EP2326427A1 - Centrifuge with a self-emptying centrifuge drum - Google Patents
Centrifuge with a self-emptying centrifuge drumInfo
- Publication number
- EP2326427A1 EP2326427A1 EP09783343A EP09783343A EP2326427A1 EP 2326427 A1 EP2326427 A1 EP 2326427A1 EP 09783343 A EP09783343 A EP 09783343A EP 09783343 A EP09783343 A EP 09783343A EP 2326427 A1 EP2326427 A1 EP 2326427A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closing chamber
- recesses
- centrifuge according
- closing
- drum
- 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
Links
- 239000007787 solid Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000010276 construction Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
- B04B1/16—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl
- B04B1/18—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl controlled by the centrifugal force of an auxiliary liquid
Definitions
- the invention relates to a centrifuge with a self-emptying centrifugal drum according to the preamble of claim 1.
- a centrifuge with a self-cleaning centrifugal drum is known from DE-OS 19 09 996. Further developed constructions are shown in DE 32 08 808 A1, 32 40 093 A1, DE 35 09 139 C1, DE 35 24 731 C1 and DE 36 07 526 A1. Although these solutions - known under the name Hydrostop - can be used to precisely control partial discharges in particular, they are relatively complex constructions in each case.
- the object of the invention is to create a centrifuge optimized with regard to its emptying behavior with simple structural means.
- the construction according to the invention achieves an optimized emptying behavior with simple constructional means, which is in particular due to a rapidly initiated and relatively large evacuation stroke and a rapidly initiated one Signs closing, which leads to a rapid reduction of Austragsspalt- height.
- FIG. 1 shows a section through a portion of a centrifugal drum according to the invention.
- FIG. 2 is a diagram showing the stroke of the piston slide over time with a centrifugal drum of the type of Figure 1;
- Fig. 3 is a diagram showing the stroke of the piston slide over time with a known centrifugal drum; and
- FIG. 4 shows a further section according to the invention, shown schematically in section
- a material to be processed - a solid-liquid mixture - is fed through a central inlet 22 (see insofar as the schematically illustrated construction of FIG. 4) to a rotatable drum 1 of a (plate) separator with a vertical axis of rotation, which has a centrifugal space 2 which is divided into a separation space 3 and a solid space 4.
- the solid space 4 is bounded on one side - here downwards - by an axially movable piston slide 5, which releases or closes ejection openings 7 for the solids during its axial movements in the drum shell 6.
- a closing chamber 8 which can be acted upon with closing fluid is formed.
- closing liquid can be introduced through an injection chamber 9 and a supply line.
- This closing fluid can be switched by one or more leads 11, in which one or more piston valves 12 are discharged from the drum 1, to which the piston valve 12 is acted upon by opening water, which is passed through an injection chamber 13 for opening water and a supply line 14 to the piston valve 12.
- the function of such a piston valve 12 is known per se in the field of self-draining separators.
- Opening water and closing water are sprayed by means of control water supply lines 22a, b through two separate water supply lines into the injection chambers 13 and 9, respectively, into the drum.
- valve piston moves outward (by the centrifugal force) and closes the bore 11.
- the spool 5 moves up again , which closes the drum 1.
- the closing chamber height that is to say the distance between the inner wall of the drum and the spool in the region of the closing chamber 8, is kept relatively low, preferably the height is 0.3 mm to 5 mm, in particular 0.5 to 1.5 mm.
- the volume of closed water is kept low.
- the height of the chamber significantly affects the rate of evacuation.
- a defined increment of the closing chamber 8 is set to a predetermined diameter of the closing chamber.
- the height of the closing chamber 8 preferably multiplies in the region of this increment, preferably the height of the closing chamber 8 in the region of the recesses 17 is three to fifteen times the gap height of the closing chamber 8 in the area adjacent to or outside of the recesses 17, in particular 3 to 20 mm, more preferably 5 to 12 mm, in particular 10 mm.
- this increment is introduced in the region of the lower part of the piston slide.
- This reversal range of the angle of the spool is usually - viewed from the outside diameter of the spool - between one third and two thirds of its radius.
- the spool has here on its underside in its inner and outer edge region circumference sokocarditch 20, 21 for better acceptance and for better removal of the closing water.
- the invention can be realized, for example, in a simple manner by inserting recesses 17 on a certain diameter into the side of the piston slide 6 facing the closing chamber, for example two or more circumferentially distributed cutouts.
- the recesses 17 lead to an optimized emptying behavior, as shown by way of example in FIG. 2.
- results from the gap broadening in the recesses 17 - which may be designed, for example, as recesses - an au automatic and at the beginning of the closing process very fast closing behavior, except for a small residual gap.
- the recesses 17 also increase the insensitivity to valve timing variations, so that even a metering piston, which serves to adjust and control of partial discharges, can be dispensed with, which reduces the cost of construction over known solutions.
- the cut-outs 17 are designed according to the type of product to be processed and the emptying (partial emptying) to be performed, which may for example be carried out empirically with the aid of experiments, until a characteristic of the type of FIG. 2 with a relatively large, fast to a maximum value increasing opening stroke and a relatively fast stopping the emptying results.
- the piston slide of FIG. 1 has, starting from a radius R17 in the region of the cutouts radially inwardly and outwardly double conical shape, wherein the cutouts 17 are formed in the transition region 17 between the two conical regions 18 and 19 by way of example as two variants ,
- the comparison of the discharge characteristics as shown in Figs. 2 and 3 was carried out by way of example with a separator of the type MSD 300 of the applicant.
- the lifting height of 100% refers to the mechanically realizable possibility of movement of the piston slide between the drum cover and the drum base.
- the time base of, for example, 1 sec refers to the control of the upstream solenoid valve for supplying the opening water.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810048934 DE102008048934A1 (en) | 2008-09-25 | 2008-09-25 | Centrifuge with a self-cleaning centrifugal drum |
PCT/EP2009/062339 WO2010034751A1 (en) | 2008-09-25 | 2009-09-23 | Centrifuge with a self-emptying centrifuge drum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2326427A1 true EP2326427A1 (en) | 2011-06-01 |
EP2326427B1 EP2326427B1 (en) | 2017-01-11 |
Family
ID=41422648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09783343.8A Active EP2326427B1 (en) | 2008-09-25 | 2009-09-23 | Centrifuge having a selfdischarging bowl |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2326427B1 (en) |
CN (1) | CN102164679B (en) |
DE (1) | DE102008048934A1 (en) |
WO (1) | WO2010034751A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2774684B1 (en) * | 2013-03-06 | 2018-10-17 | Alfa Laval Corporate AB | A centrifugal separator |
EP2808086A1 (en) | 2013-05-27 | 2014-12-03 | Alfa Laval Corporate AB | Centrifugal separator and method for determining suitable moment for removal of heavy phase content |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK117207B (en) * | 1960-04-20 | 1970-03-23 | Separator Ab | Sludge centrifuge. |
SE321896B (en) | 1968-02-29 | 1970-03-16 | Alfa Laval Ab | |
DE3012108C2 (en) * | 1980-03-28 | 1982-09-23 | Westfalia Separator Ag, 4740 Oelde | Self-emptying centrifugal drum |
DE3208808C2 (en) | 1982-03-11 | 1984-11-22 | Westfalia Separator Ag, 4740 Oelde | Centrifuge with a self-cleaning centrifugal drum |
DE3240093C2 (en) | 1982-10-29 | 1986-03-27 | Westfalia Separator Ag, 4740 Oelde | Centrifuge with a self-cleaning centrifugal drum |
DE3240998C2 (en) * | 1982-11-06 | 1985-05-30 | Westfalia Separator Ag, 4740 Oelde | Centrifuge with a self-cleaning centrifugal drum |
DE3607526A1 (en) | 1985-03-14 | 1987-09-10 | Westfalia Separator Ag | Centrifuge with a self-emptying centrifuge drum |
DE3509139C1 (en) | 1985-03-14 | 1986-04-17 | Westfalia Separator Ag, 4740 Oelde | Centrifuge with a self-draining centrifuge |
DE3524731C1 (en) | 1985-07-11 | 1986-11-27 | Westfalia Separator Ag, 4740 Oelde | Centrifuge with a self-draining centrifuge |
DE4436459C2 (en) * | 1994-10-12 | 1997-04-24 | Flottweg Gmbh | Centrifugal drum |
SE510541C2 (en) * | 1997-09-29 | 1999-05-31 | Alfa Laval Ab | Centrifugal separator control device |
SE529562C2 (en) * | 2006-02-13 | 2007-09-18 | Alfa Laval Corp Ab | Ways of monitoring centrifugal separator |
-
2008
- 2008-09-25 DE DE200810048934 patent/DE102008048934A1/en not_active Withdrawn
-
2009
- 2009-09-23 CN CN200980137322.8A patent/CN102164679B/en not_active Expired - Fee Related
- 2009-09-23 EP EP09783343.8A patent/EP2326427B1/en active Active
- 2009-09-23 WO PCT/EP2009/062339 patent/WO2010034751A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010034751A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102164679B (en) | 2016-03-30 |
WO2010034751A1 (en) | 2010-04-01 |
DE102008048934A1 (en) | 2010-04-01 |
CN102164679A (en) | 2011-08-24 |
EP2326427B1 (en) | 2017-01-11 |
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