JPH09155111A - Filter plate structure of filter press - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a filter plate structure of a filter press in which a cake does not remain at a mud mouth portion when peeling a cake. SOLUTION: In a filter press which forms a filter chamber by a plurality of filter plates stretched with a filter cloth, forms an undiluted solution feed mud port in the filter plate, and supplies the undiluted solution to the filter chamber for solid-liquid separation,
One or two inclined portions are formed at the undiluted solution supply port of each filter plate. [Effect] It is possible to remove the remaining deposits of the filter plate muddying port, which hinders the operation, by a normal opening frame operation, and it is possible to always keep the muddying port portion in the initial state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter press applied in a wide range of fields for solid-liquid separation.

[0002]

2. Description of the Related Art FIG. 5 is a conceptual view of a filter press, FIG.
And FIG. 3 is a diagram showing a general configuration example of the filter press, showing a single type and a double type, respectively. By feeding the stock solution 7 containing solid particles by the pressure pump 6 to the filter press 1 having the plurality of filter chambers 4 formed by tightening the filter plates 2 on which the plurality of filter cloths 3 are stretched, Through the mud inlet 5 of the filter plate, the undiluted solution 7 is stored in each filter chamber 4
Sent to. Here, the undiluted solution is separated into the solid particles remaining in the filter chamber and the water discharged to the outside by the filter cloth 3 stretched over the filter plate 2. By continuing the above filtering operation, a dehydrated cake mainly composed of solids will be formed in the filter chamber 4. The formed cake is normally peeled off from the filter cloth part by its own weight by sequentially opening the filter plate (referred to as opening frame operation), dropped and discharged to the outside (so-called cake peeling). In the figure, 8 is a filter frame, 9 is a rear head, 1
Reference numeral 0 is a first head, 11 is a pressing cylinder, and the loose head 12 is driven by pressure oil from a hydraulic pump 13.
Is moved to open and close the filter plate 2.

[0003]

FIG. 4 corresponds to FIG. 2 or FIG.
FIG. 3 is an enlarged cross-sectional view of the portion of the mud supply port 5 through which the undiluted solution 7 is passed in the apparatus shown in FIG. 1, and FIGS. 7 (a) and 7 (b) show examples of the remaining portion when the cake is peeled off. As shown in FIG. 4, since it is a simple cylindrical hole, a cake-like residue 14 remains in this portion, which may cause troubles such as cake peeling and filtering. In particular, in the case of a stock solution containing a self-hardening component such as cement, it is fully expected that it will be completely fixed and cause fatal injury.

One of the causes of the above-mentioned problem is that the filter chamber portion 4 and the mud supply port portion 5 are connected at an acute angle, so that the above-mentioned connecting surface portion, which is weakest when the cake is peeled off (cake falls), is cut. This is because In an extreme example, as shown in FIG. 4A, the cake may completely remain at the mud mouth. FIG. 4
As shown in (b), the remainder of the cake is generated in a part, and this part causes the part to grow as the operation is repeated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter plate structure of a filter press in which the cake does not remain at the mud mouth portion when the cake is peeled from the above problems.

[0006]

Means for Solving the Problems The present invention is to solve the above-mentioned problems, in which a filter chamber is formed by a plurality of filter plates on which filter cloths are stretched, and a stock solution feed port is formed in the filter plate. A filter press structure for supplying a stock solution to the filter chamber for solid-liquid separation, wherein one or two slopes are formed at the stock solution supply port of each filter plate. Is.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, when the cake is peeled off, the cake portion in the filter chamber 4 and the cake portion in the mud supply port 5 which are dropped and discharged are not separated but are integrally dropped and discharged so as to be discharged. To improve the shape of. Specifically, the specified weakest cross-section portion is provided in the cake cross section by forming the mud supply port with an inclined surface portion.

FIGS. 1 (a) to 1 (c) are views showing a cross section in the vicinity of the mud supply port of the filter plate according to the present invention. In the example in which the mud supply port portion has a one-sided inclined surface shape as shown in FIG. 1A, the mud supply port portion is provided with one weakest cross-section portion 15 (right side in the figure). When the cake is peeled off, the cake in the filter chamber 4 and the cake in the mud supply port 5 are integrated, and are separated and discharged by being separated at the weakest cross-section portion 15 (in the figure, integrated with the cake in the left filter chamber). It will be done and the mud mouth 5
There is no residue inside.

FIG. 1 (b) shows an example in which the mud supply port is in the shape of both slopes. In this case, the central part of the mud supply port 5 has the weakest cross section 15.
That is, the cake at the mud mouth part is separated at the central part and is dropped and discharged together with the cakes in the filter chambers on both sides. The basic idea of the one shown in FIG.
Same as (b), but with parallel surface 16 provided in a part (center part in the figure) intended to improve filter cloth life, filter cloth sewing work, and cost reduction of inclined surface processing Is.

[0010]

INDUSTRIAL APPLICABILITY In the filter press, it is possible to remove the remaining deposits of the filter plate mud mouth, which hinders the operation, by a normal open frame operation without any special equipment, and always keep the mud mouth part at the initial stage. It is possible to obtain a cleaning effect that keeps the state.

[Brief description of the drawings]

FIG. 1 (a), (b), (c) are enlarged cross-sectional views showing examples of a mud supply port portion in an apparatus of the present invention.

FIG. 2 Conventional example of filter press filter chamber structure (single type)
Figure showing

FIG. 3 Conventional example of filter press filter chamber structure (compound type)
Figure showing

4 (a) and 4 (b) are diagrams showing examples of the remaining deposits at the mud inlet in the conventional example, respectively.

FIG. 5 is a diagram showing a general configuration example of a filter press.

[Explanation of symbols]

 1 Filter Press 2 Filter Plate 3 Filter Cloth 4 Filter Chamber 5 Mud Mouth 6 Pressure Feed Pump 7 Undiluted Solution 8 Filter Frame 9 Rear Head 10 First Head 11 Pressing Cylinder 12 Loose Head 13 Hydraulic Pump 14 Remaining 15 Weakest Section 16 Parallel Surface

Claims (1)

[Claims] 1. A filter press in which a filter chamber is formed by a plurality of filter plates on which a filter cloth is stretched, a stock solution mud inlet is formed in the filter plate, and the stock solution is supplied to the filter chamber for solid-liquid separation. ,
A filter plate structure for a filter press, wherein one or two sloped portions are formed at the undiluted solution supply port of each filter plate.