Self-cleaning type chemical waste solution filtering and purifying device

Abstract

The application belongs to the technical field of solution filtration, and discloses a self-cleaning chemical waste solution filtration and purification device, which comprises a shell and further comprises: a filtration assembly installed in the interior of the shell through a support assembly and used for filtering and purifying chemical waste solvent; and a cleaning assembly arranged in the interior of the shell and used for cleaning the filtration assembly. The device injects cleaning water into the shell, drives the support ring to move downward in the shell, and makes the movable valve ring abut against the inner wall of the lower end guide plate under the action of water pressure, so as to reciprocate the support ring in the shell, extrude the internal cleaning water upward, and impact the surface of the filtration assembly through the guidance of the two guide plates to achieve the cleaning purpose, guarantee the filtration and purification effect of the chemical waste solvent, avoid the maintenance of the filtration system from relying on manual disassembly and cleaning, reduce the operation difficulty and downtime, and further guarantee the utilization rate of the equipment, while reducing the labor cost and safety risk.

Description

Technical Field

[0001] This invention belongs to the field of solution filtration technology, specifically a self-cleaning chemical waste solution filtration and purification device. Background Technology

[0002] Chemical waste solvents refer to organic or inorganic solvents that have lost their original function, become contaminated, or become unusable after use in chemical experiments, industrial production, or other chemical processes. Because these solvents contain hazardous substances or toxicity, they require special treatment in accordance with environmental regulations to avoid harm to the environment and human health. Chemical waste solvents often contain reaction residues (such as catalyst particles, unreacted solid raw materials), dust, or glass shards. Filtration can trap these impurities, preventing them from clogging pipes, damaging pumps and valves, or interfering with subsequent processes (such as distillation or incineration).

[0003] Currently, chemical waste solvent treatment typically employs filtration equipment (such as filter plates, filter cloths, or filter screens) for preliminary solid-liquid separation. However, existing equipment is prone to pore blockage due to continuous accumulation of filter material during operation, significantly increasing filtration resistance and reducing throughput efficiency. Furthermore, the filter cake layer formed on the surface of the filter media further exacerbates the pressure difference increase, affecting the overall treatment efficiency of chemical waste solvents. Moreover, the maintenance of existing filtration systems largely relies on manual disassembly and cleaning, which is not only cumbersome and results in long downtime, but also leads to decreased equipment utilization due to frequent disassembly and assembly, increasing labor costs and safety risks. Therefore, a self-cleaning chemical waste solution filtration and purification device is proposed. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a self-cleaning chemical waste solution filtration and purification device. This solves the problem that the maintenance of existing filtration systems relies heavily on manual disassembly and cleaning, which is not only cumbersome and results in long downtime, but also leads to decreased equipment utilization and increased labor costs and safety risks due to frequent disassembly and assembly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning chemical waste solution filtration and purification device, comprising a housing, and further comprising: A filter assembly, which is installed inside the housing via a support assembly, is used to filter and purify chemical waste solvents; A cleaning component, disposed inside the housing, is used to clean the filter assembly; The cleaning component includes a drive unit fixed to the top of the housing, and the output end of the drive unit is provided with a support ring sleeved on the outside of the filter component. The top and bottom of the support ring are fixed with guide plates through a support frame. The distance between the two guide plates gradually decreases from the outer perimeter to the inner wall; The inner wall of the support ring is provided with an annular groove, and guide rods are arranged in an array in the annular groove. Guide rods are also arranged vertically along the guide rods in the annular groove. Clean water is injected into the housing, and the driving component pushes the support ring downward inside the housing. The movable valve ring adheres to the inner wall of the upper guide plate under the action of water pressure, so that the clean water in the housing enters between the two guide plates through the support ring and the guide plate, and is sprayed out to the filter assembly.

[0006] Preferably, the support assembly includes an upper support member fixed to the top of the housing, a top cover fixed to the top of the upper support member, a lower support member fixed to the bottom of the housing, a drain pipe installed in the middle of the bottom of the lower support member, and a material discharge pipe installed on the lower support member. The top center of the lower support member is recessed.

[0007] Preferably, the outer annular array of the upper support member is provided with guide blocks; The filter assembly includes a movable kit that is movably fitted outside the upper support member, and the movable kit slides vertically by being limited by a guide block.

[0008] Preferably, the bottom of the movable kit is equipped with a connector and an upper docking frame, and the connector and the upper docking frame are movably clamped at the bottom of the connector; The lower support member is fixedly equipped with a lower connecting frame at its top, and a filter cloth body is provided between the upper connecting frame and the lower connecting frame.

[0009] Preferably, a top support plate is provided on the top of the guide plate at the upper end; Initially, the support ring and guide plate are located at the upper end of the housing under the action of the driving component. The filter cloth body is taut by pushing the upper connecting frame through the top support plate.

[0010] Preferably, the driving component pushes the support ring and guide plate downward, the top support plate disengages from the upper docking frame, and the two guide plates move downward to spray cleaning water that impacts the filter cloth body. The filter cloth body is impacted and pulls the upper docking frame and connector, causing the movable kit to move downward along the guide block, so that the filter cloth body is in a relaxed state.

[0011] Preferably, the support assembly further includes a support grid frame installed between the upper support member and the lower support member; When the filter cloth body is in a relaxed state, and is impacted by the cleaning water sprayed out by the two guide plates moving downwards, the filter cloth body gathers inwards to increase the distance with the inner wall of the guide plates, and is supported by the support mesh frame.

[0012] Preferably, a drive assembly is provided inside the housing, the drive assembly including a transmission rod movably disposed inside the housing, and an arc-shaped guide groove is provided on the outside of the transmission rod; The support ring is movably sleeved on the outside of the transmission rod via a connecting pipe, and the inner wall of the connecting pipe is provided with a slider that is movably engaged in the arc-shaped guide groove.

[0013] Preferably, a guide member is fixedly mounted on the upper end of the transmission rod, a limit guide rod is provided on the outside of the guide member, and a docking kit is movably sleeved on the outside of the guide member.

[0014] Preferably, the outside of the docking kit is hinged to the connector via a connecting rod; The downward movement of the support ring drives the transmission rod to rotate via the slider on the inner wall of the connector, and drives the connector, upper connector frame and filter cloth body to rotate via the docking kit and connecting rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention injects clean water into the housing, and a driving component pushes a support ring downward within the housing. As the support ring moves downward, it pushes the clean water within the housing, and the water, under pressure, pushes a movable valve ring upward along a guide rod. The inner wall of the movable valve ring then abuts against the inner wall of the upper guide plate. The pressurized water passes between the lower guide plate and the support ring, and, guided by the movable valve ring, is discharged between the two guide plates. Since the two guide plates are fitted outside the filter assembly, the discharged water impacts the surface of the filter assembly, achieving backwashing. Conversely, when the driving component moves the support ring in the opposite direction, the movable valve ring, under water pressure, abuts against the inner wall of the lower guide plate. This, through the reciprocating motion of the support ring within the housing, squeezes the internal clean water onto the surface of the filter assembly, which is then guided by the two guide plates, achieving cleaning. This ensures the filtration and purification effect of chemical waste solvents, avoids reliance on manual disassembly and cleaning for filtration system maintenance, reduces operational difficulty and downtime, and thus ensures equipment utilization while reducing labor costs and safety risks.

[0016] This invention injects cleaning water into the housing through the top cover. The driving component pushes the support ring and guide plate downward, pushing the cleaning water through the two guide plates and spraying it onto the filter cloth body. The filter cloth body is impacted and contracts inward. At this time, the upper end of the filter cloth body is connected to the upper connecting frame and the connecting piece, causing the movable kit to move downward along the guide block, so that the filter cloth body is in a relaxed state. The fiber gap of the filter cloth body increases, and the cleaning effect of the filter cloth body is improved by the impact force of the cleaning water.

[0017] This invention utilizes a driving component to push the support ring and guide plate downward within the housing. During this process, the support ring moves downward along the transmission rod via the connecting pipe. The transmission rod rotates through the cooperation of the slider on the inner wall of the connecting pipe and the arc-shaped guide groove. The transmission rod then drives the guide component, docking kit, connecting rod, connector, upper docking frame, and filter cloth body to rotate. This prevents the inner wall of the filter cloth body from being impacted by water and ensures constant external contact with the mesh frame, avoiding dead corners and thus improving the cleaning effect of the filter cloth body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the support component and the filter component of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the connection structure between the support component and the filter component of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the support component, filter component, and drive component of the present invention; Figure 7 This is a schematic diagram showing the disassembled structure of the cleaning component and the drive component of the present invention; Figure 8 This is a schematic diagram showing the disassembled structure of the support component and the filter component of the present invention.

[0019] In the diagram: 1. Shell; 3. Support assembly; 31. Top cover; 32. Upper support; 33. Support frame; 34. Lower support; 35. Drain pipe; 36. Discharge pipe; 37. Guide block; 4. Filter assembly; 41. Movable kit; 42. Connector; 43. Upper docking frame; 44. Filter cloth body; 45. Lower docking frame; 5. Cleaning assembly; 51. Drive component; 52. Support ring; 53. Movable valve ring; 54. Support frame; 55. Guide plate; 56. Top support plate; 57. Guide rod; 6. Drive assembly; 61. Guide component; 62. Transmission rod; 63. Docking kit; 64. Connecting rod; 65. Arc-shaped guide groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, the present invention provides a self-cleaning chemical waste solution filtration and purification device, including a housing 1, and further comprising: Filter assembly 4 is installed inside the housing 1 via support assembly 3 and is used to filter and purify chemical waste solvents. Cleaning component 5, which is disposed inside housing 1, is used to clean filter component 4; The cleaning component 5 includes a drive member 51 fixed to the top of the housing 1. The output end of the drive member 51 is provided with a support ring 52 sleeved on the outside of the filter component 4. The top and bottom of the support ring 52 are fixed with guide plates 55 through a support frame 54. The distance between the two guide plates 55 gradually decreases from the outer perimeter to the inner wall; The inner wall of the support ring 52 is provided with an annular groove, and guide rods 57 are arranged in an array in the annular groove. The guide rods 57 are vertically slidably arranged along the guide rods 57 in the annular groove. Clean water is injected into the housing 1. The drive unit 51 pushes the support ring 52 downward inside the housing 1. The movable valve ring 53 adheres to the inner wall of the upper guide plate 55 under the action of water pressure, so that the clean water in the housing 1 enters between the two guide plates 55 through the support ring 52 and the guide plate 55, and is sprayed out to the filter assembly 4.

[0022] Chemical waste solvent is injected into the housing 1 through the support assembly 3 and filtered through the filter assembly 4. When the filter assembly 4 needs cleaning, cleaning water is injected into the housing 1, with the water level higher than the filter assembly 4. The drive component 51 pushes the support ring 52 downward within the housing 1. As the support ring 52 moves downward, it pushes the cleaning water within the housing 1. The water, under pressure, pushes the movable valve ring 53 upward along the guide rod 57, causing the inner wall of the movable valve ring 53 to abut against the inner wall of the upper guide plate 55. The pressurized water passes between the lower guide plate 55 and the support ring 52, and is discharged between the two guide plates 55 under the guidance of the movable valve ring 53. Since the distance between the two guide plates 55 gradually decreases from the outer perimeter to the inner wall, and the support ring 52 and the guide plate 55... The distance between the two guide plates 55 is greater than the distance between the two guide plates 55, thereby increasing the impact force of the water discharged from the two guide plates 55. At the same time, the two guide plates 55 are sleeved on the outside of the filter assembly 4. The discharged water impacts the surface of the filter assembly 4, achieving the purpose of backwashing the filter assembly 4. Conversely, when the drive component 51 drives the support ring 52 to move in the opposite direction, the movable valve ring 53 is pressed against the inner wall of the lower guide plate 55 under the action of water pressure. In this way, the support ring 52 moves up and down in the housing 1, squeezing the internal clean water onto the surface and impacting the surface of the filter assembly 4 through the guidance of the two guide plates 55, thus achieving the purpose of cleaning. This ensures the filtration and purification effect of chemical waste solvents, avoids the need for manual disassembly and cleaning for filter system maintenance, reduces the difficulty of operation and downtime, and thus ensures the utilization rate of the equipment, while reducing labor costs and safety risks.

[0023] like Figure 3 As shown, the support assembly 3 includes an upper support member 32 fixed to the top of the housing 1, a top cover 31 fixed to the top of the upper support member 32, a lower support member 34 fixed to the bottom of the housing 1, a drain pipe 35 installed in the middle of the bottom of the lower support member 34, and a discharge pipe 36 installed on the lower support member 34. The middle part of the top of the lower support member 34 is recessed.

[0024] Chemical waste solvent is injected into the filter assembly 4 through the top cover 31 to filter impurities. The drain pipe 35 is closed, while the discharge pipe 36 is open. The filtered chemical waste solvent is discharged through the filter assembly 4 through the discharge pipe 36, while the filtered impurities remain inside the filter assembly 4. When the filter assembly 4 needs to be cleaned, the discharge pipe 36 and the drain pipe 35 are closed, and cleaning water is injected through the top cover 31. The cleaning assembly 5 moves up and down along the inside of the housing 1 to clean the filter assembly 4. After cleaning, the discharge pipe 36 and the drain pipe 35 are opened to drain the cleaning water. Since the middle part of the top of the lower support 34 is concave, impurities are prevented from accumulating on the top of the lower support 34 and being unable to be discharged.

[0025] like Figures 4-6As shown, the outer annular array of the upper support member 32 is provided with guide blocks 37; The filter assembly 4 includes a movable kit 41 that is movably fitted outside the upper support 32, and the movable kit 41 is limited to slide vertically by a guide block 37; The bottom of the active kit 41 is equipped with a connector 42 and an upper docking frame 43, and the connector 42 and the upper docking frame 43 are movably clamped at the bottom of the connector 42; The top of the lower support 34 is fixedly equipped with a lower connecting frame 45, and a filter cloth body 44 is provided between the upper connecting frame 43 and the lower connecting frame 45; A top support plate 56 is provided on the top of the upper guide plate 55; The initial support ring 52 and the guide plate 55 are located at the upper end inside the housing 1 under the action of the drive component 51. The filter cloth body 44 is taut by pushing the upper docking frame 43 through the top support plate 56. The drive unit 51 pushes the support ring 52 and guide plate 55 downward, the top support plate 56 disengages from the upper docking frame 43, and the two guide plates 55 move downward to spray cleaning water to impact the filter cloth body 44. The filter cloth body 44 is impacted and pulls the upper docking frame 43 and connector 42, causing the movable kit 41 to move downward along the guide block 37, so that the filter cloth body 44 is in a relaxed state.

[0026] The initial support ring 52, guide plate 55, and top support plate 56 are positioned at the upper end of the housing 1 under the action of the drive member 51. The top support plate 56 pushes the upper docking frame 43, connector 42, and movable kit 41, so that the top of the movable kit 41 fits against the bottom of the outer periphery of the upper support member 32, and the filter cloth body 44 is in a taut state. Chemical waste solvents can then be injected into the housing 1 and filtered and purified by the filter cloth body 44. When it is necessary to clean the filter cloth body 44, cleaning water is injected into the housing 1 through the top cover 31. The drive member 51 pushes the support ring 52 and guide plate 55 downward, pushing the cleaning water... The water is sprayed between the two guide plates 55 onto the filter cloth body 44, and the filter cloth body 44 contracts inward due to the impact. At this time, the upper end of the filter cloth body 44 is connected to the upper connecting frame 43 and the connecting piece 42, which causes the movable kit 41 to move down along the guide block 37, so that the filter cloth body 44 is in a relaxed state. This avoids the excessive impact force of the cleaning water discharged between the two guide plates 55 from tearing the filter cloth body 44, thereby improving the service life of the filter cloth body 44. At the same time, when the filter cloth body 44 is in a relaxed state, the fiber gap of the filter cloth body 44 increases, and the cleaning effect of the filter cloth body 44 is improved by the impact force of the cleaning water.

[0027] Conversely, after cleaning is completed, the support ring 52 resets and pushes the upper connecting frame 43 and the connecting piece 42 through the top support plate 56, so that the movable kit 41 moves up along the guide block 37, so that the filter cloth body 44 is in a taut state, and the chemical waste solvent can be filtered and purified through the filter cloth body 44.

[0028] like Figure 4 , Figure 6 and Figure 8 As shown, the support assembly 3 also includes a support grid 33 installed between the upper support member 32 and the lower support member 34; When the filter cloth body 44 is in a relaxed state, and the filter cloth body 44 is impacted by the cleaning water sprayed out by the two guide plates 55 moving downward, the filter cloth body 44 gathers inward to increase the distance with the inner wall of the guide plates 55, and is supported by the support frame 33.

[0029] By injecting cleaning water into the housing 1, the drive component 51 pushes the support ring 52 and guide plate 55 downwards, while the movable kit 41 moves downwards along the guide block 37, so that the filter cloth body 44 is in a relaxed state. As the support ring 52 and guide plate 55 move downwards, the cleaning water is sprayed out between the two guide plates 55 and impacts the surface of the filter cloth body 44. Under the impact of the cleaning water, the filter cloth body 44 gathers inwards and is supported by the support frame 33, increasing the distance between the filter cloth body 44 and the inner wall of the guide plate 55, avoiding damage to the filter cloth body 44 due to excessive impact. At the same time, the support frame 33 ensures the cleaning effect of the filter cloth body 44 and further prevents the filter cloth body 44 from shrinking inwards and being pulled and damaged.

[0030] like Figure 2 , Figure 6 and Figure 7 As shown, a drive assembly 6 is provided inside the housing 1. The drive assembly 6 includes a transmission rod 62 movably disposed inside the housing 1, and an arc-shaped guide groove 65 is provided on the outside of the transmission rod 62. The support ring 52 is movably sleeved on the outside of the transmission rod 62 through the connecting pipe, and the inner wall of the connecting pipe is provided with a slider that is movably engaged in the arc-shaped guide groove 65; A guide 61 is fixedly mounted on the upper end of the transmission rod 62. A limit guide rod is provided on the outside of the guide 61, and a docking kit 63 is movably sleeved on the outside of the guide 61. The outside of the docking kit 63 is hinged to the connector 42 via the connecting rod 64; The downward movement of the support ring 52 drives the transmission rod 62 to rotate via the slider on the inner wall of the connector, and drives the connector 42, the upper connector frame 43 and the filter cloth body 44 to rotate via the docking kit 63 and the connecting rod 64.

[0031] As the support ring 52 and guide plate 55 move downward within the housing 1, driven by the drive component 51, the support ring 52 moves downward along the transmission rod 62 via the connecting pipe. The transmission rod 62 rotates through the cooperation of the slider on the inner wall of the connecting pipe and the arc-shaped guide groove 65. The transmission rod 62 then drives the guide component 61, the docking kit 63, the connecting rod 64, the connecting component 42, the upper docking frame 43, and the filter cloth body 44 to rotate. This prevents the inner wall of the filter cloth body 44 from being impacted by water and ensures that the external contact of the mesh frame 33 is always supported, avoiding dead corners and thus improving the cleaning effect of the filter cloth body 44.

[0032] Working principle and usage process of this invention: The initial support ring 52, guide plate 55, and top support plate 56 are positioned at the upper end of the housing 1 under the action of the drive component 51. The top support plate 56 pushes the upper docking frame 43, connector 42, and movable kit 41, causing the top of the movable kit 41 to fit against the bottom of the outer periphery of the upper support component 32. The filter cloth body 44 is in a taut state, allowing chemical waste solvents to be injected into the housing 1 and filtered and purified through the filter cloth body 44. When cleaning of the filter cloth body 44 is required, cleaning water is injected into the housing 1 through the top cover 31. 51 pushes the support ring 52 and guide plate 55 downward, pushing the cleaning water through the two guide plates 55 to spray onto the filter cloth body 44. Under the impact of the cleaning water, the filter cloth body 44 gathers inward and is supported by the support frame 33, increasing the distance between the filter cloth body 44 and the inner wall of the guide plate 55, avoiding damage to the filter cloth body 44 due to excessive impact. At the same time, the support frame 33 ensures the cleaning effect of the filter cloth body 44 and further prevents the filter cloth body 44 from shrinking inward and being pulled and damaged. As the support ring 52 moves downward, it pushes the clean water inside the housing 1. The water, under pressure, pushes the movable valve ring 53 upward along the guide rod 57, causing the inner wall of the movable valve ring 53 to abut against the inner wall of the upper guide plate 55. The pressurized water passes between the lower guide plate 55 and the support ring 52, and under the guidance of the movable valve ring 53, it is discharged between the two guide plates 55. Since the distance between the two guide plates 55 gradually decreases from the outer perimeter to the inner wall, and the distance between the support ring 52 and the guide plate 55 is greater than the distance between the two guide plates 55, the efficiency of the two guide plates is improved. The guide plate 55 discharges water with impact force. At the same time, the two guide plates 55 are sleeved on the outside of the filter assembly 4. The discharged water hits the surface of the filter assembly 4, achieving the purpose of backwashing the filter assembly 4. Conversely, when the drive member 51 drives the support ring 52 to move in the opposite direction, the movable valve ring 53 is pressed against the inner wall of the lower guide plate 55 under the action of water pressure. In this way, the support ring 52 moves up and down in the housing 1, squeezing the internal clean water onto the surface and impacting the surface of the filter assembly 4 through the guidance of the two guide plates 55, thus achieving the purpose of cleaning and ensuring the filtration and purification effect of chemical waste solvents. During the downward movement of the support ring 52 and guide plate 55 within the housing 1, the support ring 52 moves downward along the transmission rod 62 via the connecting pipe, and the transmission rod 62 rotates through the cooperation of the slider on the inner wall of the connecting pipe and the arc-shaped guide groove 65. The transmission rod 62 drives the guide 61, docking kit 63, connecting rod 64, connecting piece 42, upper docking frame 43 and filter cloth body 44 to rotate, thus preventing the inner wall of the filter cloth body 44 from being impacted by water and ensuring constant support of the external contact of the mesh frame 33, avoiding dead corners. After cleaning, the discharge pipe 36 and the sewage pipe 35 are opened to discharge the cleaning water.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning chemical waste solution filtration and purification device, comprising a housing (1), characterized in that, Also includes: The filter assembly (4) is installed inside the housing (1) via the support assembly (3) and is used to filter and purify chemical waste solvents. A cleaning component (5) is disposed inside the housing (1) and is used to clean the filter assembly (4). The cleaning component (5) includes a drive member (51) fixed to the top of the housing (1). The output end of the drive member (51) is provided with a support ring (52) sleeved on the outside of the filter component (4). The top and bottom of the support ring (52) are fixed with guide plates (55) through a support frame (54). The distance between the two guide plates (55) gradually decreases from the outer periphery to the inner wall; The inner wall of the support ring (52) is provided with an annular groove, and guide rods (57) are arranged in an array in the annular groove. The guide rods (57) are vertically slidably arranged along the guide rods (57) in the annular groove. Clean water is injected into the housing (1), and the drive unit (51) pushes the support ring (52) downward inside the housing (1). The movable valve ring (53) adheres to the inner wall of the upper guide plate (55) under the action of water pressure, so that the clean water in the housing (1) enters between the two guide plates (55) through the support ring (52) and the guide plate (55) and is sprayed out to the filter assembly (4).

2. The self-cleaning chemical waste solution filtration and purification device according to claim 1, characterized in that: The support assembly (3) includes an upper support member (32) fixedly mounted on the top of the housing (1), a top cover (31) fixedly mounted on the top of the upper support member (32), a lower support member (34) fixedly mounted on the bottom of the housing (1), a drain pipe (35) installed in the middle of the bottom of the lower support member (34), and a discharge pipe (36) installed on the lower support member (34). The middle part of the top of the lower support member (34) is recessed.

3. The self-cleaning chemical waste solution filtration and purification device according to claim 2, characterized in that: The outer annular array of the upper support member (32) is provided with guide blocks (37). The filter assembly (4) includes a movable kit (41) that is movably fitted outside the upper support (32), and the movable kit (41) is limited to vertical sliding by a guide block (37).

4. The self-cleaning chemical waste solution filtration and purification device according to claim 3, characterized in that: The bottom of the movable kit (41) is equipped with a connector (42) and an upper docking frame (43), and the connector (42) and the upper docking frame (43) are movably clamped at the bottom of the connector (42); The lower support member (34) is fixedly mounted with a lower connecting frame (45), and a filter cloth body (44) is provided between the upper connecting frame (43) and the lower connecting frame (45).

5. The self-cleaning chemical waste solution filtration and purification device according to claim 4, characterized in that: A top support plate (56) is provided on the top of the guide plate (55) at the upper end; Initially, the support ring (52) and guide plate (55) are located at the upper end of the housing (1) under the action of the drive member (51). The upper connecting frame (43) is pushed by the top support plate (56) to make the filter cloth body (44) taut.

6. The self-cleaning chemical waste solution filtration and purification device according to claim 5, characterized in that: The drive unit (51) pushes the support ring (52) and guide plate (55) to move down, the top support plate (56) disengages from the upper docking frame (43), and the two guide plates (55) move down to spray cleaning water to impact the filter cloth body (44). The filter cloth body (44) is impacted and pulls the upper docking frame (43) and connector (42), causing the movable kit (41) to move down along the guide block (37), so that the filter cloth body (44) is in a relaxed state.

7. The self-cleaning chemical waste solution filtration and purification device according to claim 6, characterized in that: The support assembly (3) also includes a support grid (33) installed between the upper support member (32) and the lower support member (34). When the filter cloth body (44) is in a relaxed state, and the filter cloth body (44) is impacted by the downward spraying of cleaning water from the two guide plates (55), the filter cloth body (44) gathers inward to increase the distance from the inner wall of the guide plates (55), and is supported by the support frame (33).

8. The self-cleaning chemical waste solution filtration and purification device according to claim 1, characterized in that: The housing (1) is provided with a drive assembly (6), which includes a transmission rod (62) movably disposed inside the housing (1) and an arc-shaped guide groove (65) is provided on the outside of the transmission rod (62). The support ring (52) is movably sleeved on the outside of the transmission rod (62) through the connecting pipe, and the inner wall of the connecting pipe is provided with a slider that is movably engaged in the arc-shaped guide groove (65).

9. The self-cleaning chemical waste solution filtration and purification device according to claim 8, characterized in that: The upper end of the transmission rod (62) is fixedly fitted with a guide (61), and a limit guide rod is provided on the outside of the guide (61). A docking kit (63) is movably sleeved on the outside of the guide (61).

10. The self-cleaning chemical waste solution filtration and purification device according to claim 9, characterized in that: The outside of the docking kit (63) is hinged to the connector (42) via a connecting rod (64); The support ring (52) moves down and pushes the transmission rod (62) to rotate through the slider on the inner wall of the connector, and pushes the connector (42), the upper connector frame (43) and the filter cloth body (44) to rotate through the docking kit (63) and the connecting rod (64).

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