EP0231722B1 - Kontinuierlich arbeitende Zuckerzentrifuge - Google Patents

Kontinuierlich arbeitende Zuckerzentrifuge Download PDF

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Publication number
EP0231722B1
EP0231722B1 EP86710002A EP86710002A EP0231722B1 EP 0231722 B1 EP0231722 B1 EP 0231722B1 EP 86710002 A EP86710002 A EP 86710002A EP 86710002 A EP86710002 A EP 86710002A EP 0231722 B1 EP0231722 B1 EP 0231722B1
Authority
EP
European Patent Office
Prior art keywords
drum
sugar
conducting ring
edge
air conducting
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
Application number
EP86710002A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0231722A1 (de
Inventor
Helmut Schaper
Heinrich Kurland
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.)
BMA Braunschweigische Maschinenbauanstalt AG
Original Assignee
BMA Braunschweigische Maschinenbauanstalt 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
Priority to DE3129392A priority Critical patent/DE3129392C1/de
Priority to GB08220222A priority patent/GB2104793B/en
Priority to IT22366/82A priority patent/IT1151839B/it
Priority to US06/398,615 priority patent/US4443266A/en
Priority to FR8212718A priority patent/FR2509999B1/fr
Priority to JP57127768A priority patent/JPS5827658A/ja
Priority to SE8204440A priority patent/SE457061B/sv
Application filed by BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Priority to DE8686710002T priority patent/DE3665994D1/de
Priority to EP86710002A priority patent/EP0231722B1/de
Priority to US07/002,956 priority patent/US4718945A/en
Priority to JP62005188A priority patent/JPS62216657A/ja
Priority to IN26/MAS/87A priority patent/IN168688B/en
Publication of EP0231722A1 publication Critical patent/EP0231722A1/de
Application granted granted Critical
Publication of EP0231722B1 publication Critical patent/EP0231722B1/de
Expired 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/04—Separating crystals from mother liquor
    • C13B30/06—Separating crystals from mother liquor by centrifugal force

Definitions

  • the invention relates to a continuously operating sugar centrifuge with a filling compound feed device, a truncated cone-shaped co-rotating distribution and acceleration device, which is enclosed by a housing and can be driven in rotation about its central axis, by means of which the filling compound is distributed uniformly on the drum sieve in the bottom region of the drum, as well as in the cover water nozzles arranged in a fixed manner in the cross-sectionally narrow area and separate collecting and discharge devices provided above the drum for the sugar emerging via the opening-side drum edge and the outflow flowing through openings in the drum wall.
  • the centrifuges have been equipped with the sieve drum, essentially adapted to co-rotating, closed covering hoods, which extended directly to the top zone in the direction of the upper edge of the drum and which, together with the drum, limited a sugar passage gap which roughly corresponds to the layer thickness of the sugar on the drum screen.
  • This solution was based on the assumption that the atomized cover water was thrown back to the sugar layer to a very considerable extent in the area outside the cover zone.
  • hoods of the type described have the major disadvantage that small lumps of sugar or temporary, small accumulations of the sugar crystals which arise during operation lead to faults, because these clumps or lumps which arise are caught on the inlet side of the gap between the hood and the sieve and this leads to a local congestion of the inflowing sugar crystals and also causes strip-like interruptions and thus unevenness in the sugar layer flowing off to the edge of the drum.
  • it is unavoidable that sugar lumps get onto the side of the cover facing the inside of the drum and are thrown off over the cover or fall back into the drum from the cover. This results in additional sources of interference and danger.
  • the object of the invention is to ensure an effective separation of the atomized cover water from the sugar in the area outside the cover zone and, at the same time, to ensure reliable, trouble-free operation of the centrifuge even when local sugar accumulations are formed or lumps exceeding the layer thickness of the sugar.
  • a conically widening air guide ring is provided in the extension of the drum wall at the opening-side extended end of the drum, which together with the drum wall delimits a passage gap for the sugar and whose edge pointing away from the drum into a along the air guide ring
  • the ring-shaped stowage and collection space which is open towards the inside of the drum, projects.
  • the invention is based on the finding that the resulting cover water mist is practically not thrown back onto the sugar layer located outside the cover zone, but is carried along by the air flow generated by the ventilation effect of the centrifuges. It is therefore not necessary to mechanically cover the sugar layer located in the centrifuge outside the top zone, but rather to use the ventilation flow appropriately and to ensure that this ventilation flow cannot come into contact with the thrown off sugar. This is achieved through the above training.
  • the ventilation flow is continued through the air guide ring in the direction and extension of the drum wall beyond the sugar outlet gap and only then is deflected radially into the annular storage and collection space.
  • the passage gap for the sugar between the air guide ring and the opening-side end of the drum can be dimensioned larger than it speaks to the layer thickness of the sugar, so that local crystal clumps and sugar lumps up to a predetermined size can pass through the exit gap without causing interference .
  • the ventilation flow is calmed down and the water mist particles and impurities carried along by the ventilation flow settle, so that their removal from the storage and collection space is possible without difficulty.
  • the air guide ring can be arranged as a stationary ring in the axial extension of the drum wall with a corresponding distance from the enlarged drum edge. However, it is particularly advantageous if the air guide ring is firmly connected to the opening-side edge of the drum at circumferentially distributed locations.
  • the co-rotating formation of the air guide ring leads to the fact that the ventilation flow is supported by the air guide ring and if there are imbalance movements of the drum, the air guide ring follows these movements and cannot collide with the drum.
  • the air guide ring can connect to the opening-side drum edge while leaving the sugar outlet gap. However, it is favorable if it engages in the opening-side edge region of the drum while leaving the passage gap for the sugar. This can reduce the increase in the height of the centrifuge. It is expedient if the drum has an edge region which is enlarged by a step in cross section and into which the air guide ring extends.
  • the drawing shows an exemplary embodiment in a schematic representation in the form of a partial longitudinal section through the centrifuge designed according to the invention.
  • a centrifuge that can be driven to rotate about its vertical axis is shown. It has an outer housing 1, through the upper cover wall 1a of which a filler feed pipe 2 extends, which belongs to a filler feed device. Provided in the housing 1 is the frustoconical sieve drum 4, which can be driven to rotate about its central axis 3, the rotational axis of which is not shown in the drawing is held in a stationary bearing block 5. On the hub 6 of the centrifuge protruding into the interior of the sieve drum 4, a schematically represented distribution and acceleration pot 7 is arranged, which is equipped with distributor pins 7a. Furthermore, an acceleration bell 8 is provided in the interior of the screening drum 4, which surrounds the distribution and acceleration pot 7 and extends into the area of the bottom 4a of the screening drum 4.
  • the drum 4 which widens conically upwards in the example, has a continuous wall 4b and is covered by an internal sieve 9 while leaving a gap space.
  • a co-rotating ring element 10 is fixedly connected to the upper end of the drum wall 4, in which passage openings 11 are provided for the process that is separated from the crystals when the filling material is spun off.
  • the passage openings 11 open into a drain collecting space 12.
  • the centrifuge shown is further equipped with a stationary device for supplying deck water, which has a supply pipe 13 and nozzles 14 provided at the lower end of the pipe, which are provided in the region of the narrower-section part of the sieve drum 4.
  • an air guide ring 15 adjoins the end of the drum 4 which is widened on the opening side, the conicity of which corresponds approximately to the conicity of the drum wall 4b.
  • a passage gap 16 is provided between the air guide ring 15 and the upper drum rim formed by the ring element 10, for the sugar to be thrown out of the drum.
  • the edge 15a of the air guide ring pointing away from the drum 4 extends into an annular storage and collection space 17, which is partially delimited by the outer housing 1 and which is in open communication with the interior of the drum 4.
  • the air guide ring 15 is connected to the opening-side edge of the drum 4 at circumferentially distributed locations.
  • Such a connection point 19 is shown schematically in the figure.
  • the opening-side edge region of the drum 4, which is formed by the ring element 10 has a step-shaped widening, which is delimited by a ring profile plate 10a belonging to the ring element 10 and which forms the throwing edge 10b for the sugar from the sieve drum 4 .
  • the air guide ring 15 extends in the example into the graduated edge region of the sieve drum 4, so that there is a correspondingly graduated outlet gap for the sugar emerging from the drum 4.
  • an apron 2 partially delimiting the storage and collection space 17 is provided on the upper wall 1 a. This extends only so far in the direction of the sieve drum 4 that a sufficiently open, annular gap 21 remains between the interior of the storage and collection space 17 and the interior of the sieve drum 4.
  • the filling material is passed through the accelerating device and reaches the inside of the sieve drum 4 evenly distributed over the lower edge of the accelerating bell 8. It travels along the sieve 9 of the sieve drum 4 to the ring element 10 and becomes narrow in cross-section Area acted upon by the cover water jets emerging from the nozzles 14 of the cover water pipe 13.
  • the mist that inevitably arises when the cover water is sprayed on is transferred through the open flow 21 between the air guide ring 15 and the apron element 20 into the storage and collection space 17 by the ventilation flow generated approximately in the direction parallel to the wall 4b of the drum 4.
  • the stowage and collection space forms an annular channel which is delimited at the bottom against the collection space 22 for the sugar by an inclined wall 17a which forms a labyrinth seal at its end facing the air guide ring 15 with the air guide ring 15.
  • the edge 15a of the air guide ring 15 pointing away from the drum 4 is hook-shaped and engages with play a ring profile part 17b which is U-shaped in cross section and connected to the wall 17a.
  • the stowage and collection space 17 is connected via similar labyrinth-like wall parts or via the annular gap 18 to the ambient air, so that while maintaining the desired settling process for the entrained liquid particles, the ventilation air while reducing the build-up in the stowage and collection space Pressure can escape into the open.
  • the air guide ring 15 For the operation of the air guide ring 15, it is not absolutely necessary that this engages in an enlarged cross-section of the drum, but the air guide ring can also be aligned with the discharge gap for the sugar in alignment with the wall 4b of the sieve drum. It is important that it forms a guide surface for the ventilation air in order to transfer it into the storage and collection space.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Centrifugal Separators (AREA)
EP86710002A 1981-07-25 1986-01-18 Kontinuierlich arbeitende Zuckerzentrifuge Expired EP0231722B1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE3129392A DE3129392C1 (de) 1981-07-25 1981-07-25 Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen
GB08220222A GB2104793B (en) 1981-07-25 1982-07-12 Continuously operating sugar centrifuge
IT22366/82A IT1151839B (it) 1981-07-25 1982-07-13 Centrifuga per zucchero a funzionamento continuo
US06/398,615 US4443266A (en) 1981-07-25 1982-07-15 Continuously operating sugar centrifuge
FR8212718A FR2509999B1 (fr) 1981-07-25 1982-07-21 Centrifugeuse a sucre a fonctionnement continu
SE8204440A SE457061B (sv) 1981-07-25 1982-07-23 Kontinuerligt arbetande sockercentrifug
JP57127768A JPS5827658A (ja) 1981-07-25 1982-07-23 連続作動型遠心分離機
DE8686710002T DE3665994D1 (en) 1981-07-25 1986-01-18 Continuously operating sugar centrifuge
EP86710002A EP0231722B1 (de) 1981-07-25 1986-01-18 Kontinuierlich arbeitende Zuckerzentrifuge
US07/002,956 US4718945A (en) 1981-07-25 1987-01-13 Sugar centrifuge
JP62005188A JPS62216657A (ja) 1981-07-25 1987-01-14 連続動作糖遠心分離機
IN26/MAS/87A IN168688B (enrdf_load_stackoverflow) 1981-07-25 1987-01-16

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3129392A DE3129392C1 (de) 1981-07-25 1981-07-25 Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen
EP86710002A EP0231722B1 (de) 1981-07-25 1986-01-18 Kontinuierlich arbeitende Zuckerzentrifuge

Publications (2)

Publication Number Publication Date
EP0231722A1 EP0231722A1 (de) 1987-08-12
EP0231722B1 true EP0231722B1 (de) 1989-10-04

Family

ID=39615770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86710002A Expired EP0231722B1 (de) 1981-07-25 1986-01-18 Kontinuierlich arbeitende Zuckerzentrifuge

Country Status (9)

Country Link
US (2) US4443266A (enrdf_load_stackoverflow)
EP (1) EP0231722B1 (enrdf_load_stackoverflow)
JP (2) JPS5827658A (enrdf_load_stackoverflow)
DE (2) DE3129392C1 (enrdf_load_stackoverflow)
FR (1) FR2509999B1 (enrdf_load_stackoverflow)
GB (1) GB2104793B (enrdf_load_stackoverflow)
IN (1) IN168688B (enrdf_load_stackoverflow)
IT (1) IT1151839B (enrdf_load_stackoverflow)
SE (1) SE457061B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545952C1 (de) * 1995-12-08 1997-03-27 Braunschweigische Masch Bau Kontinuierlich arbeitende Zentrifuge

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129392C1 (de) * 1981-07-25 1983-03-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen
DE3405752C2 (de) * 1984-02-17 1986-02-13 Hein, Lehmann AG, 4000 Düsseldorf Kontinuierlich arbeitende Zentrifuge
IT1186781B (it) * 1985-10-18 1987-12-16 Carle & Montanari Spa Dispositivo di estrazione di una massa zuccherina da un cuocitore di massa zuccherina funzionante sotto vuoto
DE3633890A1 (de) * 1986-10-04 1988-04-07 Braunschweigische Masch Bau Kontinuierlich arbeitende zuckerzentrifuge
DE3929597A1 (de) * 1989-09-06 1991-03-07 Krupp Buckau Maschinenbau Gmbh Austragvorrichtung fuer kontinuierlich arbeitende siebzentrifugen
US4961722A (en) * 1989-11-30 1990-10-09 Guyan Machinery Co. Conical screen for a vertical centrifugal separator
JPH0427457A (ja) * 1990-05-23 1992-01-30 Matsushita Electric Ind Co Ltd 遠心分離機および自動遠心分離装置
GB9026028D0 (en) * 1990-11-29 1991-01-16 Ecc Int Ltd A screening system
EP0487780B1 (de) * 1990-11-30 1994-03-30 Braunschweigische Maschinenbauanstalt AG Kontinuierlich arbeitende Zentrifuge zum Abschleudern von Zuckerfüllmassen
US5256289A (en) * 1991-11-04 1993-10-26 Centrifugal & Mechanical Industries, Inc. Centrifugal separator incorporating structure to reduce abrasive wear
US5286299A (en) * 1991-12-13 1994-02-15 Silver Engineering Works, Inc. Apparatus and method for providing reduced crystal damage in a sugar centrifugal
US5485066A (en) * 1994-04-15 1996-01-16 Savannah Foods And Industries Variable speed centrifugal drive control for sugar refining machines and the like
US5558770A (en) * 1995-07-03 1996-09-24 Elgin National Industries, Inc. Centrifugal separator having a cone frustum
DE19817275C1 (de) * 1998-04-18 1999-07-15 Braunschweigische Masch Bau Verfahren und Vorrichtung zum Decken des Zuckers
JP2000237635A (ja) * 1999-02-17 2000-09-05 Shokuhin Kikai Kaihatsu:Kk 加熱機構を備えた固液分離装置
DE102009021588B4 (de) * 2009-05-15 2013-12-12 Bma Braunschweigische Maschinenbauanstalt Ag Kontinuierlich arbeitende Zentrifuge

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1043957B (de) * 1955-02-17 1958-11-13 Paula Schweppe Austragorgan fuer anbackende Feststoffkuchen in kontinuierlich arbeitenden Entfeuchtungszentrifugen
BE653051A (enrdf_load_stackoverflow) * 1963-09-26
US3302794A (en) * 1964-10-30 1967-02-07 Western States Machine Co Continuous centrifugal with adjustable liquids separator
DE1288988C2 (de) * 1966-04-07 1973-08-16 Braunschweigische Maschb Ansta Kontinuierlich arbeitende Siebzentrifuge, insbesondere Zuckerzentrifuge
DE1532688B1 (de) * 1966-08-26 1970-04-30 Braunschweigische Maschb Ansta Kontinuierlich arbeitende Zentrifuge,insbesondere Zuckerzentrifuge
DE1927179C3 (de) * 1969-05-28 1978-10-12 Passavant-Werke Michelbacher Huette, 6209 Aarbergen Umlaufender Träger für ohne Mittelbauwerk ausgeführte Rundbecken
DE2026479C3 (de) * 1970-05-29 1978-10-12 Josef 7000 Stuttgart Halder Kontinuierlich arbeitende Zentrifuge
DE2151476C2 (de) * 1971-10-15 1980-10-23 Kurt 4044 Kaarst Pause Dickschicht-Strömungszentrifuge
US3791577A (en) * 1972-08-08 1974-02-12 J Lacher Centrifuge and rotating discharge means therefor
US3970470A (en) * 1974-10-18 1976-07-20 Hein, Lehmann A.G. Centrifuge
US4253960A (en) * 1977-10-11 1981-03-03 Reclamet, Inc. Chip discharge for continuous chip wringer
DE2803160C3 (de) * 1978-01-25 1982-12-09 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Kontinuierlich arbeitende Zentrifuge
DE2936659A1 (de) * 1979-09-11 1981-03-19 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende zuckerzentrifuge
DE7929249U1 (de) * 1979-10-16 1980-01-17 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Kontinuierlich arbeitende zuckerzentrifuge
DE2948691C2 (de) * 1979-12-04 1984-11-15 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zentrifuge zum Einmaischen und Abschleudern von Zuckerfüllmassen
US4298476A (en) * 1979-12-10 1981-11-03 Reclamet, Inc. Air blade construction for chip wringer
DE8105054U1 (de) * 1981-02-24 1982-09-30 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig "Kontinuierlich arbeitende Zuckerzentrifuge"
NL8200100A (nl) * 1981-02-24 1982-09-16 Braunschweigische Masch Bau Continu werkende suikercentrifuge.
DE3129392C1 (de) * 1981-07-25 1983-03-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545952C1 (de) * 1995-12-08 1997-03-27 Braunschweigische Masch Bau Kontinuierlich arbeitende Zentrifuge

Also Published As

Publication number Publication date
DE3665994D1 (en) 1989-11-09
JPS62216657A (ja) 1987-09-24
GB2104793A (en) 1983-03-16
IN168688B (enrdf_load_stackoverflow) 1991-05-18
SE8204440D0 (sv) 1982-07-23
US4718945A (en) 1988-01-12
FR2509999B1 (fr) 1985-11-15
JPH0144381B2 (enrdf_load_stackoverflow) 1989-09-27
IT1151839B (it) 1986-12-24
GB2104793B (en) 1985-02-20
IT8222366A0 (it) 1982-07-13
FR2509999A1 (fr) 1983-01-28
EP0231722A1 (de) 1987-08-12
DE3129392C1 (de) 1983-03-31
SE8204440L (sv) 1983-01-26
US4443266A (en) 1984-04-17
JPS5827658A (ja) 1983-02-18
SE457061B (sv) 1988-11-28

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