JPH0257965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fabric structure in which only hollow frames are attached to filter presses arranged in parallel.

(Prior Art) Filter presses in which a large number of plates or plates and frames are arranged in parallel have been known for a long time in order to separate solids contained in a supplied stock solution and obtain a clear liquid. These filter presses include single-type filter presses in which only plates are arranged in parallel, each consisting of a core plate part that has an uneven surface inside a frame part on the periphery of the plate and is thinner than the thickness of the frame part, or a single filter press in which the above plate and a core part are arranged in parallel. Dual filter presses, in which frames with only picture frames and no plates are arranged alternately in parallel, have been widely used for a long time. All types of boards have a core plate, which makes the board heavy, so instead of the core plate, one or two wire mesh or thin iron plates have been installed, and in addition, the core plate part Alternatively, a filter press appeared that had only hollow frames without wire mesh arranged side by side. (Tokuko Showa 57-
(See Publication No. 58969).

On the other hand, the stock solution supply hole for supplying the stock solution to the filter press is of the corner feed type where the stock solution passes through the corner of the plate, the center feed type where the stock solution passes through the approximate center or upper center of the plate, or the hole provided on the outside of the surface. The bottom feed type, top feed type, side feed type, etc. are known.

(Problems to be Solved by the Invention) As mentioned above, various types of filter presses have been developed, but each has its own problems. If a board is provided with a core board or a wire mesh, the thickness of the frame part of the board must be increased in order to accommodate a certain amount of cake, which increases the weight accordingly. The above-mentioned special public service 1977-
The filter press described in Publication No. 58969 is light because only frames are arranged in parallel, but since it is a corner feed type and has overframes and water frames arranged alternately in parallel, the entire length of the filter press is shorter than the overframe. It becomes longer by that amount. Furthermore, since the center part of the cloth is folded so as to cover both the front and back sides of the overframe and is hung over the upper end of the overframe, there are holes for the stock solution or holes in the excess liquid that are drilled in the corners of the overframe and the water frame. There is a risk that the through hole and the stock solution hole or liquid passage hole provided in the cloth may be misaligned, making it difficult to attach the cloth.

The present inventors had doubts about the presence of a core plate, wire mesh, or stock solution supply hole provided in the plate in the conventional center feed filter press, and as a result of intensive research, they found that only a frame without a core plate was used. I know that even if I do it, I will achieve my purpose.
He invented a fabric structure for this new type of filter press.

(Means for Solving the Problems) This invention provides a method in which a solution hole is formed in the center or the periphery of two pieces of cloth, and the periphery of the solution hole is sewn to join the two pieces of cloth. This filter press cloth has a structure in which a cloth attaching means is provided on at least a portion of the corresponding peripheral edge of the cloth, so that frames consisting only of frame portions can be easily attached to filter presses arranged in parallel.

The structure of the cloth of this invention will be explained below with reference to the drawings.

A frame 1 for attaching cloth consists only of a frame part 2, and the frame part 2 is formed with an inner protrusion part 2a having a thickness smaller than that of the frame part 2. The frame 1 is formed with a frame support part 3 projecting outward from approximately the center of both sides thereof, and a liquid discharge part 4 projecting outward from the lower part of both sides. The two pieces of cloth 5 attached to both bundles of one frame 1 are slightly wider than the frame 1 and have a width that extends beyond the frame portion 2 (see FIG. 1). A stock solution hole 6 through which the stock solution passes is bored at opposing positions approximately in the center of the two pieces of cloth 5, and the stock solution hole 6
Overlap the periphery and sew double or quadruplely 7
Then, the two cloths 5 are joined. And the above cloth 5
Cloth attachment means, such as a tie string 8, are attached to two or more locations on each peripheral edge of.

To attach the cloth 5 to the frame 1, the sewing part 7
Open the two pieces of cloth vertically and horizontally, apply the periphery of the cloth 5 to both sides of the frame 2 of the frame 1, and connect the knot strings 8 attached to the periphery of each cloth 5 to connect the front and back sides. The two cloths 5, 5 are attached to both sides of the frame 1, and by moving the frame 1, the peripheral edge of the cloth 5 is crimped and fixed between the frame portion 2 of the adjacent frame 1.

As shown in FIG. 2, after all the frames 1 are crimped and fixed, when the undiluted solution is press-fitted from one side of the filter press, the undiluted solution passes through the undiluted solution hole 6 and is passed between the facing cloths 5 and 5 of the adjacent frames 1. The liquid flows into the chamber 9 formed by the cloth 5, flows through the liquid flow gap 10 between the cloths 5, 5, and passes through the liquid hole 11a formed at the lower corner of the frame to the liquid outlet 1.
1, while the solid content in the stock solution is accumulated in chamber 9. If the cloth becomes clogged with solids in the stock solution and the overefficiency decreases, stop the injection of the stock solution and send water or air to the chamber as necessary to remove the stock solution remaining in the chamber through plate liquid distribution. It drains through the gap 10 and then the frame is pulled open and the cake is removed from the cloth.

Although the above embodiment uses a knot string as the cloth attachment means, the present invention is not limited to the knot string. For example, by creating a mounting hole on the periphery of the cloth protruding from the frame,
This mounting hole may be inserted into a mounting rod embedded in the outer edge of the frame.

In the structure of the cloth explained above, the second
As shown in the figure, a coarse sheet 12 may be attached to the inner surface of the cloth 5 on the liquid outflow side. The above-mentioned coarse sheet is coarsely woven with thick filaments made of fibers, wires, etc., and the size of the coarse sheet is 1 in the hollow part of the frame.
It is smaller than 3. Further, as shown in FIG. 3, a coarse sheet 12 larger than the hollow portion 13
It is also possible to use a frame, align its periphery with the frame surface of the frame, and then extend it about 5 to 10 cm from the frame. In this case, one coarse sheet 12 is used,
It may be attached along the frame surface on one side of the frame, or it may be attached using two coarse sheets 12, one on each side of the frame surface. The coarse sheet 12 is cloth 5
The periphery of the undiluted solution hole drilled in the same manner as above is sewn together with the periphery of the undiluted solution hole 6 to be joined to the cloth 5. By providing this coarse sheet 12, it is possible to prevent a portion of the cloth from coming into contact with each other during the process and reducing the liquid flow gap 10.

The structure of the above-mentioned cloth is shown as having a solution hole perforated almost in the center of the cloth, but the upper part or a part of the frame has a hollow part 13 which is protruded into a rectangular shape and continues to the upper part of the rectangular shape. In the frame, the upper or lower part of the cloth is protruded in the same way as the frame, and by sewing the peripheral edge of the solution hole drilled into the protruding part of the cloth, it can be used in the same manner as in the above embodiment.

(Function and Effect) In the conventional center feed type filter press,
A hole for the stock solution is provided in the core part of the board, and the hole for the stock solution drilled in the cloth attached to both sides of the board is connected with a short cylindrical cloth or a short tube. Since two pieces of cloth were spread out on both sides of the plate, it was troublesome to stretch and remove them.However, this filter press uses a frame without a core plate, and the periphery of the cloth is Since the two pieces of cloth are fixed to both sides of the frame via the cloth attachment means provided in the frame, the attachment of the cloth,
It is easy to remove and connect the cloth's solution hole.

[Brief explanation of the drawing]

Fig. 1 is a front view of the cloth attached to the frame with a part cut away, Fig. 2 is a vertical sectional view taken along the - line of Fig. 1 with two frames arranged side by side, and Fig. 3 is a vertical sectional view of another example. It is a diagram. 1: Frame, 2: Picture frame, 5: Cloth, 6: Solution hole, 7: Sewing section, 8: Cloth attachment means.

Claims (1)

[Scope of Claims] 1. A solution hole is formed in the center or the periphery of two pieces of cloth, and the peripheral edges of the solution hole are sewn together,
Further, the structure of the cloth for filter press is provided with cloth attachment means on at least part of the opposing peripheral edges of the two cloths, so that the frame consisting only of the frame portions can be easily attached to filter presses arranged side by side. 2. A filter according to claim 1, in which a coarse sheet having a stock solution hole at a position corresponding to the stock solution hole of the cloth is sandwiched between the inside of the cloth, and the cloth and the coarse sheet are sewn along the periphery of the stock solution hole. Structure of press fabric.