EP0443382A1 - Procédé de nettoyage de l'élément filtrant d'une centrifugeuse filtrante - Google Patents

Procédé de nettoyage de l'élément filtrant d'une centrifugeuse filtrante Download PDF

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Publication number
EP0443382A1
EP0443382A1 EP91101733A EP91101733A EP0443382A1 EP 0443382 A1 EP0443382 A1 EP 0443382A1 EP 91101733 A EP91101733 A EP 91101733A EP 91101733 A EP91101733 A EP 91101733A EP 0443382 A1 EP0443382 A1 EP 0443382A1
Authority
EP
European Patent Office
Prior art keywords
base layer
liquid
filter
drum
filter medium
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
EP91101733A
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German (de)
English (en)
Other versions
EP0443382B1 (fr
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/fr
Application granted granted Critical
Publication of EP0443382B1 publication Critical patent/EP0443382B1/fr
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 filter media in filter centrifuges according to the preamble of patent claim 1.
  • Filter media from filter centrifuges in which the filter cake is removed in batches by means of a peeling and discharge device, have a tendency to increase the filtration resistance, since the base layer remaining after the peeling becomes denser with each peeling process. The base layer must therefore be completely removed from the filter medium after a certain number of peeling or discharge processes.
  • the invention is therefore based on the object of specifying a method of the aforementioned type, in which a particular one without additional additional equipment and only with small amounts of liquid thorough cleaning of the filter medium from product residues can be achieved.
  • the invention is based on the knowledge that on the one hand the adhesive effect of the solid constituents 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 is braked strongly between the filter medium on the one hand and the solid residues and the liquid on the other hand, shear forces are generated, which cause the base layer to be largely completely detached 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 has a through opening 10 arranged in the drum base 4 with the ring cup 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.
  • a discharge hopper 16 adjoins the peeling knife 15 and 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.
  • 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 pivoted 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 pipe 16, which passes through the through opening 10 into the filtrate collecting space 9 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 lodged 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 removed 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 is slowed 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 components 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 components and liquid can be discharged, whereby instead of discharging, a renewed 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 Procédé de nettoyage de l'élément filtrant d'une centrifugeuse filtrante Expired - Lifetime EP0443382B1 (fr)

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 true EP0443382A1 (fr) 1991-08-28
EP0443382B1 EP0443382B1 (fr) 1994-07-27

Family

ID=6400254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101733A Expired - Lifetime EP0443382B1 (fr) 1990-02-15 1991-02-08 Procédé de nettoyage de l'élément filtrant d'une centrifugeuse filtrante

Country Status (4)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076621A1 (fr) * 2001-03-23 2002-10-03 Aventis Pharma Deutschland Gmbh Decanteuse a axe horizontal a buses de nettoyage sur place
CN106694246A (zh) * 2016-12-26 2017-05-24 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
CN113286922A (zh) * 2019-01-17 2021-08-20 松下知识产权经营株式会社 洗衣机和洗衣机的控制方法
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761593A (en) * 1927-03-12 1930-06-03 Sharples Specialty Co Centrifugal treatment of substances
DE1062633B (de) * 1958-07-14 1959-07-30 Westfalia Separator Ag Verfahren und Vorrichtung zum Reinigen von Zentrifugentrommeln mit Austrittsoeffnungen am Trommelumfang
FR2380820A1 (fr) * 1977-02-22 1978-09-15 Escher Wyss Sa Procede et dispositif pour la regeneration de la couche filtrante d'une centrifugeuse a ecroutage
GB2129327A (en) * 1982-10-29 1984-05-16 Sulzer Escher Wyss Ltd Centrifugal strainer cleaning

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617497B1 (fr) * 1978-06-26 1981-04-22
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 (fr) * 1990-07-20 1992-03-30

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761593A (en) * 1927-03-12 1930-06-03 Sharples Specialty Co Centrifugal treatment of substances
DE1062633B (de) * 1958-07-14 1959-07-30 Westfalia Separator Ag Verfahren und Vorrichtung zum Reinigen von Zentrifugentrommeln mit Austrittsoeffnungen am Trommelumfang
FR2380820A1 (fr) * 1977-02-22 1978-09-15 Escher Wyss Sa Procede et dispositif pour la regeneration de la couche filtrante d'une centrifugeuse a ecroutage
GB2129327A (en) * 1982-10-29 1984-05-16 Sulzer Escher Wyss Ltd Centrifugal strainer cleaning

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076621A1 (fr) * 2001-03-23 2002-10-03 Aventis Pharma Deutschland Gmbh Decanteuse a axe horizontal a buses de nettoyage sur place
US8574143B2 (en) 2001-03-23 2013-11-05 Sanofi-Aventis Deutschland Gmbh Compliant design of a horizontal solid-bowl centrifuge with cleaning-in-place nozzles
CN106694246A (zh) * 2016-12-26 2017-05-24 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
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
CN113286922A (zh) * 2019-01-17 2021-08-20 松下知识产权经营株式会社 洗衣机和洗衣机的控制方法
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

Also Published As

Publication number Publication date
EP0443382B1 (fr) 1994-07-27
DE59102298D1 (de) 1994-09-01
JPH04219156A (ja) 1992-08-10
ES2057619T3 (es) 1994-10-16

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