JPS58114705A - Filter plate - Google Patents

Abstract

PURPOSE:To obtain a nearly uniform dehydrating rate of solid matter over the whole parts of a pressure filter by varying the thickness of each pressure filter plate which has a liquid passing hole in the center and a liquid collecting hole at the circumferential edge from the center part to both sides. CONSTITUTION:Platelike bodies 11A and 11B of filter plates 20A-20C have liquid passing holes 12A and 12B at the center parts, flow guiding grooves 30A-30C are formed in internal surfaces of the platelike bodies 11A and 11C and both surfaces of the body 11B, and, for example, porous thick plates 13A-13C are provided at lower half parts respectively. Further, the platelike bodies 11A- 11C have circumferential frames 14A- 14C and holes 15A-15C for collecting and discharging filtered liquid at low circumferences, and communicate with the grooves 30A-30C through conduit holes 17A-17C. The hole 15C is a blind hole. Thus, the thickness of the lower side then the central part of each filter plate is made larger than the upper side thereof; they are arranged as shown in figure, and filter cloths 16A-16C are sandwiched between filter plates. Consequently, the upper part 20A' of a filter room 20' is wider than the lower part 20'B and liquid to be filtered is forced in as shown by an arrow through a pump 18B to make nearly uniform the dehydrating rate of solid matter deposited in each filter room.

Description

[Detailed description of the invention] The present invention relates to a track board used for pressure filtration.

Conventionally, in this type of shoe, as shown in Fig. 1, a plate-like body (1), (
1) B has a liquid passage hole in the center, (2) a plate-like body, (1) an inner surface of O+IO, and a liquid-conducting groove on the plate-like body (1) BO1iliK. (3) Mu, (3)
11, (3)0 is formed, and a plate-like body 0)mu,
(1) B, (1) OK is the surrounding frame (4) M, (4) B
, (4) 0 is surrounded and the surrounding frame ←) Mu, (4) Im
, (4) A filtrate discharge hole (5) is provided on the lower edge of the 0.

(5) B and (5) O are provided. In order to perform pressure filtration in this way, the pressure filter is placed at both ends, and a plurality of shoe plates 04B are placed in the middle, overlapped, and fixed by applying an appropriate pressing force to both ends, and the pressure filter is installed. At this time, a filter cloth (6), (
8) Hold B and (8) O. In this way, if the liquid to be treated is forced into the liquid passage hole (2) of the filter plate from the injection path (8) along the arrow by the pump (7) K formed in the pressure filter for the chamber member. The liquid to be treated is filter plate QIB.

Insert the filter cloth (6) along the arrow through the liquid passage hole (2)B of o40.
) h , (6)11 , <ts) in O [p・chi tl
l*Otl is filled with filter cloth (6), (6) B, (
6) Filtered by OK. Thus, as shown by the filtrate arrow, each filter plate (g) AlOB, @0 filtrate discharge hole (5
)um, (5)B, (5)0. Filter cloth (6
) M, (8) B, (6) (3) As the solid content contained in the liquid to be treated accumulates inside, the temporary pressure increases, and the filtration process ends when the predetermined pressure is reached. After this - board (to)
Air in the liquid passage hole Q).

Pressure gas such as falcon gas is injected into the filter cloth (6), (6)
11. Squeeze and dehydrate the solid content deposited in (@)0. However, in this case, the width of the filter chamber is substantially uniform, and the density of the solids deposited inside the filter cloth (6), (8)B, and (6)0 is approximately uniform. Therefore, the pressurized gas pressurized into the pressurizer selectively flows upward in one chamber at a rate of ζ due to buoyancy. Thus, in Muromachi, only the upper half of the solids deposited inside the filter cloths (6) M, (6) B, and (6) O are selectively compressed and dehydrated, while the lower half is mostly dehydrated. I can't help it.

The purpose of the present invention is to improve the above-mentioned conventional drawbacks, to uniformly dehydrate the solid content accumulated inside the iron chamber, and to easily collect the filtrate. Make a hole,
The key points are that liquid collection holes are installed on the periphery, and the plate thickness on one side from the center is thicker than on the other side.

The present invention will be explained with reference to an embodiment shown in FIG. 2 and below: (2) 1. −〇, the plate-shaped body (
B) M and B are provided with liquid passage holes (R) M and B in the center 11, respectively, and both sides of the plate-shaped body (2) M, the inner surface of the C and the plate-shaped body (1) B are provided. There is a flow guide groove, -B.

is formed and the lower half of each is made of e.g. a porous plank.
Mu, Q1n, (4c is stretched, and the plate-like body @mu, (
B) B, (b) OK" are waste frame trout, @B, (b) C are surrounded, and the plate-like bodies (b) A, (b) B, (b) CO
There are liquid collection holes (G) A and QQ on the lower periphery to collect and discharge the filtrate.
B, (to) C are provided, and the liquid collecting holes (4), (c) B, (g) C are connected to the flow guide grooves), (3) B, and (3) OIO. Guide hole a
η M, (b) B, Q30 will contact you. In addition, the liquid collection hole (to)
C is a blind hole. The thickness of the lower plate from the center of the plate-like bodies aIB and (b) C in the upper filter plates B and (e) C is the thickness of the upper plate by the thick plate (to) m, (to) B, and (to) C. The board thickness υ can also be increased.

The above filter plate (1) is arranged with @Ja on both ends, and is polymerized with a plurality of filter plates gOBt arranged in the middle to form a liquid collecting hole αiIA.

(To) B and (To) 0 are attached to each other, and an appropriate pressing force is applied to both ends to fix them to form a pressure filter, but between each filter plate, &JB, and C, 1 cloth 04mm.

(To) B, (40 is clamped. In this way, a filter chamber is formed in the pressure line filter, but the upper S chamber of the filter chamber is
It is 1 width wide, and the lower cdB is sandwiched in between.

In the pressure filter 11 with the above configuration, if the liquid to be treated is forced into the liquid passage hole (to) of the filter plate from the injection path (2) along the arrow with the pump @, the energized m* is Liquid passage hole in plate @B (
To) 1, go out along the arrow through the filter cloth, @B, @0 and flow down through the guide groove, -1° #OK to the guide hole (2)
M, @@B, through 40, follow the arrow to the liquid collection hole ■ M,
So B, @OK flows in and is discharged from the outlet of the liquid collecting hole as shown by the arrow. Such - one child in overwork -
The lower part -1 of the i-middle is first filled with the solid content C of the liquid to be treated. At the time of Jin, the upper part of the filter width is still 1.
Due to the iIjlI minute OK, it is not completely filled and a gap I is created. This state 1 is shown in No. 411. When the lower part-1 is filled with 1iIy# of C, the filtration pressure increases rapidly and the filtration rate decreases rapidly. If you open the liquid discharge path #m, there will be a gap between the upper part and the liquid passage hole #1,
(b) Bff remains. The liquid to be treated is discharged through the discharge path (6)
Next, close the discharge path (2) and open the branch pipe (to) B of the injection path (to) to allow pressurized gas such as air or i1 to pass through the liquid hole (to) and pressurize it. Press fit into the radiation device. The pressurized gas injected into the strainer enters the filter chamber 4 through the gap E to compress and dehydrate the solid content deposited in the upper part d and the wA part filled in the lower part mBK. In this way, the solid content C deposited on the upper part 1 is compressed uniformly by the pressure gas through the gap E, so that the dewatering efficiency is improved, and the dewatering rate is lower than the solid content C deposited on the lower part 11AfdBK. C
Thus, a substantially low solids dewatering rate can be obtained over the entire pressure liner. After the dehydration process is completed, the polymerized Ippai Somu, 94B.

Remove the pressing force exerted on both ends of Korea C and remove the filter plate...Mom, -B
, (a) 0 respectively, I11 cloth (2) Mu, QIB
, the solid content deposited in QiO is taken out.

The present invention is not limited to the above embodiments, and for example, as shown in FIG. ...B and a pair of radial liquid guide holes -1 may be provided, or as shown in FIG. Liquid collection hole (2)
IK may also be used.

Since the present invention has the above-mentioned configuration, the liquid to be treated that is press-injected into the iron cloth through the liquid passage hole of the plate-like body is passed through by degeneracy, and the filtrate is collected in the liquid collecting hole and discharged from one joint. The liquid collecting means is thus greatly simplified.

Also, change the thickness of one side from the center of the plate to the other side)
Since the size of the board is also large, one chamber formed by polymerizing such a board is formed from the central part (one side is more central than the other), Even when the sandwiched part is filled with the liquid to be treated, the m-type part K that has accumulated in the wide part of 11w1 [occurs]
At this point, if the pressure gas is applied after the temporary process is stopped and the remaining liquid to be treated is discharged, the pressure gas will squeeze out the solid content through the gap in the wide area. A substantially uniform solid content dewatering rate can be obtained throughout the filter.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a conventional filter plate in a superposed state, and Fig. 2 and the following show an embodiment of the present invention. 4WJ is a side sectional view of the g chamber portion, Figure 615 is a front view of another embodiment, and Figure 6 is I! FIG. 3 is a front view of another embodiment.

Claims (1)

[Claims] A liquid passage hole is provided in the center of the plate, a liquid collection hole is provided in the waste part, and one llO plate thickness is extended from the center to the other side)
A filter plate with a large grain on standby.