Water treatment device for coating production

Abstract

The invention relates to the technical field of sewage treatment, in particular to a coating production water treatment device which comprises a rack, an electric control box is arranged on the front side of the rack, a plurality of cross beams are symmetrically arranged on the upper portion and the lower portion of the rack, and a plurality of filtering mechanisms are symmetrically arranged on the rack. The ultrasonic generator is matched to generate high-frequency sound waves, a filter screen and a filter element in the filter mechanism are subjected to secondary cleaning through mechanical impact force generated by the cavitation effect, blades and scraping strips on the blades are driven to rotate under the impact of water flow, resin and glue liquid outside the filter screen are scraped off through the scraping strips, and third-level cleaning is achieved; the cleaning effect is good, the disassembly and maintenance period is prolonged, magnetic suspension of the blades is achieved through the magnetic force between the first magnet and the second magnet, the friction force of the blades is small, at the moment, the blades are impacted through the annularly-arranged spray heads, and rotary cleaning of the blades and the scraping strips on the blades is achieved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a water treatment device for paint production. Background Technology

[0002] Paint is a material that can be applied to the surface of an object to form a continuous, hard film through chemical and physical changes. It is widely used in construction, industry, and art. The core of paint production is to mix, disperse, grind, and adjust the proportions of raw materials such as resins, pigments, fillers, solvents, and additives to create a uniform and stable paint product. Paint production generates wastewater, which requires specialized equipment for treatment. Wastewater treatment processes include: separate collection, pretreatment, organic matter degradation, heavy metal removal, and advanced treatment. Ultrafiltration equipment is typically used at the end of the advanced wastewater treatment process. However, the following problems exist during filtration: 1. During filtration, pigment and filler particles, resin residues, and colloidal organic matter in the coating will be adsorbed on the membrane surface or block the membrane pores, forming a fouling layer. The resin residues and colloids in the fouling layer are highly viscous, and it is difficult to remove the viscous substances by traditional water backwashing. It is necessary to disassemble and maintain the membrane, which is time-consuming, labor-intensive, and inefficient.

[0003] 2. Ultrafiltration equipment typically consists of multiple independent filter cartridges that work in parallel and synchronously. All filter cartridges receive water and are filtered at the same time without staged filtration. Although parallel filtration is highly efficient, the filtration effect is not very good. Furthermore, wastewater comes into direct contact with the filter cartridges, causing them to become contaminated quickly and the stains adhering to them are difficult to remove. Summary of the Invention

[0004] The purpose of this invention is to provide a water treatment device for paint production that is simple in structure and reasonably designed in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A water treatment device for paint production includes a frame, an electrical control box is provided on the front side of the frame, several crossbeams are provided on the upper and lower parts of the frame, and several filter mechanisms are provided on the frame. The multiple filter mechanisms are symmetrically divided into two groups, and the filter mechanisms are fixedly connected to the crossbeams by clamps. Also includes: An ultrasonic cleaning mechanism is installed at the bottom of the frame for cleaning the filter mechanism. The filter mechanism includes a housing that is detachably connected inside the clamp. The top of the housing is provided with an upper cover, and the bottom of the housing is provided with a lower cover. The filter assembly is provided inside the housing and is located between the upper cover and the lower cover. A self-cleaning component is provided at the bottom of the filter assembly for cleaning the filter assembly.

[0006] Preferably, the top of the upper cover is fixedly connected to a drain outlet, the top side wall of the upper cover is fixedly connected to a return outlet, and the outer wall of the lower cover is fixedly connected to a water inlet.

[0007] Preferably, the filter assembly includes several support blocks, with a bottom fixing ring fixedly installed on the top of the multiple support blocks, and several connecting rods fixedly installed on the top of the bottom fixing ring, with a top fixing ring fixedly connected to the top of the multiple connecting rods.

[0008] Preferably, a filter element is detachably installed inside both the bottom fixing ring and the top fixing ring, and a filter screen is sleeved on the outside of both the bottom fixing ring and the top fixing ring. A base plate is fixedly connected to the bottom of the filter screen, and a connecting ring is fixedly installed on the top of the top fixing ring. The top of the connecting ring is sealed and abuts against the bottom surface inside the top cover.

[0009] Preferably, the self-cleaning component includes a second magnet fixedly connected to the center of the bottom surface inside the lower cover, a fixed shaft fixedly installed at the top center of the second magnet, a first magnet movably sleeved outside the fixed shaft, the first and second magnets having the same magnetism on opposite sides, a blade fixedly installed on the top of the first magnet, an annular water pipe fixedly installed at the edge of the bottom surface inside the lower cover, a plurality of nozzles fixedly connected to the top of the annular water pipe in a spiral shape, a connecting pipe fixedly connected to the side wall of the annular water pipe, and the connecting pipe fixedly connected to the inner wall of the water inlet.

[0010] Preferably, two L-shaped arms are symmetrically installed at the top of the blade, and scraper strips are detachably installed on the vertical sections of the two L-shaped arms, with the scraper strips fitting against the outer wall of the filter screen.

[0011] Preferably, the ultrasonic cleaning mechanism includes an ultrasonic generator fixedly connected to the right side of the bottom of the frame, a connecting wire plugged into the left side of the ultrasonic generator, and an ultrasonic generator head detachably connected to the connecting wire, which is located inside the lower cover.

[0012] Preferably, each of the drain outlets in the front-side filter mechanism is fixedly connected to a No. 2 water outlet pipe, and the water inlets in the front-side filter mechanism are all fixedly connected to a No. 1 water inlet pipe. A sewage pipe is fixedly connected to the No. 1 water inlet pipe, the tops of multiple No. 2 water outlet pipes are all fixedly connected to a No. 2 output pipe, the bottom of the No. 2 output pipe is fixedly connected to a connecting pipe, a valve is fixedly installed in the middle of the connecting pipe, and the end of the connecting pipe away from the No. 2 output pipe is fixedly connected to a No. 2 water inlet pipe. The No. 2 water inlet pipe is fixedly connected to the water inlet in the rear-side filter mechanism.

[0013] Preferably, the return ports of the two sets of symmetrical filter mechanisms are fixedly connected to a manifold, the tops of the multiple manifolds are connected to a return pipe, and the bottom of the return pipe is fixedly connected to a second backflushing pipe.

[0014] Preferably, the drain outlet at the top of the filter mechanism located on the rear side is fixedly connected to a No. 1 water outlet pipe, and the tops of multiple No. 1 water outlet pipes are fixedly connected to a No. 1 output pipe, and a No. 1 backflushing pipe is fixedly connected to the No. 1 output pipe.

[0015] The beneficial effects of this invention are as follows: 1. Unlike existing technologies, this invention uses a backwash pipe to backwash clean water into the filtration mechanism for primary cleaning. Combined with an ultrasonic generator to produce high-frequency sound waves, the mechanical impact force generated by cavitation effect performs secondary cleaning on the filter screen and filter element. Furthermore, the impact of the water flow drives the blades and their scrapers to rotate, using the scrapers to remove resin and adhesive from the outside of the filter screen, achieving tertiary cleaning. Compared to traditional backwashing methods, this invention offers better cleaning results and extends the disassembly and maintenance cycle.

[0016] 2. Unlike existing technologies, this invention achieves magnetic levitation of the blades through the magnetic force between the first and second magnets, resulting in low friction on the blades. At this time, the annular nozzle impacts the blades, achieving rotational cleaning of the blades and the scraper blades on them. Compared with traditional bearing installation, the friction is even lower.

[0017] 3. Unlike existing technologies, this invention sets the filtration mechanism into two groups connected in series, thereby achieving graded filtration. Compared with the traditional parallel synchronous operation method, the filtration effect is better. In addition, a filter screen is set on the outside of the filter element, so the substances do not directly contact the filter element, which extends the service life of the filter element. The filter screen blocks resin and adhesive, reducing the load on the filter element. Attached Figure Description

[0018] Figure 1 This is a three-dimensional first-view schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional second-view schematic diagram of the overall structure of the present invention; Figure 3 This is a three-dimensional first-view schematic diagram of a partial structure of the present invention; Figure 4 This is a three-dimensional second-view schematic diagram of a partial structure of the present invention; Figure 5 This is a perspective view of the filtration mechanism of the present invention; Figure 6 This is a partial cross-sectional view of the filtering mechanism of the present invention; Figure 7 This is an exploded view of the filtration mechanism of the present invention; Figure 8 This is a perspective view of the self-cleaning component of the present invention; Figure 9 This is a perspective view of the ultrasonic cleaning mechanism of the present invention.

[0019] In the diagram: 1. Frame; 2. Electrical control box; 3. Filtration mechanism; 30. Return port; 31. Drain port; 32. Top cover; 33. Outer casing; 34. Bottom cover; 35. Water inlet; 36. Connecting ring; 37. Filtration assembly; 371. Filter screen; 372. Filter element; 373. Connecting rod; 374. Top fixing ring; 375. Bottom fixing ring; 376. Support block; 38. Self-cleaning assembly; 381. L-shaped arm; 382. Scraper; 383. Blade; 384. Fixed shaft; 385. Annular water pipe; 386. Nozzle; 387. Connecting pipe; 388. Magnet No. 1; 389. Magnet No. 2; 39. Base plate; 4. Outlet pipe No. 1; 5. Output pipe No. 1; 6. Manifold; 7. Return pipe; 8. Ultrasonic cleaning mechanism; 9. Inlet pipe No. 1; 81. Ultrasonic generator; 82. Connecting wire; 83. Ultrasonic generator head; 10. Drain pipe; 11. Output pipe No. 2; 12. Clamp; 13. Crossbeam; 14. Connecting pipe; 15. Outlet pipe No. 2; 16. Backflush pipe No. 1; 17. Backflush pipe No. 2; 18. Inlet pipe No. 2. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example: Please refer to Figure 1 and Figure 2 A water treatment device for paint production includes a frame 1, which provides a mounting base for various components. An electrical control box 2 is installed on the front side of the frame 1. Several crossbeams 13 are symmetrically arranged on the top and bottom of the frame 1. Eight filter mechanisms 3 are symmetrically arranged on the frame 1, and the eight filter mechanisms 3 are symmetrically divided into two groups. The filter mechanisms 3 are fixedly connected to the crossbeams 13 by clamps 12. The clamps 12 and the crossbeams 13 are fixed by screws, which realizes the overall detachable installation of the filter mechanism 3. An ultrasonic cleaning mechanism 8 is provided at the bottom of the frame 1 for cleaning the filter mechanism 3.

[0022] In use, the two sets of filter mechanisms 3 are connected in series. Sewage flows through the two sets of filter mechanisms 3 in sequence to achieve two-stage filtration. Compared with the traditional parallel synchronous filtration method, the filtration effect is better and effectively removes impurities and harmful substances from the sewage. Each set of filter mechanisms 3 works synchronously, which is highly efficient. The ultrasonic cleaning mechanism 8 is used to clean the inside of the filter mechanism 3 by using the mechanical impact force generated by the cavitation effect.

[0023] Please see Figure 1 , Figure 5 , Figure 6The filter mechanism 3 includes a housing 33 detachably connected inside the clamp 12. The top of the housing 33 is provided with an upper cover 32, and the bottom of the housing 33 is provided with a lower cover 34. The housing 33 is provided with a filter assembly 37, which is located between the upper cover 32 and the lower cover 34. The housing 33 is connected to the upper cover 32 and the lower cover 34 by threads, and the connection is provided with a sealing ring to prevent water leakage. The bottom of the filter assembly 37 is provided with a self-cleaning component 38 for cleaning. The top of the upper cover 32 is fixedly connected to a drain outlet 31, and the top side wall of the upper cover 32 is fixedly connected to a return outlet 30. The return outlet 30 passes through the top of the upper cover 32 and the housing 33 to balance the water pressure. The outer wall of the lower cover 34 is fixedly connected to a water inlet 35.

[0024] Please see Figure 6 and Figure 7 The filter assembly 37 includes three support blocks 376. A bottom fixing ring 375 is fixedly mounted on the top of each support block 376. Three connecting rods 373 are fixedly mounted on the top of the bottom fixing ring 375. A top fixing ring 374 is fixedly connected to the top of each connecting rod 373. A filter element 372 is installed inside the bottom fixing ring 375 and the top fixing ring 374 via screws. The filter element 372 is existing technology and will not be described in detail. The bottom fixing ring 375 and the top fixing ring 374... A filter screen 371 is fitted on the outside. A base plate 39 is fixedly connected to the bottom of the filter screen 371. Sealing rings are provided between the filter screen 371 and the top fixing ring 374, and between the filter screen 371 and the bottom fixing ring 375. A connecting ring 36 is fixedly installed on the top of the top fixing ring 374. The top of the connecting ring 36 is sealed and abutted against the bottom surface of the inner side of the top cover 32, ensuring that sewage enters the filter element 372 after passing through the filter screen 371. After being filtered by the filter element 372, it flows from the connecting ring 36 to the drain outlet 31 and is discharged.

[0025] Please see Figure 6 , Figure 7 and Figure 8The self-cleaning component 38 includes a second magnet 389 fixedly connected to the center of the bottom surface inside the lower cover 34. A fixing shaft 384 is fixedly installed at the top center of the second magnet 389. A first magnet 388 is movably sleeved on the outside of the fixing shaft 384. The first magnet 388 and the second magnet 389 have the same magnetism on opposite sides. A blade 383 is fixedly installed on the top of the first magnet 388. An annular water pipe 385 is fixedly installed on the edge of the bottom surface inside the lower cover 34. The top of the annular water pipe 385 is spirally fixedly connected to... The system has several nozzles 386, with the top of each nozzle 386 facing the blade 383, which allows the blade 383 to rotate via water flow. A connecting pipe 387 is fixedly connected to the side wall of the annular water pipe 385, and the connecting pipe 387 is fixedly connected to the inlet 35. Two L-shaped arms 381 are symmetrically installed on the top of the blade 383. Scrapers 382 are movably inserted into the vertical sections of the two L-shaped arms 381. The scrapers 382 are replaceable and can be easily replaced according to actual conditions. The scrapers 382 are attached to the outer wall of the filter screen 371.

[0026] In use, wastewater enters the connecting pipe 387 through the inlet 35, and after being diverted by the annular water pipe 385, it is sprayed out from the nozzle 386. The water flow impacts the blades 383, causing the blades 383 and the L-shaped arm 381 on them to rotate, which in turn drives the scraper 382 to rotate. The scraper 382 is used to scrape and clean the outer wall of the filter screen 371. After being flushed out from the nozzle 386, the wastewater is filtered by the filter screen 371 and enters the filter element 372. The filter element 372 is suspended by the bottom fixing ring 375 and the support block 376. Wastewater enters from the bottom of the filter element 372, and after filtration, it exits from the top of the filter element 372. The wastewater flows out from the outside of the filter screen 371 and then through the connecting ring 36 before being discharged from the drain outlet 31. Thus, the wastewater enters the interior from the outside of the filter screen 371 and undergoes preliminary filtration through the filter screen 371. This not only prevents the resin and adhesive in the water from directly contacting the filter element 372, extending the service life of the filter element 372, but also leaves impurities on the outside of the filter screen 371, making it easy to clean the filter screen 371 using the scraper 382. Furthermore, the magnetic repulsion between the first magnet 388 and the second magnet 389 ensures the magnetic levitation of the first magnet 388 and the blade 383, resulting in low friction and facilitating the rotation of the blade 383 by the impact of water flow.

[0027] Please see Figure 2 and Figure 9 The ultrasonic cleaning mechanism 8 includes an ultrasonic generator 81 fixedly connected to the bottom right side of the frame 1. A connecting cable 82 is plugged into the left side of the ultrasonic generator 81. The connecting cable 82 is detachably connected to an ultrasonic generator head 83, which is sealed and fixed inside the lower cover 34. In use, the ultrasonic generator 81 generates ultrasonic waves through the ultrasonic generator head 83. The ultrasonic waves enter the filter mechanism 3 and generate a cavitation effect. Combined with the backwashing of water flow and the self-cleaning of the self-cleaning component 38, it is beneficial to clean the inside of the filter mechanism 3 and reduce the residue inside the filter mechanism 3.

[0028] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 Each of the drain outlets 31 in the front filter mechanism 3 is fixedly connected to a second outlet pipe 15. The inlet outlets 35 in the front filter mechanism 3 are all fixedly connected to a first inlet pipe 9. A drain pipe 10 is fixedly connected to the first inlet pipe 9, and a valve is installed on the drain pipe 10. The tops of multiple second outlet pipes 15 are all fixedly connected to a second output pipe 11. A connecting pipe 14 is fixedly connected to the bottom of the second output pipe 11. A valve is fixedly installed in the middle of the connecting pipe 14. The end of the connecting pipe 14 furthest from the second output pipe 11 is fixedly connected to a second inlet pipe 18. The second inlet pipe 18 and... The inlet 35 of the filter mechanism 3 located on the rear side is fixedly connected. The return outlets 30 of the two sets of filter mechanisms 3 symmetrically located at the front and rear are fixedly connected to the manifold 6. The top of the multiple manifolds 6 are connected to the return pipe 7. The bottom of the return pipe 7 is fixedly connected to the second backwash pipe 17. A valve is installed on the second backwash pipe 17. The drain outlet 31 at the top of the filter mechanism 3 located on the rear side is fixedly connected to the first outlet pipe 4. The top of the multiple first outlet pipes 4 are fixedly connected to the first output pipe 5. The first output pipe 5 is fixedly connected to the first backwash pipe 16, and a valve is installed at the right end of the first output pipe 5.

[0029] In operation, external sewage enters the front filter mechanism 3 through the No. 1 inlet pipe 9, where it undergoes primary filtration. The filtered sewage then flows through the No. 2 outlet pipe 15 into the No. 2 outlet pipe 11, and subsequently through the connecting pipe 14 into the No. 2 inlet pipe 18. From there, it enters the rear filter mechanism 3 for secondary filtration, achieving two-stage filtration. Compared to parallel single-stage filtration, this method offers better filtration efficiency. The secondary-filtered sewage then flows through the No. 1 outlet pipe 4 into the No. 1 outlet pipe 5, and is subsequently discharged from the No. 1 outlet pipe 5. The sewage discharge pipe 10, the No. 1 backflushing pipe 16, and the No. 2 backflushing pipe 17 are used to transport clean water to the equipment during the cleaning process. During preparation, the pipes and filter mechanism 3 are backwashed. When the water pressure is too high, some sewage will flow back from the return port 30 and the return pipe 7 to avoid damage to the equipment due to excessive water pressure. During the backwashing process, clean water enters from the No. 1 backwash pipe 16 and the No. 2 backwash pipe 17 respectively. The clean water in the No. 2 backwash pipe 17 enters the return port 30 from the manifold 6. After rinsing the filter screen 371, it enters the drain pipe 10 and is discharged. The clean water entering from the No. 1 backwash pipe 16 enters the rear filter mechanism 3 through the No. 1 output pipe 5. Then, it enters the front filter mechanism 3 through the No. 2 inlet pipe 18, the connecting pipe 14, the No. 2 output pipe 11 and the No. 2 outlet pipe 15. After cleaning, it is discharged from the drain pipe 10, thus realizing the backwashing of the equipment.

[0030] It should be noted that, in the operation of this paint production water treatment device, the first inlet pipe 9 is connected to the sewage pipe. After pretreatment such as separation collection, pretreatment, organic matter degradation, and heavy metal removal, the sewage enters the front filter mechanism 3 through the first inlet pipe 9. The filter mechanism 3 performs primary filtration of the sewage. The filtered sewage enters the second outlet pipe 11 through the second outlet pipe 15, and then enters the second inlet pipe 18 through the connecting pipe 14. Subsequently, it enters the rear filter mechanism 3 through the second inlet pipe 18 for secondary filtration. This achieves two-stage filtration, resulting in better filtration. Some sewage is returned through the return port 30 and return pipe 7 to prevent damage to the equipment due to excessive water pressure. During sewage filtration, the water flow impacts the blades 383, causing the blades 383 and their L-shaped arms 381 to rotate, simultaneously driving the scraper blades 382 to rotate. The filter screen 371 is cleaned by scraping the outer wall with the scraper 382, ​​reducing the residue of impurities on the filter screen 371. When the inside of the equipment needs to be cleaned, the No. 1 backflushing pipe 16 and the No. 2 backflushing pipe 17 are connected to the clean water pipe. The valves on the drain pipe 10, the No. 1 backflushing pipe 16 and the No. 2 backflushing pipe 17 are opened, and the No. 1 backflushing pipe 16 and the No. 2 backflushing pipe 17 enter the equipment. At this time, the ultrasonic cleaning mechanism 8 is activated. The ultrasonic cavitation effect of the ultrasonic cleaning mechanism 8 and the backflushing are combined with the self-cleaning component 38 to perform backflushing cleaning. The sewage is discharged from the drain pipe 10. At the same time, the drain pipe 10 can also be reversed to allow clean water to be introduced in the opposite direction, which can also perform backflushing. When water enters from the drain pipe 10, it can drive the scraper 382 in the filter mechanism 3 to rotate and scrape, further improving the cleaning effect and cleaning the impurities, glue and resin remaining in the filter mechanism 3, reducing the frequency of disassembly and cleaning of the filter mechanism 3.

[0031] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A water treatment device for paint production, comprising a frame (1), characterized in that: The frame (1) is equipped with an electrical control box (2) on the front side, and several crossbeams (13) are arranged on the top and bottom of the frame (1). Several filter mechanisms (3) are arranged on the frame (1). The multiple filter mechanisms (3) are symmetrically divided into two groups in front and back. The filter mechanisms (3) are fixedly connected to the crossbeams (13) by clamps (12). Also includes: An ultrasonic cleaning mechanism (8) is provided at the bottom of the frame (1) for cleaning the filter mechanism (3). The filter mechanism (3) includes a housing (33) detachably connected inside the clamp (12). A top cover (32) is provided on the top of the housing (33), and a bottom cover (34) is provided on the bottom of the housing (33). A filter assembly (37) is provided inside the housing (33). The filter assembly (37) is located between the top cover (32) and the bottom cover (34). A self-cleaning component (38) is provided at the bottom of the filter assembly (37) for cleaning the filter assembly (37).

2. The water treatment device for paint production according to claim 1, characterized in that: The top of the upper cover (32) is fixedly connected to a drain outlet (31), the top side wall of the upper cover (32) is fixedly connected to a return outlet (30), and the outer wall of the lower cover (34) is fixedly connected to a water inlet (35).

3. The water treatment device for paint production according to claim 2, characterized in that: The filter assembly (37) includes several support blocks (376), and a bottom fixing ring (375) is fixedly installed on the top of the multiple support blocks (376). Several connecting rods (373) are fixedly installed on the top of the bottom fixing ring (375), and a top fixing ring (374) is fixedly connected to the top of the multiple connecting rods (373).

4. The water treatment device for paint production according to claim 3, characterized in that: The bottom fixing ring (375) and the top fixing ring (374) are detachably installed with a filter element (372). The bottom fixing ring (375) and the top fixing ring (374) are fitted with a filter screen (371). The bottom of the filter screen (371) is fixedly connected to a base plate (39). The top of the top fixing ring (374) is fixedly installed with a connecting ring (36). The top of the connecting ring (36) is sealed and abuts against the bottom surface inside the top cover (32).

5. A water treatment device for paint production according to claim 1, characterized in that: The self-cleaning component (38) includes a second magnet (389) fixedly connected to the center of the bottom surface inside the lower cover (34). A fixed shaft (384) is fixedly installed at the center of the top of the second magnet (389). A first magnet (388) is movably sleeved on the outside of the fixed shaft (384). The first magnet (388) and the second magnet (389) have the same magnetism on opposite sides. A blade (383) is fixedly installed on the top of the first magnet (388). An annular water pipe (385) is fixedly installed on the edge of the bottom surface inside the lower cover (34). Several nozzles (386) are fixedly connected to the top of the annular water pipe (385) in a spiral shape. A connecting pipe (387) is fixedly connected to the side wall of the annular water pipe (385). The connecting pipe (387) is fixedly connected to the inner wall of the water inlet (35).

6. A water treatment device for paint production according to claim 5, characterized in that: Two L-shaped arms (381) are symmetrically installed on the top of the blade (383). The vertical sections of the two L-shaped arms (381) are detachably equipped with scraper strips (382), which are attached to the outer wall of the filter screen (371).

7. The water treatment device for paint production according to claim 1, characterized in that: The ultrasonic cleaning mechanism (8) includes an ultrasonic generator (81) fixedly connected to the bottom right side of the frame (1). A connecting wire (82) is plugged into the left side of the ultrasonic generator (81). The connecting wire (82) is detachably connected to an ultrasonic generator head (83). The ultrasonic generator head (83) is located inside the lower cover (34).

8. A water treatment device for paint production according to claim 1, characterized in that: The drain outlet (31) of the filter mechanism (3) located on the front side is fixedly connected to the No. 2 water outlet pipe (15). The inlet (35) of the filter mechanism (3) located on the front side is fixedly connected to the No. 1 water inlet pipe (9). The No. 1 water inlet pipe (9) is fixedly connected to the sewage pipe (10). The top of the multiple No. 2 water outlet pipes (15) is fixedly connected to the No. 2 output pipe (11). The bottom of the No. 2 output pipe (11) is fixedly connected to the connecting pipe (14). A valve is fixedly installed in the middle of the connecting pipe (14). The end of the connecting pipe (14) away from the No. 2 output pipe (11) is fixedly connected to the No. 2 water inlet pipe (18). The No. 2 water inlet pipe (18) is fixedly connected to the inlet (35) of the filter mechanism (3) located on the rear side.

9. A water treatment device for paint production according to claim 2, characterized in that: The return ports (30) of the two sets of symmetrical filter mechanisms (3) are connected to a common manifold (6), the top of the multiple manifolds (6) are connected to a common return pipe (7), and the bottom of the return pipe (7) is connected to a second backflushing pipe (17).

10. A water treatment device for paint production according to claim 1, characterized in that: The drain outlet (31) at the top of the filter mechanism (3) located on the rear side is fixedly connected to a No. 4 water outlet pipe. The tops of multiple No. 1 water outlet pipes (4) are fixedly connected to a No. 5 output pipe. A No. 1 backwash pipe (16) is fixedly connected to the No. 1 output pipe (5).

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