Filter device

Abstract

A filter device including a stationary head piece and a movable end piece and a pack of adjacent elements including a recess plate, wherein the pack is arranged between the stationary head piece and the movable end piece, wherein the recess plate includes a base element including a recess forming a filter chamber between the adjacent elements, wherein the filter device includes a filter membrane between the adjacent elements, wherein the filter membrane retains a solid content of a suspension as a filter cake and allows a remaining liquid fraction of the suspension to pass as a filtrate, wherein the recess plate includes a fluid pipe discharging the filtrate, which fluid pipe runs along a narrow edge of the base element, wherein the recess plate includes a fluid duct that connects the fluid pipe to the filter chamber.

Claims

1. A filter device, comprising: a stationary head piece; a movable end piece; and a pack of adjacent elements including a recess plate, wherein the pack is arranged between the stationary head piece and the movable end piece, wherein the recess plate includes a base element including a recess forming a filter chamber between the adjacent elements, wherein the filter device includes a filter membrane between the adjacent elements, wherein the filter membrane retains a solid content of a suspension as a filter cake and allows a remaining liquid fraction of the suspension to pass as a filtrate, wherein the recess plate includes a fluid pipe discharging the filtrate, wherein the fluid pipe runs along a narrow edge of the base element and the narrow edge is parallel to the recess plate, wherein the recess plate includes a fluid duct that connects the fluid pipe to the filter chamber, wherein the recess plate includes an extension that is connected to the narrow edge of the base element, wherein the fluid pipe runs between the base element and the extension, and wherein the base element and the extension are separate components assembled together.

2. The filter device according to claim 1, wherein the extension is a second base element including a second fluid duct that connects the fluid pipe to a second filter chamber.

3. The filter device according to claim 1, wherein the extension is clipped to the base element.

4. The filter device according to claim 1, further comprising a support running along the fluid pipe and supporting the recess plate.

5. The filter device according to claim 4, further comprising a cavity inside the support for piping the fluid.

6. The filter device according to claim 5, wherein the support is clipped to the base element or to the extension.

7. The filter device according to claim 5, wherein the support is clipped to the base element and to the extension.

8. The filter device according to claim 1, wherein the narrow edge is a vertical narrow edge.

9. The filter device according to claim 1, wherein the fluid pipe is enveloped by the base element and the extension.

10. The filter device according to claim 1, wherein the pack of adjacent elements is vertically stacked on top of each other or hanging side by side.

11. The filter device according to claim 10, wherein the pack of adjacent elements is hanging side by side.

12. The filter device according to claim 11, wherein the narrow edge is a vertical narrow edge.

13. The filter device according to claim 1, wherein the base element includes check rails that are barbed and interlock, and the extension includes profiles that are barbed and interlock.

14. The filter device according to claim 1, wherein the recess plate includes three edges other than the narrow edge and the fluid pipe is absent from the three edges.

15. The filter device according to claim 1, wherein the recess plate includes three edges other than the narrow edge and the extension is absent from the three edges.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The method according to the invention and the associated recess plate and filter device are subsequently described in more detail with reference to advantageous embodiments, illustrated in the drawing Figures, wherein:

(2) FIG. 1a illustrates a front view of a first recess plate;

(3) FIG. 1b illustrates a detail cut through this first recess plate;

(4) FIG. 2a illustrates a front view of a second recess plate;

(5) FIG. 2b illustrates a detail cut through this second recess plate;

(6) FIG. 2c illustrates a detail of this cut;

(7) FIG. 3 illustrates a detail cut through a third recess plate;

(8) FIG. 4 illustrates a detail of a cut through a fourth recess plate;

(9) FIG. 5 illustrates a detail of a cut through a fifth recess plate;

(10) FIG. 6 illustrates a detail of a cut through a sixth recess plate;

(11) FIG. 7 illustrates a detail of a cut through a seventh recess plate;

(12) FIG. 8 illustrates a detail of a cut through a eighth recess plate; and

(13) FIG. 9 illustrates a block diagram of the filter device according to the invention with the recess plate

DETAILED DESCRIPTION OF THE INVENTION

(14) The first recess plate 1 of a filter device according to the invention illustrated in FIGS. 1a and 1b has a base element 2 and an extension 3 that is connected to a vertical narrow edge 4 of the base element 2. The first recess plate 1 is part of a first filter device, having a stationary head piece and a movable end piece, and a pack, of first recess plates 1 and other recess plates. In the pack, the first recess plates 1 and other recess plates are hanging side by side in an alternating sequence. The filter device is secured by hydraulic force. Each filter chamber is equipped with two filter cloths, where the suspension is filled in between the filter cloths and permeating to both adjacent recess plates 1. The first recess plates 1 and the other recess plates are made of polypropylene.

(15) FIG. 9 illustrates the filter device 61 with the recess plate 1 included in the pack 62 including adjacent elements 65, wherein the pack is supported in the filter device between a stationary head piece 63 and a movable end piece 64.

(16) The base element 2 of the first recess plate 1 has recesses 5 on the front face, and on the back face. The first recess plate 1a so called membrane platehas a movable membrane 6, attached to each of the recesses 5. The membranes 6 and the respective recesses 5 enclose two squeezing chambers 7 that may be loaded with a squeezing fluid for mechanically pressing the remaining filter cake. The other recess plate (not illustrated)a so called chamber plateof the first filter device is basically similar to the first recess plate 1, but has no membranes attached to the recesses 5.

(17) Attached to the base element 2, the first recess plate 1 has two filtrate shoes for discharging the filtrate from the filter chamber into a fluid duct 9 that opens into a fluid pipe 10 running along the narrow edge 4 between the base element 2 and the extension 3. The fluid pipe 10 connects to a filtrate drain 11 in the extension 3 that runs through the pack, back to the head piece.

(18) Both the base element 2 and the extension 3 have recesses 12 running along the narrow edge 4 that form the fluid pipe 10. The base element 2 has outer check rails 13 that protrude from the narrow edge 4. The extension 3 has corresponding inner profiles 14, that protrude towards the base element 2, and that fit between the check rails 13 of the base element 2. Two sealing elements 15 are clamped between the check rails 13 and the corresponding profiles 14, sealing the fluid pipe 10 from the ambience of the first recess plate 1. The base element 2 and the extension 3 of the first recess plate 1 are clipped together by means of the sealing elements 15 and connected by an external frame (not illustrated).

(19) The second recess plate 16 of the filter device according to the invention illustrated in FIGS. 2a, 2b and 2c has a first base element 17 and (as an extension) a second base element 18. Apart from different geometries the second recess plate 16 is part of a second filter device that resembles the first filter device mentioned above, and the base elements 17, 18 of the second recess plate 16 resemble the base element 2 of the first recess plate 1.

(20) Apart from the second recess plate 16, the second filter device and its further parts are not illustrated. Basically identical features of the second recess plate 16 and its base elements 17, 18 are marked according to the first recess plate 1.

(21) The base elements of the second recess plate 16 each have two fluid ducts 19 for discharging the filtrate from the respective recesses into a common fluid pipe 20 between the base elements. From the fluid pipe 20, the filtrate is discharged to the ambient, and to a collecting hutch (not illustrated) underneath the second recess plate 16.

(22) The third recess plate 21 of a filter device according to the invention, illustrated in FIG. 3, is part of the second filter device, basically resembles the second recess plate 16, and forms the pack in an alternating sequence with the second filter plate. Whereas the second recess plate 16 is a so-called chamber plate, having no membranes, the third recess plate 21 is a so-called membrane plate. The fluid pipe 22 of the third recess plate 21 connects to fluid ducts 23 for distributing a squeezing fluid into the respective squeezing chambers 24.

(23) FIG. 4 illustrates a detail of an alternative geometry for connecting the base element 25 and the extension 26 of a fourth recess plate that is basically similar to the first recess plate 1, but not illustrated further. The check rails 27 of the base element 25 and the profiles 28 of the extension 26 both are barbed and interlock when assembling the fourth recess plate.

(24) FIG. 5 illustrates a detail of a further alternative geometry for connecting two identical base elements 29 of a fifth recess plate, that are basically similar to the base element 25 of the fourth recess plate, but further not illustrated. Each base element 29 has a barbed check rail 30 corresponding to a barbed profile 31 of the respective other base element 29.

(25) FIG. 6 illustrates a detail of a further alternative geometry for connecting two identical base elements 32 of a sixth recess plate, that is basically similar to the fifth recess plate, but further not illustrated. The check rails 33 and the profiles 34 of the sixth recess plate are not barbed. The sixth recess plate has two sealing elements 35 between the corresponding check rails and profiles. The base elements of the sixth recess plate are clipped together by means of the sealing elements 15 and connected by an external frame (not illustrated).

(26) FIG. 7 illustrates a detail of a further alternative geometry for connecting two identical base elements 36 of a seventh recess plate, that resembles the second recess plate 16, but is further not illustrated. The seventh recess plate has a support 37 that runs along the fluid pipe 38. The support 37 is a pipe and has a cavity 39 for piping the fluid into or collecting the fluid from the fluid ducts 40. The base elements of the seventh recess plate are connected by an external frame (not illustrated).

(27) FIG. 8 illustrates a detail of a further alternative geometry for connecting two identical base elements 41 of an eighth recess plate that resembles the seventh recess plate, but is not illustrated further. The base elements have profiles 42 that run along the narrow edge 43 and enclose the fluid pipe 44 and edges 45 protruding from the profiles 42 towards the support 46. The support 46 has two recesses 47 that clip between the edges 45, thus fixating the base elements 41 together.

REFERENCE NUMERALS AND DESIGNATIONS

(28) 1 recess plate 2 base element 3 extension 4 edge 5 recess 6 membrane 7 squeezing chamber 8 filtrate shoe 9 fluid duct 10 fluid pipe 11 filtrate drain 12 recess 13 check rail 14 profile 15 sealing element 16 recess plate 17 base element 18 base element 19 fluid duct 20 fluid pipe 21 recess plate 22 fluid pipe 23 fluid duct 24 squeezing chamber 25 base element 26 extension 27 check rail 28 profile 29 base element 30 check rail 61 filter device 62 pack 63 stationary head piece 64 movable end piece 65 adjacent elements