Diatomite-based electrolyte filtering system

Abstract

The utility model relates to the technical field of electrolytic copper foils, in particular to a diatomite-based electrolyte filtering system which comprises a dirty liquid tank, a clean liquid tank and a diatomite filter, and further comprises a dirty liquid pump and a material barrel for containing diatomite, and a barrel body with an opening in the upper end is arranged at the bottom of the dirty liquid tank; the material barrel is communicated with the barrel body through a pipeline, the pipeline extends into the lower portion of the barrel body, the lower portion of the barrel body is communicated with the dirty liquid pump through a pipeline, and the dirty liquid pump is communicated with the liquid inlet end of the kieselguhr filter through a liquid inlet pipeline. The liquid outlet end of the diatomite filter is connected with a liquid return pipeline communicated with the dirty liquid tank and a clean liquid pipeline communicated with the clean liquid tank. The problems that in the prior art, after a diatomite filter completes diatomite coating operation, when a coating pipeline is switched to a filtering pipeline, in order to guarantee stable pressure in the diatomite filter, frequency rising of a soiling solution pump and frequency lowering of a coating pump need to be conducted at the same time, and time and labor are wasted during operation are solved.

Description

Technical Field

[0001] This application relates to the field of electrolytic copper foil technology, specifically to an electrolyte filtration system based on diatomaceous earth. Background Technology

[0002] Copper dissolution is the first step in the production of electrolytic copper foil, and the cleanliness of the solution plays a decisive role in the smooth progress of production and the stability of product quality. Diatomaceous earth filters can effectively remove suspended particles, colloids, and other impurities from the electrolyte, improving the cleanliness of the solution and providing a high-quality electrolyte for subsequent electrolysis processes. Therefore, in the electrolytic copper foil industry, diatomaceous earth filters have become a key piece of equipment to ensure the purity of the electrolyte, removing a large amount of dust, particulate matter, and most residual additives and organic matter from the electrolyte.

[0003] Diatomaceous earth filters use diatomaceous earth as the filter medium. Relying on the tiny size and porous structure of diatomaceous earth particles, they adsorb and filter impurities in the solution. During the filtration process, particulate matter in the wastewater is captured by the micropores and capillaries on the surface of the diatomaceous earth, thereby achieving the purpose of purification.

[0004] Before using a diatomaceous earth filter, a diatomaceous earth coating process is required. The traditional process involves mixing diatomaceous earth with pure water to form a diatomaceous earth slurry, which is then pumped into the filter using a coating pump. The diatomaceous earth remains on the filter element's surface as it passes through, forming a filter layer. During the coating process, water returns to the coating tank through the filter. After coating, when switching the coating line to the filter line, the wastewater pump needs to be started at a low frequency. While ensuring stable pressure within the diatomaceous earth filter, the frequency of both the wastewater pump and the coating pump needs to be increased and decreased simultaneously until the wastewater pump is fully engaged (unstable pressure within the filter can cause diatomaceous earth detachment). Then, the coating pump is stopped. After switching pumps, the valves on both the coating and filter lines need to be adjusted to ensure the diatomaceous earth filter is ready for operation. This process is time-consuming and labor-intensive. Summary of the Invention

[0005] This application addresses the problem in the prior art where, after completing the diatomaceous earth coating process, switching the coating pipeline to the filtration pipeline requires simultaneously increasing the frequency of the wastewater pump and decreasing the frequency of the coating pump to ensure stable pressure within the diatomaceous earth filter, which is time-consuming and labor-intensive. The application provides a diatomaceous earth-based electrolyte filtration system. The entire coating process and the switching between the coating and filtration pipelines are simple to operate, effectively improving work efficiency. It also prevents diatomaceous earth detachment from the filter, thus ensuring both coating and filtration effectiveness.

[0006] To solve the above problems, the technical solution of this application is:

[0007] An electrolyte filtration system based on diatomaceous earth includes a sludge tank, a clean liquid tank, and a diatomaceous earth filter. It also includes a sludge pump and a material container for holding diatomaceous earth. The sludge tank has a barrel body with an open top at the bottom. The material container is connected to the barrel body via a pipe extending to the lower part of the barrel body. The lower part of the barrel body is connected to the sludge pump via a pipe. The sludge pump is connected to the inlet end of the diatomaceous earth filter via an inlet pipe. The outlet end of the diatomaceous earth filter is connected to a return pipe connected to the sludge tank and a clean liquid pipe connected to the clean liquid tank.

[0008] By adopting the above scheme, a bucket is installed at the bottom of the sludge tank. The bucket is connected to the material bucket containing diatomaceous earth and the sludge pump. This ensures that the diatomaceous earth will not spread around after entering the sludge tank, but will be concentrated in the bucket. This ensures that all the diatomaceous earth entering the sludge tank can be pumped away by the sludge pump and then enter the diatomaceous earth filter. During the process of coating the diatomaceous earth onto the diatomaceous earth filter, the sludge pumped into the diatomaceous earth filter will return to the sludge tank through the return pipe connected to the outlet of the diatomaceous earth filter, realizing the internal circulation of the coating process.

[0009] Meanwhile, due to the opening at the top of the tank, after the diatomaceous earth is pumped out, the sewage pump will continuously pump the sewage in the sewage tank into the diatomaceous earth filter coated with diatomaceous earth for filtration. The filtered liquid is discharged into the clean liquid tank through the clean liquid pipeline connected to the outlet of the diatomaceous earth filter, thereby achieving the filtration of the sewage in the sewage tank.

[0010] The process of coating diatomaceous earth into the filter and filtering the sludge in the sludge tank both use only one pump, the sludge pump. This not only makes the coating process more stable, but also ensures stable pressure inside the filter, thus avoiding the risk of soil detachment.

[0011] Based on the above solution, the present invention can be further improved as follows:

[0012] Optionally, the material tank is connected to the liquid inlet pipeline via a pipeline, and a valve is provided on the pipeline.

[0013] Using the above scheme, the material tank and the liquid inlet pipe are connected by a single pipe. The liquid inlet pipe carries the waste liquid pumped by the waste liquid pump, allowing the waste liquid to enter the material tank and mix with the diatomaceous earth inside. The mixed liquid then enters the tank, effectively avoiding the problem of powdered diatomaceous earth failing to flow efficiently from the material tank to the tank, thus ensuring the efficient transfer and utilization of the diatomaceous earth. After coating is completed, closing the valve cuts off the flow path of the waste liquid into the material tank.

[0014] Optionally, the material bucket has an opening at the top, and the pipeline is connected to the material bucket through the opening at the top.

[0015] Optionally, the material bucket is a cylinder, and the upper part of the bucket wall is connected to a pipeline along the tangential direction.

[0016] Using the above scheme, the material tank is cylindrical, and the connection point between pipe one and the material tank is tangential to the side wall of the material tank. This allows the wastewater entering the material tank through pipe one to flow tangentially into the material tank, causing the wastewater to flow along the inner wall of the material tank. This flushes the inner wall of the material tank, ensuring thorough mixing of the wastewater and diatomaceous earth within the material tank, thus guaranteeing smooth flow of the diatomaceous earth. It also prevents the diatomaceous earth from adhering to the inner wall of the material tank, ensuring that all added diatomaceous earth can smoothly enter the tank (since the amount of diatomaceous earth added is pre-planned, it is necessary to ensure the full utilization of the diatomaceous earth).

[0017] Optionally, the pipe connecting the material bucket to the bucket body extends into the lower part of the bucket body through an opening at the upper end of the bucket body. A connection port is provided on the side wall of the lower part of the bucket body for connecting the pipe connecting the bucket body to the sewage pump. This allows the diatomaceous earth in the material bucket to concentrate in the lower part of the bucket body when it falls into the bucket body, making it less likely to spill out. At the same time, the sewage pump will pump the diatomaceous earth from the lower part of the bucket body, ensuring that all the diatomaceous earth entering the bucket body can be pumped into the diatomaceous earth filter.

[0018] Optionally, the upper end of the barrel is provided with a cover plate. The cover plate does not completely cover the opening at the upper end of the barrel. By setting the cover plate to cover part of the opening at the upper part of the barrel, the diatomaceous earth can be further prevented from spreading out of the barrel.

[0019] Optionally, valves two and three are respectively provided on the return liquid pipeline and the clean liquid pipeline. By opening and closing valves two and three, it is possible to control whether the liquid discharged from the outlet of the diatomaceous earth filter enters the sludge tank or the clean liquid tank, thereby realizing the switching between the coating pipeline and the filtration pipeline. The operation is simple.

[0020] Optionally, a siphon tank is provided between the sewage pump and the tank. The siphon tank is used to provide a stable liquid flow rate for the sewage pump, reduce flow fluctuations during the pumping process, thereby improving the efficiency of diatomaceous earth coating and sewage filtration; at the same time, it avoids the sewage pump from dry suction and ensures that the sewage pump is not damaged.

[0021] Optionally, the lower end of the material bucket is inclined, which helps the diatomaceous earth to flow naturally under gravity, thereby avoiding the accumulation and retention of materials in the bucket and improving the conveying efficiency of the diatomaceous earth.

[0022] Optionally, valve four is provided on the liquid inlet pipeline.

[0023] The beneficial effects of this application through the above technical solution are as follows:

[0024] 1. In this application, a tank is provided at the bottom of the sludge tank. The tank is connected to both the material tank containing diatomaceous earth and the sludge pump. This prevents the diatomaceous earth from spreading after entering the sludge tank and instead concentrates it within the tank. This ensures that all the diatomaceous earth entering the sludge tank is pumped away by the sludge pump and then enters the diatomaceous earth filter for coating. After the diatomaceous earth is pumped out, the sludge enters the tank through the opening at the top. The sludge pump then continuously pumps the sludge from the sludge tank into the diatomaceous earth filter for filtration, thus achieving a normal filtration process. Both the coating process and the filtration process in the sludge tank utilize only the sludge pump, making the coating process more stable and ensuring stable pressure within the filter, thereby avoiding the risk of diatomaceous earth detachment.

[0025] 2. In this application, a pipeline connects the material tank and the liquid inlet pipeline, allowing the waste liquid flowing in the liquid inlet pipeline to enter the material tank and mix with the diatomaceous earth in the tank. The mixed liquid then enters the tank, effectively avoiding the problem that powdered diatomaceous earth cannot effectively enter the tank from the material tank due to poor flow, thus ensuring the efficient transfer and utilization of diatomaceous earth.

[0026] 3. In this application, by installing valve two and valve three on the return liquid pipeline and the clean liquid pipeline respectively, the liquid discharged from the outlet of the diatomaceous earth filter can be controlled to enter the sludge tank or the clean liquid tank by opening and closing valve two and valve three, thereby realizing the switching between the coating pipeline and the filtration pipeline, which is simple to operate. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the present application as Embodiment 1;

[0028] Figure 2 This is a structural schematic diagram of Embodiment 2 of this application;

[0029] Figure 3 This is a structural schematic diagram of Embodiment 3 of this application.

[0030] The attached diagram is labeled as follows: 1 is the sludge tank, 101 is the barrel body, 2 is the diatomaceous earth filter, 3 is the sludge pump, 4 is the material barrel, 5 is the inlet pipe, 6 is the return pipe, 7 is the clean liquid pipe, 8 is pipe one, 9 is valve one, 10 is valve two, 11 is valve three, 12 is valve four, and 13 is the siphon tank. Detailed Implementation

[0031] The present application will be further described below with reference to the accompanying drawings and specific embodiments:

[0032] Example 1:

[0033] like Figure 1 As shown, an electrolyte filtration system based on diatomaceous earth includes a sludge tank 1, a clean liquid tank, and a diatomaceous earth filter 2. It also includes a sludge pump 3 and a material tank 4 for holding diatomaceous earth. The material tank 4 is cylindrical with an inverted conical bottom. The bottom of the sludge tank 1 is welded to a cylindrical barrel 101 with an open top and a hollow interior. The material tank 4 is connected to the barrel 101 by a pipe that extends to the lower part of the barrel 101. The lower part of the barrel 101 is connected to the sludge pump 3 by a pipe. The sludge pump 3 is connected to the inlet end of the diatomaceous earth filter 2 by an inlet pipe 5. The outlet end of the diatomaceous earth filter 2 is connected to a return pipe 6 connected to the sludge tank 1 and a clean liquid pipe 7 connected to the clean liquid tank.

[0034] Specifically, by setting a bucket 101 at the bottom of the sludge tank 1, and connecting the bucket 101 to the material bucket 4 containing diatomaceous earth and the sludge pump 3 respectively, the diatomaceous earth will not spread around after entering the sludge tank 1, but will be concentrated in the bucket 101. This ensures that all the diatomaceous earth entering the sludge tank 1 can be pumped away by the sludge pump 3 and then enter the diatomaceous earth filter 2. During the process of coating the diatomaceous earth onto the diatomaceous earth filter 2, the sludge pumped into the diatomaceous earth filter 2 by the sludge pump 3 will return to the sludge tank 1 through the return pipe 6 connected to the outlet end of the diatomaceous earth filter 2, realizing the internal circulation of the coating process.

[0035] Meanwhile, the opening at the top of the tank 101 allows the sewage pump 3 to continuously pump the sewage in the sewage tank 1 into the diatomaceous earth filter 2 coated with diatomaceous earth after the diatomaceous earth has been pumped out. The filtered liquid is then discharged into the clean liquid tank through the clean liquid pipeline 7 connected to the outlet of the diatomaceous earth filter 2, thereby achieving the filtration of the sewage in the sewage tank 1.

[0036] In this embodiment, the diatomaceous earth filter 2 used is model ZX-110, with a volume of 15000L and a filtration area of ​​110m². 2 The working pressure is 0.2-0.3 MPa, the working temperature is 45-60℃, and the weight is 7000 kg; the sewage pump 3 is driven by a separately installed power source.

[0037] Specifically, the material tank 4 is connected to the liquid inlet pipe 5 through pipe 8. The liquid inlet pipe 5 is filled with sewage pumped by the sewage pump 3, which allows the sewage to enter the material tank 4 and mix with the diatomaceous earth in the tank. The mixed liquid then enters the tank body 101, which can effectively avoid the problem that the powdered diatomaceous earth cannot effectively enter the tank body 101 from the material tank 4 due to poor flow.

[0038] The pipeline 8 is equipped with a valve 9. After the coating is completed, closing the valve 9 will cut off the flow path of the sewage into the material tank 4.

[0039] Specifically, the material bucket 4 has an opening at the top to facilitate the placement of a certain amount of diatomaceous earth inside the material bucket 4, and the pipeline 8 is connected to the material bucket 4 through the opening at the top of the material bucket 4.

[0040] In this example, after the diatomaceous earth in the material bucket 4 is first coated into the diatomaceous earth filter 2, the diatomaceous earth filter 2 can be used for 3 to 6 months. Since the interval between recoating is relatively long, in this embodiment, the top of the material bucket 4 is provided with a cover plate with a central opening to prevent the diatomaceous earth in the material bucket 4 from scattering, and to prevent dust from entering the material bucket 4 when no coating operation is required. The central opening facilitates the insertion of the pipe 8 into the interior of the material bucket 4.

[0041] Specifically, the pipe connecting the material bucket 4 and the bucket body 101 extends into the lower part of the bucket body 101 through the opening at the upper end of the bucket body 101. A connection port is provided on the side wall of the lower part of the bucket body 101 for connecting the pipe connecting the bucket body 101 and the sewage pump 3. This ensures that when the diatomaceous earth in the material bucket falls into the bucket body, it will concentrate in the lower part of the bucket body and will not easily scatter. At the same time, the sewage pump 3 will pump the diatomaceous earth from the lower part of the bucket body 101, ensuring that all the diatomaceous earth entering the bucket body 101 can be pumped into the diatomaceous earth filter 2 by the sewage pump 3.

[0042] Specifically, valve 2 10 and valve 3 11 are respectively installed on the return liquid pipeline 6 and the clean liquid pipeline 7. By opening and closing valve 2 10 and valve 3 11, it is possible to control whether the liquid discharged from the outlet of the diatomaceous earth filter 2 enters the sludge tank 1 or the clean liquid tank, thereby realizing the switching between the coating pipeline and the filtration pipeline. The operation is simple.

[0043] Specifically, a siphon tank 13 is provided between the sewage pump 3 and the tank 101, which can provide a stable liquid flow rate for the sewage pump 3, reduce flow fluctuations during the pumping process, thereby improving the efficiency of diatomaceous earth coating and sewage filtration; at the same time, it avoids the sewage pump 3 from dry suction and ensures that the sewage pump 3 is not damaged.

[0044] Specifically, valve 12 is provided on the liquid inlet pipeline 5.

[0045] In this embodiment, when used:

[0046] First, add a certain amount of diatomaceous earth into the material tank 4. Then, open valve 1 9, valve 2 10 and valve 4 12, and start the siphon tank and sewage pump 3. Under the action of sewage pump 3, some sewage enters the material tank 4 and mixes with the diatomaceous earth in the tank. The mixed liquid enters the tank body 101 and is pumped by sewage pump 3 to the diatomaceous earth filter 2, thereby coating the diatomaceous earth filter 2. The excess sewage will return to the sewage tank 1 through the return pipe 6, and the cycle continues until the coating is completed.

[0047] After coating is completed, close valve 2 10 and open valve 3 11, while closing valve 1 9 at the same time, so that the sewage pumped by sewage pump 3 will no longer enter the material tank 4, but will all enter the diatomaceous earth filter 2 for filtration. The filtered liquid is discharged to the clean liquid tank through the clean liquid pipeline 7, thus realizing the switching between the coating pipeline and the normal filtration pipeline.

[0048] When stopping work, first stop the sewage pump, close all valves, and then drain the liquid from the pipes and siphon tank.

[0049] Example 2:

[0050] The technical solution in this embodiment is the same as that in Embodiment 1, except that:

[0051] like Figure 2 As shown: In this embodiment, the upper end of the barrel 101 is provided with a cover plate. The cover plate does not completely cover the opening at the upper end of the barrel 101. By setting the cover plate to cover part of the opening at the upper part of the barrel, the diatomaceous earth can be further prevented from spreading out of the barrel.

[0052] In this embodiment, in order to ensure the continuous operation of the sewage pump, the size and shape of the cover plate can be designed according to the volume of the sewage tank 1 and the inlet flow rate of the sewage pump 3. It is only necessary to ensure that the sewage flow rate entering the tank 101 through the gap between the cover plate and the tank 101 can guarantee the inlet flow rate of the sewage pump 3.

[0053] Example 3:

[0054] The technical solution in this embodiment is the same as that in embodiment two, except that:

[0055] like Figure 3 As shown, in this embodiment, the upper part of the wall of the material tank 4 is connected to the pipeline 8 along the tangential direction; this allows the sewage entering the material tank 4 from the pipeline 8 to flow along the tangential direction of the wall of the material tank 4, thus flushing the inner wall of the material tank 4. This not only ensures that the sewage and diatomaceous earth are fully mixed in the material tank 4, thus guaranteeing the smooth flow of diatomaceous earth, but also prevents diatomaceous earth from adhering to the inner wall of the material tank 4, thereby ensuring that all added diatomaceous earth can smoothly enter the tank 101.

[0056] In this embodiment, the upper end of the material tank 4 is provided with a fully enclosed cover to prevent the sewage entering the material tank 4 from escaping out of the material tank 4.

[0057] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Any equivalent or similar modifications or substitutions to the technical solutions of this application without departing from the spirit of this application or the scope of disclosure shall fall within the protection scope of this application.

Claims

1. A diatomaceous earth-based electrolyte filtration system, comprising a sludge tank (1), a clean liquid tank, and a diatomaceous earth filter (2), characterized in that, It also includes a sludge pump (3) and a material tank (4) for holding diatomaceous earth. The bottom of the sludge tank (1) is provided with a barrel body (101) with an open top. The material tank (4) is connected to the barrel body (101) through a pipe, and the pipe extends into the lower part of the barrel body (101). The lower part of the barrel body (101) is connected to the sludge pump (3) through a pipe. The sludge pump (3) is connected to the inlet end of the diatomaceous earth filter (2) through an inlet pipe (5). The outlet end of the diatomaceous earth filter (2) is connected to a return pipe (6) connected to the sludge tank (1) and a clean liquid pipe (7) connected to the clean liquid tank.

2. The diatomaceous earth-based electrolyte filtration system according to claim 1, characterized in that, The material tank (4) is connected to the liquid inlet pipe (5) through pipe one (8), and valve one (9) is provided on the pipe one (8).

3. The diatomaceous earth-based electrolyte filtration system according to claim 2, characterized in that, The material bucket (4) has an opening at the top, and the pipeline (8) is connected to the material bucket (4) through the opening at the top.

4. The diatomaceous earth-based electrolyte filtration system according to claim 2, characterized in that, The material bucket (4) is a cylinder, and the upper part of the bucket wall of the material bucket (4) is connected to the pipeline (8) along the tangential direction.

5. The diatomaceous earth-based electrolyte filtration system according to claim 1, characterized in that, The upper end of the barrel (101) is provided with a cover plate, which does not completely cover the opening at the upper end of the barrel (101).

6. The diatomaceous earth-based electrolyte filtration system according to any one of claims 3 to 4, characterized in that, The return liquid pipeline (6) and the clean liquid pipeline (7) are respectively equipped with valve two (10) and valve three (11).

7. The diatomaceous earth-based electrolyte filtration system according to claim 6, characterized in that, A siphon tank (13) is provided between the sewage pump (3) and the tank (101).

8. The diatomaceous earth-based electrolyte filtration system according to claim 6, characterized in that, The lower end of the material bucket (4) is an inclined surface.

9. The diatomaceous earth-based electrolyte filtration system according to claim 6, characterized in that, The liquid inlet pipe (5) is equipped with valve four (12).

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