JPH0810356Y2 - Squeeze filter plate in squeeze filter press - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze filter plate in a squeeze filter press having a squeeze on the filtration surface of a squeeze membrane.

[0002]

2. Description of the Related Art A convex step portion is formed on the inner periphery of a through hole penetrating a filtration bed of a core plate, and an engaging step which is fitted into the convex step portion at one end of a small piece for forming a protrusion of a compression filter plate. Form a part and fit both steps, project the other end of the small piece onto the core plate to form a protrusion of the core plate, and exceed the height of the protrusion of the core plate on the filtration surface of the compression membrane. A squeeze filter plate is formed by forming a raised portion of height and opening a through hole penetrating from the top surface to the back surface of the raised portion, fitting the through hole into the protrusion of the core plate, and stacking a compressed film on the core plate. It is known that a filter is formed with a protrusion.

[0003]

However, when the protrusions provided on the pressing and filtering plate are subjected to the tightening pressure or the filtering and pressing pressure of the filtering plate through the adjacent filtering plate, these pressures are directly applied to the core plate. In order to counteract this, it is necessary to increase the thickness of the core plate more than necessary to enhance the strength of the filter plate or to arrange a large number of protrusions. When the number of the protrusions increases, the filtration area decreases accordingly, and when the thickness of the core plate increases, the weight of the squeezing filter plate increases. DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems in the above-described conventional squeezing filter plate having a protrusion, and an object of the present invention is to provide a squeezing filter press plate that can safely apply a squeezing pressure. .

[0004]

According to the present invention, in the squeezing filtration in a squeezing type filter press having a squeezing membrane laminated on a core plate and having a protrusion on a filtering surface, a through hole 9 penetrating the squeezing membrane 3 is formed. A tubular portion 10 formed on the peripheral edge of the back surface of the film,
Through holes 11 in the core plate 2 into which the tubular portions 10 of the squeeze film 3 on both sides of the core plate 2 are inserted, and by inserting the tubular portion 10 into the tubular portion 10 and pressingly fixing the tubular portion 10 in the through holes 11 in the core plate 2. Further, when the filter plate is fastened, a protrusion 4 is provided, which includes a column body 12 that is abutted with an adjacent filter plate together with the squeeze film surface side peripheral edge 14 of the tubular portion 10. Moreover, you may provide the notch pocket 20 notched in the thickness in the outer periphery of the cylinder part 10 of the said compressed film 3. In addition, the protrusion 4 of the compression filtration plate 1
May be made to project from the filtration surface 8 of the squeeze membrane 3 to the inside of the filtration chamber 18.

[0005]

[Effects] The compressed fluid is supplied between the core plate 2 and the compressed film 3 of the compressed filter plate 1, and the compressed film 3 except for the protrusions 4 has a filter cloth 7
The slurry that has been expanded through and is supplied into the filtration chamber 18 is squeezed and dehydrated. The squeeze film surface side peripheral edge 14 of the tubular portion 10 of the squeeze film 3 is compressed into substantially the same plane as the column 12 and the core plate 2
The tubular portion 10 in the through hole 11 is compressed between the through hole 11 and the column 12. Since the core plate 2 receives the above-mentioned compression pressure via the tubular portion 10, no shocking pressure is applied to the core plate 2. Therefore, it is possible to safely apply the filtration compression pressure to the compression filtration plate 1 in the filtration compression step. The space between the squeezing filter plate 1 and the adjacent filter plate 5 is maintained at a predetermined interval by the column 12 as a whole, and cakes having the same water content are obtained in the respective filter chambers 18. Therefore, the core plate 2 is not cracked by the above pressure. In addition, the compressed fluid is the core plate 2
Even if the compressed fluid enters between the through hole 11 and the tubular portion 10, the compressed fluid is received by the cut pocket 20 of the tubular portion 10 and does not flow out to the outside.

[0006]

The present invention will be described with reference to the drawings. FIG. 1 is a front view of a press filter plate 1 showing an embodiment of the present invention. Code 2
Is a core plate, 3 is a compressed film, and 4 is a protrusion formed on the filtration surface of the compressed film. FIG. 2 shows a positional relationship between the protrusions 4 and the ordinary filtration plate 5 adjacent to the protrusions 4 in a cross section taken along the line AA of FIG. Opposed to the protrusion 4 of the squeezing filter plate 1, the protrusion 6 of the ordinary filter plate is provided on the filtration surface of the ordinary filter plate 5. A filter cloth 7 is hung on each of the squeezing filter plate 1 and the normal filter plate 5, and an upper end of the filter cloth 7 is connected to a hanging device for the filter cloth 7 (not shown).

FIG. 3 illustrates the protrusion 4 of the squeezing filter plate 1 in detail. In the squeezing film 3, a cylindrical portion 10 is formed on the peripheral edge on the back surface side of a through hole 9 penetrating the filtering surface 8. ing.
In addition, both tube portions 10 of the squeeze film 3 that are superposed on both sides of the core plate 2
Are fitted into the through hole 11 penetrating the core plate 2 from both sides, and their tips are abutted to each other.

Reference numeral 12 is a column, which is driven so as to press and fix the tubular portion 10 of the compressed film 3 to the inner wall of the through hole 11 of the core plate 2. Further, the top surfaces 13 at both ends of the column 12 are located near the surface of the through hole 9 of the squeeze membrane 3, and when the filter board is tightened, the squeeze membrane surface side peripheral edge 14 surface of the tubular portion 10 and the adjacent ordinary filter plate 5 are provided. It becomes substantially flush with the protrusion 6 of the above. In addition, the cylinder part 1
0 is compressed between the through hole 11 of the core plate 2 and the outer periphery of the column 12. In addition, the protrusion 4 including the cylindrical portion 10 and the column 12
May be projected from the filtration surface 8 into the filtration chamber 18 or may be raised to the height of the frame portion of the compression filtration plate 1. Further, it is preferable that the size of the through hole 11 of the core plate 2 is approximately the same as the size of the protrusions of the adjacent filter plates that face each other.

In FIG. 3, the protrusion 6 of the ordinary filtration plate 5 is
It is composed of a protrusion 16 protruding from the filtration surface 15 of the ordinary filtration plate 5, and a chevron 17 fitted on the protrusion 16.
The height of the protrusion 16 is located almost in the middle of the filtration chamber 18 formed by the squeezing filter plate 1 and the ordinary filter plate 5 and at the height of the frame portion, and the chevron 17 is tightly fitted into the protrusion 16. Fix it. However, the protrusion 16 and the chevron 17 may be integrated and bolted to the filtration surface 15 of the ordinary filtration plate 5. If the thickness of the frame of the press filter plate 1 is substantially the same as the thickness of the filter bed, or if the height of the compression membrane surface side peripheral edge 14 of the tubular part is the same as the height of the frame part, the chevron 17 is projected. Part 1
There is no need to fit in 6.

In addition, the tubular portion 10 of the compressed film 3 has several cut pockets 20 that are cut in the wall thickness from the outer peripheral surface of the tubular portion. The notch pocket 20 allows the wall of the tubular portion 10 to escape when the tubular portion 10 normally abuts against the protrusion 6 of the filter plate 5 and is compressed, and is also press-fitted between the core plate 2 and the compressed film 3. Even if the compressed fluid enters the cylindrical portion 10, the compressed fluid is received and prevented from flowing out. When the compressed fluid enters the cut pocket 20, the cylindrical portion 10 and the pillar 12
The pressure contact between them increases.

The squeeze filter plates 1 and the ordinary filter plates 5 are alternately arranged and tightened by a tightening device for each filter plate (not shown), and the slurry is supplied into the filter chamber 18 through the slurry supply hole 34 and filtered. When the squeezing fluid is supplied between the core plate 2 and the squeezing membrane 3 through the passage 30 (FIG. 1) during the squeezing and squeezing, the squeezing membrane 3 moves inwardly of the filtration chamber 18 except for the protrusion 4 as shown by the wavy line. It expands and the slurry in the filtration chamber 18 is squeezed. Further, the filtrate is collected from the discharge hole 31 in the squeeze membrane 3 through the through hole 32 of the core plate 2 into the discharge passage 33 and discharged to the outside of the machine. In the above description, the normal filtration plate 5 adjacent to the compression filtration plate 1 is replaced with the compression filtration plate 1, and a plurality of compression filtration plates 1 can be arranged to perform filtration compression.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view of a protrusion portion of the compression filtration plate in FIG.

[Explanation of symbols]

1 ... Compressed filtration plate, 2 ... Core plate, 3 ... Compressed film, 4 ...
Protrusion, 9 through-hole of compressed film, 10 ··· Cylindrical part, 11 · · Through hole of core plate, 12 · · Pillar, 14 · · Edge of compressed film surface side of cylindrical part, 20 · · Notched pocket

Claims (3)

[Scope of utility model registration request] 1. A filtration chamber within a filtration chamber formed between a compression membrane and a filter plate adjacent thereto by expanding a compression membrane by superposing a compression membrane on the core plate and supplying a compression fluid between the core plate and the compression membrane. In a squeezing filter plate in a squeezing filter press in which the slurry is squeezed and dehydrated, a tubular portion 10 formed at the periphery of the membrane back surface side of a through hole 9 penetrating the filtration surface of the squeezing membrane 3,
Through-holes 11 in the core plate 2 into which the tubular portions 10 of the compressed film 3 stacked on both sides of the core plate 2 are inserted, and through-holes in the core plate 2 that are fitted into the tubular portion 10 to insert the tubular portion 10 into the through-holes. 1
1, a columnar body 12 is provided, which is fixedly pressed between the columnar body 1 and the columnar body 12 that is abutted against the adjacent filter plate together with the squeeze film surface side peripheral edge 14 of the tubular part 10 when the filter plate is tightened. Pressing filter plate in pressing type filter press. 2. The squeeze filter plate in a squeeze filter press according to claim 1, wherein a slicing pocket 20 is provided in the squeeze film 3 from the outer periphery of the cylindrical portion 10 so as to be cut in the wall thickness. 3. The compression type filter press according to claim 1 or 2, wherein the protrusions 4 of the compression filtration plate 1 are projected from the filtration surface 8 of the compression membrane 3 toward the inside of the filtration chamber. Filter plate.