EP0443382B1 - Verfahren zum Reinigen des Filtermittels einer Filterzentrifuge - Google Patents

Verfahren zum Reinigen des Filtermittels einer Filterzentrifuge Download PDF

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Publication number
EP0443382B1
EP0443382B1 EP91101733A EP91101733A EP0443382B1 EP 0443382 B1 EP0443382 B1 EP 0443382B1 EP 91101733 A EP91101733 A EP 91101733A EP 91101733 A EP91101733 A EP 91101733A EP 0443382 B1 EP0443382 B1 EP 0443382B1
Authority
EP
European Patent Office
Prior art keywords
filter
drum
centrifuge
liquid
base layer
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.)
Expired - Lifetime
Application number
EP91101733A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0443382A1 (de
Inventor
Siegfried Pöschl
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
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 Krauss Maffei AG filed Critical Krauss Maffei AG
Publication of EP0443382A1 publication Critical patent/EP0443382A1/de
Application granted granted Critical
Publication of EP0443382B1 publication Critical patent/EP0443382B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like

Definitions

  • the invention relates to a method for cleaning the filter medium of a filter centrifuge according to the preamble of patent claim 1.
  • the invention is therefore based on the object of specifying a method of the aforementioned type in which a particularly thorough cleaning of the filter medium from product residues can be achieved with small amounts of liquid and in a short time.
  • the lower amount of liquid required according to the invention and the lower liquid content of the detached base layer solid constituents mean that the detachment and regeneration of the base layer requires less time and thus more time is available for the actual operation of the centrifuge.
  • the invention is based on the knowledge that on the one hand the adhesive effect of the solid components among one another and on the filter medium is reduced by the saturating penetration and flooding of the base layer with liquid and on the other hand due to the inertia when the drum brakes strongly between the filter medium on the one hand and the solid residues as well as the liquid on the other hand, shear forces are generated, which cause a largely complete detachment of the base layer from the filter medium.
  • Fig. 1 shows a filter centrifuge of the type with a siphon or backwashing device.
  • a drum 3 is mounted in a housing 1 with a horizontal drum axis of rotation 2.
  • the drum consists of a drum base 4, a solid casing 5, a ring cup 6, a rim 7 and a filter medium 8.
  • the solid shell 5 and the filter medium 8 enclose a filtrate collecting space 9, which is connected to the ring cup via a passage opening 10 arranged in the drum base 4 6 communicates.
  • a liquid supply pipe 11 and a peeling pipe 11a open into the ring cup 6.
  • a discharge device 14 Extending into the drum interior 12 is a discharge device 14 which can be pivoted about a pivot axis 13 and carries a peeling knife 15 which extends over the axial length of the drum 3.
  • the peeling knife 15 is followed by a discharge hopper 16 which opens into a discharge pipe 17 equipped with a discharge screw (not shown).
  • a suspension feed pipe 18 also projects into the drum interior 12.
  • the filter medium 8 there is a base layer 19 made of solid material, the thickness of which is determined by the radially outermost pivoting position of the peeling knife 15 during the discharge process. In the position shown, the peeling knife 15 is in a position pivoted back again from the surface of the base layer.
  • suspension is filled into the drum 3 via the suspension feed tube 18, whereupon the solid layer settles on the filter medium 8 during centrifugation and the filtrate flows through the filter medium 8 via the filtrate collecting space 9 and the passage opening 10 into the ring cup 6 where the filtrate can be completely drawn off by means of the peeling tube 11a which can be swiveled to the bottom of the ring cup.
  • the solid layer deposited on the filter medium 8 can then be peeled off by swiveling in the peeling knife 15 and discharged via the discharge funnel 16 and the discharge tube 17, the base layer 19 remaining on the filter medium 8, which in particular compresses after repeated peeling processes while increasing the filtration resistance.
  • liquid is poured into the ring cup 6 via the liquid feed tube 16, which liquid enters the filtrate collecting space 9 through the passage opening 10 and then the filter medium 8 and the base layer radially from the outside flows through until the base layer is flooded.
  • the drum speed is then reduced with strong negative acceleration, so that the liquid-saturated base layer 19 detaches from the filter medium 8 with all solid particles and slides over the filter medium 8.
  • the intensity of the cleaning effect depends on the rotation difference between the liquid loaded with solids in the base layer and the drum.
  • product residues that have become stuck under the filter medium or on its support structure (not shown) or on the inner wall of the full casing 5 can also be washed away and drawn off from the ring cup 6 together with the liquid with the peeling tube 11a.
  • the drum speed is determined by how strongly the residues of the base layer adhere to the filter medium.
  • the liquid loaded with the solids of the base layer can be discharged in such a way that the solid-liquid mixture collecting in the lower region when the drum speed slows down is suctioned off.
  • the procedure according to claim 4 is more rational, in which suspension is again filled onto the mixture consisting of solids of the base layer and the liquid, whereupon a normal operating cycle for dewatering a batch of suspension is started.
  • the emptying process is particularly simple for centrifuges with a vertical axis of rotation and bottom emptying, in which the mixture consisting of solids of the base layer and liquid is used after braking the drum slowly sinks down and falls out of the drum.
  • FIG. 2 shows a filter centrifuge of simple design without a siphon or backwashing device, but the components which correspond to the embodiment according to FIG. 1 are provided with the same reference numerals.
  • the liquid supply pipe 20 does not open into a ring cup, but into the drum interior 12.
  • the liquid is applied to the base layer 19 from the inside via the liquid supply pipe 20, the speed of the drum 3 and the number of previous peeling processes in accordance with the measures according to claim 2 is determined.
  • the procedure for completely cleaning the filter medium from constituents of the base layer is to be carried out as in the filter centrifuge described with the embodiment according to FIG. 1 with a siphon or backwashing drum.
  • the mixture consisting of base layer constituents and liquid can be discharged, whereby instead of discharging, a fresh supply of suspension can be started for a subsequent normal functional cycle for dewatering a batch of suspension.

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  • Centrifugal Separators (AREA)
EP91101733A 1990-02-15 1991-02-08 Verfahren zum Reinigen des Filtermittels einer Filterzentrifuge Expired - Lifetime EP0443382B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004763 1990-02-15
DE4004763 1990-02-15

Publications (2)

Publication Number Publication Date
EP0443382A1 EP0443382A1 (de) 1991-08-28
EP0443382B1 true EP0443382B1 (de) 1994-07-27

Family

ID=6400254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101733A Expired - Lifetime EP0443382B1 (de) 1990-02-15 1991-02-08 Verfahren zum Reinigen des Filtermittels einer Filterzentrifuge

Country Status (4)

Country Link
EP (1) EP0443382B1 (es)
JP (1) JPH04219156A (es)
DE (1) DE59102298D1 (es)
ES (1) ES2057619T3 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114598A1 (de) 2001-03-23 2002-10-02 Aventis Pharma Gmbh CIP-gerechte Ausführung einer Horizontalzentrifuge mit Vollmanteltrommel
CN106694246B (zh) * 2016-12-26 2019-04-23 江苏迈达新材料股份有限公司 一种用于2,6-二叔丁基-4-甲基苯酚的离心物料输送装置
JPWO2020149003A1 (ja) * 2019-01-17 2021-11-25 パナソニックＩｐマネジメント株式会社 洗濯機、および洗濯機の制御方法
CN112206929B (zh) * 2020-08-19 2024-09-17 宁夏亚东化工有限公司 噻唑生产用刮刀卸料离心机
CN114011591A (zh) * 2021-09-18 2022-02-08 安徽东至广信农化有限公司 一种生产草甘膦用离心机及其使用方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE349605A (es) * 1927-03-12
DE1062633B (de) * 1958-07-14 1959-07-30 Westfalia Separator Ag Verfahren und Vorrichtung zum Reinigen von Zentrifugentrommeln mit Austrittsoeffnungen am Trommelumfang
CH615604A5 (es) * 1977-02-22 1980-02-15 Escher Wyss Ag
JPS5617497B1 (es) * 1978-06-26 1981-04-22
CH659007A5 (de) * 1982-10-29 1986-12-31 Escher Wyss Ag Verfahren zur regenerierung einer kompakten, insbesondere einer unloeslichen restschicht in einer zentrifugentrommel.
JPS6172144A (ja) * 1984-09-13 1986-04-14 東陶機器株式会社 便器洗浄装置
JPS6417935A (en) * 1987-07-14 1989-01-20 Inax Corp Washer for closet
JPH0437676U (es) * 1990-07-20 1992-03-30

Also Published As

Publication number Publication date
ES2057619T3 (es) 1994-10-16
EP0443382A1 (de) 1991-08-28
DE59102298D1 (de) 1994-09-01
JPH04219156A (ja) 1992-08-10

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