crushed pieces and powder a of the waste bread A are large or if their size and particle size vary, it is difficult to set the mixing ratio with other feed ingredients accurately. Therefore, it is necessary to grind all the waste bread A to a fine particle size of 5 mm or less.

[0068] The granular material a of the waste bread A satisfying the above conditions can be agitated by the crushing blades 2b in the retaining chamber 16 or crushed or heated only by supplying hot air from the injection nozzle 3a. It is difficult to obtain even over a long time. Therefore, after the primary crushing treatment is performed on the waste bread A in the stagnant chamber 16 until the relatively small bread pieces and the large and small-diameter granular material a are mixed, the shielding plate 15 is opened. In addition, the shielding plate 15 is raised up to about 3 cm from the inner bottom surface of the staying chamber 16 without being pulled up significantly, and the bread pieces crushed to a certain extent are removed from the gap. You can pass it out of the detention room 16 out of the department.

[0069] When the shielding plate 15 is opened, the crushed bread pieces and the granular material a are combined with the inclined surface 2d of the crushing blade 2b protruding from the outer peripheral surface of the hollow rotary shaft 2a and the powder. The particles are conveyed toward the discharge port 9 side of the primary drying passage 1 by the hot air blown out from the discharge port 3b of the spray nozzle 3a directed in the particle delivery direction. In the course of this conveyance, contact with the peripheral wall surface of the primary drying passage 1 heated by the heater ゃ The high-temperature air in the primary drying passage 1 causes the moisture contained in the bread pieces and the granules a to be removed from the primary drying passage 1. It is discharged as steam in 1 and is discharged out of the primary drying passage together with some high-temperature air (hot air) through a steam discharge pipe 14.

[0070] In the primary drying passage 1, the bread pieces and the granular material a are conveyed to the discharge port 9 side by the conveying action by the inclined surface 2d of the crushing blade 2b or by the low speed constantly flowing out from the injection nozzle 3a. Hot air alone is not sufficient and cannot be performed smoothly. For this reason, high-pressure heating air (hot air) is pumped into the hollow rotary shaft 2a at regular intervals, for example, every 10 seconds, through the hot-air supply pipe 8, and instantaneously flows from the ejection port 3b of the ejection nozzle 3a toward the discharge port 9 side. The transport speed is adjusted by blowing out the bread pieces / granules a toward the discharge port 9 by the high-speed hot air flow.

[0071] Furthermore, since the bread flakes / powder / granules a are porous, the hot wind spouted from the ejection port 3b of the injection nozzle 3a circulates through the fine voids in these bread flakes / powder bodies and from the inside. Is also heated, and the action of removing contained moisture is more effectively performed. In addition, the protruding arc-shaped end face 2c of the rotating crushing blade 2b and the arc-shaped inner surface of the passage portion 11 of the primary drying passage 1 crush the waste pan A biting between these surfaces so as to crush it. I do.

[0072] The bread pieces / powder particles a that have been appropriately dried and crushed in this way drop into the vertical passage 7 through the outlet 9 when reaching the other end of the primary drying passage 1. A cylindrical net-like body 7a with a bottom is disposed in the vertical passage 7, and a plurality of rotary blades 20 radially protruding from a rotary shaft 21 are provided on the inner bottom surface of the net-like body 7a. Have been. Accordingly, in the piece of bread and the granular material a that has fallen on the network 7a, the fine and granular material a having a smaller diameter than the large number of small holes 7b formed of the mesh of the network 7a is used as it is as the bottom or peripheral wall surface of the network 7a. After passing through the small hole 7b of the second drying passage 4 and falling to the inlet 45 side, the bread piece having a larger diameter than the small hole 7b Is divided by the rotating blade 20 rotating at high speed.

[0073] At this time, one lifting plate 22 protruding from the rotation shaft 21 rotates so that the lower inclined edge of the rotation direction side thereof is in contact with the inner bottom surface of the mesh body 7a, A piece of bread that cannot pass through the small hole 7b of the mesh body 7a-the coarse powder a is lifted to prevent clogging, and the bread piece that has been lifted-the coarse powder a is rotated at a high speed. The blade 20 is finely divided by the leading edge 20a of the cutting blade, and this dividing action is repeated until the powder particles a having a small diameter that can pass through the small holes 7b of the mesh body 7a, and all the particles falling into the mesh body 7a are removed. Bread pieces of waste bread A 廃棄 Pulverized particles a are crushed into fine particulate particles a. In addition, the processing amount per unit time of the bread piece of the waste bread A passing through the mesh body 7a and the granular material a per unit time is substantially equal to the input amount of the waste bread A to be input to the input hopper 10, and the primary drying is performed. The inside of the secondary drying passage 4 and the tertiary drying passage 5 from the passage 1 is configured so that the granular material a is processed while being continuously conveyed.

[0074] When the finely divided small-diameter powder particles a thus pulverized are discharged into the other end of the secondary drying passage 4 through the receiving port 45, the secondary drying passage 4 contains: A hollow rotary shaft 44 provided with a stirring and conveying plate 61 constituting the stirring and conveying means 6 at appropriate intervals in the length direction is provided, and the distal end surface 65 of the stirring and conveying plate 61 is connected to a secondary drying passage. Since the agitating / conveying plate 61 rotates, the granular material a is agitated in the circumferential direction of the secondary drying passage 4 and is heated by the heater because the agitating / conveying plate 61 rotates. Evenly contacts the wall surface of the secondary drying passage 4 and the moisture contained therein evaporates and is further removed, lowering the water content

Further, hot air is circulated in the hollow rotary shaft 44 through a hot air supply pipe 8b, and the hot air heats the hollow rotary shaft 44 and the agitating / conveying plate 61, as well as the air in the secondary drying passage 4. Is also heated, the action of removing water in the granular material a is further promoted. In addition, the stirring and transporting plate 61 is formed in a horizontally long rectangular shape that is long in the longitudinal direction of the hollow rotary shaft 44, and the powder transport surface is moved from one end to the other end in the rotational direction of the hollow rotary shaft 44. Is formed on the conveying inclined surface 64 gently inclined toward the side, so that the powder a conveyed to the outlet side of the secondary drying passage 4 by the conveying inclined surface 64 according to the rotation of the stirring conveying plate 61. Since the transport speed is slow, the drying time in the secondary drying passage 4 is prolonged, and the powder a is effectively dried. As described above, when the granular material a is conveyed while being dried in the secondary drying passage 4 and reaches the conveyance end portion of the secondary drying passage 4, the secondary drying is performed through the vertical intermediate passage 7 ′. It falls into one end of the tertiary drying passage 5 disposed below the passage 4. At this time, the water content of the granular material a (the water content in the intermediate passage 7 ') is detected by the water measuring device 30 attached to the intermediate passage 7'. / _{0, the} degree of heating in the first half of the tertiary drying passage 5 is adjusted and controlled by the heater H2, or the rotational speed of the hollow rotary shaft 54 is changed to perform the tertiary drying of the granular material a. The drying time is controlled by adjusting the residence time in the passage 5.

[0077] Then, in the first half of the tertiary drying passage 5, the fine powder a is slowly discharged by the inclined conveying surface 64a while being agitated by the agitating and conveying plate 61a protruding from the hollow rotary shaft 54. All the granules a are dried to a low moisture content of 8% or less, which can be stored, while being transported toward The heat is cooled and the outlet 9 'is put into an appropriate storage container B or the like and stored. The heat of the bread granules a is relieved in the latter half of the tertiary drying passage 5 because if it is taken out of the tertiary drying passage 5 while it is hot, it absorbs moisture and hardens. The water contained in the granular material a is converted into steam by heating, evaporates in the secondary drying passage 4 and the tertiary drying passage 5, and is discharged to the outside through the discharge pipes 46 and 56. Similarly to the hopper 10 on the primary drying passage 1 side, a gate shutter may be provided at the discharge port 9 'to prevent invasion of small animals such as rats and insects when not in use.

Industrial applicability

[0078] The method and apparatus for treating waste bread according to the present invention are used by efficiently grinding and drying waste bread discharged from a convenience store, a food manufacturing plant, or the like, and mixing it with livestock feed or the like. The bread can be processed into a powder form so that it can be processed.

Claims

The scope of the claims

[1] Waste bread is supplied into the primary drying passage, crushed finely by the crushing means provided in the primary drying passage, and the moisture content of the crushed bread powder is reduced, followed by secondary drying. A method for treating waste bread, wherein the method further comprises reducing the moisture content of the crushed bread granules supplied into the passage.

[2] The waste according to claim 1, wherein the powdery and granular material of the bread discharged from the outlet of the primary drying passage is further subjected to secondary crushing while being continuously fed into the secondary drying passage. How to process bread.

[3] A primary drying passage having a horizontal tubular shape having a waste hopper charging hopper and having crushing means and hot air injection means therein, and an outlet force of the primary drying passage. A waste bread treatment device comprising a horizontal cylindrical secondary drying passage for receiving and performing secondary drying.

[4] The crushing means for the waste pan provided in the primary drying passage is provided with crushing blades protruding from the outer periphery of a rotating shaft rotatably provided in the primary drying passage at intervals in the longitudinal direction. 4. The waste bread processing apparatus according to claim 3, wherein the waste bread is finely ground by a crushing blade.

[5] The hot-air spraying means provided in the primary drying passage has a rotary shaft formed in a hollow shape, and the blowout port is directed to the outer peripheral surface of the hollow rotary shaft in a direction in which the crushed bread powder is sent out. A hot air supply pipe in which the injection nozzles protrude at an interval in the length direction, communicates with the hollow rotation shaft, and the hollow rotation shaft is disposed outside the primary drying passage. The waste pan treatment apparatus according to claim 3 or 4, wherein the waste pan treatment apparatus is communicated with a waste pan.

[6] Temporarily close the passage at the starting end side of the waste pan in the primary drying passage. A shielding plate is provided so as to be openable and closable. It is formed in the accumulation chamber of the waste pan supplied from the hopper, and the accumulated waste pan is crushed by crushing blades protruding from one end of the hollow rotary shaft in the accumulation chamber. The waste bread processing apparatus according to any one of claims 3 to 5, wherein:

[7] The outlet of the primary drying passage and the entrance of the secondary drying passage are connected by a vertical cylindrical passage In this vertical passage, there is provided a mesh having a number of small holes of a predetermined size through which the granular material of bread of a predetermined size passes, and a primary mesh is provided on the upper surface of the mesh. The waste paper according to any one of claims 3 to 6, further comprising a rotary blade for further finely pulverizing the granular material of the bread carried into the vertical passage from the drying passage side. Processing equipment.

[8] A hollow rotary shaft is arranged in the center of the secondary drying passage, and hot air is sent into the hollow rotary shaft from outside the secondary drying passage through a hot air supply pipe to heat the inside of the secondary drying passage. And a plurality of agitated and conveyed plates for feeding the granules of the waste bread toward the outlet side of the secondary drying passage on the outer peripheral surface of the hollow rotary shaft. The waste bread processing apparatus according to any one of claims 3 to 7, wherein the apparatus is disposed so as to protrude.