CN104344689A - Method for heating domestic wastes by hot air to evaporate moisture and drying device of method - Google Patents
Method for heating domestic wastes by hot air to evaporate moisture and drying device of method Download PDFInfo
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- CN104344689A CN104344689A CN201410548253.2A CN201410548253A CN104344689A CN 104344689 A CN104344689 A CN 104344689A CN 201410548253 A CN201410548253 A CN 201410548253A CN 104344689 A CN104344689 A CN 104344689A
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Abstract
The invention relates to the field of domestic waste drying treatment and in particular relates to a method for heating domestic wastes by hot air to evaporate moisture and a drying device of the method. The method is characterized in that the domestic wastes are continuously heated and the temperature of the domestic wastes is kept in the range of 100-270 DEG C for evaporating the moisture in the wastes. The drying device comprises a rotary kiln provided with a heating device in the length direction. According to the method, the domestic wastes are continuously heated to evaporate the moisture in the wastes, the obtained dried wastes can be gasified to prepare fuel gas, and the problem that a gasification furnace cannot keep normal operation when non-dried wastes are put into the gasification furnace to prepare the fuel gas is solved. According to the drying device, on one hand, the domestic wastes can be uniformly dried after being put into the rotary kiln by continuous rolling of the rotary kiln; on the other hand, the heating device is added to the rotary kiln in the length direction, so that the whole rotary kiln is in a continuously heated state, and the wastes are continuously heated during rolling for evaporating the moisture in the wastes and are gradually dried.
Description
Technical field
The present invention relates to house refuse drying and processing field, in particular to a kind of method and drying unit thereof of Hot-blast Heating house refuse transpiring moisture.
Background technology
Rubbish moisture about 50%, calorific value presses 1000kcal/kg, gets equivalent proportion 0.15, and the gas-air amount namely sent into is 15% of theoretical air requirement, namely about 15% of rubbish institute carbon containing (C) total amount burns at burner hearth naked light, produces CO
2gas heat release, for sequential reduction, district provides heat, and about 85% of rubbish institute carbon containing (C) total amount becomes carbide semicoke (as black rice grain, being commonly called as semicoke), with the rotary current of rotary kiln to reducing zone and CO
2gas reaction generating gas.It can thus be appreciated that rubbish release heat in stove is 1000kcal/kg × 15%=150kcal/kg, and moisture about 50% i.e. 0.5kg, its water evaporation calorific requirement is 600kcal/kg × 0.5kg=300kcal.Water evaporation power consumption 300kcal > rubbish release heat 150kcal, therefore, directly puts into gasifier system combustion gas by the rubbish of not drying, can not maintain operation.
Application number is 200810229585.9 disclose domestic waste drying pretreatment method and device, and adopt independent drying machine to carry out drying to rubbish in this application, but which increase the cost of operation, and treating capacity is little, energy consumption is large.
Application number is 200910075330.6 disclose the method utilizing reducing gases in rubbish gas heating DRI, with the addition of lump coal, moulded coal or coke to increase the heat of burning, but produce too many CO like this in the process of burning away the refuse
2waste gas, is applied to combustion gas processed and means and gasify unsuccessfully.In like manner, adopt gasification furnace when sending the mode of combustion air to maintain more and run, also can produce too many CO
2waste gas.
1 gasification furnace can gasification process house refuse 1000t/d, and wherein moisture is about 500t, if the combustion gas containing water vapor 500t/d that gasification furnace is discharged, obviously cannot normally run.Therefore, rubbish cannot be dried in gasification furnace.
At present, domestic and international rubbish is dried and is mainly adopted in two ways, a kind of oven dry thermal source > 270 DEG C of employing, but plastics temperature more than 270 DEG C can be dissolved, and rubbish can the group of being formed, and occluding device makes oven dry failure; The another kind of oven dry thermal source < 270 DEG C adopted, dryer sent into by the rubbish of normal temperature humidity, and the thermal source of dryer can be made to be down to rapidly less than 100 DEG C, and moisture cannot evaporate, and dries unsuccessfully.Exactly because there is no garbage drier both at home and abroad so far, so house refuse combustion gas tries to suffer defeat after defeat repeatly.
In view of this, special proposition the present invention.
Summary of the invention
The first object of the present invention is a kind of method providing Hot-blast Heating house refuse transpiring moisture, continue to heat to house refuse, the temperature of house refuse is made to remain between 100 DEG C-270 DEG C, to evaporate moisture wherein, obtain the rubbish of drying, then make combustion gas for gasification, at present the rubbish of not drying is put into gasifier system combustion gas to solve, the normal problem run can not be maintained.
The second object of the present invention is to provide a kind of drying unit, and this device improves further on the basis of rotary kiln, both make use of the continuous rolling of rotary kiln, can be dry after putting into make house refuse more homogeneous; Length direction on the other hand along rotary kiln with the addition of heater, makes whole rotary kiln be in the state continuing to be heated, makes the rubbish in it constantly be heated to evaporate the moisture contained in rubbish in rolling, make rubbish progressively dried.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
A method for Hot-blast Heating house refuse transpiring moisture, comprises the following steps:
Continue to heat to house refuse, make the temperature of house refuse remain between 100 DEG C-270 DEG C, to evaporate moisture wherein.
The method of a kind of Hot-blast Heating house refuse transpiring moisture provided by the invention, continue to heat to house refuse, as heated house refuse in rotary kiln, along rotary kiln length, multiple heater is set, rubbish all can be heated at the different parts of rotary kiln, thus house refuse is dried when moving to rotary kiln afterbody.The temperature of house refuse is enable to remain on more than 100 DEG C like this, to evaporate moisture wherein, obtain the rubbish of drying, the garbage energy of then drying is enough in gasification and makes combustion gas, solve and at present the rubbish of not drying is put into gasifier system combustion gas, the normal problem run can not be maintained.
Preferably, percentage, the water content of the rubbish of described oven dry is less than 10%.The rubbish of such oven dry better can make combustion gas for gasification, solves and at present the rubbish of not drying is put into gasifier system combustion gas, can not maintain the normal problem run.
Preferably, for house refuse continue to the thermal source of heat be combustion gas processed gasification furnace produce slag be raw material.As: in rotary kiln, heat house refuse, the heater of rotary kiln is that heater can be hot-blast stove etc. with the slag of gasifier system combustion gas generation for raw material.Preferably, described house refuse is constantly rolled in heating process.House refuse hankers continuous rolling adding, and be both beneficial to the homogeneous heating of rubbish, the moisture be also beneficial in rubbish is constantly evaporated.
Present invention also offers the drying unit of the method implementing Hot-blast Heating house refuse transpiring moisture, comprise rotary kiln, the length direction of described rotary kiln is provided with heater.
Drying unit provided by the invention improves further on the basis of rotary kiln, both make use of the continuous rolling of rotary kiln, can be dry after putting into make house refuse more homogeneous; Length direction on the other hand along rotary kiln with the addition of heater, makes whole rotary kiln be in the state continuing to be heated, makes the rubbish in it constantly be heated to evaporate the moisture contained in rubbish in rolling, make rubbish progressively dried.
Preferably, described heater comprises thermal source and the soft seal be enclosed on described rotary kiln is subject to wind mechanism, and described thermal source is connected by pipeline by wind mechanism with described soft seal;
Described soft seal comprises thermal insulation layer and the soft seal layer with described rotary kiln linear contact lay by wind mechanism, and described soft seal is by having space between wind mechanism and described rotary kiln, for passing into the hot gas that described thermal source provides.
Thermal source provides heat, and the heat provided is subject to wind mechanism through Cemented filling to soft seal, and soft seal can be set to along rotary kiln circumference parcel by wind mechanism, or part covers rotary kiln; Rotary kiln rotates, soft seal is not rotated with the rotation of rotary kiln by wind mechanism, soft seal is fixed by support by wind mechanism, soft seal is linear contact lay by wind mechanism and rotary kiln, at high temperature can sealing gas, soft seal is by having space between wind mechanism and rotary kiln, for passing into the hot gas that thermal source provides.
Wherein, thermal source can be the equipment such as hot-blast stove, heat exchanger, can be also the heat of recovery, as the hot gas etc. that the gasification furnace for burning away the refuse produces; Also can use together for several device.Preferably, the thermal source of heater comprises hot-blast stove.If select hot-blast stove, the slag that hot-blast stove produces with the gasification furnace of combustion gas processed is for raw material; In addition, the flue gas that hot-blast stove is discharged is lower than 260 DEG C, and be transported to the burner hearth of rotary kiln, flue dust wherein becomes a part for rubbish, together with the steam that waste gas and rubbish evaporate, through pipeline flow-direction cooler.So both reclaim the heat of hot-blast stove, dispense again its flue gas produced of process separately.If the heat that hot-blast stove produces can not be satisfied the demand, heat exchanger or other heater can also be added simultaneously to by wind mechanism transfer heat.
At 1 atmosphere pressure the water 1kg of 20 DEG C is heated as steam, needs to consume heat energy 594.53kcal (heat of vaporization of 1kg water); 1kg water is heated to 100 DEG C, often heats increase by 1 DEG C and will consume heat energy 1kcal (this is 1kg specific heat of water).1t rubbish water content calculates according to 50%, dries to moisture content 10%, and specific heat will calculate according to heating 500kg water, and heat of vaporization calculates according to 400kg water.Rubbish mean temperature is according to 20 DEG C of calculating.Then: drying 1t rubbish needs to consume heat energy: (80kcal/kg × 500kg+594.53kcal/kg × 400kg) ÷ 7000kcal/kg marks coal=40kg and marks coal.Do thermal source without coal in the present invention, but the slag burning gasification furnace discharge provides thermal source as raw material.
The burning of gasifier system combustion gas is different from the phosphorus content of the slag that naked light burns, and naked light burning belongs to oxygen enrichment Thorough combustion, belongs to oxidizing atmosphere, in stove, C+O occurs
2=CO
2, the phosphorus content of the slag after naked light burning is very little, is about 3-5%; Gasification furnace wants output combustion gas, needs to carry out under reducing atmosphere in stove, carbon (C) cannot with oxygen (O
2) reaction, carbon namely can only carry out with carbon dioxide reaction under the atmosphere of anoxic, and the reaction of generation is C+CO
2=2CO, belongs to reduction reaction, and this reaction exists saturation degree problem, namely contains CO in boiler slag carbon content 24%, combustion gas
2reach balance (no longer reacting) when being also 24%, therefore, the boiler slag carbon content of discharging from gasification furnace is 24%.The slag that gasification furnace is discharged is used for Combustion of Hot Air Furnace, and the heat of generation is converted to hot-air seasoning rubbish, comprehensively make use of the residual energy, makes oven dry rubbish and combustion gas processed form complete supply chain, the more environmental protection of this supply chain.
As: in order to better prevent distributing of heat in hot gas, soft seal can be set to four layers by wind mechanism, as shown in Figure 2, be followed successively by the first heat-resisting steel layer 8, wear-resisting stratum reticulare 9, soft composite layer 10 and the second heat-resisting steel layer 11 from top to bottom, wherein, soft composite layer adopts the soft material of high abrasion, as: high wear-resistant rubber, high abrasion TPV material etc., soft composite layer and rotary kiln linear contact lay.The soft seal of this structure is easy to fixing by wind mechanism, and durable.
Preferably, rotary kiln is horizontal installation, and the gradient of installation is 2-6%.After such installation, rubbish is put into the kiln hood of rotary kiln, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish also constantly rolls with the rotation of rotary kiln, rubbish is constantly heated in the process toward the movement of kiln tail, as being heated to 40 DEG C by kiln hood, is progressively heated to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C etc. in the process toward the movement of kiln tail, thus constantly dried, by adjusting the temperature of the heater of rotary kiln, when making rubbish arrive kiln tail, rubbish is dried.
Empirical tests, the length of the rotary kiln used is 6-45m, the diameter of rotary kiln is 1-5m, at the length direction of rotary kiln, a heater is set every 3-4m, the temperature of hot gas is not more than 270 DEG C, can well realize being dried when rubbish arrives kiln tail, and temperature is not more than 270 DEG C, can not be agglomerating by the plastics in the rubbish that heats, thus the phenomenon of the equipment that can not result in blockage.Preferably, the length of described rotary kiln is 6-45m, and the diameter of described rotary kiln is 1-5m, and the length direction of described rotary kiln arranges a heater every 3-4m, and the temperature of described hot gas is not more than 270 DEG C.
According to length and the diameter of rotary kiln, adjust different hot air temperature and dried to make rubbish.Further, the temperature of described hot gas is 150-270 DEG C.
Preferably, described thermal source and described soft seal are provided with air-introduced machine by between wind mechanism, and the rotary kiln position that described soft seal layer covers is provided with multiple through hole.Hot blast is constantly incorporated into soft seal by between wind mechanism and rotary kiln by air-introduced machine, rotary kiln is arranged multiple through hole, thus hot blast is constantly blown in rotary kiln, the air-blowing of being heated in continuous rolling of the rubbish in rotary kiln is moved, accelerates the rate of drying of rubbish significantly.
Preferably, be provided with raising material unit in described rotary kiln, described raising material unit is for be provided with multiple lifting bucket along described rotary kiln inwall.Rubbish rolls with the rotation of rotary kiln, the rubbish of rotary kiln better disperses by raising material unit, rubbish is constantly mentioned and is raised by lifting bucket, and the hot blast sent into by wind mechanism of soft seal step by step step evaporates by heat out steam, and rubbish is dried faster.
Preferably, described drying unit also comprises the cooler, gas-liquid separator and the foul smell decomposition box that are connected successively by pipeline.
Steam and the waste gas of rotary kiln evaporation first pass into cooler by pipeline, cooled steam and waste gas pass into gas-liquid separator, and gas-liquid separator separates goes out gas and liquid, and liquid gets final product qualified discharge through simple process, isolated gas is containing frowziness, and foul smell comprises: ammonia (NH
3), trimethylamine (C
3h
9n), hydrogen sulfide (H
2s), methyl mercaptan (CH
4s), methyl sulfide (C
2h
6s), except the boiling point 37.3 DEG C of methyl sulfide, all the other the highest 7.6 DEG C of just boilings, they evaporate with steam, obtain after cooler through gas-liquid separator separates again, and isolated gas pumps into foul smell decomposition box, stink is converted into the nutriment of biological bacteria, stink zero-emission.Without the discharge of garbage leachate in whole processing procedure.
In this process, foul smell decomposition box uses the foul smell decomposition box of commercially available removal stink, deodorant can be used, or biological bacteria decomposition box, or vegetation water deodorizing etc., as: the biological bacteria decomposition box buying the gloomy source great achievement waste odour-gas cleaning equipment Manufacturing Co., Ltd from Yangzhou, 25 seconds can vent gas up to standard.
Compared with prior art, beneficial effect of the present invention is:
(1) continue to the mode of heat by giving house refuse, house refuse is constantly heated, the moisture that rubbish contains constantly is evaporated, and rubbish is dried, and well solves existing because rubbish can not be dried or the problem of the too high occluding device of Yin Wendu;
(2) rotary kiln is horizontal installation, the gradient of installing is 2-6%, rubbish is put into the kiln hood of rotary kiln, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish also constantly rolls with the rotation of rotary kiln, and rubbish is constantly heated in the process toward the movement of kiln tail, evaporates moisture wherein, thus constantly dried, by adjusting the temperature of the heater of rotary kiln, when making rubbish arrive kiln tail, rubbish is dried;
(3) on rotary kiln, soft seal is added by wind mechanism, good collection heat, make rotary kiln in rotation process, rubbish is constantly heated, and the rotary kiln of soft seal by wind mechanism covering is provided with multiple through hole, thus hot blast is constantly blown in rotary kiln, the air-blowing of being heated in continuous rolling of the rubbish in rotary kiln is moved, accelerates the rate of drying of rubbish significantly;
(4) be provided with raising material unit in rotary kiln, better disperseed by raising material unit when rubbish rolls in the rotation with rotary kiln, accelerate the drying rate of rubbish further;
(5) drying unit also comprises the cooler, gas-liquid separator and the foul smell decomposition box that are connected successively by pipeline, without the discharge of garbage leachate and pollutant in whole processing procedure;
(6) thermal source of heater comprises hot-blast stove, and the slag that hot-blast stove produces with the gasification furnace of combustion gas processed, for raw material, well make use of the slag that combustion gas processed produces, and makes oven dry rubbish and combustion gas processed form complete supply chain, the more environmental protection of this supply chain.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in detailed description of the invention or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of the drying unit of the method for the Hot-blast Heating house refuse transpiring moisture that Fig. 1 provides for the embodiment of the present invention 1;
Fig. 2 is the generalized section of soft seal provided by the invention by wind mechanism.
Reference numeral: 1, kiln hood; 2, soft seal is by wind mechanism; 3, support; 4, hot-blast stove; 5, cooler; 6, gas-liquid separator; 7, biological bacteria decomposition box; 8, the first heat-resisting steel layer; 9, wear-resisting stratum reticulare; 10, soft composite layer; 11, the second heat-resisting steel layer.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturer suggestion is carried out.The unreceipted production firm person of instrument, being can by the conventional products of commercially available acquisition.
Embodiment 1
As shown in Figure 1, horizontally install back rotary kiln, the gradient of installation is 2%, and the length of the rotary kiln selected is 6m, and diameter is 1m, and the length direction of rotary kiln arranges a heater every 3m;
Heater comprises hot-blast stove 4 and the soft seal be enclosed on described rotary kiln is subject to wind mechanism 2, soft seal comprises thermal insulation layer and the soft seal layer with rotary kiln linear contact lay by wind mechanism 2, soft seal is wrapped up along rotary kiln circumference by wind mechanism 2, and and leave space between rotary kiln, support 3 is subject to wind mechanism 2 for fixing soft seal, the slag that hot-blast stove 4 produces with the gasification furnace of combustion gas processed is for raw material, the hot gas provided passes into soft seal by wind mechanism 2 through air-introduced machine by pipeline, the rotary kiln position that soft seal covers by wind mechanism 2 is provided with multiple through hole, hot blast is blown in rotary kiln, wherein, the temperature 250-270 DEG C of hot gas, the flue gas that hot-blast stove produces passes in rotary kiln by pipeline, rotary kiln inwall is provided with multiple lifting bucket,
House refuse after broken sorting is transported to kiln hood 1 and sends in rotary kiln by drawing-in devices such as conveyers, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish is mentioned and raises by multiple lifting buckets that rotary kiln inwall is arranged, the hot blast sent into by wind mechanism 2 by soft seal step by step step evaporates by heat out steam, and rubbish is dried;
Steam and the waste gas of rotary kiln evaporation first pass into cooler 5 by pipeline, cooled steam and waste gas pass into gas-liquid separator 6, gas-liquid separator 6 isolates gas and liquid, liquid gets final product qualified discharge through simple process, isolated gas pumps into the biological bacteria decomposition box 7 buying the gloomy source great achievement waste odour-gas cleaning equipment Manufacturing Co., Ltd from Yangzhou, stink is converted into the nutriment of biological bacteria, and 25 seconds got final product vent gas up to standard, stink zero-emission;
Without the discharge of garbage leachate in whole processing procedure, the rubbish of oven dry can be directly used in preparation combustion gas.
Embodiment 2
Horizontally install back rotary kiln, the gradient of installation is 4%, and the length of the rotary kiln selected is 20m, and diameter is 5m, and the length direction of rotary kiln arranges a heater every 4m;
Heater comprises hot-blast stove, heat exchanger and the soft seal be wrapped on rotary kiln are subject to wind mechanism, soft seal comprises thermal insulation layer and the soft seal layer with rotary kiln linear contact lay by wind mechanism, soft seal layer is along rotary kiln circumference parcel, and and leave space between rotary kiln, the slag that hot-blast stove produces with the gasification furnace of combustion gas processed is for raw material, the hot gas that hot-blast stove and heat exchanger produce passes into soft seal by wind mechanism through air-introduced machine by pipeline, the rotary kiln position that soft seal covers by wind mechanism is provided with multiple through hole, hot blast is blown in rotary kiln, wherein, the temperature of hot gas is 200-250 DEG C, the flue gas that hot-blast stove produces passes in rotary kiln by pipeline, rotary kiln inwall is provided with multiple lifting bucket,
House refuse after broken sorting is transported to kiln hood and sends in rotary kiln by drawing-in devices such as conveyers, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish is mentioned and raises by multiple lifting buckets that rotary kiln inwall is arranged, the hot blast sent into by wind mechanism by soft seal step by step step evaporates by heat out steam, and rubbish is dried;
Steam and the waste gas of rotary kiln evaporation first pass into cooler by pipeline, cooled steam and waste gas pass into gas-liquid separator, gas-liquid separator separates goes out gas and liquid, liquid gets final product qualified discharge through simple process, isolated gas pumps into the biological bacteria decomposition box buying the gloomy source great achievement waste odour-gas cleaning equipment Manufacturing Co., Ltd from Yangzhou, stink is converted into the nutriment of biological bacteria, and 25 seconds got final product vent gas up to standard, stink zero-emission;
Without the discharge of garbage leachate in whole processing procedure, the rubbish of oven dry can be directly used in preparation combustion gas.
Embodiment 3
Horizontally install back rotary kiln, the gradient of installation is 6%, and the length of the rotary kiln selected is 45m, and diameter is 3m, and the length direction of rotary kiln arranges a heater every 3m;
Heater comprises hot-blast stove and the soft seal be enclosed on described rotary kiln is subject to wind mechanism, soft seal comprises thermal insulation layer and the soft seal layer with rotary kiln linear contact lay by wind mechanism, soft seal layer is along rotary kiln circumference parcel, and and leave space between rotary kiln, the slag that hot-blast stove produces with the gasification furnace of combustion gas processed is for raw material, the hot gas provided passes into soft seal by wind mechanism through air-introduced machine by pipeline, the rotary kiln position that soft seal covers by wind mechanism is provided with multiple through hole, hot blast is blown in rotary kiln, wherein, the temperature 150-200 DEG C of hot gas, the flue gas that hot-blast stove produces passes in rotary kiln by pipeline, rotary kiln inwall is provided with multiple lifting bucket,
House refuse after broken sorting is transported to kiln hood and sends in rotary kiln by drawing-in devices such as conveyers, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish is mentioned and raises by multiple lifting buckets that rotary kiln inwall is arranged, the hot blast sent into by wind mechanism by soft seal step by step step evaporates by heat out steam, and rubbish is dried;
Steam and the waste gas of rotary kiln evaporation first pass into cooler by pipeline, cooled steam and waste gas pass into gas-liquid separator, gas-liquid separator separates goes out gas and liquid, liquid gets final product qualified discharge through simple process, isolated gas pumps into the biological bacteria decomposition box buying the gloomy source great achievement waste odour-gas cleaning equipment Manufacturing Co., Ltd from Yangzhou, stink is converted into the nutriment of biological bacteria, and 25 seconds got final product vent gas up to standard, stink zero-emission;
Without the discharge of garbage leachate in whole processing procedure, the rubbish of oven dry can be directly used in preparation combustion gas.
The method of the Hot-blast Heating house refuse transpiring moisture that above embodiment provides continues to the mode of heat by giving house refuse, house refuse is constantly heated, the moisture that rubbish contains constantly is evaporated, rubbish is dried, and well solves existing because rubbish can not be dried or the problem of the too high occluding device of Yin Wendu.Concrete drying unit comprises rotary kiln, heater, cooler, gas-liquid separator and foul smell decomposition box.By horizontal for rotary kiln installation, the gradient of installing is 2-6%, rubbish is put into the kiln hood of rotary kiln, with the revolution of rotary kiln, rubbish moves from kiln hood to kiln tail, rubbish also constantly rolls with the rotation of rotary kiln, and rubbish constantly by heating devices heat, evaporates moisture wherein in the process toward the movement of kiln tail, thus constantly dried, by adjusting the temperature of the heater of rotary kiln, when making rubbish arrive kiln tail, rubbish is dried.Wherein, rotary kiln adds soft seal by wind mechanism, can be good at collecting heat, make rotary kiln in rotation process, rubbish is constantly heated, and the rotary kiln of soft seal by wind mechanism covering is provided with multiple through hole, thus hot blast is constantly blown in rotary kiln, the air-blowing of being heated in continuous rolling of rubbish in rotary kiln is moved, accelerates the rate of drying of rubbish significantly; In addition, in rotary kiln, be provided with raising material unit, better disperseed by raising material unit when rubbish rolls in the rotation with rotary kiln, accelerate the drying rate of rubbish further.Drying unit provided by the invention in whole processing procedure without the discharge of garbage leachate and pollutant, safety non-pollution.
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. a method for Hot-blast Heating house refuse transpiring moisture, is characterized in that, comprises the following steps:
Continue to heat to house refuse, make the temperature of house refuse remain between 100 DEG C-270 DEG C, to evaporate moisture wherein.
2. the method for Hot-blast Heating house refuse transpiring moisture according to claim 1, it is characterized in that, described house refuse is constantly rolled in heating process.
3. a drying unit for the method for the Hot-blast Heating house refuse transpiring moisture according to any one of claim 1-2, it is characterized in that, comprise rotary kiln, the length direction of described rotary kiln is provided with heater.
4. drying unit according to claim 3, is characterized in that, described heater comprises thermal source and the soft seal be enclosed on described rotary kiln is subject to wind mechanism, and described thermal source is connected by pipeline by wind mechanism with described soft seal;
Described soft seal comprises thermal insulation layer and the soft seal layer with described rotary kiln linear contact lay by wind mechanism, and described soft seal is by having space between wind mechanism and described rotary kiln, for passing into the hot gas that described thermal source provides.
5. drying unit according to claim 4, is characterized in that, rotary kiln is horizontal installation, and the gradient of installation is 2-6%.
6. drying unit according to claim 5, it is characterized in that, the length of described rotary kiln is 6-45m, and the diameter of described rotary kiln is 1-5m, the length direction of described rotary kiln arranges a heater every 3-4m, and the temperature of described hot gas is not more than 270 DEG C.
7. drying unit according to claim 6, is characterized in that, the temperature of described hot gas is 150-270 DEG C.
8. the drying unit according to any one of claim 4-7, is characterized in that, described thermal source and described soft seal are provided with air-introduced machine by between wind mechanism, and the rotary kiln position that described soft seal layer covers is provided with multiple through hole.
9. drying unit according to claim 3, is characterized in that, is provided with raising material unit in described rotary kiln, and described raising material unit is for be provided with multiple lifting bucket along described rotary kiln inwall.
10. drying unit according to claim 3, is characterized in that, described drying unit also comprises the cooler, gas-liquid separator and the foul smell decomposition box that are connected successively by pipeline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111043867A (en) * | 2019-10-28 | 2020-04-21 | 鞍钢股份有限公司 | System and method for treating household garbage by utilizing ironmaking waste heat |
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| US5779468A (en) * | 1995-04-11 | 1998-07-14 | Bayer Aktiengesellschaft | Device for supplying gas to rotary kilns |
| CN201032153Y (en) * | 2007-02-07 | 2008-03-05 | 史金麟 | Honeycomb grate incinerator |
| CN101050859A (en) * | 2007-04-17 | 2007-10-10 | 史金麟 | Method for gasifying and burning domestic garbage |
| CN101825391A (en) * | 2009-03-06 | 2010-09-08 | 南通天义环保能源设备有限公司 | Device for drying hydrous waste plastic |
| GB2485180B (en) * | 2010-11-04 | 2012-09-26 | Chinook Sciences Ltd | Improvements in waste processing |
| CN202238868U (en) * | 2011-09-29 | 2012-05-30 | 湖南现代威保特环保科技有限公司 | Harmless dewaterer |
| CN102564115A (en) * | 2011-12-27 | 2012-07-11 | 深圳市盛鑫源环保科技技术有限公司 | Rotary kiln air supply device |
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| CN111043867A (en) * | 2019-10-28 | 2020-04-21 | 鞍钢股份有限公司 | System and method for treating household garbage by utilizing ironmaking waste heat |
| CN111043867B (en) * | 2019-10-28 | 2021-09-14 | 鞍钢股份有限公司 | System and method for treating household garbage by utilizing ironmaking waste heat |
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