JPH0549323B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a compressed filter press in which compressed filter plates having compressed membranes and ordinary filter plates without compressed membranes are arranged alternately.

BACKGROUND ART Conventionally, this type of compression filter press has various structures. For example, a large number of compressed filter plates each having a compressed membrane on one surface may be arranged, a pair of filter cloths may be arranged between adjacent compressed filter plates, and a stock solution supply port may be provided on the other side of the frame of the compressed filter plates. A hole communicating with the opening is opened in the filter cloth on the other side of the compressed filter plate, while a stock solution supply recess is formed in the lower part of the frame of the compressed membrane, and the lower part of the compressed membrane is The holes in the filter cloth are pressed against the stock solution supply port of the squeeze filter plate at the peripheral portions to be removed, and the stock solution is supplied between the pair of filter cloths from the stock solution supply port of the filter plate through the holes in one of the filter cloths. There are things that have been done (Tokuko Akira)
59-30446).

Problems to be Solved by the Invention However, with the structure described above, since a recess is formed at the bottom of the squeeze membrane, it is difficult to bring the bottom of the hole in the filter cloth into close contact with the stock solution supply port of the filter plate. There was a problem that the stock solution entered between the one of the filter cloths and the filter plate and flowed into the filtrate side. Furthermore, since the recesses are formed in the compressed membrane, there is a problem that the strength of the compressed membrane is reduced and its lifespan is shortened.

Therefore, an object of the present invention is to solve the above-mentioned problems by effectively preventing the leakage of the stock solution between the filter cloth and the filter plate, and also by extending the life of the squeeze membrane. The purpose of the present invention is to provide a compressing type filter press that can perform the following tasks.

Means for Solving the Problems In order to achieve the above object, the present invention does not form a stock solution supply port in the filtration bed, which is the expanding part of the compressed filter plate, but supplies the stock solution only to the filter bed of the ordinary filter plate. In addition to forming a supply port, a stock solution guide member is arranged between a pair of filter cloths between a compressed filter plate and an ordinary filter plate, and the stock solution is passed from the stock solution supply port through the stock solution guide member between the pair of filter cloths. It was configured so that the filter chamber was supplied with the filter chamber. That is, compressed filter plates having a filter bed, a frame, and a compressed membrane covering the filter bed, and ordinary filter plates having a filter bed and a frame are arranged alternately, and a pair of filter plates are arranged between the two filter plates. In a compression type filter press in which a filter cloth is arranged to form a filter chamber between both filter cloths, and a stock solution is supplied into the filter chamber to perform compression filtration, the ordinary filter plate has a structure in which the above-mentioned ordinary filter plate is attached to the frame part. A undiluted solution supply path and a undiluted solution supply port communicating with the undiluted solution supply path and opening toward the compressed filter plate are formed, and one of the pair of filter cloths between the compressed filter plate and the ordinary filter plate. The filter cloth on the ordinary filter plate side is formed with a through hole that communicates with the stock solution supply port, while the filter cloth on one of the pair of filter cloths is formed between the compressed filter plate and the ordinary filter plate. A stock solution guide member is provided so as to be supported by a cloth, and the stock solution guide member connects the stock solution supply port of the ordinary filter plate and the through hole of the filter cloth to the filter chamber formed between the pair of filter cloths. The compressed filter plate has a raw solution outflow path that communicates with the raw solution, and the compressed filter plate forms a raw solution supply hole penetrating the frame portion of the core plate,
The stock solution supply path of the ordinary filter plate includes a stock solution supply hole that passes through the frame and communicates with the stock solution supply hole of the compressed filter plate, and the stock solution supply hole and the stock solution supply port of the normal filter plate. and a stock solution supply hole communicating with each other.

Further, in the above configuration, the stock solution guiding member is attached to either the compressed filter plate or the filter cloth on the compressed filter plate side of the pair of filter cloths through the filter cloth when the filter plate is tightened. It can also be configured to include an abutting plate that abuts.

Effects of the Invention According to the above configuration, when the filter plate is tightened, the portion of the concentrate guide member on the squeeze filter plate side comes into contact with the press filter plate or the contact plate via the filter cloth on the press filter plate side. As a result, the opposing portion of the concentrate guide member is pressed against the surrounding area of the concentrate supply port of the ordinary filter plate through the filter cloth, thereby sealing the surrounding member of the concentrate supply port. Therefore, it is possible to effectively prevent the stock solution from entering between the filter plate and the filter cloth. In addition, in the above-mentioned compressed filter plate, there is no need to form a stock solution supply port in the filter bed, which is the part where the compressed membrane expands, and there is no need to align the stock solution supply port between the core plate of the compressed filter plate and the compressed membrane. This makes it easier to manufacture compressed filter plates. Furthermore, when the compressed membrane is expanded, since there is no stock solution supply port in the filtration bed, there is no possibility of damage around the stock solution supply port. In other words, in conventional systems in which a stock solution supply port was formed in the filtration bed of a compressed membrane, when the filter bed of the compressed membrane was expanded, the squeeze membrane closed the filtration chamber against the sealing pressure in the area surrounding the stock solution supply port. It had a tendency to expand abnormally to the side and break easily in the surrounding area. However, in the present invention, since there is no stock solution supply port in the filtration bed of the compressed membrane, damage to the compressed membrane as in the conventional method can be reliably prevented. Therefore, the compressed membrane does not easily lose its shape and has a long life. Further, in the ordinary filter plate, the stock solution supply port and the stock solution supply hole do not need to send the stock solution to other filter plates, so the sizes of the through holes of the filter cloth and the stock solution guide member themselves can be made small. can. Therefore, the portion that restricts the expansion of the compressed membrane can be made smaller, the expansion of the compressed membrane can be performed more smoothly, the filtration area of the filter cloth can be increased, and the cleaning of the filter cloth can be made easier. It becomes easier. In addition, since only the ordinary filter plate mentioned above has a stock solution supply port,
Out of a pair of filter cloths, only the filter cloth on the normal filter plate side needs to be formed with a through hole, and the processing of the filter cloth also requires that the liquid guide member is not provided as a part of the filter plate, but is separate from the filter plate. In addition, since the undiluted solution guide member is supported on the filter cloth, the complicated work of attaching the undiluted solution guide member to the filter plate is not required. Further, a stock solution supply hole communicating with the stock solution supply hole and a stock solution supply port communicating with the stock solution supply hole are formed in a normal filter plate, and the stock solution is guided from the stock solution supply hole through the stock solution supply hole and through the stock solution supply port. Since the material is supplied into the filter chamber between the pair of filter cloths, the stock solution supply pressure normally acts directly on the filter plate and does not directly act on the stock solution guide member, so the stock solution supply pressure Damage to the liquid guide member due to pressure is significantly reduced. In addition, there is no undiluted solution guide member in the frame portion that comes into contact with the directly adjacent filter plate when the filter plate is tightened, and the undiluted solution guide member is arranged at a position facing the filtration bed of the compressed membrane of the compressed filter plate. It does not require very high rigidity, and there is little chance of damage due to tightening of the filter plate.

Examples Examples according to the present invention will be described in detail below with reference to FIGS. 1 to 17.

As shown in FIG. 1, the compressed filter press according to this embodiment includes a core plate 1 having a filter bed 1a and a frame portion 1b, and compressed membranes 7, 7 that cover the filter bed 1a of the core plate 1. and a filter bed 2.
A and ordinary filter plates 2 having frame portions 2b are arranged alternately, and a pair of filter cloths 3, 3 are arranged between the filter plates 8, 2 to form a filter chamber between the filter cloths 3, 3. 15, and the frame portion 2b of the ordinary filter plate 2 is formed with a stock solution supply path and a stock solution supply port 2i that communicates with the stock solution supply path and opens toward the compressed filter plate side. Pressed filter plate 8 and the above ordinary filter plate 2
Of the pair of filter cloths 3, 3 between the filter cloths 3, the filter cloth 3 on the ordinary filter plate side is formed with a through hole 3b communicating with the stock solution supply port 2i,
and the ordinary filter plate 2, and the concentrate guide member 4 connects the concentrate supply port 2i of the ordinary filter plate 2 and the through hole 3b of the filter cloth 3 to the pair of filter cloths. The filter chamber 15 formed between 3 and 3
The stock solution has a stock solution outflow path that communicates with the stock solution supply holes 1d, 7d, and 7d of the compressed filter plate 8, the stock solution supply path and the stock solution supply port 2i of the ordinary filter plate 2, and
The undiluted solution is supplied through the undiluted solution outflow path of the undiluted solution guide member 4 into the filter chamber 15 between the pair of filter cloths 3, 3, where compression filtration is performed.

As shown in FIGS. 2 to 7, the compressed filter plate 8 has the following features:
It consists of a core plate 1 and the compressed membranes 7, 7 covering both the front and back surfaces of the core plate 1. The core plate 1 is formed by integrally forming a filter bed 1a and a frame part 1b, and has a curved part 1c protruding from the upper center of the frame part, and the stock solution supply hole 1d is formed in the curved part 1c. do. Both the front and back surfaces of this core plate 1 are coated with the compressed membranes 7, 7, respectively, and bolts 9, . . . , 9, 1 are provided at both upper and lower ends.
0, . . . , 10 to fix it to the core plate 1. Therefore, corresponding to the filtration bed 1a, the frame part 1b, the curved part 1c, and the stock solution supply hole 1d of the core plate 1, each pressing membrane 7 also has the filtration bed 7a, the frame part 7b, the curved part 7c,
In addition, a stock solution supply hole 7d is formed. Above core plate 1
Ear portions 1e, . Holes 1f, 1f, 1f used for supply and penetrated by the other three ears 1e, 1e, 1e
is used for filtrate recovery. Therefore, filtrate collection holes 1 are provided at the upper right and lower left of each of the compressed membranes 7, respectively.
Filtrate recovery openings 7g, 7g communicating with f, 1f via communication holes (not shown) are formed. Furthermore, a substantially square thick walled portion 7e is formed in the vicinity of the frame at the upper center of the filter bed 7a of each compressed membrane 7.
A recess 7f is formed in this thick portion 7e, and a rigid contact plate 5 is fitted into and fixed to this recess 7f.

As shown in FIGS. 8 to 13, the ordinary filter plate 2 is formed by integrally forming a filter bed 2a and a frame part 2b, and has a curved part 2c protruding from the upper center of the frame part. A stock solution supply hole 2d that communicates with the stock solution supply holes 1d, 7d, and 7d of the compressed filter plate 8 is formed in the curved portion 2c. Ear portions 2e, ..., 2e protrude from the upper and lower sides of each side of the ordinary filter plate 2, and the eighth
In the figure, only the hole 2g penetrated by the upper left ear 2e is used for supplying compressed air to inflate the compressed membrane, and the other three holes 2f, 2f, 2f penetrated by the ears 2e, 2e, 2e. are used for filtrate recovery, and the holes 1 in each ear portion 1e of the compressed filter plate 8 are respectively
g, 1f, 1f, 1f. Furthermore, filtrate recovery openings 2l, 2l are formed at the upper right and lower right of the filter bed 2a of the ordinary filter plate 2, respectively, to communicate with the filtrate recovery holes 2f, 2f via communicating holes 2j, 2j. Further, in the vicinity of the frame of the upper central part of the filter bed 2a of the ordinary filter plate 2, a pair of holes are provided on both the front and back sides of the portions of the adjacent compressed filter plates 8 that respectively face the thick walled portions 7e of the compressed membranes 7. A T-shaped stock solution supply hole 2k that opens the stock solution supply ports 2i, 2i and communicates the stock solution supply ports 2i, 2i with the stock solution supply hole 2d.
The stock solution supply hole 2d and the stock solution supply hole 2k constitute the stock solution supply path.

Also, among the pair of filter cloths 3, 3 between the compressed filter plate 8 and the ordinary filter plate 2, the filter cloth 3 on the ordinary filter plate side
A through hole 3b communicating with the stock solution supply port 2i of the stock solution supply hole 2k of the ordinary filter plate 2 is formed in the filter plate 2. There is no need to form through holes in the other filter cloth 3. Further, in the upper portions of the pair of filter cloths 3, 3, penetrating holes 3a, 3a are formed which communicate with the stock solution supply holes 1d, 7d, 7d, 2d of each of the filter plates 8, 2.

On the other hand, the stock solution guiding member 4 is shown in FIGS.
As shown in Figures 4 to 17, it is suspended and supported by the filter cloth 3 on the normal filter plate side, and when the filter plates 8 and 2 are tightened, it is applied to the abutment plate 5 through the filter cloth 3 on the compressed filter plate side. They are starting to touch each other. The stock solution guiding member 4 has a U-shaped protrusion 4a formed on the surface of the plate-like main body 4e, and the above-mentioned ordinary filter plate 2 in the center of the main body 4e.
A through hole 4b communicating with one of the stock solution supply ports 2i of the stock solution supply holes 2k is formed. As a result of this configuration, a recess 4c is formed below the U-shaped protrusion 4a and below the through hole 4b. In addition, 4
d is a bolt 6 that attaches the stock solution guide member 4 to the filter cloth 3;
It is a screw hole. Therefore, the stock solution flowing through the stock solution supply port 2i of the normal filter plate 2 and the through hole 3b of the filter cloth 3 flows through the stock solution outflow portion, that is, the outflow path leading from the through hole 4b of the main body 4e to the recess 4c. , and begins to flow downward. This stock solution guide member 4 is provided with a through hole 4b of the stock solution guide member 4 in the filter cloth 3 on the normal filter plate side of the pair of filter cloths 3, 3 between the compressed filter plate 8 and the normal filter plate 2. bolts 6, so that they communicate with the through holes 3b of the filter cloth 3.
..., 6, and is suspended and supported.

According to the above configuration, each of the plurality of compressed filter plates 8
Then, the ordinary filter plates 2 are respectively tightened, and a pair of filter cloths 3, 3 are sandwiched between the two adjacent filter plates 8, 2.
At this time, the stock solution guide member 4 has its through hole 4
b and the through hole 3b of the filter cloth 3 communicate with the stock solution supply port 2i of the normal filter plate 2, and the end surface of the stock solution guide member 4 on the squeeze filter plate side comes into contact with the filter cloth 3 on the squeeze filter plate side. This contacts the plate 5, and as a result, the part around the through hole 4b of the stock solution guide member 4 is pressed against the part around the stock solution supply port 2i of the normal filter plate 2 via the filter cloth 3, and both parts are brought into close contact. . And each filter cloth 3
The stock solution is supplied into each stock solution supply hole 1d, 7d, 7d, 2d of the compressed filter plate 8 and the normal filter plate 2 through the hole 3a. Then, the stock solution flows from the stock solution supply hole 2d and stock solution supply hole 2k of the normal filter plate 2 to the stock solution supply port 2i, and through the through hole 3b of the filter cloth 3, and from the through hole 4b of the stock solution guide member 4 to the recess. 4
c, it is supplied into the filter chamber 15 between the pair of filter cloths 3, 3 between the adjacent filter plates 8, 2, and filtration is performed. Then, at a desired time, the squeeze membrane 7 is expanded to squeeze the cake in the filter chamber 15, and after the filtration is completed,
The filter plates 8, 2 are opened and the cake inside the pair of filter cloths 3, 3 is discharged.

According to the above embodiment, when the filter plate is tightened, the end surface of the concentrate guide member 4 on the compressed filter plate side comes into contact with the contact plate 5 via the filter cloth 3 on the compressed filter plate side, and thereby, conversely,
The area around the through hole 4b of the undiluted solution guide member 4 is pressed against the area around the undiluted solution supply port 2i of the ordinary filter plate 2 through the filter cloth 3, and the area around the undiluted solution supply port 2i is pressed tightly.
Since the surrounding members can be sealed, it is possible to effectively prevent the undiluted solution from entering between the filter plate 2 and the filter cloth 3. In addition, in the compressed filter plate 8, there is no need to form a stock solution supply port in the compressed membrane 7 and the filter beds 7a, 1a of the core plate 1, and there is no need to form a stock solution supply port in the core plate 1 of the compressed filter plate 8 and the filter beds 7a, 1a of the compressed membrane 7. There is no need to align the hole with the stock solution supply port, making it easier to mold the compressed membrane 7 and manufacture the core plate 1. Moreover, when the compressed membrane 7 is expanded, since there is no stock solution supply port in the filter bed 7a, there is no possibility of damage around the stock solution supply port. In other words, in conventional systems in which a stock solution supply port was formed in the filtration bed of a compressed membrane, when the filter bed of the compressed membrane was expanded, the squeeze membrane closed the filtration chamber against the sealing pressure in the area surrounding the stock solution supply port. It had a tendency to expand abnormally to the side and break easily in the surrounding area. However, in this embodiment, since there is no stock solution supply port in the filtration bed 7a of the compressed membrane 7, damage to the compressed membrane 7 as in the conventional case can be reliably prevented. Therefore, the compressed membrane 7 does not lose its shape easily and has a long lifespan. In addition, in the ordinary filter plate 2, the stock solution supply port 2i and the stock solution supply hole 2k do not need to send the stock solution to other filter plates, so the stock solution supply port 2i and the stock solution supply hole 2k are
The inner diameter can be made smaller than d, and the through hole 3b of the filter cloth 3, the through hole 4b and recess 4c of the undiluted solution guide member 4, and therefore the undiluted solution guide member itself can also be made smaller. Therefore, the portion that restricts the expansion of the compression membrane 7 can be made smaller, and the expansion of the compression membrane 7 can be performed more smoothly. Furthermore, if the stock solution guide member 4 is made smaller, the filtration area of the filter cloth 3 can be increased.
Cleaning of the filter cloth 3 also becomes easier. In addition, since only the ordinary filter plate 2 has the stock solution supply port 2i, it is only necessary to form the through holes 3b in the filter cloth 3 on the ordinary filter plate side among the pair of filter cloths 3, 3, making it easy to process the filter cloth 3. become.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various other embodiments. For example, the stock solution guide member 4 may be suspended and supported not by one filter cloth 3 but by the pair of filter cloths 3, 3. In addition, as the above-mentioned stock solution guide member,
A through hole is formed in the plate material, a passage is formed inside the plate material to communicate with the lower filter chamber, and this passage functions as a substitute for the above-mentioned recess.
A letter-shaped stock solution outflow path may be formed, or in this modification, no openings may be formed on the squeeze filter plate side, and a roughly L-shaped stock solution outflow path may be formed. Moreover, this stock solution guide member 4 is not composed of one plate material, but one plate material for each of the filter cloths 3.
The through hole 4b is formed in the guide plate of the filter cloth 3 on the normal filter plate side, and a gap maintaining member is provided between both guide plates to form the raw solution outflow path. The same effect as above may be achieved by doing so. Further, the abutment plate 5 may be supported on either the front or back surface of the filter cloth 3 on the press filter plate side, instead of being fixed to the press filter plate 8.
Alternatively, the abutment plate 5 may not be provided, and the thick portion 7e of the compressed membrane 7 may be provided with sufficient rigidity to exhibit the same function as the abutment plate 5. In addition, in each ordinary filter plate 2, its stock solution supply hole 2
Not limited to the one that supplies the stock solution to the stock solution supply hole 2k from d, the stock solution supply holes 1d, 7d, 7d, 2d of the filter plates 8, 2 are eliminated, and the stock solution is supplied from the side of each ordinary filter plate 2. The stock solution may be supplied to the stock solution supply hole 2k.

[Brief explanation of the drawing]

FIG. 1 is an enlarged side view of the main part of a squeeze filter press according to an embodiment of the present invention, and FIGS. 2 to 4 are a front view, a sectional side view, and an enlarged front view of the main part of the squeeze filter plate of the filter press, respectively. , Figures 5 to 7 are respectively 4th
Figure - line sectional view, - line sectional view and -
A line sectional view, Figures 8 to 10 are a front view, a sectional side view, and an enlarged front view of important parts of the ordinary filter plate of the filter press, and Figures 11 to 13 are XI-XI of Figure 10, respectively.
The line sectional view, the XII-XII line sectional view, the - line sectional view, and FIGS. 14 to 17 are a front view, a bottom view, a sectional side view, and a rear view, respectively, of the concentrate guide member of the filter press. 1... core plate, 1a, 2a, 7a... filter bed, 1
b, 2b, 7b...frame, 1c, 2c, 7c...
Curved part, 1d, 2d, 7d... Stock solution supply hole, 1
e, 2e... ears, 1f, 1g, 2f, 2g...
Hole, 2... Ordinary filter plate, 2k... Stock solution supply hole, 2i
...Standard solution supply port, 2j...Communication hole, 2l...Opening, 3...Filter cloth, 3a...Hole, 3b...Through hole,
4...Stock solution guide member, 4a...Protrusion, 4b...
Through hole, 4c... recess, 5... contact plate, 6, 9,
DESCRIPTION OF SYMBOLS 10... Bolt, 7... Pressed membrane, 7e... Thick wall part, 8... Pressed filter plate, 15... Filter chamber.

Claims (1)

[Scope of Claims] 1. A compressed filter plate 8 having a core plate having a filter bed 1a and a frame portion 1b, and a compressed membrane 7 covering the filter bed 1a of the core plate, and a filter bed 2a and a frame portion 2b. A pair of filter cloths 3 are arranged between the filter plates 8 and 2, and a filter chamber 15 is formed between the filter cloths 3.
In the compression type filter press which is configured to form a filtration chamber 15 and perform compression filtration by supplying a stock solution into the filter chamber 15, the ordinary filter plate 2 has a stock solution supply path 2k and a stock solution supply path 2k in the frame portion 2b. A stock solution supply port 2i communicating with the passage 2k and opening toward the compressed filter plate side is formed, and the ordinary filter of the pair of filter cloths 3 between the compressed filter plate 8 and the ordinary filter plate 2 is formed. A through hole 3b communicating with the stock solution supply port 2i is formed in the filter cloth 3 on the plate side, and one of the pair of filter cloths 3 is formed between the compressed filter plate 8 and the ordinary filter plate 2. One filter cloth 3
A concentrate guide member 4 is provided so as to be supported by the
The stock solution guide member 4 has a stock solution outflow path 4b that communicates the stock solution supply port 2i of the ordinary filter plate 2 and the through hole 3b of the filter cloth 3 with the filter chamber 15 formed between the pair of filter cloths 3. , 4c, and the compressed filter plate 8 forms a stock solution supply hole 1d penetrating the frame portion 1b of the core plate, while the stock solution supply passages 2d and 2k of the ordinary filter plate 2 are formed in the frame portion 1b of the core plate. A stock solution supply hole 2d that passes through the portion 2b and communicates with the stock solution supply hole 1d of the compressed filter plate 8, and a stock solution supply hole that communicates the stock solution supply hole 2d with the stock solution supply port 2i of the ordinary filter plate 2. 2k. 2 The compressed filter plate 8 or the pair of filter cloths 3
On any of the filter cloths 3 on the compressed filter plate side,
2. The compressing type filter press according to claim 1, wherein said raw solution guide member 4 is provided with an abutment plate 5 which comes into contact with said filter cloth 3 when said filter plate is tightened.