Double-diaphragm filter plate

Abstract

The utility model relates to the field of filter plates of filter presses, in particular to a double-diaphragm filter plate. The filter plate comprises a plate body, two membranes and a partition plate, first protrusions are arranged on the front face and the rear face of the plate body respectively, the two diaphragms are arranged on the front side and the rear side of the plate body respectively, first grooves corresponding to the first protrusions are formed in the diaphragms, the first protrusions are arranged in the first grooves, the bottom area of the first protrusions is smaller than that of the first grooves, and a water injection channel and a water outlet channel are formed in the left side and the right side of the plate body in a penetrating mode respectively. An external water pipe injects water into a cavity formed by the plate bodies and the membranes through the water injection channel, the partition plates are arranged on one sides of the membranes, and when the filter plate is assembled, the adjacent plate bodies are separated, and meanwhile connection of the membranes and the plate bodies is reinforced. According to the utility model, the plurality of first bulges and first grooves are arranged to divide the space of the cavity formed by the membrane and the plate body, hot water is injected into the cavity to pressurize the local position on the filter plate, the local pressure intensity generated by the divided cavity is higher, and the extrusion effect on a filter cake is better.

Description

Technical Field

[0001] The utility model relates to the field of filter plates of filter presses, and in particular to a double diaphragm filter plate. Background Art

[0002] A double diaphragm filter plate refers to adding a diaphragm layer between the filter plate and the filter cloth. By injecting water with a certain temperature into the diaphragm and the filter plate, the pressure on both sides of the filter cake is increased while the temperature of the environment where the filter cake is located is raised, thereby accelerating the evaporation of water in the filter cake. In traditional double diaphragm filter plates, the diaphragm is in full contact with the filter plate, which not only increases the pressure required for water inlet, but also causes the elastic force to decrease during repeated deformation of the diaphragm. In the long run, the sealing performance between the diaphragm and the filter plate becomes poor, and thus the effect on the filter cake becomes poor. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies and provide a double diaphragm filter plate, which has the advantages of good sealing effect, large extrusion pressure range, and good liquid discharge effect.

[0004] The utility model provides a double diaphragm filter plate, which includes a plate body, two diaphragms and a partition. First protrusions are provided on both the front and back surfaces of the plate body. The two diaphragms are respectively arranged on the front and back sides of the plate body. First grooves corresponding to the first protrusions are provided on the diaphragms. The first protrusions are placed in the first grooves and the bottom area of the first protrusions is smaller than the bottom area of the first grooves. Water injection channels and water outlet channels are respectively provided through the left and right sides of the plate body. An external water pipe injects water into the cavity formed by the plate body and the diaphragm through the water injection channel. The partition is arranged on one side of the diaphragm and separates adjacent plate bodies and strengthens the connection between the diaphragm and the plate body during the assembly of the filter plate.

[0005] Further, sealing grooves are annularly provided on both the front and back surfaces of the plate body, and the edges of the diaphragms on the same side as the sealing grooves are embedded in the corresponding sealing grooves.

[0006] Further, filtrate outlet holes are provided at the four corners of the plate body. A plurality of diversion channels penetrating the surface of the plate body and the filtrate outlet holes are provided on the plate body. A plurality of openings corresponding to the diversion channels are provided at the edge positions on the side of the diaphragm close to the partition. A plurality of convex platforms arranged in parallel are provided on one side of the opening. The separated filtrate enters the diversion channels through the gaps between the convex platforms and the openings, and finally is discharged from the filtrate outlet holes.

[0007] Further, a plurality of convex points are provided on the side of the diaphragm close to the partition.

[0008] Further, the position of the water outlet channel is higher than the position of the water injection channel.

[0009] Further, the diaphragm is made of rubber material.

[0010] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0011] The present utility model provides an integrated layout diaphragm structure, selects a single-hole feeding method, and increases the sealing performance between the diaphragm and the plate body; multiple first protrusions and first grooves are provided to divide the cavity formed between the diaphragm and the plate body. At this time, injecting hot water into the cavity can achieve local pressurization on the filter plate. Compared with overall water injection pressurization of the diaphragm, the local pressure generated by the divided cavity is greater, and the extrusion effect on the filter cake is better; at the same time, the bottom area of the first groove is made smaller than the bottom area of the first protrusion, so that there is a gap between the two protrusions, and the gap is more conducive to the flow of hot water; the protrusions can also expand the telescopic space of the rubber diaphragm and increase the accommodation capacity of the filter plate for the diaphragm; the edge of the diaphragm is embedded in the plate body and cooperates with the partition plate for pressurization, improving the sealing performance of the connection between the diaphragm and the plate body.

[0012] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.

[0013] Undoubtedly, such objects of the present utility model and other objects will become more apparent after the details of the preferred embodiments described below with multiple drawings and illustrations.

[0014] To make the above and other objects, features, and advantages of the present utility model more obvious and understandable, one or several preferred embodiments are specifically given below, and in conjunction with the accompanying drawings shown, the detailed description is as follows. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model.

[0016] In the drawings, the same components are denoted by the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only one or several embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on such drawings.

[0018] Figure 1 It is an exploded view of the overall structure of a double-diaphragm filter plate of the present utility model;

[0019] Figure 2 It is a side cross-sectional view of a double-diaphragm filter plate of the present utility model;

[0020] Figure 3 This is a schematic diagram of the separated state of the plate body and the diaphragm of a double-diaphragm filter plate of the present utility model;

[0021] Figure 4 This is a front view of the combined state of the plate body and the diaphragm of a double-diaphragm filter plate of the present utility model;

[0022] Figure 5 is Figure 4 The partial enlarged view at position A in

[0023] Main reference numeral description:

[0024] Plate body; 11. First protrusion; 12. Sealing groove; 13. Water outlet channel; 14. Water injection channel; 15. Filtrate outlet hole; 16. Diversion channel; 2. Diaphragm; 21. First groove; 22. Boss; 23. Convex point; 24. Opening; 3. Partition board; 4. Gap, 5. Feeder. Specific embodiments

[0025] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, but not to limit the present utility model. After reading the content described in the present utility model, those skilled in the art can make changes and modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0026] Refer to Figures 1-4, the present utility model provides a double diaphragm filter plate, which includes a plate body 1, two diaphragms 2 and a partition plate 3. First protrusions 11 are provided on both the front and back surfaces of the plate body 1. The two diaphragms 2 are respectively arranged on the front and back sides of the plate body 1. Sealing between the diaphragm 2 and the plate body 1 can be achieved by applying pressure on both sides of the partition plate 3 and the plate body 1, or sealing grooves 12 corresponding to the edges of the diaphragm 2 can be provided on the front and back sides of the plate body, and then protrusions that can be embedded in the sealing grooves 12 are provided on the edges of the diaphragm 2. First grooves 21 corresponding to the first protrusions 11 are provided on the diaphragm 2. The first protrusions 11 are placed in the first grooves 21 and the bottom area of the first protrusions 11 is smaller than the bottom area of the first grooves 21, so that a gap 4 is left between the first protrusions 11 and the first grooves 21. The diaphragm 2 is made of rubber material. Water injection channels 14 and water outlet channels 13 are respectively provided through the left and right sides of the plate body 1. The specific positions are: the position of the water outlet channel 13 is higher than the position of the water injection channel 14. An external water pipe injects water into the cavity formed by the plate body 1 and the diaphragm 2 through the water injection channel 14. The partition plate 3 is arranged on one side of the diaphragm 2, separating adjacent plate bodies 1 during the assembly of the filter plate and strengthening the connection between the diaphragm 2 and the plate body 1 at the same time. Adjacent plate bodies 1 share one partition plate 3. The filter plate adopts a structure of feeding in the middle and discharging filtrate at the four corners, and a feeder 5 is provided at the feeding port; filtrate outlet holes 15 are provided at the four corners of the plate body 1. Flow guiding channels 16 communicated with the filtrate outlet holes 15 are provided on both the front and back surfaces of the plate body 1. On the side of the diaphragm 2 close to the partition plate 3, a plurality of openings 24 corresponding to the flow guiding channels 16 are provided at the edge position. On the side of the opening 24 close to the feeder 5, a number of parallel protrusions 22 are provided. Specifically: when the opening 24 is located at the upper side position of the diaphragm 2, the protrusions are located below the opening 24; when the opening 24 is located at the lower side position of the diaphragm 2, the protrusions are located above the opening 24 and the protrusions cover the entire bottom edge of the diaphragm. The separated filtrate enters the flow guiding channels 16 through the gaps between the protrusions 22 and the openings 24, and finally is discharged from the filtrate outlet holes 15. To increase the flow of the filtrate on the diaphragm 2, a plurality of convex points 23 are provided on the side of the diaphragm 2 close to the partition plate 3.

[0027] Working principle: Assemble the filter plate and the filter cloth according to the structure of the filter press, and introduce materials into the middle of the filter plate. At this time, large-particle substances are intercepted by the filter cloth to form filter cakes, and the separated liquid flows from the convex points 23 on the diaphragm 2 to the gaps between the protrusions 22 and the openings 24, and finally flows from the flow guiding channels 16 to the filtrate outlet holes 15; during the pressure filtration process, water at 60°C - 95°C is injected into the water injection channels 14, so that the adjacent first protrusions 11 bulge to apply pressure and heat transfer to the filter cake.

[0028] It should be understood that the embodiments disclosed in the present utility model are not limited to the specific processing steps or materials disclosed here, but should extend to equivalent substitutions of such features understood by those of ordinary skill in the relevant fields. It should also be understood that the terms used herein are only for the purpose of describing specific embodiments and do not mean to limit.

[0029] As used in the specification, "embodiment" means that the specific features or characteristics described in connection with the embodiments are included in at least one embodiment of the present utility model. Therefore, the phrase "embodiment" that appears throughout the specification does not necessarily refer to the same embodiment.

[0030] In addition, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present utility model. However, those skilled in the relevant art will understand that the present utility model can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A double membrane filter plate, characterized in that: It includes a plate body, two diaphragms and a partition. The front and rear surfaces of the plate body are both provided with a first protrusion. The two diaphragms are respectively arranged on the front and rear sides of the plate body. The diaphragm is provided with a first groove corresponding to the first protrusion. The first protrusion is placed in the first groove and its bottom area is smaller than the bottom area of ​​the first groove. The left and right sides of the plate body are respectively penetrated by a water injection channel and a water outlet channel. An external water pipe injects water into the cavity formed by the plate body and the diaphragm through the water injection channel. The partition is arranged on one side of the diaphragm. When the filter plate is assembled, it separates the adjacent plate bodies and reinforces the connection between the diaphragm and the plate body.

2. The double membrane filter plate according to claim 1, characterized in that: The front and rear surfaces of the plate body are both surrounded by sealing grooves, and the edge of the diaphragm on the same side as the sealing groove is embedded in the corresponding sealing groove.

3. The double membrane filter plate according to claim 1, characterized in that: The four corners of the plate body are provided with filtrate outlet holes, the plate body is provided with a plurality of guide channels penetrating the surface of the plate body and the filtrate outlet holes, a side of the membrane close to the partition is provided with a plurality of openings corresponding to the guide channels at its edge position, a plurality of parallelly arranged bosses are provided on one side of the opening, and the separated filtrate enters the guide channel through the gaps between the bosses and the opening, and is finally discharged from the filtrate outlet hole.

4. The double membrane filter plate according to claim 2, characterized in that: The diaphragm is provided with a plurality of convex points on a side close to the partition.

5. The double membrane filter plate according to claim 1, characterized in that: The position of the water outlet channel is higher than that of the water injection channel.

6. The double membrane filter plate according to claim 1, characterized in that: The diaphragm is made of rubber.

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