Environment-friendly paint spraying room with high-efficiency paint mist treatment and exhaust gas purification functions

Abstract

This utility model relates to the field of environmental protection equipment technology, specifically an environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions. It includes a booth body, with an air supply system and an exhaust system installed on the outside of the body. The booth body treats exhaust gas through an environmental protection treatment unit, which includes a high-efficiency paint mist capture system located inside the booth body and an activated carbon adsorption exhaust gas purification system installed on the outside of the booth body. In this environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions, a high-efficiency paint mist capture system is installed inside the booth body. A circulating water tank, a water pump, and a water curtain plate work together to form a stable water curtain, directly intercepting and capturing paint mist through collision. Combined with the paint mist capture chamber and exhaust fan, the system utilizes water flow scouring and turbulent condensation to efficiently remove paint mist, including fine particles. Compared to traditional filtration methods, the paint mist capture efficiency is improved, reducing the harm of paint mist to the environment and operators, and lowering the cost and replacement frequency of filter consumables.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically to an environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions. Background Technology

[0002] In industrial production, spray booths are indispensable equipment for coating workpiece surfaces, and their performance is directly related to product quality, air quality, and the occupational health of operators. However, traditional spray booths have many undeniable drawbacks in actual operation.

[0003] On the one hand, paint mist treatment methods have limited effectiveness. Most traditional spray booths use filter cotton, dry filters, and other methods to intercept paint mist, which not only have low capture efficiency, allowing a large amount of paint mist to escape into the air, but also require frequent replacement of filter consumables, increasing operating costs and maintenance burden. For example, in industries such as furniture manufacturing and automotive parts painting, frequent painting operations make filter cotton replacement a daily and arduous task, and even so, it is still impossible to effectively eliminate paint mist pollution.

[0004] On the other hand, the exhaust gas purification effect is poor. The volatile organic compounds (VOCs) and benzene series compounds generated during the painting process cause serious pollution to the atmospheric environment and endanger human health. However, existing exhaust gas treatment equipment is either complex in structure and expensive, or has insufficient purification capacity, making it difficult to meet environmental protection requirements.

[0005] Furthermore, the temperature and humidity control precision in the spray painting environment is insufficient. A suitable and stable temperature and humidity environment is crucial for ensuring paint film quality; fluctuations in temperature and humidity can easily lead to defects such as orange peel and pinholes in the paint film, affecting product quality. However, traditional spray painting booths are lagging in environmental regulation and cannot achieve precise control.

[0006] Taking the invention with application number CN201610176946.2 as an example, although the spray booth disclosed in this patent uses a combination of air blowing pipes and water spray pipes to form a water curtain to absorb paint, which reduces air pollution to a certain extent, it still has obvious limitations. Its paint mist treatment relies solely on simple water curtain absorption, which is not ideal for capturing tiny paint mist particles; there is no special design for exhaust gas purification, so it cannot treat the volatilized harmful gases; and it lacks measures to control the temperature and humidity of the spraying environment, making it difficult to ensure high-quality spraying operations. Utility Model Content

[0007] The purpose of this invention is to provide an environmentally friendly spray booth with efficient paint mist treatment and exhaust gas purification functions, in order to solve the problems mentioned in the background art, such as paint mist treatment relying solely on simple water curtain absorption, which is not ideal for capturing tiny paint mist particles; exhaust gas purification not being specifically designed to treat volatilized harmful gases; and lack of measures to control the temperature and humidity of the spraying environment, making it difficult to guarantee high-quality spraying operations.

[0008] To achieve the above objectives, this utility model provides an environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions, including a booth body. An air supply system and an exhaust system are installed on the outside of the booth body. The booth body treats exhaust gas through an environmental protection treatment unit. The environmental protection treatment unit includes a high-efficiency paint mist capture system located inside the booth body. An activated carbon adsorption exhaust gas purification system is installed on the outside of the booth body. A filter tower is installed between the exhaust system pipeline and the activated carbon adsorption exhaust gas purification system.

[0009] This setup creates directional airflow within the paint booth by installing air supply and exhaust systems on the outside of the booth, ensuring continuous air renewal. The environmental treatment unit consists of a high-efficiency paint mist capture system inside the booth and an activated carbon adsorption and exhaust gas purification system outside the booth. The former first performs preliminary treatment of the paint mist, while the latter further purifies the exhaust gas. Together, they effectively treat pollutants generated during the painting process.

[0010] Preferably, the high-efficiency paint mist collection system includes an outer chamber, inside which a circulating water tank is installed, and inside the circulating water tank is a water pump. A water curtain plate is installed on the lower side of the outer chamber, and the circulating water tank pumps water into the water curtain plate to form a water curtain.

[0011] This high-efficiency paint mist capture system uses a circulating water tank to store water, and a water pump delivers water to a water curtain plate. Water pressure creates a continuous and uniform water curtain on the plate. When air containing paint mist passes through the water curtain under the action of the exhaust system, the paint mist particles collide with and are intercepted by the water curtain, thus being captured.

[0012] Preferably, a water tank is provided on the inner bottom surface of the room, the water tank collects water from the water curtain plate, and the water in the water tank is recycled to the circulating water tank through the input pipe of the water pump.

[0013] The water tank at the bottom of the room is used to collect water containing paint mist particles flowing down from the water curtain. The water pump draws the water from the tank back to the circulating water tank through the input pipe, forming a complete water circulation system to ensure a continuous water supply to the water curtain and maintain its stable operation.

[0014] Preferably, the outer compartment is equipped with a paint mist collection chamber, the top of which is equipped with an exhaust fan for paint mist collection, and one side of which is equipped with an exhaust port that connects to the water curtain to discharge the air after paint mist collection.

[0015] This system uses an exhaust fan at the top of the paint mist collection chamber to create negative pressure, drawing in air containing paint mist. As the air passes through the water curtain, most of the paint mist is captured. The remaining tiny paint mist particles are further washed and condensed by the high-speed water flow in the turbulent area of ​​the paint mist collection chamber, and finally flow back to the circulating water tank with the water flow. The purified air is then discharged through the exhaust port connected to the water curtain.

[0016] Preferably, the purification system includes an outer shell, the interior of which is divided into two compartments by a partition. The partition has vents for the passage of gas between the two compartments. One compartment is an active adsorption compartment, and the other is a photocatalytic oxidation compartment.

[0017] The outer shell of this activated carbon adsorption waste gas purification system is divided into an activated adsorption chamber and a photocatalytic oxidation chamber by a partition, and the two chambers are connected by air vents on the partition. The air, after being treated by the high-efficiency paint mist capture system, first enters the activated adsorption chamber for preliminary adsorption and purification, and then enters the photocatalytic oxidation chamber through the air vents for further purification, thus achieving staged treatment of waste gas.

[0018] Preferably, the activated adsorption chamber is equipped with an adsorption bed made of activated carbon material.

[0019] The adsorption bed in the activated adsorption chamber of this device is made of activated carbon material. Activated carbon has a high specific surface area and abundant pore structure, which can adsorb harmful gas molecules such as volatile organic compounds (VOCs) and benzene series compounds in the waste gas on its surface through physical adsorption and chemical adsorption, thereby achieving preliminary purification of the waste gas.

[0020] Preferably, the inner wall of the photocatalytic oxidation chamber is equipped with ultraviolet lamps and an oxygen generator, which are symmetrically installed.

[0021] This device features a photocatalytic oxidation chamber where ultraviolet lamps emit ultraviolet light to irradiate harmful gas molecules in the exhaust gas, causing their chemical bonds to break. Simultaneously, the oxygen generated by the oxygen generator, under the action of ultraviolet light, produces ozone and hydroxyl radicals, which are highly oxidizing and active substances. These active substances undergo oxidation-reduction reactions with the harmful gas molecules, decomposing them into harmless substances such as carbon dioxide and water.

[0022] Preferably, one side of the active adsorption chamber is provided with an air inlet for the air to be purified to enter, and one side of the photocatalytic oxidation chamber is provided with an air outlet for the clean air to be discharged.

[0023] The air inlet of the activated adsorption chamber is used to introduce the air to be purified after it has been treated by the high-efficiency paint mist capture system. After the air undergoes adsorption and photocatalytic oxidation treatment in the activated adsorption chamber and the photocatalytic oxidation chamber in sequence, the clean air is discharged from the air outlet of the photocatalytic oxidation chamber, forming a complete waste gas purification process.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This environmentally friendly paint booth, equipped with efficient paint mist treatment and exhaust gas purification functions, features a high-efficiency paint mist capture system. A circulating water tank, water pump, and water curtain work together to form a stable water curtain, directly intercepting and capturing the paint mist through collision. Combined with the paint mist capture chamber and exhaust fan, the system utilizes water flow and turbulent condensation to efficiently remove paint mist, including fine particles. Compared to traditional filtration methods, this significantly improves paint mist capture efficiency, reducing the harm of paint mist to the environment and operators, while also lowering the cost and replacement frequency of filter consumables.

[0026] In the activated carbon adsorption waste gas purification system, the adsorption bed in the activated adsorption chamber uses highly adsorbent activated carbon material. Combined with the ultraviolet lamps and oxygen generator in the photocatalytic oxidation chamber, it can adsorb and photocatalytically decompose harmful gases such as volatile organic compounds (VOCs) and benzene series compounds. The dual purification effect makes the waste gas treatment more thorough, ensuring that the emitted gas meets strict environmental protection standards and effectively reducing air pollution.

[0027] Although the claims do not mention an intelligent temperature and humidity control system, the air supply and exhaust systems equipped in the booth can work in conjunction with other environmental control equipment to maintain stable airflow and environmental parameters within the spray booth, providing good temperature and humidity conditions for spray painting operations, reducing paint film defects caused by environmental factors, and improving the coating quality and pass rate of products.

[0028] The high-efficiency paint mist capture system is placed inside the booth, while the activated carbon adsorption and exhaust gas purification system is located on the outside of the booth. The layout of each system is reasonable, which not only achieves functional integration, but also does not occupy too much internal space of the booth. The structure is compact, easy to install and maintain, and has excellent overall environmental performance, meeting the needs of industrial production for integrated and efficient environmentally friendly paint booths. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the high-efficiency paint mist collection system of this utility model;

[0031] Figure 3 This is a schematic diagram of the activated carbon adsorption waste gas purification system of this utility model;

[0032] The meanings of the labels in the diagram are as follows:

[0033] 1. Chamber; 2. Air supply system; 3. Exhaust system; 4. High-efficiency paint mist collection system; 41. Circulating water tank; 42. Water pump; 43. Water curtain plate; 44. Paint mist collection chamber; 441. Exhaust fan; 5. Activated carbon adsorption waste gas purification system; 51. Activated adsorption chamber; 511. Adsorption bed; 52. Photocatalytic oxidation chamber; 521. Ultraviolet lamp; 522. Oxygen generator; 6. Filter tower. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] This utility model provides an environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions, such as... Figure 1 As shown, the system includes a housing 1, with an air supply system 2 and an exhaust system 3 installed on the outside of the housing 1. The housing 1 is treated by an environmental protection treatment unit, which includes a high-efficiency paint mist capture system 4 located inside the housing 1. An activated carbon adsorption exhaust gas purification system 5 is installed on the outside of the housing 1. A filter tower 6 is installed between the exhaust system 3 and the activated carbon adsorption exhaust gas purification system 5. The gas is introduced into the filter tower 6 and discharged from the top for further dust filtration.

[0036] By installing an air supply system 2 and an exhaust system 3 on the outside of the booth 1, the air supply system 2 uses a centrifugal fan, and the exhaust system 3 uses an exhaust duct. One end of the exhaust duct connects to the booth 1, and the other end connects to an activated carbon adsorption exhaust gas purification system 5, forming a directional flow of air within the spray booth and ensuring continuous air renewal. The environmental protection treatment unit consists of a high-efficiency paint mist capture system 4 located inside the booth 1 and an activated carbon adsorption exhaust gas purification system 5 located outside the booth 1. The high-efficiency paint mist capture system 4 first performs preliminary treatment of the paint mist, and the activated carbon adsorption exhaust gas purification system 5 further purifies the exhaust gas. The two work together to effectively treat pollutants generated during the painting process. The basic structure and core treatment process of the environmentally friendly spray booth are clearly defined, realizing the orderly circulation of air in the spray booth and the graded treatment of pollutants. This lays the foundation for subsequent high-efficiency paint mist treatment and exhaust gas purification, enabling the spray booth to have basic environmental protection capabilities.

[0037] In this embodiment, as Figure 2As shown, the high-efficiency paint mist collection system 4 includes an outer chamber, inside which a circulating water tank 41 is installed, and inside the circulating water tank 41 a water pump 42 is installed. A water curtain plate 43 is installed on the lower side of the outer chamber. The circulating water tank 41 pumps water into the water curtain plate 43 through the water pump 42 to form a water curtain.

[0038] The high-efficiency paint mist capture system 4 includes an outer chamber, inside which a circulating water tank 41 stores water. A water pump 42 inside the circulating water tank 41 pumps water to a water curtain plate 43 installed on one side of the lower part of the outer chamber. Water pressure causes the water to form a continuous and uniform water curtain on the water curtain plate 43. When air containing paint mist passes through the water curtain under the action of the exhaust system 3, the paint mist particles collide with and are intercepted by the water curtain, thus being captured. Compared with traditional filter cotton, the water curtain interception method can capture paint mist particles, especially large particles, more efficiently. At the same time, the continuous flow of the water curtain reduces the accumulation of paint mist on the water curtain plate 43, reducing maintenance frequency. Furthermore, the circulating water tank 41 enables the recycling of water resources, saving operating costs.

[0039] Specifically, such as Figure 1 , Figure 2 As shown, a water pool is provided on the bottom of the interior of the room 1. The water pool collects water from the water curtain plate 43 and returns the water from the water pool to the circulating water tank 41 through the input pipe of the water pump 42.

[0040] A water tank located on the bottom of the interior of the chamber 1 collects water containing paint mist particles flowing down from the water curtain plate 43. A water pump 42 pumps the water from the tank back to the circulating water tank 41 via an input pipe, forming a complete water circulation system. This ensures a continuous water supply to the water curtain plate 43 and maintains its stable operation. This achieves water resource recycling, avoids water waste, and reduces operating costs. Simultaneously, it ensures the water curtain remains in good working order, continuously and efficiently capturing paint mist, thus improving the stability and sustainability of the paint mist collection system 4.

[0041] Furthermore, such as Figure 2 As shown, the outer compartment is equipped with a paint mist collection chamber 44. A fan 441 for paint mist collection is installed on the top of the paint mist collection chamber 44. An exhaust port connected to the water curtain plate 43 is provided on one side of the paint mist collection chamber 44 to discharge the air after paint mist collection.

[0042] An exhaust fan 441 installed at the top of the paint mist collection chamber 44 inside the outer compartment generates negative pressure, drawing air containing paint mist into the chamber. As the air passes through the water curtain plate 43, most of the paint mist is captured. The remaining tiny paint mist particles are further washed and condensed by the high-speed water flow in the turbulent area within the collection chamber 44, and finally flow back to the circulating water tank 41 with the water flow. The purified air is then discharged through the exhaust port connected to the water curtain plate 43. The exhaust fan 441, water curtain plate 43, and paint mist collection chamber 44 work together to perform secondary treatment of the paint mist, further improving the paint mist collection efficiency, especially for the treatment of tiny paint mist particles, minimizing paint mist emissions and protecting the environment and the health of operators.

[0043] Furthermore, such as Figure 3 As shown, the purification system 5 includes an outer shell, and the interior of the outer shell is divided into two compartments by a partition. The partition has vent holes for the gas to pass through the two compartments. One compartment is an active adsorption compartment 51, and the other compartment is a photocatalytic oxidation compartment 52.

[0044] The activated carbon adsorption waste gas purification system 5 has its outer shell divided into two chambers by a partition. The partition has vents for gas to pass through both chambers. One chamber is the activated adsorption chamber 51, and the other is the photocatalytic oxidation chamber 52. Air treated by the high-efficiency paint mist capture system 4 first enters the activated adsorption chamber 51 for preliminary adsorption and purification, and then passes through the vents into the photocatalytic oxidation chamber 52 for further purification, achieving staged treatment of the waste gas. Dividing the waste gas purification process into two stages—adsorption and photocatalytic oxidation—enables more comprehensive and efficient removal of harmful components from the waste gas, improving the purification effect, ensuring that the final emissions meet environmental standards, and reducing atmospheric pollution.

[0045] Furthermore, such as Figure 3 As shown, the activated adsorption chamber 51 is equipped with an adsorption bed 511 made of activated carbon material.

[0046] The activated adsorption chamber 51 contains an adsorption bed 511 made of activated carbon. Activated carbon has a high specific surface area and abundant pore structure, enabling it to adsorb harmful gas molecules such as volatile organic compounds (VOCs) and benzene compounds in the waste gas onto its surface through physical and chemical adsorption, thereby achieving preliminary purification of the waste gas. Utilizing the strong adsorption properties of activated carbon, harmful gases in the waste gas are effectively intercepted and adsorbed, reducing the concentration of pollutants in the waste gas, lessening the burden on subsequent photocatalytic oxidation treatment, and simultaneously improving the purification efficiency and treatment capacity of the entire waste gas purification system 5.

[0047] Furthermore, such as Figure 3As shown, the inner wall of the photocatalytic oxidation chamber 52 is equipped with an ultraviolet lamp 521 and an oxygen generator 522, which are symmetrically installed.

[0048] The inner wall of the photocatalytic oxidation chamber 52 is equipped with ultraviolet lamps 521 and an oxygen generator 522. The ultraviolet lamps 521 emit ultraviolet light, irradiating harmful gas molecules in the exhaust gas and breaking their chemical bonds. Simultaneously, the oxygen generated by the oxygen generator 522, under the action of ultraviolet light, produces highly oxidizing ozone and hydroxyl radicals, which react with the harmful gas molecules in a redox reaction, decomposing them into harmless substances such as carbon dioxide and water. Through this photocatalytic oxidation reaction, the exhaust gas, after being treated by activated carbon adsorption, undergoes deep purification, further decomposing harmful gases and ensuring thorough purification. This allows the emitted gases to meet higher environmental standards, effectively reducing environmental pollution.

[0049] Furthermore, such as Figure 3 As shown, an air inlet for the air to be purified is provided on one side of the active adsorption chamber 51, and an air outlet for the clean air is provided on one side of the photocatalytic oxidation chamber 52.

[0050] An air inlet on one side of the activated adsorption chamber 51 is used to introduce the air to be purified after being treated by the high-efficiency paint mist capture system 4. The air undergoes adsorption and photocatalytic oxidation treatment sequentially in the activated adsorption chamber 51 and the photocatalytic oxidation chamber 52, and then is discharged clean air from the air outlet on one side of the photocatalytic oxidation chamber 52, forming a complete waste gas purification process. This clearly defines the flow path of the waste gas in the activated carbon adsorption waste gas purification system 5, ensuring that the waste gas passes through each purification stage sequentially according to the predetermined treatment process, ensuring the orderly progress of the waste gas purification process, and thus achieving a highly efficient and stable waste gas purification effect.

[0051] This environmentally friendly paint booth, featuring efficient paint mist treatment and exhaust gas purification, utilizes a coordinated operation of its air supply system, exhaust system, and environmental treatment unit to form a complete treatment process of "air circulation—paint mist capture—multi-stage purification." The air supply system provides fresh air, the exhaust system drives airflow, and the environmental treatment unit's efficient paint mist capture system, filtration tower, and activated carbon adsorption exhaust gas purification system perform gradient removal of pollutants, ultimately achieving emission standards.

[0052] Air supply system 2: A centrifugal fan is used to filter outside air and send it into room 1 to maintain positive pressure inside the room and ensure a continuous supply of fresh air.

[0053] Exhaust system 3: The exhaust duct creates negative pressure, driving the air containing paint mist and exhaust gas to flow towards the bottom of the chamber 1. After preliminary treatment by the high-efficiency paint mist capture system 4, the air enters the filter tower 6 and the activated carbon adsorption exhaust gas purification system 5 through the duct.

[0054] Pump 42 in the circulating water tank 41 delivers water to the water curtain plate 43, forming a continuous water curtain. When air containing paint mist flows through, large paint mist particles >10μm are directly intercepted by the water curtain and fall into the water pool at the bottom of the chamber 1 with the water flow, achieving a capture efficiency of over 90%. Uncaptured tiny paint mist particles <10μm enter the paint mist capture chamber 44, where the exhaust fan 441 generates turbulence, causing the paint mist to collide and condense with the high-speed water flow, eventually flowing back to the circulating water tank 41, increasing the total paint mist removal rate to 98%. Wastewater collected in the water pool at the bottom of the chamber is pumped back to the circulating water tank 41 by pump 42. By adding flocculants, the paint mist particles are precipitated, and the upper clear water is reused, achieving a water resource utilization rate of over 95%.

[0055] The filtration tower 6 adopts a "spray + packing" design. The spray system sprays atomized water, and the packing layer provides a large specific surface area, allowing for full contact between air and water droplets. It performs secondary filtration of residual paint mist (<1μm) and absorbs water-soluble waste gas at the same time, reducing the paint mist emission concentration to below 5mg / m³, thus reducing the burden on subsequent purification processes.

[0056] Air containing VOCs enters through the inlet. The activated carbon adsorption bed 511 utilizes its high specific surface area (≥1000m² / g) and microporous structure (0.5-2nm) to physically adsorb harmful gases such as benzene compounds and ketones, achieving an adsorption efficiency of over 85%. Ultraviolet lamps 521 emit 185nm / 254nm ultraviolet light, which reacts with oxygen generated by the oxygen generator 522 to produce ozone (O3) and hydroxyl radicals (・OH), decomposing residual VOCs into CO2 and H2O, with a decomposition rate exceeding 95%. The purified air is discharged through the outlet, and all indicators meet the Class II standard of the "Integrated Emission Standard of Air Pollutants" (GB16297-1996).

[0057] Finally, it should be noted that the electronic components in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions, comprising a booth body (1), characterized in that: An air supply system (2) and an exhaust system (3) are installed on the outside of the room (1). The room (1) is treated by an environmental protection treatment unit. The environmental protection treatment unit includes a high-efficiency paint mist capture system (4) located inside the room (1). An activated carbon adsorption exhaust gas purification system (5) is installed on the outside of the room (1). A filter tower (6) is installed between the pipeline of the exhaust system (3) and the activated carbon adsorption exhaust gas purification system (5).

2. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 1, characterized in that: The high-efficiency paint mist collection system (4) includes an outer chamber, inside which a circulating water tank (41) is installed. Inside the circulating water tank (41) is a water pump (42). A water curtain plate (43) is installed on the lower side of the outer chamber. The circulating water tank (41) pumps water into the water curtain plate (43) through the water pump (42) to form a water curtain.

3. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 2, characterized in that: A water pool is provided on the bottom of the interior of the room (1). The water pool collects water from the water curtain plate (43) and returns the water from the water pool to the circulating water tank (41) through the input pipe of the water pump (42).

4. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 2, characterized in that: The outer compartment is equipped with a paint mist collection chamber (44). The top of the paint mist collection chamber (44) is equipped with an exhaust fan (441) for paint mist collection. One side of the paint mist collection chamber (44) is equipped with an exhaust port that connects to the water curtain plate (43) to discharge the air after paint mist collection.

5. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 1, characterized in that: The purification system (5) includes an outer shell, and the interior of the outer shell is divided into two compartments by a partition. The partition has vent holes for the gas to pass through the two compartments. One compartment is an active adsorption compartment (51), and the other compartment is a photocatalytic oxidation compartment (52).

6. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 5, characterized in that: The activated adsorption chamber (51) is equipped with an adsorption bed (511) made of activated carbon material.

7. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 5, characterized in that: The inner wall of the photocatalytic oxidation chamber (52) is equipped with an ultraviolet lamp (521) and an oxygen generator (522), which are symmetrically installed.

8. The environmentally friendly paint spray booth with efficient paint mist treatment and exhaust gas purification functions according to claim 5, characterized in that: The active adsorption chamber (51) has an air inlet on one side for the air to be purified to enter, and the photocatalytic oxidation chamber (52) has an air outlet on one side for the clean air to be discharged.

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