Circuit board film stripping and filtering system

Abstract

The application discloses a circuit board film stripping and filtering system, which comprises a circuit board film stripping device, a film residue filtering device, a secondary recovery device, a multi-stage filtering device and a chemical liquid circulating device; the film residue filtering device is connected with the circuit board film stripping device to receive the mixture of the chemical liquid and the film residue output by the circuit board film stripping device; the film residue filtering device is used for separating the chemical liquid and the film residue, and conveying the separated chemical liquid to the multi-stage filtering device and the separated film residue to the secondary recovery device; the secondary recovery device is used for separating the chemical liquid remaining on the film residue, and conveying the separated chemical liquid to the multi-stage filtering device; the multi-stage filtering device is used for multiple filtering of the chemical liquid; the chemical liquid circulating device is connected with the multi-stage filtering device and the circuit board film stripping device, and is used for conveying the multiple filtered chemical liquid to the circuit board film stripping device. The application can improve the reutilization rate of the chemical liquid.

Description

Technical Field

[0001] This invention relates to the field of circuit board manufacturing technology, and in particular to a circuit board defilming and filtration system. Background Technology

[0002] In the existing circuit board processing, it is often necessary to use chemicals to remove the film from the circuit board. Usually, the chemical is sprayed on the surface of the circuit board to cause a chemical reaction between the circuit board and the chemical. The unreacted chemical and the film residue produced by the reaction will mix together. In order to improve the utilization rate of the chemical, it is generally separated by a filtration device.

[0003] For example, Chinese invention patent with publication number CN216395479U discloses a wastewater recycling and treatment device for circuit board production. This device can effectively filter out membrane residue in the chemical solution. However, the membrane residue itself still has a lot of chemical solution attached. If the filtered membrane residue is discarded directly, it will lead to the waste of some chemical solution, which reduces the reuse rate of the chemical solution. Summary of the Invention

[0004] This invention provides a circuit board membrane removal filtration system that can improve the reuse rate of chemicals.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] Embodiments of the present invention provide a circuit board membrane stripping filtration system, including a circuit board membrane stripping device, a membrane residue filtration device, a secondary recovery device, a multi-stage filtration device, and a chemical solution circulation device. The membrane residue filtration device is connected to the circuit board membrane stripping device to receive a mixture of chemical solution and membrane residue output from the circuit board membrane stripping device. The membrane residue filtration device is used to separate the chemical solution and membrane residue, and transport the separated chemical solution to the multi-stage filtration device and the separated membrane residue to the secondary recovery device. The secondary recovery device is used to separate the residual chemical solution on the membrane residue and transport the separated chemical solution to the multi-stage filtration device. The multi-stage filtration device is used to perform multiple filtrations on the chemical solution. The chemical solution circulation device is connected to both the multi-stage filtration device and the circuit board membrane stripping device, and is used to transport the multiple-filtered chemical solution to the circuit board membrane stripping device.

[0007] In some embodiments, the membrane sludge filtration device includes a housing, a filter drum, a drive assembly, and a receiving hopper; the filter drum is disposed inside the housing and rotatably connected to the housing, the drive assembly is connected to the filter drum and used to drive the filter drum to rotate; the circumferential surface of the filter drum is provided with a plurality of filter holes penetrating it, and a receiving groove is provided inside the housing, the receiving groove being located below the filter drum for receiving the chemical solution flowing out from the filter holes; the surface of the housing is provided with a membrane sludge outlet, a chemical solution outlet communicating with the receiving groove, and a feed pipe communicating with the inner cavity of the filter drum; the receiving hopper extends into the filter drum for receiving membrane sludge falling from the upper part of the filter drum, the receiving hopper including a discharge section for allowing the membrane sludge to slide out, the discharge section extending out of the housing through the membrane sludge outlet.

[0008] In some embodiments, a plurality of baffles are provided on the inner peripheral wall of the filter roller.

[0009] In some embodiments, a blowing device is provided on the outer side of the filter drum, and the blowing device is located on the top of the filter drum and is used to blow air onto the top of the filter drum.

[0010] In some embodiments, a water spraying device is fixed to the housing, the water spraying device being used to spray water onto the inner wall of the filter drum.

[0011] In some embodiments, the secondary recovery device includes a sedimentation tank, a liquid extraction pipeline, and a first liquid extraction pump. The sedimentation tank is used to receive the membrane sludge separated by the membrane sludge filtration device. One end of the liquid extraction pipeline extends into the sedimentation tank, and the other end is connected to the multi-stage filtration device. The first liquid extraction pump is installed in the liquid extraction pipeline and is used to pump the chemical solution in the sedimentation tank to the multi-stage filtration device.

[0012] In some embodiments, the secondary recovery device further includes a spraying assembly disposed in a sedimentation tank, the spraying assembly being used to spray water onto the inner wall of the sedimentation tank.

[0013] In some embodiments, the device further includes a membrane sludge dewatering device, wherein a dewatering connecting pipe connected to the membrane sludge dewatering device is provided at the bottom of the sedimentation tank, and a control valve is provided in the dewatering connecting pipe; the membrane sludge dewatering device is used to receive the membrane sludge transported through the dewatering connecting pipe and dewater the membrane sludge.

[0014] In some embodiments, the membrane sludge dewatering device includes a dewatering tank, a membrane sludge conveying assembly, a water collection tank, and a collection box; one end of the dewatering tank is connected to a dewatering connecting pipe, and the bottom of the other end is provided with a membrane sludge output pipe; the membrane sludge conveying assembly is disposed in the dewatering tank and is used to convey the membrane sludge in the dewatering tank to the membrane sludge output pipe, and the membrane sludge output pipe is connected to the collection box; the bottom of the dewatering tank is provided with a drain hole, and the water collection tank is located below the dewatering tank.

[0015] In some embodiments, the multi-stage filtration device includes a primary filter and two secondary filters, wherein the primary filter, one of the secondary filters, and the other secondary filter are connected in sequence, and the membrane sludge filtration device and the secondary recovery device are both connected to the primary filter.

[0016] The present invention has at least the following beneficial effects: the membrane sludge filtration device of the present invention can separate the chemical solution and membrane sludge from the mixture of chemical solution and membrane sludge output from the circuit board membrane stripping device; the secondary recovery device further separates the chemical solution remaining on the membrane sludge; the multi-stage filtration device performs multiple filtrations on the chemical solution separated by the membrane sludge filtration device and the secondary recovery device; and the chemical solution circulation device then transports the multi-filtered chemical solution to the circuit board membrane stripping device for recycling. Since the present invention recycles the chemical solution remaining on the separated membrane sludge, it reduces the waste of chemical solution and improves the reuse rate of chemical solution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a circuit board membrane removal filtration system according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a membrane sludge filtration device according to an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A cross-sectional view taken along section line AA.

[0020] Figure 4 This is a schematic diagram of the membrane sludge filtration device according to an embodiment of the present invention after removing part of the outer shell;

[0021] Figure 5 This is a schematic diagram of the membrane sludge filtration device according to an embodiment of the present invention after removing part of the outer shell and the receiving hopper;

[0022] Figure 6 for Figure 5 A schematic diagram of the membrane sludge filtration device shown from another perspective;

[0023] Figure 7 This is a side view schematic diagram of a membrane sludge filtration device, a secondary recovery device, and a membrane sludge dewatering device according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the membrane sludge filtration device and sedimentation tank according to an embodiment of the present invention after the top cover has been removed;

[0025] Figure 9 This is a cross-sectional schematic diagram of a membrane sludge dewatering device according to an embodiment of the present invention;

[0026] Figure 10This is a schematic diagram of the structure of a multi-stage filtration device according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the structure of a chemical circulation device and a circuit board stripping device according to an embodiment of the present invention.

[0028] The attached figures are labeled as follows:

[0029] Circuit board film removal device 10;

[0030] Membrane sludge filtration device 20, outer shell 100, receiving tank 110, bottom plate 111, feed pipe 101, chemical outlet 102, residue outlet 103, support shaft 120, guide wheel 130; filter drum 200, filter hole 201, baffle plate 210; drive assembly 300, gear ring 310; receiving hopper 400, discharge section 410; blowing device 500; water spraying device 600, nozzle 610.

[0031] Secondary recovery device 30, sedimentation tank 31, liquid extraction pipeline 32, spraying assembly 33, dehydration connecting pipe 34, control valve 35;

[0032] Multi-stage filtration device 40, primary filter 41, secondary filter 42, membrane sludge discharge mechanism 43;

[0033] Medicine circulation device 50, circulation tank 51, second liquid pump 52;

[0034] Membrane sludge dewatering device 60, dewatering tank 61, membrane sludge conveying assembly 62, water collection tank 63, collection box 64, membrane sludge output pipe 65. Detailed Implementation

[0035] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0036] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0037] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0038] Embodiments of the present invention provide a circuit board defilming filtration system, such as... Figure 1 As shown, the system includes a circuit board membrane stripping device 10, a membrane residue filtration device 20, a secondary recovery device 30, a multi-stage filtration device 40, and a chemical circulation device 50. The circuit board membrane stripping device 10 sprays chemicals onto the circuit board to strip the membrane. The membrane residue filtration device 20 is connected to the circuit board membrane stripping device 10, which transports the mixture of chemicals and membrane residue after stripping to the membrane residue filtration device 20. The membrane residue filtration device 20 separates the chemicals and membrane residue from the mixture, transporting the separated chemicals to the multi-stage filtration device 40 and the separated membrane residue to the secondary recovery device 30. Since the membrane residue still contains residual chemicals, the secondary recovery device 30 separates the residual chemicals from the membrane residue and transports the separated chemicals to the multi-stage filtration device 40. The multi-stage filtration device 40 performs multiple filtrations on the chemicals separated by the membrane residue filtration device 20 and the secondary recovery device 30, resulting in cleaner chemicals. The chemical circulation device 50 is connected to both the multi-stage filtration device 40 and the circuit board membrane stripping device 10. The chemical circulation device 50 receives the chemical solution after multiple filtrations and then transports it to the circuit board membrane stripping device 10 for recycling. Because this embodiment recycles the residual chemical solution on the separated membrane residue, it reduces chemical waste and improves the chemical reuse rate.

[0039] The specific structure of the membrane sludge filtration device will be described below.

[0040] In some embodiments, such as Figure 2-6 As shown, the membrane residue filtration device includes a housing 100, a filter drum 200, a drive assembly 300, and a receiving hopper 400. The filter drum 200 is disposed inside the housing 100 and rotatably connected to the housing 100. The drive assembly 300 is connected to the filter drum 200 and is used to drive the filter drum 200 to rotate. The circumferential surface of the filter drum 200 is provided with multiple filter holes 201 penetrating through it. The chemical solution can flow out of the filter drum 200 through the filter holes 201, while the residue cannot pass through the filter holes 201 and thus remains in the filter drum 200. A receiving groove 110 is provided inside the housing 100, located below the filter drum 200. The chemical solution flowing out of the filter holes 201 will flow downward under the action of gravity, and the receiving groove 110 can receive the chemical solution flowing out of the filter holes 201.

[0041] The surface of the housing 100 is provided with a residue outlet 103, a liquid outlet 102 communicating with the receiving tank 110, and a feed pipe 101 communicating with the inner cavity of the filter drum 200. The mixture of liquid medicine and residue enters the filter drum 200 through the feed pipe 101. After being filtered by the filter drum 200, the liquid medicine can flow out through the filter holes 201 and then fall into the receiving tank 110, and then flow out from the liquid medicine outlet 102, while the residue remains in the filter drum 200, thus completing the separation of liquid medicine and residue. The liquid medicine flowing out from the liquid medicine outlet 102 can be reused.

[0042] The receiving hopper 400 extends into the filter drum 200. When the drive assembly 300 drives the filter drum 200 to rotate, the residue on the inner wall of the filter drum 200 rotates to the upper part of the filter drum 200. At this position, the filter drum 200 is essentially above the residue. Under the action of gravity, the residue falls from the upper part of the filter drum 200 into the receiving hopper 400, which can catch the residue falling from the upper part of the filter drum 200. Simultaneously, the receiving hopper 400 includes a discharge section 410 for the residue to slide out. The discharge section 410 extends out of the outer casing 100 through the residue outlet 103. When the residue in the receiving hopper 400 moves to the discharge section 410, it can slide along the discharge section 410 to be removed from the filter drum 200. This allows for timely cleaning of the residue in the filter drum 200, reducing the risk of residue clogging the filter holes 201 and ensuring the filtration effect of the entire filtration device.

[0043] In some embodiments, the discharge section 410 may be located at the lowest point of the receiving hopper 400 so that the residue slides to the discharge section 410 by gravity. The discharge section 410 may be an inclined circular tube, an inclined V-shaped plate, or other structures.

[0044] In some embodiments, a plurality of baffles 210 are provided on the inner peripheral wall of the filter drum 200. The baffles 210 serve to prevent residue from sliding down the inner periphery of the filter drum 200. As the residue moves upward along the filter drum 200, the baffles 210 can drive more residue to move upward, so that the residue will fall when it reaches the vicinity of the top position of the filter drum 200, instead of sliding down the inner periphery of the filter drum 200 too early. In this way, more residue will fall into the receiving hopper 400, reducing the residue remaining in the filter drum 200 and improving the cleaning effect of residue.

[0045] In some embodiments, a blowing device 500 is provided on the outer side of the filter drum 200. The blowing device 500 is located on the top of the filter drum 200 and is used to blow air onto the top of the filter drum 200. The airflow blown out by the blowing device 500 can pass through the filter holes 201, thereby blowing off the residue remaining on the inner wall of the top of the filter drum 200. The blown-off residue will fall into the receiving hopper 400, further reducing the residue remaining in the filter drum 200 and improving the cleaning effect of residue.

[0046] In some embodiments, a water spraying device 600 is fixed on the housing 100. The water spraying device 600 is used to spray water onto the inner wall of the filter drum 200, so that the residue on the inner wall of the filter drum 200 is loosened and will not be tightly attached to the inner wall of the filter drum 200. When the residue rotates to the upper part of the filter drum 200, the residue is easier to fall off, further reducing the residue remaining in the filter drum 200 and improving the cleaning effect of the residue.

[0047] Furthermore, the water spraying device 600 includes a water tank, a booster pump, and a nozzle 610, which are connected in sequence. The water tank stores water, and the booster pump is used to pressurize the water and increase the water's force. The water then sprays out through the nozzle 610. The nozzle 610 is fixed to the housing 100 and configured to face the inner wall of the filter drum 200. The water sprayed from the nozzle 610 can act on the inner wall of the filter drum 200 to wash away the residue on the inner wall of the filter drum 200.

[0048] In some embodiments, a plurality of support shafts 120 extending axially along the filter roller 200 are fixed inside the housing 100. Guide wheels 130, rotatable around the support shafts 120, are sleeved on the support shafts 120. The support shafts 120 are distributed around the outer periphery of the filter roller 200, and the guide wheels 130 on the support shafts 120 abut against the outer peripheral wall of the filter roller 200. This structure enables a rotatable connection between the filter roller 200 and the housing 100. The guide wheels 130 provide support for the filter roller 200 and restrict its movement relative to the housing 100 from the outer periphery. When the filter roller 200 rotates, the guide wheels 130 also rotate with it to reduce friction and make the rotation of the filter roller 200 smoother.

[0049] In some embodiments, the drive assembly 300 includes a driver, a gear, and a gear ring 310. The gear ring 310 is annular, and its outer or inner circumference is provided with teeth adapted to the gear. The gear ring 310 is coaxially connected to the filter drum 200, the gear meshes with the gear ring 310, the driver is connected to the gear and is used to drive the gear to rotate, the gear then drives the gear ring 310 to rotate, thereby causing the filter drum 200 to rotate. The driver may be a motor.

[0050] In some embodiments, the housing 100 includes a bottom plate 111 at its bottom and multiple side plates on its sides, the side plates and the bottom plate 111 forming a receiving groove 110. The filter roller 200 is disposed above the bottom plate 111, and the multiple side plates surround the filter roller 200. Even if medicine spills onto the side plates, it will flow down along the side plates into the receiving groove 110, so that the receiving groove 110 can receive more medicine.

[0051] The specific structure of the secondary recycling device will be described below.

[0052] In some embodiments, such as Figure 7-9 As shown, the secondary recovery device includes a sedimentation tank 31, a liquid extraction pipeline 32, and a first liquid extraction pump. The sedimentation tank 31 receives the membrane sludge separated by the membrane sludge filtration device 20. Through sedimentation and stratification, the membrane sludge settles at the bottom of the sedimentation tank 31, while the chemical solution is located above the membrane sludge. One end of the liquid extraction pipeline 32 extends into the sedimentation tank 31, and the other end is connected to the multi-stage filtration device. The first liquid extraction pump is installed in the liquid extraction pipeline 32 and is used to pump the chemical solution in the sedimentation tank 31 to the multi-stage filtration device. Thus, the secondary recovery device of this embodiment can separate the residual chemical solution from the membrane sludge, allowing this chemical solution to be reused.

[0053] In this embodiment, the top of the sedimentation tank 31 may be provided with an opening that connects to the receiving hopper of the above embodiment, so that the membrane residue sliding down from the receiving hopper falls into the sedimentation tank 31.

[0054] Furthermore, the secondary recovery device also includes a spraying assembly 33 installed in the sedimentation tank 31. The spraying assembly 33 is used to spray water onto the inner wall of the sedimentation tank 31. On the one hand, this allows the membrane sludge attached to the inner wall of the sedimentation tank 31 to be washed to the bottom of the sedimentation tank 31, so as to facilitate the deposition of the membrane sludge. On the other hand, if there is too little liquid attached to the membrane sludge, it is not easy to form a stratified structure through deposition. After rinsing the sedimentation tank 31 with water, the amount of liquid can be increased, making it easier to form a stratified liquid above the membrane sludge, which can then be drawn away by the liquid extraction pipeline 32. The diluted liquid can still be extracted through subsequent filtration, refining and other methods.

[0055] In this embodiment, the spraying assembly 33 may include a spraying pipe and a plurality of nozzles fixed on the spraying pipe. The nozzles are arranged facing the inner wall of the sedimentation tank 31 so as to spray water onto the inner wall of the sedimentation tank 31 through the nozzles.

[0056] In some embodiments, such as Figure 1 , Figure 7 and Figure 9As shown, the circuit board membrane removal filtration system also includes a membrane sludge dewatering device 60. A dewatering connecting pipe 34, connected to the membrane sludge dewatering device 60, is located at the bottom of the sedimentation tank 31. A control valve 35 is installed in the dewatering connecting pipe 34. When the control valve 35 is closed, the membrane sludge will not fall into the membrane sludge dewatering device 60 through the dewatering connecting pipe 34. When the control valve 35 is open, the membrane sludge can fall into the membrane sludge dewatering device 60 through the dewatering connecting pipe 34. The membrane sludge dewatering device 60 receives the membrane sludge transported through the dewatering connecting pipe 34 and dewaters it, keeping the membrane sludge dry for subsequent transport or processing.

[0057] Furthermore, the membrane sludge dewatering device 60 includes a dewatering tank 61, a membrane sludge conveying assembly 62, a water collection tank 63, and a collection box 64. One end of the dewatering tank 61 is connected to the dewatering connecting pipe 34, allowing the membrane sludge to fall into the dewatering tank 61 through the dewatering connecting pipe 34. The bottom of the other end of the dewatering tank 61 is provided with a membrane sludge output pipe 65. The membrane sludge conveying assembly 62 is located in the dewatering tank 61 and is used to convey the membrane sludge in the dewatering tank 61 to the membrane sludge output pipe 65. In this way, the membrane sludge can fall out of the dewatering tank 61 through the membrane sludge output pipe 65. The membrane sludge output pipe 65 is connected to the collection box 64, which can collect the membrane sludge. The bottom of the dewatering tank 61 is provided with drainage holes. The water collection tank 63 is located below the dewatering tank 61. During the process of conveying the membrane sludge to the membrane sludge output pipe 65, the water remaining on the membrane sludge can fall down through the drainage holes and drip into the water collection tank 63 for collection. The membrane residue that falls into collection box 64 remains relatively dry.

[0058] In this embodiment, the membrane residue conveying assembly 62 can be a screw conveying assembly.

[0059] In some embodiments, such as Figure 10 As shown, the multi-stage filtration device includes a primary filter 41 and two secondary filters 42. The primary filter 41, one of the secondary filters 42, and the other secondary filter 42 are connected sequentially. A membrane sludge filtration device and a secondary recovery device are both connected to the primary filter 41. The primary filter 41 performs initial filtration of the pharmaceutical solution, removing small particulate residues and keeping the solution clean. The secondary filters 42 can refine the pharmaceutical solution, increasing its concentration. The secondary filters 42 can also remove other impurities from the pharmaceutical solution through reactions, adsorption, and other methods, thus further purifying the solution.

[0060] The multi-stage filtration device may also include a membrane sludge discharge mechanism 43, which is used to discharge the membrane sludge filtered out by the primary filter 41 and the secondary filter 42 to prevent the primary filter 41 and the secondary filter 42 from becoming clogged.

[0061] In some embodiments, such as Figure 11As shown, the medicine circulation device may include a circulation tank 51 and a second pump 52. The output end of the multi-stage filtration device is connected to the circulation tank 51, so that the medicine after multiple filtrations is temporarily stored in the circulation tank 51. The second pump 52 pumps the medicine in the circulation tank 51 to the circuit board film removal device 10 to realize the recycling of the medicine.

[0062] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention. Therefore, those skilled in the art will understand that the foregoing description of various embodiments of the invention is illustrative only and not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A circuit board membrane removal filtration system, characterized in that: The system includes a circuit board membrane stripping device, a membrane residue filtration device, a secondary recovery device, a multi-stage filtration device, and a chemical circulation device. The membrane residue filtration device is connected to the circuit board membrane stripping device to receive the mixture of chemical solution and membrane residue output from the circuit board membrane stripping device. The membrane residue filtration device separates the chemical solution and membrane residue, and transports the separated chemical solution to the multi-stage filtration device and the separated membrane residue to the secondary recovery device. The secondary recovery device separates the residual chemical solution on the membrane residue and transports the separated chemical solution to the multi-stage filtration device. The multi-stage filtration device performs multiple filtrations on the chemical solution. The chemical circulation device is connected to both the multi-stage filtration device and the circuit board membrane stripping device, and is used to transport the multiple-filtered chemical solution to the circuit board membrane stripping device. The secondary recovery device includes a sedimentation tank, a liquid extraction pipeline, and a first liquid extraction pump. The sedimentation tank is used to receive the membrane sludge separated by the membrane sludge filtration device. One end of the liquid extraction pipeline extends into the sedimentation tank, and the other end is connected to the multi-stage filtration device. The first liquid extraction pump is installed in the liquid extraction pipeline and is used to pump the chemical solution in the sedimentation tank to the multi-stage filtration device. The secondary recovery device also includes a spraying assembly installed in the sedimentation tank, which is used to spray water onto the inner wall of the sedimentation tank.

2. The circuit board membrane removal filtration system according to claim 1, characterized in that: The membrane sludge filtration device includes a housing, a filter drum, a drive assembly, and a receiving hopper. The filter drum is disposed inside the housing and rotatably connected to it. The drive assembly is connected to the filter drum and drives it to rotate. The filter drum has multiple filter holes penetrating its circumference. A receiving groove is provided inside the housing, located below the filter drum, to receive the chemical solution flowing out from the filter holes. The surface of the housing has a membrane sludge outlet, a chemical solution outlet communicating with the receiving groove, and a feed pipe communicating with the inner cavity of the filter drum. The receiving hopper extends into the filter drum to receive membrane sludge falling from the upper part of the filter drum. The receiving hopper includes a discharge section for the membrane sludge to slide out, and the discharge section extends out of the housing through the membrane sludge outlet.

3. The circuit board membrane removal filtration system according to claim 2, characterized in that: Multiple baffles are provided on the inner peripheral wall of the filter roller.

4. The circuit board membrane removal filtration system according to claim 2, characterized in that: A blowing device is provided on the outside of the filter drum, and the blowing device is located on the top of the filter drum and is used to blow air onto the top of the filter drum.

5. The circuit board membrane removal filtration system according to claim 2, characterized in that: A water spraying device is fixed on the outer shell, which is used to spray water onto the inner wall of the filter drum.

6. The circuit board membrane removal filtration system according to claim 1, characterized in that: It also includes a membrane sludge dewatering device. The bottom of the sedimentation tank is provided with a dewatering connection pipe connected to the membrane sludge dewatering device, and a control valve is provided in the dewatering connection pipe. The membrane sludge dewatering device is used to receive the membrane sludge transported through the dewatering connection pipe and dewater the membrane sludge.

7. The circuit board membrane removal filtration system according to claim 6, characterized in that: The membrane sludge dewatering device includes a dewatering tank, a membrane sludge conveying assembly, a water collection tank, and a collection box; one end of the dewatering tank is connected to a dewatering connecting pipe, and the bottom of the other end is provided with a membrane sludge output pipe; the membrane sludge conveying assembly is set in the dewatering tank and is used to convey the membrane sludge in the dewatering tank to the membrane sludge output pipe, and the membrane sludge output pipe is connected to the collection box; the bottom of the dewatering tank is provided with a drain hole, and the water collection tank is located below the dewatering tank.

8. The circuit board membrane removal filtration system according to any one of claims 1-5, characterized in that: The multi-stage filtration device includes a primary filter and two secondary filters, with the primary filter, one of the secondary filters, and the other secondary filter connected in sequence. The membrane sludge filtration device and the secondary recovery device are both connected to the primary filter.

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