JP2516433Y2 - Filtration equipment for filter press - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a filter device provided between filter plates in a filter press.

[0002]

2. Description of the Related Art Conventionally, it has been well known that a filter cloth is used as a filter medium for a filter device provided between filter plates of a filter press, and a metal filter medium such as a wire mesh is used instead of the filter cloth. Has been. The idea of Jitsuko Sho-23-23688 is
It is an example of a metal filter medium.

[0003]

However, in the case of using the filter cloth as the filter medium, it is difficult to remove the cake adhering when the cake is discharged. Therefore, the filter cloth is vibrated,
Although it is washed with high-pressure fluid, it is not possible to completely remove the filter cloth from the eyes. Further, even if a metal filter medium having a good peeling property for the cake is used, it is difficult to remove the cake clogged with the cake, and if the filter medium is fixed as in Japanese Utility Model Publication No. 38-23688, complete peeling cannot be achieved.

[0004]

This invention solves the above-mentioned problems by utilizing the good releasability and elasticity of a metal filter medium. The gist of the invention is the horizontal shape. In a filter press in which a large number of filter plates are juxtaposed on a guide rail provided on the filter plate and a filter chamber is formed between the filter plates, the filter plate has a recess along the concave filter bed provided on the filter plate and has elasticity. Forming a filter mesh made of a metal material, and fixing the periphery of this filter mesh to the circumference of the filter plate, and at the back of the filter mesh attached to this filter plate On the other hand, a pressing plate that is biased to press outward is provided.

[0005]

[Operation] The device according to the present invention is configured as described above, and when the filter plate is closed, the filter nets fixed to the left and right filter plates press each other to form a recess in the filter plate. It is possible to form a filtration chamber that is housed and whose peripheral portion is sealed by the sealing surface of the filter plate, and filter the stock solution supplied to this filtration chamber.

Next, in order to discharge the cake resulting from the filtration operation as described above, when the filter plate is opened, the filter mesh is extruded by the pressing plate to the outside of the filter plate, and its elasticity causes the outside to move. It deforms to be convex. Therefore, the cake is extruded from the concave portion of the filter net, and the cake S is peeled off. Further, when the filter mesh is deformed, the mesh of the filter mesh on the side where the cake adheres is opened, and even the cake S clogged with the mesh can be peeled and removed.

After peeling the cake in this way,
By closing the filter plate, the filter mesh that was deformed in a convex shape outward of the filter plate was stored in the recess of the filter plate by pressing the left and right ones against each other, and at the same time, the peripheral part of the filter mesh was filtered. It is held and sealed by the sealing surface of the plate, and the filtration chamber of the filtering net of the left and right filter plates can be configured to prepare for the next filtration operation. Hereinafter, the invention will be specifically described with reference to the drawings.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a longitudinal section of a pair of filter plates taken out of filter plates juxtaposed on a guide rail of a filter press, and shows a vertical cross section. The filter bed 1b is formed in a concave shape while leaving the peripheral sealing surface 1a, and is configured in a disk shape. Further, reference numeral 1c is a liquid supply passage, 1d is a raw liquid supply passage to the filtration chamber 1e, 1f is a filtrate take-out passage, and 1g is a filtrate discharge passage.

Next, reference numeral 2 is a filter net made of a metal material formed in a concave shape along the concave portion of the filter plate, which has a circular shape, and the peripheral portion thereof is the peripheral portion of the filter plate gap 1. It is fixed. Reference numeral 2a is the press plate. Although not shown, the filter bed 1b of the filter plate 1 is provided with a large number of small projections, and a flow-down passage for the filtrate is formed between these projections.

Next, in FIG. 1, reference numeral 3 is a repulsion plate provided at the center of the concave portion of the filter plate 1, and a spring 4 is provided behind it so that the filter net 2 separates from the filter plate 1. Are pressing like. (See Fig. 2) In the example shown in the figure,
The filter net 2 has a circular shape and rigidity is added,
The central concave portion is flipped to the left and right in the figure with the peripheral mounting portion as a boundary. (See Figures 1 and 2)

In the filtering device thus constructed, the filter plate 1
When the plate is closed, the filter nets 2 provided on the filter plates are pressed against each other to form a filter chamber 1e between the filter plates as shown in FIG. Therefore, when the undiluted solution is supplied to the filtration chamber 1e through the liquid supply path 1c and the supply path 1d, it is filtered by the filtration net 2, and the filtrate is taken out of the machine through the take-out path 1f and the discharge path 1g.

Next, after the filtration is completed as described above, when the filter plate 1 is opened as shown in FIG. 2, the filter net 2 is pushed by the repulsion plate 3 from the rear side (filter plate side) and inverted. To do. By this inversion, the cake adhering to the filter net 2 peels off and falls. That is, the filter net 2 vibrates due to the reversal, and the mesh of the filter net 2 on the side where the cake adheres is opened, so that even the cake that is clogged is peeled off. At this time, if the filter net 2 is formed in a circular shape and added with elasticity, it is easy to turn over, and peeling is good and effective due to the impact at the time of turning.

After the cake peeling is completed as described above, by closing the filter plate 1, the filter nets 2 which have been inverted outwardly in a convex shape are mutually separated. By pressing each other, as shown in FIG. 1, it can be inverted inwardly (on the side of the filter plate) to form a filtration chamber 1e, which can be prepared for the next filtration operation.

[0014]

[Effects of the Invention] As is apparent from the above description, the present invention uses a filter net made of a metal material that allows the cake to be easily peeled off. Expand the mesh of the filter mesh attached to the cake,
It was designed to enable complete cake peeling, and could solve the biggest problem in using a filter press.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a filtration device according to the present invention.

FIG. 2 is a vertical sectional side view showing an operating state of the filtration device according to the present invention.

FIG. 3 is a front view showing a part of the filtering device according to the present invention.

[Explanation of symbols]

 1 Filter plate 1b Filter bed 2 Filter net 3 Repulsion plate

Claims (1)

(57) [Scope of utility model registration request] 1. A filter press in which a large number of filter plates are arranged in parallel on a horizontally provided guide rail and a filter chamber is formed between the filter plates, and a concave filter bed 1b provided on the filter plate 1 is provided.
A filter mesh 2 made of a metal filter medium having a concave portion along with and having elasticity is formed, and the peripheral portion of the filter mesh 2 is fixed to the peripheral portion of the filter plate 1 and attached to the filter plate 1. A filter device in a filter press, in which a repulsion plate 3 is provided on the back surface of the filter net 2 so as to normally push the filter net 2 outward against the filter plate.