JPH0529486B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a filter plate of a center feed type filter press and a conventional technology related to a center feed type filter press in which the filter plates are arranged. A stock solution supply hole is passed through approximately the center of the filter bed, which is thinner than the plate thickness of the frame portion of the filter, and an R is provided around the periphery of the stock solution supply hole. In addition, in a center feed type filter press in which the filter plates are arranged and tightened to perform filtration, the tightening of the filter plates creates a gap between the stock solution supply hole of one filter plate and the stock solution supply hole of the adjacent filter plate. are separated by approximately the thickness distance of the filter plate. The stock solution to be supplied to the filter press passes from the stock solution supply hole of the filter plate on the stock solution supply side, through the stock solution supply holes of each filter plate arranged close to the above distance in order, and then to the stock solution supply hole of the filter plate on the stock solution supply end side. In the process, the water is supplied to a filter chamber formed between the filter beds of each filter plate.

Problems to be Solved by the Invention Incidentally, the stock solution is not always equally supplied from the filter chamber between the filter plates arranged on the stock solution supply side to the filter chamber between the filter plates arranged on the supply end side every time it is filtered. In some cases, every other filter chamber may become empty, or the stock solution may not flow sufficiently into the filter chambers between the filter plates arranged after the middle.

The present invention solves the drawbacks of the conventional technology such as the above-mentioned filter chamber being empty, and provides a filter plate and an arrangement of the filter plates that can uniformly supply the stock solution to each filter chamber and perform stable filtration. The purpose of this project is to provide a filter press that does the following.

That is, the present invention provides a filter plate of a center feed type filter press in which a part of the lower inner peripheral part of the stock solution supply hole has a thickness approximately equal to that of the frame part, and the thickness dimension of the lower inner peripheral part is equal to the length. It is formed into a gutter-like body. Further, by arranging and tightening the filter plates, a series of gutter-like stock solution supply channels are connected from the stock solution supply hole side of the filter plate at one end to the stock solution supply hole side of the filter plate at the other end. The center feed type filter press is configured such that the stock solution flowing through the supply channel overflows from the gutter-like body of each filter plate and is supplied to the filter chamber formed between the filter beds of each filter plate.

Effects/Effects In the above configuration, the lower inner peripheral part of the part of the stock solution supply hole that penetrates approximately the center of the filtration bed of the filter plate has a thickness approximately equal to that of the frame, and a gutter having a length equal to the thickness dimension. By being formed into a shape, the trough-like body of the stock solution supply hole of the filter plate allows the supplied stock solution to flow into the trough-like body of the filter plate adjacent to the filter plate, but the trough-like body of the stock solution supply hole of the filter plate Block the flow directly below. Then, a part of the stock solution flowing through the trough-like body is supplied to the filter chamber by overflowing to the side of the trough-like body.

In addition, by arranging and tightening the filter plates having stock solution supply holes made of the gutter-like bodies described above, it is possible to move from the stock solution supply hole side of the filter plate at one end of the filter press to the stock solution supply hole side of the filter plate at the other end. A series of gutter-like stock solution supply channels are connected. In the process of guiding the stock solution supplied from the stock solution supply hole side at one end to the stock solution supply hole side of the filter plate at the other end and flowing it, a part of the stock solution is sequentially passed through the gutter-like body of each filter plate. The water overflows to the side and is supplied to the filter chamber formed between the filter beds of each filter plate. Also,
To stably pass a stock solution through the stock solution supply hole of each filter plate without clogging it and equally supply it to each filter chamber.

Example An example will be described with reference to the drawings. 1st,
In Figures 2 and 3, numeral 1 indicates the filter plate (also referred to as a single filter plate) of the center feed type filter press, 2 is the frame, 3 is the filter bed, and 4 is the stock solution supply hole that penetrates approximately the center of the filter bed. It is. Reference numeral 5 denotes a half-moon-shaped protuberance provided on the inner peripheral edge of a part of the lower inner periphery 6 of the stock solution supply hole 4 . The protrusions 5, 5 on the peripheries on both sides together with the inner periphery 6 form an inner periphery width 7 at a portion below the stock solution supply hole 4. The inner circumferential width 7 has approximately the thickness of the frame portion 2, whereas the width 9 of the upper inner circumference 8 of the stock solution supply hole 4 is made thinner and narrower than the plate thickness of the filter bed portion. The upper surfaces of both sides of the semicircular raised portion 5 are overflow surfaces 10 that allow the stock solution to overflow to the sides.
to do. Raised portions 5, 5 having the above-mentioned overflow surface 10
As a result, a gutter-like body 11 having an inner circumferential width 7 is formed at the lower inner circumferential portion of the stock solution supply hole 4 . The depth L1 of this gutter-like body 11 is approximately 1/4 of the diameter of the stock solution supply hole 4.
It is. 12 indicates a filter cloth. By the filter cloth 12,
The stock solution supply hole 4 is wrapped as shown in FIG. Although the filter plate 1 in the above-described example has a square shape, it may have a circular shape or another shape. Further, if the filter plate 1 of the present invention is composed of a substrate and an elastic membrane covering the surface thereof, the raised portion 5 may be formed on the substrate or on the elastic membrane. As a result, a gutter-like body 11 is formed on the filter plate 1.

The raised portion 13 shown in FIGS. 4, 5, and 6 is located in the lower half of the periphery of the stock solution supply hole 4, and extends laterally with its upper sides on both sides flat. The plane includes an overflow surface 14 that guides the supplied stock solution to the side and overflows;
14 (Figure 6). The raised portion 13 having the overflow surface 14 forms a gutter-like body 15 at the lower inner peripheral portion of the stock solution supply hole 4 . 16 indicates the width of the overflow surface 14 extending laterally. Also,
L2 indicates the depth of the gutter-like body 15 (approximately 1/2 of the diameter of the stock solution supply hole 4). FIG. 7 shows a configuration in which the gutter-like body can be replaced with another gutter-like body in the same filter plate. 17 is the stock solution supply hole 4
It is a raised piece on one side that is fitted on the left side of the. Reference numeral 18 denotes a raised part provided at the lower part of the raised part, and 19 denotes a support ring fixed inside the raised part 18, which is fitted into the inner periphery of the stock solution supply hole 4, and the raised part 18 is placed on the lower left side periphery of the stock solution supply hole 4. support. Moreover, 20 is a raised piece fitted into the right side of the stock solution supply hole 4. Reference numeral 21 denotes a raised portion thereof, and 22 is a support ring fixed inside the raised portion 21, which is fitted into the inner periphery of the support ring 19 to support the raised portion 21 on the right lower periphery of the stock solution supply hole 4. do. A gutter-like body 23 is formed at the lower inner peripheral portion of the stock solution supply hole 4 by the raised portions 18 and 21 provided on the raised pieces 17 and 20 on both sides. The raised portions 18 and 21 may be made of hard or semi-hard rubber or synthetic resin, or may be made of metal. The gutter-like body 23 is wrapped inside the filter cloth 12, as shown in FIG. Gutter-like body 23 in Fig. 7
The overflow surface 24 is located approximately 5/8 (depth L3) from the lower inner circumference of the stock solution supply hole 4.

The filter plates 1 constructed as described above are arranged as shown in FIG. 2, and a tightening device (not shown) for the filter plates 1 is disposed on one side to constitute a center feed type filter press. For purposes of explanation, there is a gap between the filter plates 1 and 1. In the figure, reference numeral 25 indicates a gutter-like stock solution supply path that continues from one end, for example, the stock solution supply hole side of the filter plate 1 on the left side, to the stock solution supply hole side of the filter plate 1 on the right side end. In FIG. 1, 26 has an opening 27 in the filter bed 3 at one end and a frame 27 of the filter plate 1 at the other end.
This is a communicating hole that opens into the filtrate hole 28 that penetrates through the filtrate hole 28 in the thickness direction. In addition, the stock solution supply hole 4 and the filtrate hole 28
and lead to a stock solution supply pipe and a filtrate discharge pipe (both not shown) connected to the end plate of the filter press, respectively.

The arrow F1 in the stock solution supply hole 4 in FIG. 1 indicates the supply direction of the stock solution. While the stock solution supplied in the direction of arrow F1 flows through the gutter-like stock solution supply path 25 shown in FIG.
The overflow surfaces 10, 14, 24 of 15, 23 are made to overflow into each filter chamber in sequence. This ensures that all filter chambers are filled with stock solution. In addition, while the filter chamber is filled with the stock solution, the stock solution also flows into each filter chamber from between the upper inner circumferences 8, 8 of the stock solution supply holes 4 of each filter plate 1, 1 arranged above the gutter-like stock solution supply path 25. flows to Therefore, the stock solution can be stably supplied from the stock solution supply hole 4 of each filter plate 1 to each filter chamber, and there is no problem of leaving the filter chamber empty. Note that the stock solution flowing through the gutter-like stock solution supply path 25 flows through the gutter-like bodies 11 and 1 of each filter plate 1.
5, 23 and the gutter-like bodies 11, 15, 23, and the gutter-like bodies 11, 15, 23 of each of the above-mentioned filter plates 1 rarely leak and flow directly below.
Even if there is a slight gap between the joints of the trough-like bodies 11, 15, and 23, and some of the undiluted solution leaks downward from the joints, there is no particular problem if only a small amount of the undiluted solution leaks.

The stock solution supplied to the filter press as described above is filtered by the filter cloth 12 and separated into a solid content and a filtrate part, and the solid content is collected in each filter chamber.
The filtrate that has passed through the filter bed 3 of each filter plate 1 passes through the communication hole 26 from the opening 27 of the filter bed 3 of each filter plate 1, collects in the filtrate hole 28, and is discharged from the end plate to the outside of the machine. When the solid content reaches a predetermined amount and the amount of filtrate discharged decreases, filtration is stopped and the filter plate tightening device is moved back. Next, the solid content (cake) in each filter chamber is discharged in a plate-opening operation, and the filtration operation is completed.

[Brief explanation of the drawing]

1 is a front view of a filter plate of a center feed type filter press according to the present invention, FIG. 2 is a sectional view taken along the line Y1-Y1 of the filter plate of FIG. 1, and FIG. 3 is a front view of the filter plate of FIG. 4 is a front view showing the stock solution supply hole portion of the filter plate of another example, and FIG.
2-Y2 line sectional view, Figure 6 is X2-X2 in Figure 4
A line sectional view and FIG. 7 are longitudinal sectional views showing the stock solution supply hole portion of the filter plate in still another example. DESCRIPTION OF SYMBOLS 1... Filter plate of center feed type filter press, 2... Picture frame, 3... Filter bed, 4... Stock solution supply hole, 5, 13, 18, 21... Raised portion, 6... Lower inner periphery, 7 ...Lower inner circumference width, 8...Upper inner circumference,
9... Upper inner peripheral width, 10, 14, 24... Overflow surface, 11, 15, 23... Gutter-like body, 12... Filter cloth, 16... Width of overflow surface 14, 17, 20 ... Raised piece, 19, 22 ... Support ring, 25 ... Gutter-like stock solution supply channel, 26 ... Communication hole, 27 ... Opening, 28 ...
...filtrate pore.

Claims (1)

[Scope of Claims] 1. In a filter plate of a centafeed type filter press having a stock solution supply hole approximately in the center of a filter bed that is thinner than the plate thickness of the frame portion, a portion of the lower inner peripheral portion of the stock solution supply hole is provided. A filter plate for a center feed type filter press, characterized in that it is formed into a gutter-like body having a thickness approximately equal to that of a picture frame and having a length equal to the thickness of the lower inner peripheral portion. 2. By arranging and tightening each filter plate having a stock solution supply hole made of a gutter-like body according to claim 1, the gutter-like bodies of each filter plate are brought together, and the stock solution at one end of the filter press is supplied. A series of trough-like stock solution supply channels are connected from the stock solution supply hole side of the filter plate to the stock solution supply hole side of the filter plate at the other end, and the stock solution flowing through the supply channels overflows from the gutter-like body of each filter plate. A center feed type filter press characterized in that it is configured to flow and be supplied to a filter chamber formed between filter beds of each filter plate.