JPH0331362Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the structure of a filter press, and more particularly to an improvement in the structure of a pressing mechanism.

BACKGROUND ART Conventionally, this type of pressing plate has various structures known. For example, as shown in FIG. 11, the mounting portion of the compressed membrane 51 is
2, and is provided with a protrusion 51a that is located inside from the attachment part and protrudes toward the plate body side, and injects the squeezing fluid between the plate body 52 and the squeezing membrane 51 so that the surface side of the squeezing membrane 51 There is a device configured to squeeze a cake held in a chamber (Japanese Patent Application Laid-Open No. 115973/1983).

Problems to be Solved by the Invention However, in the structure described above, the chamber 54 formed between the pressing plate 50 and the ordinary plate 53 facing the pressing membrane is separated from the pressing part of the pressing membrane and the overbed of the ordinary plate. The space between the projection part 51a and the overbed part is larger than the space between the projection part 51a and the overbed part, so that the chamber volume is large. When moved to the normal board side, the compressed part protrudes more towards the normal board side than the protrusion part, so the cake in the part sandwiched between the protrusion part and the overbed part of the normal board. There was a problem that the cake was not compressed very well, and the moisture content of this part of the cake was higher than the other parts, making it impossible to make the moisture content of the cake uniform.

Therefore, an object of the present invention is to provide a filter press that can substantially uniformize the moisture content of a cake in order to solve the above-mentioned problems.

Means for Solving the Problems In order to achieve the above object, the present invention makes the inclined part of the normal plate face the protruding part of the compressed membrane, and the protruding part and the normal plate are arranged to face each other. The distance between the protruding part and the pressing part is such that the interval between the chambers in the part formed between the inclined part and the overbed part is smaller than the interval between the chambers in the part formed between the pressing part and the overbed part. The chamber volume of the portion formed in between is smaller than that of conventional pressing plates. That is, a compression plate with a compression membrane attached to the surface of the plate body and inflating the compression membrane with a compression fluid supplied from a compression fluid supply passage;
Plates having an overbed part, an inclined part disposed outside the overbed part a, and a frame part arranged outside the inclined part and protruding beyond the overbed part a are alternately arranged, and a pair of cloths is arranged between both plates, and the pressing membrane of the pressing plate is expanded to remove the cake held in the chamber formed between the pair of cloths between the pressing plate and the plate. In the filter press configured to squeeze through, the pressing membrane includes a pressing part arranged opposite to the overbed part of the plate, and a pressing part located outside the pressing part and arranged opposite to the inclined part of the plate. a protrusion that is curved and protrudes in a U-shaped cross section toward the plate main body; and a mounting part that is located outside the protrusion, facing the frame of the plate, and that is attached to the plate main body. The plate main body of the compression plate has a recess on its surface into which the protrusion of the compression membrane is removably fitted, and the opening of the compression fluid supply passage is connected to the protrusion of the compression membrane. While facing
At a predetermined location on the mounting part near the protruding part of the compressed membrane,
A liquid recovery guide member is fixed to open a liquid recovery port toward the chamber side for recovering the liquid flowing out when the cake is squeezed, and when the cake is squeezed, the squeezing fluid is passed through the opening to the plate main body and the squeezing membrane. By supplying the compressed film between 1 and 2, the protruding portion of the compressed membrane comes out of the recess of the plate main body, and the compressed portion is moved substantially along the thickness direction of the plate main body toward the opposing plate.

Effects and Effects of the Invention In the above structure, by arranging the inclined part between the overbed part and the frame part of the ordinary plate to face the protruding part of the compressed membrane, the inclination of the protruding part and the ordinary plate is The space between the part formed between the pressing part and the overbed part is smaller than the part formed between the pressing part and the overbed part, so that the chamber volume in that part is made smaller than that of the conventional pressing plate. Therefore, even if a smaller pressure is applied to the portion between the protruding portion and the inclined portion than other portions, the moisture content of the cake can be lowered, and the moisture content of the cake in this portion can be lowered than other portions. The moisture content of the cake can be made to be approximately the same as that of the cake, and the moisture content of the cake can be made approximately uniform. In other words, in the conventional one,
The interval dimension of the chamber part formed between the pressing part of the pressing membrane and the overbed part of the normal plate, and the interval dimension of the chamber part formed between the protruding part of the pressing membrane and the overbed part of the normal plate were almost the same, or conversely, the former was larger, so the moisture content of the cake between the protruding part and the overbed part was higher than that of the other parts, and the moisture content of the entire cake was higher than that of the cake in other parts. It was not possible to make them uniform.

In addition, since the opening of the squeezing fluid supply passage is provided behind the protruding part of the squeezing membrane, the pressure of the squeezing fluid acts on the protruding part first, and the bent part of the protruding part gradually moves toward the mounting part. As a result, the pressing section can be smoothly moved to the normal plate side along the substantially thickness direction of the plate body, and the cake can be squeezed more smoothly and substantially uniformly. In other words, in the conventional type, since the opening is made on the entire back surface of the pressing membrane, the pressing membrane tends to expand mainly in the part that is easy to expand, and the pressing part cannot be moved approximately parallel to the normal plate side. Things were also hot.

In addition, a liquid recovery guide member is provided at a predetermined location on the attachment part near the protrusion of the squeezing membrane, and an over-recovery port is opened in the chamber even when over-squeezing. The liquid that is not blocked and is squeezed out by the squeezing part can be effectively collected by the guide member.

In addition, if a notch recess is formed at the boundary between the outer side surface of the recess of the plate body and the front surface outside the recess of the plate main body, the protrusion can be formed between the protrusion of the compressed membrane and its attachment part. The degree of freedom is increased, and when the compressed membrane expands, the connecting part between the protruding part and the mounting part can bend freely, making it easier for the protruding part to bend.
The pressing part can be moved more smoothly together with the protruding part. Therefore, it is possible to effectively suppress cracks in the compressed membrane at the connecting portion between the attachment portion and the protruding portion.

Embodiments Below, embodiments of the present invention will be described in detail based on FIGS. 1 to 10.

The filter press according to this embodiment has the first,
As shown in FIGS. 2, 3, and 4, a pressing plate 1 has a pressing membrane 2 attached to the surface of the plate main body 3 and expands the pressing membrane 2 with a pressing fluid supplied from a pressing fluid supply passage 3j, and a central portion. an overbed portion 10a located at the overbed portion 10a, an inclined portion 10b located outside the overbed portion 10a, and a frame portion 10 located outside the inclined portion 10b and protruding beyond the overbed portion 10a.
and the plates 10 having c are arranged alternately, and
A pair of cloths 11, 11 is arranged between both plates 1, 10, and the compression membrane 2 of the compression plate 1 is expanded to create a space between the pair of cloths 11, 11 between the compression plate 1 and the plate 10. The cake is then squeezed out.

The plate main body 3 is made of a roughly rectangular plate,
It has an overbed part 3a, a recessed part 3b located on the outside of the overbed part 3a, and a frame part 3c located further outside of the recessed part 3b and protruding from the overbed part 3a. At each corner of the frame 3c of the main body 3, ears 3e, 3f, 3g, 3h are respectively protruded in the lateral direction of the plate main body 3 (direction perpendicular to the thickness direction),
In the figure, the upper and lower right ears 3e and 3f and the lower left ear 3
Liquid recovery ports 4, 5, and 7 are formed in the upper left ear portion 3g to penetrate through the thickness direction, while a squeeze fluid supply through hole 6 is formed in the upper left ear portion 3g to penetrate in the thickness direction. Between the upper right and lower left liquid recovery ports 4 and 7 and each liquid recovery opening 3l on the surface side of the plate main body 3, there is a communication path 3i that communicates the liquid recovery ports 4 and 7 with each opening 3l, respectively. form. Further, in the overbed part 3a of the plate main body 3, a through-hole 3d for supplying the stock solution is formed in the center thereof, and an annular recess 3k is formed in the outer part of the through-hole 3d. A covering 12 made of a flexible material such as rubber is fixed to the outer surface of the portion on the side of the through-hole. The lower surfaces of the ears 3e and 3g are placed on the side beams 8 and 8 of the filter press, respectively, to guide the back and forth movement of the pressing plate 1. Furthermore, as shown in FIG. 4, the plate main body 3 has an opening for a compression fluid supply passage 3j formed in the bottom surface of the recess 3b to communicate with the recess 3c and the compression fluid supply through-hole 6. let

The compressed membrane 2 is a membrane body made of a well-known flexible material such as rubber, and the opposed ordinary plate 10
A pressing section 2a disposed opposite to the overbed 10a of
, a protruding part 2b located on the outside thereof and facing the inclined part 10b of the normal board 10, and a protruding part 2b located outside of the projecting part 2b and facing the frame part 10c of the normal board 10. The mounting portion 2c is arranged and protrudes from the compressed portion 2a, and completely covers the overbed portion 3a of the plate main body 3.

A pair of cloths 11, 11 are arranged between the compressed membrane 2 and the ordinary plate 10, and both cloths 11,
11, the stock solution is supplied through the stock solution supply through-hole 3d of the plate main body 3 and the stock solution supply port 2d of the pressing membrane 2 to carry out filtration. This pressing board 1 and normal board 1
0, a chamber 13 is formed between the overbed part 10a and the compressed part 2a, but the distance between the inclined part 10b and the protruding part 2b is smaller than the distance between the overbed part 10a and the compressed part 2a. By reducing the size, the cake held between the pair of cloths 11, 11 in the relevant part can be squeezed to the same extent as the cake in other parts.

As shown in FIG. 2, the protruding portion 2b has a J-shaped cross section to be exact, and is preferably formed thinner than the compressed portion 2a and the attachment portion 2c so as to be easily bent. When the protruding part 2b is not inflated, the mounting part side part 2g is formed to be longer than the pressing part side part 2e with respect to the bent part 2f, so that it can be freely extracted into the recessed part 3b of the plate main body 3. They are fitted together, and when inflated, the bending points are shown in FIG.
, the protrusion 2b comes out of the recess 3b, and the compressed part 2a is moved approximately parallel to the thickness direction of the plate body 3 as shown by the dotted line in FIG.

Further, in the center of the compressed portion 2a of the compressed membrane 2, a stock solution supply port 2d is formed at a position corresponding to the stock solution supply through hole 3d of the plate main body 3 so as to penetrate in the thickness direction thereof. Also around this stock solution supply port 2d is an annular protrusion 2h having substantially the same structure as the protrusion 2b.
form. That is, as shown in FIGS. 5 and 6, an annular protrusion 2b having a U-shaped cross section is formed on the outer periphery of the stock solution supply port 2d of the pressing section 2a, and this annular protrusion 2b is inserted into the annular recess of the plate main body 3. 3k, and when the compressed part 2a moves in the thickness direction of the plate main body 3 due to expansion, the annular protruding part 2b also comes out of the annular recess 3k and becomes the compressed part 2a.
Helps movement along the thickness direction of the plate body.

In addition, a liquid recovery guide member having a substantially T-shaped cross section is provided at the liquid recovery port 3 of the plate body 3 near the pair of ears 3e and 3h of the plate body 3 and near the corner of the mounting portion 2c of the pressing membrane 2. A caul plate 9 is fixed, and the through hole 9a of the caul plate 9 and the liquid recovery port 3 are aligned. This patch plate 9 has a liquid recovery groove 9b formed on its surface so that the liquid flowing out when the cake is squeezed in the chamber 13 between the pair of cloths 11, 11 is passed from the liquid recovery port, that is, the groove 9b to the through hole. 9
a. The liquid is guided through the through hole 3 of the plate body 3 and the communication path 3i to the liquid recovery ports 4 and 7, respectively.

According to the above configuration, each plate 10 and each pressing plate 1
The stock solution is supplied between the pair of cloths 11, 11 through the stock solution supply port through-hole 3d of the plate main body 3 and the stock solution supply port 2d of the pressing membrane 2, and filtration is performed. When over-squeezing, the squeezing fluid is supplied from the squeezing fluid supply passage 3j of the plate body 3 through the recess 3c and between the squeezing membrane 2 and the plate body 3 while pressing the protrusion 2b. expand. At this time, the bent portion of the compressed membrane 2 gradually moves from the bent portion 2f at the non-inflated state in the protruding portion 2b to the attachment portion side portion 2g, and the compressed membrane 2a gradually moves to the plate side of the passage (plate main body 3). (on the opposite side) along a direction substantially parallel to the thickness direction of the plate main body 3, and the cake held between the pair of cloths 11, 11 is squeezed in substantially parallel directions. After over-squeezing, the space between the plate 10 and the press plate 1 is opened, and the cake held between the pair of cloths 11, 11 is discharged.

According to the above embodiment, the overbed part 10a of the normal plate 10 and the frame part 1
0c, so that the interval dimension of the chamber portion formed by the part between the protruding part 2b and the inclined part 10b of the normal plate 10 is the same as that of the compressed part of the compressed membrane 2. 2a and overbed part 10a
Since the interval dimension of the chamber part formed between the protruding part 2b and the inclined part 10b is smaller than the chamber volume of the part formed between the protruding part 2b and the inclined part 10b, The moisture content of the cake retained in the portion between the protruding portion 2b and the inclined portion 10b of the normal plate 10 can be made comparable to the moisture content of the cake in other portions. The moisture content of the cake can be made substantially uniform.

Moreover, the fitting recess 3b of the protrusion 2a of the compressed membrane 2
Since the opening of the squeezing fluid supply passage 3j is provided on the bottom surface of the protrusion 2b, the pressure of the squeezing fluid is first
The bending part of the protruding part 2b gradually moves toward the mounting part, and the compressed part 2a can be smoothly moved to the normal board side along the approximate thickness direction of the board body 3. Squeezing can be performed more smoothly and substantially uniformly.

In addition, the mounting portion 2 near the protruding portion 2b of the compressed membrane 2
Since the over-recovery ports 9a and 9b are opened in the chamber 13 by providing a backing plate 9 at a predetermined location of c, the liquid recovery ports 9a and 9b are opened by the squeezing membrane 2 even during over-squeezing.
is not blocked, and the liquid squeezed and flowed out by the squeezing part 2a can be effectively collected by the abutting plate 9.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various other ways.

For example, as shown in FIGS. 7, 8, and 9, the mounting part side surface of the recess 3b of the plate main body 3
A cutout recess 14 having a substantially rectangular vertical section and a fan-shaped cross section is provided at the corner corresponding to the boundary with the surface of the mounting portion.
may be formed. Then, the bent connecting portion between the protrusion 2b and the attachment portion 2c of the compressed membrane 2 is arranged to face the notch recess 14, and the portion of the attachment portion 2c near the protrusion can freely move along with the protrusion 2b into the plate body. 3, so that the bent portion of the protrusion 2b can be moved smoothly, that is, the protrusion 2b can be smoothly moved relative to the recess 3b of the plate body 3.

As a result, the degree of freedom of the protruding part 2b is increased between the protruding part 2b of the compressed membrane 2 and its outer part, and when the compressed membrane 2 is expanded, the protruding part 2b and the attachment part 2c
The connecting part with the protruding part 2 can be bent freely.
b becomes easier to bend, and the pressing portion 2a can be moved more smoothly together with the protruding portion 2b. Therefore, it is possible to effectively suppress cracks in the compressed membrane at the connecting portion between the attachment portion 2c and the protruding portion 2b.

10 and 11 show a top feed type pressing plate 15 in which a stock solution supply port 17 protrudes from the top of the press plate, and a notch recess 16 similar to the above-mentioned notch recess 14 is partially provided near the stock solution supply port 17. An example of the formation is shown below. In this example as well, the same effects as in the above embodiment can be achieved. In addition, in the figure, 1
Reference numeral 8 denotes a spacing plate which is temporarily held between the pressing plate 15 and the ordinary plate 10.

[Brief explanation of drawings]

FIG. 1 is a front view showing a pressing plate of a filter press according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part of the pressing plate near the protruding part of the pressing membrane, and FIG. 3 is a front view of the pressing plate of the pressing plate. Figure 4 is a sectional view of the main part of the liquid recovery part, Figure 4 is a sectional view of the main part of the compressing fluid supply part of the above-mentioned pressing plate, and Figure 5 is an enlarged front view of the vicinity of the stock solution supply port with the right half of the cloth removed. , Figure 6 is a cross-sectional view of the normal plate and pressing plate at the stock solution supply port, Figure 7
The figure is a cross-sectional view of a main part of a pressing plate and a normal plate according to another embodiment, FIG. 8 is a cross-sectional view of a main part of a compressing fluid supply portion of a pressing plate according to another embodiment, and FIG. 10 is a cross-sectional view of the essential parts of the raw solution supply port portion of the pressing plate and the normal plate according to the above other embodiments, and FIG. 10 is the stock solution supply port portion of the pressing plate of FIG. 9 with the right half of the pressing membrane removed. FIG. 11 is a front view and a sectional view of the main parts of a conventional pressing plate and a normal plate. 1... Squeezing plate, 2a... Squeezing part, 2b... Projection part,
2c... Attachment part, 2d... Stock solution supply port, 2e... Squeezing part side part, 2f... Bent part, 2g... Attachment part side part, 2
h... Annular protrusion, 3... Plate main body, 3a... Overbed part, 3b... Fitting recess, 3c... Frame, 3d... Stock solution supply through hole, 3e, 3f, 3g, 3h... Ear part, 3
i...Communication path, 3j...Compression fluid supply path, 3k...
Annular fitting recess, 3l...Liquid recovery opening, 4, 5,
7...Liquid recovery port, 6...Fluid supply port for squeezing, 8...Side beam, 9...Backing plate, 10...Plate, 10a...Overbed part, 10b...Slope part, 10c...Frame part, 11...
Cloth, 12... Covering body, 13... Chamber, 14... Notch recess, 15... Pressing plate, 16... Notch recess, 17... Stock solution supply port, 18... Spacing plate.

Claims (1)

[Claims for Utility Model Registration] (1) A pressing plate 1 with a pressing membrane 2 attached to the surface of the plate main body 3 and expanding the pressing membrane 2 with a pressing fluid supplied from a pressing fluid supply passage 3j;
15, an overbed part 10a, and an overbed part 10a.
an inclined portion 10b disposed outside the inclined portion 10b; and an overbed portion 10 disposed outside the inclined portion 10b;
A plate 1 having a frame portion 10c that protrudes more than a
0 are arranged alternately, and both plates 1, 15,
A pair of cloths 11, 11 are arranged between the cloths 11, 11 between the pressing plates 1, 15, and the pressing membranes 2 of the pressing plates 1, 15 are expanded to create a space between the pair of cloths 11, 11 between the pressing plates 1, 15 and the plate 10. chamber 1 formed in
In the filter press which squeezes the cake held in the plate 10,
A compressed part 2a disposed opposite to the compressed part 2a, and a compressed part 2a located on the outside of the compressed part 2a, disposed opposite to the inclined part 10b of the plate 10, and protrudes in a curved manner with a U-shaped cross section toward the plate main body 3 side. a protrusion 2b,
The plate body 3 of the pressing plate 1, 15 has a mounting portion 2c located outside the protruding portion 2b, facing the frame portion 10c of the plate 10, and attached to the plate body 3. ,
The surface thereof is provided with a recess 3b into which the protrusion 2b of the compressed membrane 2 is removably fitted, and the opening of the compressed fluid supply passage 3j is connected to the compressed membrane 2.
While facing the protruding part 2b of the pressing membrane 2, liquid recovery ports 9a and 9b for collecting the liquid flowing out when the cake is squeezed are opened toward the chamber at predetermined locations of the mounting part 2c near the protruding part of the pressing membrane 2. By fixing the liquid recovery guide member 9 and supplying the squeezing fluid between the plate main body 3 and the squeezing membrane 2 through the opening when the cake is squeezed, the protrusion 2b of the squeezing membrane 2 can be fixed.
The filter press is characterized in that the compressed portion 2a is moved substantially along the thickness direction of the plate body 3 and toward the opposing plate 10 by coming out of the recess 3b of the plate body 3. (2) The filter press according to claim 1, wherein the protruding portion 2b of the compressed membrane 2 is formed thinner than the compressed portion 2a. (3) The compressed membrane 2 has a stock solution supply port 2d in its compression section 2a, and forms an annular protrusion 2h that curves and protrudes in a U-shaped cross section toward the plate body around the stock solution supply port 2d. On the other hand, the plate main body 3 is
A stock solution supply through-hole 3d is provided at a position corresponding to the stock solution supply port 2d of the compressed membrane 2, and the through-hole 3d
The filter press according to claim 1 or 2, which is provided with an annular recess 3k around which the annular protrusion 2h is removably fitted. (4) Utility model registration claim No. 1, in which cutout recesses 14 and 16 are formed at the boundary between the outer side surface of the recess 3b of the plate main body 3 and the surface of the mounting portion 3c of the plate main body 3. The filter press according to any one of items 1 to 3.