EP0155632A2 - Procédé et dispositif pour la séparation de mélanges de matières - Google Patents

Procédé et dispositif pour la séparation de mélanges de matières Download PDF

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Publication number
EP0155632A2
EP0155632A2 EP85102848A EP85102848A EP0155632A2 EP 0155632 A2 EP0155632 A2 EP 0155632A2 EP 85102848 A EP85102848 A EP 85102848A EP 85102848 A EP85102848 A EP 85102848A EP 0155632 A2 EP0155632 A2 EP 0155632A2
Authority
EP
European Patent Office
Prior art keywords
cake
room
treatment room
cake formation
substances
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
EP85102848A
Other languages
German (de)
English (en)
Other versions
EP0155632B1 (fr
EP0155632A3 (en
Inventor
Herbert Dipl.-Ing. Schiele
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
Priority to AT85102848T priority Critical patent/ATE60257T1/de
Publication of EP0155632A2 publication Critical patent/EP0155632A2/fr
Publication of EP0155632A3 publication Critical patent/EP0155632A3/de
Application granted granted Critical
Publication of EP0155632B1 publication Critical patent/EP0155632B1/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
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S2/00—Apparel
    • Y10S2/908—Guard or protector having a hook-loop type fastener
    • Y10S2/91—Hand or wrist protector

Definitions

  • the invention relates to a method for separating mixtures of substances by means of centrifugal forces, in particular for filtering and / or sedimenting solids from suspensions, in which the mixture of substances is centrifuged in a cake-forming room until a cake washable with solid particles by flooding is formed, whereby for Cake formation is particularly sedimented and filtered at the same place, and a device for performing such a method.
  • centrifuges used for this can basically be subdivided into continuously working and discontinuously working devices.
  • centrifuges to be operated discontinuously individual batches of substance mixtures are successively filled into the centrifuge and processed one after the other.
  • continuously operated centrifuges the material mixture throughput takes place continuously, and continuously separated material is removed.
  • An example of continuously operating centrifuges is the so-called push centrifuge, in which the filtration chamber is not closed in the axial direction and a slide moves the material axially at short intervals, so that it is arranged along the axis of the centrifuge with changing concentration ratios.
  • discontinuous centrifuge is the so-called peeling centrifuge, in which a certain amount of substance mixture is filled into a filter drum, which is then rotated until the solid and liquid constituents are completely separated, after which the solid cake remaining in the drum is peeled out .
  • pusher centrifuges work with a filtration chamber that is not closed off in the axial direction, it is not possible to process material mixtures with low solids concentrations, because otherwise there would be a risk of layer flooding. Also, sub-centrifuges cannot be used to produce filtrates that are completely free of solids, since no filter cloths can be used. Another disadvantage of pusher centrifuges is that they do not allow good separation of mother liquors and washing liquids. The grains (solid particles) in push centrifuges are also subjected to excessive stress for certain applications. Peeling centrifuges (with or without siphon) have the main disadvantage that the throughput, i.e. the separation performance, is relatively low.
  • the present invention has for its object to provide a method for separating mixtures of the type mentioned and an apparatus for performing such a method by means of which a high material throughput can be achieved, with regard to the product purity, the product moisture, the filtrate clarity, the purity of mother liquors and washing liquids, grain protection and freedom from foreign particles should meet strict standards.
  • the method according to the invention for solving this problem is characterized in that the cake is transferred from the cake-forming room into at least one further treatment room and that the cake is spun in the treatment room for dehumidification.
  • the measure according to the invention of transferring the solid particles is based on the knowledge that in conventional peeler centrifuges, microstructures (so-called “gussets”) form in the solid cake during centrifuging, in which the capillary Forces and the adhesive forces outweigh the centrifugal forces so that the latter do not drive the liquid out of the solid cake.
  • the rearrangement makes the gusset for the washing liquid more accessible.
  • So-called barrier layers are also formed in the solid cake concentric to the axis of rotation, which also hinder the separation of the liquids.
  • the device according to the invention for solving this problem is characterized in that a cake formation space is provided, into which the mixture of substances to be separated is filled and at least partially separated to form a cake by filtration and / or sedimentation, and in that a treatment space is provided which is connected to the Cake formation room is temporarily connectable for transferring the cake.
  • the cake-forming space is approximately cylindrical, which has a smaller radius than the treatment space and both spaces have a common axis of rotation.
  • the cake formation space is thus arranged concentrically within the treatment space, so that the solid cake formed in the cake formation space falls radially outward with rearrangement into the treatment space.
  • the treatment room is preferably conical over at least part of its axial extent, so that the conical Sections of mass can easily move during the dry spin in the direction of the end section with the larger diameter of the treatment room, where a race track with discharge nozzle is advantageously arranged.
  • the treatment room is fastened to a hollow shaft and that the cake-forming chamber is fastened to a push rod which is concentrically arranged in the hollow shaft and which is axially displaceable to the hollow shaft. Furthermore, it is provided that a radially extending sliding floor is arranged in the cake formation space, which closes an end face of the filling interior of the cake formation space, and that the opposite end face of the filling interior of the cake formation space is closed by a radially extending drum rim. In this way, the solid cake formed in the cake-forming room falls into the treatment room during relative movement between the two rooms, where it can be spun dry.
  • This method also has the advantage that the working hours of the two rooms can be set differently depending on the mixture of substances to be separated, so that the desired quality of the product can be achieved without "jamming" in the centrifuge. For example, if it is found that the spin drying takes an excessive amount of time in relation to the processes in the cake forming room, a pre-dehumidification in the cake forming room can be achieved by an extended period of rotation, so that the dry spinning takes less time. Overall, the operating parameters,
  • the centrifuge is designed as a horizontal centrifuge.
  • the rotating, axially immovable treatment room 2 is attached to the hollow shaft 1.
  • the treatment chamber 2, which is designed as a drum, carries a filter 3. It has a cylindrical section 3a and an adjoining conical section 3b. At the end with the larger diameter of the conical section 3b, a so-called racetrack 13 with discharge nozzle 14 is arranged.
  • a filtrate catch housing 15 is used to hold the separated liquid.
  • a cake-forming space 5 is fixed concentrically with the treatment space 2 on a push rod 4, which is arranged in the hollow shaft 1.
  • the axis of rotation is provided with the reference symbol 30.
  • the push rod 4 rotates at the same speed as the hollow shaft 1, so that the two spaces 2 and 5 have the same angular velocity.
  • the push rod 4 is axially movable in the direction of the double arrow 40, so that the cake forming space 5 attached to it can also be moved axially.
  • a moving floor 8 with a sealing ring 9 is fixed in place on the treatment room 2 by means of a bolt collar 7.
  • the push floor 8 closes the interior 32 of the cake formation chamber 5 tightly on an axial end face.
  • the opposite end face of the interior 32 of the cake formation space 5 is closed off by a drum rim 10 which is at a constant distance from the sliding floor 8.
  • the mixture of substances to be separated is fed into the interior 32 of the cake formation chamber 5 via an inlet pipe 12.
  • the push rod 4 is set so that the interior 32 of the drum rim 10 via seal 11 on the one hand and from the push floor 8 via seal 9 on the other hand is sealed.
  • a filter 6 in the cake formation chamber 5 enables liquid to escape from the interior 32, which is collected in the filtrate housing 15.
  • Above the filter 6, the solid cake 50 is formed in the interior 32, which is optionally subjected to a washing liquid from above.
  • a support fabric 22 is interposed.
  • the cake After a batch has been pre-separated in the cake-forming room 5 after it has been filled in with cake formation by means of filtrate / sedimentation, the cake can be pre-dehumidified by intermediate spinning. The solid cake can then be washed - if necessary several times - using a washing liquid.
  • the push rod 4 is moved to the right in accordance with arrow 40 in FIG. 1, the drum rim 10 and the push floor 8 remaining stationary, so that the solid particle cake 50 falls out of the cake formation chamber 5 into the treatment room 2.
  • the structures formed there, such as “gussets” or barrier layers, are dissolved and the solid particles rearrange themselves.
  • the push rod 4 moves to the right in FIG. 1 to such an extent that the entire solid charge from the interior 32 of the cake-forming chamber 5 is striking the cylindrical section 3a of the treatment chamber 2.
  • the push rod 4 then moves to the left in FIG.
  • the inclination of the conical section 3b of the treatment room 2 is selected so that the solid cake can be moved with little thrust in the direction of the racetrack 13, from where the solids are discharged from the device via the discharge nozzle 14.
  • FIG. 2 shows the area A bordered in FIG. 1 in detail.
  • a so-called “side filtration” can be used.
  • a support fabric 17 fastened to the drum rim 10 with a sieve 18 enables the liquid 60, in particular, which protrudes in the filter chamber, to drain through the bores 19.
  • a siphon system 36 fastened to the drum rim 10 with (known per se) siphon cup 20 and siphon peeling tube 21 enables filtrate drainage through the bores 25 in the case of missing or blocked bores 16 in the cake formation chamber 5.
  • the difference in height H of the liquid column under the sieve 6 of the cake formation chamber becomes effective .

Landscapes

  • Centrifugal Separators (AREA)
  • Extraction Or Liquid Replacement (AREA)
EP85102848A 1984-03-21 1985-03-13 Procédé et dispositif pour la séparation de mélanges de matières Expired - Lifetime EP0155632B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102848T ATE60257T1 (de) 1984-03-21 1985-03-13 Verfahren und vorrichtung zum trennen von stoffgemischen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843410423 DE3410423A1 (de) 1984-03-21 1984-03-21 Verfahren und vorrichtung zum trennen von stoffgemischen
DE3410423 1984-03-21

Publications (3)

Publication Number Publication Date
EP0155632A2 true EP0155632A2 (fr) 1985-09-25
EP0155632A3 EP0155632A3 (en) 1987-11-25
EP0155632B1 EP0155632B1 (fr) 1991-01-23

Family

ID=6231209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102848A Expired - Lifetime EP0155632B1 (fr) 1984-03-21 1985-03-13 Procédé et dispositif pour la séparation de mélanges de matières

Country Status (7)

Country Link
US (1) US5021158A (fr)
EP (1) EP0155632B1 (fr)
JP (1) JPS60212256A (fr)
AT (1) ATE60257T1 (fr)
DE (1) DE3410423A1 (fr)
GB (1) GB2155801A (fr)
IN (1) IN162707B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010748A1 (de) * 1989-04-13 1990-10-25 Stahl Werner Verfahren zum betrieb einer schubzentrifuge
DE10115381A1 (de) * 2001-03-28 2002-10-24 Heinkel Ag Stülpfilterzentrifuge
US7686965B2 (en) * 2006-05-31 2010-03-30 Cook Melvin W Centrifugal fluid filtration devices, systems and methods
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030771B (de) * 1956-04-06 1958-05-22 Krauss Maffei Ag Schubzentrifuge fuer zaehfluessige, bei Raumtemperatur erstarrende kristallinische Schleudergueter
FR1362722A (fr) * 1962-05-19 1964-06-05 Centrifugeuse à décanteur et à crible
DE1911147A1 (de) * 1969-03-05 1970-11-19 Ernst Heinkel Maschb Gmbh Zentrifuge
FR2209613A1 (fr) * 1972-12-11 1974-07-05 Krauss Maffei Ag
US4109853A (en) * 1977-04-26 1978-08-29 De Dietrich & Cie, S.A. Centrifugal filter press

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH98244A (de) * 1921-10-18 1923-03-01 Kleiner Salomon Schleudermaschine für Trauben, Baumfrüchte usw.
DE468661C (de) * 1926-12-29 1928-11-17 Poul Aksel Frederik Norup Fahnenstange mit Vorrichtung zum Aufrollen der Fahne
US1839941A (en) * 1927-03-29 1932-01-05 Zelezniak Wladyslaw Centrifugal separator
FR792920A (fr) * 1935-07-25 1936-01-13 Phonogramme et dispositif pour produire le déplacement de ce phonogramme par rapport à une aiguille fixe
NL184631B (nl) * 1953-02-10 Lubrizol Corp Omzettingsprodukt van een door een alkyl- of alkenylgroep gesubstitueerd barnsteenzuur of een anhydride daarvan met een hydroxyalkylamine, alsmede in water gedispergeerde functionele vloeistoffen, die het omzettingsprodukt als dispergeermiddel bevatten.
NL197240A (fr) * 1953-05-25
NL192146A (fr) * 1953-11-23
US2932401A (en) * 1957-06-13 1960-04-12 American Tool & Machine Compan Suspended centrifugal apparatus
NL228952A (fr) * 1957-07-06
DE1822890U (de) * 1959-04-17 1960-12-01 Heine Geb Schubboden fuer eine schubzentrifuge.
FR1226010A (fr) * 1959-04-23 1960-07-06 Zd Y Vitezneho Unora Narodni P Centrifugeuse à fonctionnement continu
DE1119774B (de) * 1960-08-31 1961-12-14 Krupp Dolberg G M B H Schubzentrifuge mit Waschvorrichtung fuer das geschleuderte Gut
DE1852395U (de) * 1962-03-16 1962-05-24 Rudolf Ellerbrock Vorrichtung zum zeitweiligen halten des schleudergutes in einer schubzentrifuge.
GB1047434A (fr) * 1962-06-04
DE1873581U (de) * 1963-04-11 1963-06-06 Krauss Maffei Ag Schwingzentrifuge.
CH452441A (de) * 1966-08-23 1968-05-31 Escher Wyss Ag Schubzentrifuge
GB1132400A (en) * 1966-09-12 1968-10-30 Rudolf Ellerbrock Centrifugal separator
CH489282A (de) * 1968-10-30 1970-04-30 Escher Wyss Ag Schubzentrifuge mit zwei oder mehr Schleudertrommeln
CH591286A5 (fr) * 1975-04-22 1977-09-15 Escher Wyss Ag
DE2542916B2 (de) * 1975-09-26 1980-08-07 Siebtechnik Gmbh, 4330 Muelheim Zweistufige Schubzentrifuge
FR2334420A1 (fr) * 1975-12-12 1977-07-08 Dietrich & Cie De Essoreuse a poussee axiale
DE2603610A1 (de) * 1976-01-30 1977-08-04 Krauss Maffei Ag Zentrifugentrommel mit seitenfiltration
DE7733219U1 (de) * 1977-10-28 1978-04-13 Siebtechnik Gmbh, 4330 Muelheim Schwingzentrifuge zur entwaesserung von kohleschlamm
CH624858A5 (fr) * 1977-11-25 1981-08-31 Escher Wyss Ag
CH627376A5 (de) * 1977-12-07 1982-01-15 Escher Wyss Ag Zentrifuge mit einem ein gasfoermiges medium enthaltenden feststoffraum.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030771B (de) * 1956-04-06 1958-05-22 Krauss Maffei Ag Schubzentrifuge fuer zaehfluessige, bei Raumtemperatur erstarrende kristallinische Schleudergueter
FR1362722A (fr) * 1962-05-19 1964-06-05 Centrifugeuse à décanteur et à crible
DE1911147A1 (de) * 1969-03-05 1970-11-19 Ernst Heinkel Maschb Gmbh Zentrifuge
FR2209613A1 (fr) * 1972-12-11 1974-07-05 Krauss Maffei Ag
US4109853A (en) * 1977-04-26 1978-08-29 De Dietrich & Cie, S.A. Centrifugal filter press

Also Published As

Publication number Publication date
GB8502430D0 (en) 1985-03-06
ATE60257T1 (de) 1991-02-15
US5021158A (en) 1991-06-04
GB2155801A (en) 1985-10-02
DE3410423A1 (de) 1985-10-03
EP0155632B1 (fr) 1991-01-23
EP0155632A3 (en) 1987-11-25
JPS60212256A (ja) 1985-10-24
IN162707B (fr) 1988-07-02
DE3410423C2 (fr) 1988-06-30

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