JPS6238010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter press in which an overchamber is formed between adjacent plates.

In conventional filter presses, the stock solution that is press-filled into the filter chamber is filtered through a cloth supported on the plate surface, and then the liquid is guided to the liquid outlet along the grooves on the plate surface, from where it is discharged to the outside. The structure was such that it was discharged. Moreover, the structure is such that the cake that has passed through and adhered to the cloth is sieved off by vibrating the cloth using a vibrating device. However, the cloth stretches and wrinkles due to long-term use, and is often damaged, making repair work troublesome. Furthermore, the equipment for hanging the cloth and the vibrating device for sifting the cake are large-scale, and it has been desired to make them smaller and easier to maintain.

The object of the present invention is to overcome the drawbacks of conventional filter presses as described above.

The present invention will be explained below based on drawings showing embodiments thereof.

As shown in FIG. 1, the filter press according to the present invention (hereinafter referred to as the device of the present invention) has overchambers 2, 2, etc. formed between adjacent plates 1, 1, . . . As shown in FIGS. 2 and 3, at least a large part of its surface is covered with an overbody 3 made of gypsum that has water permeability. As the water-permeable gypsum, it is desirable to use homogeneous and hard calcined gypsum, which is used for plaster molds for cast molding and the like. At least one side edge of the upper, lower, left, and right side edges 4, 5, 6, and 7 of the overbody 3 is in contact with the outside air. In the embodiment shown in Figures 1-3, the plate 1 is made of mild steel or
On the surface of a solid substrate 8 made of material such as FRP,
For example, the layered overbody 3 with a thickness of 10 mm or more is fixed by a casting method, and the liquid is discharged to the outside of the part of the substrate 8 where the right end 5a of the lower edge 5 of the overbody 3 comes into contact. A passage 9 is bored for this purpose.

Furthermore, the filter press of the present invention is equipped with a pump means 13 for supplying compressed air to the side edge portion of the overbody 3 that is in contact with the outside air. In the illustrated embodiment, compressed air is supplied to the right end 5a of the lower edge of the overbody 3 through the passage 9.
Note that in other inventions, the compressed air supply means 13 may not be provided. Next, the operation of the device of the present invention will be explained.

When the stock solution to be filtered is forced into the chambers 2, 2, .
The stock solution pressurized into the overchamber 2 enters the water-permeable overbody 3 through the surface 3a exposed in the overchamber 2, as shown by arrow D in FIG. The sludge in the raw solution adheres to the surface 3a of the overbody 3 and forms a so-called cake 15. The liquid flows down the inside of the overbody 3 toward the side edge 5a of the overbody 3 that is in contact with the outside air, as shown by the arrow D, and in the illustrated embodiment, flows through the passage 9 of the filter press as shown by the arrow B. It is discharged to the outside. The device of the present invention is thus capable of passing the stock solution without using cloth. In the embodiment shown in FIGS. 1 to 4, a string 16 having an appropriate gap inside is attached to the surface 8a of the substrate 8.
In addition, it is desirable to arrange them in a grid pattern, radial pattern, etc. so that the liquid can be uniformly guided to the passage 9.

Cake 15 attached and formed on the surface 3a of the overbody 3
In order to remove the
As shown by arrow A in FIGS. 1 and 4, compressed air is supplied to the side edge 5a of the overbody 3 that is in contact with the outside air. In the illustrated embodiment, compressed air may be fed into the passage 9. The compressed air supplied to the overbody 3 travels through the overbody 3 in the opposite direction to the flow direction of the liquid, reaches the surface 3a of the overbody 3 to which the cake 15 is attached, and from there flows into the overbody 2. As it tries to blow inward, the air pressure at that time causes cake 15
is easily peeled off from the surface 3a of the overbody 3.
The peeled cake 15 is taken out by opening the plate 1. In this way, the cake can be easily removed from the plate 1. In addition, in the case of an invention in which the means 13 for supplying compressed air is not provided,
The cake may be peeled off manually after opening the plate 1.

The filter press shown in FIGS. 5 to 7 is another embodiment of the filter press of the present invention, in which overchambers 2, 2, . . . are formed between adjacent plates 1, 1, . However, as shown in FIGS. 6 and 7, the plate 1 has a holding frame 10 and its periphery is held by the holding frame 10, and a small piece is attached to the crosspiece. Grid 11 with holes 17
and an overbody 3 made of water-permeable gypsum that is fitted into the space of the lattice 11 by a casting method. Lower edge 5 of the overbody 3
There is a passage 12 in the holding frame 10 that the left corner 5b of the
is bored so that the left corner 5b of the overbody 3 is in contact with the outside air. Also in this embodiment, the side edge portion 5b of the overbody 3 that is in contact with the outside air is provided with:
Compression pump means 13 are provided for supplying compressed air, such as through passage 12.

Note that the plate 1 of the filter press of the present invention may be a plate-shaped plaster body with wire mesh or reinforcing bars embedded therein, and in this case also, a part of the side edge is in contact with the outside air, and the side edge Compressed air supply means 13
Preferably, the compressed air is supplied by.

In the case of the filter press of the present invention shown in FIGS. 5 to 8, the stock solution press-fitted into the filter chamber 2 is transferred to the filter press 3 fitted in the grid 11, as shown by the arrow E in FIG. invade inside. At this time, the stock solution is filtered, and sludge adheres to the surface 3a of the filter body 3 exposed in the filter chamber 2, forming a cake 15. The liquid flows through small holes 17, 1 made in the grid 11.
7, . . . while flowing inside the overbody 3 toward the side edge in contact with the outside air as shown by the arrow F. The liquid that has reached the side edges is discharged to the outside of the filter press through the passage 12, as shown by arrow B in FIGS. 6 and 8.

When peeling the cake 15 from the overbody 3,
The compressor pump means 13 pumps compressed air through the passage 12 to the overbody 3, as shown by arrow A in FIG.
Supplied to the side edges of the pipe that are in contact with the outside air. The compressed air flows in the opposite direction to the flow direction of the liquid, blows out from the surface 3a of the overbody 3 into the overchamber 2, and peels off the cake 15 from the overbody 3. When the invention does not have a means to supply compressed air, the cake is peeled off after the plates 1, 1, . . . are opened.

The filter press shown in FIGS. 9 to 12 is
Both plates 18, 18 by adjacent plates 18, 18
This is a filter press in which a chamber 19 is formed in between. The plate 18 has a number of holes 20,2
An overbody 31 made of a gypsum layer is fixed to the surface 21a of the hollow substrate 21 in which holes 0, . Liquid discharge hole 2
It is connected to the outside through 2. Therefore, a portion of the overbody 31 fixed to a portion of the hollow substrate 21 where the holes 20, 20, . . . are located is in contact with the outside air.

In this filter press, the stock solution pressurized into the over-chamber 19 enters the over-body 31 from the surface 31a of the over-body 31 exposed to the over-chamber 19, and the part of the over-body 31 that is in contact with the outside air. Kara hole 2
0 into the internal space X of the hollow substrate 21. At this time, the raw solution is passed through the overbody 31, and the sludge adheres to the surface 31a of the overbody 31 to form a cake 22. The liquid is in the internal space
The liquid is discharged from inside through the liquid discharge hole 22 to the outside of the filter press as shown by arrow B. Also, cake 2
2 from the overbody 31, the plate 1
Either peel off the cake 22 after opening the frame 8, or
Compressed air supply pump means 13 from liquid outlet 22
Compressed air is forced into the inside of the hollow substrate X, and the pressurized air enters the overbody 31 through the hole 20, and is blown from the surface of the overbody 31 into the overchamber 19 to peel off the blown cake 22.

As is clear from the above, the filter press of the present invention uses compressed air to peel off the cake from the plate, so the cake removal work is extremely easy. This is an excellent filter press that does not require a hanging device or a device that vibrates the cloth, and does not require troublesome repair work such as cloth repair work.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the device of the present invention, Fig. 2 is a front view of the plate of the device of the present invention, and Fig. 3 is the − of Fig. 2.
4 is an enlarged side sectional view of the lower half of the plate of the device of the present invention; FIG. 5 is a side sectional view of the device of the present invention; FIG. 6 is a front view of the plate of the device of the present invention; Fig. 7 is a side sectional view taken along the line - in Fig. 6, Fig. 8 is an enlarged side sectional view of the lower half of the plate of the device of the present invention, Fig. 9 is a side sectional view of the filter press, and Fig. 10 is the plate. 11 is a side sectional view taken along the line XI-XI in FIG. 10, and FIG. 12 is an enlarged side sectional view of the lower half of the plate. 1...plate, 2...overchamber, 3...overbody, 4,5,
6, 7...Side edge portion, 13...Compressed air supply means.

Claims (1)

[Claims] 1. In a filter press in which an over-chamber is formed between adjacent plates, each of the plates is a over-body whose surface is made of water-permeable gypsum, and the upper, lower, right and left sides of the over-body are A portion of at least one side edge of the edge is in contact with the outside air, and a compressed air supply means can be attached to the side edge of the overbody that is in contact with the outside air. A filter press featuring