JP2510789Y2 - Filter press squeeze membrane and squeeze filter plate - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze film of a filter press used for squeeze filtration and a squeeze filter plate equipped with the squeeze film.

[0002]

2. Description of the Related Art Conventionally, a squeeze membrane of a filter press has irregularities formed on its surface so that filtrate can be smoothly collected by the irregularities or the flutes, and the back surface is made flat and the squeeze membrane is arranged. Form the surface of the substrate to be uneven,
There is a device in which the compressed fluid is easily supplied between the back surface of the compressed film and the front surface of the substrate.

[0003]

However, the structure described above has a problem in that since it is necessary to form irregularities on the substrate surface, the processing is complicated and expensive.

Therefore, an object of the present invention is to solve the above problems, in which it is not necessary to form irregularities on the surface of the substrate, and the fluid is smoothly supplied between the substrate surface and the back surface of the compressed film. It is to provide a squeezing membrane and a squeezing filter plate of a filter press that can be used.

[0005]

In order to achieve the above-mentioned object, the present invention provides unevenness on both the front surface that can contact the filter cloth and the back surface that can contact the substrate to form the back surface of the compressed film and the front surface of the substrate. And at least a space can be formed between them and the fluid enters the space so that the fluid can be smoothly supplied between the back surface of the compressed film and the front surface of the substrate. That is, in the compressed film of the present invention, both front and back surfaces are formed to have uneven surfaces. In the squeeze filter plate of the present invention, the surface of the substrate is covered with a squeeze film, and a space is formed between the uneven surface of the back surface of the squeeze film and the surface of the substrate. Configure so that both sides are covered.

[0006]

According to the structure of the present invention, since the uneven surface is formed not only on the surface of the squeeze film that can contact the filter cloth but also on the back surface of the squeeze film that can contact the substrate, the fluid for heating or cooling the slurry is formed. Alternatively, when the compressing fluid is first supplied between the substrate surface and the compressed film back surface, the fluid can be smoothly introduced into the space formed on the uneven surface between the substrate surface and the compressed film back surface. Thus, the fluid can be smoothly supplied to the entire back surface of the compressed film. Therefore, partial expansion of the compressed film can be effectively prevented. Even if the compressed film back surface and the substrate surface are in close contact with each other, a space is always formed between the uneven surface on the compressed film back surface and the substrate surface. The initial supply can be done smoothly,
The entire backside of the squeeze film can then be expanded against the front side of the substrate. Further, compared with the one in which the surface of the substrate is formed with irregularities and a space is provided between the substrate surface and the compressed membrane fluid,
In the present invention, since the unevenness is formed on the back surface of the compressed film, the substrate surface may be flat, and since it is not necessary to perform the uneven processing, it is cheaper than the method in which the unevenness is formed on the substrate surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment according to the present invention will be described below with reference to FIGS.
It will be described in detail based on.

As shown in FIG. 1, the squeeze film 1 of the filter press according to the present embodiment has uneven surfaces formed on both front and back surfaces. The squeezing film 1 is roughly composed of a quadrangular frame portion 1a that comes into contact with a quadrangular frame-shaped frame portion 2a of a substrate 2 of a squeezing filter plate 3 described later, and an inner portion 1b surrounded by the quadrangular frame portion 1a. On the surface of the inner portion 1b, first protrusions 1c, ..., 1c each having a substantially rectangular prism shape are regularly arranged in the vertical and horizontal directions in FIG. 1 and are integrally formed with the squeeze membrane main body.
The first convex portion 1c is for allowing the filtrate to flow smoothly on the surface of the compressed film. In the portion corresponding to the back surface of the inner portion 1b on the back surface of the squeeze film 1, second projections 1d, ..., 1d each having a substantially rectangular prism shape are regularly arranged in the vertical and horizontal directions in FIG. 1 and integrated with the squeeze film body. Has been formed.
The second convex portion 1d is for smoothly flowing the slurry heating or cooling fluid between the back surface of the compressed film and the front surface of the substrate.

In FIG. 2, the squeeze film 1 is arranged on both front and back surfaces of the substrate 2 to form one squeeze filter plate 3.
It is a cross-sectional side view in the state where three are arranged.

The substrate 2 has a rectangular frame-shaped frame portion 2a and the frame portion 2
It has a shape similar to that known as a filter plate for a single-type filter press, which is roughly composed of a concave portion 2b surrounded by a. To each substrate 2, a pair of upper end thin-walled protrusions that project upward from the substrate 2 of the pair of compressed films 1 and 1 that sandwich the substrate 2 in a state where the rectangular frame portion 1a of the compressed film 1 faces the frame portion 2a and face each other. The pair of squeeze membranes 1 and 1 are fixed to the substrate 2 by fastening the portions 1e and 1e and the connecting portions 1e and 1e having a lower end and projecting downward and facing each other with mounting bolts 4 ,. A pair of filter cloths 5 and 5 are arranged between the pressing filter plates 2 and 2, and a filter chamber 6 formed between the pair of filter cloths 5 and 5 when the filter plates are fastened.
The slurry is supplied to the inside for filtration.

A fluid such as a liquid heated or cooled at the time of filtration or compression filtration is supplied between the back surface of each compressed film 1 and each surface of the substrate 2 so as to face the surface of the compressed film 1 and the compressed film 1. The slurry held between the compressed film 1 and the surface of the compressed film 1 is heated or cooled. When performing squeeze filtration, the slurry heating or cooling fluid is supplied between the front surface of the substrate and the back surface of the squeeze film to the extent that the squeeze films 1 and 1 expand, as indicated by I in FIG. Alternatively, a compressing fluid such as compressed air may be supplied instead of the heating or cooling fluid.

According to the above construction, the filter plate is tightened to sandwich the square frame portions 1a and 1a of the pair of compressed membranes 1 and 1 between the frame portions 2a and 2a of the adjacent substrates 2 and 2, and the pair is further formed. The filter cloths 5 and 5 are sandwiched between the square frame portions 1a and 1a. Then, the slurry is supplied into the filter chamber 6 formed between the pair of filter cloths 5 and 5 to start the filtration. A fluid for heating or cooling the slurry is supplied to the space 7 formed between the front surface of the substrate and the back surface of the compressed film as needed to heat or cool the slurry. When performing squeeze filtration, the squeeze fluid is supplied to the space 7 between the back surface of the squeeze membrane and the front surface of the substrate to expand the squeeze membrane 1, and between the squeeze membranes 1, 1 and between the filter cloths 5, 5. Squeeze the sandwiched slurry.
After completion of the filtration, the pressing filter plates 3 and 3 are opened to collect the cake as is well known.

According to the above embodiment, not only the first convex portions 1c, ..., 1c are formed on the surface of the compressed film 1, but also the second convex portions 1d ,. Because I did
When the slurry heating or cooling fluid or the squeezing fluid is first supplied between the substrate surface and the squeezed film back surface, the fluid is smoothly introduced into the space formed on the uneven surface between the substrate surface and the squeezed film back surface. The fluid can be smoothly supplied to the entire back surface of the compressed film. Therefore, partial expansion of the compressed film 1 can be effectively prevented. Even if the compressed film back surface and the substrate surface are in close contact with each other, a space is always formed between the uneven surface on the compressed film back surface and the substrate surface. The initial feed can be done smoothly and then the entire backside of the squeeze membrane can be expanded towards the front side of the substrate. Further, in comparison with the conventional squeezing filter plate in which irregularities are formed on the surface of the substrate to provide a space between the substrate surface and the squeezed membrane fluid, in the present embodiment, the irregularities are formed on the back surface of the squeezed membrane, so that the substrate The surface may be flat, and since it is not necessary to process unevenness, the cost is lower than that of forming unevenness on the substrate surface.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example,
The method for forming the uneven surface on the compressed film 1 may be as follows. As in the compressed film 11 shown in FIG. 3 (A), the thin-walled connecting portions 11e at the upper and lower ends are formed at the center of the compressed film body.
By forming the above, any surface can be arranged on the front surface, and the concave portions 11a, ...
The a may be formed at the corresponding positions on the front and back. In addition, like the compressed film 12 shown in FIG.
The first recess 12a may be formed on the front surface, and the second recess 12b may be formed at a position different from that of the first recess 12a on the back surface that is flush with the thin connecting portion 12e. In addition, like the compression membrane 13 shown in FIG.
The convex portion 1 is formed on both sides of the compressed film without forming a thin connecting portion.
You may make it form 3a in the position corresponding to the front and back.
Further, like the compressed film 14 shown in FIG. 4B, the convex portions 14a are formed on both surfaces of the compressed film without forming a thin connecting portion.
May be formed at different positions on the front and back. Further, in the case where the compressed film can be attached to the front surface or the back surface of the substrate, the shape and the arrangement of the convex portion or the concave portion may be different between the front surface and the back surface of the compressed film, and the compressed film may be formed according to the slurry. The front side and the back side may be used separately.

[Brief description of drawings]

FIG. 1 is a front view of a squeezing membrane according to an embodiment of the present invention, showing a substrate on which the squeezing membrane is arranged in phantom lines.

2 is a cross-sectional side view of a squeezing filter plate including the squeezing membrane and the substrate shown in FIG. 1. FIG.

3 (A) and 3 (B) are partial cross-sectional side views of a compressed film according to a modified example.

4 (A) and 4 (B) are partial cross-sectional side views of a compressed film according to a modified example.

[Explanation of symbols]

1, 11, 12, 13, 14, ... Compressed film, 1a ... Square frame part, 1b ... Inner part, 1c ... First convex part, 1d ... Second convex part, 1
e, 11e, 12e ... connecting portion, 2 ... substrate, 2a ... frame portion, 2
b ... concave part, 3 ... squeezing filter plate, 4 ... mounting bolt, 5 ... filter cloth,
6 ... Filter chamber, 7 ... Space, 11a, 12a, 12b ... Recessed portion,
13a, 14a ... Convex portion.

Claims (2)

(57) [Scope of utility model registration request] 1. A squeeze film for a filter press, characterized in that both surfaces, a front surface that can come into contact with a filter cloth and a back surface that can come into contact with a substrate, are formed into uneven surfaces. 2. The surface of the substrate (2) is covered with the squeeze film (1) according to claim 1, and between the uneven surface of the back surface of the squeeze film (1) and the surface of the substrate (2). A squeezing filter plate of a filter press, characterized in that a space is formed in the slab.