JPH0445808A - Filter - Google Patents

Abstract

PURPOSE:To compress the cake in the filter cloth between electrode plates with no need for a rubber sheet and to hold the electrode plate at a specified position at all times by hanging each electrode plate in a frame by an energizing means movably in the thickness direction of the frame. CONSTITUTION:An electrode plate 4 is supported in each of the plural frames 1 movably in the thickness direction of the frame. The energizing means 2 and 5 are used to connect the electrode 4 and frame 1, and the electrode plate 4 of one frame 1 of the adjacent frames is energized in the direction approaching the electrode plate 4 of the other frame 1. A couple of filter cloths 18 are arranged between the adjacent frames 1 and between the opposed electrode plates 4. The frames 1 are closed to one another, a raw liq. is supplied into the filtration chamber formed between a couple of filter cloths 18 and filtered, and a current is applied between the opposed electrode plates 4. As a result, the cake in the filter cloth between the electrode plates can be compressed with no need for a rubber sheet, and the electrode plate is always held at a specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for supplying a stock solution into a filter chamber between electrode plates or a filter chamber between a pair of filter cloths arranged between electrode plates, and supplying an electric current between the electrode plates. The present invention relates to a filtration device that performs filtration.

BACKGROUND OF THE INVENTION Hitherto, filter devices of this type are known with various structures. For example, as shown in FIG. 10, rubber sheets 30 and 30 are installed on the front and back sides of the filter plate 31, and electrode plates 34 and electrode plate support plates 33 are placed and connected on the front and back sides of each rubber sheet 30, respectively. On the side 3535 - electromotive electrode plate 34 and support plate 3
3 is fixed to the rubber sheet 30, and the adjacent filter plate 31 is fixed to the rubber sheet 30.
In JI, a pair of filter cloths 48, 48 are arranged between opposing electrode plates 34, 34, and the filter plates 3131 are tightened while supplying the stock solution between the filter cloths 48, 48, and the electrodes 34, 34. There is one in which filtration is performed by applying electricity between the plates 34 and 34. - By energizing the
Moisture in the stock solution moves to the outside of the room due to electroosmosis,
Dehydration or accelerated. During filtration, the rubber tube 30 expands due to the supply of compressed air and separates from the filter plate 31, so that the pair of electrode plates 34, 34 approaches each other according to the amount of dehydration of the stock solution, that is, the pair of filter cloths 48 I try to squeeze the cake within .48.

Problems to be Solved by the Invention However, with the structure described above, the rubber sheet may gradually deform due to expansion and lose its shape.
In such a case, there is a problem that it becomes difficult to hold the electrode plate in a predetermined position relative to the rubber sheet.

Therefore, an object of the present invention is to solve the above problem, and is capable of squeezing out the cake in the filter cloth between the electrode plates without using rubber bands, and making it possible to always hold the electrode plates in a predetermined position. Our goal is to provide a filtration device that can.

Means for Solving the Problems In order to achieve the above object, the present invention provides a frame with the following features:
The opposing electrode plates are suspended and supported by biasing means so as to approach each other. That is, a plurality of frames, an electrode plate supported by each frame so as to be movable in the thickness direction of the frames, and one frame of a pair of adjacent frames that connects the electrode plates and the frames. a biasing means for biasing each of the electrode plates in a direction in which the electrode plates of the body approach the electrode plates of the other opposing frame; and a pair of filter cloths, and with the frame bodies mutually closed, filtration is performed by supplying the stock solution into the filter chamber formed between the pair of filter cloths. The configuration is such that current is applied between the electrode plates.

Further, according to the present invention, a plurality of frames, an electrode plate supported by each frame so as to be movable in the thickness direction of the frames, and a pair of adjacent frames are connected. a biasing means for urging each electrode plate in a direction in which the electrode plate of one frame approaches the electrode plate of the other frame body; In the closed state, the stock solution is supplied into the filter chamber formed between the pair of electrode plates to perform filtration, and at the same time, electricity is applied between the pair of electrode plates.

In the above configuration, the current means includes a band-shaped member connecting the electrode plate and the frame body, and a pair of adjacent frame bodies, at which the electrode plate of one frame body faces the other frame body. Place the strip-like member (1) in the direction approaching the electrode plate of the frame
It is also possible to configure it so that it is equipped with one group of insurgents.

Furthermore, in the configuration described in -1-, the electrode plate is supported by the frame by an electrode plate support plate cage, and the electrode plate support member and the frame are connected by the band-shaped member. You can also configure the L sea urchin configuration.

Functions and Effects of the Invention In the above configuration, in a pair of adjacent frames -
The electrode plate of one frame approaches the electrode plate of the other opposing frame while being biased and supported, and The stock solution is supplied (Jξ At the same time, filtration was carried out by applying electricity between the electrode plates for 1a above.Therefore, without providing a rubber sheet, each 1a
Since the 11-electrode plate can be suspended and supported within the frame by the biasing means so as to be movable in the thickness direction of the frame, the electrode plate can be held at a predetermined position at all times.

That is, it is possible to effectively prevent the rubber sheet from deforming and changing the position of the electrode plate. Moreover, if each electrode plate is moved by the above-mentioned biasing means in accordance with the amount of liquid component of the stock solution discharged from the filtration chamber as a filtrate,
Each electrode plate can be kept in constant contact with the liquid component of the stock solution in the filter chamber, and can reliably maintain an energized state with respect to the stock solution in the filter chamber.

K Polarity Examples according to the present invention will be described in detail below with reference to FIGS. 1 to 9.

As shown in FIG. 1, the filtration device according to the present embodiment has a plurality of frames 1 arranged between rear stands 28 and 29 so as to be movable back and forth. A pair of side electrode plates 4.4 are supported by a strip member 2゜2:p+j'), and a pair of filter cloths 6, 6 are sandwiched between the electrode plates 4.4 of the adjacent frame 11. A filter chamber 7 is formed between both filter cloths 6, 6 to roughly constitute the structure.

This filtration device includes each adjacent electrode plate 4.
With the pair of cloths 6.6 sandwiched between the frames 1.4, the movable plate IO is advanced toward the main plate 12 side, and the frame body 1.4 is moved forward. After the undiluted solution is pressurized into each AT chamber 7 and the filtration and compression dehydration have progressed to some extent, -1- the above-mentioned Opposing electrode plates 4.
By applying a DC voltage to the electrode plate 4.4, the liquid or solid component in the stock solution moves to the cathode electrode plate side of the electrode plate 4.4, and the solid or liquid component in the stock solution moves to the anode electrode plate side. Among the liquid components, the filtrate that has passed through the filter cloth 6 is collected in a filtrate recovery path and discharged outside the machine, while the solid component, that is, the cake, remains in the filter chamber 7. This is what we do.

In Fig. 1.2, 8.8 is a guide rail installed on both sides of the front and rear frames 2829, and 99 is a guide rail 8.8 provided protruding from both sides of each frame l. 10 is a movable plate that moves back and forth along the guide rail by driving the drive device 11.
The movable plate 10 moves back and forth by the drive of the frame body 1. ...,
Move the kiterail 8.8〆f) back and forth, and
2, frame 1.・Closing or opening the mold of ■.

The pair of filter cloths 6.6 are suspended between the adjacent frames 1.1 by a well-known suspension mechanism (not shown).

Then, a filter chamber 7 surrounded by a pair of filter cloths 6, 6 is formed between the electrode plates 4.4 in the frames 1, 1, and the stock solution is supplied into the filter chamber 7, and the supply pressure is applied to the filter chamber 7. Filter the liquid components in the stock solution. The cake is I for the filter 6 above! ! The through hole 4 of the electrode plate 4 is intended to prevent the liquid from flowing into the liquid side.
a,..., 4a, ``1 is to prevent clogging.

- As shown in FIG. 2, the metering frame 1 has an inclined surface 1b formed on the inside of the front and rear surfaces of a rectangular frame portion 1a, and a horizontal slope at each corner of the frame portion 1a. Ears 1 protruding from
e, . A communication path 1g is connected to the filtrate recovery path.

- A stock solution supply port 15 is formed at the center of the lower end of the frame portion 1a, which protrudes downward 11, and a scratch cloth retaining ring 16 is fitted around it to supply the stock solution.
The heavy cloth 18 is being positioned. Inside the frame 1a,
A pair of electrode plate support plates 4.4 each have four strip members 2.4 movably in the thickness direction of the frame.・It is suspended and supported by 2. Each strip member 2 is made of rigid nylon or thin steel, and one end thereof is fixed to the end surface of the biped support plate 3. On the other hand, the other end of each strip member 2 has a through hole IC in the end face of the frame body 1 marked with -.
(7, and in the three directions or downward direction to the end surface of the frame)
, is inserted into the upright cylindrical portion 6, and is further passed through the spring 5 in the cylindrical portion 6, and is stopped by the r-shaped locking portion 2a. On the inside of the frame of the notebook through-hole 1c, there is a notch 1 that is slanted toward the center in the direction of M'K.
(1), and the band-shaped part (1.) can be inserted into the above-mentioned notch. Therefore, the four band-shaped members 2
．．・, 2 is the spring 5. By the biasing force of 5, the two-capacity support plates 3 are moved to the position farthest from each other, in other words, the electrode plate 4 supported by the support plate 3 is moved to the position closest to the opposing electrode plate 4, When the electrode plate 4 is suspended and supported within the frame 1 and moves in the thickness direction of the frame together with the support plate 3, the strip member 2 enters the notch 1d, while the spring 5. . . , 5 applies a biasing force that returns the support plate 3 to its initial position within the frame l when the band members 2 . . . , 5 contract. . . , 2 continues to be applied to the support plate 3. This 1'' force acts on the cake within the base 7 as a type of squeezing force, as will be described later.

As shown in FIG. 1.2, each of the electrode plates 4 is electrically connected to a conductive wire 4 inserted into the frame from one end surface of the frame 14 through the support plate 3. has been done. Each electrode plate 4 is a kind of conductive filter material having a large number of through holes 4a, . There is.

Further, the electrode plate support plate 3 described in 1. has a large number of rectangular recesses 3a, . Support with mounting means. Each of the four parts 3a is located behind the through hole 4a of the electrode plate 4, so that the filtrate that has passed through the through hole 4a of the electrode plate 4 falls downward through the recess 3a. Although this support plate 3 is slightly larger than the electrode plate 4, a certain gap 17 is formed between it and the inner surface of the frame portion 1a of the frame body 1.

According to the above configuration, as shown in FIG. 1, the movable plate 10 is moved toward the main plate 12 by driving the drive device 11,
With the pair of filter cloths 6, 6 sandwiched between the frames 1.1, the frames 1, . A birthing chamber 7 surrounded by filter cloths 6, 6 is formed between the frame l1, and the stock solution is pressurized into the sex box 7 from the stock solution supply hole I5.

At this time, as shown in FIG. 4.6, due to the stock solution supply pressure, the electrode plates 4 of each frame 1 are moved together with the electrode plate support plate 3 by the spring 5. . . , move integrally inward in the thickness direction of the frame 1 against the urging force of 5, that is, in the direction of expanding the birth chamber 7. However, each electrode plate 4 has a spring 5.・
・The biasing force of 5 is applied to the belt-shaped member 2. . . , 2, the force that squeezes the cake in the sexual group 7 is always acting, and the squeeze filtration of the stock solution is delayed. Furthermore, when dehydration occurs within the functional group 7, the electrode plate 4.1 is moved to the spring 5.4 depending on the amount of dehydration. ..., moves in the direction of narrowing the birth chamber 7 by the biasing horns 5. That is, the pressure drop in the delivery chamber due to the stock solution supply pressure and filtrate discharge, and the above spring 5. ..., filtration proceeds while maintaining a balance with the urging force of 5. The stock solution may be supplied all at once, or may be supplied intermittently. When supplying the undiluted solution into the birth chamber, the biasing force of the spring 55 is applied to the electrode plate 4 to prevent an air layer from forming inside the birth chamber.
．． 4, so that the electrode plate 4.4 is moved only by the stock solution supply pressure. The filtrate that has passed through the filter cloth 18 passes through the through hole 4a of the electrode plate 4 and the recess 3a of the support plate 3, and is collected on the inner surface of the frame 1, and thereafter is collected in the filtrate collection path as described in 1. In such a filtration state, a DC voltage is applied to the opposing electrode plates 4.4 in the adjacent frame 1I to cause an electrophoresis phenomenon and separate the liquid component and fixed component in the stock solution. Perform electroosmotic dehydration. When the electroosmotic dehydration is completed, the movable plate 10 is moved backward by the drive device 11 to move the frame 1. ..., open 1. ” - After the foot rotating plate 10 has retreated, the cake, which is a solid component in the stock solution remaining between the pair of filter cloths 6.6, is removed from each filter cloth 6, and each filter cloth 6 is washed, etc. The movable plate 10 is moved forward again by the driving device 11 to close the frames 1, .

According to the above embodiment, each electrode plate 4 is provided with a strip member 2. without providing a rubber sheet. . . , spring 5 through 2.・
The electrode plate 4 is suspended and supported within the frame 1 while applying a biasing force of 5, and the electrode plate 4 is adjusted to the thickness of the frame according to the stock solution supply pressure in the filtration chamber 7 and the amount of dehydration of the stock solution in the filtration chamber 7. Since it is movable in the direction, each electrode plate 4 can be held at a predetermined position at all times. It is possible to effectively prevent the position of the electrode plate from being changed due to deformation of the jumper, rubber neck, and toe. Also, note in -! In the heating device, each electrode plate 4 is moved to actively squeeze the undiluted solution in the birthing chamber, and each electrode plate 4 is moved so as to actively squeeze the undiluted solution in the birth chamber. It is also possible to move the plate 4 by the biasing force of the spring 55 so as to follow the plate 4.

This 3F-, sea urchin, connect each electrode plate 4 with a spring 5.・By being moved by force, each electrode plate 4 is constantly in contact with the liquid component of the stock solution in the birthing chamber, and can be used as a continuous IJ filter, ensuring that the stock solution in the birthing chamber is energized. Can you hold it?

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in various other embodiments. For example, the -]- note-recording band member 2 is not limited to one in which the 1'-shaped locking part 2a is integrally formed at the end thereof, and the end of the band member 2 is fixed in a T-shape or a disk shape. The spring 5 can be attached to the spring 5 in various known ways, such as by connecting it to a member. Further, if the above-mentioned band-shaped portion 2 is made to have elasticity, the spring 5 can be made unnecessary. Furthermore, instead of the spring 5, a hydraulic cylinder or air pulling may be used to achieve the same effect. Further, although the band-shaped member 2 is suspended and supported from the support plate 3 in the vertical direction, it is not limited to this direction, and may be suspended and supported from the left and right or from any direction. Also, depending on the properties of the stock solution, the filter cloth 18
, 1.8 are eliminated, and the base 7 is composed only of the electrode plates 4, 4, and the undiluted solution is prevented from directly entering the filtrate recovery path between the periphery of each electrode plate 4 and the inner surface of the frame 1. In addition, the stock solution supply port 15 may be provided not only at the lower end of the frame 1 but also at the upper end of the frame, or an auxiliary filter cloth or the like may be provided for the frame 1. 4 and the support plate 3 and installed in the center part.

Furthermore, other modified examples are shown in FIGS. 7-9.

In FIG. 7, gap holding members 24. , 24 may be installed so that the support plates 3, 3 are in close contact with each other, thereby effectively preventing movement of the support plate 3 in the frame thickness direction. In addition, as shown in FIG. 8, ]5 the support plate 3 is omitted and the electrode plate 4 is made of a rigid body, and only the electrode plate 4 is cut into the frame 1 and is movably suspended and supported. A gap holding member 2526 similar to that described above may be installed on the opposite surface of the electrode plate 4, such as the base 7. The gap holding portions 4425.26 are made of two types having different vertical areas. In addition, as shown in FIG. 9, instead of the band-shaped member 2, a plate spring 20 is curved into a U-shape and a connecting means 22. . . , 22 may be attached to the pair of support plates 3.3, and the support plate 3.3 may be supported movably in the thickness direction of the frame body. The upper end of this leaf spring 20 is supported by a bracket 21, and the bracket 21 is movably supported within the four parts 1 within the frame portion 1a of the frame body. Therefore, due to the supply pressure of the stock solution, the electrode plate 4 and the support plate 3 are moved toward the center in the thickness direction of the frame against the biasing force of the plate spring 20. The biasing force of the leaf spring 20 can be applied to the stock solution in the filter chamber 7 as a squeezing force. If the electrode plate 4 is supported within the frame 1 in this way, there is no need to provide the cylindrical portion 6 outside the frame 1, and the sealing performance can be further improved.

Furthermore, in this specification, the term "frame body" is not limited to one consisting only of a frame, but also includes one in which a thin plate-shaped portion is fixed between the support plates 3.3.

[Brief explanation of drawings]

Fig. 1 is a side view of the entire filtration device according to an embodiment of the present invention, Fig. 2 is a front view of one a-filtration unit in which an electrode plate, an electrode plate support plate f plate, a frame body, etc. are combined; Figure 4 is a cross-sectional side view taken along the +1. A cross-sectional plan view taken along the line ■-■ in FIG. 2 in the state and stock solution supply state, and FIGS. 7 to 9 are cross-sectional side views of essential parts of a filtration unit according to a modification of the present invention.
FIG. 10 is a sectional side view of a main part of a conventional filtration unit. 1. Frame body, 2. Band-shaped member, 3. Electrode plate support plate,
3a, recess, 4-[electrode plate, 4a, through hole, 5 coil spring, 6, cylindrical part, 7, base, butt, zyte beam, 9, handle, 10, movable plate, 11 ... Drive device, 12.13 ・Front and rear frames, 14 ... Conductive wire, 15 Stock solution supply port, 16 ... Filter cloth retaining ring, 17.
... Gap, 18... Filter cloth, 20... Leaf spring, 21.
・Bracket, 24.25.26... protrusion. Patent applicant: Kurita Kikai Seisakusho Co., Ltd. Representative: Patent attorney: Mr. Maeda and 2 others ~ To＼r

Claims (4)

[Claims] (1) A plurality of frames (1), an electrode plate (4) supported by each frame (1) so as to be movable in the thickness direction of the frame, and the electrode plate (4) and the frame (1). ), and in a pair of adjacent frames (1), the direction in which the electrode plate (4) of one frame (1) approaches the electrode plate (4) of the opposing frame (1) biasing means (2, 5, 20) for biasing each of the electrode plates (4); and a pair of filters disposed between the adjacent frame bodies (1) and between the opposing electrode plates (4). Cloth (18
), with the frame body (1) mutually closed, filtration is performed by supplying the stock solution into the filter chamber formed between the pair of filter cloths (18), and the opposing electrode plates ( 4) A filtration device characterized in that electricity is applied between the two. (2) A plurality of frames (1), an electrode plate (4) supported movably in the frame thickness direction by each frame (1), and the electrode plate (4) and the frame (1). ), and in a pair of adjacent frames (1), the direction in which the electrode plate (4) of one frame (1) approaches the electrode plate (4) of the opposing frame (1) and biasing means (2, 5, 20) for biasing each of the electrode plates (4), and the frame body (1) is closed between the pair of electrode plates (4). A filtration device characterized in that a stock solution is supplied into the formed filtration chamber to perform filtration, and at the same time electricity is supplied between the opposing electrode plates (4). (3) The biasing means (2, 5) connects the strip member (2) connecting the electrode plate (4) and the frame body (1), and one of the adjacent frame bodies (1). The electrode plate (4) of the other frame (1) opposite to the electrode plate (4) of the frame (1)
The filtration device according to claim 1 or 2, further comprising a biasing member (5) that biases the strip member (2) in a direction toward which the strip member (2) approaches. (4) The electrode plate (4) is supported by the frame (1) by the electrode plate support member (3), and the electrode plate support member (3)
The filtration device according to any one of claims 1 to 3, wherein the belt-like member (2) connects the frame body (1) and the belt-like member (2).