JPH0339724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a filter press in which a pair of cloth is sandwiched between adjacent plates, and more particularly to an improvement in the structure of the plates.

BACKGROUND ART Conventionally, filter presses of this type with various structures are generally known. A typical example is a structure in which a large number of boards are suspended and supported between front and rear stands so that they can move back and forth, and a pair of cloth is sandwiched between adjacent boards to form a chamber between the opposing cloths, allowing the movable board to move forward. There is a device in which the entire plate is tightened toward the front stand, and filtration is performed by supplying the stock solution from the stock solution supply pipe of the front stand to each chamber between the pair of cloths.

Problems to be Solved by the Invention However, with such a structure, the stock solution supply pressure supplied to each of the above chambers decreases from the stock solution supply pipe in the front stand toward the rear stand side due to flow resistance of the stock solution. Therefore, it was difficult for the stock solution to be supplied to the chamber near the rear stand, resulting in problems such as extremely poor overefficiency.

Therefore, an object of the present invention is to solve the above-mentioned problems by being able to sufficiently supply a stock solution even to the chamber located at the farthest position from the chamber where the stock solution is initially supplied, thereby reducing overefficiency. The objective is to provide a filter press that can increase the

Means for Solving the Problems In order to achieve the above object, the present invention provides a method for increasing the volume of the chambers and the chamber area of the plate from the first chamber to which the undiluted solution is supplied to the last chamber to which the undiluted solution is supplied. was designed so that it gradually becomes smaller. In other words, the thickness of all the plates in the front and back direction is the same, and each plate is made up of chambers, and the size of the chambers gradually increases from the chamber where the stock solution is initially supplied toward the stand side. It was configured to be small.

Effect of the Invention In the above structure, after the plurality of plates are fastened to the front stand side by the movable plate, the undiluted solution is poured into the chamber adjacent to the front stand, the plate adjacent to the movable plate, or any one of all the plates. First, the stock solution is supplied through the stock solution supply port of the cloth to an adjacent chamber having a smaller excess area than the above-mentioned chamber, and thereafter, the stock solution is sequentially supplied to adjacent chambers having a smaller excess area, Filter the stock solution in each chamber.

Examples Examples according to the present invention will be described in detail below with reference to FIGS. 1 to 16.

The filter press according to this embodiment has the first and second
As shown in the figure, side beams 4, 4 are arranged on both sides between the front and rear stands 1, 2, and a large number of plates 6 consisting of only frames 6h are arranged between the front and rear stands 1, 2, and the above-mentioned While being suspended and supported by the side beams 4, 4, a pair of cloths 5, 5 are arranged so as to be sandwiched between adjacent plates 6, 6, and each cloth 5 corresponds to the oversurface in the frame 6h of the plate 6. A plurality of stock solution supply ports 7, 7 are formed at predetermined locations of the part, and a stock solution supply pipe 1a is provided at the top center protrusion 6i of each plate 6 and the top center of each cloth 5. Communication ports 6f and 5a for stock solution supply are formed, respectively, and the communication ports 6f and 5a of any one of the plates 6 are connected to the oversurface in the frame 6h of the plate 6. Further, as it goes from the stock solution supply board 61 toward both stands 1 and 2, the area of the surface inside the frame 6h of the board 6 is gradually reduced. Configure. Then, by driving the movable plate 3 arranged behind the rearmost plate 6 forward by driving the drive device 10, all the plates 6 are tightened toward the front stand, and the liquid supply pipe 1a at the top of the front stand 1 is Through the communication ports 6f and 5a of each plate 6 and each cloth 5, the liquid is passed through the undiluted solution supplying plate 61, that is, into each chamber 9 between the pair of cloths 5 and 5 arranged on both sides of the undiluted solution supplying plate 61. The stock solution is then supplied through the stock solution supply port 7 of each cloth 5 into the adjacent chambers 9 in order to carry out filtration.
In FIG. 1, 1b is a liquid recovery pipe formed at each side of the lower part of the front stand 1, 3a is a stock solution supply pipe formed at the center of the upper part of the movable plate 3, and 3b is a liquid recovery pipe formed at the center of the upper part of the movable plate 3.
Liquid recovery tubes are formed on each side of the lower part of the tube.

Each of the plates 6 is made of a rectangular frame 6h as shown in FIGS. 1-8. The frame 6h has, on its inner surface, inclined surfaces 6j, 6j which are inclined from the center in the thickness direction to both the front and rear sides, respectively. A handle 6d is provided near the center of each outer surface of each frame 6h, and each handle 6d is slidably mounted on each side beam 4 to suspend and support the plate 6 and guide its back and forth movement. do. Laterally protruding ears 6a are formed at the lower corners of each side surface of the plate 6, and each ear 6a is formed with a liquid recovery port 6b penetrating in the thickness direction. A communication hole 6c communicating with the space 6e inside the plate 6 is formed in a portion extending from the ear portion 6a to the frame body 6h.

In addition, as shown in Fig. 2, from the fourth stock solution supply plate (indicated by 61 in Figs. 1 and 2) arranged in front of the movable plate 3 of the filter press, the front stand side and the rear stand side are Supply stock solution. That is, the upper center of each plate 6 is made to protrude upward in an inverted U shape to form a protrusion 6i, and a communication port 6f for stock solution supply communicating with the protrusion 6i in the front-rear direction.
, and each cloth 5 corresponds to the communication port 6f.
A communication port 5a for stock solution supply is also formed in the stock solution supply plate 61, and a communication opening 6g is formed in the protrusion 6i of the stock solution supply plate 61 to communicate the internal space 6e of the plate 6 and the stock solution supply communication port 6f. Further, the outer shape of the plate 6 is constant and the width of the frame 6h is increased so that the tightening area of the frame 6h gradually increases as it goes from the stock solution supply plate 61 to each stand 1, 2. Therefore, the overarea of plate 6 and therefore chamber 9
gradually decreases. The "tightening area" here refers to the adjacent plate 6 when the plate 6 is tightened.
This refers to the total area of the side surface of the stand of the frame 6h that can be contacted via the cloths 5, 5.

The cloths 5 are arranged replaceably at the front and rear of each plate 6, so that the inner space 6e of the plate 6 is sandwiched between the pair of cloths 5, 5. A pair of cloths 5, 5 arranged on both sides of the stock solution supplying plate 61 and each plate 62 are inserted into the communication ports 6f of the plates 61, 62 in the portions corresponding to the communication ports 6f of each plate 61, 62. The fabrics 5 and 5 are sewn together to form a communication opening 5a to prevent the undiluted solution from entering between the two fabrics 5 and 5. Other boards 63, 64, 65, 66, 6
Each of the cloths 5 disposed on both sides of the plate 7 forms a communicating hole 5a corresponding to the communicating hole 6f of each plate 6. In addition, various numbers of stock solution supply ports 7 are formed at various positions, as shown in FIGS. 2 to 8, in portions corresponding to the oversurfaces of the frame 6h of each plate 6 of each cloth 5. That is, each cloth 51 and the plate 6 arranged on both sides of the stock solution supply plate 61
As shown in FIGS. 2 and 3, stock solution supply ports 7, 7, 7, form 7. Each stock solution supply port 7 is formed by fitting eyelet fittings from both sides of the cloths 51 and 52 to form a circular through hole.
1 and between both cloths 52, 52, respectively. In the excess portion of each cloth 53 disposed on each plate 63 adjacent to each plate 62, stock solution supply ports 7, 7, 7 are formed at positions corresponding to the apexes of the triangle, as shown in FIG. Also,
Each board 6 adjacent to the stand side of each board 63 above
As shown in FIG. 5, three stock solution supply ports 7, 7, 7 are formed along the diagonal line of the frame 6h in the upper part of each cloth 54 arranged in the frame 6h. Further, as shown in FIG. 6, two cloths 55 arranged on the plate 65 adjacent to the front stand side of the plate 64 on the front stand side are provided with two cloths along the diagonal line of the frame 6h.
The stock solution supply ports 7, 7 are formed. Further, as shown in FIG. 7, two stock solution supply ports 7, 7 are provided along the vertical direction of the frame body 6h in the excess portion of each cloth 56 arranged on the plate 66 adjacent to the front stand side of the plate 65. form. Further, in the excess portion of the cloth 57 of the plate 67 adjacent to the front stand side of the plate 66, there is a stock solution supply port 7 in the center as shown in FIG.
Form one. The number and position of the stock solution supply ports 7 are determined depending on the properties of the stock solution, the stock solution supply pressure, the excess area within the frame 6h, etc. They do not need to be evenly spaced. The size of the stock solution supply port 7 is preferably as small as possible so as not to reduce the excess area. In addition, the cloth 5 closest to the front stand 1
8 and the cloth 58 closest to the movable plate 3 has a communication port 5.
A is only formed, but the stock solution supply port 7 is not formed.

A filter press is constructed by arranging a large number of the cloths 5 having the stock solution supply ports 7 formed on both sides of each plate 6 between the front and rear stands 1 and 2. In this state, the excess area of the plate 6 gradually decreases from the stock solution supply plate 61 toward the stands 1 and 2.

According to this configuration, it operates as follows.

That is, by moving the movable plate 3 forward, all the plates 6,
..., 6 to the front stand side to close the frame, for example, the stock solution is supplied to each chamber from the stock solution supply pipe 1a of the front stand 1 through the stock solution supply communication port 6f of each plate 6 and the communication port 5a of each cloth 5. The raw solution is sent to the stock solution supply plate 61 without being supplied to the stock solution supply plate 9. Then, the stock solution is supplied through the communication opening 6g in the plate 61 into the chambers 91, 91 on both the front and rear sides of the stock solution supply plate 61. When each chamber 91 is almost filled with the stock solution, each chamber 9 adjacent to the stand side and having a smaller excess area than the chamber 91 is filled with the stock solution.
At step 2, the stock solution begins to be supplied through the stock solution supply port 7. Thereafter, the stock solution is sequentially supplied to the chambers 9 adjacent to the stand side and having a small excess area, until the final chamber 9 is supplied with the stock solution, and each chamber 9 is filled with the stock solution. When the stock solution is supplied into each chamber 9, filtration starts, and when the stock solution almost fills the chamber 9, filtration is accelerated, and the cake is held between the pair of cloths 5, 5, and the liquid is passed through the cloth 5. The liquid flows downward and is collected into the liquid recovery ports 6b, 6b of the plate 6. After one overstep is completed, as is well known, the movable plate 3 is moved back and each plate 6 is moved back, and the cake held by the pair of cloths 5, 5 between the plates 6, 6 is collected, and the next step is carried out. Be prepared for the past.

According to the above embodiment, the overarea is formed so that it gradually decreases from the stock solution supply plate toward both stands, so that even if the stock solution supply pressure decreases due to flow resistance during stock solution supply, the stock solution supply pressure can be maintained. The stock solution can be supplied to each chamber at approximately the same pressure as the stock solution supply pressure supplied to the chambers on both sides of the stock solution supply plate without any drop. Therefore, even the chamber farthest from the stock solution supply plate can be sufficiently filled with the stock solution, improving overefficiency. Moreover, since the stock solution supply pressure becomes approximately uniform in each chamber 9, the moisture content of the cake in each chamber 9 can be made approximately uniform. Furthermore, even if the stock solution has a property that it cannot flow smoothly from chamber 9 to chamber 9, a flow gradient can be generated by reducing the above-mentioned excess area. 9 can be filled easily and reliably. Moreover, each plate 6 is composed of only the frame 6h,
A plurality of stock solution supply ports 7 are formed in the upper part of the cloth 5 corresponding to the upper surface of the plate 6, and each cloth 5
Since the undiluted solution is arranged in a replaceable manner, when changing the undiluted solution supply condition depending on the properties of the undiluted solution and overconditions such as overpressure, the board 6 can be arranged between the front and rear stands 1 and 2 and only the cloth 5 can be supplied with the undiluted solution. It is sufficient to replace the cloth 5 with a cloth 5 having a different number or position of the openings 7. Therefore, the number and position of the stock solution supply ports 7 can be easily adjusted, and a drop in the stock solution supply pressure can be effectively prevented, and overefficiency can be improved. In addition, since a plurality of stock solution supply ports 7 are formed on the surface of the frame 6h, the stock solution and gas generated from the stock solution can easily enter and exit through each stock solution supply port 7, and the stock solution can be supplied to the chamber at the same time. The supply pressure of the stock solution supplied into the chamber 9 can be made more uniform throughout the chamber. In addition, since the board 6 is formed only from the frame 6h without forming any overboard inside the frame 6h of the board 6, the board as a whole is better than the conventional one in which an overboard is formed inside the board 6. It will be extremely light.

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

For example, in the above embodiment, the stock solution supply port 7 of the pair of cloths 5, 5 facing each other between the plates 6, 6,
If the positions of the stock solution supply ports 7 are shifted from each other so that the positions of ..., 7 are discontinuous along the front-rear direction, the stock solution will always enter each chamber 9 from the stock solution supply port 7 once, and the stock solution will enter each chamber 9 from the stock solution supply port 7. After a predetermined amount of the stock solution is filled into the chamber, that is, up to the stock solution supply port 7 of the cloth 5 on the side to which the stock solution is supplied, the stock solution is filled into the next chamber 9 through the stock solution supply port 7. The stock solution can be reliably supplied and filled into each chamber 9 from the side. In other words, 1 continuous line along the front-rear direction
When supplying the stock solution through one stock solution supply port 7, depending on the stock solution supply pressure, the stock solution may not necessarily be sufficiently supplied into the chamber 9 before it is supplied to the next chamber 9, and the stock solution may not be fully supplied. The filled chambers 9 and the chambers 9 that were not sufficiently filled with the stock solution coexisted, and the supply and filling of the stock solution into each chamber 9 became uneven, resulting in a decrease in overefficiency. However, by doing as described above, such problems can be reliably solved.

In addition, the stock solution is supplied not only from the stock solution supply pipe 1a of the front stand 1, but also from the stock solution supply pipe 3 of the movable plate 3.
The stock solution may be supplied from a.

Further, the hole shape of each stock solution supply port 7 is not limited to a circular shape, but may be any shape such as a hexagonal shape or a rectangular shape. In addition, the stock solution supply port 7 is not limited to being formed with an eyelet fitting, but may be formed by applying an annular member from both sides of the cloth 5 and tightening both members, or by making a hole in the cloth 5 and connecting the surroundings of the hole with each other. It may be formed by sewing, or it may be formed by applying the cloth and then sewing the cloth and the cloth 5 together.

Further, the shape of each of the plates 6 is not limited to a rectangular shape, but may be any shape such as a circle.

Further, the communication port 6f for supplying the stock solution may be provided by forming a protrusion in the lower part of the plate 6.

Further, as shown in FIGS. 9 to 15, as each plate 8 moves away from the movable plate 3, that is, as it moves from the plate 81 to the plate 86, the tightening area of the frame 6h gradually increases and the over area gradually decreases. It may be formed as follows. In this case, in each cloth 11, the stock solution supply port 7 is formed in the center of the upper surface of each plate 8 to communicate in the front and back direction, and the stock solution supply pipes 3a, 1a are provided in the center of the movable plate 3 and the front stand 1. are respectively formed and communicated with the stock solution supply port 7, and any of the stock solution supply pipes 3
Supply the stock solution from a or 1a.

Further, as shown in FIG. 16, the outer shape of the frame itself, that is, the outer shape of the plate 12, is gradually reduced from the front stand 1 toward the movable plate 3 on the rear stand 2 side, so that the excess area of the plate 12 is gradually reduced. It may be possible to make it smaller.

Furthermore, each board is not limited to being constructed only from a frame body, and may be a type of board that has an overboard that is recessed from the frame body inside the room. In this case, by gradually increasing the clamping area of the plate frame or by gradually decreasing the outer shape of the frame, the area of the overbed is gradually decreased to reduce the overarea.

Effects of the Invention According to the above configuration, since all the plates have the same thickness in the front-rear direction, the plates can be fed uniformly. Furthermore, in the present invention, by varying the overarea of the plates in the order in which they are arranged, it is possible to adjust how pushing pressure is applied from one side.
Further, although unpredictable indoor pressure is generated in a plate made of ordinary plates, since the plate of the present invention is made up of chambers, the generation of such indoor pressure can be effectively prevented. In addition, as the stock solution is initially supplied from the chamber to the stand side, for example, from the front stand or the rear stand to the rear stand or front stand, or from the stock solution supply plate to the front and rear stands, the excess area of the plate Since it was formed so that it gradually became smaller,
Even if the stock solution supply pressure decreases due to flow resistance during supply of the stock solution, the area of the chamber becomes smaller and the stock solution supply pressure increases, thereby compensating for the drop in the stock solution supply pressure. Therefore, there is no drop in the stock solution supply pressure, the stock solution supply pressures supplied to each chamber are approximately equalized, and even the chambers farthest from the chamber where the stock solution was initially supplied can be sufficiently filled with the stock solution. This improves overefficiency. Furthermore, since the stock solution supply pressure is approximately uniform in each chamber, the moisture content of the cake in each chamber can be made uniform. In addition, even if the stock solution cannot flow smoothly from one chamber to another, a flow gradient can be created by reducing the above-mentioned oversurface area, and the above-mentioned stock solution can be easily and reliably transferred to each chamber. Can be filled.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a filter press according to an embodiment of the present invention, Figs. 2 to 8 are front views of the filter press of Fig. 1 in which the cloth and plate are combined, and Fig. 9. 10 is a partially cutaway side view of a main part of the filter press according to still another embodiment, FIGS. 10 to 15 are a front view of the filter press according to FIG. 9 in a state where the plate and cloth are combined, and FIG. The figure is a partially cutaway side view of a filter press according to yet another embodiment. 1... Front stand, 1a... Stock solution supply pipe, 1b
...Liquid recovery pipe, 2...Rear stand, 3...Movable plate, 3a...Standard solution supply pipe, 3b...Liquid recovery pipe,
4... Side beam, 5, 51, 52, 53, 5
4, 55, 56, 11... Cloth, 5a... Stock solution supply communication port, 6, 61, 62, 63, 64, 6
5, 66, 67, 8, 81, 82, 83, 84,
85, 86, 12...Plate, 6a...Ear part, 6b
...Liquid recovery port, 6c...Communication hole, 6d...Handle, 6e...Space, 6f...Communication port for stock solution supply,
6g...Opening, 6h...Frame, 6i...Protrusion,
6j... Inclined surface, 7... Stock solution supply port, 9, 91,
92... Chamber, 10... Drive device.

Claims (1)

[Claims] 1. A plurality of numbers 6, 8,
12 are arranged so as to be freely movable back and forth, and a pair of cloths 5, 11 are arranged between each of the plates 6, 8, 12 so that a chamber 9 can be formed between the pair of cloths 5, 11, and each cloth 5 , 11 is formed, and as the movable plate 3 moves forward, all the plates 6, 8, 12 are tightened toward the front stand side, and the space between the adjacent plates 6, 8, 12 is formed. A chamber 9 is formed between the two cloths 5, 11 by sandwiching the cloths 5, 11, and the stock solution is transferred to the chamber 9 adjacent to any one of the plates 6, 8, 12 or the front stand. 1 or in a filter press in which the stock solution is supplied into a chamber 9 adjacent to the movable plate 3, and thereafter sequentially supplied to the chamber 9 adjacent to the chamber 9, the thickness dimension of all the plates in the longitudinal direction is are the same, and each board consists of a frame 6h,
A filter press characterized in that the size of the chamber 9 is configured to gradually decrease in size from the chamber 9 where the stock solution is initially supplied toward the stand side. 2. The plates 6, 8 have a constant outer shape, and the tightening area of the frame 6h gradually increases from the plates 6, 8 adjacent to the chamber 9 where the stock solution was first supplied toward the stand side. The filter press according to claim 1, wherein the filter press increases in size and the overarea surrounded by the frame body 6h gradually decreases. 3 The outer size of the frame 6h of the plate 12 gradually becomes smaller as it goes toward the stand from the plates 6 and 8 adjacent to the chamber 9 where the stock solution was first supplied, and The filter press according to claim 1, wherein the enclosed overarea gradually becomes smaller.