EP0480176A1 - Procédé pour la dèshydratation sous pression de boues aqueuses - Google Patents

Procédé pour la dèshydratation sous pression de boues aqueuses Download PDF

Info

Publication number: EP0480176A1
Authority: EP; European Patent Office
Prior art keywords: piston; sludge; pressure; chamber; filter
Prior art date: 1990-10-10
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

EP91115039A

Other languages

German (de)

English (en)

Other versions

EP0480176B1 (fr

Inventor

Wolfgang Dipl.-Ing. Müller

Dirk Dipl.-Ing. Herzog

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.)

Mueller Umwelttechnik & Co KG GmbH

Original Assignee

Mueller Umwelttechnik & Co KG GmbH

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.)

1990-10-10

Filing date

1991-09-06

Publication date

1992-04-15

1991-09-06 Application filed by Mueller Umwelttechnik & Co KG GmbH filed Critical Mueller Umwelttechnik & Co KG GmbH

1992-04-15 Publication of EP0480176A1 publication Critical patent/EP0480176A1/fr

1994-08-17 Application granted granted Critical

1994-08-17 Publication of EP0480176B1 publication Critical patent/EP0480176B1/fr

2011-09-06 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 34
239000010802 sludge Substances 0.000 claims abstract description 67
239000012065 filter cake Substances 0.000 claims description 5
239000000706 filtrate Substances 0.000 claims description 5
230000003993 interaction Effects 0.000 claims description 2
230000006835 compression Effects 0.000 claims 1
238000007906 compression Methods 0.000 claims 1
238000006073 displacement reaction Methods 0.000 claims 1
239000002002 slurry Substances 0.000 claims 1
230000007704 transition Effects 0.000 claims 1
238000001914 filtration Methods 0.000 abstract 4
238000010521 absorption reaction Methods 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping
- 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
- B30B9/04—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 press rams
- B30B9/06—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 press rams co-operating with permeable casings or strainers

Definitions

the invention relates to a method according to the type mentioned in the preamble of the main claim.
the receiving chamber for the sludge has a closable cover on one end face, which can be opened for pushing out the filter cake, and in the fresh raw sludge on the opposite end face of the receiving chamber is fed.
a disadvantage of this method is that it runs discontinuously and no further dewatering takes place on the extension side during the extension stroke. and on the other hand that the freshly supplied raw sludge must pass through already dewatered filter cake, or part of it, and push the plunger in front of it, whereby the sludge always gets onto filter surfaces that have already been used, which leads to problematic sludge that can clog the filter openings that the process has to be stopped and the entire batch has to be pumped back.
the present invention has for its object to provide a method in which the sludge is dewatered during each piston stroke without having to reduce the working pressure of the sludge pump and in which the freshly supplied raw sludge is constantly provided with a clean filter surface.
a particular advantage of this process is that the fresh raw sludge can be fed directly behind the moving piston, whereby the piston frees the coated filter surfaces of the filter cartridges from adhering sludge deposits that close the very small filter openings, so that the pumped-in sludge always has a clean filter surface is available.
the double-acting piston offers the advantage of realizing this type of sludge feed in both directions of movement of the piston, which means that the process can be carried out virtually continuously and there is sludge dewatering in both chambers in every operating state.
the homogeneity of the sludge cake is also advantageous, since the process is designed in such a way that the sludge layers building up behind the piston are discharged again in approximately the same chronological order of their formation, and a sludge cake with the same moisture distribution is thus produced.
FIG. 1 A drawing of an exemplary embodiment of a device for carrying out the method, FIG. 1.
the receiving chamber 25 for example into chamber I, with raw sludge mixed with flocculant via the pump 5 through the opened valve 1, the sludge feed line 7 and the telescopic pipe 29 pumped in.
the piston 8 is pushed up to a mechanical stop in the direction of the empty chamber 11, which is constantly reduced. Once he has reached this, raw sludge continues to be added until the desired operating pressure is reached.
the resulting filtrate 30 flows through the filter candles 12 into the collecting containers 13, 14 arranged in the container lids 17, 18 and is then discharged via the outlets 15, 16.
valve 1 closes and valve 2 opens, so that the fresh one Raw sludge 21 passes through the valve 2, the sludge feed line 9 and the telescopic tube 28 into the chamber 11 until operating pressure is also reached there.
the pressure in the chamber I not loaded with raw sludge is now generated by the piston 8 and is maintained by the fact that the discharge opening 11 provided with the discharge nozzle 27 is closed by a valve 3.
valve 3 opens until it has dropped to a lower, likewise predetermined, minimum level, after which the pressure continues to build up to its maximum due to the moving piston, which can be less than or at most equal to the maximum working pressure of the mud pump 6, and the interplay continues as long continues until the piston 8 has reached an end position and can no longer push out another sludge cake through the discharge opening 11 into the discharge nozzle 27 and through the valve 3 into the collecting container 23 provided.
the valve 2 is then closed and the valve 1 is opened, and the process continues in the same way in the reverse order, with intermittent operation not being excluded if longer holding times are to be achieved.
the fresh raw sludge 21 is pumped through the valve 1 via the sludge line 7 and the telescopic tube 29 into the chamber I, the sludge being pre-dewatered and the piston 8 dewatering the pre-dewatered sludge located in chamber 11, also pressure-controlled in batches via a valve 4 provided discharge opening 10 in the collecting container 24 from the chamber 11.
the piston 8 reaches different end positions in the receiving chamber 25, since it runs up against the cone-shaped sludge deposits 22 forming the discharge openings 10, 11.
the sludge is supplied via telescopic tubes 28, 29, which are guided centrally from both end faces of the receiving chamber 25 through the container lids 17, 18 and the discharge openings 10, 11 along their central axes, the tubes being fastened to one side of the piston and preferably close to the piston provided outflow openings 26, 27 are provided for the raw sludge 21.
the outer wall of the cylindrical receiving chamber 25 in the bottom area or over the entire circumference with a filter layer similar to the filter candles 12 with a filter layer surrounding it at a low height is also required to subsequently enlarge the filter area and with the collecting containers 13, 14 in connection with the annular space for increased absorption of further filtrate 21.
the sides of the piston 8 facing the chambers I, 11 are equipped with further sieve-like filter surfaces to further enlarge the filter area and the process efficiency, at least in the piston 8 a drain for the filtrate is provided.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Health & Medical Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Molecular Biology (AREA)
General Engineering & Computer Science (AREA)
Treatment Of Sludge (AREA)
Processing Of Solid Wastes (AREA)

EP91115039A 1990-10-10 1991-09-06 Procédé pour la dèshydratation sous pression de boues aqueuses Expired - Lifetime EP0480176B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4032145A DE4032145C1 (fr)	1990-10-10	1990-10-10
DE4032145		1990-10-10

Publications (2)

Publication Number	Publication Date
EP0480176A1 true EP0480176A1 (fr)	1992-04-15
EP0480176B1 EP0480176B1 (fr)	1994-08-17

Family

ID=6416009

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP91115039A Expired - Lifetime EP0480176B1 (fr)	1990-10-10	1991-09-06	Procédé pour la dèshydratation sous pression de boues aqueuses

Country Status (5)

Country	Link
EP (1)	EP0480176B1 (fr)
AT (1)	ATE110024T1 (fr)
DE (2)	DE4032145C1 (fr)
DK (1)	DK0480176T3 (fr)
ES (1)	ES2057690T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0587080A1 (fr) *	1992-09-11	1994-03-16	Nagaoka International Corporation	Presse de déshydration des boues et procédé de traitement des boues
EP0663227A1 (fr) *	1994-01-12	1995-07-19	Nagaoka International Corporation	Presse de déshydratation des boues et procédé de traitement des boues
DE19947044A1 (de) *	1999-09-30	2001-05-17	Osram Opto Semiconductors Gmbh	Oberflächenmontierbares optoelektronisches Bauelement mit Reflektor und Verfahren zur Herstellung desselben
CN117398745A (zh) *	2023-07-18	2024-01-16	水利部交通运输部国家能源局南京水利科学研究院	基于扩大管内置抽滤装置的低浓度泥浆脱水装置及方法
CN119977274A (zh) *	2025-04-16	2025-05-13	浙江浙达水业有限公司	一种具有反冲洗防堵结构的污水处理用排泥设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4223503A1 (de) *	1992-07-17	1994-01-20	Mueller Umwelttechnik	Verfahren und Vorrichtung zur Entsorgung von Öl oder sonstiges Fett enthaltenden Schlämmen
ITRM980190A1 (it) *	1998-03-25	1998-06-25	Gioia Antonio La	Essiccatore copattatore a gabbia
DE102009008904A1 (de) *	2009-02-13	2010-09-02	Gosatec Gmbh	Vorrichtung und Verfahren zur Flüssigkeitsseparation
AT508024B1 (de) *	2009-06-18	2010-10-15	Celtec Gmbh	Vorrichtung zum abtrennen grober feststoffe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE198415C (fr) *	1905-12-26
DE249275C (fr) *
DE263722C (fr) *	1912-04-06	1913-09-09	Roth Philipp
DE1035101B (de) *	1955-05-25	1958-07-31	Dr Hans Heymann	Filterpresse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3641180A1 (de) *	1986-12-02	1988-06-16	Mueller Umwelttechnik	Vorrichtung zur druckentwaesserung von waessrigen schlaemmen
DK158149C (da) *	1987-03-31	1990-08-27	Optimal Miljoeteknik Aps	Apparat til afvanding af slam

1990
- 1990-10-10 DE DE4032145A patent/DE4032145C1/de not_active Expired - Fee Related
1991
- 1991-09-06 EP EP91115039A patent/EP0480176B1/fr not_active Expired - Lifetime
- 1991-09-06 DK DK91115039.9T patent/DK0480176T3/da active
- 1991-09-06 ES ES91115039T patent/ES2057690T3/es not_active Expired - Lifetime
- 1991-09-06 DE DE59102559T patent/DE59102559D1/de not_active Expired - Fee Related
- 1991-09-06 AT AT91115039T patent/ATE110024T1/de not_active IP Right Cessation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE249275C (fr) *
DE198415C (fr) *	1905-12-26
DE263722C (fr) *	1912-04-06	1913-09-09	Roth Philipp
DE1035101B (de) *	1955-05-25	1958-07-31	Dr Hans Heymann	Filterpresse

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0587080A1 (fr) *	1992-09-11	1994-03-16	Nagaoka International Corporation	Presse de déshydration des boues et procédé de traitement des boues
AU666214B2 (en) *	1992-09-11	1996-02-01	Nagaoka International Corporation	Sludge dehydrating press and method for treating sludge
EP0663227A1 (fr) *	1994-01-12	1995-07-19	Nagaoka International Corporation	Presse de déshydratation des boues et procédé de traitement des boues
US5643458A (en) *	1994-01-12	1997-07-01	Nagaoka International Corporation	Sludge dehydrating press and method for treating sludge
DE19947044A1 (de) *	1999-09-30	2001-05-17	Osram Opto Semiconductors Gmbh	Oberflächenmontierbares optoelektronisches Bauelement mit Reflektor und Verfahren zur Herstellung desselben
CN117398745A (zh) *	2023-07-18	2024-01-16	水利部交通运输部国家能源局南京水利科学研究院	基于扩大管内置抽滤装置的低浓度泥浆脱水装置及方法
CN119977274A (zh) *	2025-04-16	2025-05-13	浙江浙达水业有限公司	一种具有反冲洗防堵结构的污水处理用排泥设备

Also Published As

Publication number	Publication date
DE4032145C1 (fr)	1992-01-16
DK0480176T3 (da)	1994-12-05
DE59102559D1 (de)	1994-09-22
EP0480176B1 (fr)	1994-08-17
ES2057690T3 (es)	1994-10-16
ATE110024T1 (de)	1994-09-15

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