EP0045336A1 - Kontinuierlich arbeitende Siebzentrifugen - Google Patents

Kontinuierlich arbeitende Siebzentrifugen Download PDF

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Publication number
EP0045336A1
EP0045336A1 EP80401139A EP80401139A EP0045336A1 EP 0045336 A1 EP0045336 A1 EP 0045336A1 EP 80401139 A EP80401139 A EP 80401139A EP 80401139 A EP80401139 A EP 80401139A EP 0045336 A1 EP0045336 A1 EP 0045336A1
Authority
EP
European Patent Office
Prior art keywords
partition
skirt
basket
baffle
chamber
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
EP80401139A
Other languages
English (en)
French (fr)
Other versions
EP0045336B1 (de
Inventor
Gérard Journet
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to DE8080401139T priority Critical patent/DE3066973D1/de
Priority to EP80401139A priority patent/EP0045336B1/de
Publication of EP0045336A1 publication Critical patent/EP0045336A1/de
Application granted granted Critical
Publication of EP0045336B1 publication Critical patent/EP0045336B1/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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/04—Casings facilitating discharge

Definitions

  • the present invention relates to centrifugal wringers with continuous operation of the type comprising a conical basket rotating around a vertical axis and the inner surface of which is covered with a screen on which the product to be wrung, which is poured into the basket, moves. under the action of centrifugal force to the upper large diameter end of the basket where it is evacuated by overflow and collected in a first chamber, the liquid having filtered through the sieve being collected in a second chamber surrounding the basket and separated from the first by a circular partition.
  • the rotation of the basket causes an air circulation from the interior of the basket to the liquid receiving chamber, through the basket openings, then to the chamber for receiving the product wrung out through the circular slot which exists between the upper edge of the basket and that of the partition.
  • This air flow causes droplets of liquid in the receiving chamber of the wrung product, which is a drawback for certain uses, in particular in sugar refinery where the humidification of the crystals promotes their agglomeration and the formation of deposits.
  • Another solution consists in hydraulically isolating the space delimited by the partition and the skirt of the second chamber by associating with the skirt a baffle fixed on the partition and comprising a part in the form of a truncated cone whose angle at the top is very open and the inner edge of which is located slightly above the lower edge of the skirt so that the liquid collected by the skirt at the outlet of the basket is projected in a sheet on the underside of the truncated cone, a gasket hydraulic sealing being provided between the lower edge of the baffle and the partition.
  • This solution gives satisfactory results when the liquid is relatively viscous, but with more fluid liquids the sealing is less good, probably because the liquid film which is on the upper face of the baffle instead of returning to the chamber. liquid through the space provided between the outer edge of the baffle and the partition and the hydraulic seal is again dispersed into fine droplets by the air current created by the rotation of the skirt.
  • the object of the present invention is to improve the known solutions with a view to ensuring good sealing even with liquids of low viscosity.
  • the centrifugal wringer object of the invention, is characterized in that it comprises, in the annular space delimited by the skirt of the basket, the partition separating the two chambers and a circular baffle fixed on the partition and the inner edge is located a short distance from the skirt, a droplet trap constituted by a mattress of entangled threads and arranged all along the partition, on its entire periphery, so that the droplets suspended in the air stream are captured by the trap and flow by gravity into the liquid receiving chamber through openings drilled in the baffle or passages made between the outer edge of the latter and the partition.
  • the trap can be constituted by a mattress of metallic or synthetic threads, knitted or woven loosely enough so that the droplets can penetrate easily.
  • the thickness of the mattress must be sufficient for the droplets to be sheltered from the air current generated by the rotation of the skirt; in practice a thickness of 1 to 2 cm is suitable.
  • the mattress can be pressed against the interior face of the partition, between its upper edge and the baffle, or be in contact with the partition only by its upper part, its lower part being away from the partition and fixed on chicanery.
  • a seal formed by a rubber ring is placed between the upper edge of the partition and the basket.
  • This screen can be constituted, for example, by a cylindrical ferrule concentric with the basket and a ring fixed to this ferrule, substantially at the level of the lower edge of the skirt, and the outer edge of which is located a short distance from the skirt.
  • the centrifugal wringer shown in FIG. 1 comprises a conical basket 10 with a full wall, flared upwards and rotating around a vertical pivot 12 which is supported by the tank 14 of the machine.
  • This tank is divided by a circular section partition 16 into a chamber for receiving the liquid 18 provided with a bottom 19 and a chamber for receiving the wrung products 20.
  • the inner surface of the basket is covered with a screen 22 which is kept spaced from this surface by suitable spacing means allowing the liquid having passed through the screen to flow to the upper end of the basket where it is discharged. by holes or slots 24 provided at this end.
  • a frustoconical skirt 26 On the upper edge of the basket is attached a frustoconical skirt 26 which is full and flared downwards. At its lower end, this skirt is provided with a rim 28 situated slightly below the inner edge of a baffle 30 constituted by a very open truncated cone extending downwards by a cylindrical wall fixed by means of spacers on the partition 16, a short distance from the latter; the lower end of the baffle 30 plunges into a circular channel 32 fixed to the partition 16.
  • a mattress 33 of entangled threads for example knitted or woven, is fixed on the inner face of the partition 16, in the space 35 delimited by the latter, the skirt 26 and the baffle 30, and all around the partition .
  • a rubber ring 34 is fixed to the upper edge of the partition 16 and constitutes a seal isolating the aforementioned space from the chamber 20.
  • a cylindrical ferrule 36 fixed on the bottom of the chamber 18 and a ring 38 fixed on the latter, at the level of the rim 28 of the skirt 26, constitute a screen isolating the basket from the chamber 18 in order to reduce the ventilation generated in this chamber by the rotation of the basket.
  • the liquid having filtered through the sieve flows on the interior surface of the basket to its upper end where it is discharged through the orifices 24, and projected onto the interior surface of the skirt 26; it then flows to the lower end of the skirt from which it escapes in a horizontal sheet, under the action of centrifugal force.
  • This sheet is projected onto the baffle 30 and the liquid flowing along the vertical part of the latter falls into the channel 32 from which it pours by overflow into the chamber 18.
  • the other part of the liquid which has entered the space 35 is sprayed into fine droplets by the air current created by the rotation of the basket.
  • These droplets are in drawn by the air stream to the partition 16 and penetrates in the tren t son mattress 33 which constitutes a trap where the droplets are sheltered from the air stream and can flow by gravity to its lower part from which they fall into the space formed between the partition 16 and the vertical part of the baffle 30.
  • the baffle 30 ' is constituted by a ring fixed to the partition 16 by its outer edge and pierced, near this edge, with openings 40 serving to evacuate towards the chamber 18 the liquid s 'dripping from the trap 33 ".
  • the droplet trap could also be placed between the partition 16 and the baffle 30', as in the variant of FIG. 3.
  • the invention can in particular be used in sweets for the spinning of mass-cooked.

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  • Centrifugal Separators (AREA)
EP80401139A 1980-08-01 1980-08-01 Kontinuierlich arbeitende Siebzentrifugen Expired EP0045336B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8080401139T DE3066973D1 (en) 1980-08-01 1980-08-01 Continuously operating centrifugal strainers
EP80401139A EP0045336B1 (de) 1980-08-01 1980-08-01 Kontinuierlich arbeitende Siebzentrifugen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80401139A EP0045336B1 (de) 1980-08-01 1980-08-01 Kontinuierlich arbeitende Siebzentrifugen

Publications (2)

Publication Number Publication Date
EP0045336A1 true EP0045336A1 (de) 1982-02-10
EP0045336B1 EP0045336B1 (de) 1984-03-14

Family

ID=8187389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401139A Expired EP0045336B1 (de) 1980-08-01 1980-08-01 Kontinuierlich arbeitende Siebzentrifugen

Country Status (2)

Country Link
EP (1) EP0045336B1 (de)
DE (1) DE3066973D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10391682B2 (en) 2013-08-13 2019-08-27 Macdermid Graphics Solutions Llc Apparatus for thermal processing of flexographic printing elements

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2279472A1 (fr) * 1974-07-26 1976-02-20 Braunschweigische Masch Bau Centrifugeuse a fonctionnement continu, en particulier centrifugeuse a sucre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061711B (de) * 1955-07-22 1959-07-23 Stamicarbon Verfahren und Vorrichtung zur Entwaesserung eines fein- bis feinst-koernigen Festgut-Fluessigkeits-Gemenges
DE1208253B (de) * 1961-07-26 1965-12-30 Braunschweigische Maschb Ansta Kontinuierlich arbeitende Zuckerzentrifuge
FR1468189A (fr) * 1965-03-27 1967-02-03 Hein Essoreuse pour la séparation continue des constituants des mélanges de matières solides et de matières liquides, notamment turbine à sucre

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2279472A1 (fr) * 1974-07-26 1976-02-20 Braunschweigische Masch Bau Centrifugeuse a fonctionnement continu, en particulier centrifugeuse a sucre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10391682B2 (en) 2013-08-13 2019-08-27 Macdermid Graphics Solutions Llc Apparatus for thermal processing of flexographic printing elements

Also Published As

Publication number Publication date
EP0045336B1 (de) 1984-03-14
DE3066973D1 (en) 1984-04-19

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