Zero-agent treatment system for painting wastewater

Abstract

The present application relates to the technical field of paint spray booth, and discloses a coating wastewater zero-agent treatment system, which comprises a paint spraying main mechanism, an exhaust mechanism is arranged on one side of the paint spraying main mechanism, a modified water storage mechanism is installed on one side of the exhaust mechanism, a water curtain mechanism is installed above the exhaust mechanism, and the water curtain mechanism and the modified water storage mechanism are both located inside the paint spraying main mechanism, a turbulence mechanism is installed in the exhaust mechanism, a paint mist capturing mechanism is arranged at the bottom of one side of the paint spraying main mechanism and located at the bottom of the exhaust mechanism, and a flow guide mechanism is arranged in the paint mist capturing mechanism. The coating wastewater zero-agent treatment system can capture a large amount of scattered paint mist that is not attached to workpieces during paint spraying operation, improve safety, reduce subsequent environmental pressure, easily fish paint slag, easily separate, and does not need to frequently replace water, thereby reducing use cost.

Description

Technical Field

[0001] This invention relates to the field of spray booth technology, specifically to a zero-chemical treatment system for coating wastewater. Background Technology

[0002] A spray booth, as the name suggests, is a room where filtered paint is applied to the object being painted. Also called a paint baking booth, a spray booth provides a dedicated environment for painting operations, meeting the requirements for temperature, humidity, light intensity, and air cleanliness. It effectively limits and treats the paint mist and organic waste gases generated during spraying before releasing them, making it an environmentally friendly painting equipment.

[0003] Traditional spray painting involves applying paint to equipment in the open air using spray nozzles, which generates a large amount of paint mist that drifts into the air. This paint mist can spread with the airflow and pollute the air. If inhaled by workers, it can be harmful to their health. Therefore, a zero-chemical wastewater treatment system for painting is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a zero-chemical treatment system for coating wastewater, which solves the problems mentioned in the background.

[0005] This invention provides the following technical solution: a zero-chemical treatment system for coating wastewater, comprising: a main spraying unit, an exhaust system on one side of the main spraying unit, a modified water storage system on one side of the exhaust system, a water curtain system above the exhaust system, both the water curtain system and the modified water storage system being located inside the main spraying unit, a turbulence-inducing mechanism inside the exhaust system, a paint mist-catching mechanism at the bottom of one side of the main spraying unit, the paint mist-catching mechanism being located at the bottom of the exhaust system, a flow-guiding mechanism inside the paint mist-catching mechanism, and a water mist separation mechanism inside the exhaust system, the water mist separation mechanism being located above the turbulence-inducing mechanism.

[0006] Preferably, the main spraying structure includes an upper spray booth, a lower spray booth, a spray booth chamber, an operating chamber, a pressure equalization hood, a partition, an air intake fan for the spraying area, an air intake fan for the operating area, an air intake duct for the spraying area, an air intake duct for the operating area, and a spraying worktable. The lower spray booth is fixedly connected to the bottom of the upper spray booth. The spray booth chamber and the operating chamber are both located between the upper and lower spray booths. The pressure equalization hood is fixedly installed on the top of the upper spray booth. The partition is integrally located in the middle of the pressure equalization hood. The air intake fan for the paint spraying area and the air intake fan for the operating area are both fixedly installed inside the pressure equalization hood. The air intake fan for the paint spraying area is located above the paint spraying chamber, and the air intake fan for the operating area is located above the operating chamber. The air intake pipe for the paint spraying area and the air intake pipe for the operating area are both fixedly installed on the top of the pressure equalization hood. The air intake pipe for the paint spraying area is located above the air intake fan for the paint spraying area, and the air intake pipe for the operating area is located above the air intake fan for the operating area. The paint spraying operating table is fixedly connected to the inner wall of the paint spraying chamber, and a glass plate is fixedly connected to one side of the upper part of the paint spraying chamber.

[0007] Preferably, the exhaust system includes a cleaning tower, a heat dissipation plate, an exhaust fan, and a wire mesh filter. The cleaning tower is fixedly inserted into the top of the spray painting workbench and is located on one side of the spray painting chamber. The heat dissipation plate is fixedly connected to the inner wall of the cleaning tower on the side away from the spray painting chamber. The exhaust fan is fixedly installed on the top of the cleaning tower. The wire mesh filter is fixedly installed on the inner wall of the cleaning tower, and a bending platform is provided on the top of the cleaning tower.

[0008] Preferably, the modified water storage mechanism includes a tank connecting frame, a modified water storage tank, an overflow valve, an inlet pipe, a water level transparent window, a solenoid valve, a first drain pipe, a first liquid pump, a second drain pipe, a distribution pipe, and an atomizing nozzle. The tank connecting frame is fixedly connected to the inner wall of the upper chamber of the spray booth, and one side of the tank connecting frame is fixedly connected to one side of the washing tower. The modified water storage tank is fixedly installed inside the tank connecting frame. The overflow valve and the inlet pipe are both fixedly installed on the top of the modified water storage tank, and the water level transparent window is fixedly installed on the modified water storage tank. The surface of the glass plate has a transparent water level window located on one side. The solenoid valve is fixedly installed at the bottom of the modified water storage tank. The first drain pipe is fixedly installed at the output end of the solenoid valve. The first liquid pump is fixedly installed on the upper surface of the spray painting workbench, and the input end of the first liquid pump is fixedly connected to the output end of the first drain pipe. The second drain pipe is fixedly installed at the output end of the first liquid pump. The distribution pipe is fixedly connected to the inner wall of the washing tower, and the input end of the distribution pipe is fixedly connected to the output end of the second drain pipe. The atomizing nozzle is fixedly installed on the surface of the distribution pipe.

[0009] Preferably, the water curtain mechanism includes a water curtain trough, an overflow outlet, a lower connecting pipe, a second liquid pump, a first return pipe, a second return pipe, and a guide plate. The water curtain trough is fixedly connected to the surface of the bending table and is located on one side of the spray booth. The overflow outlet is opened through one side of the water curtain trough. The lower connecting pipe is fixedly installed at the bottom of the water curtain trough. The second liquid pump is fixedly installed on the upper surface of the spray booth. The first return pipe is fixedly installed at the input end of the second liquid pump. The second return pipe is fixedly installed at the output end of the second liquid pump. The guide plate is fixedly connected to the bottom of the water curtain trough, and both sides of the guide plate are fixedly connected to the inner wall of the spray booth.

[0010] Preferably, the turbulence-disrupting mechanism includes a reinforcing frame, a turbulence-disrupting plate, and a venting plate. There are two reinforcing frames, and both reinforcing frames are fixedly connected to the inner wall of the washing tower. There are three turbulence-disrupting plates, and all three turbulence-disrupting plates are fixedly connected between the two reinforcing frames and are inclined. The venting plate is fixedly installed on the inner wall of the turbulence-disrupting plate, and a venting hole is provided through the surface of the venting plate.

[0011] Preferably, the paint mist capturing mechanism includes a washing water tank, a tank cover, an air guide hopper, a paint spraying support plate, and an exhaust port. The washing water tank is fixedly connected to the inner bottom wall of the lower chamber of the paint spraying booth. The tank cover is fixedly connected to the top of the washing water tank, and the upper surface of the tank cover is fixedly connected to the bottom of the cleaning tower. The air guide hopper is integrally disposed on one side of the upper surface of the tank cover, and the outer wall of the air guide hopper is fixedly connected to the inner wall of the paint spraying operating table. An air guide port is provided at the bottom of the air guide hopper. The paint spraying support plate is fixedly connected to the inner wall of the air guide hopper, and a through hole is provided on the surface of the paint spraying support plate. The exhaust port is provided on the upper surface of the tank cover and is located below the cleaning tower.

[0012] Preferably, the paint mist capturing mechanism further includes a level gauge, a waste liquid pipe, and a flip cover. The level gauge and the waste liquid pipe are respectively fixedly installed on both sides of the air washing tank, and a valve is installed on the surface of the waste liquid pipe. The flip cover is rotatably connected to the upper surface of the tank cover plate.

[0013] Preferably, the flow guiding mechanism includes a seepage plate, a gas guide plate, a gas sealing plate, and seepage holes. The seepage plate is fixedly connected to the inner wall of the exhaust port, and an exhaust gap is provided between the seepage plate and the exhaust port. The gas guide plate and the gas sealing plate are located on both sides of the seepage plate, and a washing gas channel is provided between the gas guide plate and the tank cover plate. The seepage holes are opened through the surface of the seepage plate.

[0014] Preferably, the water mist separation mechanism includes a heat exchange tube, a condenser plate, a reflux plate, and an exhaust plate. The heat exchange tube is fixedly connected to the bottom of the lower connecting pipe. The condenser plate is slidably connected to the surface of the heat exchange tube. The reflux plate is fixedly connected to the surface of the condenser plate. The exhaust plate is opened through the inner wall of the reflux plate, and a reflux hole is opened on the surface of the exhaust plate. The reflux plate is inclined and its surface is fixedly connected to the inner wall of the washing tower. The reflux plate is located above the baffle plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This zero-chemical wastewater treatment system for painting, through its integrated spraying mechanism, exhaust mechanism, modified water storage mechanism, water curtain mechanism, turbulence mechanism, paint mist capture mechanism, flow guiding mechanism, and water mist separation mechanism, can capture a large amount of scattered paint mist that is not attached to the workpiece during painting operations. It requires no special chemicals, improves safety, reduces subsequent environmental pressure, makes paint residue easy to collect and separate, and eliminates the need for frequent water replacement, thus reducing operating costs.

[0017] This zero-chemical wastewater treatment system for painting utilizes a combination of a painting main unit, an exhaust system, a modified water storage system, a water curtain system, a turbulence system, a paint mist capture system, a flow guiding system, and a water mist separation system. Thanks to the alkaline state of the water, no microorganisms will grow during prolonged use, preventing the water from becoming smelly. The system also features easy separation of paint sludge, maintaining a relatively clean water condition for extended periods, allowing for reuse without water replacement. Most importantly, the combination of paint sludge and active hydrogen ions creates a non-stick coating, preventing stubborn adhesion to the equipment and making cleaning relatively easy and simple.

[0018] This zero-chemical wastewater treatment system for painting uses a washing tower, heat dissipation plate, exhaust fan, and wire mesh filter to generate negative pressure that draws paint mist and air mixtures along the washing tower for gradual cleaning, while also providing an operating passage and heat dissipation through the washing tower.

[0019] This zero-chemical wastewater treatment system for coating processes uses a storage tank connection frame, a modified water storage tank, an overflow valve, an inlet pipe, a water level transparent window, a solenoid valve, a first drain pipe, a first pump, a second drain pipe, a distribution pipe, and an atomizing nozzle to store modified water and generate high pressure to atomize the modified water.

[0020] This zero-chemical wastewater treatment system for painting uses a water curtain trough, overflow outlet, downstream pipe, second liquid pump, first return pipe, second return pipe, and guide plate to generate a water curtain to carry away paint mist, while simultaneously dissipating heat from the water and the washing tower.

[0021] This zero-chemical wastewater treatment system for painting uses reinforced frames, baffles, and ventilation plates to prevent particles from rising due to impact and ensure that the particles fall back down.

[0022] This zero-chemical wastewater treatment system for painting uses a washing water tank, tank cover, air guide hopper, paint support plate, exhaust port, level gauge, waste liquid pipeline and flip cover to store modified water and keep particle clusters inside the water body to avoid particle splashing.

[0023] The paint wastewater zero-chemical treatment system uses a seepage plate, air guide plate, air sealing plate, and seepage hole to form a Venturi tube structure in conjunction with the washing water tank and tank cover plate. This facilitates the acceleration of paint mist, increases its collision degree with water mist, and improves the mixing effect.

[0024] The zero-chemical wastewater treatment system for painting uses heat exchange tubes, condenser fins, reflux plates, and exhaust plates to condense the water mist inside the washing tower using cold water from the water curtain trough, facilitating the condensation and return of the water mist. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a side sectional view of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure at the location of the exhaust mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure at the location of the water curtain mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the connection structure between the water curtain mechanism and the water mist separation mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal exploded structure of the water mist separation mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the water curtain mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the modified water storage mechanism of the present invention;

[0033] Figure 9 This is a schematic diagram of the paint mist capturing mechanism of the present invention;

[0034] Figure 10 This is a side sectional view of the paint mist capturing mechanism of the present invention;

[0035] Figure 11 This is a schematic diagram of the turbulence-disrupting mechanism of the present invention.

[0036] In the diagram: 101. Upper body of the spray booth; 102. Lower body of the spray booth; 103. Spray booth room; 104. Operating room; 105. Equalizing hood; 106. Partition; 107. Air intake fan for the spray area; 108. Air intake fan for the operating area; 109. Air intake duct for the spray area; 110. Air intake duct for the operating area; 111. Spray booth operating table; 201. Washing tower; 202. Heat sink; 203. Exhaust fan; 204. Wire mesh filter; 301. Tank connection frame; 302. Modified water storage tank; 303. Overflow valve; 304. Liquid inlet pipe; 305. Water level transparent window; 306. Solenoid valve; 307. First drain pipe; 308. First liquid pump; 309. Second drain pipe; 310. Distribution pipe; 311. Atomizing nozzle; 401. Water curtain trough; 402. Overflow port; 403. Downstream pipe; 404. Second liquid pump; 405. First return pipe; 406. Second return pipe; 407. Guide plate; 501. Reinforcing frame; 502. Baffle plate; 503. Ventilation plate; 601. Air washing water tank; 602. Tank cover plate; 603. Air guide hopper; 604. Paint spray support plate; 605. Exhaust port; 606. Liquid level gauge; 607. Waste liquid pipe; 608. Flip cover; 701. Sludge seepage plate; 702. Air guide plate; 703. Air sealing plate; 704. Sludge seepage hole; 801. Heat exchange tube; 802. Condenser plate; 803. Return plate; 804. Exhaust plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-11 A zero-chemical treatment system for painting wastewater includes: a main spraying unit; an exhaust system on one side of the main spraying unit; a modified water storage system on one side of the exhaust system; a water curtain system above the exhaust system; both the water curtain system and the modified water storage system are located inside the main spraying unit; a turbulence-inducing mechanism inside the exhaust system; a paint mist capture system at the bottom of one side of the main spraying unit; a flow guide system inside the paint mist capture system; and a water mist separation system inside the exhaust system, located above the turbulence-inducing mechanism.

[0039] The main spraying structure includes an upper spray booth 101, a lower spray booth 102, a spray booth chamber 103, an operating chamber 104, a pressure equalizing hood 105, a partition 106, a spray area air intake fan 107, an operating area air intake fan 108, a spray area air intake duct 109, an operating area air intake duct 110, and a spraying workbench 111. The lower spray booth 102 is fixedly connected to the bottom of the upper spray booth 101. The spray booth chamber 103 and the operating chamber 104 are both located between the upper spray booth 101 and the lower spray booth 102. The pressure equalizing hood 105 is fixedly installed on the top of the upper spray booth 101. The partition 106 is integrally installed in the middle of the pressure equalizing hood 105. The spray area air intake fan 107 and the operating area air intake fan 108 are both fixedly installed... The spray booth 103 is located above the spray booth 104, with the spray area intake fan 107 positioned above the spray booth 103 and the operation area intake fan 108 positioned above the operation room 104. The spray area intake duct 109 and the operation area intake duct 110 are both fixedly installed on the top of the spray booth 105, with the spray area intake duct 109 positioned above the spray area intake fan 107 and the operation area intake duct 110 positioned above the operation area intake fan 108. The spray booth 111 is fixedly connected to the inner wall of the spray booth 103, and a glass plate is fixedly connected to one side of the upper body 101 of the spray booth. Through the configured spray body mechanism, exhaust mechanism, modified water storage mechanism, water curtain mechanism, turbulence mechanism, paint mist capture mechanism, flow guiding mechanism, and water mist separation mechanism, it is possible to... During spray painting operations, a large amount of scattered paint mist not adhering to the workpiece is captured without the need for special chemicals, improving safety and reducing subsequent environmental pressure. Paint residue is easy to collect and separate, and the water body does not need frequent replacement, reducing operating costs. The modified water machine uses purified tap water as raw material during water electrolysis, producing only electrolyzed alkaline water with a pH between nine and thirteen, known as modified water. The effective components of modified water are hydroxide ions and active hydrogen ions, with no other substances discharged. Under this special pH condition, active hydrogen ions react with the resin structure of the paint to form a special water-repellent structure. The principle of this water-repellent structure is that water molecules are highly polar molecules, and due to the action of active hydrogen ions, water exists in a liquid state in the form of water molecule clusters. Furthermore, these water molecule clusters constantly aggregate and recombine. Under the influence of the electric field formed by localized ions, polar water molecules will cluster around a certain ion. When the electric field reaches a certain intensity and there is a certain concentration of ions as a support, large water molecule clusters will be transformed into smaller water molecule clusters, thus exhibiting better permeability. This allows the "paint residue" of this structure to be easily separated from the water, achieving simple and efficient removal of paint residue. Thanks to the alkaline state of the water, no microorganisms will grow during long-term use, preventing the water from becoming smelly. The simple separation of paint residue allows the water to maintain a relatively clean state for a long time, enabling reuse without water replacement. Most importantly, after the paint residue combines with active hydrogen ions…This process creates a non-stick coating, preventing paint residue from stubbornly adhering to the equipment and making cleaning relatively easy and simple.

[0040] The exhaust system includes a cleaning tower 201, a heat dissipation plate 202, an exhaust fan 203, and a wire mesh filter 204. The cleaning tower 201 is fixedly inserted into the top of the spray painting workbench 111 and is located on one side of the spray painting chamber 103. The heat dissipation plate 202 is fixedly connected to the inner wall of the cleaning tower 201 on the side away from the spray painting chamber 103. The exhaust fan 203 is fixedly installed on the top of the cleaning tower 201. The wire mesh filter 204 is fixedly installed on the inner wall of the cleaning tower 201. The top of the cleaning tower 201 is provided with a bending platform. The cleaning tower 201, heat dissipation plate 202, exhaust fan 203, and wire mesh filter 204 are configured to generate negative pressure to attract paint mist and air mixtures to gradually clean along the cleaning tower 201, facilitating the provision of an operating channel and heat dissipation through the cleaning tower 201.

[0041] The modified water storage mechanism includes a tank connecting frame 301, a modified water storage tank 302, an overflow valve 303, an inlet pipe 304, a water level transparent window 305, a solenoid valve 306, a first drain pipe 307, a first liquid pump 308, a second drain pipe 309, a distribution pipe 310, and an atomizing nozzle 311. The tank connecting frame 301 is fixedly connected to the inner wall of the upper body 101 of the spray booth, and one side of the tank connecting frame 301 is fixedly connected to one side of the washing tower 201. The modified water storage tank 302 is fixedly installed inside the tank connecting frame 301. The overflow valve 303 and the inlet pipe 304 are both fixedly installed on the top of the modified water storage tank 302. The water level transparent window 305 is fixedly installed on the surface of the modified water storage tank 302, and the water level transparent window 305 is located on one side of the glass plate. The solenoid valve 306 is fixedly installed at the bottom of the modified water storage tank 302. The first drain pipe 307 is fixedly installed on the bottom of the modified water storage tank 302. 7 is fixedly installed at the output end of the solenoid valve 306. The first liquid pump 308 is fixedly installed on the upper surface of the spray painting operation table 111, and the input end of the first liquid pump 308 is fixedly connected to the output end of the first drain pipe 307. The second drain pipe 309 is fixedly installed at the output end of the first liquid pump 308. The distribution pipe 310 is fixedly connected to the inner wall of the washing tower 201, and the input end of the distribution pipe 310 is fixedly connected to the output end of the second drain pipe 309. The atomizing nozzle 311 is fixedly installed on the surface of the distribution pipe 310. The modified water storage tank 302, overflow valve 303, liquid inlet pipe 304, water level transparent window 305, solenoid valve 306, first drain pipe 307, first liquid pump 308, second drain pipe 309, distribution pipe 310 and atomizing nozzle 311 are provided to facilitate the storage of modified water and generate high pressure to atomize the modified water.

[0042] The water curtain mechanism includes a water curtain trough 401, an overflow port 402, a lower connecting pipe 403, a second liquid pump 404, a first return pipe 405, a second return pipe 406, and a guide plate 407. The water curtain trough 401 is fixedly connected to the surface of the bending table and is located on one side of the spray booth 103. The overflow port 402 is opened through one side of the water curtain trough 401. The lower connecting pipe 403 is fixedly installed at the bottom of the water curtain trough 401. The second liquid pump 404 is fixedly installed on the upper surface of the spray booth 111. The first return pipe 405 is fixedly installed on the upper surface of the spray booth 111. The first return pipe 405 is fixedly installed at the input end of the second liquid pump 404, the second return pipe 406 is fixedly installed at the output end of the second liquid pump 404, and the guide plate 407 is fixedly connected to the bottom of the water curtain trough 401. The two sides of the guide plate 407 are also fixedly connected to the inner wall of the paint spraying chamber 103. Through the water curtain trough 401, overflow port 402, lower pipe 403, second liquid pump 404, first return pipe 405, second return pipe 406 and guide plate 407, water curtain is generated to carry away paint mist, and at the same time heats the water and the washing tower 201.

[0043] The turbulence-disrupting mechanism includes a reinforcing frame 501, a turbulence-disrupting plate 502, and a venting plate 503. There are two reinforcing frames 501, and both reinforcing frames 501 are fixedly connected to the inner wall of the washing tower 201. There are three turbulence-disrupting plates 502, and all three turbulence-disrupting plates 502 are fixedly connected between the two reinforcing frames 501. All three turbulence-disrupting plates 502 are inclined. The venting plate 503 is fixedly installed on the inner wall of the turbulence-disrupting plate 502, and a ventilation hole is opened through the surface of the venting plate 503. The reinforcing frame 501, the turbulence-disrupting plate 502, and the venting plate 503 are used to block the particles that rise due to impact and ensure that the particles fall back.

[0044] The paint mist capture mechanism includes a washing water tank 601, a tank cover plate 602, an air guide hopper 603, a paint spraying support plate 604, and an exhaust port 605. The washing water tank 601 is fixedly connected to the inner bottom wall of the lower chamber 102 of the paint spraying booth. The tank cover plate 602 is fixedly connected to the top of the washing water tank 601, and the upper surface of the tank cover plate 602 is fixedly connected to the bottom of the cleaning tower 201. The air guide hopper 603 is integrally set on one side of the upper surface of the tank cover plate 602, and the outer wall of the air guide hopper 603 is fixedly connected to the inner wall of the paint spraying operating table 111. An air guide port is provided at the bottom of the air guide hopper 603. The paint spraying support plate 604 is fixedly connected to the inner wall of the air guide hopper 603, and a through hole is opened through the surface of the paint spraying support plate 604. The exhaust port 605 is opened through the upper surface of the tank cover plate 602, and the exhaust port 605 is located below the cleaning tower 201.

[0045] The paint mist capture mechanism also includes a level gauge 606, a waste liquid pipe 607, and a flip cover 608. The level gauge 606 and the waste liquid pipe 607 are fixedly installed on both sides of the air washing tank 601, and a valve is installed on the surface of the waste liquid pipe 607. The flip cover 608 is rotatably connected to the upper surface of the tank cover plate 602. The air washing tank 601, tank cover plate 602, air guide hopper 603, paint spraying support plate 604, exhaust port 605, level gauge 606, waste liquid pipe 607, and flip cover 608 are arranged to facilitate the storage of modified water, so as to keep the particle clusters inside the water body and avoid particle cluster splashing.

[0046] The flow guiding mechanism includes a slag-permeable plate 701, an air guide plate 702, an air sealing plate 703, and a slag-permeable hole 704. The slag-permeable plate 701 is fixedly connected to the inner wall of the exhaust port 605, and an exhaust gap is provided between the slag-permeable plate 701 and the exhaust port 605. The air guide plate 702 and the air sealing plate 703 are located on both sides of the slag-permeable plate 701, and a washing air channel is provided between the air guide plate 702 and the tank cover plate 602. The slag-permeable hole 704 is opened through the surface of the slag-permeable plate 701. The slag-permeable plate 701, the air guide plate 702, the air sealing plate 703, and the slag-permeable hole 704 are designed to cooperate with the washing air tank 601 and the tank cover plate 602 to form a Venturi tube structure, which facilitates the acceleration of paint mist, increases its collision degree with water mist, and improves the mixing effect.

[0047] The water mist separation mechanism includes a heat exchange tube 801, a condenser plate 802, a reflux plate 803, and an exhaust plate 804. The heat exchange tube 801 is fixedly connected to the bottom of the lower connecting pipe 403. The condenser plate 802 is slidably connected to the surface of the heat exchange tube 801. The reflux plate 803 is fixedly connected to the surface of the condenser plate 802. The exhaust plate 804 is opened through the inner wall of the reflux plate 803, and a reflux hole is opened on the surface of the exhaust plate 804. The reflux plate 803 is inclined and its surface is fixedly connected to the inner wall of the washing tower 201. The reflux plate 803 is located above the baffle plate 502. Through the heat exchange tube 801, condenser plate 802, reflux plate 803, and exhaust plate 804, the cold water inside the water curtain tank 401 can be used to condense the water mist inside the washing tower 201, facilitating the reflux of the condensed water mist.

[0048] Working principle: During installation, an external filter and an auxiliary filter pump are installed between the inlet pipe 304 and the waste pipe 607. The tank cover 602 is opened, the solenoid valve 306 is closed, and modified water is injected into the air washing water tank 601. Then, the auxiliary filter pump of the external filter is started to filter the modified water and pump it into the modified water storage tank 302, so that the water level inside the modified water storage tank 302 and the water level inside the air washing water tank 601 reach a certain height. Then, the solenoid valve 306 is opened, and the first liquid pump 308 is started, so that the pumping flow rate of the first liquid pump 308 and the auxiliary filter pump of the external filter is the same. The modified water inside the modified water storage tank 302 is continuously pressurized and atomized from the atomizing nozzle 311 and finally falls into the air washing water tank 601. The modified water inside the spray booth 103 is continuously pumped out of the waste liquid pipe 607, filtered, and then returned to the modified water storage tank 302 through the inlet pipe 304, thus forming a cycle. Simultaneously, the paint spraying area intake fan 107, exhaust fan 203, and second liquid pump 404 are activated. The second liquid pump 404 continuously pumps the modified water inside the air washing tank 601 into the water curtain tank 401. The modified water then overflows from the overflow port 402 and flows downwards along the guide plate 407, forming a water curtain on the surface of the guide plate 407. The downward-flowing water flows through the paint spraying support plate 604 into the air guide hopper 603 and finally back into the air washing tank 601. During painting, the paint spraying area intake fan 107 pumps treated air into the paint spraying chamber 103 to replenish the air supply. The exhaust fan 203 creates negative pressure within the paint spraying chamber 103. The paint mist generated is pumped outwards. First, the paint mist passes through the paint spraying support plate 604 and enters the air guide hopper 603. Then, it enters the air washing tank 601 and flows along the air washing channel between the modified water surface and the tank cover plate 602, exiting through the exhaust gap on one side of the slag-permeable plate 701 into the cleaning tower 201. At this time, a Venturi tube structure is formed between the air guide hopper 603, the tank cover plate 602, the slag-permeable plate 701, and the modified water surface. The paint mist is pressurized and accelerated, spraying upwards from the exhaust gap and colliding with the atomized modified water sprayed from the atomizing nozzle 311. Simultaneously, as the paint mist passes through the air washing channel, it also fully collides with the modified water surface, ensuring thorough mixing. When oil or other fats encounter the modified water, they are decomposed. Through saponification, oily contaminants become easier to remove. The modified water then... Emulsification breaks down and disperses oily contaminants, making them easier to remove. Under the action of active hydrogen ions in modified water, most contaminant ions have a strong negative potential. Simultaneously, many surfaces of objects to be cleaned also carry a negative charge, creating a repulsive force that has a strong cleaning effect. Furthermore, this repulsive force prevents the surfaces of objects from being recontaminated. The alkaline electrolyzed water also contains abundant dissolved hydrogen, which plays a role in contaminant removal. Unabsorbable air and a small portion of particulate matter rise along the scrubbing tower 201. The rising mixture is first blocked and recirculated by the baffle plate 502. The remaining particulate matter is impacted and falls. After the air recirculates, it continues to rise through the vent plate 503. The rising air is gradually cooled by the heat dissipation plate 202.This process causes some water vapor to condense and flow back, while the remaining air continues to rise. The rising air is then blocked by the reflux plate 803 and flows back again. It is further cooled by the cold water inside the heat exchange tube 801 and condenser fins 802, causing the water vapor to condense and flow back again. The air then continues to rise, is filtered by the wire mesh filter 204, and water mist is effectively intercepted. Finally, the water droplets fall back and flow back with the modified water. The air that has passed through the wire mesh filter 204 is finally discharged.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A zero-chemical treatment system for coating wastewater, characterized in that, include: The main body of the spray painting unit has an exhaust system on one side, a modified water storage system on one side of the exhaust system, a water curtain system above the exhaust system, and both the water curtain system and the modified water storage system are located inside the main body of the spray painting unit. A turbulence mechanism is installed inside the exhaust system. A paint mist capturing system is located at the bottom of one side of the main body of the spray painting unit, and the paint mist capturing system is located at the bottom of the exhaust system. A flow guiding mechanism is installed inside the paint mist capturing system. A water mist separation mechanism is installed inside the exhaust system, and the water mist separation mechanism is located above the turbulence mechanism. The main spraying structure includes an upper spray booth (101), a lower spray booth (102), and a spray booth chamber (103). A cleaning tower (201) is located on one side of the spray booth chamber (103), and a bending platform is provided on the top of the cleaning tower (201). A scrubbing water tank (601) is fixedly connected to the inner bottom wall of the lower spray booth (102), and a tank cover plate (602) is fixedly connected to the top of the scrubbing water tank (601). An exhaust port (605) is opened through the upper surface of the tank cover plate (602), and the exhaust port (605) is located below the cleaning tower (201). The water curtain mechanism includes a water curtain trough (401) fixedly connected to the surface of the bending table, and a lower connecting pipe (403) fixedly installed at the bottom of the water curtain trough (401). The turbulence-disrupting mechanism includes two reinforcing frames (501) fixedly connected to the inner wall of the washing tower (201), and three turbulence-disrupting plates (502) fixedly connected between the two reinforcing frames (501). The flow guiding mechanism includes a slag-permeable plate (701), a gas guide plate (702), a gas sealing plate (703), and a slag-permeable hole (704). The slag-permeable plate (701) is fixedly connected to the inner wall of the exhaust port (605), and an exhaust gap is provided between the slag-permeable plate (701) and the exhaust port (605). The gas guide plate (702) and the gas sealing plate (703) are located on both sides of the slag-permeable plate (701), and a gas washing channel is provided between the gas guide plate (702) and the tank cover plate (602). The slag-permeable hole (704) is opened through the surface of the slag-permeable plate (701). The water mist separation mechanism includes a heat exchange tube (801), a condenser plate (802), a reflux plate (803), and an exhaust plate (804). The heat exchange tube (801) is fixedly connected to the bottom of the lower connecting pipe (403). The condenser plate (802) is slidably connected to the surface of the heat exchange tube (801). The reflux plate (803) is fixedly connected to the surface of the condenser plate (802). The exhaust plate (804) is opened through the inner wall of the reflux plate (803). The surface of the exhaust plate (804) is provided with a reflux hole. The reflux plate (803) is inclined. The surface of the reflux plate (803) is fixedly connected to the inner wall of the washing tower (201). The reflux plate (803) is located above the baffle plate (502).

2. The zero-chemical treatment system for coating wastewater according to claim 1, characterized in that, The main spraying mechanism also includes an operating room (104), a pressure equalization hood (105), a partition (106), a spraying area air intake fan (107), an operating area air intake fan (108), a spraying area air intake pipe (109), an operating area air intake pipe (110), and a spraying operating table (111). The lower spraying booth (102) is fixedly connected to the bottom of the upper spraying booth (101). The spraying room (103) and the operating room (104) are both located between the upper spraying booth (101) and the lower spraying booth (102). The pressure equalization hood (105) is fixedly installed on the top of the upper spraying booth (101). The partition (106) is integrally located in the middle of the pressure equalization hood (105). The spraying area air intake fan... (107) and the operating area air intake fan (108) are both fixedly installed inside the pressure equalization hood (105), and the paint spraying area air intake fan (107) is located above the paint spraying chamber (103), and the operating area air intake fan (108) is located above the operating chamber (104). The paint spraying area air intake pipe (109) and the operating area air intake pipe (110) are both fixedly installed on the top of the pressure equalization hood (105), and the paint spraying area air intake pipe (109) is located above the paint spraying area air intake fan (107), and the operating area air intake pipe (110) is located above the operating area air intake fan (108). The paint spraying operating table (111) is fixedly connected to the inner wall of the paint spraying chamber (103), and a glass plate is fixedly connected to one side of the upper body (101) of the paint spraying chamber.

3. The zero-chemical treatment system for coating wastewater according to claim 2, characterized in that, The exhaust system includes a cleaning tower (201), a heat sink (202), an exhaust fan (203), and a wire mesh filter (204). The cleaning tower (201) is fixedly inserted into the top of the spray painting workbench (111). The heat sink (202) is fixedly connected to the inner wall of the cleaning tower (201) on the side away from the spray painting chamber (103). The exhaust fan (203) is fixedly installed on the top of the cleaning tower (201). The wire mesh filter (204) is fixedly installed on the inner wall of the cleaning tower (201).

4. The zero-chemical treatment system for coating wastewater according to claim 3, characterized in that, The modified water storage mechanism includes a tank connecting frame (301), a modified water storage tank (302), an overflow valve (303), an inlet pipe (304), a water level transparent window (305), a solenoid valve (306), a first drain pipe (307), a first liquid pump (308), a second drain pipe (309), a distribution pipe (310), and an atomizing nozzle (311). The tank connecting frame (301) is fixedly connected to the inner wall of the upper body (101) of the spray booth, and one side of the tank connecting frame (301) is fixedly connected to one side of the washing tower (201). The modified water storage tank (302) is fixedly installed inside the tank connecting frame (301). The overflow valve (303) and the inlet pipe (304) are both fixedly installed on the top of the modified water storage tank (302). The water level transparent window (305) is fixedly installed on the modified water storage tank. The surface of the water storage tank (302) and the water level transparent window (305) are located on one side of the glass plate. The solenoid valve (306) is fixedly installed at the bottom of the modified water storage tank (302). The first drain pipe (307) is fixedly installed at the output end of the solenoid valve (306). The first liquid pump (308) is fixedly installed on the upper surface of the spray painting workbench (111). The input end of the first liquid pump (308) is fixedly connected to the output end of the first drain pipe (307). The second drain pipe (309) is fixedly installed at the output end of the first liquid pump (308). The distribution pipe (310) is fixedly connected to the inner wall of the washing tower (201). The input end of the distribution pipe (310) is fixedly connected to the output end of the second drain pipe (309). The atomizing nozzle (311) is fixedly installed on the surface of the distribution pipe (310).

5. The zero-chemical treatment system for coating wastewater according to claim 3, characterized in that, The water curtain mechanism also includes an overflow port (402), a second liquid pump (404), a first return pipe (405), a second return pipe (406), and a guide plate (407). The water curtain trough (401) is located on one side of the spray booth (103). The overflow port (402) is opened through one side of the water curtain trough (401). The second liquid pump (404) is fixedly installed on the upper surface of the spray booth (111). The first return pipe (405) is fixedly installed at the input end of the second liquid pump (404). The second return pipe (406) is fixedly installed at the output end of the second liquid pump (404). The guide plate (407) is fixedly connected to the bottom of the water curtain trough (401), and both sides of the guide plate (407) are fixedly connected to the inner wall of the spray booth (103).

6. The zero-chemical treatment system for coating wastewater according to claim 5, characterized in that, The turbulence mechanism includes a vent plate (503), and three turbulence plates (502) are all inclined. The vent plate (503) is fixedly installed on the inner wall of the turbulence plate (502), and a vent hole is opened through the surface of the vent plate (503).

7. The zero-chemical treatment system for coating wastewater according to claim 3, characterized in that, The paint mist capture mechanism includes a washing water tank (601), a tank cover plate (602), an air guide hopper (603), a paint spraying support plate (604), and an exhaust port (605). The upper surface of the tank cover plate (602) is fixedly connected to the bottom of the washing tower (201). The air guide hopper (603) is integrally set on one side of the upper surface of the tank cover plate (602), and the outer wall of the air guide hopper (603) is fixedly connected to the inner wall of the paint spraying operating table (111). An air guide port is provided at the bottom of the air guide hopper (603). The paint spraying support plate (604) is fixedly connected to the inner wall of the air guide hopper (603), and a through hole is provided on the surface of the paint spraying support plate (604).

8. The zero-chemical treatment system for coating wastewater according to claim 7, characterized in that, The paint mist capture mechanism also includes a level gauge (606), a waste liquid pipe (607), and a flip cover (608). The level gauge (606) and the waste liquid pipe (607) are respectively fixedly installed on both sides of the air washing tank (601), and a valve is installed on the surface of the waste liquid pipe (607). The flip cover (608) is rotatably connected to the upper surface of the tank cover plate (602).

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