JPH06269614A - Filter cloth of filter press, and filter press using the filter cloth - Google Patents

Abstract

PURPOSE:To provide a filter cloth for a filter press which need not loosen a bolt when the filter cloth is removed from a filter plate, and further, need not adjust the position of a member for sealing the filter cloth, an unfiltered liquid hole on the filter cloth and an unfiltered liquid hole on a filter plate, against the filter cloth, each time the filter cloth is replaced, and is free from the contamination of the member by the unfiltered liquid as well as a filter press using the filter cloth. CONSTITUTION:Members 9, 7 for sealing the unfiltered liquid hole 10a of a filter cloth 10 and the unfiltered liquid hole 2b of the filter plate 1 are previously fixed to the filter cloth 10. Further, the unfiltered liquid hole 2b of a filter plate 1 and the unfiltered liquid hole 10a of the filter cloth 10 are sealed every time the filter plate is tightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cloth for a filter press and a filter press using the filter cloth, and more particularly to an improvement in a seal structure of a liquid concentrate hole between a filter plate and a filter cloth.

[0002]

2. Description of the Related Art Conventionally, when fixing the undiluted solution hole of a filter cloth to the undiluted solution hole of a filter plate, a sandwiching member is put on the undiluted solution solution holes of both filter cloths on both sides of the undiluted solution hole of the filter plate. There is a structure in which a hole penetrating between the sandwiching members arranged on both sides is provided, and a bolt is passed through the hole to fasten both sandwiching members to the filter plate (Japanese Patent Publication No. 3-34963).

[0003]

However, in order to remove the filter cloth from the filter plate, it is necessary to loosen the bolts.
It is complicated. Further, when the filter cloth is removed in this way, the holding member also needs to be reapplied to the filter cloth. Further, since the sandwiching member is put on the filter cloth, the sandwiching member comes into contact with the undiluted solution, and the dirt sticks to it. In order to prevent this, it was necessary to clean the filter cloth, and for this purpose the filter cloth had to be removed from the filter plate. Therefore, an object of the present invention is to solve the above-mentioned problems, and it is not necessary to loosen the bolt when removing the filter cloth from the filter plate, and the filter cloth, the stock solution hole of the filter cloth, and the stock solution hole of the filter plate can be provided. Provided are a filter press filter cloth and a filter press using the filter cloth, in which the position of the sealing member does not need to be adjusted with respect to the filter cloth every time the filter cloth is replaced, and the member is not contaminated by the undiluted solution. To do.

[0004]

In order to achieve the above object, the present invention has a member for sealing a stock solution hole of a filter cloth and a stock solution hole of a filter plate fixed to the filter cloth in advance, Each time the plate is tightened, the undiluted solution hole of the filter plate and the undiluted solution hole of the filter cloth are sealed. That is, it is a filter cloth of a filter press, which is sandwiched between adjacent filter plates and is capable of forming a filter chamber between two filter cloths facing each other in a region corresponding to the filter bed of the filter plate when tightening the filter plates. The filter plate stock solution holes are formed in the frame of the filter plate and partly inserted into the recesses when the filter plate is tightened, and the stock solution supply holes are formed in the frame of the filter plate. Correspondingly, it is formed by penetrating the stock solution hole in the center and denting a part of the periphery of the stock solution hole into a stock solution passage leading from the stock solution hole to the filter chamber located on the filter bed side of the filter plate. The seal plate covers both the front and back edges of the seal plate and can be spread to both sides through the stock solution hole of the seal plate, and the part of the seal plate that spreads to the stock solution passage side is joined to the circumference of the stock solution hole of the filter cloth. On the other hand, set the opposite side to the edge of the undiluted solution hole Polymerized configured to be provided with a sealable sealing plate supporting sheet between the recess of the inner surface of the seal plate and the filtration plate when attached filtration plate tightening.

In the above structure, when the stock solution is supplied to the filter cloth and the stock solution holes of the filter plate when the filter plate is fastened, part of the sheet and part of the filter cloth are separated by the supply pressure of the stock solution. The seal plate may be made of a material having flexibility enough to enter the stock solution passage. In the above configuration, the seal plate is a substantially annular plate having the undiluted solution hole in the center, and forms a protruding portion that projects in the radial direction from a part of the peripheral edge of the undiluted solution hole. The shape of the concave portion of the filter plate may be configured to be substantially the same as the shape of the seal plate while forming the stock solution passage. Further, the filter press according to the present invention is provided with a movable plate in which the filter cloth is arranged between the filter plates, and the filter plate is tightened while aligning the stock solution supply holes of the filter plate with the stock solution holes of the filter cloth. It can also be configured as follows.

[0006]

According to the structure of the present invention, each filter cloth is hung on and removed from each filter plate as the filter plate is tightened and unfastened, whereby the above-mentioned sheet fixed to the filter cloth is used. The supported sealing plate is fitted in the concave part of the filter plate, and at the same time the filter plate is tightened and released, the raw liquid hole between the filter cloth and the filter plate is sealed or released. Can be done. Also,
The cleaning of the filter cloth can be easily performed with the filter cloth hanging on the filter plate. Further, since the seal plate is fixed to the filter cloth by the sheet, there is no room for the undiluted solution to enter between the sheet and the filter cloth, the seal plate is not contaminated, and cleaning is not required. Further, since the sheet is attached to the filter cloth before the filter cloth is used for filtration, the sheet is not inconvenient to hang the filter cloth on the filter plate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to FIGS.
It will be described in detail based on. FIG. 1 shows an outline of the entire filter plate of the filter press provided with the filter plate of the filter press according to this example. In FIG. 1, a filter plate 1 is roughly composed of a frame 2 and a filter bed 3, and through holes are formed at four corners of the frame 2, and the through hole at the upper right corner is used as a stock solution hole 5 and the through hole at the lower right corner is formed. The holes are used as filtrate discharge holes 4. The stock solution hole 5 has the following structure. That is, as shown in FIGS.
A sealing patch cloth 9 as a sealing plate supporting sheet is fixed to the peripheral edge of the sealing plate 0a, and the sealing plate 7 is hung and supported by the cloth 9, and the sealing plate 7 is recessed in the filtering plate 1 when the filtering plate is tightened.
It is fitted in a so as to perform the sealing action of the stock solution hole 5. A stock solution hole 2b is formed through the recess 2a of the filter plate 1, and the stock solution hole 10a of the filter cloth 10 is formed.
It is possible to communicate with. The patch cloth 9 has a substantially cylindrical shape having the undiluted solution hole 9a in the center, and in addition to the cloth-made cloth,
It may be made of plastic. This seal pad 9
However, it is not always necessary to form a mesh because a filtering action is not particularly required. The one annular peripheral edge of the patch cloth 9 is fixed to the peripheral edge of the stock solution hole 10a of the filter cloth 10 by sewing or the like.

As shown in FIG. 5, the seal plate 7 is composed of a substantially annular plate having a stock solution hole 7a in the center thereof, and has a recessed stock solution passage 8 extending in a part of the peripheral edge thereof. That is, a protruding portion 7b protruding in the radial direction from a part of the peripheral edge of the undiluted solution hole 7a is formed, and the undiluted solution passage 8 is formed in the projecting portion 7b. Both the front and back sides of the peripheral edge of the seal plate 7 and the entire front and rear surfaces of the edge portion of the stock solution passage 8 are used as the seal surface 6, and the seal surface 6 is roughly covered by the annular peripheral edge of the patch cloth. The seal plate 7 may be made of metal, wood, plastic, or any material having a certain degree of hardness. This seal plate 7 has a filter cloth 1 in its stock solution hole 7a.
0 of the patch cloth 9 fixed to 0 is passed through one annular peripheral edge of the patch cloth 9 so that the undiluted solution hole 9a of the patch cloth 9 is the undiluted solution hole 7a of the seal plate 7.
When fitted to, the assembled state shown in FIG. 4, in other words, the state before tightening the filter plate is obtained. In this state, the seal plate 7 and the recess 2a of the filter plate 1 are not sealed at all, but rather have a gap. In this manner, the filter plate 1 is covered with the filter cloth 10 and the pair of filter cloths 10 and 10 is sandwiched between the adjacent filter plates 1 and 1, and the filter plate is attached to the main plate side by a movable plate of a known filter press. When tightened to, the state shown in FIG. 6 is obtained. In this state, the seal plate 7 is pressed against the inner surface of the recess 2a of the filter plate 1 through the patch cloth 9 by the filter plate clamping force, and the seal surface 6 of the seal plate 7 and the inner surface of the recess 2a of the filter plate 1 are in contact with each other. And the sealing surfaces 6 and 6 of the opposing seal plates 7 and 7 are almost completely sealed by the patch cloth 9. Further, by fitting the seal plate 7 into the recess 2a of the filter plate 1, the stock solution supply hole 5 formed by the seal plate 7 and the pad 9 and the stock solution hole 2b of the filter plate 1 are aligned with each other, and Flow from the undiluted solution hole 2b toward the undiluted solution supply hole 5 as shown by the arrow in FIG. Further, at this time, due to the supply pressure of the undiluted solution, the opposing annular peripheral portions of the patch cloth 9 are pushed into the undiluted solution passage 8 of the seal plate 7, and a gap 12 is formed between both annular rims. It is guided to the inside of the filter chamber 11 formed between the pair of filter cloths 10, 10 through 12 to perform a predetermined filtration. On the other hand, after completion of the filtration, the tightening is released and the filter cloth 10 is separated from the filter plates 1 and 1 as shown in FIG. 4, and the seal plate 7, the filter plate 1 and the seal plate 7 are separated. , 7 are released from each other. Then, the cake between the filter plates 1 and 1 is appropriately removed from the filter cloths 10 and 10 and returned to the standby position where filtration is possible again.

According to the above embodiment, each filter cloth 10 is hung and removed from each filter plate 1 as the filter plates 1, ..., 1 are tightened and unfastened, and thereby fixed to the filter cloth 10. The sealing plate 7 supported by the applied patch cloth 9 is fitted into the concave portion 2a of the filter plate 1 so that the filter plate 10 and the filter plate 1 are simultaneously tightened and released.
It is possible to perform the sealing action of the undiluted solution hole portion between and, and to release the sealing action. In addition, the cleaning of the filter cloth 10 is performed by the filter cloth 1
It can be easily performed even when 0 is applied to the filter plate 1. Further, since the seal plate 7 is fixed to the filter cloth 10 by the pad cloth 9, there is no room for the undiluted solution to enter between the pad cloth 9 and the filter cloth 10, and the seal plate 7 is not soiled and cleaned. There is no need. Also, since the patch cloth 9 is attached to the filter cloth 10 before the filter cloth 10 is used for filtration,
There is no inconvenience in hanging the filter plate 1 on and off. Further, since the seal plate 7 is also light, it does not easily come off from the patch cloth 9. In addition, the seal plate 7 is a substantially annular plate, and a protruding portion 7b that protrudes in the radial direction from a part of the peripheral edge of the stock solution hole 7a is formed. By making the shape substantially the same, the seal plate 7 does not rotate in the recess 2 of the filter plate 1 around the axis of the stock solution hole 7a, and the load on the filter cloth 10 and the like does not act. The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example, the shape of both the seal pad 9 and the seal plate 7 may be a round shape or a square shape according to the position of the frame 2 of the filter plate 1. Moreover, even if the stock solution supply hole 2a of the filter plate 1 is formed in a top feed type or a bottom feed type, the above invention can be applied.

[Brief description of drawings]

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

FIG. 2 is an enlarged front view of an essential part of the filter plate, to which a filter cloth of a filter press according to another embodiment of the present invention is applied.

FIG. 3 is an exploded view of essential parts of the filter cloth, the seal pad and the seal plate, taken along the line III-III in FIG.

FIG. 4 is a diagram showing a relationship between the filter cloth and the filter plate in the state before the filter plate is fastened in which the seal plate is assembled to the filter cloth in FIG.

FIG. 5 is an enlarged front view of a seal plate attached to the filter plate.

FIG. 6 is a cross-sectional view of a filter press equipped with the filter cloth in a filter plate tightened state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filter plate, 2 ... Frame, 2a ... Recessed part, 2b ... Through hole, 3 ... Filtration bed, 4 ... Filtrate discharge hole, 5 ... Stock solution hole, 6 ... Sealing surface, 7
... seal plate, 7a ... through hole, 7b ... protruding part, 8 ... undiluted solution passage, 9 ... sealing patch cloth, 10 ... filter cloth, 11 ... filter chamber, 1
2 ... Gap.

Claims (4)

[Claims] 1. A pair of filter cloths (10) which are sandwiched between adjacent filter plates (1, 1) and which face each other in a region corresponding to the filter bed (3) of the filter plate (1) when the filter plates are fastened. , 10) to form a filter chamber (11) between the filter chamber (11), which is formed in the frame (2a) of the filter plate (2) and has a filter plate stock solution hole (2b) in a part thereof. Is inserted into the recessed portion (2a) formed by penetrating when the filter plate is tightened, and the stock solution hole is formed at the center corresponding to the stock solution supply hole (2b) formed in the frame (2a) of the filter plate (1). (7a) penetrates and the undiluted solution hole (7a)
Concave a part of the peripheral edge (6) of the stock solution passageway (8) from the stock solution hole (7a) to the filter chamber (11) located on the filter bed (3) side of the filter plate (1). The formed seal plate (7) covers both the front and back peripheral edges (6) of the seal plate (7) and is spread to both sides through the undiluted solution hole (7a) of the seal plate (7), and the seal is formed. The portion of the plate (7) that spreads to the side of the undiluted solution is defined by the undiluted solution hole (10a) of the filter cloth (10).
While being joined to the peripheral edge of the filter plate, the part on the opposite side is connected to the filter plate
Can be superposed on the periphery of the undiluted solution hole (2b) of the frame (2) to seal between the seal plate (7) and the inner surface of the recess (2a) of the filter plate (1) when tightening the filter plate. A filter cloth for a filter press, comprising a sealing plate supporting sheet (9). 2. The sheet (9) comprises a filter cloth (10) and a stock solution hole (10a, 2) in the filter plate (1) when the filter plate is fastened.
When supplied to b) respectively, it is flexible enough that part of the sheet (9) and part of the filter cloth (10) enter the stock solution passageway (8) of the sealing plate (7) by the supply pressure of the stock solution. The filter cloth of the filter press according to claim 1, which is made of a material having properties. 3. The seal plate (7) is a substantially annular plate having the undiluted solution hole (7a) in the center thereof, and a projection projecting in the radial direction from a part of the peripheral edge of the undiluted solution hole (7a). Division (7
b) is formed, and the stock solution passageway (8) is formed in the protruding portion (7b).
3. The filter press filter cloth according to claim 1, wherein the filter plate (1) is formed so that the shape of the recess (2a) is substantially the same as the shape of the seal plate (7). 4. The filter plate (1) comprising the filter cloth according to claim 1.
A filter press provided with a movable plate which is disposed between the filter plate (1) and the stock solution supply hole (2b) of the filter cloth (10) and the stock solution hole (10a) of the filter cloth (10) are aligned with each other to tighten the filter plate. .