A paint spray exhaust treatment device

Abstract

The utility model discloses a kind of paint spray exhaust treatment equipment, it is related to waste gas treatment technical field, including pretreatment tank, plasma reaction tank and photocatalytic reaction tank, the side of the pretreatment tank is equipped with waste gas inlet, the other side of the pretreatment tank is fixedly installed with conveying pipe, the other end of the conveying pipe is fixedly installed with plasma reaction tank, the other side of the plasma reaction tank is fixedly installed with first gas-liquid separator, the other end of the first gas-liquid separator is fixedly installed with photocatalytic reaction tank, the other end of the photocatalytic reaction tank is fixedly installed with second gas-liquid separator, the other end of the second gas-liquid separator is fixedly installed with adsorption tank. The utility model is through pretreatment, plasma purification, photocatalytic oxidation and the multistage collaborative processing of adsorption, can remove paint mist particle, acidic substance, volatile organic compound and other various harmful substances in turn, comprehensively improve purification effect, ensure that waste gas is discharged up to standard.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a paint spraying waste gas treatment device. Background Technology

[0002] The painting process generates a large amount of waste gas containing harmful substances such as volatile organic compounds and paint mist particles. If these waste gases are directly discharged into the atmosphere, they will not only cause serious environmental pollution, but also harm human health. There are many types of existing paint spraying waste gas treatment equipment, such as adsorption treatment equipment, combustion treatment equipment, and absorption treatment equipment.

[0003] However, existing paint spraying exhaust gas treatment equipment has some shortcomings in practical applications. Adsorption treatment equipment usually uses adsorption materials such as activated carbon, which need to be replaced frequently after adsorption saturation, which not only increases operating costs but may also generate secondary pollution. Combustion treatment equipment has high energy consumption and is not ideal for treating some low-concentration paint spraying exhaust gases. Absorption treatment equipment has problems such as frequent replacement of absorbent liquid and unstable treatment effect. At the same time, most existing paint spraying exhaust gas treatment equipment has a simple structure and can only treat one type of harmful substance in the exhaust gas, making it difficult to achieve efficient synergistic purification of multiple harmful substances in paint spraying exhaust gas. The treated exhaust gas often fails to meet strict emission standards. Therefore, we propose a paint spraying exhaust gas treatment equipment. Utility Model Content

[0004] In view of the problems existing in the above-mentioned paint spraying exhaust gas treatment equipment, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a painting exhaust gas treatment device that solves some shortcomings of existing painting exhaust gas treatment devices in practical applications. Adsorption treatment devices usually use adsorption materials such as activated carbon, which need to be replaced frequently after adsorption saturation, which not only increases operating costs but may also generate secondary pollution. Combustion treatment devices have high energy consumption and are not ideal for treating some low-concentration painting exhaust gases. Absorption treatment devices have problems such as frequent replacement of absorbent liquid and unstable treatment effect. At the same time, most existing painting exhaust gas treatment devices have a simple structure and can only treat one type of harmful substance in the exhaust gas, making it difficult to achieve efficient synergistic purification of multiple harmful substances in the painting exhaust gas. The treated exhaust gas often fails to meet the strict emission standards.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A paint spraying exhaust gas treatment device includes a pretreatment box, a plasma reaction box, and a photocatalytic reaction box. The pretreatment box has an exhaust gas inlet on one side and a conveying pipe fixedly installed on the other side. The plasma reaction box is fixedly installed at the other end of the conveying pipe. A first gas-liquid separator is fixedly installed on the other side of the plasma reaction box. The photocatalytic reaction box is fixedly installed at the other end of the first gas-liquid separator. A second gas-liquid separator is fixedly installed at the other end of the photocatalytic reaction box. An adsorption box is fixedly installed at the other end of the second gas-liquid separator. An exhaust gas outlet is fixedly installed on the top of the adsorption box.

[0008] Preferably, a filter layer is fixedly installed inside the pretreatment box on the side of the exhaust gas inlet. The filter layer is a composite layer of glass fiber and activated carbon fiber. Two spray pipes are fixedly installed on the other side of the pretreatment box. Each of the two spray pipes has multiple spray heads at its bottom. A connecting pipe is fixedly installed between the two spray pipes.

[0009] Preferably, a liquid storage tank is fixedly installed on the top of the pretreatment tank, and a water pump is fixedly installed inside the pretreatment tank. One end of the water pump extends into the liquid storage tank, and the other end of the water pump is fixedly connected to the surface of the connecting pipe.

[0010] Preferably, multiple plasma generators are fixedly installed inside the plasma reaction chamber. Each of the multiple plasma generators includes a discharge electrode and a grounding electrode. The multiple discharge electrodes pass through the top of the plasma reaction chamber and are connected to a high-voltage power supply. The inside of the plasma reaction chamber is coated with a nano-titanium dioxide coating.

[0011] Preferably, a plurality of ultraviolet lamps are fixedly installed on one side of the inside of the photocatalytic reaction chamber, and a stainless steel mesh is fixedly installed on the other side of the photocatalytic reaction chamber, the surface of which is coated with nano-titanium dioxide photocatalyst.

[0012] Preferably, a liquid collection tank is fixedly installed at the bottom of the photocatalytic reaction box, and a circulation pipe is provided between one side of the liquid collection tank and one side of the liquid storage tank, and a circulation pump is provided on the surface of the circulation pipe.

[0013] Preferably, the adsorption box has multiple adsorbent layers fixedly installed inside, and each adsorbent layer contains a mixture of activated carbon and molecular sieve adsorbent, with a mass ratio of activated carbon to molecular sieve of 3:1.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model, through multi-stage synergistic treatment of pretreatment, plasma purification, photocatalytic oxidation and adsorption, can sequentially remove various harmful substances such as paint mist particles, acidic substances, and volatile organic compounds, comprehensively improving the purification effect and ensuring that the exhaust gas meets emission standards. At the same time, the liquid collection tank of the photocatalytic reaction box and the liquid storage tank of the pretreatment box are connected by a circulation pipeline to realize the recycling of the absorbent and reduce the frequency of absorbent replacement. The adsorbent uses a mixture of activated carbon and molecular sieves to improve the adsorption capacity and service life and reduce the cost of adsorbent replacement.

[0016] 2. This utility model can effectively treat harmful substances through the composite filter material of the filter layer, the decomposition effect of plasma, and the deep adsorption of the adsorbent, avoiding the secondary pollution problem that may occur after the adsorbent material is saturated in the traditional adsorption method. At the same time, the setting of the first gas-liquid separator and the second gas-liquid separator can effectively separate the liquid in the waste gas and prevent the liquid from entering the subsequent treatment device and affecting the purification effect. The devices are connected in an orderly manner through pipelines, so that the waste gas treatment process is smooth and efficient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the pretreatment box of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the plasma reaction chamber and photocatalytic reaction chamber of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the adsorption box of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Pretreatment box; 2. Plasma reaction box; 3. Photocatalytic reaction box; 4. Exhaust gas inlet; 5. Conveying pipe; 6. First gas-liquid separator; 7. Second gas-liquid separator; 8. Adsorption box; 9. Exhaust gas outlet; 10. Filter layer; 11. Spray pipe; 12. Spray head; 13. Connecting pipe; 14. Liquid storage tank; 15. Water pump; 16. Plasma generator; 17. Discharge electrode; 18. Grounding electrode; 19. Nano titanium dioxide coating; 20. Ultraviolet lamp tube; 21. Stainless steel mesh; 22. Liquid collection tank; 23. Circulation pipe; 24. Circulation pump; 25. Adsorbent layer. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses a spray painting exhaust gas treatment device.

[0026] This utility model provides, for example Figures 1-4 The painting exhaust gas treatment equipment shown includes a pretreatment box 1, a plasma reaction box 2, and a photocatalytic reaction box 3. The pretreatment box 1 has an exhaust gas inlet 4 on one side and a conveying pipe 5 fixedly installed on the other side. The plasma reaction box 2 is fixedly installed at the other end of the conveying pipe 5. A first gas-liquid separator 6 is fixedly installed on the other side of the plasma reaction box 2. The photocatalytic reaction box 3 is fixedly installed at the other end of the first gas-liquid separator 6. A second gas-liquid separator 7 is fixedly installed at the other end of the photocatalytic reaction box 3. An adsorption box 8 is fixedly installed at the other end of the second gas-liquid separator 7. An exhaust gas outlet 9 is fixedly installed on the top of the adsorption box 8. This multi-stage synergistic purification system effectively removes paint mist particles, volatile organic compounds, and other harmful substances from the paint exhaust gas, achieving high treatment efficiency and ensuring that the treated exhaust gas meets emission standards.

[0027] This utility model discloses a paint spraying exhaust gas treatment device. The pretreatment box 1 is located on one side of the exhaust gas inlet 4 and has a filter layer 10 fixedly installed inside. The filter layer 10 is a composite layer of glass fiber and activated carbon fiber. Two spray pipes 11 are fixedly installed at both ends on the other side of the pretreatment box 1. The bottom of each of the two spray pipes 11 is provided with multiple spray heads 12. A connecting pipe 13 is fixedly installed between the two spray pipes 11. It can not only effectively filter paint mist particles, but also has a certain adsorption capacity, and can initially adsorb some volatile organic compounds in the exhaust gas.

[0028] This utility model discloses a paint spraying exhaust gas treatment device. A liquid storage tank 14 is fixedly installed on the top of the pretreatment tank 1. A water pump 15 is fixedly installed inside the pretreatment tank 1. One end of the water pump 15 extends into the liquid storage tank 14, and the other end of the water pump 15 is fixedly connected to the surface of the connecting pipe 13. This device can neutralize acidic substances in the exhaust gas and further purify the exhaust gas.

[0029] This utility model discloses a paint spraying exhaust gas treatment device. The plasma reaction chamber 2 is equipped with multiple plasma generators 16, each of which includes a discharge electrode 17 and a grounding electrode 18. The discharge electrodes 17 are connected to a high-voltage power supply through the top of the plasma reaction chamber 2. The plasma reaction chamber 2 is equipped with a nano-titanium dioxide coating 19, which can generate a large number of high-energy electrons, free radicals and other active particles, which react chemically with harmful substances in the exhaust gas and decompose them into harmless substances.

[0030] This utility model discloses a paint spraying exhaust gas treatment device. Multiple ultraviolet lamps 20 are fixedly installed on one side of the photocatalytic reaction chamber 3, and a stainless steel mesh 21 is fixedly installed on the other side of the photocatalytic reaction chamber 3. The surface of the stainless steel mesh 21 is coated with nano-titanium dioxide photocatalyst. The ultraviolet lamps 20 emit ultraviolet light, exciting the nano-titanium dioxide photocatalyst on the photocatalytic mesh to generate active substances such as hydroxyl radicals, which react with the volatile organic compounds in the exhaust gas to decompose them into carbon dioxide and water.

[0031] This utility model discloses a paint spraying waste gas treatment device. The bottom of the photocatalytic reaction box 3 is fixedly installed with a liquid collection tank 22. A circulation pipe 23 is provided between one side of the liquid collection tank 22 and one side of the liquid storage tank 14. A circulation pump 24 is provided on the surface of the circulation pipe 23, which realizes the recycling of the absorbent liquid and reduces the operating cost.

[0032] This utility model discloses a paint spraying exhaust gas treatment device. The adsorption box 8 has multiple adsorbent layers 25 fixedly installed inside. The adsorbent layer 25 contains a mixture of activated carbon and molecular sieve adsorbent, and the mass ratio of activated carbon to molecular sieve is 3:1. This allows for deep adsorption of the small amount of harmful substances remaining after the previous treatment, ensuring the purification effect of the exhaust gas.

[0033] When the paint spraying exhaust gas treatment equipment is in use, the paint spraying exhaust gas first enters the pretreatment box 1 through the exhaust gas inlet 4. It first passes through a filter layer 10 composed of glass fiber and activated carbon fiber, which effectively filters out paint mist particles in the exhaust gas. Simultaneously, the activated carbon fiber initially adsorbs some volatile organic compounds. Next, the alkaline absorbent liquid in the storage tank 14 at the top of the pretreatment box 1 is pumped by the water pump 15 through the connecting pipe 13 to two spray pipes 11. The exhaust gas is then sprayed through the spray nozzles 12 to neutralize acidic substances in the exhaust gas, further purifying it. The pretreated exhaust gas then enters the plasma reaction box 2 through the conveying pipe 5. Multiple plasma generators 16 inside the box, under the action of a high-voltage power supply, generate a large number of high-energy electrons, free radicals, and other active particles through the discharge electrode 17 and grounding electrode 18. These active particles chemically react with harmful substances in the exhaust gas, decomposing them. Simultaneously, the plasma reaction box 2... The internal nano-titanium dioxide coating 19 generates photocatalysis under the action of plasma, which helps to purify the waste gas. The treated waste gas enters the first gas-liquid separator 6, and after the liquid is separated, it enters the photocatalytic reaction chamber 3. The ultraviolet lamp 20 in the photocatalytic reaction chamber 3 emits ultraviolet light, which excites the nano-titanium dioxide photocatalyst coated on the surface of the stainless steel mesh 21 to generate active substances such as hydroxyl radicals, which react with the volatile organic compounds in the waste gas to decompose them into carbon dioxide and water. The liquid generated during the reaction is collected in the collection tank 22 and returned to the storage tank 14 through the circulation pipe 23 under the action of the circulation pump 24, realizing the recycling of the absorbent liquid. Subsequently, the waste gas enters the adsorption chamber 8 after the liquid is separated again by the second gas-liquid separator 7. The multi-layer adsorbent layer 25 in the chamber is a mixture of activated carbon and molecular sieve with a mass ratio of 3:1 to deeply adsorb residual harmful substances. Finally, the purified waste gas is discharged from the waste gas outlet 9.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A paint spraying exhaust gas treatment device, comprising a pretreatment chamber (1), a plasma reaction chamber (2), and a photocatalytic reaction chamber (3), characterized in that, The pretreatment box (1) has a waste gas inlet (4) on one side and a conveying pipe (5) fixedly installed on the other side. A plasma reaction box (2) is fixedly installed at the other end of the conveying pipe (5). A first gas-liquid separator (6) is fixedly installed on the other side of the plasma reaction box (2). A photocatalytic reaction box (3) is fixedly installed at the other end of the first gas-liquid separator (6). A second gas-liquid separator (7) is fixedly installed at the other end of the photocatalytic reaction box (3). An adsorption box (8) is fixedly installed at the other end of the second gas-liquid separator (7). A waste gas outlet (9) is fixedly installed on the top of the adsorption box (8).

2. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, The pretreatment box (1) is fixedly installed with a filter layer (10) inside the exhaust gas inlet (4). The filter layer (10) is a composite layer of glass fiber and activated carbon fiber. Two spray pipes (11) are fixedly installed on the other side of the pretreatment box (1). Multiple spray heads (12) are provided at the bottom of the two spray pipes (11). A connecting pipe (13) is fixedly installed between the two spray pipes (11).

3. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, A liquid storage tank (14) is fixedly installed on the top of the pretreatment tank (1), and a water pump (15) is fixedly installed inside the pretreatment tank (1). One end of the water pump (15) extends into the liquid storage tank (14), and the other end of the water pump (15) is fixedly connected to the surface of the connecting pipe (13).

4. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, The plasma reaction chamber (2) is fixedly installed with multiple plasma generators (16). Each of the multiple plasma generators (16) includes a discharge electrode (17) and a grounding electrode (18). The multiple discharge electrodes (17) pass through the top of the plasma reaction chamber (2) and are connected to a high-voltage power supply. The plasma reaction chamber (2) is provided with a nano titanium dioxide coating (19).

5. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, Multiple ultraviolet lamps (20) are fixedly installed on one side of the photocatalytic reaction box (3), and a stainless steel mesh (21) is fixedly installed on the other side of the photocatalytic reaction box (3). The surface of the stainless steel mesh (21) is coated with nano-titanium dioxide photocatalyst.

6. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, The bottom of the photocatalytic reaction box (3) is fixedly installed with a liquid collection tank (22), and a circulation pipe (23) is provided between one side of the liquid collection tank (22) and one side of the liquid storage tank (14). A circulation pump (24) is provided on the surface of the circulation pipe (23).

7. The paint spraying exhaust gas treatment equipment according to claim 1, characterized in that, The adsorption box (8) has multiple adsorbent layers (25) fixedly installed inside. The adsorbent layer (25) contains a mixture of activated carbon and molecular sieve adsorbent, and the mass ratio of activated carbon to molecular sieve is 3:1.

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