Membrane plate surface runner of double-membrane filter plate

Abstract

The utility model discloses a diaphragm plate surface flow channel of a double-diaphragm filter plate, which comprises a diaphragm piece and is characterized in that a radial flow channel, an annular flow channel and a crossed flow channel are arranged on the surface of the diaphragm piece; and the radial flow channels radially extend outwards from the centers of the diaphragm pieces and are concentrically staggered with the annular flow channels. According to the utility model, the radial flow channels, the annular flow channels and the crossed flow channels form a multi-stage shunting network, so that the redundancy of a filtrate path is greatly increased, the system failure caused by blockage of a single flow channel is avoided, and the grid design of the crossed flow channels further disperses the flowing direction of filtrate, reduces the deposition probability of particulate matters and improves the filtering efficiency. The annular flow channels are symmetrically distributed around the center of the filter plate and are matched with the radial guide of the radial flow channels, so that filtrate is uniformly diffused to the surface of the whole membrane plate, local accumulated liquid is eliminated, the flow velocity is more uniform, a turbulence effect is formed at intersections of the radial flow channels and the crossed flow channels, the scouring force on the edges and corners of a filter cake is enhanced, and sludge residues are reduced; the washing capacity is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm filter plate technology, and in particular to a flow channel on the surface of a double diaphragm filter plate. Background Technology

[0002] The flow channels on the membrane plate surface refer to the channel structures with a certain shape and direction designed on the surface of the membrane of the double diaphragm filter plate. Their main function is to provide a path for the discharge of filtrate, so that the filtrate separated from the filter cake during the filtration process can smoothly converge along these channels to the liquid outlet of the filter plate, thereby realizing the discharge of liquid after solid-liquid separation. At the same time, the design of the flow channels also helps to evenly distribute the filtrate, avoid local liquid accumulation or uneven flow rate, and improve filtration efficiency and effect. The design of the flow channels on the membrane plate surface directly affects the discharge efficiency of filtrate and the dewatering effect of filter cake.

[0003] Existing technologies have the following problems:

[0004] After extensive searching, it was found that the patent document with application number CN201920144033.1 discloses a diaphragm filter plate that can discharge sewage on its own. This patent uses the special spiral flow channel design of the internal liner plate to form a vortex flow in the flow channel on the surface of the liner plate, which increases the flushing of sludge deposited on the surface of the liner plate.

[0005] However, the aforementioned patents still have some problems in actual use. The most obvious problem is that, due to the single path and large curvature of the spiral flow channel, particulate matter in the filtrate is easily deposited in the flow channel. Especially when processing high-viscosity or fibrous materials, frequent clogging leads to increased maintenance costs. In addition, the spiral structure causes large differences in the flow velocity of the filtrate in different areas of the flow channel, resulting in serious local liquid accumulation, which reduces filtration efficiency. Furthermore, the vortex only acts on the central area of ​​the flow channel, and the sludge at the edges and corners is difficult to remove completely. Long-term accumulation affects the life of the filter plate. Secondly, the flow channel design has poor adaptability to material characteristics, such as particle size and concentration, requiring frequent adjustments to process parameters and increasing operational complexity.

[0006] To address these shortcomings, we propose a flow channel design for the membrane surface of a double-diaphragm filter plate. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flow channel on the surface of a double diaphragm filter plate.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a flow channel on the surface of a double diaphragm filter plate, comprising a diaphragm sheet, characterized in that the surface of the diaphragm sheet is provided with radial flow channels, annular flow channels and cross flow channels;

[0009] The radial flow channels extend outward from the center of the diaphragm and are arranged concentrically and alternately with the annular flow channels.

[0010] The intersecting channels are distributed in a grid pattern between the radial and annular channels, and the three are connected to form a multi-level flow guiding network.

[0011] Preferably, the depth of the radial flow channel gradually decreases from the center to the outer edge, and its cross-section is a trapezoidal structure.

[0012] Preferably, the annular flow channel has several layers.

[0013] Preferably, the diaphragm sheet has a press water inlet pipe and a press water outlet detection pipe on its side wall, both of which are connected to the radial flow channel.

[0014] Preferably, a drain pipe is provided on the bottom surface of the diaphragm, and a valve is provided on the drain pipe.

[0015] Preferably, the surfaces of the radial flow channels, annular flow channels, and cross flow channels are coated with a wear-resistant coating.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, by setting radial flow channels, forming a multi-level flow distribution network with annular and intersecting flow channels, the redundancy of the filtrate path is greatly increased, avoiding system failure caused by blockage of a single flow channel. The grid design of the intersecting flow channels further disperses the filtrate flow direction and reduces the probability of particulate matter deposition. The annular flow channels are symmetrically distributed around the center of the filter plate, and with the radial guidance of the radial flow channels, the filtrate is evenly diffused to the entire membrane plate surface, eliminating local liquid accumulation and making the flow velocity more uniform. Furthermore, the intersection of the radial flow channels and the intersecting flow channels forms a turbulence effect, which enhances the scouring force on the edges and corners of the filter cake, reduces sludge residue, and strengthens the scouring ability.

[0018] 2. In this utility model, the multi-channel combination design can automatically adjust the filtrate distribution path according to the material characteristics, eliminating the need for frequent adjustments to process parameters, reducing operational difficulty, and the optimization of the channel structure reduces mechanical stress concentration. At the same time, uniform filtrate discharge reduces membrane fatigue damage and improves overall service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the flow channel structure on the membrane surface of a double-diaphragm filter plate proposed in this utility model;

[0021] Figure 2 This is a side view of the flow channel on the surface of a double diaphragm filter plate according to the present invention.

[0022] Figure 3 for Figure 1 An enlarged diagram of A in the diagram.

[0023] Legend:

[0024] 1. Diaphragm sheet; 2. Pressed water inlet pipe; 3. Pressed water outlet detection pipe; 4. Valve; 5. Radial flow channel; 6. Annular flow channel; 7. Cross flow channel. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] Please refer to Figure 1-3 A flow channel on the surface of a double diaphragm filter plate includes a diaphragm sheet 1, characterized in that the surface of the diaphragm sheet 1 is provided with radial flow channels 5, annular flow channels 6 and cross flow channels 7;

[0028] The radial flow channel 5 extends outward from the center of the diaphragm 1 and is arranged concentrically and alternately with the annular flow channel 6.

[0029] The intersecting channels 7 are distributed in a grid pattern between the radial channels 5 and the annular channels 6, and the three are connected to form a multi-level flow guiding network.

[0030] By setting radial flow channels 5, forming a multi-level flow distribution network with annular flow channels 6 and cross flow channels 7, the redundancy of the filtrate path is greatly increased, avoiding system failure caused by blockage of a single flow channel. The grid design of the cross flow channels 7 further disperses the filtrate flow direction, reducing the probability of particulate matter deposition. The annular flow channels 6 are symmetrically distributed around the center of the filter plate, and together with the radial guidance of the radial flow channels 5, the filtrate is evenly diffused to the entire membrane plate surface, eliminating local liquid accumulation and making the flow velocity more uniform. Furthermore, the intersection of the radial flow channels 5 and the cross flow channels 7 forms a turbulence effect, enhancing the scouring force on the edges and corners of the filter cake, reducing sludge residue, and strengthening the scouring capacity. The multi-flow channel combination design can automatically adjust the filtrate distribution path according to the material characteristics, eliminating the need for frequent adjustments to process parameters, reducing the difficulty of operation. The optimization of the flow channel structure reduces mechanical stress concentration, while uniform filtrate discharge reduces membrane fatigue damage and improves the overall service life.

[0031] In this implementation scheme: the depth of the radial flow channel 5 gradually decreases from the center to the outer edge, and its cross-section is a trapezoidal structure.

[0032] Specifically, the flow path is deeper in the center and shallower at the outer edge. By utilizing fluid dynamics principles, the flow velocity and scouring force of the filtrate are balanced. Through the gradient change in the depth of the flow channel and the trapezoidal cross-section design, the flow efficiency of the filtrate is optimized and the risk of flow channel wear is reduced.

[0033] In this implementation plan: the annular flow channel 6 is provided with several layers.

[0034] Specifically, the annular flow channel 6 can be configured with 2-4 layers of annular flow channels to guide the flow in layers, adapting to filtrates of different viscosities and improving the flow channel's adaptability to different materials.

[0035] In this implementation scheme: the side wall of the diaphragm sheet 1 is provided with a press water inlet pipe 2 and a press water outlet detection pipe 3, both of which are connected to the radial flow channel 5.

[0036] Specifically, the pressing water system is integrated with the flow channel structure to simplify the external pipeline layout and improve pressing efficiency.

[0037] In this implementation scheme: a drain pipe is provided on the bottom surface of the diaphragm 1, and a valve 4 is provided on the drain pipe.

[0038] Specifically, valve 4 controls the flow of pressing water.

[0039] In this implementation scheme, the surfaces of the radial flow channel 5, the annular flow channel 6, and the cross flow channel 7 are coated with a wear-resistant coating.

[0040] Specifically, the wear-resistant coating uses polytetrafluoroethylene (PTFE) wear-resistant coating. Through surface modification technology, it significantly reduces the flow channel wear rate, resists acid and alkali corrosion, extends the service life of the flow channel, and reduces the maintenance frequency.

[0041] Working Principle: During operation, the radial flow channels 5, together with the annular flow channels 6 and the cross flow channels 7, form a multi-level flow distribution network, significantly increasing the redundancy of the filtrate path and preventing system failure caused by blockage of a single flow channel. The grid design of the cross flow channels 7 further disperses the filtrate flow direction, reducing the probability of particulate matter deposition. The annular flow channels 6 are symmetrically distributed around the center of the filter plate, and together with the radial guidance of the radial flow channels 5, the filtrate is evenly diffused to the entire membrane plate surface, eliminating local liquid accumulation and resulting in a more uniform flow rate. Furthermore, the intersection of the radial flow channels 5 and the cross flow channels 7 creates a turbulent effect, enhancing the scouring force on the edges and corners of the filter cake, reducing sludge residue, and strengthening the scouring capacity. The multi-channel combination design can automatically adjust the filtrate distribution path according to the material characteristics, eliminating the need for frequent adjustments to process parameters, reducing operational difficulty. The optimized flow channel structure reduces mechanical stress concentration, while uniform filtrate discharge reduces membrane fatigue damage and improves overall service life.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A membrane plate surface flow channel of a double diaphragm filter plate, comprising a diaphragm sheet (1), characterized in that, The diaphragm (1) has radial flow channels (5), annular flow channels (6) and cross flow channels (7) on its surface; The radial flow channel (5) extends outward from the center of the diaphragm (1) and is arranged concentrically with the annular flow channel (6); The cross channels (7) are distributed in a grid pattern between the radial channels (5) and the annular channels (6), and the three are connected to form a multi-level flow guiding network.

2. The membrane surface flow channel of a dual-membrane filter plate according to claim 1, characterized in that, The depth of the radial flow channel (5) gradually decreases from the center to the outer edge, and its cross-section is a trapezoidal structure.

3. The membrane surface flow channel of a dual-membrane filter plate according to claim 1, wherein, The annular flow channel (6) has several layers.

4. The membrane surface flow channel of a dual-membrane filter plate according to claim 1, wherein, The diaphragm (1) has a press water inlet pipe (2) and a press water outlet detection pipe (3) on its side wall, both of which are connected to the radial flow channel (5).

5. The membrane surface flow channel of a dual-membrane filter plate according to claim 1, wherein, The bottom surface of the diaphragm (1) is provided with a drain pipe, and a valve (4) is provided on the drain pipe.

6. The membrane surface flow channel of a dual-membrane filter plate according to claim 1, wherein, The surfaces of the radial flow channels (5), annular flow channels (6) and cross flow channels (7) are coated with a wear-resistant coating.

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