EP0455964A1 - Centrifugeuse - Google Patents

Centrifugeuse Download PDF

Info

Publication number: EP0455964A1
Authority: EP; European Patent Office
Prior art keywords: sieve; centrifuge; protective; basket; funnel
Prior art date: 1990-05-08
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

EP91104291A

Other languages

German (de)

English (en)

Other versions

EP0455964B1 (fr

Inventor

Günter Dipl.-Ing. Trojan

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.)

Hein Lehmann Trenn und Fordertechnik GmbH

Original Assignee

Hein Lehmann Trenn und Fordertechnik GmbH

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.)

1990-05-08

Filing date

1991-03-20

Publication date

1991-11-13

1991-03-20 Application filed by Hein Lehmann Trenn und Fordertechnik GmbH filed Critical Hein Lehmann Trenn und Fordertechnik GmbH

1991-11-13 Publication of EP0455964A1 publication Critical patent/EP0455964A1/fr

1994-06-01 Application granted granted Critical

1994-06-01 Publication of EP0455964B1 publication Critical patent/EP0455964B1/fr

2011-03-20 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

230000001681 protective effect Effects 0.000 claims abstract description 62
239000000725 suspension Substances 0.000 claims abstract description 16
239000007788 liquid Substances 0.000 claims abstract description 8
239000011362 coarse particle Substances 0.000 claims abstract description 7
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
238000007599 discharging Methods 0.000 claims 1
239000013078 crystal Substances 0.000 description 10
239000007787 solid Substances 0.000 description 9
239000000470 constituent Substances 0.000 description 5
230000001133 acceleration Effects 0.000 description 1
238000009826 distribution Methods 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
230000002093 peripheral effect Effects 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
239000011343 solid material Substances 0.000 description 1
238000005507 spraying Methods 0.000 description 1
239000006188 syrup Substances 0.000 description 1
235000020357 syrup Nutrition 0.000 description 1
238000009827 uniform distribution Methods 0.000 description 1
238000005406 washing Methods 0.000 description 1

Images

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

Definitions

the invention relates to a screen centrifuge, in particular a sugar centrifuge with an upwardly expanding, driven, conical centrifuge basket, in the area of smaller diameter of which the crystal suspension to be centrifuged is continuously added, in this area an upwardly conically expanding protective screen of smaller size than the centrifuge basket coaxial is attached, which rotates with the centrifuge basket and has sieve openings that do not let through coarse particles that could damage the centrifuge basket or a working sieve lying on the centrifuge basket.
German utility model 19 35 839 it is known to fasten a protective sieve over the working sieve of a centrifuge basket at a distance that is only such that the crystal suspension passing through the protective sieve onto the working sieve can flow along the working sieve.
the deck water required to clean the solid matter was distributed to the protective sieve via nozzles. It was accelerated on the screen surface and passed through the screen openings to the solid material lying outside on the screen. Each screen opening was effectively a separate one Nozzle that moved in the centrifugal field. Drops of water sprayed from a rotating nozzle are brought together under the influence of centrifugal force to form a few thick drops shortly after the outlet.
the object of the invention is to improve a centrifuge of the type mentioned in such a way that the mass located on the working sieve is uniformly wetted with covering liquid and transported safely, that the protective device is also less stressed and thus has a longer service life.
the first part of the object is achieved in that such a wide annular space is created between the centrifuge basket or working sieve and protective sieve that nozzles can be attached in this annular space, spraying the covering liquid directly onto the working sieve or onto the solid layer.
covering liquid or covering water can be brought directly onto the solid layer on the working screen in the intermediate space, whereby the quality and the sliding of the solid on the working screen are significantly improved and evened out.
a good washing effect is achieved because the uniform distribution of the cover liquid is not hindered by the protective sieve.
the protective screen no longer needs to be built so easily due to the greater distance from the working screen, so that it is more wear-resistant.
the coarse particles sliding over the protective sieve are advantageously conducted upwards over the centrifuge basket into the sugar chamber by a rotating funnel which has no sieve openings.
the protective sieve and funnel are advantageously not designed as a unit, but as two independently rotating components, the funnel rotating more slowly than the protective sieve and with its lower opening the upper edge of the protective screen.
a secure transfer of the coarse particles from the protective screen to the funnel is achieved when the protective screen protrudes a few centimeters into the funnel.
the protective screen needs a high speed so that large acceleration forces arise and the suspension flows completely through the relatively small protective screen openings and does not get onto the funnel, which is only supposed to transport coarse parts that are dangerous for the working screen.
a particularly evenly distributed task over the circumference of the crystal suspension passing through the protective sieve onto the bottom edge of the basket or of the working sieve is achieved if a bell that widens downward and whose upper edge is equal or lower is attached coaxially to the underside of the funnel is the upper edge of the protective sieve, the bell releasing the suspension passing through the protective sieve onto the lower edge of the basket or the working sieve.
the bell rotates at the same speed as the funnel and therefore slower than the basket. This leads to an even distribution of the crystal suspension on the sieve.
a centrifuge particularly for the production of sugar, has a conically expanding basket 1, the axis of rotation of which is perpendicular and which is driven by a motor 2.
the basket 1 On its inside, the basket 1 carries a conical work screen 3, the surface of which is parallel to the wall of the basket 1.
a truncated cone-shaped protective screen 4 coaxially attached, which widens upwards and whose height is less than half that of the working screen 3.
the diameter of the protective screen 4 is less than half the size of the diameter of the working sieve 3 at the same height, so that between the protective sieve 4 and the working sieve 3 there is an annular space 5, the width of which is so large that tubes 6 can extend into this intermediate space, the nozzles 7 of which deliver deck water to the working sieve 3.
a truncated cone-shaped funnel 8 which widens upwards, is mounted coaxially and rotatably, which is driven by a separate drive 9.
the lower edge 8a of the funnel 8 protrudes outside over the upper edge 4a of the protective screen, the diameter of the edge 8a being chosen only slightly larger than the diameter of the edge 4a.
the protective screen 4 can transfer coarse parts to the funnel 8, which has no openings and transfers the coarse parts with its upper edge 8b to a channel 9 which is arranged in a circular and coaxial manner around the upper edge of the funnel 8 in a rotationally fixed manner.
the speed of the transport funnel 8 is always lower than that of the basket 1 or the working screen 3.
the mass or suspension to be centrifuged is fed via a coaxial filling tube 10, which projects with its lower end into the protective screen 4, so that the mass reaches the bottom of the basket 1 and from there to the inner wall of the protective screen 4. Except for the coarse constituents, the mass passes through the protective sieve 4 to the lower region of the working sieve 3, where the more liquid constituents reach the basket wall relatively early through the working sieve 3 and the remaining constituents flow upwards and are wetted by the nozzles 7.
the coarse constituents reach the funnel 8 from the upper edge of the protective sieve 4, which releases these constituents upwards to the channel 9.
the funnel 8 is approximately an extension of the protective screen 4 in terms of arrangement and dimensions, but is a part separated from the protective screen 4 at different speeds.
the funnel 8 can also be fastened to the protective screen 4, in particular in one piece with it, so that the wall of the protective screen 4 merges with the wall of the funnel 8 and differs from that of the protective screen in that it is in the region of the Funnel has no openings.
the funnel 8 is not driven separately, but rotates at the same speed with the protective screen.
a tube 11 can be laterally displaced and arranged axially parallel to the feed pipe 10, through the nozzles 12 of which steam is applied to the inner wall of the protective screen 4 and the floor. Can also go through a pipe 14 ( Figure 2) water are abandoned.
a bell 13 which widens downward is coaxially fastened to the underside of the funnel 8, the upper edge 13a of which is equal to or lower than the upper edge 4a of the protective screen 4.
the bell 13 gives the one coming through the protective screen 4 Mass from the lower edge of the basket 1 or the work screen 3.
the bell 13 has no sieve openings and has the shape of a hollow truncated cone.

Landscapes

Centrifugal Separators (AREA)

EP91104291A 1990-05-08 1991-03-20 Centrifugeuse Expired - Lifetime EP0455964B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4014664A DE4014664A1 (de)	1990-05-08	1990-05-08	Zentrifuge
DE4014664		1990-05-08

Publications (2)

Publication Number	Publication Date
EP0455964A1 true EP0455964A1 (fr)	1991-11-13
EP0455964B1 EP0455964B1 (fr)	1994-06-01

Family

ID=6405911

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP91104291A Expired - Lifetime EP0455964B1 (fr)	1990-05-08	1991-03-20	Centrifugeuse

Country Status (4)

Country	Link
EP (1)	EP0455964B1 (fr)
AT (1)	ATE106280T1 (fr)
DE (2)	DE4014664A1 (fr)
ES (1)	ES2054386T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2685006A1 (fr) *	1991-12-13	1993-06-18	Silver Eng Works	Appareil et procede pour reduire la deterioration des cristaux de sucre dans une centrifugeuse.
DE19729036A1 (de) *	1997-07-08	1999-01-14	Hein Lehmann Trenn Foerder	Siebblech mit Spannhilfe
WO2009039291A3 (fr) *	2007-09-19	2009-05-07	George A Holmes	Ensemble de séchoir centrifuge de granules et de déshumidification
DE202014010380U1 (de)	2014-06-27	2015-06-03	Hein, Lehmann Gmbh	Schleuderkorb

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1444790A (fr) *	1965-05-18	1966-07-08	Fives Lille Cail	Dispositif d'alimentation pour essoreuse centrifuge à marche continue
DE2930312A1 (de) *	1979-07-26	1981-02-12	Krauss Maffei Ag	Siebzentrifuge
DE2462922B2 (de) *	1974-12-18	1981-04-16	Krauss-Maffei AG, 8000 München	Prallringzentrifuge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2274361A1 (fr) *	1974-06-17	1976-01-09	Fives Cail Babcock	Systeme d'alimentation avec injection de vapeur pour essoreuse centrifuge
DE2841725C2 (de) *	1978-09-25	1987-02-12	Hein, Lehmann AG, 4000 Düsseldorf	Vorrichtung zum Beschicken einer kontinuierlich arbeitenden Zentrifuge

1990
- 1990-05-08 DE DE4014664A patent/DE4014664A1/de not_active Ceased
1991
- 1991-03-20 DE DE59101762T patent/DE59101762D1/de not_active Expired - Fee Related
- 1991-03-20 ES ES91104291T patent/ES2054386T3/es not_active Expired - Lifetime
- 1991-03-20 EP EP91104291A patent/EP0455964B1/fr not_active Expired - Lifetime
- 1991-03-20 AT AT91104291T patent/ATE106280T1/de not_active IP Right Cessation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1444790A (fr) *	1965-05-18	1966-07-08	Fives Lille Cail	Dispositif d'alimentation pour essoreuse centrifuge à marche continue
DE2462922B2 (de) *	1974-12-18	1981-04-16	Krauss-Maffei AG, 8000 München	Prallringzentrifuge
DE2930312A1 (de) *	1979-07-26	1981-02-12	Krauss Maffei Ag	Siebzentrifuge

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2685006A1 (fr) *	1991-12-13	1993-06-18	Silver Eng Works	Appareil et procede pour reduire la deterioration des cristaux de sucre dans une centrifugeuse.
DE19729036A1 (de) *	1997-07-08	1999-01-14	Hein Lehmann Trenn Foerder	Siebblech mit Spannhilfe
DE19729036B4 (de) *	1997-07-08	2005-08-11	Hein, Lehmann Trenn- und Fördertechnik GmbH	Siebblech mit Spannhilfe
WO2009039291A3 (fr) *	2007-09-19	2009-05-07	George A Holmes	Ensemble de séchoir centrifuge de granules et de déshumidification
DE202014010380U1 (de)	2014-06-27	2015-06-03	Hein, Lehmann Gmbh	Schleuderkorb
DE102014009332A1 (de)	2014-06-27	2015-12-31	Hein, Lehmann Gmbh	Schleuderkorb

Also Published As

Publication number	Publication date
DE4014664A1 (de)	1991-11-14
EP0455964B1 (fr)	1994-06-01
ATE106280T1 (de)	1994-06-15
DE59101762D1 (de)	1994-07-07
ES2054386T3 (es)	1994-08-01

Legal Events

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1991-09-27	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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DE68913037T2 (de)	1994-05-11	Verfahren und vorrichtung zum fraktionieren von suspensionen.
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