Circulating water purification device of environment-friendly dry-type circulating paint spray booth

Abstract

The invention relates to the technical field of sewage treatment, in particular to a circulating water purification device of an environment-friendly dry-type circulating paint spray booth, which comprises a water circulating tank, a scum collecting assembly and a circulating treatment assembly, a treatment box is arranged on one side of the water circulating tank, a treatment cavity is formed in the treatment box, and when scum in the water circulating tank is accumulated on the water surface, the scum collecting assembly is communicated with the treatment cavity; water flow in the water circulation tank is circularly sucked through the circular treatment assembly, then the water flow and scum are driven to move towards one side of the overturning collection shovel, and then the scum is accumulated on the overturning collection shovel under the pushing action of the water flow and then overturned by the overturning collection shovel to be poured into the scum treatment barrel of the treatment cavity. The water-containing scum is dewatered and dried, the size and the water content of the scum are reduced, unified collection is conducted in the later period, in addition, the circulating treatment assembly is matched with the scum treatment barrel, circulating water in the water circulating tank can be filtered and maintained, and operation is free of worry.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to a circulating water purification device for an environmentally friendly dry-cycle paint spraying room. Background Art

[0002] The paint spraying room is a special environmental equipment designed for painting operations. The working space is enclosed by the room body, and filtered clean air is introduced with the help of the air supply system. The exhaust system cooperates with the paint mist treatment device (such as dry filtration or wet water curtain, etc.) to promptly discharge the paint mist and exhaust gas generated during the painting process to ensure the health of the operators. During the paint mist water treatment, the paint mist will be discharged into the sewage pool after separation, and then the water surface of the sewage pool will flocculate and accumulate. The operator will clean it during or after the work;

[0003] The existing utility model with publication number CN211004823U discloses a water circulation device for a high-pressure water rotary cabinet, which also includes a siphon mechanism and a filtering mechanism, which automatically siphons and filters the water adsorbed with high-molecular organic matter in the water tank according to the water level in the water tank; the clean water after filtration in the replenishment tank is recycled and reused, and is driven by a second driving device to re-enter the water rotary cabinet to adsorb high-molecular organic matter in organic waste gas. The above scheme filters the circulating water through an additional wastewater tank provided with a filter plate, but cannot effectively treat the paint residue suspended and accumulated on the surface of the water body. When the operator removes it in the later stage, the paint residue has a large water content, which occupies storage space and affects the efficiency of subsequent processing, making it inconvenient to use. Summary of the Invention

[0004] The object of the present invention is to provide a circulating water purification device for an environmentally friendly dry-cycle paint spraying room to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a circulating water purification device for an environmentally friendly dry-cycle paint spraying room, comprising:

[0006] A water circulation tank, one side of which is provided with a processing box, a processing chamber is opened in the processing box, the processing box is located above the processing chamber and is connected to a conical collecting tank, a processing assembly is rotated in the processing chamber, and the processing assembly includes a scum processing barrel and a filter cloth;

[0007] A scum collecting assembly is movably arranged on one side above the processing box, and includes a flip collecting shovel;

[0008] A circulation processing component is provided with a collecting chamber at the lower end of the processing box. The circulation processing component includes a circulating liquid pipe and a filter cover. The circulating liquid pipe is horizontally inserted into the collecting chamber. The filter cover is provided at one end of the circulating liquid pipe and inserted into the water circulation tank.

[0009] Preferably, a water flow baffle is vertically provided on one side of the water circulation tank close to the treatment box, and the height of the water flow baffle is lower than the liquid level. Two positioning pins are horizontally symmetrically provided on both sides of the upper end of the treatment box close to the water circulation tank. One side of the flip collecting shovel is respectively rotated to socket the two positioning pins. A torsion spring is provided on the side of the flip collecting shovel socketed with the positioning pins. The side of the flip collecting shovel away from the treatment box is inserted into the water circulation tank, and the lower end surface of the flip collecting shovel is lower than the liquid level in the water circulation tank.

[0010] Preferably, a winding box is horizontally provided on the side of the processing box away from the water circulation tank, and two winding wheels are respectively provided on both sides of the winding box. Collection ropes are respectively wound around the two winding wheels, and one end of the collection rope away from the winding wheel is connected to the upper end of the flip collection shovel away from the processing box.

[0011] Preferably, a bearing ring is provided at the center of the lower end of the processing chamber, and the slag processing barrel is rotated and inserted into the bearing ring through a sealed bearing. An internal gear ring is provided at the lower end of the slag processing barrel, and a driving gear is provided at the lower end of the processing chamber. One side of the driving gear is engaged with the teeth of the internal gear ring, and a number of auxiliary wheels are provided in a circular array at the lower end of the slag processing barrel.

[0012] Preferably, a plurality of first through holes are opened through the scum processing barrel, and the upper end and the lower end of the scum processing barrel are both provided with press-fit threaded rings through threaded installation. The filter cloth is vertically arranged in the scum processing barrel through the two press-fit threaded rings, and the outer side surface of the press-fit threaded ring is in contact with the inner circumference of the scum processing barrel.

[0013] Preferably, a through hole is provided in the center of the lower end of the processing chamber, which is connected to the collection chamber. The lower end of the slag processing barrel is a conical structure. A slag dropping pipe is vertically connected to the center of the lower end of the slag processing barrel. The lower end of the slag dropping pipe is rotated and inserted into the through hole.

[0014] Preferably, the circulating liquid pipe is located below the slag dropping pipe and is vertically provided with a staggered welded pipe. The diameter of the staggered welded pipe is smaller than the inner diameter of the circulating liquid pipe. The staggered welded pipe is divided into a gas conversion zone and a piston zone by a constraint ring zone. A lifting piston is provided in the piston zone. A piston connecting rod is vertically provided at the center of the upper end of the lifting piston. The upper end of the piston connecting rod is movably passed through the staggered welded pipe and is rotatably sleeved with a sealing piston through a bearing. The diameter of the sealing piston is the same as the inner diameter of the slag dropping pipe.

[0015] Preferably, an extension air pipe is horizontally provided on one side of the staggered welded pipe located in the circulating liquid pipe, the extension air pipe is connected to the gas conversion zone and is provided with a one-way valve, one end of the extension air pipe is placed in the filter cover, and a plurality of second through holes are opened on the side of the extension air pipe located in the filter cover, and a first nozzle and a second nozzle are respectively provided on the upper and lower sides outside the circulating liquid pipe, and the first nozzle and the second nozzle are respectively connected to the gas conversion zone and the piston zone.

[0016] Preferably, a support connecting pipe is horizontally inserted through the processing box on one side of the processing chamber, a blow-off box is vertically provided on one side of the support connecting pipe located in the processing chamber, a first diversion groove is provided on one side of the blow-off box connected to the support connecting pipe, a plurality of third through holes are provided on the side of the first diversion groove close to the slag processing barrel, a second diversion groove is horizontally provided on one side of the processing box located at the conical collecting groove, a plurality of oblique blowing holes are provided at the lower end of the second diversion groove, and the plurality of oblique blowing holes respectively point to the slag dropping pipe, a third nozzle is provided on one side of the second diversion groove, and the third nozzle, the support connecting pipe and the first nozzle are arranged with the same gas source.

[0017] Preferably, an electric-controlled valve is provided at the upper end of the circulating liquid pipe connected to the lower end of the processing chamber, the flow inner diameter of the electric-controlled valve is smaller than the inner diameter of the circulating liquid pipe, and a collection box is horizontally inserted in the collection chamber of the processing box, and the collection box and the circulating liquid pipe are staggered and matched.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the scum in the water circulation tank accumulates on the water surface, the circulation treatment component circulates and sucks the water flow in the water circulation tank, thereby driving the water flow and scum to move to the side of the flip collection shovel. Then, under the push of the water flow, the scum accumulates on the flip collection shovel, and is then flipped and dumped into the scum treatment barrel in the treatment chamber by the flip collection shovel. The water-containing scum is dehydrated and dried to reduce the volume and water content of the scum, and is then collected uniformly at a later stage. In addition, the circulation treatment component, in addition to cooperating with the scum treatment barrel, can also filter and maintain the circulating water in the water circulation tank, making operation worry-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0022] Figure 3 This is a schematic diagram of the partial episiotomy structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of part B;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the C part;

[0025] Figure 6 For the present invention Figure 4 Schematic diagram of the D part;

[0026] Figure 7 For the present invention Figure 4 Schematic diagram of part E;

[0027] Figure 8 This is a schematic diagram of the side cut of the flip collection shovel connected to the present invention;

[0028] Figure 9 For the present invention Figure 8 Schematic diagram of the F part;

[0029] Figure 10 This is a schematic diagram of the slag treatment barrel structure from a first perspective of the present invention;

[0030] Figure 11 This is a schematic diagram of the slag treatment barrel structure from a second perspective of the present invention;

[0031] Figure 12 This is a schematic diagram of the circulating liquid pipe and the collecting box being separated from each other.

[0032] In the figure: water circulation trough 1, processing chamber 2, water flow baffle 3, conical collecting trough 4, flip collecting shovel 5, positioning shaft pin 6, torsion spring 7, winding wheel 8, collecting rope 9, slag processing barrel 10, filter cloth 11, press-fit threaded ring 12, bearing collar 13, internal gear ring 14, drive gear 15, auxiliary wheel 16, slag dropping pipe 17, circulating liquid pipe 18, filter cover 19, staggered welded pipe 20, extended air pipe 21, air transfer area 22, piston area 23, piston connecting rod 24, lifting piston 25, blocking piston 26, first connecting nozzle 27, second connecting nozzle 28, one-way valve 29, electric control valve 30, support connecting pipe 31, blow-off box 32, first diverter trough 33, second diverter trough 34, oblique blowing hole 35, third connecting nozzle 36, collecting box 37. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Please see the attached Figure 1-12 , this application provides the following technical solutions.

[0035] Embodiment 1: A circulating water purification device for an environmentally friendly dry-cycle paint spraying room, comprising a water circulation tank 1, a treatment box being provided on one side of the water circulation tank 1, a treatment chamber 2 being opened in the treatment box, the treatment box being located above the treatment chamber 2 and connected to a conical collecting tank 4, a treatment component being rotatably provided in the treatment chamber 2, the treatment component comprising a scum treatment barrel 10 and a filter cloth 11, a water flow baffle 3 being vertically provided on one side of the water circulation tank 1 close to the treatment box, the height of the water flow baffle 3 being lower than the liquid level, when circulating water is pumped on one side of the treatment box, the water flow on the side of the water circulation tank 1 away from the water flow baffle 3 will drive the floating paint scum on the water surface to flow toward the side of the treatment box, and with the cooperation of the water flow baffle 3, the water flow is accelerated at a position close to the water surface, and the scum will have a driving force on this side, causing the scum to accumulate.

[0036] A scum collection assembly is provided to collect the scum into the processing chamber 2. The scum collection assembly is movably provided on one side above the processing box. The scum collection assembly includes a flip collection shovel 5. Two positioning pins 6 are horizontally and symmetrically provided on both sides of the upper end of the processing box near the water circulation tank 1. One side of the flip collection shovel 5 is respectively rotated to sleeve the two positioning pins 6. A torsion spring 7 is provided on the side of the flip collection shovel 5 sleeved with the positioning pins 6. The side of the flip collection shovel 5 away from the processing box is inserted into the water circulation tank 1, and the lower end surface of the flip collection shovel 5 is lower than the liquid level in the water circulation tank 1. A winding box is horizontally provided on the side of the processing box away from the water circulation tank 1. Two winding wheels 8 are provided on both sides of the winding box. The wheels 8 are respectively wound with collecting ropes 9, and the end of the collecting rope 9 away from the winding wheel 8 is connected to the upper end of the flip collecting shovel 5 away from the processing box. The conical collecting trough 4 has a structure with a large opening at the upper end and a narrow opening at the lower end. When the existing servo control motor drives the two winding wheels 8 to rotate, the two winding wheels 8 reel in the two collecting ropes 9. At this time, the mixture of water and scum accumulated on the upper end of the flip collecting shovel 5 is rotated along the positioning shaft pin 6 and poured into the conical collecting trough 4 and the processing chamber 2 by the flip collecting shovel 5. Then the winding wheel 8 is unwound, and the flip collecting shovel 5 is reset and inserted into the water circulation tank 1 under the torsion of the torsion spring 7, waiting for the scum to slowly fill up the flip collecting shovel 5.

[0037] A bearing ring 13 is provided at the center of the lower end of the processing chamber 2. The slag processing barrel 10 is rotated and inserted into the bearing ring 13 through a sealed bearing. An internal gear ring 14 is provided at the lower end of the slag processing barrel 10. A driving gear 15 is provided at the lower end of the processing chamber 2. One side of the driving gear 15 is engaged with the teeth of the internal gear ring 14 and is connected. A plurality of auxiliary wheels 16 are provided in an annular array at the lower end of the slag processing barrel 10. A plurality of first through holes are opened on the slag processing barrel 10. A press-fit threaded ring 12 is provided at the upper end and the lower end of the slag processing barrel 10 through a threaded installation. The filter cloth 11 is provided through two press-fit threads. The ring 12 is vertically arranged in the scum treatment barrel 10, and the outer side surface of the press-fit threaded ring 12 is in contact with the inner circumference of the scum treatment barrel 10. The scum and water entering the treatment chamber 2 from the conical collecting trough 4 enter the scum treatment barrel 10 through the narrow opening below the conical collecting trough 4. At this time, the driving gear 15 is driven to rotate by the servo waterproof motor to control the scum treatment barrel 10 to rotate at high speed in the treatment chamber 2. At this time, the water in the scum is centrifugally thrown to the inner wall of the filter cloth 11, and then discharged from the first through hole of the scum treatment barrel 10 into the lower part of the treatment chamber 2 for collection. The dry scum falls freely or adheres to the surface of the filter cloth 11 in small amounts.

[0038] A circulation treatment component is set to filter and treat the water circulating in the water circulation tank 1. A collection chamber is opened at the lower end of the treatment box. The circulation treatment component includes a circulation liquid pipe 18 and a filter cover 19. The circulation liquid pipe 18 is horizontally inserted into the collection chamber. The filter cover 19 is provided at one end of the circulation liquid pipe 18 and is inserted into the water circulation tank 1. A through hole is provided in the center of the lower end of the treatment chamber 2 and connected to the collection chamber. The lower end of the scum treatment barrel 10 is a conical structure. The center of the lower end of the scum treatment barrel 10 is vertically connected to a slag dropping pipe 17. The lower end of the slag dropping pipe 17 is rotated to penetrate the through hole. The circulation liquid pipe 18 is connected to the paint mist water treatment equipment of the paint spraying room. The water in the water circulation tank 1 is pumped out by a pump to form a flow of water and slag in the water circulation tank 1. The filter cover 19 can filter tiny particles.

[0039] The circulating liquid pipe 18 is located below the slag dropping pipe 17 and is vertically provided with a staggered welded pipe 20. The diameter of the staggered welded pipe 20 is smaller than the inner diameter of the circulating liquid pipe 18. The staggered welded pipe 20 is divided into a gas conversion zone 22 and a piston zone 23 by a constraint ring. A lifting piston 25 is provided in the piston zone 23. The upper end center of the lifting piston 25 is vertically provided with a piston connecting rod 24. The upper end of the piston connecting rod 24 is movable through the staggered welded pipe 20 and is rotatably sleeved with a blocking piston 26 through a bearing. The diameter of the blocking piston 26 is the same as the inner diameter of the slag dropping pipe 17. An extension air pipe 21 is horizontally provided on one side of the staggered welded pipe 20 located in the circulating liquid pipe 18. The extension air pipe 21 is connected to the gas conversion zone 22 and is provided with a one-way valve 29. One end of the extension air pipe 21 is placed in the filter cover 19. The side of the extension air pipe 21 placed in the filter cover 19 is connected to a plurality of second through holes. The staggered welded pipe 20 is located in the circulating liquid pipe 18 and is horizontally provided with a extension air pipe 21. The extension air pipe 21 is connected to the gas conversion zone 22 and is provided with a one-way valve 29. One end of the extension air pipe 21 is placed in the filter cover 19. The side of the extension air pipe 21 placed in the filter cover 19 is connected to a plurality of second through holes. A first connection nozzle 27 and a second connection nozzle 28 are respectively provided on the upper and lower sides outside the liquid pipe 18. The first connection nozzle 27 and the second connection nozzle 28 are respectively connected to the gas conversion area 22 and the piston area 23. When the scum processing barrel 10 normally participates in the centrifugal dehydration operation of the scum, the blocking piston 26 is inserted into the scum dropping pipe 17 and is flush with the bottom of the scum processing barrel 10. In this way, the scum entering the scum processing barrel 10 can be spread on the surface of the filter cloth 11 under the action of centrifugation. After the scum dehydration is completed, high-pressure fluid is injected through the first connection nozzle 27, and the blocking piston 26 can be separated from the scum dropping pipe 17. The drier scum in the scum processing barrel 10 falls from the scum dropping pipe 17. When the blocking piston 26 is plugged into the scum dropping pipe 17, the scum processing barrel 10 and the scum dropping pipe 17 rotate, which can drive the blocking piston 26 to rotate along the piston connecting rod 24, without excessive wear of the blocking piston 26 and the lifting piston 25.

[0040] Embodiment 2: On the basis of embodiment 1, a support connecting pipe 31 is horizontally inserted through the processing box on one side of the processing chamber 2, and a blow-off box 32 is vertically provided on one side of the support connecting pipe 31 located in the processing chamber 2. A first diverter groove 33 is provided on one side of the blow-off box 32, and a plurality of third through holes are provided on the side of the first diverter groove 33 close to the slag processing barrel 10. A second diverter groove 34 is horizontally provided on one side of the conical collecting groove 4 in the processing box, and a plurality of oblique blowing holes 35 are provided at the lower end of the second diverter groove 34, and the plurality of oblique blowing holes 35 are respectively directed to the slag dropping pipe 17. A third connecting nozzle 36 is provided on one side of the second diverter groove 34, and the third connecting nozzle 36. The support connecting pipe 31 and the first connecting nozzle 27 are arranged with the air source. A blow-off box 32 is provided to blow high-pressure air from the outside of the flip collecting shovel 5. At this time, the high-pressure airflow blows off the dry scum on the inner surface of the filter cloth 11 to avoid clogging the filter cloth 11. At the same time, a part of the high-pressure airflow enters the second diverter trough 34 through the third connecting nozzle 36, and then cooperates with a plurality of oblique blowing holes 35 to make the fallen scum fall steadily from the scum dropping pipe 17. When the second diverter trough 34 and the first diverter trough 33 send high-pressure airflow into the flip collecting shovel 5, another part of the air source pushes the lifting piston 25 from the first connecting nozzle 27, so that the blocking piston 26 is separated from the scum dropping pipe 17, so that the scum processing barrel 10 is connected to the collection chamber;

[0041] In addition, when the air flow supplied is greater than the discharge volume of the first diversion groove 33 and the second diversion groove 34, the high-pressure air flow can push the one-way valve 29 into the extended air pipe 21, and then aerate the interior of the filter cover 19 through the second through hole to clear the possible blockage of the filter cover 19.

[0042] An electric-controlled valve 30 is provided at the upper end of the circulating liquid pipe 18, which is connected to the lower end of the processing chamber 2. The flow inner diameter of the electric-controlled valve 30 is smaller than the inner diameter of the circulating liquid pipe 18. When too much water is separated from the slag in the processing chamber 2, the electric-controlled valve 30 is controlled by the PLC to connect the processing chamber 2 and the circulating liquid pipe 18. When the circulating liquid pipe 18 draws the circulating water in the water circulation tank 1 and the flow rate reaches a certain level, the circulating liquid pipe 18 will synchronously draw the water in the processing chamber 2 for recycling.

[0043] The scum falling from the scum dropping pipe 17 is collected by the first receiving nozzle 27 to reduce the water content and occupied volume of the scum.

[0044] A collecting box 37 is inserted horizontally into the collecting chamber of the processing box. The collecting box 37 is staggered with the circulating liquid pipe 18.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A circulating water purification device for an environmentally friendly dry cycle paint spraying room, characterized in that: include: A water circulation tank (1) is provided on one side of the water circulation tank (1), a processing box is provided on the upper portion of the processing box, a processing chamber (2) is provided on the upper portion of the processing box, the processing box is located above the processing chamber (2) and is in communication with a conical collecting tank (4), a processing assembly is rotatably provided in the processing chamber (2), and the processing assembly includes a scum processing bucket (10) and a filter cloth (11); A scum collecting assembly, the scum collecting assembly being movably arranged on one side above the processing box, and comprising a flip collecting shovel (5); A circulation treatment component is provided, wherein a collecting chamber is provided at the lower end of the treatment box. The circulation treatment component comprises a circulation liquid pipe (18) and a filter cover (19). The circulation liquid pipe (18) is horizontally inserted into the collecting chamber. The filter cover (19) is provided at one end of the circulation liquid pipe (18) and inserted into the water circulation tank (1).

2. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 1 is characterized by: A water flow baffle (3) is vertically provided on one side of the water circulation tank near the treatment box, and the height of the water flow baffle (3) is lower than the liquid level. Two positioning shaft pins (6) are horizontally and symmetrically provided on both sides of the upper end of the treatment box near the water circulation tank (1). One side of the flip collection shovel (5) is respectively rotatably sleeved with the two positioning shaft pins (6). A torsion spring (7) is provided on the side of the flip collection shovel (5) sleeved with the positioning shaft pins (6). The side of the flip collection shovel (5) away from the treatment box is inserted into the water circulation tank (1), and the lower end surface of the flip collection shovel (5) is lower than the liquid level in the water circulation tank (1).

3. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 2 is characterized in that: A winding box is horizontally provided on one side of the treatment box away from the water circulation tank (1), and two winding wheels (8) are respectively provided on both sides of the winding box. A collecting rope (9) is respectively wound around the two winding wheels (8), and one end of the collecting rope (9) away from the winding wheel (8) is connected to the upper end of the flip collection shovel (5) away from the treatment box.

4. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 3 is characterized by: A bearing ring (13) is provided at the center of the lower end of the processing chamber (2); the slag processing barrel (10) is rotatably inserted into the bearing ring (13) through a sealed bearing; an inner gear ring (14) is provided at the lower end of the slag processing barrel (10); a driving gear (15) is provided at the lower end of the processing chamber (2); one side of the driving gear (15) is meshed with the teeth of the inner gear ring (14); and a plurality of auxiliary wheels (16) are provided in an annular arrangement at the lower end of the slag processing barrel (10).

5. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 4 is characterized in that: The scum treatment barrel (10) is provided with a plurality of first through holes, and the upper end of the scum treatment barrel (10) and the lower end of the scum treatment barrel (10) are both provided with press-fit threaded rings (12) through threaded installation, and the filter cloth (11) is vertically arranged in the scum treatment barrel (10) through the two press-fit threaded rings (12), and the outer side surface of the press-fit threaded ring (12) is in contact with the inner peripheral side of the scum treatment barrel (10).

6. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 5, characterized in that: A through hole is provided at the center of the lower end of the processing chamber (2) and connected to the collection chamber. The lower end of the slag processing barrel (10) is a conical structure. A slag dropping pipe (17) is vertically connected to the center of the lower end of the slag processing barrel (10). The lower end of the slag dropping pipe (17) is rotated and inserted into the through hole.

7. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 6, characterized in that: The circulating liquid pipe (18) is located below the slag dropping pipe (17) and is vertically provided with a staggered welded pipe (20). The diameter of the staggered welded pipe (20) is smaller than the inner diameter of the circulating liquid pipe (18). The staggered welded pipe (20) is divided into a gas conversion zone (22) and a piston zone (23) through a constraint ring zone. A lifting piston (25) is provided in the piston zone (23). A piston connecting rod (24) is vertically provided at the center of the upper end of the lifting piston (25). The upper end of the piston connecting rod (24) movably passes through the staggered welded pipe (20) and is rotatably sleeved with a blocking piston (26) through a bearing. The diameter of the blocking piston (26) is the same as the inner diameter of the slag dropping pipe (17).

8. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 7, characterized in that: An extension air pipe (21) is horizontally provided on one side of the staggered welded pipe (20) located in the circulating liquid pipe (18); the extension air pipe (21) is connected to the gas conversion zone (22) and is provided with a one-way valve (29); one end of the extension air pipe (21) is placed in the filter cover (19); the side of the extension air pipe (21) located in the filter cover (19) is connected to a plurality of second through holes; the staggered welded pipe (20) is provided with a first nozzle (27) and a second nozzle (28) on the upper and lower sides outside the circulating liquid pipe (18), respectively; the first nozzle (27) and the second nozzle (28) are respectively connected to the gas conversion zone (22) and the piston zone (23).

9. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 8, characterized in that: A support connecting pipe (31) is horizontally inserted through the processing box on one side of the processing chamber (2); a blow-off box (32) is vertically provided on one side of the support connecting pipe (31) located in the processing chamber (2); a first diverter trough (33) is provided on one side of the blow-off box (32) and connected to the support connecting pipe (31); a plurality of third through holes are provided on the side of the first diverter trough (33) close to the slag processing barrel (10); a second diverter trough (34) is horizontally provided on one side of the processing box located at the conical collecting trough (4); a plurality of oblique blowing holes (35) are provided at the lower end of the second diverter trough (34); the plurality of oblique blowing holes (35) are respectively directed to the slag dropping pipe (17); a third connecting nozzle (36) is provided on one side of the second diverter trough (34); and the third connecting nozzle (36), the support connecting pipe (31) and the first connecting nozzle (27) are arranged with the same gas source.

10. The circulating water purification device for an environmentally friendly dry-cycle paint spray booth according to claim 9, characterized in that: An electric control valve (30) is provided at the upper end of the circulating liquid pipe (18) and the lower end of the processing chamber (2) is connected. The inner diameter of the electric control valve (30) is smaller than the inner diameter of the circulating liquid pipe (18). A collecting box (37) is horizontally inserted in the collecting chamber of the processing box. The collecting box (37) and the circulating liquid pipe (18) are arranged in a staggered manner.

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