Composite filter cloth deslagging filter press

Abstract

The invention relates to the technical field of filter presses and discloses a composite filter cloth deslagging filter press which comprises a frame, a first flow guide hole is formed in the frame, the left side and the right side of the interior of the frame are each provided with a set of elastic rings, and filter screens are arranged on the inner side walls of the elastic rings. An expansion ring with the outer surface in friction contact with the inner wall of the frame is arranged in the middle of the elastic ring, a piston component is arranged at the side end of the frame, the piston component protrudes out of the side end of the frame under the elastic force effect of an elastic piece at the beginning, and a squeezing diaphragm is arranged in the middle of the frame. According to the composite filter cloth deslagging filter press, an elastic ring, a piston component and a linkage structure among the elastic ring and the piston component are arranged, deformation of a filter screen when the filter screen is extruded can be compensated through elastic deformation of an expansion ring, so that the filter screen is not prone to being damaged due to excessive deformation when the filter screen is extruded, the service life of the filter screen is effectively prolonged, and the service life of the filter screen is prolonged. And the filtering and dewatering efficiency on sewage and sludge is relatively high.

Description

Technical Field

[0001] The present application relates to the technical field of filter presses, and particularly 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; However, the filter screen structure on the existing filter press is subjected to the forward extrusion of sewage and sludge during filtration, and the reverse extrusion of 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 unloading 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.

[0003] 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

[0004] 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 unloading process.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a composite filter cloth deslagging filter press, comprising a filtering mechanism movably mounted on a frame for filtering and dehydrating sewage sludge, the filtering mechanism being composed of a plurality of groups of frames combined in a linear array, and a filtering chamber being formed between two adjacent groups of frames, a group of first guide holes for circulating filtrate are respectively provided at the four corners inside the frame, and a plurality of groups of frames can form a circulation pipeline to discharge the filtrate when they are squeezed together mechanically or hydraulically, a group of elastic rings are respectively provided on the left and right sides inside the frame, and a plurality of elastic rings are provided on the left and right sides of the frame, and a plurality of elastic rings are provided on the left and right sides of the frame, and a plurality of elastic rings are provided on the right and left sides of the frame, and a plurality of elastic rings are provided on the left and right ... A filter screen for filtering and dehydrating operations is arranged on the inner wall, and an expansion ring is arranged in the middle of the elastic ring, whose outer surface is in frictional contact with the inner wall of the frame, so as to prevent sewage sludge from entering the inner cavity of the frame, and four groups of piston components arranged in a ring array are arranged on the side end of the frame, and a sealed chamber is formed inside the frame through the piston components, and the sealed chamber is connected with the expansion ring through a guide hose arranged on the frame, so that the deformation of the filter screen when it is squeezed can be compensated by the elastic deformation of the expansion ring, so that the filter screen is not easily damaged due to excessive deformation when it is squeezed, and at the same time, it can The sealing performance between the elastic ring and the frame is further improved by increasing the filling amount of gas in the expansion ring, and one end of the piston member is elastically connected to the frame through an elastic member arranged inside the frame, and at the beginning, the piston member protrudes from the side end of the frame under the elastic force of the elastic member, and then when several groups of frames are squeezed together, the piston member can be squeezed and forced to move inward to compress the elastic member and replenish the gas filling amount in the inner cavity of the expansion ring, and the middle part of the filter screen is provided with a second guide hole for circulating sewage sludge, and several groups of frames are squeezed together mechanically or hydraulically. When together, a circulation pipeline can be formed to transport sewage sludge to the filter chamber formed by the frame, and a squeezing diaphragm for squeezing and dehydrating the filter residue is provided in the middle of the frame. The interior of the squeezing diaphragm is connected to the external air pressure pump station through a pipeline, and then after the filter screen completes filtering the sewage sludge, the gas can be transported to the squeezing diaphragm to expand it, and squeeze the filter residue filtered by the filter screen to dehydrate it. A circulation groove connected to the first guide hole is provided inside the frame and between the filter screen and the squeezing diaphragm, and the filtrate can be transported to the first guide hole through the circulation groove and discharged.

[0006] Furthermore, a steel wire rope is provided in the middle of one end of the piston component, 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, the piston component moves outward under the elastic force of the elastic member to transport part of the gas in the expansion ring to the closed chamber to reduce the mutual friction between the expansion ring and the frame. At the same time, under the transmission action of the steel wire rope, the top end of the elastic ring can be driven to move inward and flipped inward to drive the filter screen to vibrate, thereby shaking off the filter residue attached to the filter screen.

[0007] Furthermore, the elastic expansion amount of the inner end of the expansion ring is greater than the elastic expansion amount of the outer end thereof. Therefore, when the piston member is squeezed and moves inward, the expansion amount of the inner side of the expansion ring is greater than the expansion amount of the outer side, and the elastic ring is forced to flip outward, so that the elastic ring and the filter screen thereon return to their initial positions to filter the sewage sludge transported by the second guide hole.

[0008] Furthermore, a rubber gasket with an annular structure is provided inside the frame and at a position corresponding to the expansion ring, and the trajectory of the inner wall of the rubber gasket is adapted to the outer surface of the expansion ring, thereby effectively improving the relative sealing between the expansion ring and the frame, making it difficult for sewage sludge, filtered water or filter residue to enter the interior of the frame.

[0009] Furthermore, the inner cavity of the expansion ring is filled with a full volume of inert gas, which can effectively reduce the problem of poor sealing between the expansion ring and the frame due to thermal expansion and contraction changes, making the filtering mechanism more adaptable to the working environment.

[0010] Furthermore, a group of elastic gaskets protruding from the side ends of the frame are respectively provided at the ends of the first guide hole and the second guide hole, so that when several groups of frames are squeezed and overlapped with each other, the sealing of the flow pipeline formed by the first guide holes and the second guide holes on the several groups of frames can be effectively improved, so that the filtered water or sewage sludge flowing therethrough is not prone to leakage.

[0011] The beneficial effects of the present invention are as follows: The present application provides a composite filter cloth deslagging filter press, in which the elastic ring, the piston member and the linkage structure therebetween are arranged, and the deformation of the filter screen when squeezed can be compensated by the elastic deformation of the expansion ring, so that the filter screen is not easily damaged by excessive deformation when squeezed, so as to effectively extend the service life of the filter screen, and when several groups of frames are separated from each other and the filter residue is removed, the elastic force of the elastic member and the transmission action of the wire rope can drive the top end of the elastic ring to move inward and flip it inward to drive the filter screen to vibrate, thereby shaking off the filter residue attached to the filter screen, so as to make it more efficient in filtering and dehydrating sewage sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 The structure of the present invention Figure 1 A magnified schematic diagram of point A; Figure 3 It is a schematic diagram of the structural elastic ring of the present invention; Figure 4 The structure of the present invention Figure 1 A partial front view of Figure 5 A partial cross-sectional view of the structure of the present invention; Figure 6 The structure of the present invention Figure 5 An enlarged schematic diagram of point B; Figure 7 The structure of the present invention Figure 5 Partial front view of .

[0013] In the figure: 1-frame, 2-first guide hole, 3-elastic ring, 4-filter, 5-expansion ring, 6-piston member, 7-wire rope, 8-elastic member, 9-guide hose, 10-squeezing diaphragm, 11-circulation groove, 12-second guide hole. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] like Figure 1-Figure 4As shown, a composite filter cloth deslagging filter press comprises a filtering mechanism movably mounted on a frame for filtering and dehydrating sewage sludge, the filtering mechanism is composed of a plurality of frames 1 combined in a linear array, and a filtering chamber is formed between two adjacent frames 1, a group of first guide holes 2 for circulating filtrate are respectively provided at four corners inside the frame 1, and a plurality of frames 1 can form a circulation pipeline to discharge the filtrate when they are squeezed together mechanically or hydraulically, a group of elastic rings 3 are respectively provided on the left and right sides inside the frame 1, and a filter screen 4 for filtering and dehydrating operations is provided on the inner side wall of the elastic ring 3, an expansion ring 5 whose outer surface is in frictional contact with the inner wall of the frame 1 is provided in the middle part of the elastic ring 3, and the expansion ring 5 is used to prevent sewage sludge from entering the inner cavity of the frame 1, and four groups of piston components 6 arranged in a ring array are provided on the side end of the frame 1, and a sealed chamber is formed inside the frame 1 by the piston component 6, and the sealed chamber is formed by the piston component 6 arranged on the frame 1 The guide hose 9 on the expansion ring 5 is connected with the expansion ring 5, and the elastic deformation of the expansion ring 5 can compensate for the deformation of the filter screen 4 when it is squeezed, so that the filter screen 4 is not easily damaged due to excessive deformation when it is squeezed. At the same time, the sealing between the elastic ring 3 and the frame 1 can be further improved by increasing the filling amount of gas in the expansion ring 5, and one end of the piston member 6 is elastically connected with the frame 1 through an elastic member 8 arranged inside the frame 1, and at the beginning, the piston member 6 protrudes from the side end of the frame 1 under the elastic force of the elastic member 8, and then when several groups of frames 1 are squeezed together, the piston member 6 can be squeezed and forced to move inward to compress the elastic member 8 and replenish the gas filling amount in the inner cavity of the expansion ring 5. The middle part of the filter screen 4 is provided with a second guide hole 12 that runs through the left and right sides for circulating sewage sludge, and when several groups of frames 1 are squeezed together mechanically or hydraulically, a circulation pipeline can be formed to transport sewage sludge to the filter chamber formed by the frame 1, such as Figure 7 As shown, a squeezing diaphragm 10 for squeezing and dehydrating the filter residue is provided in the middle of the frame 1, and the interior of the squeezing diaphragm 10 is connected to the external air pressure pump station through a pipeline, and then after the filter screen 4 completes the filtration of the sewage sludge, the gas can be transported to the squeezing diaphragm 10 to expand it, and squeeze the filter residue filtered by the filter screen 4 to dehydrate it, and a flow groove 11 connected to the first guide hole 2 is provided inside the frame 1 and between the filter screen 4 and the squeezing diaphragm 10, and then the filtrate can be transported to the first guide hole 2 through the flow groove 11 and discharged.

[0016] like Figure 5-Figure 7As shown, in the present 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 a plurality of groups of frames 1 are separated from each other and the filter residue is removed, the piston member 6 moves outward under the elastic force of the elastic member 8 to transport part of the gas in the expansion ring 5 to the closed chamber to reduce the mutual friction between the expansion ring 5 and the frame 1. At the same time, under the transmission action of the steel wire rope 7, the top end of the elastic ring 3 can be driven to move inward and flipped inward to drive the filter screen 4 to vibrate, thereby shaking off the filter residue attached to the filter screen 4.

[0017] like Figure 1-Figure 3 As shown, in the present technical solution, 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, and thus when the piston member 6 is squeezed and moves inward, the elastic ring 3 is forced to flip outward because the expansion amount of the inner side of the expansion ring 5 is greater than the expansion amount of the outer side, so that the elastic ring 3 and the filter screen 4 thereon return to their initial positions to filter the sewage sludge transported by the second guide hole 12.

[0018] like Figure 2 As shown, in the present technical solution, a rubber gasket with an annular structure is provided inside the frame 1 and at a position corresponding to the expansion ring 5, and the trajectory of the inner wall of the rubber gasket is adapted to the outer surface of the expansion ring 5, thereby effectively improving the relative sealing between the expansion ring 5 and the frame 1, making it difficult for sewage sludge, filtered water or filter residue to enter the interior of the frame 1.

[0019] In the present technical solution, the inner cavity of the expansion ring 5 is filled with a full volume of inert gas, which can effectively reduce the deterioration of the sealing between the expansion ring 5 and the frame 1 due to thermal expansion and contraction changes, making the filtering mechanism more adaptable to the working environment.

[0020] like Figure 1 , Figure 4 as well as Figure 7 As shown, in the present technical solution, a group of elastic washers protruding from the side ends of the frame 1 are respectively provided at the ends of the first guide hole 2 and the second guide hole 12, so that when several groups of frames 1 are squeezed and overlapped with each other, the sealing of the flow pipeline formed by the first guide holes 2 and the second guide holes 12 on the several groups of frames 1 can be effectively improved, so that the filtered water or sewage sludge flowing therethrough is not easy to leak.

[0021] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to 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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