JPH08917A - Press unit of filter press and press filter plate using the same - Google Patents

Abstract

PURPOSE:To provide a press unit of a filter press not damaging filtrate discharge properties even when pressing force becomes high and a press filter plate using the same. CONSTITUTION:A filtrate discharge guide member 10 having an opening 12a capable of communicating with the filtrate discharge opening 5f of an ordinary filter plate 5 without forming the filtrate discharge hole piercing through a press film 1, a passage 11a allowing the opening 12a to communicate with the filter bed 1b of the press film 1 and a bottom part 11g partitioning the passage 11a from the surface of the press film 1 is supported by filter cloth 3. The fitting recessed part 1f of the filtrate discharge guide member 10 for holding the filtrate discharge guide member 10 to a predetermined position with respect to the press film 1 is provided to the press film 1 or the adjacent filter plate 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeezing unit for a filter press and an squeezing unit of a filter press having an opening capable of facing a filtrate discharging opening of an adjacent filter plate and a passage for communicating the opening with a filtration bed of a squeezing membrane. The present invention relates to a press filter board using a unit.

[0002]

2. Description of the Related Art Conventionally, a squeezing membrane having a protective member that is removable and secures a passage for discharging a filtrate and a squeezing filter plate having the squeezing membrane are described in, for example, JP-A-5-103914. That is, a dovetail-shaped mounting recess provided in the frame of the compressed film is fitted with a corresponding dovetail-shaped protective member from the inside of the frame so that the outer peripheral surface of the protective member and the inner peripheral surface of the mounting recess are By elastically engaging, the squeeze membrane and the protection member are integrated by a dovetail joint.

[0003]

However, even if the protective member and the recess of the squeeze membrane are dovetail joints, if the squeezing pressure applied to the squeeze membrane becomes high, the protective member communicates with the filtrate discharge hole of the substrate. However, there is a possibility that the hole may be blocked by being displaced from the position covering the hole of the compressed film formed through the compressed film or by the surface of the protective member falling. Therefore, an object of the present invention is to solve the above problems, and to provide a squeezing unit and a squeezing filter plate having the squeezing unit that do not impair the filtrate discharge performance even when the squeezing pressure is high. .

[0004]

In order to achieve the above object, the present invention provides an opening which can communicate with the filtrate discharge opening of a normal filter plate without forming a filtrate discharge hole penetrating the squeeze membrane. And a passage communicating the opening with the filtration bed of the squeezing membrane,
A filtrate discharge guide member having a bottom for partitioning the passage from the surface of the squeeze membrane is supported on a filter cloth, and a filtrate discharge guide member for holding the filtrate discharge guide member at a predetermined position with respect to the squeeze membrane is fitted. It is configured to have a fitting recess in the squeeze membrane or the adjacent filter plate.

That is, the invention according to claim 1 is provided with a squeeze film which constitutes a squeeze filter plate of a squeeze filter press by covering a substrate having a frame, and a filtrate discharge guide member attached to the squeeze film. The membrane is arranged so as to face the frame formed so as to overlap the frame of the substrate, the filtration bed surrounded by the frame, and the filtrate discharge opening of the filter plate communicating with the filtrate holes of the adjacent filter plates. It is formed at a predetermined place on the frame,
While having a filtrate discharge guide member fitting recess into which a filtrate discharge guide member is fitted at the time of filtration, the filtrate discharge guide member is closely fitted to the recess of the squeeze film, and the frame of the squeeze film is Has a surface that is substantially flush with the surface of the filter plate, and on the surface, an opening that communicates with a filtrate hole of an adjacent filter plate and that can communicate with a filtrate discharge opening of the filter plate; It is configured to have a filtrate discharge passage that communicates with the filtration bed and a bottom portion that partitions the passage from the surface of the squeeze membrane. According to a second aspect of the present invention, in the first aspect of the present invention, the filtrate discharge guide member is supported by a filter cloth arranged so as to face the squeeze membrane. According to a third aspect of the present invention, in the second aspect, the filtrate discharge guide member is disposed on the back surface of the filter cloth, which is located on the compressed membrane side, and between the filtrate discharge passage and the passage and the surface of the compressed membrane. A back plate having a bottom part for partitioning, a front plate arranged on the surface of the filter cloth and having the opening, and a connecting member for connecting the back plate and the front plate to support the filter cloth. . Claim 4
According to a second aspect of the present invention, in the second aspect, the filtrate discharge guide member is disposed on the back surface of the filter cloth, which is located on the compressed film side, and a bottom portion which partitions the filtrate discharge passage from the passage and the surface of the compressed film. And a front plate disposed between the back plate and the back surface of the filter cloth and having the opening, and a connecting member for connecting the back plate and the front plate to support the filter cloth. To configure. According to a fifth aspect of the present invention, in the second aspect, the filtrate discharge guide member is disposed on the back surface of the filter cloth, which is located on the compressed membrane side, and between the filtrate discharge passage and the passage and the surface of the compressed membrane. It is configured to have a back plate having a bottom part for partitioning and the opening, and a connecting member for connecting the back plate and supporting it on the filter cloth. According to a sixth aspect of the present invention, in the first aspect, the squeeze film forms an engaging recess cut into the inner surface of the recess, and the filtrate discharge guide member engages with the engaging recess to squeeze the film. Is provided with an inclined engaging portion for fitting and supporting the filtrate discharge guide member. According to a seventh aspect of the present invention, in the invention of the sixth aspect, the filtrate discharge guide member is disposed on the back surface of the filter cloth located on the compressed membrane side, and the filtrate discharge passage, the passage, and the surface of the compressed membrane. It is configured to have a bottom portion for partitioning the space and the opening. The invention according to claim 8 is claim 1
In the invention of any one of 7 above, the filter bed of the above-mentioned compressed membrane is
The squeezing filter plate is composed of a frame body having a space surrounded by the frame of the substrate so as to face the space of the substrate. According to a ninth aspect of the invention, in any one of the first to eighth aspects of the invention, the adjacent filter plates include a frame body having a space surrounded by a frame, and the space of the frame body is the compressed film. The squeezing membrane is arranged so as to face the filtration bed. According to a tenth aspect of the present invention, there is provided a squeezing filter plate of a filter press in which the squeezing unit according to any one of the first to ninth aspects is covered on the substrate. According to an eleventh aspect of the present invention, in the invention of the tenth aspect, the substrate of the squeezing filter plate is composed of a frame body having a space surrounded by a substrate frame in a portion of the squeezing membrane facing the filtration bed. . Claim 1
The invention according to 2, comprises a squeeze film which constitutes a squeeze filter plate of a squeeze filter press by covering a substrate having a frame, and a filtrate discharge guide member attached to the squeeze film, wherein the squeeze film is a frame of the substrate. A frame formed so as to overlap
While having a filtration bed surrounded by the frame, the filtrate discharge guide member has an opening that communicates with a filtrate hole of an adjacent filter plate and that can communicate with a filtrate discharge opening of the filter plate, and the opening and the squeeze member. A filtrate discharge passage communicating with the filtration bed of the membrane and a bottom portion separating the passage and the surface of the squeezed membrane are provided, and the filtrate discharge guide member is provided at the time of filtration by adjoining the filter. The plate is configured to be fitted into the filtrate discharge guide member fitting recess having the filtrate discharge opening. According to a thirteenth aspect of the present invention, in the invention of the twelfth aspect, the filtration bed of the squeezing membrane is opposed to the space of the substrate of the squeezing filter plate constituted by a frame body having a space surrounded by the substrate frame. It is configured to be arranged.
According to a fourteenth aspect of the present invention, in the twelfth or thirteenth aspect of the present invention, the adjoining filter plates are composed of a frame body having a space surrounded by a frame, and the space of the frame body is the filtration bed of the compressed membrane. The squeeze membrane is arranged so as to face the above.

[0006]

According to the structure of the present invention, an opening which can communicate with the filtrate discharge opening of the ordinary filter plate without forming a hole for discharging the filtrate penetrating the compressed membrane and the filtration of the opening and the compressed membrane. A filtrate discharge guide member having a passage communicating with the floor is supported on a filter cloth, and a fitting recess for fitting the filtrate discharge guide member to a squeeze film or an adjacent filter plate is formed on the squeeze film or the adjacent filter plate. Configure to have. Therefore, since the filtrate discharge passage is not formed in the compressed membrane, the filtrate discharge passage is not deformed even if the compressed membrane expands and contracts, and the filtrate discharge passage can be reliably secured in the compressed membrane. Further, since the filtrate discharge passage for discharging the filtrate of the compressed film does not directly contact the surface of the compressed film, and is separated from the surface of the compressed film by the bottom portion of the filtrate discharge guide member, the compressed film expands. However, the filtrate discharge passage can be effectively prevented from being deformed, and the filtrate discharge passage can be secured more reliably. As a result, the squeeze film can be made of a material that is not easily broken, is thin, and is easily deformed without giving any consideration to securing the filtrate discharge passage.

Further, the filtrate discharge guide member supported by the filter cloth and fitted in the squeezing membrane or the recess of the adjacent filter plate is a filter plate arranged adjacent to the squeezing filter plate, for example, a filtrate hole of a normal filter plate. Since there is an opening that communicates with the filtrate discharge opening that communicates with, and a filtrate discharge passage that connects the opening and the filtration bed of the compressed membrane, the filtrate of the filtration bed of the compressed membrane has an opening from the filtrate discharge passage. Then, it enters into the opening of the adjacent ordinary filter plate through the filter cloth and is discharged to the filtrate hole. Therefore, the opening of the filtrate discharge guide member is only flatly pressed in the thickness direction of the filter plate by the frame of the adjacent ordinary filter plate, and is less likely to be deformed otherwise. Therefore, even if the squeezing pressure is increased, the opening for discharging the filtrate of the squeeze membrane is not blocked, and the dischargeability of the filtrate is not impaired. Further, in the past, the squeeze film was sometimes deformed and damaged at the hole portion penetrating the squeeze film, but since it is not necessary to form a hole part penetrating the squeeze film itself, such a problem Can be effectively prevented. Further, it is not necessary to form the through hole in the substrate, and the processing becomes easier.
Further, since it is not necessary to form the opening and the passage in the compressed film itself, and the compressed film only needs to form the concave portion, the processing of the compressed film becomes simple.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to FIGS.
4 will be described in detail. The pressing unit 50 according to the first embodiment of the present invention comprises a pressing membrane 1, a filter cloth 3, and a filtrate discharge guide member 10 supported by the filter cloth 3. The squeeze membrane 1 of the squeeze unit 50 is attached to the substrate 2 to form the squeeze filter plate 6, and the ordinary filter plates 5 and the squeeze filter plates 6 are alternately arranged to form a squeeze filter press. ing. As shown in FIGS. 2 and 3, the compressed film 1 includes a frame 1a, a filtration bed 1b, and a filtrate discharge guide member fitting recess 1f. Frame 1a above
Is formed in a rectangular frame shape so as to overlap the frame 2a of the substrate 2. The filtration bed 1b is formed to be recessed in the thickness direction from the surface of the frame 1a, and on the surface thereof, although not specifically shown, projections for forming a large number of filtrate discharge grooves are formed. In some cases, the filter bed 1b may be formed only by forming the filtrate discharge groove without recessing the filter bed 1b with respect to the frame 1a. A stock solution supply port 1d penetrating in a substantially circular shape is formed at the center of the filter bed 1b. A stock solution supply fitting (not shown) supported by a well-known filter cloth 3 is tightly connected to the stock solution supply port 1d when the filter plate is tightened, and the stock solution supply port 1d is provided in the filter chamber 9 between the pair of filter cloths 3 and 3. It is configured to supply a stock solution. As shown in FIGS. 2 to 4, the recessed portion 1f is formed by connecting the compressed film 1 to the substrate 2
When the filter press is formed by covering the frame 1a, it is formed at the lower end portion of each side portion of the frame 1a so as to face the filtrate discharge opening 5f of the adjacent ordinary filter plate 5 through the filter cloth 3. The recess 1f has a substantially rectangular shape and is formed slightly lower than the filter bed 1b, as is clear from FIG. The recess 1f is clear from FIG. 2 so that the filtrate discharge guide member 10 having a substantially rectangular plate shape can be fitted therein, and the filtrate flowing through the filtration bed 1b of the squeeze membrane 1 can easily enter the filtrate discharge guide member 10. It is formed so as to extend further below the lower end of the filtration bed 1b. The filtrate discharge guide member 10 supported by the filter cloth 3 is, as shown in FIGS.
And a squeeze membrane 1 and a substantially rectangular back plate 11 fitted in the recess 1f of the squeeze film 1, and the back plate 11 is disposed on the opposite surface side with the filter cloth 3 interposed therebetween. The front plate 12 having a substantially rectangular shape and the back plate 11 and the front plate 12 are connected to each other to form the two plates 1.
A pair of mounting screws 13 and 13 for fixing 1 and 12 to the filter cloth 3.
It has and. On the surface of the back plate 11 on the filter cloth side, the compressed film 1
On the filter cloth side of the plate-shaped bottom portion 11g that comes into direct contact with the surface of the intermediate column 11b, an intermediate column 11b for resisting the pressing force of the ordinary filter plate 5 is arranged, and a U-shaped groove is provided so as to sandwich the intermediate column 11b. 11a is formed. Therefore, since the groove 11a is not in direct contact with the compressed film 1, the groove 11a is not closed even if the compressed film 1 expands. Also, the front plate 1
A filtrate discharge opening 12a, which is connected to the filtrate discharge through hole 3a of the filter cloth 3 and can be communicated with the filtrate discharge opening 5f of the ordinary filter plate 5, is formed at the center of the filter cloth 2. The opening 12a communicates with the groove 11a of the back plate 11 through the through hole 3a of the filter cloth 3. Further, the end face opening of the groove 12a of the front plate 12 is opened so as to communicate with the filtration bed 1b of the squeeze membrane 1. Therefore, at the time of filtration, the filter plates 5 and 6 are tightened, so that the filtrate discharge guide member 1 supported by the filter cloth 3
0 fits into the concave portion 1f of the squeeze membrane 1 to form a filtrate discharge passage of the squeeze membrane 1. That is, the filtrate flowing down the filtration bed 1b of the squeeze membrane 1 enters into the groove 11a of the back plate 11 of the filtrate discharge guide member 10, and the filtrate discharge through hole 3a of the filter cloth 3 and the filtrate discharge opening 12a of the front plate 12 are provided. , The filter cloth 3 of the adjacent ordinary filter plate 5 and the filtrate discharge opening 5f of the ordinary filter plate 5 are inserted. Therefore, the filtrate of the filtration bed 1b of the squeeze membrane 1 is surely recovered and the adjacent ordinary filtration plate 5
Filtrate discharge guide member 1 for discharging to the filtrate hole 5j of
0 is closely fitted into the concave portion 1f of the compressed film 1, and the concave portion 1f and the filtrate discharge guide member 10 are arranged so that the surface thereof is substantially flush with the surface of the frame 1a of the compressed film 1.
It is preferable to perform the dimensional configuration. As the material of the filtrate discharge guide member 10, synthetic resin, metal or the like is preferable, and as long as it has such rigidity that the filtrate discharge passage is not deformed by being crushed by the pressure at the time of tightening the filter plate and the pressure at the time of squeeze filtration, Any material can be used. In this case, even if the material is slightly rigid, the groove 11a serving as the filtrate discharge passage is formed.
If such a rigid material is used, the width can be reduced or the groove can be composed of a plurality of grooves.
The shape of the groove 11a of the back plate 11 is not limited to the U shape, and various shapes and structures can be adopted.

Corresponding to the squeezed film 1, the substrate 2 is formed in substantially the same shape as the squeezed film 1. That is, as shown in FIG. 1, the substrate 2 includes a rectangular frame-shaped frame 2a, a filtration bed 2b surrounded by the frame 2a, and a stock solution supply port 2d formed by penetrating the filtration floor 2b. Have Ear portions 2h, ..., 2h protruding in the lateral direction are respectively projected at the upper end and the lower end of each side of the frame 2a, and
A through hole is formed in each ear 2h, and three of the four through holes are formed.
One is used as the filtrate discharge holes 2j, 2j, 2j, and the other one is used as a compressed fluid supply hole (not shown) for expanding the compressed membrane. The substrate 2 is formed on each side surface so as to project in the lateral direction, and usually has handle portions for suspending and supporting and moving the press filter plate 6 on a pair of side plates of the filter press, but not shown. .

The squeezed membranes 1 are covered on both sides of the substrate 2 so that the undiluted solution supply port 1d of each squeezed film 1 communicates with the undiluted solution supply port 2d of the substrate 2 and the frame 1a of each squeezed film 1 is connected.
And the filter bed 1b are the frame 2 of the corresponding surface of the substrate 2, respectively.
Corresponding to "a" and the filter bed 2b, the squeezing filter plate 6 in which the two squeezing membranes 1, 1 and the substrate 2 are integrally joined is configured. On the other hand, the ordinary filter plate 5 has substantially the same structure as the substrate 2, and as shown in FIG. 11, a rectangular frame-shaped frame 5a, a rectangular frame-shaped inclined portion 5c inside thereof, and the inclined portion 5 are formed.
A filtration bed 5b surrounded by c and formed in the center through the stock solution supply port 5d, and a pair of filtrate discharges for collecting the filtrate flowing through the filtration bed 5b of the ordinary filter plate 5 which is opened in the inclined portion 5c. Openings 5e, 5e, a filtrate discharge opening 5f opened in the frame 5a, and a filtrate hole 5j formed through the ear portion 5h.
And a passage 5n that connects the three openings 5e, 5e, 5f with the filtrate hole 5j. Therefore, in the above filter press, as shown in FIGS. 12 and 13, a pair of filter cloths 3, 3 are arranged between each squeezing filter plate 6 and each ordinary filter plate 5, and penetrate each filter cloth 3. The formed undiluted solution supply ports 3d are the undiluted solution supply ports 1d of the compressed film 1, the substrate 2, and the ordinary filter plate 5,
It is attached so as to communicate with 2d and 5d, and the stock solution is supplied from the stock solution supply port into the filter chamber 9 formed between the pair of filter cloths 3 by a known method to carry out filtration. , 6 and ordinary filter plates 5, ..., 5 are a state in which a filter plate 3 is sandwiched between filter plates by fastening a known movable plate to a master plate (not shown) with a fastening device. Tighten with
The stock solution is supplied into the filter chamber for filtration. If necessary, a squeezing fluid is supplied between the squeeze film 1 of the squeeze filter plate 6 and the substrate 2 to expand the squeeze film 1 and perform squeeze filtration. The filtrate discharged between the filter cloth 3, the ordinary filter plate 5, and the press filter plate 6 in each filter chamber 9 travels along the surface of the filter bed 1b of the press membrane 1 of the press filter plate 6 and the filtrate discharge guide member 10 is provided. Of the filter cloth 3 into the groove 11a of the back plate 11, the filtrate discharge through hole 3a of the filter cloth 3, the filtrate discharge opening 12a of the front plate 12 and the filter cloth 3 on the adjacent ordinary filter plate side,
The ordinary filter plate 5 enters the filtrate discharge opening 5f, and the passage 5
It enters into the filtrate hole 5j via n. The filtrate flowing into the filtrate hole 5j passes through the filtrate hole 2j of the squeezing filter plate 6 and the like and is discharged to the outside of the filter press. The cake remaining between the pair of filter cloths 3 and 3 can be removed by opening the filter plates by a known method. In FIG. 12, 15 is the substrate 2
It is a packing that covers the ears 2h of the above and can be closely attached to the ears of the adjacent filter plates facing each other, and has filter plate holes communicating with the filtrate holes of each filter plate.

According to the first embodiment described above, the filtrate discharge passage is not formed at all in the squeeze membrane 1 itself, and only the filtrate discharge guide member fitting concave portion 1f is formed, and with respect to the formed concave portion 1f, A filtrate discharge guide member 10, which is separately supported by the filter cloth 3 and constitutes a filtrate discharge passage, is fitted and fixed, and the compressed membrane 1 constitutes a filtrate discharge passage. Therefore, the compressed film 1
Since the filtrate discharge passage is not formed in the compressed membrane 1, the filtrate discharge passage is not deformed even if the compressed membrane 1 expands and contracts.
In, it is possible to reliably secure the filtrate discharge passage.
Furthermore, the groove 11a of the back plate 11 which is a filtrate discharge passage for discharging the filtrate of the compressed film 1 does not directly contact the surface of the compressed film 1 and is separated from the surface of the compressed film by the bottom portion 11g. It is possible to effectively prevent the groove 11a from being deformed even when the squeeze film 1 is expanded, and it is possible to more reliably secure the filtrate discharge passage. As a result, the squeeze film 1 can be made of a material that is not easily broken, is thin, and is easily deformed without giving any consideration to securing the filtrate discharge passage. Further, since the filtrate discharge opening 12a of the front plate 12 of the filtrate discharge guide member 10 and the filtrate discharge opening 5f of the ordinary filter plate 5 are made to communicate with each other, the filtrate of the filtration bed 1a of the squeeze membrane 1 is guided to the filtrate discharge guide. From the groove 11a of the member 10 to the filtrate discharge through hole 3a and the opening 12a, the filter cloth 3 is introduced into the opening 5f of the adjacent ordinary filter plate 5, and the filtrate is discharged to the filtrate hole 5j through the passage 5n. Therefore, the filtrate discharge guide member 10 is only pressed flatly in the thickness direction of the filter plate by the frame 5a of the adjacent normal filter plate 5, and is less likely to be deformed to other places. With respect to the pressing force, the groove 1 of the back plate 11 of the filtrate discharge guide member 10
Since the intermediate column 11b is formed so as to enter the la 1a, the filtrate discharge guide member 10 is not crushed. Therefore, even if the squeezing pressure becomes high, the squeezing membrane 1
Filtrate discharge opening 1 of filtrate discharge guide member 10 fitted to
Since 2a is not clogged, the dischargeability of the filtrate is not impaired. Further, in the past, the squeeze membrane 1 was sometimes deformed and damaged at the hole portion penetrating the squeeze membrane 1, but since it is not necessary to form the hole portion penetrating the squeeze membrane 1 itself, this Such a problem can be effectively prevented. Further, it is not necessary to form the through hole in the substrate 2 either, and the processing becomes simpler. The present invention is not limited to the above-mentioned first embodiment, and can be implemented in various other modes.

As a second embodiment of the present invention, for example, FIG.
4 to 17, the filtrate discharge guide member 10 is supported by the mounting screws 13 and 13 in a state where the front plate 12 and the back plate 11 are directly overlapped with each other on the compressed film side of the filter cloth 3. May be. Further, as a third embodiment of the present invention, FIG.
As shown in FIGS. 21 to 21, the filtrate discharge guide member 10 is formed by omitting the front plate 12 and simplifying the back plate 11 so that the back plate 11 is attached to the filter cloth 3 with the attaching screws 13 and 13. May be. In this third embodiment, the groove 11 of the back plate 11 is
The portion of a that communicates with the opening 3a of the filter cloth 3 corresponds to the opening 12a in the first and second embodiments. The fourth aspect of the present invention
As the filtrate discharge guide member 17 according to the embodiment, FIG.
As shown in 25, the front plate 12 and the back plate 11 of the second embodiment may be integrally formed by one thick plate.
In the figure, 17a is a groove 11a of the back plate 11 in the second embodiment.
17b corresponds to the opening 12a of the front plate 12 of the second embodiment.
17c is an intermediate pillar 11 of the back plate 11 of the second embodiment.
17g corresponds to the bottom portion 11g of the back plate 11 in the second embodiment. The filtrate discharge guide member 18 according to the fifth embodiment of the present invention is not supported by the filter cloth 3 but directly by the squeeze membrane 1. This filtrate discharge guide member 18 is, as shown in FIGS.
Sloped engaging portions 18c are formed on the remaining three side surfaces of the filtrate discharge guide member 17 of the embodiment excluding the compressed membrane filtration bed side, and the recessed portions 1 of the compressed membrane 1 corresponding to these engaging portions 18c.
It is formed by forming engagement recesses 1g cut in three corresponding side surfaces of f. In the figure, 18a corresponds to the groove 11a of the back plate 11 of the second embodiment, 18b corresponds to the opening 12a of the front plate 12 of the second embodiment, and 18d is the middle of the back plate 11 of the second embodiment. Corresponds to the pillar 11b, 17g is the second
It corresponds to the bottom portion 11g of the back plate 11 in the embodiment. Therefore, as shown in FIG. 32, the filtrate discharge guide member 18 positions the filtrate discharge guide member 18 on the compressed film 1 by engaging the engaging portion 18c thereof with the engaging recess 1g of the recess 1f of the compressed film 1. Make sure to attach it securely. Also, FIGS.
As shown in FIG. 4, the substrate 2 and the adjoining ordinary filter plate 5 may be composed of only a frame body which has no filtration bed and surrounds the space 19 with a frame. Further, the concave portion 1f of the squeezing membrane 1 is not limited to one formed to be slightly lower than the filter bed 1b as shown in FIG. 4, but may be formed on the same plane as the filter bed 1b, and instead of the adjacent ordinary filter plate 5. A recess 5g may be formed in a portion facing the filtrate discharge guide member 10. Further, in the third embodiment, when the filtrate discharge guide member 10 is composed of the back plate 11 with the front plate 12 omitted, the recess 5g may be eliminated. further,
In the above embodiment, the filtrate discharge guide member fitting concave portion 1f for holding the filtrate discharge guide member 10 at a predetermined position of the squeeze film 1 is formed in the squeeze film 1, but it is formed in the squeeze film 1. Alternatively, the concave portion may be formed in the ordinary filter plate 5 facing the compressed film 1. That is, as shown in FIGS. 35 and 36, in the portion of the ordinary filter plate 5 adjacent to the squeezing membrane 1 facing the filtrate discharge guide member 10, the above-mentioned filtrate discharge opening 5f is located in the center and a substantially quadrangle inclined surface. It is also possible to form a concave portion 5t having a circumference and to fit the filtrate discharge guide member 10 into the concave portion 5t when the filter plate is tightened. Even in this case, the same operational effects as those of the above-described embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a partial front view showing a squeezing filter plate and a normal filtering plate using a squeezing unit of a filter press according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a substrate of the compression unit and a compression film.

FIG. 3 is a partial rear view of the compressed film.

4 is a cross-sectional plan view showing the relationship between the compressed film and the substrate taken along the line AA of FIG.

FIG. 5 is a partial front view of the filter cloth to which the filtrate discharge guide member of the compression unit is attached.

6 is a sectional view taken along line BB of FIG.

7 is a cross-sectional view taken along the line CC of FIG.

FIG. 8 is a cross-sectional view taken along the line DD of FIG.

FIG. 9 is a partial front view of the compression unit.

10 is a cross-sectional view taken along the line EE of FIG.

FIG. 11 is a partial front view of an ordinary filter plate corresponding to the pressing unit.

FIG. 12 is a cross-sectional view of the normal filtration plate and the compression filtration plate having the compression unit when cut along the line FF in FIG. 11 during compression filtration.

FIG. 13 is an explanatory diagram showing a relationship between the compressed film and the filter cloth.

FIG. 14 is a front view of a squeezing unit according to a second embodiment of the present invention.

15 is an enlarged cross-sectional view taken along the line HH of FIG.

16 is an enlarged cross-sectional view taken along line I-I of FIG.

FIG. 17 is an enlarged sectional view taken along line JJ of FIG.

FIG. 18 is a front view of a squeezing unit according to a third embodiment of the present invention.

FIG. 19 is an enlarged sectional view taken along line KK of FIG.

20 is an enlarged cross-sectional view taken along line LL in FIG.

FIG. 21 is an enlarged cross-sectional view taken along line MM in FIG.

FIG. 22 is a front view of a filtrate discharge guide member of a squeezing unit according to a fourth embodiment of the present invention.

FIG. 23 is a side view of the filtrate discharge guide member of FIG. 22 seen from the direction of line NN.

24 is a cross-sectional view of the filtrate discharge guide member of FIG. 22 taken along the line OO.

25 is a cross-sectional view of the filtrate discharge guide member of FIG. 22 taken along the line P-P.

FIG. 26 is a partial front view showing the relationship between the squeeze film of the squeeze unit and the substrate of the squeeze filter plate according to the fifth embodiment of the present invention.

27 is a front view of a filtrate discharge guide member used in the fifth embodiment of FIG. 26. FIG.

28 is a side view of the filtrate discharge guide member of FIG. 27 as seen from the direction of the line QQ.

29 is a cross-sectional view taken along the line RR of FIG.

30 is a cross-sectional view taken along the line S-S of FIG. 27.

FIG. 31 is a sectional view taken along line TT of FIG. 27.

32 is a front view of a member showing the relationship between the squeezing unit having the filtrate discharge guide member of FIG. 26 and the substrate of the squeezing filter plate. FIG.

FIG. 33 is a front view of a member of a compression membrane to which a compression unit according to a modified example of the present invention is attached.

34 is a cross-sectional view of the squeeze filter plate having the squeeze filter unit and the ordinary filter plate when cut along the line U-U in FIG. 33 during squeeze filtration.

FIG. 35 is a partial front view of an ordinary filter plate for using the pressing unit according to the modified example of the present invention.

FIG. 36 is a cross-sectional view of a squeezing filter plate having a squeezing unit according to a modification of the present invention and the ordinary filter plate of FIG. 35.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressed film, 1a ... Frame, 1b ... Filtration bed, 1d ... Undiluted solution supply port, 1f ... Recessed part for fitting filtrate discharge guide member, 1h ... Ear part, 1
j ... filtrate hole, 2 ... substrate, 2a ... frame, 2b ... filtration bed, 2d
... undiluted solution supply port, 2h ... ears, 2j ... filtrate hole, 3 ... filter cloth,
3a ... Through-hole for discharging filtrate, 3d ... Undiluted solution supply port, 5 ... Normal filter plate, 5a ... Frame, 5b ... Filter bed, 5e, 5f ... Filtrate discharging opening, 5h ... Ear part, 5j ... Filtrate hole, 5n ... Passage, 5t
... Filtrate discharge guide member fitting concave portion, 6 ... Squeezing filter plate, 9 ... Filter chamber, 10, 17, 18 ... Filtrate discharge guide member, 11 ... Back plate, 11a, 17a, 18a ... Groove, 11b, 17c, 1
8c ... middle pillar, 11g, 17g, 18g ... bottom, 12 ...
Front plate, 12a, 17b, 18b ... Filtrate discharge opening, 19
... Space, 13 ... Mounting screw, 50 ... Squeezing unit.

Claims (14)

[Claims] 1. A squeeze film (1) which constitutes a squeeze filter plate of a squeeze filter press by covering a substrate (2) having a frame (2a) and a filtrate discharge guide member (10) attached to the squeeze film. The compressed film (1) is adjacent to a frame (1a) formed so as to overlap the frame (2a) of the substrate (2), a filter bed (1b) surrounded by the frame (1a), and adjacent to the frame (1a). The filter plate (5) is formed at a predetermined position of the frame (1a) so as to face the filtrate discharge opening (5f) of the filter plate (5) communicating with the filtrate hole (5j) of the filter plate (5). Filtrate discharge guide member fitting recess (1f) into which the member is fitted
On the other hand, the filtrate discharge guide member (10) is closely fitted into the recess (1f) of the squeeze membrane (1) and is substantially flush with the surface of the frame (1a) of the squeeze membrane. An opening (12a) that has a surface that forms a surface, and that is capable of communicating with the filtrate discharge opening (5f) of the filter plate (5) that communicates with the filtrate hole (5j) of the adjacent filter plate (5). And a filtrate discharge passage (11a) for communicating the opening (12a) with the filtration bed (1b) of the squeeze membrane (1), and between the passage (11a) and the surface of the squeeze membrane (1). A squeezing unit for a filter press, characterized in that it has a partition bottom (11 g). 2. The squeezing unit for a filter press according to claim 1, wherein the filtrate discharge guide member (10) is supported by a filter cloth (3) arranged to face the squeeze membrane. 3. The filtrate discharge guide member (10) is arranged on the back surface of the filter cloth, which is located on the compressed membrane side, and the filtrate discharge passage (11a), the passage (11a) and the compressed membrane (1).
A back plate (11) having a bottom portion (11g) for partitioning the surface of the filter cloth, and the opening (12) arranged on the surface of the filter cloth.
The squeezing unit for a filter press according to claim 2, further comprising a front plate (12) having a) and a connecting member (13) for connecting the back plate and the front plate to support the filter cloth. 4. The filtrate discharge guide member (10) is arranged on the back surface of the filter cloth, which is located on the compressed membrane side, and the filtrate discharge passage (11a), the passage (11a) and the compressed membrane (1).
A back plate (11) having a bottom portion (11g) for partitioning from the front surface of the filter cloth, and a front plate (12) arranged between the back plate and the back surface of the filter cloth and having the opening (12a), The squeezing unit for a filter press according to claim 2, further comprising a connecting member (13) for connecting the back plate and the front plate to support the filter cloth. 5. The filtrate discharge guide member (10) is disposed on the back surface of the filter cloth, which is located on the compressed membrane side, and the filtrate discharge passages (11a, 17a) and the passages (11a, 17).
a bottom part (11) for partitioning between a) and the surface of the squeeze membrane (1)
g, 17g) and the back plate (11, 17) having the opening (11a, 17b), and a connecting member (13) for connecting the back plate and supporting it on the filter cloth. The squeezing unit of the described filter press. 6. The squeeze film forms an engagement recess (1g) cut into the inner surface of the recess, and the filtrate discharge guide member (18) engages with the engagement recess to form the squeeze film on the squeeze film. The squeezing unit for a filter press according to claim 1, further comprising an inclined engaging portion (18c) for fitting and supporting the filtrate discharge guide member. 7. The filtrate discharge guide member (18) is arranged on the back surface of the filter cloth, which is located on the compressed membrane side, and the filtrate discharge passage (18a), the passage (18a) and the compressed membrane (1).
The bottom (18g) that separates the space from the surface of the
b) The pressing unit of the filter press according to claim 6, which further comprises: 8. The filtration bed (1b) of the squeeze membrane (1) comprises:
Arranged to face the space (19) of the substrate (2) of the squeezing filter plate, which is composed of a frame having a space (19) surrounded by the substrate frame (2a). A pressing unit for a filter press according to any one of 1. 9. The adjacent filter plate (5) is a frame (5a).
9. The squeezing membrane is configured by a frame body having a space surrounded by, and the squeezing membrane is arranged so that the space of the framing body faces the filtration bed (1b) of the squeezing membrane (1). The squeezing unit of the filter press according to any one of the above. 10. A squeezing filter plate for a filter press, comprising the squeezing unit according to any one of claims 1 to 9 on the substrate (2). 11. The frame (2) of the squeezing filter plate has a space (19) surrounded by a substrate frame (2a) in a portion of the squeezing membrane (1) facing the filtration bed (1b). The squeeze filter plate of the filter press according to claim 10, which is configured by: 12. A squeeze membrane (1) constituting a squeeze filter plate of a squeeze filter press by covering a substrate (2) having a frame (2a) and a filtrate discharge guide member (10) attached to the squeeze membrane. The compressed film (1) includes a frame (1a) formed so as to overlap with the frame (2a) of the substrate (2), and the frame (1).
While having a filtration bed (1b) surrounded by a), the filtrate discharge guide member (10) has the filtrate of the filter plate (5) communicating with the filtrate holes (5j) of the adjacent filter plate (5). An opening (12a) that can communicate with the discharge opening (5f), and the opening (12)
a) and a filtrate discharge passageway (11a) for connecting the filtration membrane (1b) of the compressed membrane (1) to each other, and a bottom portion (11g) for partitioning the passageway (11a) from the surface of the compressed membrane (1). And the filtrate discharge guide member (1
The filter 0) is adapted to be fitted into a filtrate discharge guide member fitting recess (5t) having the filtrate discharge opening (5f) of the adjacent filter plate (5) at the time of filtration. Press squeezing unit. 13. Filtration bed (1b) of the squeeze membrane (1).
Is arranged so as to face the space (19) of the substrate (2) of the squeezing filter plate, which is constituted by a frame body having a space (19) surrounded by the substrate frame (2a).
The squeezing unit of the filter press described in. 14. The adjacent filter plates (5) have a frame (5).
13. A squeezing membrane comprising a frame having a space surrounded by a), wherein the squeezing membrane is arranged such that the space of the framing body faces the filtration bed (1b) of the squeezing membrane (1). Thirteen
The squeezing unit of the filter press described in.