JP6024917B2 - Filter press dewatering method - Google Patents

Description

The present invention effectively uses the filter cloth between the filter plates by forming a plurality of filter chambers by arranging a plurality of pairs of filter cloths between the filter plates and simultaneously supplying the stock solution to all the filter chambers. In addition, the present invention relates to a dewatering method for a filter press with an improved filtration capacity.

Conventionally, a filter press having a plurality of filter plates arranged in parallel and a pair of filter cloths between the filter plates presses the stock solution between the pair of filter cloths, and solid-liquid separation is performed by the filter cloths. At this time, filtration is performed between a pair of filter cloths, and the inside of each filter cloth serves as a filtration surface. Therefore, the filter cloth performs filtration on two surfaces with respect to one filtration chamber.

Here, a filter press provided with a pair of filter cloths between filter plates and two mesh bodies disposed between the filter cloths is disclosed in FIG. The two mesh bodies provided between the filter cloths are easy to attach the dehydrated cake formed in the filtration chamber, and prevent the cake from adhering to the filter cloth that becomes the filtration surface when the cake is discharged after the dehydration is completed. .
Further, Patent Document 2 discloses a filter press in which a plurality of filtration chambers are formed between filter plates and the stock solution is alternately supplied to the filtration chambers.

JP 03-242207 A JP 03-033622

In patent document 1, the filtration chamber between filter plates will be divided into three by arrange | positioning two mesh bodies between a pair of filter cloths. However, if the undiluted solution is supplied randomly to the separated filtration chambers, only the filter cloths at both ends function as the filtration surface, and the filtration capability is the same as when using a pair of conventional filter cloths. Furthermore, although not described in Patent Document 1, if all the filtration chambers separated through the stock solution supply path are connected, the stock solution may be concentrated and supplied only to some of the filtration chambers. Can happen.
Moreover, in patent document 2, when supplying a stock solution to several filtration chambers, after supplying a stock solution to the odd-numbered filtration chamber between filter plates, the operation method of supplying a stock solution to the even-numbered filtration chamber is made | formed. . Although filtration with a filter cloth that does not face the filter plate is possible, since a plurality of filtration chambers communicate with each other through the stock solution supply path, supply of the stock solution can be biased and the cake thickness is uneven. Further, for the same reason, it is difficult to make the moisture content of the cake uniform.
The present invention forms a plurality of filtration chambers by arranging a plurality of pairs of filter cloths between the filter plates, and devise a method for supplying the stock solution of the filter press, so that the filter cloths between the filter plates can be separated into solid and liquid. To provide a filter press dewatering method that effectively utilizes and improves the filtration capacity.

A filter in which a plurality of filter plates are arranged in parallel to form a filtration chamber between the filter plates, and a plurality of pairs of filter cloths are arranged in the filtration chamber , and each of the pair of filter cloths divides the filtration chamber into a plurality of filtration chambers. In the press dewatering method , the stock solution is pressed into each filtration chamber at the same time , and a flow path for discharging the filtrate to the sealing surface of the filter plate is formed by a plurality of rejectors arranged in parallel under the filter cloth. By discharging from the discharge passage formed on the sealing surface of the plate and performing solid-liquid separation, the filter cloth between the filter plates can be used effectively, and the filtration area increases. Moreover, it becomes possible to discharge | emit filtrate efficiently even if a several filtration chamber is formed between filter plates by arrange | positioning a rejector.

Each of the filtration chambers is provided with the same number of raw filter supply passages that communicate with the filter plate as the pair of filter cloths arranged in the filtration chamber, and the openings branched from the respective raw solution supply passages communicate with each other between the pair of filter cloths. At the same time, the stock solution can be press-fitted, the supply amount of the stock solution is not uneven, and the cake thickness can be made uniform.

By pressing the stock solution into the filtration chamber and then squeezing with a diaphragm disposed on the filter plate, the cake moisture content can be further reduced, and the cake thickness and moisture content can be made uniform.

Each of the stock solution supply paths is formed through a liquid supply plate disposed between a pair of filter cloths, and the liquid supply plate includes a distribution port that communicates between the pair of filter cloths from the stock solution supply path. A stock solution can be supplied between a plurality of pairs of filter cloths from a stock solution supply path communicating with the plate.

In the filter press dewatering method according to the present invention, a plurality of filtration chambers are formed by arranging two or more pairs of filter cloths between filter plates, and the filtration is usually performed on two surfaces at both ends. It can be filtered between filter cloths.
By supplying the undiluted solution between a pair of filter cloths arranged in a plurality of groups, even a filter cloth not facing the filter plate can be used for filtration, and the filtration surface increases.
By simultaneously supplying the stock solution to each of the plurality of filtration chambers formed between the filter plates, the stock solution is supplied to all the filtration chambers without unevenness, and the thickness of the cake does not vary.

  If the stock solution is pressed into the filtration chamber and then squeezed with a diaphragm disposed on the filter plate, the moisture content of the cake can be further reduced. Moreover, since several filtration chambers are squeezed integrally, the cake thickness and the moisture content can be made uniform. Furthermore, since it can squeeze with one diaphragm with respect to several filter chambers, it becomes unnecessary to arrange | position a diaphragm for every filtration chamber.

  Depending on the properties of the stock solution, it is possible to perform filtration using only one filtration chamber among a plurality of formed filtration chambers, and an operation method in which the stock solution is sequentially supplied to a plurality of other filtration chambers is also possible. Thus, since it respond | corresponds to various operation methods, an operation method can be suitably changed with respect to the fluctuation | variation of a stock solution property.

It is a side view of the filter press concerning the present invention. Similarly, it is a top view of a filter press. Similarly, it is sectional drawing of the dehydration unit of a filter press. Similarly, it is principal part sectional drawing of the filter plate lower part. Similarly, the lower front view of the two filter cloths in the center of the filtration chamber. Similarly, it is a front view of a filter plate. Similarly, it is sectional drawing of a filter plate. It is a schematic side view of the cake peeling apparatus of a filter press similarly. Similarly, it is a schematic side view of another cake peeling apparatus. Similarly, it is a schematic side view of an annular filter cloth cake peeling device Similarly, it is a perspective view of a pair of filter cloths suspended between the filter plates of the filter cloth traveling filter press. Similarly, it is a side view of the cake peeling apparatus of the filter cloth traveling filter press. Similarly, it is a side view of the cake peeling apparatus after the filter cloth traveling of the filter cloth traveling type filter press. Similarly, it is a principal part side view of the filter cloth hanging apparatus hung between the filter plates of the filter cloth traveling type filter press. Similarly, it is a dehydration unit sectional view at the time of stock solution press-fitting. Similarly, it is a dehydration unit sectional view at the time of a pressing process.

FIG. 1 is a side view of a filter press according to the present invention.
In the filter press 1, a dewatering unit 5 is disposed in parallel in a horizontal direction on a guide rail 4 supported on a front frame 2 and a rear frame 3. The dehydrating unit 5 is movably supported on the guide rail 4 and is fastened by an opening / closing device 6 that reciprocates along the guide rail 4 by the driving force of, for example, an electric cylinder or a hydraulic cylinder.

FIG. 2 is a plan view of the filter press according to the present invention.
Hereinafter, description will be made based on a filter press in the case where two pairs of filter cloths are disposed between the filter plates.
The stock solution supply pump 7 supplies the stock solution to the filter press 1 via the stock solution supply pipes 8a and 8b. Valves Va and Vb are disposed in the stock solution supply pipes 8a and 8b, respectively. Depending on the number of the pair of filter cloths arranged between the filter plates, the number of the raw solution supply pipes varies. For example, if three pairs of filter cloths are arranged between the filter plates, the number of the raw solution supply pipes is also three. .
A compressed fluid supply pipe 9 communicates with the dehydration unit 5.

FIG. 3 is a sectional view of the dewatering unit of the filter press according to the present invention.
The dehydration unit 5 has a filter chamber 12 formed inside facing a filter plate 10 having a concave filter bed. One filter plate 10 is provided with a diaphragm 11, and the diaphragm 11 expands by injecting a pressure fluid therein.
Four filter cloths 13 are disposed between the filter plates 10 and 10. The filter cloth 13 includes two pairs of filter cloths 13a and 13b. The two pairs of filter cloths 13a and 13b each form a filtration chamber 12 between the pair of filter cloths. The filtration chamber 12a and the other pair of filter cloths 13b form the filtration chamber 12b.
Since the stock solution is supplied only to the filtration chamber 12 formed between the pair of filter cloths 13, two filters in the middle of the filtration chamber 12, between the filter plate 10 and the filter cloth 13 aL, between the diaphragm 11 and the filter cloth 13 bR. The filtrate is discharged from between the cloths 13aR and 13bL.
In the upper part of the filtration chamber 12, a stock solution supply path 14 for supplying a stock solution such as slurry to be dehydrated to the filtration chamber 12 is provided. The filter plate 10 provided with the diaphragm 11 is formed with a compressed water injection passage 15 that penetrates the filter plate 10 and reaches the diaphragm 11. The compressed fluid supplied from the compressed fluid supply pipe 9 is injected into the diaphragm 11 through the compressed water injection path 15. In the lower part of the filter plate 10, there is provided a filtrate discharge path 16 that communicates with the filtration bed and discharges the filtrate that has permeated from the filtration chamber 12 through the filter cloth 13.
Even when the number of the pair of filter cloths disposed between the filter plates is three or more, the filtrate can be discharged in the same manner.

FIG. 4 is a cross-sectional view of the main part of the lower part of the filter plate.
The filter plate 10 is provided with a filtrate discharge path 16. A drainage passage 16a for discharging the filtrate from the filtration bed is provided in the filtrate discharge passage 16 from the recess of the filter plate 10, and between the two filter cloths 13aR and 13bL in the center of the filtration chamber 12 is provided between the filter plates. There is a discharge path 16 b for discharging permeated waste water to the filtrate discharge path 16. Rejectors 32 such as semi-rigid rubber are fixed to the two filter cloths 13aR and 13bL in the center of the filtration chamber 12 on the surface where they abut. The rejector 32 is sandwiched by a part of the sealing surface of the filter plate 10 to form a gap that allows the filtrate to pass through the discharge path 16b.

FIG. 5 is a lower front view of two filter cloths in the center of the filtration chamber.
The rejector 32 is disposed in parallel to the lower portion of the filter cloth 13, and is attached to a position where the discharge path 16 b of the filter plate 10 is not blocked by the rejector 32. Between a plurality of the rejectors 32, the cake is prevented from flowing out with a narrow width so that the cake is not formed in the discharge passage 16b. By disposing the rejector 32, the flow path to the discharge path 16b is not blocked by the cake, and the filtrate is easily discharged.
Even if the rejector 32 is not provided, drainage is possible only through the gap of the filter cloth 13.

FIG. 6 is a front view of a filter plate according to the present invention.
In the present invention, a plurality of pairs of filter cloths 13 are arranged in one filtration chamber 12, and the stock solution is respectively applied to the plurality of filtration chambers 12 formed by the pair of filter cloths 13. The stock solution supply paths 14 to be supplied are provided separately. When two pairs of filter cloths 13 are arranged, two supply ports 17a and 17b are opened at the upper part of the filter plate 10, and the supply ports 17a and 17b communicate with each other when the filter plate 10 is arranged in parallel. Stock solution supply paths 14a and 14b are formed. The stock solution supply paths 14a and 14b are connected to the stock solution supply pipes 8a and 8b. The stock solution supply path 14a supplies the stock solution to the filtration chamber 12a, and the stock solution supply path 14b supplies the stock solution to the filtration chamber 12b.
When three pairs of filter cloths 13 are provided, the number of the stock solution supply paths 14 is also three, so that three supply ports 17 need to be formed in the filter plate 10.

FIG. 7 is a sectional view of a filter plate according to the present invention.
Two pairs of filter cloths 13a and 13b are arranged between the filter plates 10 and 10, and the filter cloth 13 has liquid supply plates 18a and 18a at positions corresponding to the stock solution supply paths 14a and 14b at the top of the filter plate 10, respectively. 18b is disposed.
The liquid supply plates 18a and 18b have openings so that the stock solution supply paths 14a and 14b communicate with each other, and the stock solutions are supplied from the stock solution supply paths 14a and 14b into the filtration chambers 12a and 12b. Distributing ports 19a and 19b are provided.
(A) is XX sectional drawing of FIG. 6, Comprising: One liquid supply board 18a is arrange | positioned between one pair of filter cloths 13aL and 13aR. (B) is a YY sectional view of FIG. 6, and the other liquid supply plate 18b is disposed between the other pair of filter cloths 13bL and 13bR. By configuring the liquid supply plate 18 in this manner, the stock solution flowing from the liquid supply plate 18a can be supplied to the filtration chamber 12a, and the stock solution flowing from the liquid supply plate 18b can be supplied to the filtration chamber 12b.
When three pairs of filter cloths 13 are provided, the stock solution can be supplied by arranging the liquid supply plate 18 in the same manner.
In the present embodiment, the dehydrating unit 5 is used in which the filter plate 10 provided with the concave portions on both sides and the filter plate 10 provided with the diaphragm 11 on both sides are alternately used. For example, the concave portions are provided on the front surface and the diaphragms are provided on the back surface. 11 may be used as the dewatering unit 5 in which the filter plates 10 provided with 11 are arranged in parallel.

FIG. 8 is a schematic side view of a cake peeling device for a filter press according to the present invention.
As a peeling device for the cake attached to the four filter cloths 13aL, 13aR, 13bL, 13bR, as shown in FIG. 8, a scraper 30 that can move up and down is provided between the filter cloths 13aL, 13aR and between the filter cloths 13bL, 13bR. .
FIG. 9 is a schematic side view of another cake peeling apparatus according to the present invention, and a cake peeling apparatus may be provided by arranging a vibration device 31 for vibrating the filter cloth 13 above the filter cloth 13.

FIG. 10 is a schematic side view of an annular filter cloth cake peeling apparatus according to the present invention.
(A) wraps an annular filter cloth 13 around a roll 29 provided above the filter plate 10 and below the filter plate 10, and the annular filter cloth is attached to the roll 29 provided above and below between the filter plates 10 and 10. The filter cloth 13 can be run by turning 13 and turning the roll 29 by a driving source, and the cake can be peeled off.
(B) is a filter 29 provided below the filter plates 10 and 10, a roll 29 provided above the liquid supply plates 18a and 18b, and a roll 29 provided below the liquid supply plates 18a and 18b. The cloth 13 is hung and the roll 29 is rotated by a driving source, thereby allowing the filter cloth 13 to travel and peeling the cake. The roll 29 and the liquid supply plate 18 are disposed by a known technique.

FIG. 11 is a perspective view of a pair of filter cloths suspended between the filter plates of the filter cloth traveling filter press according to the present invention.
In the filter cloth traveling filter press 1, two pairs of filter cloths 13 are arranged side by side in the filtration chamber 12. The upper edge portions of the pair of filter cloths 13 are bonded together, and the upper filter cloth core 20 is attached to the bonded portions. Lower filter cloth cores 21 are respectively attached to the lower edge portions of the pair of filter cloths 13 joined to the upper edge portions.
Further, the upper portion of the filter cloth 13 has two openings communicating with the stock solution supply paths 14a and 14b, and a liquid supply plate 18 is provided in one of the openings. The liquid supply plate 18 allows the stock solution to flow between the pair of filter cloths 13.
The liquid supply plates 18a and 18b of the two pairs of filter cloths 13a and 13b are arranged symmetrically. The opening where the liquid supply plate 18a of one pair of filter cloths 13a is not provided corresponds to the opening of the liquid supply plate 18b provided above the other pair of filter cloths 13b. Similarly, the opening of the liquid supply plate 18a of one pair of filter cloths 13a corresponds to the opening in which the liquid supply plate 18b of the other pair of filter cloths 13b is not provided. Therefore, when the filter plate 10 is closed, these openings communicate to form the stock solution supply paths 14a and 14b.
When three pairs of filter cloths 13 are provided, the filter cloths 13 have three openings, and a liquid supply plate 18 is provided in each corresponding opening to supply the stock solution between the pair of filter cloths. Is possible.

FIG. 12 is a side view of the cake peeling device of the filter cloth traveling filter press according to the present invention.
8, 9, and 10, as shown in FIG. 12, the lower end of the filter cloth 13 is wound around a roll, and the lower end of the filter cloth 13 is lifted with a chain or the like so that the filtration surface travels downward to peel the cake. Alternatively, a filter cloth traveling type peeling mechanism may be used.
The filter cloth 13 used for the filter cloth traveling type includes two pairs of filter cloths, and uses a total of four filter cloths 13aL, 13aR, 13bL, and 13bR.
The liquid supply plates 18a and 18b provided on the pair of filter cloths 13a and 13b are disposed between the pair of filter cloths, and the stock solution that has passed through the liquid supply plates 18a and 18b passes between the pair of filter cloths through the distribution ports 19a and 19b. The dehydrated cake is formed between the pair of filter cloths.

FIG. 13 is a side view of the cake peeling apparatus after running the filter cloth of the filter cloth running filter press according to the present invention.
Since the lower filter cloth cores 21 are pulled up by the traveling chains 22 wound around the filter plate upper sprocket 24 and the filter plate upper sprocket 28, the filter cloth 13 travels downward, and then the filter plate return roll 26 or filter. The plate travels upward from the lower part of the filter cloth 13 via the inter-plate return roll 27.
After the cake is peeled off, the filter plate upper sprocket 24 and the filter plate upper sprocket 28 are reversed, and the filter cloth 13 is returned to its original position to start dewatering.
The inter-filter-plate upper sprocket 28 and the inter-filter-plate return roll 27 are configured to be positioned in the middle of the filter plate 10 that is opened and closed by a known method.

FIG. 14 is a side view of an essential part of a filter cloth hanging device suspended between filter plates of a filter cloth traveling filter press according to the present invention.
A pair of drive chains 22 and 22 are connected to both ends of the upper filter cloth mandrel 20 inserted through the upper edges of the two pairs of filter cloths 13a and 13b. A pair of upper brackets 23, 23 are erected on the shoulder of the filter plate 10, and a filter plate upper sprocket 24 is pivotally attached to the upper bracket 23. A drive chain 22 a of one pair of filter cloths 13 a is wound around the filter plate upper sprocket 24. Further, an upper inter-filter plate sprocket 28 is disposed between the filter plates 10 and 10 , and a drive chain 22 b of the other pair of filter cloths 13 b is wound around.

One ends of the drive chains 22a and 22b are connected to upper filter cloth cores 20 and 20 disposed on the upper edges of the filter cloths 13a and 13b, respectively. The other end of the drive chain 22 a that is wound around the filter plate upper sprocket 24 and suspends the filter cloth 13 a is suspended from the back surface side of the filter plate 10. A pair of filter plate return rolls 26 are supported on a lower bracket 25 that hangs from the lower ends of both sides of the filter plate 10. The lower part of the filter cloth 13aL is wound around one filter plate return roll 26b, and the lower filter cloth core 21 of the filter cloth 13aL and the drive chain 22a suspended from the back side of the filter plate 10 are locked.

A pair of inter-filter return rolls 27 is disposed below the filter plates 10 and 10 . The lower part of the filter cloth 13aR is hung on one of the return rolls 27a between the filter plates, and the lower filter cloth core 21 of the filter cloth 13aR is connected to the drive chain 22b hung on the upper sprocket 24 between the filter boards.
The lower part of the filter cloth 13bL is wound around the other filter plate return roll 27b and connected to the drive chain 22b.
The lower part of the filter cloth 13bR is wound around the other filter plate return roll 26a of the adjacent filter plate 10, and the lower filter cloth core 21 of the filter cloth 13bR is placed on the back side from the filter plate upper sprocket 24 of the adjacent filter plate 10. The drive chain 22a is suspended.

A filter plate upper sprocket 24, an inter-filter plate upper sprocket 28, a filter plate return roll 26, and an inter-filter plate return roll 27 are provided so that the filter cloth 13 and the filter plate 10 do not come into contact with each other while the filter cloth is running. If present, a roll 29 may be additionally provided as shown in FIGS.
When the cake is discharged, the filter cloth 13 is caused to travel downward by rotating the filter plate upper sprocket 24 and the inter-filter upper sprocket 28 with a drive source (not shown), and the lower filter cloth core 21 is moved by the drive chain 22. Be raised.
The cake with good peelability is dropped and discharged together with the opening of the filter plate 10, and the cake attached to the filter cloths 13aL, 13aR, 13bL, and 13bR is sharpened by the filter cloth 13 at the filter plate return roll 26 and the inter-filter plate return roll 27. It peels by being reversed.

  The solid-liquid separation of the filter press is performed as follows. Although this embodiment is an example of a filter press in which two pairs of filter cloths are disposed between the filter plates, operation is possible even when three or more pairs of filter cloths are disposed by the same operation.

(Closing plate process)
The filter plate 10 arranged in parallel by the switchgear 6 ... Is closed and tightened to form a large number of filtration chambers 12 ... And the supply port 17 is connected to connect the stock solution supply path 14. Form.

(Press-fit process)
FIG. 15 is a cross-sectional view of the dehydrating unit when the stock solution is injected according to the present invention.
The valves Va and Vb disposed in the stock solution supply pipes 8a and 8b are simultaneously opened, and the stock solution supply pump 7 is started.
The stock solution is simultaneously press-fitted from the stock solution supply pipes 8a and 8b into the filtration chambers 12a and 12b disposed between the filter plates 10 and 10 through the stock solution supply paths 14a and 14b and the liquid supply plates 18a and 18b. The undiluted solution is evenly distributed in each filtration chamber 12, and the filtrate is discharged between the filter plate 10 and the filter cloth 13aL, between the filter plate 10 and the filter cloth 13bR, and further between the filter cloth 13aR and the filter cloth 13bL. The filtrate that has permeated through the filter cloth 13 is discharged to the outside from the filtrate discharge path 16 through a discharge path 16 a provided in the filtration bed and a discharge path 16 b provided below the filter plate.
The press-fitting process continues for a fixed period of time. Solid content accumulates in the filtration chambers 12a and 12b to form a cake.

(Pressing process)
FIG. 16 is a cross-sectional view of the dehydrating unit during the pressing process according to the present invention.
After injecting sludge for a certain period of time, the diaphragm 11 of the filter plate 10 is expanded, and the pressing process is performed on the cake in the filtration chamber 12.
Specifically, the compressed fluid supply device is activated. The compressed fluid supplies the pressurized fluid into the diaphragm 11 formed in the filter plate 10 via the compressed fluid supply pipe 9 and the compressed water injection path 15 to expand the diaphragm 11.
The cake is squeezed with the filter cloths 13aL, 13aR, 13bL, and 13bR by squeezing with the diaphragm 11, and the filtrate is discharged. The filtrate is discharged from the filtrate discharge path 16 to the outside through a discharge path 16a provided in the filtration bed and a discharge path 16b provided below the filter plates.
Moreover, when the moisture content of the cake formed in the filtration chambers 12a and 12b is different during the press-fitting process, the filtration chambers 12a and 12b are simultaneously squeezed in the squeezing process, so a cake with a uniform moisture content can be formed. It becomes.
The pressing process continues for a fixed period of time. Moreover, when solid-liquid separation is performed only by a press-fitting process such as press-fitting for a long time, the pressing process may be omitted. At this time, the diaphragm 11 disposed on the filter plate 10 is not necessary.

(Opening process)
After performing the squeezing process for a certain time, the squeezing fluid supply device is stopped, and the pressure fluid supplied to the diaphragm 11 is discharged.
The filter plate 10 is opened at regular intervals by the opening / closing device 6. The opened cake in the filtration chamber 12 is discharged downward by a cake peeling device. Since the cake fixed to the filter cloth 13 has a constant moisture content, there is no defective peeling from the filter cloth 13.

The dewatering method of the filter press according to the present invention is a method in which a plurality of a pair of filter cloths are arranged in one filtration chamber, the filtration surface can be increased more than usual, and the processing capacity is improved by devising the operation method. Can be planned. The operation method can be switched according to the dewatering property of the sludge, and when the dewatering property is good, it is possible to appropriately cope with the change of the sludge property by squeezing. Moreover, the dehydration method of this filter press can cope with various operation methods such as simultaneous press-fitting into a plurality of filtration chambers, stepwise press-fitting, and further press-fitting the stock solution after pressing.

DESCRIPTION OF SYMBOLS 1 Filter press 10 Filter plate 11 Diaphragm 12, 12a, 12b, ... Filtration chamber 13a, 13b, ... Filter cloth 14a, 14b, ... Stock solution supply path 18a, 18b, ... Liquid supply plate 19a, 19b, ... Distribution port 32 Rejector

Claims (4)

A plurality of filter plates (10 ...) are arranged in parallel to form a filtration chamber (12) between the filter plates,
While arranging a plurality of pairs of filter cloths (13a, 13b, ...) in the filtration chamber (12),
In the dehydration method of the filter press 1 in which the filtration chamber (12) is divided into a plurality of filtration chambers (12a, 12b,...) With a pair of filter cloths (13a, 13b,...), Respectively.
The stock solution is simultaneously pressed into each filtration chamber (12a, 12b, ...) ,
A flow path for discharging the filtrate to the sealing surface of the filter plate (10) is formed by a plurality of rejectors (32...) Arranged in parallel with the lower part of the filter cloth,
A method of dewatering a filter press , wherein the filtrate is discharged from a discharge passage (16b) formed on the sealing surface of the filter plate (10) for solid-liquid separation. As many as the number of the pair of filter cloths (13a, 13b,...) Disposed in the filtration chamber (12) has the stock solution supply path (14) communicating with the filter plate (10).
2. The filter press according to claim 1, wherein the openings branched from the respective stock solution supply paths (14 a, 14 b,...) Communicate with each other between the pair of filter cloths (13 a, 13 b,...) . Dehydration method . 3. The squeezing is performed by a diaphragm (11) disposed on the filter plate (10) after the stock solution is pressed into the filtration chamber (12 a, 12 b,...). How to dehydrate the filter press. The stock solution supply passages (14a, 14b,...) Pass through liquid supply plates (18a, 18b,...) Disposed between a pair of filter cloths (13a, 13b,...), Respectively. Forming,
The liquid supply plates (18a, 18b,...) Have distribution ports (19a, 19b,...) That communicate between the stock solution supply passages (14a, 14b,...) And the pair of filter cloths (13a, 13b,. The filter press dewatering method according to claim 2 or 3, further comprising :

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