DE2353874A1 - Continuous chemical conditioning of sewage sludge - by addn of chemicals to conduit system between pump aggregate and filter press - Google Patents

Continuous chemical conditioning of sewage sludge - by addn of chemicals to conduit system between pump aggregate and filter press

Info

Publication number
DE2353874A1
DE2353874A1 DE19732353874 DE2353874A DE2353874A1 DE 2353874 A1 DE2353874 A1 DE 2353874A1 DE 19732353874 DE19732353874 DE 19732353874 DE 2353874 A DE2353874 A DE 2353874A DE 2353874 A1 DE2353874 A1 DE 2353874A1
Authority
DE
Germany
Prior art keywords
chemicals
filter press
feed pump
suspension
conditioning
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.)
Pending
Application number
DE19732353874
Other languages
German (de)
Inventor
Adrianus Franciscus M Looymans
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.)
F H SCHULE GmbH
Original Assignee
F H SCHULE 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.)
Filing date
Publication date
Application filed by F H SCHULE GmbH filed Critical F H SCHULE GmbH
Publication of DE2353874A1 publication Critical patent/DE2353874A1/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/686—Devices for dosing liquid additives

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Continuous chemical conditioning of sewage sludge is effected by the direct continuous addition of a measured quantity of chemicals to the conduit system between the pump aggregate and the filter press for the mechanical dewatering of the sewage sludge. Compared with conditioning before the pump aggregate, the present method requires less chemicals, as the harmful effect of the pump aggregate on the flocculate is avoided.

Description

Verfahren und Vorrichtung zur Konditionierung von Schiaxuisuspensionen vor ihrer Entwässerung mittels einer Filterpresse Die Erfindung betrifft ein Verfahren zur Konditionierung von Sohlammsuspensionen vor ihrer Entwässerung mittels einer Filterpresse, wobei die Konditionierung durch Zugabe von Chemikalien erfolgt und die Suspension der Filterpresse durch eine Förderpumpe oder dergleichen zugeführt wird. Method and device for conditioning Schiaxu suspensions prior to their dewatering by means of a filter press The invention relates to a method for conditioning of sole lamb suspensions before they are drained by means of a Filter press, whereby the conditioning is carried out by adding chemicals and the suspension is fed to the filter press by a feed pump or the like will.

Insbesondere bei der Entwässerung von kommunalem Abwasserschlamm mittels J?ilterpressen ist es bekannt, den Schlamm vor der Entwässerung durch Zugabe von Chemikalien, wie z.B. Especially when draining municipal sewage sludge By means of filter presses it is known to add the sludge before dewatering of chemicals such as

Kalk oder Eisensalze zu konditionieren, um seine#Entwässerbarkeit zu verbessern. Bei den bisher bekannten Verfahren werden hierzu Konditionierungsbehälter verwendet, in denen der Schlamm mit den Chemikalien vermischt wird, und aus denen er, gegebenenfalls nach einer gewissen Verweilzeit, mittels einer Förderpumpe zur Filterpresse gefördert wird.To condition lime or iron salts in order to be # drainable to improve. In the previously known methods, conditioning containers are used for this purpose used in which the sludge is mixed with the chemicals, and out of which he, if necessary after a certain dwell time, by means of a feed pump to Filter press is promoted.

Die Erfindung beruht auf der Feststellung, daß die mechanische Beanspruchung des Schlamms durch die Förderpumpe einen nachteiligen Einfluß auf die bei der Konditionierung entstehenden Flocken hat. Zur Erzielung einer merklichen Verbesserung der Entwässerbarkeit sind deshalb relativ große Chemikalienmengen erforderlich.The invention is based on the finding that the mechanical stress of the sludge through the feed pump has an adverse effect on the conditioning resulting flakes. To achieve a noticeable improvement in drainability therefore, relatively large amounts of chemicals are required.

Aufgabe der Erfindung ist es, die Wirksamkeit einer derartigen Konditionierung zu verbessern und eine Ersparnie an Chemikalien zu erzielen. The object of the invention is to improve the effectiveness of such conditioning to improve and to save chemicals.

Diese Aufgabe-wird gemäß der Erfindung dadurch gelöst, daß die Chemikalien direkt in den der Filterpresse zuströmenden Strom der Suspension stromab der Förderpumpe zugemischt werden und daß die Zumischung in Abhängigkeit von der Durchflußge schvindigkeit mit der Suspension gesteuert wird. Die Erfindung schafft ein sogenanntes Inline-Eonditionierungsverfahren, bei dem eine gewünschte Leistungsverbesserung der Filterpresse und Herabsetzung der Restfeuchte des Filterkuchens mit geringerem Chemikalien erreicht werden kann als bei den bekannten verbrauch Verfahreh. This object is achieved according to the invention in that the chemicals directly into the flow of the suspension flowing into the filter press, downstream of the feed pump are admixed and that the admixture speed depending on the Durchflußge is controlled with the suspension. The invention creates a so-called inline conditioning method, in which a desired performance improvement and degradation of the filter press the residual moisture of the filter cake can be achieved with fewer chemicals than with the known consumption procedures.

Vorzugsweise erfolgt die Zumischung der Chemikalien unter Rühren, und die Intensität des R~uhrens und/oder die Menge der zudosierten Chemikalien wird in kbhängigkeit von der Durchflußmenge der Suspension gesteuert. The chemicals are preferably added with stirring, and the intensity of the stirring and / or the amount of chemicals added controlled as a function of the flow rate of the suspension.

Die Erfindung betrifft auch#eine Einrichtung zur Durchführung des genannten Verfahrens, mit einer Filterpresse, einer Förderpumpe und einer Zugabevorrichtung für Chemikalien. Eine solche Einrichtung ist erfindungsgemäß dadurch gekennzeichnet, daß die Zugabevorrichtung mindestens ein in der Leitung zwischen Förderpumpe und Filterpresse angeordnetes Mischgefäß mit Rührwerk und Dosiereinrichtung für Chemikalien aufweist, daß in der Leitung ein flurchflußmengenmesser angeordnet ist und daß eine auf den Durchflußmengenmesser ansprechende und die Drehzahl des Rührwerks -und/oder die Dosierungseinrichtung steuernde Steuervorrichtung vorgesehen ist. The invention also relates to a device for performing the called method, with a filter press, a feed pump and an adding device for chemicals. According to the invention, such a device is characterized in that that the adding device at least one in the line between the feed pump and Filter press arranged mixing vessel with agitator and dosing device for chemicals has that a flow meter is arranged in the line and that a responsive to the flow meter and the speed of the Agitator and / or the control device controlling the dosing device is provided.

Eine dusführungsfarm einer erfindungsgemäßen Einrichtung ist in der Zeichnung schematisch dargestellt. A dusführungfarm a device according to the invention is in the Drawing shown schematically.

Die zu entwässernde Schlammsuspension wird aus einem Schlamm eindicker 1 über ein Förderpumpenaggregat 2 einer Filterpresse 6 zugeführt. Zwischen dem Pumpenaggregat und der Filterpresse durch strömt die Suspension 2 Inline-Nischgefäße 4 und 5, die mit einem Rührwerk ausgerüstet sind. In den Nischgefäßen 4 und 5 erfolgt die Zudosierung von Chemikalien mittels Dosierpumpen 7,8. The sludge suspension to be dewatered is thickened from a sludge 1 is fed to a filter press 6 via a feed pump unit 2. Between the pump set and the filter press flows through the suspension 2 inline mixing vessels 4 and 5, the are equipped with an agitator. The metering takes place in the niche vessels 4 and 5 of chemicals using metering pumps 7,8.

Unmittelbar stromab des Fumpenaggregates 2 ist in der Leitung ein Durchflußmengenmesser 3 angeordnet, der ein Meßsignal an eine vorzugsweise elektronisch mit Tyristoren arbeitende Steuereinheit 9 gibt. Diese steuert in Abhängigkeit von der angezeigten Durchflußmenge#sowohl die Drehzahlen der Rührwerke als auch die Dosiermengen der Dosierpumpen 7,8.Immediately downstream of the pump unit 2 is a in the line Flow meter 3 arranged, which sends a measurement signal to a preferably electronic there is a control unit 9 operating with thyristors. This controls depending on the indicated flow rate # both the speeds of the agitators and the Dosing quantities of the dosing pumps 7,8.

Claims (4)

Patent ansprüche Patent claims Verfahren zur Konditionierung von Schlaminsuspensionen vor ihrer Entwässerung mit einer Filterpresse, wobei die Konditionierung durch Zugabe von Chemikalien erfolgt und die Suspension der Filterpresse durch eine Förderpumpe od.dgl. zugeführt wird, dadurch g e k e n n z e i c h n e t, daß die Chemikalien direkt in den der Filterpresse zuströmenden Strom der Suspension stromab der Förderpumpe zugemischt werden und daß die Zumischung in Abhängigkeit von der Durchflußgeschwinligkeit der Suspension gesteuert wird.Procedure for conditioning sludge suspensions prior to their drainage with a filter press, conditioning by adding chemicals and the suspension of the filter press by a feed pump or the like. is supplied, It is noted that the chemicals are fed directly into the filter press inflowing stream of the suspension are admixed downstream of the feed pump and that the admixture depends on the flow rate of the suspension is controlled. 2. Verfahren nach Anspruch 1, dadurch g e k e n n z e i c h -n e t, daß die Zumischung der Chemikalien unter Rühren erfolgt und daß die Intensität des Rührens und/oder die Menge der zudosierten Chemikalien in Abhängigkeit von der Durchflußgeschwindigkeit der Suspension gesteuert wird.2. The method according to claim 1, characterized in that g e k e n n z e i c h -n e t, that the admixing of the chemicals takes place with stirring and that the intensity of the Stirring and / or the amount of chemicals added depending on the flow rate the suspension is controlled. 3. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, mit einer Filterpresse, mit einer Förderpumpe und einer Zugabevorrichtung fur Chemikalien, dadurch g e k e n n z e i c h -n e t, daß die Zugabevorrichtung mindestens ein in der Leitung zwischen Förderpumpe (2) und Filterpresse (6) angeordnetes Mischgefäß (4, 5) mit Rührwerk und Dosiereinrichtung (7, 8) für Chemikalien aufweist, daß in der Leitung ein Durchflußmengenmesser (3) angeordnet ist und daß eine auf den Durchflußmengenmesser ansprechende und die Drehzahl des Rührwerks und/oder die Dosiereinrichtung steuernde Steuervorrichtung (9) vorgesehen ist.3. Device for performing the method according to claim 1 or 2, with a filter press, with a feed pump and an adding device for Chemicals, in that the adding device at least a mixing vessel arranged in the line between the feed pump (2) and the filter press (6) (4, 5) with agitator and metering device (7, 8) for chemicals has that in a flow meter (3) in the line is arranged and that a responsive to the flow meter and the speed of the agitator and / or the control device (9) controlling the metering device is provided. 4. Einrichtung nach Anspruch 3, dadurch g e k e n n z e i c h -n e t, daß der Durchflußmengenmesser (3) zwischen der Förderpumpe (2) und dem Mischgefäß (4) angeordnet ist.4. Device according to claim 3, characterized in that g e k e n n z e i c h -n e t that the flow meter (3) between the feed pump (2) and the mixing vessel (4) is arranged. LeerseiteBlank page
DE19732353874 1972-10-26 1973-10-26 Continuous chemical conditioning of sewage sludge - by addn of chemicals to conduit system between pump aggregate and filter press Pending DE2353874A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7214504A NL7214504A (en) 1972-10-26 1972-10-26

Publications (1)

Publication Number Publication Date
DE2353874A1 true DE2353874A1 (en) 1974-05-30

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DE (1) DE2353874A1 (en)
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351689A1 (en) * 1976-05-21 1977-12-16 English Clays Lovering Pochin IMPROVED PROCESS FOR THE REMOVAL OF WATER FROM SOLIDS IN FINE PARTICLES
FR2373491A1 (en) * 1976-12-13 1978-07-07 Kuebler Hans METHOD AND DEVICE FOR PURIFYING WASTE WATER
FR2407174A1 (en) * 1977-10-25 1979-05-25 Somat Corp PROCESS AND PLANT FOR SLUDGE TREATMENT
WO1985002836A1 (en) * 1983-12-23 1985-07-04 Allied Colloids Manufacturing Gmbh Process and plant for dehydrating muds
EP0172649A2 (en) * 1984-07-26 1986-02-26 Water Research Centre Dewatering solids suspensions
WO1986004585A1 (en) * 1985-01-31 1986-08-14 Sulzer-Escher Wyss Gmbh Process and system for the flocculation substances which can be flocculated in suspensions, especially for cleaning the discharge water of deinking plant
US4659483A (en) * 1984-07-18 1987-04-21 Netzsch-Mohnopumpen Gmbh Method of and a means for feeding material to a filtering apparatus
DE3743429A1 (en) * 1986-12-22 1988-07-14 Passavant Werke Process and device for conditioning and subsequently draining sludge
DE3743430A1 (en) * 1986-12-22 1988-07-14 Passavant Werke Process and device for conditioning and subsequently draining sludges
EP0476668A1 (en) * 1990-09-20 1992-03-25 Passavant-Werke Ag Method and device for conditioning and subsequent dewatering of sludges
FR2782317A1 (en) * 1998-08-14 2000-02-18 Degremont Dewatering plant for sludges leaving waste water treatment plant, receives batch feed in accordance with filter press demand and includes drainage, constriction, cyclonic mixing and additive dosing stages
US6808305B2 (en) 2002-03-25 2004-10-26 Sharpe Mixers, Inc. Method and apparatus for mixing additives with sludge in a powered line blender

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351689A1 (en) * 1976-05-21 1977-12-16 English Clays Lovering Pochin IMPROVED PROCESS FOR THE REMOVAL OF WATER FROM SOLIDS IN FINE PARTICLES
FR2373491A1 (en) * 1976-12-13 1978-07-07 Kuebler Hans METHOD AND DEVICE FOR PURIFYING WASTE WATER
FR2407174A1 (en) * 1977-10-25 1979-05-25 Somat Corp PROCESS AND PLANT FOR SLUDGE TREATMENT
WO1985002836A1 (en) * 1983-12-23 1985-07-04 Allied Colloids Manufacturing Gmbh Process and plant for dehydrating muds
EP0151747A1 (en) * 1983-12-23 1985-08-21 Allied Colloids Manufacturing Gmbh Process and apparatus for sewage sludge dewatering
US4659483A (en) * 1984-07-18 1987-04-21 Netzsch-Mohnopumpen Gmbh Method of and a means for feeding material to a filtering apparatus
EP0172649A3 (en) * 1984-07-26 1986-06-04 Water Research Centre Dewatering solids suspensions
EP0172649A2 (en) * 1984-07-26 1986-02-26 Water Research Centre Dewatering solids suspensions
US4675116A (en) * 1984-07-26 1987-06-23 Water Research Centre Dewatering solids suspensions with controlled flocculant addition
WO1986004585A1 (en) * 1985-01-31 1986-08-14 Sulzer-Escher Wyss Gmbh Process and system for the flocculation substances which can be flocculated in suspensions, especially for cleaning the discharge water of deinking plant
DE3743429A1 (en) * 1986-12-22 1988-07-14 Passavant Werke Process and device for conditioning and subsequently draining sludge
DE3743430A1 (en) * 1986-12-22 1988-07-14 Passavant Werke Process and device for conditioning and subsequently draining sludges
EP0476668A1 (en) * 1990-09-20 1992-03-25 Passavant-Werke Ag Method and device for conditioning and subsequent dewatering of sludges
US5366622A (en) * 1990-09-20 1994-11-22 Passavant-Werke Ag Procedure and installation for conditioning and subsequent dewatering of sludge
FR2782317A1 (en) * 1998-08-14 2000-02-18 Degremont Dewatering plant for sludges leaving waste water treatment plant, receives batch feed in accordance with filter press demand and includes drainage, constriction, cyclonic mixing and additive dosing stages
WO2000009454A1 (en) * 1998-08-14 2000-02-24 Degremont Sludge dehydrating device
US6808305B2 (en) 2002-03-25 2004-10-26 Sharpe Mixers, Inc. Method and apparatus for mixing additives with sludge in a powered line blender
US7014775B2 (en) 2002-03-25 2006-03-21 Sharpe Mixers, Inc. Method for mixing additives with sludge in a powered line blender

Also Published As

Publication number Publication date
NL7214504A (en) 1974-05-01

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