JPH0256927B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a filter press that performs filtration by supplying a stock solution into a chamber between a pair of cloths sandwiched between adjacent plates when the plates are closed.

2. Description of the Related Art Conventionally, filter presses of this type with various structures are generally known. One typical example is to arrange a large number of boards with overboard fixed integrally to the frame body between the front and rear stands, and to arrange a pair of cloth between the adjacent boards, and to A stock solution supply port is formed through the center of the cloth, and a stock solution supply port is formed at a position corresponding to the stock solution supply port of each cloth. After the plates are tightened, there is one in which the stock solution is supplied into the chamber between the pair of cloths from the stock solution supply port of the plate and the stock solution supply port of the cloth to carry out filtration.

Problems to be Solved by the Invention However, in the structure described above, since there is only one stock solution supply port on the overbed of the plate and only one stock solution supply port on each cloth, the overpressure is highest in the area surrounding the stock solution supply port of the cloth. The concentration increases, and the cake builds up in the area around the stock solution supply port, causing the stock solution supply port to become smaller and the stock solution supply pressure to drop, allowing the stock solution to be smoothly supplied to the chamber located on the opposite side from the stock solution supply side. There was a problem where I was told that I couldn't do it.

Therefore, the inventor of the present invention has proposed that by providing multiple stock solution supply ports, even if one stock solution supply port becomes small due to adhesion of cake, the stock solution can be supplied from the other stock solution supply port, thereby effectively solving the above problem. We have found that this can be solved.

However, when a plurality of stock solution supply ports are formed, it is necessary to change the position of the stock solution supply ports due to differences in the properties of the stock solution and overconditions such as overpressure. if,
If multiple stock solution supply ports were formed in the overbed of the conventional board mentioned above, it would be necessary to remove the entire board from between the front and rear stands each time the overboard conditions differ, which would cause the problem of extremely complicated removal work. arise.

Therefore, the inventor of the present invention made further efforts to construct the board from a frame body to eliminate excess floor space, and
It has been found that all of the above problems can be effectively solved by forming a plurality of stock solution supply ports on the cloth.

Therefore, an object of the present invention is to solve the various problems mentioned above, by making it possible to arbitrarily and easily adjust the number and position of the stock solution supply ports depending on the overconditions, and reducing the stock solution supply pressure. The object of the present invention is to provide a filter press that can effectively prevent this.

Means for Solving the Problems In order to achieve the above object, the present invention consists of each board consisting only of a frame body, and a plurality of cloths in the over part of each cloth corresponding to the over part of the frame body of each board. It was configured to form a stock solution supply port. That is,
A plurality of plates are arranged between the front and rear stands, and a pair of cloths is arranged replaceably between each plate. After the plates are tightened by a tightening device, the undiluted solution is poured into the chamber between the pair of cloths. Each of the plates is constituted by a frame body, and each of the cloths is configured to form a plurality of stock solution supply ports in a portion corresponding to a portion of the frame body of the plate. did.

Effects of the Invention In the above configuration, after the plurality of plates are tightened by a tightening device to one side of the stand, for example, the undiluted solution is supplied to each pair through the plurality of undiluted solution supply ports of each cloth located in the upper part of the frame of each plate. It is supplied into the chamber formed between the cloths and filtrated. When changing the number and arrangement of stock solution supply ports due to excessive conditions,
Replace each cloth with a cloth having a different number of stock solution supply ports or a cloth with a different arrangement of stock solution supply ports.

Embodiments Hereinafter, embodiments according to the present invention will be described in detail based on FIGS. 1 to 9.

As shown in FIGS. 1 and 2, the board according to this embodiment has side beams 4, 4 arranged on both sides between the front and rear stands 1, 2, and a board consisting only of a frame between the front and rear stands 1, 2. A large number of cloths 6 are arranged and suspended from the side beams 4, 4 so as to be freely forward and backward, and a pair of cloths 5, 5 are arranged between adjacent plates 6, 6.
The plates 6 of each cloth 5 are arranged so as to sandwich the
A plurality of stock solution supply ports 7, 7 are formed in a portion corresponding to the upper part of the frame body, and the movable plate 3 arranged behind the rearmost plate 6 is moved forward by a driving device (not shown) by a tightening device. By doing so, all the plates 6 are tightened toward the front stand, and the stock solution is supplied from the stock solution supply pipe 1a of the front stand 1 through the stock solution supply port 7 of each cloth 5 into the chamber 9 formed between each pair of cloths 5, 5. The system is configured to supply and perform overflow. 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 collection pipe formed at each side of the lower part of the movable plate 3. These are liquid recovery tubes formed respectively in .

Each of the plates 7 mentioned above consists of a frame. The frame is a member having a pentagonal horizontal cross-section and a vertical cross-section, and has inclined surfaces 6j on its inner surface that are inclined on both sides from the center in the thickness direction. A handle 6d is provided near the center of each outer surface of each frame 6,
The handle 6d is attached to the side beam 4 installed on each side between the front and rear stands 1 and 2 of the filter press.
are placed in a slidable manner to suspend and support the plate 6,
It guides the back and forth movement of each plate 6. 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 that communicates with the space 6e inside the plate 6
is formed on the ear portion 6a.

The cloths 5 are replaceably arranged before and after each plate 6 so that the inner space 6e of the plate 6 is sandwiched between the pair of cloths 5, 5. Replaceable support methods for each cloth 5 include a method of suspending it from the frame of the board 6 using a hook member such as a pin,
There are various methods known in the art, such as a method of suspending the cloth using a hanging support device placed above the board 6, a method of placing a large piece of cloth over the board 6 from above, and placing a pair of cloths 5, 5 in front and behind the board 6. method can be applied. In addition, in the portion corresponding to the excess portion of the frame inside the frame of each plate 6 of each cloth 5, stock solution supply ports 7 are formed in various numbers and at various positions as shown in FIGS. 2 to 7. do. That is, when six stock solution supply ports 7 are formed in the excess portion of the cloth 51, three stock solution supply ports 7, 7, 7 are formed in a row along the vertical direction from left to right in the figure, as shown in FIG. are arranged at equal intervals.
Each stock solution supply port 7 is formed by fitting eyelet fittings from both sides of the cloth 51 to form a circular through-hole to prevent the stock solution from entering between the cloths 51, 51.
In FIG. 3, the number of stock solution supply ports 7 on the cloth 52 is six, which is the same as above, but the stock solution supply ports 7, . It is placed slightly lower. In addition, when forming five stock solution supply ports 7 on the cloth 53, the fourth
As shown in the figure, they are arranged so as to be approximately evenly positioned with respect to the upper part of the cloth 53. When four stock solution supply ports 7 are formed on the cloth 54, they are arranged so as to be approximately equally positioned over the upper part of the cloth 54, as shown in FIG. When three stock solution supply ports 7 are formed on the cloth 55, as shown in FIG.
It is placed at a location corresponding to the apex of the inverted triangle so as to be approximately equally positioned with respect to the excess portion of 5. When forming two stock solution supply ports 7 on the cloth 56, the seventh
As shown in the figure, they are arranged at the center along the vertical direction so as to be approximately evenly positioned with respect to the upper part of the cloth 56. 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 of the frame, etc., but the stock solution supply ports 7 are placed evenly over the excess area of each cloth 5. There is no need to place it. The size of the stock solution supply port 7 may be, for example, about 3 to 30 mm, and is preferably as small as possible so as not to reduce the excess area. In FIG. 5, the two stock solution supply ports 7', 7' at the top right and bottom left of the figure are formed to have a larger diameter than the other stock solution supply ports 7, 7, respectively. In the figure, the upper stock solution supply port 7' is formed to have a larger diameter than the lower stock solution supply port 7.

In this way, cloths 5 with different numbers of stock solution supply ports 7 are used.
are placed between the front and rear stands 1 and 2. For example, for the three central plates 6, 6, 6 in Figure 1, 4
A pair of cloths 5 having a number of stock solution supply ports 7,..., 7
A pair of cloths 51, 51 having six stock solution supply ports 7, . . . , 7 shown in FIG. A pair of cloths 56, 56 having numbers 7, . . . , 7 are arranged.

According to the above 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, and then supply the undiluted solution from the undiluted solution supply pipe 1a of the front stand 1 to the undiluted solution supply ports 7, . . . , 7 of the pair of cloths 5, 5 in the front row.
The stock solution is supplied into the first chamber 9 formed by the rear cloth 5 of the pair of cloths 5, 5 in the front row and the front cloth 5 of the second pair of cloths 5, 5. When a certain amount of the stock solution is supplied to the first chamber 9, the stock solution is supplied into the second chamber 9 through the stock solution supply ports 7, . . . , 7 of the second pair of cloths 5, 5. In addition, when the position of the stock solution supply port 7 of the cloth 5 in the front row and the position of the stock solution supply port 7 of the second cloth 5 are continuous along the front-rear direction, the stock solution is the same as the stock solution of the cloth 5 in the front row. Immediately from the supply port 7, the stock solution passes through the stock solution supply port 7 of the second cloth 5 and is supplied into the second chamber 9. When the stock solution is supplied to this second chamber 9 to some extent, it passes through the stock solution supply ports 7, . . . , 7 of the third pair of cloths 5, 5 to the third
A stock solution is supplied to chamber 9. In this way, the stock solution is supplied in order from chamber 9 on the front stand side,
The final chamber 9 is supplied with the stock solution. And the first
The filling of the stock solution into the chamber 9 is completed, and then the filling of the stock solution into the second chamber 9 is completed, and so on, and the stock solution is filled in order from the chamber 9 on the front stand side. 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.
The liquid flows down the cloth 5 and is collected at the liquid collection 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, each plate 6 is composed of only the frame body, and the cloth 5 corresponding to the outer part of the frame body of the plate 6
A plurality of stock solution supply ports 7 are formed in the upper part of the board, and each cloth 5 is arranged so that it can be replaced, so that when changing the supply state of the stock solution depending on the properties of the stock solution and overconditions such as overpressure, the board 6 may be arranged between the front and rear stands 1 and 2, and only the cloth 5 may be replaced with a cloth 5 having a different number or position of the stock solution supply ports 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 in the upper part of the frame,
The stock solution and gas generated from the stock solution can easily enter and exit through each stock solution supply port 7, and the supply pressure of the stock solution supplied into the chamber 9 at the same time as the stock solution supply can be made uniform throughout the chamber. Therefore, even if the number of chambers increases, the difference in the stock solution supply pressure between the chamber 9 on the stock solution supply side and the chamber 9 on the opposite side to the stock solution supply side becomes small, and the stock solution supply pressure remains approximately constant in each chamber 9. Therefore, overpressure can be applied and overefficiency can be improved. In addition, conventionally, when a stock solution contains particles with large sedimentation properties, the stock solution tends to accumulate in the lower part of the chamber 9, and if only one stock solution supply port 7 is formed at the bottom, the stock solution supply port 7 will quickly become clogged. There were many. However, for such a stock solution, there are a plurality of stock solution supply ports 7,..., below the stock solution supply port 7.
7 and also has a plurality of stock solution supply ports 7, ..., 7 formed in the upper part, the stock solution supply ports 7, ..., 7 will be less likely to be clogged at the bottom, and the stock solution will reach the top of the chamber 9. In addition to being able to sufficiently fill the plate 6 with a plurality of stock solution supply ports 7, . In addition, since the board 6 is formed only from the frame without forming any overboard in the frame of the board 6, the board as a whole is much lighter than conventional ones that have an overboard in the frame of the board 6. Become something.

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 the chamber 9 from the stock solution supply port 7, and will not flow into the chamber 9. After the stock solution is filled to a predetermined amount, that is, to the position of 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 in sequence. In other words, when supplying the stock solution through one stock solution supply port 7 that is continuous along the front-rear direction as in the past, depending on the stock solution supply pressure, the stock solution may not necessarily be sufficiently supplied into the chamber 9 before the stock solution is supplied to the next chamber. The stock solution is supplied to the chambers 9, resulting in a mixture of chambers 9 that are sufficiently filled with the stock solution and chambers 9 that are not sufficiently filled with the stock solution, resulting in uneven supply and filling of the stock solution into each chamber 9. This resulted 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, or may be simultaneously supplied from both stock solution supply pipes 1a and 3a.

Further, as shown in FIGS. 8 and 9, for example, a plate 6 arranged in the center of the filter press (in FIG. 8,
61) to the front stand side and the movable plate side. 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 the protrusion 6i is formed with a communication port 6f for supplying stock solution that communicates in the front-rear direction,
In addition, a communication port 5a for stock solution supply is formed in each cloth 5 corresponding to the communication port 6f, and the protrusion 6i of the central plate 61 is connected to the inner space 6e of the plate 6 and the communication port 6f for stock solution supply. A communication opening 6g is formed to communicate with each other. For example, without supplying the stock solution from the stock solution supply pipe 1a of the front stand 1 through the stock solution supply communication port 6f into the chamber 9 between the plates 6, 6, the center plate is moved from the left side to the right side in FIG. 61
The stock solution is supplied into the chamber 91 on the left side of the plate 61 through the communication opening 6g in the plate 61. When the chamber 91 is filled with the stock solution, the stock solution is supplied to the next chamber 92 on the left side through the stock solution supply port 7. On the other hand, when the stock solution is supplied and filled into the chamber 93 on the right side of the plate 61 through the stock solution supply communication ports 5a and 6f of the cloth 5 and the plate 61 in the plate 61, the stock solution supply port is further provided in the chamber 9 on the right side. The stock solution is supplied through 7. In FIG. 8, 8 is fitted into the outer peripheral recess of the stock solution supply communication port 6f of the plate 6 adjacent to the center plate 61, and the periphery of the stock solution supply communication port 5a of the cloth 5 is fitted into the recess. This ring 8 is used to bring the cloth 5 and the plate 6 into close contact with each other, and prevents the undiluted solution from entering between the cloth 5 and the plate 6. The communication port 6f for supplying the stock solution may be provided by forming a protrusion on the lower part of the plate 6 to perform the same effect as described above, or the communication port 6f for supplying the stock solution may be provided at a position corresponding to the central portion of the plate portion of the cloth 5. An annular stock solution supply plate having an opening may be fixed and the same action as described above may be performed to feed the stock solution.

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 plate 6 also includes a so-called pressing plate, and if a through-hole for supplying the stock solution is formed in the pressing film of the pressing plate corresponding to the stock solution supply port 7 of the cloth 5, the pressing board can also have a main body. The invention can be fully applied.

Effects of the Invention According to the above configuration, each plate is composed of a frame body, a plurality of stock solution supply ports are formed in the excess portion of the cloth corresponding to the excess portion of the frame body of the plate, and each cloth can be replaced. Therefore, when changing the supply state of the concentrate depending on the properties of the concentrate and overconditions such as overpressure, the plates can be arranged between the front and rear stands and only the cloth can be replaced with a cloth with a different number or position of the concentrate supply port. You can replace it with . Therefore, the number and position of the stock solution supply ports can be easily adjusted, and a drop in the stock solution supply pressure can be effectively prevented, and overefficiency can be improved. In other words, in the conventional board, the overbed was integrally fixed to the overpart of the frame, so even if multiple stock solution supply ports were formed in the overbed, the entire board had to be replaced. The work was extremely complicated. In addition, since multiple stock solution supply ports are formed in the upper part of the frame, the stock solution and the gas generated from the stock solution can easily enter and exit through each stock solution supply port, and at the same time the stock solution is supplied, it can be indoors. It is possible to equalize the supply pressure of the stock solution supplied to the
Overefficiency is further improved. Therefore, even if the number of chambers increases, the difference in the stock solution supply pressure between the chamber on the stock solution supply side and the chamber on the opposite side to the stock solution supply side becomes smaller, and each chamber has a constant stock solution supply pressure and thus overpressure. can be applied, and the overefficiency can be further improved. In addition, since the board is constructed from a frame body and no excess floor is formed within the frame body, the weight of the board can be reduced, and there is no large difference in overpressure between the front and rear surfaces of the board over time. ,
The board will not be damaged. In other words, with conventional plates with overbeds, if there is a large difference in the overpressure acting between the two sides of the overbed, the overbed may try to deform with respect to the plate, causing damage to the overbed. be. Therefore, the present invention can fully achieve its intended purpose.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a filter press according to an embodiment of the present invention, FIGS. 2 to 7 are front views of cloths according to various embodiments each having a plurality of stock solution supply ports, and FIG. 8 9 is a partial cross-sectional side view of the main part of the filter press according to still another embodiment of the above;
The figure is an exploded perspective view of the main parts of FIG. 8, the plate and the cloth. 1... Front stand, 1a... Stock solution supply pipe, 1b...
Liquid recovery pipe, 2...rear stand, 3...movable plate, 3a...
Stock solution supply pipe, 3b...Liquid recovery pipe, 4...Side beam, 5, 51, 52, 53, 54, 55, 56...
Cloth, 5a...Communication port for stock solution supply, 6...Plate, 6a
...Ear part, 6b...Liquid collection port, 6c...Communication hole, 6d
...Handle, 6e...Space, 6f...Communication port for supplying stock solution,
6g...Opening, 6i...Protrusion.

Claims (1)

[Claims] 1. A plurality of plates 6 are arranged between the front and rear stands 1 and 2, and a pair of cloths 5,
5 are arranged in a replaceable manner, and after the plate 6 is tightened by the tightening device 3, the undiluted solution is supplied into the chamber 9 between the pair of cloths 5, 5 to carry out filtration. Each of the plates 6 is composed of a frame body, and a plurality of stock solution supply ports 7 are formed in a portion of each cloth 5 that corresponds to a portion of the frame body of the plate 6. press. 2. According to claim 1, each stock solution supply port 7 of the pair of cloths 5, 5 arranged between the adjacent plates 6, 6 is arranged so as to be discontinuous with respect to the front-rear direction. filter press.