JPH0634706U - Pressing filter plate in pressing filter press - Google Patents

Abstract

(57) [Summary] [Purpose] A drainage member such as a net or a sheet laid on the compression membrane of a compression filter plate in a compression type filter press can be easily attached to and removed from the periphery of the raw material hole of the compression membrane. Support the filtration surface. [Structure] A pair of squeezing membranes are arranged on both sides of the filter plate base material, and the undiluted solution holes of the drainage member laid on the filtering surface of the squeezing membrane are sandwiched by tightening plates that tightly tighten the undiluted solution holes of the squeezed membrane from both sides. Further, the drainage member and the tightening plate are connected by a connecting member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a press filter plate in a press filter press.

[0002]

[Prior art]

 Conventionally, a drainage member is laid on the filtration surface of a press filter plate in a filter press having a press membrane, and the press filter plate is covered with a filter cloth from above the drain member, and the filter cloth and the filter cloth of the adjacent filter plate are placed between the filter cloth and the filter cloth. It is known that the undiluted solution is supplied to the filtration chamber formed in step 1 to perform filtration, and the filtered solution filtered by the filter cloth is discharged to the outside of the machine through the drain member. In this case, the drainage member should be hung across the squeeze membrane or inserted around the squeeze membrane into the groove provided around the filter plate substrate, and pressed together with the periphery of the drainage member by embedded packing and fixed to the base plate. To do. In addition, the drainage member is fastened from both sides by using flange-shaped fastening fittings in the undiluted solution hole that penetrates the filtration surface of the squeeze membrane.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned method of fixing the drainage member to the squeeze membrane has a complicated structure and requires a fixing work. Care must be taken not to damage the squeeze membrane during the drainage member replacement work. Also, if the periphery of the drainage member and the undiluted solution hole are fixed to the squeeze membrane, the drainage member will suppress the swelling of the squeeze membrane, and the squeeze membrane may expand forcibly and the squeeze membrane or the drainage member may break. .

The present invention aims to eliminate the drawbacks of the conventional method of attaching the drainage member, and easily attaches the drainage member to the undiluted solution hole of the squeeze membrane to support it on the filtration surface to facilitate the filtration and squeezing work. It is intended to provide a squeezing filter plate in a squeezing filter press that can be performed.

[0005]

[Means for Solving the Problems]

 The squeezing filter plate in the squeezing filter press according to the present invention comprises a filter plate base material and a pair of squeeze membranes which are arranged on both sides of the filter plate base material and are connected to each other at the peripheral portions of the undiluted solution holes penetrating each filtering surface. And a drainage member, such as a mesh or a sheet, which is placed on both sides of the squeeze membrane and is covered with a filter cloth on both sides together with the squeeze membrane. In the squeezing filter plate of the type filter press, a pair of undiluted solution hole tightening plates are applied to the periphery of the undiluted solution hole of the squeezed film through the drainage member, and the pair of unpressurized film tightening plates are tightened from both sides. The peripheral edges of the undiluted solution holes of the above are airtightly connected to each other and the undiluted solution holes of the drainage members on both sides are sandwiched between the squeeze membrane and the undiluted solution hole clamping plate. , Fix one end to the undiluted solution hole tightening plate and drain the other end. Are connected by a connecting member hooking members, the squeezing film and the drainage member is configured to be covered by the filter cloth to be applied to both sides.

In addition, the thickness of the outer peripheral portion of the pair of undiluted liquid hole clamping plates is made thinner than the thickness of the surroundings of the undiluted liquid hole, and drainage is performed between the outer peripheral surface of the thin wall and the undiluted liquid hole periphery of the compressed film. A gap is formed in which the peripheral edge of the raw material hole of the member is inserted, and the raw material hole of the drainage member is inserted and sandwiched in the gap. It may be configured such that the periphery of the undiluted solution hole of the compressed film is airtightly connected by tightening the above-mentioned tightening plates on both sides.

[0007]

[Operation effect]

 A pair of squeeze membranes having undiluted liquid holes penetrating the filtration surface are placed on both sides of the filter plate base material so that the frame part is sandwiched, and a drainage member such as a mesh or sheet is laid on the filtration surface of the squeeze membrane. Apply a pair of undiluted solution hole clamping plates to the undiluted solution hole periphery of the squeeze membrane through the drainage member and tighten from both sides. The drainage member is sandwiched between the undiluted solution hole periphery of the squeeze membrane and the undiluted solution hole fastening plate, and the undiluted solution holes of the pair of squeeze film are airtightly connected. Also, the drainage member is connected to the undiluted solution hole tightening plate, and one end is fixed to the undiluted solution hole tightening plate and the other end is connected to the drainage member by a connecting member, so the drainage member does not move to the left and right of the filtration surface around the undiluted solution hole. Is supported as. Since it is not necessary to screw the drainage member into the undiluted solution hole with screws, etc., the squeeze membrane is not damaged and the drainage member can be easily attached and detached. The drainage member does not prevent the squeeze membrane from expanding at all.

In addition, the thickness of the outer peripheral portion of the pair of undiluted solution hole fastening plates is made thinner than the thickness of the peripheral portion of the undiluted solution hole to form a gap for inserting the drainage member between the thinned side and the compressed film. When inserting the drainage member into this gap and sandwiching it, the undiluted solution hole of the drainage member can be inserted into the gap around the undiluted solution hole of the undiluted solution hole tightening plate and inserted into the above-mentioned gap. There is no risk of over tightening the material. In addition, the squeeze membrane does not get damaged even if it sandwiches the drainage member, and it lasts a long time.

[0009]

【Example】

 The present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a rectangular hollow filter plate substrate, 2 is a hollow portion of the filter plate substrate 1, and 3 is a pair of compressed membranes. 4 is a spacer sandwiched between the undiluted solution holes 5 of the pair of squeezing membranes, 6 is a flat filtration surface of the squeezing membrane 3, 7 is a polypropylene net as a drainage member, and 8 is undiluted solution holes of the net 7. It is contained in the undiluted solution hole 5 of the compressed film 3. 9 is on the outer periphery of the net 7 and on an inclined surface that is inclined inward from the frame of the filter plate substrate 1. The outer periphery 9 of the drainage member may be within the flat filtration surface of the squeeze membrane 3. 10 is a tightening plate for airtightly tightening between the undiluted solution holes 5 of the squeeze membrane 3 on both sides. Reference numeral 11 is a stock solution hole of the tightening plate 10. The periphery of the stock solution hole 8 of the net 7 is sandwiched between the tightening plate 10 and the compressed film 3. The central portion of the filter plate base material 1 may be a filter bed such as a plate or a mesh, and the stock solution holes may be penetrated through the filter bed. In this case, the spacing plate 4 between the squeezing membranes on both sides may be omitted.

A child screw 14 is attached to the outer peripheral portion 12 of the tightening plate 10, and the child screw 14 and the periphery of the stock solution hole 8 of the net 7 are connected by a connecting wire 15. In the figure, one end of each wire 15 is fixed to the tightening plate 10 by the dish-shaped heads of each child screw 14 provided at three positions on one side of the stock solution hole, and the other end of each wire 15 is passed through the mesh of the net 7. It has been hung. The other end of the wire 15 may be hung at a position appropriately separated from the periphery of the stock solution hole in consideration of the material and structure of the net 7. A thin string or rod, a small flat plate, or the like may be used instead of the wire 15. Further, the wire 15 may be directly connected to the tightening plate 10 without using the child screw 14.

As the drainage member, in addition to the polypropylene net 7, there is a polyvinyl chloride net, a thin porous sheet, a wire net, or the like. Also, the drainage members should be used in a single layer or double layers. The porous sheet may have a large number of holes penetrating its surface and vertical or horizontal grooves.

Reference numeral 16 indicates a pair of filter cloths. The filter cloth 16 covers the net 7 and the squeeze membrane 3, and the periphery of the stock solution hole 17 of the filter cloth 16 loosely wraps the periphery of the stock solution hole 11 of the tightening plates 10 on both sides. The filter cloth 16 is hung from above the filter plate by a known filter cloth suspension device (not shown).

FIG. 3 is an enlarged view of the undiluted solution hole portion in FIG. FIG. 4 is a front view of the stock solution hole portion shown in FIG. In FIGS. 3 and 4, the outer peripheral portion 12 of the tightening plate 10 is thinned by cutting out the side to be pressed against the compressed film 3, and a gap 13 is formed between the notched side and the peripheral side of the raw liquid hole of the compressed film 3. And the peripheral portion of the stock solution hole of the net 7 is inserted into the gap 13. The wire 15 tightens the net 7 toward the tightening plate 10.

The squeezing filter plate in the squeezing filter press of the present invention has a handle (not shown) on a side plate (not shown) which is hung between a fixing plate (not shown) and a filter plate tightening device (not shown). Place it on and arrange freely. A movable plate (not shown) is advanced by the filter plate tightening device to tighten the rows of filter plates, and the stock solution is formed between the filter plates of the filter plates from the fixed plate side or the movable plate side through the filter plate stock solution holes. The filtrate is supplied to the filter chamber and filtered with a filter cloth, and the filtrate passes through the drainage member and flows out from the filter hole 18 of the squeeze membrane to the filtrate passage hole 19 of the filter plate substrate 1, and the squeeze membrane overlaps with the filtrate passage hole 19. It is discharged to the outside of the machine through the filtrate through hole 20 of No. 3 and the filtrate through hole 21 of the filter cloth 16. Next, a squeezing fluid is supplied between the squeezing membranes 3 of each squeezing filter plate to expand the squeezing membranes for squeezing and dehydration, and the filtrate is discharged like a cylinder. After the filtration and dehydration, the movable plates are driven backward to connect the squeezing filter plates one by one, or the squeezing filter plates are sequentially connected by a connecting tool and simultaneously moved to open the space between the filter plates to discharge cake. The squeeze filter plate of the present invention may be alternately arranged with a normal filter plate or a filter frame that does not use a squeeze film to perform the filter squeeze.

[Brief description of drawings]

FIG. 1 is a front view of a press filter plate according to the present invention.

FIG. 2 is a central vertical sectional view of FIG.

FIG. 3 is an enlarged cross-sectional view of a stock solution hole portion of FIG.

FIG. 4 is a front view of a stock solution hole portion in FIG.

[Explanation of symbols]

1 ... Filter plate substrate, 3 ... Pair of squeeze membranes, 5 ... Squeeze membrane 3
Undiluted solution hole, 7 ... Drainage net, 8 ... undiluted solution hole in net 7, 10 ... pair of undiluted solution hole tightening plates, 11 ...
Undiluted solution hole, 12 ... Outer peripheral part of tightening plate 10, 13 .. Gap, 14 ... Child screw 15 ... Wire, 16 ... Pair of filter cloths, 17 ... Undiluted solution hole of filter cloth 16

Claims (2)

[Scope of utility model registration request] 1. A filter plate substrate, a pair of squeezing membranes arranged on both sides of the filter plate substrate and connected to each other at peripheral portions of undiluted solution holes penetrating each filtration surface, and arranged on both squeezing membranes, respectively. In the squeeze filter plate in the squeezing filter press, which comprises a mesh-like or sheet-like drainage member covered with a filter cloth that is hung on both sides together with the squeeze film, the squeezing filter plate in which the squeezing fluid is supplied and discharged between the pair of squeeze films. A pair of undiluted solution hole clamping plates are applied to the periphery of the undiluted solution hole of the squeeze membrane through the members, and the peripheral portions of the undiluted solution holes of the pair of squeezed film are airtightly connected to each other by tightening the pair of undiluted solution hole fastening plates from both sides. At the same time, the peripheral edges of the raw material holes of the drainage members on both sides are sandwiched between the squeeze film and the stock solution hole fastening plate, and the drainage member is fixed to the raw solution hole fastening plate, and one end is fixed to the raw solution hole fastening plate. Connected by a connecting member that hangs the other end on the drainage member A squeeze filter plate in a squeeze filter press, wherein the squeeze film and the drainage member are covered with filter cloths hung on both sides. 2. The thickness of the outer peripheral portions of the pair of undiluted liquid hole fastening plates is made thinner than the thickness of the peripheral portions of the undiluted liquid holes, and drainage is provided between the surface of the outer peripheral portion of the thin wall and the peripheral edge of the undiluted liquid hole of the compressed film. A gap is formed in which the peripheral edge of the raw material hole of the member is inserted, and the peripheral edge of the raw material hole of the drainage member is inserted and sandwiched in the gap, and the surface around the raw material hole of the raw material hole tightening plate is the raw material hole of the compressed film. The squeeze filter plate in a squeeze filter press according to claim 1, wherein the squeezing plates on both sides are pressed against the rim so that the rims of the undiluted solution holes of the squeeze film are airtightly connected.