A composite filter cloth slag removal filter press

Abstract

This application relates to the technical field of filter presses, and discloses a composite filter cloth slag-removing filter press, which includes a frame. There are first diversion holes inside the frame. A set of elastic rings are respectively arranged on the left and right sides inside the frame, and a filter screen is arranged on the inner side wall of the elastic ring. An expansion ring with an outer surface in frictional contact with the inner wall of the frame is arranged in the middle of the elastic ring. A piston member is arranged at the side end of the frame, and initially, the piston member protrudes from the side end of the frame under the elastic force of the elastic member, and a pressing diaphragm is arranged in the middle of the frame. For a composite filter cloth slag-removing filter press, through the setting of the elastic ring, the piston member and the linkage structure therebetween, the elastic deformation of the expansion ring can be used to compensate for the deformation of the filter screen when it is squeezed, so that the filter screen is not easily damaged due to excessive deformation when it is squeezed, effectively prolonging the service life of the filter screen and making its filtration and dehydration efficiency of sewage sludge relatively high.

Description

Technical Field

[0001] The present application relates to the technical field of filter presses, and in particular to a composite filter cloth slag-removing filter press. Background Art

[0002] A filter press is a solid-liquid separation device with mature technology. By mechanical or hydraulic means, several groups of filter mechanisms are squeezed together to form several filter chambers, and a pressing diaphragm can be arranged inside the filter mechanism. Then, when it is inflated and expanded, a certain pressure can be applied to the filter chamber to dehydrate the filtered filter cake, so that the filter press is widely used in the environmental protection field and becomes an important component device for sewage and sludge treatment;

[0003] However, the filter screen structure on the existing filter press is subjected to forward extrusion by sewage and sludge during filtration, and reverse extrusion by the pressing diaphragm during dehydration, resulting in a large degree of extrusion deformation during operation and being extremely prone to deformation due to excessive stretching, which seriously affects the filtration effect and service life of the filter screen structure. Moreover, due to the influence of extrusion, the filter cake is extremely prone to adhering to the filter screen structure, making it difficult for some filter cake to fall off during the discharging process, further affecting the filtration and dehydration efficiency of the filter press for sewage and sludge next time, and the stability and reliability are poor.

[0004] Therefore, there is an urgent need for a filter screen structure for a filter press to solve the defects existing in the filter screen structure of the existing filter press during the actual operation process. Summary of the Invention

[0005] The present application provides a composite filter cloth slag-removing filter press, which has the advantages of effectively reducing the deformation of the filter screen structure thereon when being extruded, making the filter cake not easily adhere to the filter screen structure, and having a high filtration and dehydration efficiency for sewage and sludge, so as to solve the problems that the filter screen structure on the existing filter press needs to bear a large degree of extrusion deformation during operation and is extremely prone to deformation due to excessive stretching, which seriously affects the filtration effect and service life of the filter screen structure. Moreover, due to the influence of extrusion, the filter cake is extremely prone to adhering to the filter screen structure, making it difficult for some filter cake to fall off during the discharging process.

[0006] To achieve the above object, the present application adopts the following technical solution: A composite filter cloth slag-removing filter press, comprising a filtering mechanism movably installed on a frame for filtering and dewatering sewage sludge. The filtering mechanism is composed of several groups of frames combined in a linear array, and a filtering chamber is formed between adjacent two groups of frames. A set of first diversion holes for circulating filtrate are respectively provided at the four corners inside the frame. When several groups of frames are pressed together mechanically or hydraulically, a circulation pipeline can be formed to discharge the filtrate. A set of elastic rings are respectively provided on the left and right sides inside the frame, and a filter screen for filtering and dewatering operations is provided on the inner side wall of the elastic ring. An expansion ring whose outer surface is in frictional contact with the inner wall of the frame is provided in the middle of the elastic ring, so as to prevent sewage sludge from entering the inner cavity of the frame through the setting of the expansion ring. Four sets of piston members arranged in a circular array are provided at the side end of the frame, and a sealed chamber is formed inside the frame through the piston members. The sealed chamber is communicated with the expansion ring through a diversion hose provided on the frame. Thus, the elastic deformation of the expansion ring can be used to compensate for the deformation of the filter screen when it is squeezed, so that the filter screen is not easily damaged due to excessive deformation when it is squeezed. At the same time, the sealing performance between the elastic ring and the frame can be further improved by increasing the gas filling amount in the expansion ring. One end of the piston member is elastically connected to the frame through an elastic member provided inside the frame. Initially, the piston member protrudes from the side end of the frame under the elastic force of the elastic member. When several groups of frames are pressed together, the piston member can be squeezed and forced to move inward to compress the elastic member and supplement the gas filling amount in the inner cavity of the expansion ring. A second diversion hole for circulating sewage sludge is provided in the middle of the filter screen and runs through from left to right. When several groups of frames are pressed together mechanically or hydraulically, a circulation pipeline can be formed to transport the sewage sludge to the filtering chamber formed by the frames. A pressing diaphragm for squeezing and dewatering the filter residue is provided in the middle of the frame. The inside of the pressing diaphragm is communicated with an external air pressure pump station through a pipeline. Thus, after the filter screen finishes filtering the sewage sludge, gas can be transported into the pressing diaphragm to make it expand, and the filter residue filtered by the filter screen can be squeezed to perform a dewatering operation. A circulation groove communicated with the first diversion hole is provided inside the frame and located between the filter screen and the pressing diaphragm. Thus, the filtrate can be transported to the first diversion hole through the circulation groove and discharged.

[0007] Further, a steel wire rope is provided in the middle of one end of the piston member and is fixedly connected to the top of one side of the elastic ring through the steel wire rope. When several groups of frames are separated from each other and the filter residue is removed, under the elastic force of the elastic member, the piston member moves outward to convey part of the gas in the expansion ring to the sealed chamber to reduce the mutual friction between the expansion ring and the frame. At the same time, under the driving action of the steel wire rope, the top end of the elastic ring can be driven to move inward and turned inward to drive the filter screen to vibrate, thereby shaking off the filter residue adhering to the filter screen.

[0008] Further, the elastic expansion amount of the inner side end of the expansion ring is greater than that of the outer side end. When the piston member is extruded and moves inward, due to the greater expansion amount on the inner side of the expansion ring than that on the outer side, the elastic ring is forced to turn outward, so that the elastic ring and the filter screen thereon return to the initial position to filter the sewage sludge conveyed by the second diversion hole.

[0009] Further, an annular rubber gasket is provided inside the frame at a position corresponding to the expansion ring, and the track of the inner wall of the rubber gasket is adapted to the outer surface of the expansion ring, so as to effectively improve the relative sealing between the expansion ring and the frame, making it difficult for sewage sludge, filtered water or filter residue to enter the inside of the frame.

[0010] Further, the inner cavity of the expansion ring is filled with inert gas with full volume, so as to effectively reduce the problem of poor sealing caused by thermal expansion and contraction between the expansion ring and the frame, making the filtration mechanism have better adaptability to the working conditions.

[0011] Further, a group of elastic gaskets protruding from the side end of the frame are respectively provided at the ends of the first diversion hole and the second diversion hole. When several groups of frames are squeezed and stacked together, the sealing of the flow pipeline formed by the first diversion hole and the second diversion hole on several groups of frames can be effectively improved, making it difficult for the filtered water or sewage sludge flowing through it to leak.

[0012] The beneficial effects of the present invention are as follows:

[0013] A composite filter cloth slag-removing filter press provided by the present application, through the setting of the elastic ring, the piston member and the linkage structure therebetween, can compensate for the deformation of the filter screen when it is squeezed through the elastic deformation of the expansion ring, so that the filter screen is not easily damaged due to excessive deformation when it is squeezed, effectively prolonging the service life of the filter screen. And when several groups of frames are separated from each other and the filter residue is removed, under the elastic force of the elastic member and the driving action of the steel wire rope, the top end of the elastic ring can be driven to move inward and turned inward to drive the filter screen to vibrate, thereby shaking off the filter residue adhering to the filter screen, and thus having higher filtration and dehydration efficiency for sewage sludge. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings:

[0015] Figure 1 Structural schematic diagram of the present invention;

[0016] Figure 2 Structure of the present invention Figure 1 Enlarged schematic view of part A of the structure;

[0017] Figure 3 Schematic diagram of the elastic ring of the structure of the present invention;

[0018] Figure 4 Structure of the present invention Figure 1 Partial front view of the structure;

[0019] Figure 5 Partial sectional view of the structure of the present invention;

[0020] Figure 6 Structure of the present invention Figure 5 Enlarged schematic view of part B of the structure;

[0021] Figure 7 Structure of the present invention Figure 5 Partial front view of the structure.

[0022] In the figure: 1 - frame, 2 - first diversion hole, 3 - elastic ring, 4 - filter screen, 5 - expansion ring, 6 - piston member, 7 - steel wire rope, 8 - elastic member, 9 - diversion hose, 10 - pressing diaphragm, 11 - flow channel, 12 - second diversion hole. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] As Figures 1-4As shown in the figure, a composite filter cloth slag-removing filter press includes a filtering mechanism movably installed on a frame for filtering and dewatering sewage sludge. The filtering mechanism is composed of several groups of frames 1 combined in a linear array, and a filtering chamber is formed between adjacent two groups of frames 1. A set of first diversion holes 2 for circulating filtrate are respectively arranged at the four corners inside the frame 1. When several groups of frames 1 are squeezed together in a mechanical or hydraulic manner, a circulation pipeline can be formed to discharge the filtrate. A set of elastic rings 3 are respectively arranged on the left and right sides inside the frame 1, and filter meshes 4 for filtering and dewatering operations are arranged on the inner side walls of the elastic rings 3. An expansion ring 5 with an outer surface in frictional contact with the inner wall of the frame 1 is arranged in the middle of the elastic ring 3. Thus, through the arrangement of the expansion ring 5, sewage sludge is prevented from entering the inner cavity of the frame 1. Four sets of piston components 6 arranged in an annular array are arranged at the side end of the frame 1, and a sealed chamber is formed inside the frame 1 through the piston components 6. The sealed chamber is communicated with the expansion ring 5 through a diversion hose 9 arranged on the frame 1. Thus, the elastic deformation of the expansion ring 5 can be used to compensate for the deformation of the filter mesh 4 when it is squeezed, so that the filter mesh 4 is not easily damaged due to excessive deformation when it is squeezed. At the same time, the tightness between the elastic ring 3 and the frame 1 can be further improved by increasing the gas filling amount in the expansion ring 5. One end of the piston component 6 is elastically connected to the frame 1 through an elastic member 8 arranged inside the frame 1. Initially, the piston component 6 protrudes from the side end of the frame 1 under the elastic force of the elastic member 8. Thus, when several groups of frames 1 are squeezed together, the piston component 6 can be squeezed and forced to move inward to compress the elastic member 8, and the gas filling amount in the inner cavity of the expansion ring 5 is supplemented. A second diversion hole 12 for circulating sewage sludge is arranged in the middle of the filter mesh 4 and penetrates through the left and right. When several groups of frames 1 are squeezed together in a mechanical or hydraulic manner, a circulation pipeline can be formed to transport the sewage sludge to the filtering chamber formed by the frame 1, as Figure 7 shown in the figure. A pressing diaphragm 10 for squeezing and dewatering the filter residue is arranged in the middle of the frame 1. The inside of the pressing diaphragm 10 is communicated with an external air pressure pumping station through a pipeline. Thus, after the filter mesh 4 finishes filtering the sewage sludge, gas can be transported into the pressing diaphragm 10 to make it expand, and the filter residue filtered by the filter mesh 4 is squeezed to perform a dewatering operation. A circulation groove 11 communicated with the first diversion hole 2 is arranged inside the frame 1 and between the filter mesh 4 and the pressing diaphragm 10. Thus, the filtrate can be transported to the first diversion hole 2 through the circulation groove 11 and discharged.

[0025] As Figures 5-7As shown in the figure, in this technical solution, a steel wire rope 7 is provided in the middle of one end of the piston member 6, and is fixedly connected to the top of one side of the elastic ring 3 through the steel wire rope 7. Then, when several groups of frames 1 are separated from each other and the filter residue is removed, under the elastic force of the elastic member 8, the piston member 6 moves outward to transport part of the gas in the expansion ring 5 into the sealed chamber to reduce the mutual frictional force between the expansion ring 5 and the frame 1. At the same time, under the driving action of the steel wire rope 7, the top end of the elastic ring 3 can be driven to move inward and turn it inward to drive the filter screen 4 to vibrate, thereby shaking off the filter residue adhering to the filter screen 4.

[0026] As Figures 1-3 shown, in this technical solution, the elastic expansion amount of the inner end of the expansion ring 5 is greater than that of its outer end. Then, when the piston member 6 is extruded and moves inward, due to the greater expansion amount of the inner side of the expansion ring 5 than that of the outer side, the elastic ring 3 is forced to turn outward, so that the elastic ring 3 and the filter screen 4 thereon are restored to their initial positions to filter the sewage sludge conveyed by the second diversion hole 12.

[0027] As Figure 2 shown, in this technical solution, an annular rubber gasket is provided inside the frame 1 at a position corresponding to the expansion ring 5, and the track of the inner wall of the rubber gasket is adapted to the outer surface of the expansion ring 5. Then, the relative sealing performance between the expansion ring 5 and the frame 1 can be effectively improved, so that sewage sludge, filtered water or filter residue is not easily introduced into the inside of the frame 1.

[0028] In this technical solution, the inner cavity of the expansion ring 5 is filled with inert gas with full volume. Then, the problem of poor sealing performance caused by thermal expansion and contraction between the expansion ring 5 and the frame 1 can be effectively reduced, so that the filtering mechanism has good adaptability to the working conditions.

[0029] As Figure 1 , Figure 4 and Figure 7 shown, in this technical solution, a set of elastic gaskets protruding from the side end of the frame 1 are respectively provided at the ends of the first diversion hole 2 and the second diversion hole 12. Then, when several groups of frames 1 are squeezed and stacked together, the sealing performance of the flow pipeline formed by the first diversion hole 2 and the second diversion hole 12 on several groups of frames 1 can be effectively improved, so that the filtered water or sewage sludge flowing through it is not easily leaked.

[0030] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite filter cloth deslagging filter press, comprising a filter mechanism, wherein the filter mechanism is composed of a plurality of frames (1), and a filter chamber is formed between two adjacent frames (1), and a group of first guide holes (2) are respectively provided at four corners inside the frame (1), characterized in that: A group of elastic rings (3) are respectively provided on the left and right sides of the interior of the frame (1), and a filter screen (4) is provided on the inner wall of the elastic ring (3). An expansion ring (5) is provided in the middle of the elastic ring (3), the outer surface of which is in frictional contact with the inner wall of the frame (1). A piston component (6) is provided at the side end of the frame (1), and a sealed chamber is formed inside the frame (1) through the piston component (6), and the sealed chamber is connected to the expansion ring (5) through a guide hose (9) provided on the frame (1), and the piston component (6) One end of the filter (4) is elastically connected to the frame (1) through an elastic member (8) disposed inside the frame (1), and at the initial stage, the piston member (6) protrudes out of the side end of the frame (1) under the elastic force of the elastic member (8), a second flow guide hole (12) penetrating left and right is provided in the middle of the filter (4), a pressing diaphragm (10) is provided in the middle of the frame (1), and a flow groove (11) connected to the first flow guide hole (2) is provided inside the frame (1) and between the filter (4) and the pressing diaphragm (10).

2. The composite filter cloth deslagging filter press according to claim 1, characterized in that: A steel wire rope (7) is provided in the middle of one end of the piston component (6), and is fixedly connected to the top of one side of the elastic ring (3) via the steel wire rope (7).

3. The composite filter cloth deslagging filter press according to claim 2, characterized in that: The elastic expansion amount of the inner end of the expansion ring (5) is greater than the elastic expansion amount of the outer end thereof.

4. The composite filter cloth deslagging filter press according to claim 3, characterized in that: A rubber gasket with an annular structure is provided inside the frame (1) at a position corresponding to the expansion ring (5), and the trajectory of the inner wall of the rubber gasket is matched with the outer surface of the expansion ring (5).

5. The composite filter cloth deslagging filter press according to claim 4, characterized in that: The inner cavity of the expansion ring (5) is filled with an inert gas, thereby reducing the problem of poor sealing performance between the expansion ring (5) and the frame (1) due to thermal expansion and contraction changes.

6. The composite filter cloth deslagging filter press according to claim 5, characterized in that: The ends of the first guide hole (2) and the second guide hole (12) are respectively provided with a group of elastic washers protruding from the side ends of the frame (1).

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