Automobile painting waste liquid treatment equipment

Abstract

The application discloses a kind of automobile coating waste liquid processing equipment, belong to wastewater treatment technical field.It includes storage pit, regulating basin and air float mechanism, and filter assembly is installed on storage pit;Filter assembly includes support tube installed on storage pit, and partition is arranged in support tube, and fixed pipe is fixedly installed on both sides of partition, and filter hole is opened in fixed pipe, and adjusting pipe is rotatably connected on fixed pipe, and inlet hole is opened on adjusting pipe, and scraper and baffle are fixedly installed in adjusting pipe, and fixed pipe is communicated with regulating basin;Adjusting pipe is connected with the output end of drive assembly.The application can make effluent reach industrial reuse standard by filtering, air float separation and reverse osmosis and other multi-stage treatment of waste liquid, realize the recycling of water resources, and through the synergistic effect of hydraulic reverse flushing, mechanical scraping and cleaning liquid injection, the inner and outer surfaces of fixed pipe filter area and filter hole impurities and adhering matter are automatically cleaned, with good cleaning effect and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a kind of automobile painting waste liquid treatment equipment. BACKGROUND

[0002] A large amount of pollutants such as resin, pigment, solvent, heavy metal ions and emulsified oil will be produced in automobile painting process, and if directly discharged, it will seriously pollute the environment, so it needs to be purified by professional treatment equipment to achieve standard or resource recycling. The existing coating waste liquid treatment equipment filter system is easy to block, frequent shutdown disassembly and cleaning are required, and impurity cleaning relies on manual flushing or mechanical scraping, the cleaning process needs to interrupt the normal filtration process, and it is difficult to completely remove the sticky impurities (such as emulsified oil residues) in the filter hole, resulting in gradual decline of filtration performance. In view of this, we propose a kind of automobile painting waste liquid treatment equipment. SUMMARY

[0003] The present application aims to provide a kind of automobile painting waste liquid treatment equipment, to solve the technical problems of unstable waste liquid filtration effect and difficult cleaning in the prior art.

[0004] The present application provides a kind of automobile painting waste liquid treatment equipment, including mud storage pool, adjusting pool for adjusting water quality balance and air floatation mechanism for air floatation deslagging, the waste liquid in adjusting pool is transported into air floatation mechanism by pump body, and the mud storage pool is installed with filter assembly;

[0005] The filter assembly includes a support pipe installed on the mud storage pool, a partition plate is arranged in the support pipe, the partition plate is fixedly installed on both sides of the partition plate, a filter hole is formed in the fixed pipe, a regulating pipe is rotatably connected to the fixed pipe, a liquid inlet hole is formed in the regulating pipe, a scraper and a baffle are fixedly installed in the regulating pipe, and the fixed pipe is communicated with the adjusting pool through a liquid outlet pipe;

[0006] Two groups of driving assemblies are connected with the output end of the driving assembly;

[0007] The driving assembly drives the regulating pipe to rotate, so that the scraper can slide along the outer wall of the fixed pipe to remove the attached impurities in the filter hole area of the fixed pipe, and guide the impurities to the mud storage pool.

[0008] As a further description of the above technical solution, the filter hole area is on the upper side of the fixed pipe, the arc length of the filter hole area is not greater than one third of the circumference of the fixed pipe, the two groups of regulating pipes are distributed on both sides of the partition plate, the outer diameter of the regulating pipe is equal to the inner diameter of the support pipe, and the regulating pipe rotates in the support pipe.

[0009] As a further description of the above technical solution, the scraper and the baffle are distributed along the radial direction of the regulating pipe, and one end of the scraper and the baffle abuts against the fixed pipe.

[0010] The filter cavity is formed between the scraper, the baffle and the fixed tube, and the shortest arc length of the filter cavity is greater than the arc length of the filter hole area.

[0011] As a further description of the above technical solution, the top of the support tube is connected with a liquid inlet pipe, and the bottom of the support tube is connected with a discharge pipe which is connected with a sludge storage tank.

[0012] As a further description of the above technical solution, a flow meter is installed on the liquid outlet pipe for flow monitoring.

[0013] As a further description of the above technical solution, two sets of cleaning assemblies are further included, each of which comprises a hydraulic cylinder installed on the sludge storage tank, and a top rod is fixedly installed at the output end of the hydraulic cylinder, and a top plate and a sealing plate are fixedly installed on the top rod, and the top plate and the sealing plate are in sliding fit with the fixed tube.

[0014] As a further description of the above technical solution, the distance between the top plate and the sealing plate is greater than the maximum distance between the baffle and the liquid outlet pipe along the axial direction of the fixed tube.

[0015] As a further description of the above technical solution, a spray head is fixedly installed on the top plate, and the spray head is connected with a liquid supply device through a hose.

[0016] As a further description of the above technical solution, the air floatation mechanism comprises a mixing tank, a separation tank, an air floatation tank, a slag collecting tank for collecting floating slag, and an overflow tank, the adjustment tank is used for flocculation and pH adjustment, and the bottom of the mixing tank is connected with the separation tank.

[0017] A dissolved air pipe connected with a dissolved air pump is installed in the separation tank, and a plurality of release holes are formed in the dissolved air pipe, and a slag scraper is installed on the top of the air floatation tank.

[0018] As a further description of the above technical solution, a reverse osmosis unit connected with the overflow tank is further included, and the reverse osmosis unit filters the waste liquid delivered from the overflow tank through a RO membrane.

[0019] As described above, due to the adoption of the above technical solution, the present application has the following advantages:

[0020] 1. The present application can make the effluent reach the industrial reuse standard through multi-stage treatment such as filtration, air floatation separation and reverse osmosis, realize the recycling of water resources, and reduce the consumption of water resources.

[0021] 2. The present application can effectively clean the inner and outer surfaces of the fixed tube filter area and the impurities and adhesives in the filter holes through the cooperation of hydraulic reverse flushing, mechanical scraping and cleaning liquid injection, and has good cleaning effect and high efficiency.

[0022] 3. The two sets of fixed tubes of this invention operate independently. When cleaning one side, the other side can filter normally, which can realize the alternating operation of the two chambers, avoid downtime for maintenance, ensure the continuity of waste liquid treatment, and in non-maintenance state, the two chambers filter synchronously, effectively improving the filtration efficiency.

[0023] 4. The design of the filter cavity arc length being greater than the filter hole area, combined with the rotation of the regulating tube, expands the impurity temporary storage space and achieves gravity self-discharge of slag, effectively reducing the slag adhesion rate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an automotive painting waste liquid treatment device disclosed in a preferred embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the installation of a filter assembly in an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the drive component connection structure of an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection structure of the cleaning component of an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the filter assembly structure of an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram showing the location of the filter holes in an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of a filter component of an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention.

[0031] Figure 8 This is a schematic diagram of the unloading pipe connection of an automotive painting waste liquid treatment device according to a preferred embodiment of the present invention.

[0032] The figure label is explained: 1, the sludge storage tank; 2, the adjusting pool; 3, the air float mechanism; 4, the filter assembly; 41, the support pipe; 42, the partition; 43, the fixed pipe; 44, the filter hole; 45, the adjusting pipe; 46, the liquid inlet hole; 47, the scraper; 48, the baffle; 481, the filter cavity; 49, the liquid inlet pipe; 410, the discharge pipe; 411, the liquid outlet pipe; 412, the flow meter; 5, the driving assembly; 51, the motor; 52, the gear ring; 53, the gear; 6, the cleaning assembly; 61, the hydraulic cylinder; 62, the ejector rod; 63, the top plate; 64, the sealing plate; 65, the nozzle; 66, the hose; 31, the mixing pool; 32, the separation pool; 33, the air float pool; 34, the slag collection pool; 35, the dissolved gas pipe; 36, the overflow pool; 7, the stirrer; 8, the slag scraper. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Reference Figures 1 to 8 The embodiment discloses a kind of automobile coating waste liquid processing equipment, including the sludge storage tank 1 of installation in turn, adjusting pool 2 and air float mechanism 3, filter assembly 4 is installed on sludge storage tank 1, filter assembly 4 includes support pipe 41 fixedly installed on sludge storage tank 1, support pipe 41 is provided with partition 42, partition 42 is fixedly installed on both sides of fixed pipe 43, filter hole 44 is formed on fixed pipe 43, the filter region formed by filter hole 44 is at the upside of fixed pipe 43, and the arc length of filter region is not more than one third of the circumference of fixed pipe 43, adjusting pipe 45 is rotatably connected on fixed pipe 43, two groups of adjusting pipe 45 are distributed on both sides of partition 42, the outer diameter of adjusting pipe 45 is equal to the inner diameter of support pipe 41, adjusting pipe 45 is rotatably installed in support pipe 41, the length of filter region is less than the length of adjusting pipe 45, so that filter region is in adjusting pipe 45.

[0035] Liquid inlet hole 46 is formed on adjusting pipe 45, scraper 47 and baffle 48 are fixedly installed in adjusting pipe 45, scraper 47 and baffle 48 are distributed along the radial direction of adjusting pipe 45, and one end of scraper 47 and baffle 48 is in contact with fixed pipe 43, filter cavity 481 is formed between scraper 47, baffle 48 and fixed pipe 43, the shortest arc length of filter cavity 481 is greater than the arc length of filter region, when filtering, filter cavity 481 with arc length greater than filter region has stronger ability to store impurities, reduces the risk of impurities blocking filter hole 44, and improves filtering capacity. It should be noted that, Figure 6 The position of adjusting pipe 45 is the initial state of filtering.

[0036] The top of the support pipe 41 is connected with the liquid inlet pipe 49, and the bottom of the support pipe 41 is connected with the discharge pipe 410 which is connected with the storage tank 1, and the discharge pipe 410 is used to transport the filtered impurities into the storage tank 1 for storage. The bottom of the fixed pipe 43 is connected with the liquid outlet pipe 411 which is connected with the adjusting tank 2, and the filtered waste liquid enters the adjusting tank 2 from the liquid outlet pipe 411. The liquid outlet pipe 411 is provided with the flow meter 412 for detecting the flow of the waste liquid.

[0037] The coating waste liquid enters the filter cavity 481 through the liquid inlet pipe 49, and the impurities are blocked by the filter area. The waste liquid passes through the filter hole 44 into the fixed pipe 43, and then enters the adjusting tank 2 through the liquid outlet pipe 411, so as to realize the preliminary filtration of the larger particles and suspended matters in the coating waste liquid, and the impurities are stored in the filter cavity 481.

[0038] Referring to Figure 3 The processing device further comprises two groups of driving assemblies 5. Each driving assembly 5 comprises a motor 51 fixedly installed on the storage tank 1 and a gear ring 52 fixedly installed at the end of the adjusting pipe 45. The output end of the motor 51 is fixedly provided with a gear 53 which is in meshing transmission with the gear ring 52. The output end of the motor 51 drives the gear 53 to rotate, and drives the gear ring 52 and the adjusting pipe 45 to rotate through meshing transmission, so as to realize the scraping and cleaning of the filter area by the scraper 47, and to strip the impurities on the upper side of the filter hole 44, thereby improving the filtering efficiency. When the filter hole 44 is blocked, a certain amount of waste liquid can be stored in the filter area with the rotation of the adjusting pipe 45. When the liquid inlet hole 46 of the adjusting pipe 45 is rotated to be connected with the discharge pipe 410, the impurities fall into the storage tank 1 from the discharge pipe 410 under the action of their own gravity and the waste liquid, so as to realize the automatic cleaning of the impurities. By storing a certain amount of waste liquid, the cleaning effect of the impurities can be improved, and the risk of adhesion of the impurities to the pipe wall can be reduced.

[0039] Referring to Figures 2 to 4The treatment equipment also includes two sets of cleaning components 6. Each cleaning component 6 includes a hydraulic cylinder 61 fixedly installed on the sludge storage tank 1. A push rod 62 is fixedly installed at the output end of the hydraulic cylinder 61. A top plate 63 and a sealing plate 64 are fixedly installed on the push rod 62. Both the top plate 63 and the sealing plate 64 are slidably engaged with the fixed pipe 43. The top plate 63 and the sealing plate 64 move along the axial direction of the fixed pipe 43. In the axial direction of the fixed pipe 43, the distance between the top plate 63 and the sealing plate 64 is greater than the maximum distance between the partition plate 42 and the outlet pipe 411, thereby ensuring that the sealing plate 64 is always on one side of the outlet pipe 411 during the movement. The output end of the hydraulic cylinder 61 drives the push rod 62, the top plate 63, and the sealing plate 64 to move within the fixed tube 43. The top plate 63 can scrape the inner wall of the filter area of ​​the fixed tube 43, cleaning up grease and impurities and further reducing the risk of clogging in the filter area. When there are few impurities deposited in the filter chamber 481, and the flow meter 412 detects that the waste liquid flow rate is less than the first set flow rate value, the top plate 63 moves towards the partition 42, which can push the waste liquid in the fixed tube 43 to move in the opposite direction under pressure. The waste liquid moves from the inside to the outside of the fixed tube 43, thereby squeezing out the impurities in the filter hole 44 and allowing the impurities to settle again in the filter chamber 481, thus maintaining the normal operation of filtration.

[0040] A nozzle 65 is fixedly installed on the top plate 63. The nozzle 65 is connected to the liquid supply equipment through a hose 66. During cleaning in the non-filtration state, the top plate 63 moves between the outlet pipe 411 and the partition plate 42. The liquid supply equipment delivers a sufficient amount of cleaning fluid into the cavity of the fixed pipe 43 between the partition plate 42 and the top plate 63 through the hose 66 and the nozzle 65. The output end of the hydraulic cylinder 61 drives the top plate 63 to move quickly towards the partition plate 42, rapidly squeezing the cleaning fluid. Under pressure, the cleaning fluid moves from the inside to the outside of the fixed pipe 43, thereby squeezing out impurities in the filter holes 44 and cleaning the filter holes 44. It should be noted that during the process of the top plate 63 moving towards the partition plate 42, when some of the filter holes 44 correspond to the area between the top plate 63 and the sealing plate 64, the cleaning fluid or waste fluid can flow into the outlet pipe 411 through the filter holes 44 and the area between the top plate 63 and the sealing plate 64, thereby relieving pressure and preventing excessive pressure from damaging the pipeline.

[0041] Reference Figure 1The flotation mechanism 3 includes a mixing tank 31, a separation tank 32, a flotation tank 33, and a sludge collection tank 34. Both the equalization tank 2 and the mixing tank 31 are equipped with agitators 7 to accelerate mixing. The bottom of the mixing tank 31 is connected to the separation tank 32. After flocculant and coagulant aid are added to the mixing tank 31, the agitator 7 stirs the colloids to destabilize them and form micro-flocculations, which then enter the separation tank 32 from the bottom of the mixing tank 31. The separation tank 32 is equipped with a dissolved air pump pipe 35 connected to the dissolved air pump. The dissolved air pump pipe 35 has several release holes. Dissolved air water is generated and overflows through the release hole on the dissolved air pipe 35, producing microbubbles that combine with flocs and oil to form a composite scum of "bubbles-flocs-oil" that floats to the surface. The floating scum enters the flotation tank 33 and floats on the surface of the waste liquid. A scraper 8 is installed on the top of the flotation tank 33. The scraper plate of the scraper 8 moves periodically to scrape the scum on the surface of the waste liquid into the scum collection tank 34 for collection. Impurities entering the flotation tank 33 settle to the bottom and accumulate. The supernatant after removing the scum and sediment overflows into the overflow tank 36.

[0042] The treatment equipment also includes a reverse osmosis unit. Waste liquid overflowing from the overflow tank 36 enters the reverse osmosis unit and undergoes further deep treatment by the RO membrane before being discharged in compliance with emission standards or secondary recycling standards, or reused in the production line.

[0043] Working principle: Coating wastewater enters the filter chamber 481 through the inlet pipe 49 and inlet hole 46. Waste liquid enters the fixed pipe 43 through the filter hole 44. Large particles of impurities are blocked in the filter chamber 481. The waste liquid in the fixed pipe 43 flows into the equalization tank 2 through the outlet pipe 411. Demulsifier and pH adjuster are added to the equalization tank 2 and continuously stirred and mixed by the stirrer 7. The demulsifier can destroy the structure of the emulsified oil, causing the oil droplets to agglomerate into large particles. The pH adjuster can regulate the pH value of the waste liquid, providing the best reaction environment for the demulsifier. The mixed waste liquid is pumped into the mixing tank 31.

[0044] Flocculant and coagulant aid are added to the mixing tank 31 and stirred by the agitator 7 to destabilize the colloids and form micro-flocs. The waste liquid enters the separation tank 32 from the bottom of the mixing tank 31. The dissolved air pump generates dissolved air water, which overflows through the release hole on the dissolved air pipe 35, generating microbubbles that combine with the flocs and oil to form a composite scum of "bubbles-flocs-oil" that floats to the surface. The floating scum and waste liquid enter the flotation tank 33, where the scum floats on the surface of the waste liquid. The scraper plate of the scraper 8 moves periodically to scrape the scum on the surface of the waste liquid into the scum collection tank 34 for collection. Impurities that cannot maintain floating in the flotation tank 33 settle to the bottom under gravity. The waste liquid after removing the scum and sediment overflows from the overflow tank 36 and is transported to the reverse osmosis unit. The waste liquid is further treated by the RO membrane and then discharged in accordance with the emission standards or the secondary recycling standards, or reused in the production line.

[0045] As the filter assembly 4 continuously filters impurities, the impurities accumulate at the filter holes 44, causing the filtration volume of waste liquid to gradually decrease. When the wastewater flow detected by the flow meter 412 drops to the first threshold, the output end of the corresponding hydraulic cylinder 61 pushes the top rod 62, the top plate 63, and the sealing plate 64 to move towards the partition 42. When the top plate 63 moves between the partition 42 and the outlet pipe 411, the outlet pipe 411 is in an isolated state and cannot drain normally. As the top plate 63 continues to move, the space between the partition 42 and the top plate 63 gradually decreases, forcing the waste liquid to move from the inside to the outside of the fixed pipe 43, thereby achieving reverse flushing of the filter holes 44 and scraping and cleaning the adhesive on the filter area of ​​the inner surface of the fixed pipe 43. During the cleaning process, the sealing plate 64 is always kept on one side of the outlet pipe 411. After the cleaning is completed, the output end of the hydraulic cylinder 61 drives the top plate 63 to move in the opposite direction, and the waste liquid between the top plate 63 and the sealing plate 64 is discharged from the outlet pipe 411. By performing a backwashing operation on the filter hole 44 during filtration, impurities in the filter chamber 481 can be re-sedied and accumulated, thereby alleviating blockage to a certain extent.

[0046] When the wastewater flow detected by flow meter 412 drops to the second threshold, which is less than the first threshold, motor 51 drives gear 53 to rotate, which in turn drives gear ring 52 and regulating pipe 45 to rotate through meshing transmission. Figure 6 The initial state of the device is rotated counterclockwise, gradually blocking the inlet pipe 49. When the inlet pipe 49 is completely blocked by the regulating pipe 45, the scraper 47 moves to the filtration area and contacts the filter hole 44. The filter chamber 481 still stores a certain amount of unfiltered waste liquid. As the regulating pipe 45 drives the scraper 47 to rotate continuously, the scraper 47 scrapes and cleans the filtration area corresponding to the filter hole 44. The inlet hole 46 gradually opens downward and connects to the discharge pipe 410. Under the influence of gravity and the flow of waste liquid, the impurities fall from the discharge pipe 410 into the sludge storage tank 1, thus achieving impurity cleaning and discharge.

[0047] The output of motor 51 rotates in reverse, driving the control regulating tube 45 to rotate in reverse until the inlet pipe 49 is just isolated. At this time, the filter chamber 481 is isolated from the inlet pipe 49, and the filter hole 44 is completely inside the filter chamber 481. The output of hydraulic cylinder 61 pushes the top plate 63 to move between the partition 42 and the outlet pipe 411 without contacting the filter hole 44. The liquid supply equipment delivers a sufficient amount of cleaning fluid to the inner cavity of the fixed tube 43 between the partition 42 and the top plate 63 through the hose 66 and the nozzle 65. The output of hydraulic cylinder 61 drives the top plate 63 to move quickly towards the partition 42 side, quickly squeezing the cleaning fluid. The cleaning fluid, under pressure, will move from the inside of the fixed tube 43 through the filter hole 44 to the outside, thereby squeezing out the impurities in the filter hole 44 and cleaning the filter hole 44.

[0048] After cleaning with the cleaning fluid several times, the output end of the motor 51 rotates in the forward direction again, driving the regulating pipe 45 to rotate, so that the liquid inlet 46 is connected to the discharge pipe 410 again, and the residual impurities and cleaning fluid in the filter chamber 481 are discharged from the discharge pipe 410 into the mud storage tank 1.

[0049] In this embodiment of the invention, by setting two sets of fixed pipes 43, two sets of filtration areas are provided. Therefore, when one side is blocked and cleaned, the other set can still continue to filter, thereby ensuring that the waste liquid can be continuously transported. When the filter hole 44 is not blocked, the two sets of filtration areas can filter at the same time, thereby improving the filtration efficiency.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste liquid treatment device for automotive painting, characterized in that: It includes a sludge storage tank (1), an equalization tank (2) for adjusting water quality balance, and an air flotation mechanism (3) for air flotation sludge discharge. The waste liquid in the equalization tank (2) is pumped into the air flotation mechanism (3). The sludge storage tank (1) is equipped with a filter assembly (4). The filter assembly (4) includes a support pipe (41) installed on the sludge storage tank (1), a baffle (42) is provided inside the support pipe (41), a fixed pipe (43) is fixedly installed on both sides of the baffle (42), a filter hole (44) is opened on the fixed pipe (43), an adjusting pipe (45) is rotatably connected to the fixed pipe (43), an inlet hole (46) is opened on the adjusting pipe (45), a scraper (47) and a baffle (48) are fixedly installed inside the adjusting pipe (45), and the fixed pipe (43) is connected to the regulating tank (2) through the outlet pipe (411); Two sets of drive components (5), with the regulating tube (45) connected to the output end of the drive components (5); The filter hole (44) area is located on the upper side of the fixed tube (43), and the arc length of the filter hole (44) area is no greater than one-third of the circumference of the fixed tube (43). The two sets of adjustment tubes (45) are distributed on both sides of the partition (42). The outer diameter of the adjustment tube (45) is equal to the inner diameter of the support tube (41), and the adjustment tube (45) rotates inside the support tube (41). The scraper (47) and baffle (48) are radially distributed along the regulating pipe (45), and one end of the scraper (47) and baffle (48) abuts against the fixed pipe (43); A filter chamber (481) is formed between the scraper (47), the baffle (48) and the fixed tube (43), and the shortest arc length of the filter chamber (481) is greater than the arc length of the filter hole (44) area; Two sets of cleaning components (6), each cleaning component (6) includes a hydraulic cylinder (61) installed on the sludge storage tank (1), a push rod (62) is fixedly installed at the output end of the hydraulic cylinder (61), a top plate (63) and a sealing plate (64) are fixedly installed on the push rod (62), and the top plate (63) and the sealing plate (64) are both slidably engaged with the fixed pipe (43); The distance between the top plate (63) and the sealing plate (64) is greater than the maximum distance between the partition (42) and the outlet pipe (411) along the axis of the fixed pipe (43); A nozzle (65) is fixedly installed on the top plate (63), and the nozzle (65) is connected to the liquid supply equipment through a hose (66); The drive assembly (5) drives the regulating tube (45) to rotate, which enables the scraper (47) to slide along the outer wall of the fixed tube (43) to scrape off the attached impurities in the filter hole (44) area of ​​the fixed tube (43) and guide the impurities to the sludge storage tank (1).

2. The automotive painting waste liquid treatment equipment according to claim 1, characterized in that: The top of the support pipe (41) is connected to the liquid inlet pipe (49), and the bottom of the support pipe (41) is connected to the sludge storage tank (1) via the unloading pipe (410).

3. The automotive painting waste liquid treatment equipment according to claim 1, characterized in that: A flow meter (412) for flow monitoring is installed on the outlet pipe (411).

4. The automotive painting waste liquid treatment equipment according to any one of claims 1-3, characterized in that: The flotation mechanism (3) includes a mixing tank (31), a separation tank (32), a flotation tank (33), a slag collection tank (34) for collecting slag, and an overflow tank (36). The regulating tank (2) is used for flocculation and pH adjustment. The bottom of the mixing tank (31) is connected to the separation tank (32). The separation tank (32) is equipped with a dissolved air pipe (35) connected to the dissolved air pump. Several release holes are opened on the dissolved air pipe (35). A slag scraper (8) is installed on the top of the flotation tank (33).

5. The automotive painting waste liquid treatment equipment according to claim 4, characterized in that: It also includes a reverse osmosis unit connected to the overflow tank (36), which filters the waste liquid delivered to the overflow tank (36) through an RO membrane.

Images