CA2541737A1 - Apparatus and method for treating sludge - Google Patents

Apparatus and method for treating sludge Download PDF

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Publication number
CA2541737A1
CA2541737A1 CA002541737A CA2541737A CA2541737A1 CA 2541737 A1 CA2541737 A1 CA 2541737A1 CA 002541737 A CA002541737 A CA 002541737A CA 2541737 A CA2541737 A CA 2541737A CA 2541737 A1 CA2541737 A1 CA 2541737A1
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CA
Canada
Prior art keywords
press
sludge
operational parameter
shredder
compaction device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002541737A
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French (fr)
Other versions
CA2541737C (en
Inventor
Jesper Christopherson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nordic Water Products AB
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2541737A1 publication Critical patent/CA2541737A1/en
Application granted granted Critical
Publication of CA2541737C publication Critical patent/CA2541737C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B30B9/163—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms working in different chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/125—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/128—Vertical or inclined screw presses

Abstract

An apparatus for treating sludge comprises a press (3) for dewatering the sludge, a compaction device (10) for receiving and compacting sludge dewatered by the press, a shredder (23) for receiving and shredding sludge compacted by the compaction device, and a tube conveyor (30) for conveying shredded sludge from the shredder. As a result, it is possible to dewater the sludge to a high degree of dryness at the same time as the dewatered sludge can be transported in the tube conveyor over considerable distances and at any inclination to the horizontal.

Claims (60)

1. An apparatus for treating sludge, comprising a press (3) for dewatering the sludge, a compaction device (10) for receiving and compacting sludge dewatered by the press, and a tube conveyor (11) for conveying sludge from the compaction device, characterised by a shredder (12;23) provided in the tube conveyor (11) and adapted to shred the sludge compacted by the compaction device (10).
2. An apparatus according to claim 1, wherein the tube conveyor (10) comprises a transport screw (28).
3. An apparatus according to claim 2, wherein the transport screw (28) has an upstream end and a downstream end, the shredder (23) being situated at the upstream end.
4. An apparatus according to claim 3, wherein the transport screw (28) and the shredder (23) are integrated.
5. An apparatus according to claim 4, wherein the transport screw (28) comprises a helically extending element having a peripheral edge, and the shredder (23) is formed on the peripheral edge.
6. An apparatus according to claim 3, further comprising a conical tip (18;22) centrally attached to the transport screw at the upstream end thereof.
7. An apparatus according to claim 3, further comprising at least one additional shredder (24) situated downstream of the first-mentioned shredder (23).
8. An apparatus according to claim 7, further comprising a discharge outlet (27) for discharging sludge from the tube conveyor (32) at the downstream end of the transport screw (28), wherein the additional shredder (24) is situated at the discharge outlet (27).
9. An apparatus according to claim 8, wherein the additional shredder (24) comprises a stationary (25) and/or rotary knife (26).
10. An apparatus according to claim 7, wherein the transport screw (28) comprises a helically extending element having a cut-away portion between the upstream and downstream ends of the transport screw, and the additional shredder (24) extends in the cut-away portion.
11. An apparatus according to any one of claims 1-10, further comprising a washing device (7) for introducing a wash liquid into the sludge existing in the press to mix with the sludge and effect washing thereof.
12. An apparatus according to claim 11, wherein the washing device (7) is operable to cyclically introduce wash liquid in batches.
13. An apparatus according to claim 12, wherein the press (3) is operable to decrease the pressure exerted on the sludge while the washing device (7) introduces wash liquid.
14. An apparatus according to any one of claims 1-13, further comprising a control unit (36;47) adapted to control the press (3).
15. An apparatus according to claim 14, wherein the control unit (36;47) is adapted to control the press (3) to transport the sludge at a controlled flow rate to or from the compaction device (10).
16. An apparatus according to claim 15, wherein the control unit (36;47) is adapted to control the press (3) to vary the flow rate of the sludge leaving the press in response to at least one sensed operational parameter of the press.
17. An apparatus according to claim 16, wherein the operational parameter comprises the momentary power for operating the press (3), pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.
18. An apparatus according to claim 16, wherein the press (3) comprises a press motor (1) for driving it and the operational parameter comprises the momentary power consumption of the press motor.
19. An apparatus according to claim 18, wherein the press (3) comprises a press screw (4) and a drive shaft (19) connecting the motor (1) and press screw, and the operational parameter comprises the torque of the drive shaft.
20. An apparatus according to claim 14, wherein the control unit (36;47) is adapted to control the press (3) to vary the flow rate of the sludge in response to at least one sensed operational parameter of the compaction device (10).
21. An apparatus according to claim 20, wherein the operational parameter comprises the pressure in the sludge in the compaction device (10), or sludge concentration in the compaction device.
22. An apparatus according to claim 14,, wherein the control unit (36;47) is adapted to control the operation of the shredder (23).
23. An apparatus according to claim 22, wherein the control unit (36;47) is adapted to control the operation of the shredder (12) in response to at least one sensed operational parameter of the press (3).
24. An apparatus according to claim 23, wherein the operational parameter comprises the momentary power for operating the press (3), pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.
25. An apparatus according to claim 23, wherein the press (3) comprises a press motor (1) for driving it and the operational parameter comprises the momentary power consumption of the press motor.
26. An apparatus according to claim 16, wherein the press (3) comprises a press motor (1), a press screw (4) and a drive shaft (19) connecting the motor and press screw, and the operational parameter comprises the torque of the drive shaft.
27. An apparatus according to claim 22, wherein the control unit (36;47) is adapted to control the operation of the shredder (23) in response to at least one sensed operational parameter of the compaction device (10).
28. An apparatus according to claim 27, wherein the operational parameter comprises the pressure in the sludge in the compaction device (10), or sludge concentration in the compaction device.
29. An apparatus according to claim 14, wherein the tube conveyor (30) comprises a transport screw (28) and the control unit (36;47) controls the rotational speed of the transport screw in response to at least one sensed operational parameter of the press (3).
30. An apparatus according to claim 29, wherein the operational parameter comprises the momentary power for operating the press (3).
31. An apparatus according to claim 29, wherein the operational parameter comprises the pressure, concentration or viscosity of the sludge in the press (3).
32. An apparatus according to any one of claims 1-13, further comprising a time sequence controller (35;46) adapted to control the press (3) to operate in cycles.
33. An apparatus according to any one of claims 1-13, further comprising a time sequence controller (35;46) adapted to control the shredder and/or tube conveyor to operate in cycles.
34. A method of treating sludge, comprising the steps of:
dewatering the sludge, compacting the dewatered sludge, shredding the compacted sludge, transporting the shredded sludge in a closed channel, and discharging the sludge from the channel.
35. A method according to claim 34, further comprising shredding the- sludge at least once more as the sludge is transported in the channel.
36. A method according to claim 34, further comprising shredding the sludge once more just before the sludge is discharged from the channel.
37. A method according to claim 34, further comprising washing the sludge at the same time as it is dewatered.
38. A method according to claim 37, wherein the sludge is washed in cycles.
39. A method according to clam 34, further comprising providing a press (3) for performing the dewatering step and a compaction device (10) for performing the compacting step, and controlling the press to transport the sludge at a controlled flow rate to or from the compaction device.
40. A method according to claim 39, further comprising controlling the press (3) to vary the flow rate of the sludge in response to at least one sensed operational parameter of the press.
41. A method according to claim 40, wherein the operational parameter comprises the momentary power for operating the press (3), pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.
42. A method according to claim 40, wherein the press (3) comprises a press motor (1) for driving it and the operational parameter comprises the momentary power consumption of the press motor (1).
43. A method according to claim 42, wherein the press (3) comprises a press screw (4) and a drive shaft (19) connecting the motor (1) and press screw, and the operational parameter comprises the torque of the drive shaft.
44. A method according to claim 39, further comprising controlling the press (3) to vary the flow rate of the sludge in response to at least one sensed operational parameter of the compaction device (10).
45. A method according to claim 44, wherein the operational parameter comprises the pressure in the sludge in the compaction device (10), or sludge concentration in the compaction device.
46. A method according to claim 39, further comprising providing a shredder (12;23) for performing the shredding step, and controlling the operation of the shredder.
47. A method according to claim 46, further comprising controlling the operation of the shredder (12;23) in response to at least one sensed operational parameter of the press (3).
48. A method according to claim 47, wherein the operational parameter comprises the momentary power for operating the press (3), pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.
49. A method according to claim 47, wherein the press comprises a press motor (1) for driving it and the operational parameter comprises the momentary power consumption of the press motor.
50. A method according to claim 47, wherein the press (3) comprises a press motor (1), a press screw (4) and a drive shaft (19) connecting the motor (1) and press screw, and the operational parameter comprises the torque of the drive shaft.
51. A method according to claim 46, further comprising controlling the operation of the shredder (23) in response to at least one sensed operational parameter of the compaction device (10).
52. A method according to claim 51, wherein the operational parameter comprises the pressure in the sludge in the compaction device (10), or sludge concentration in the compaction device.
53. A method according to claim 39, further comprising providing a transport screw (28) in the closed channel for performing the transporting step, and controlling the rotational speed of the transport screw in response to at least one sensed operational parameter of the press (3).
54. A method according to claim 53, wherein the operational parameter comprises the momentary power for operating the press (3).
55. A method according to claim 53, wherein the operational parameter comprises the pressure, concentration or viscosity of the sludge in the press (3).
56. A method according to claim 39, further comprising controlling the press (3) to operate in cycles.
57. A method according to claim 46, further comprising controlling the shredder (23) to operate in cycles.
58. A method according to claim 53, further comprising controlling the transport screw (28) to operate in cycles.
59. A method according to claim 46, wherein the shredded sludge is transported in a direction upwardly from the shredder (23) and the sludge is discharged from the channel in a position above the shredder.
60. A method according to claim 53, wherein the transport screw (28) is adapted to convey the shredded sludge in a direction upwardly in the channel.
CA2541737A 2003-10-15 2004-10-13 Apparatus and method for treating sludge Expired - Fee Related CA2541737C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US51110603P 2003-10-15 2003-10-15
US60/511,106 2003-10-15
PCT/SE2004/001463 WO2005037532A1 (en) 2003-10-15 2004-10-13 Apparatus and method for treating sludge

Publications (2)

Publication Number Publication Date
CA2541737A1 true CA2541737A1 (en) 2005-04-28
CA2541737C CA2541737C (en) 2011-03-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2541737A Expired - Fee Related CA2541737C (en) 2003-10-15 2004-10-13 Apparatus and method for treating sludge

Country Status (12)

Country Link
US (2) US7335311B2 (en)
EP (1) EP1673214B1 (en)
JP (1) JP5213331B2 (en)
AU (1) AU2004281244B8 (en)
CA (1) CA2541737C (en)
DK (1) DK1673214T3 (en)
ES (1) ES2420580T3 (en)
NO (1) NO338634B1 (en)
PL (1) PL1673214T3 (en)
RU (1) RU2355578C2 (en)
UA (1) UA90096C2 (en)
WO (1) WO2005037532A1 (en)

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CN115321784A (en) * 2022-07-13 2022-11-11 安徽美琛生态科技有限公司 A recovery unit for sludge squeezing dewatering

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115321784A (en) * 2022-07-13 2022-11-11 安徽美琛生态科技有限公司 A recovery unit for sludge squeezing dewatering
CN115321784B (en) * 2022-07-13 2024-02-23 安徽美琛生态科技有限公司 Recovery device for sludge squeezing and dewatering

Also Published As

Publication number Publication date
EP1673214A1 (en) 2006-06-28
NO20061893L (en) 2006-07-13
US7410568B2 (en) 2008-08-12
RU2006116490A (en) 2007-11-20
ES2420580T3 (en) 2013-08-26
CA2541737C (en) 2011-03-08
RU2355578C2 (en) 2009-05-20
JP2007508139A (en) 2007-04-05
AU2004281244B2 (en) 2009-03-19
PL1673214T3 (en) 2013-10-31
NO338634B1 (en) 2016-09-19
UA90096C2 (en) 2010-04-12
DK1673214T3 (en) 2013-07-15
AU2004281244A1 (en) 2005-04-28
EP1673214B1 (en) 2013-04-17
AU2004281244B8 (en) 2009-08-06
US20080099384A1 (en) 2008-05-01
US7335311B2 (en) 2008-02-26
US20050092694A1 (en) 2005-05-05
WO2005037532A1 (en) 2005-04-28
JP5213331B2 (en) 2013-06-19
PL1673214T1 (en) 2010-06-07

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