Waste gas treatment device for coating production

Abstract

The utility model discloses a waste gas treatment device for coating production, which belongs to the technical field of waste gas treatment and is characterized in that waste gas for coating production is discharged into a spraying tank through a gas inlet pipe and is uniformly discharged upwards from the lower end of the spraying tank through a gas inlet ring and a gas outlet pipe, and spraying liquid contained at the lower end of the spraying tank is sprayed out from a spraying head through a spraying pipe and a spraying pump. Waste gas is sprayed, the sprayed gas is introduced into the catalysis box through the connecting pipe, titanium dioxide on the catalysis net generates electrons and positive hole pairs through ultraviolet rays, the electrons and the positive hole pairs are continuously subjected to reduction and oxidation reactions on the surface of the catalysis net, and a series of active groups with oxidation capacity are generated; harmful substances in the waste gas are oxidized and decomposed into harmless substances through the active groups, so that the purification of the waste gas is realized. The device has the advantages of good waste gas treatment effect, low equipment investment and the like.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a waste gas treatment device for paint production. Background Technology

[0002] The generation of waste gas is unavoidable during the paint production process. This waste gas may contain a large number of harmful substances, such as organic solvents, heavy metals, and harmful chemicals, posing a significant threat to the environment and human health. Existing waste gas treatment devices are not ideal in terms of treatment effectiveness and suffer from problems such as high treatment costs and complex operation.

[0003] In workshop production, when treating exhaust gas through filtration and adsorption, there are problems such as filter plates being prone to clogging, and the clogging material being difficult to remove. Each time, the filter needs to be removed, which is time-consuming, labor-intensive, and affects production. Moreover, the filtered exhaust gas directly enters the adsorption device, which greatly increases the amount of adsorbent used and increases production costs.

[0004] Chinese patent CN221359170U, published on July 19, 2024, discloses a waste gas treatment device for paint production. The device includes a buffer tank connected to a spray tank via a filter flusher. The spray tank is connected to an adsorption tank via an induced draft fan. The filter flusher contains an L-shaped filter plate that divides it into a filter chamber and an outlet chamber. A spray scraper is installed inside the filter chamber, and a hydraulic telescopic device is connected to the spray scraper. This device has the limitation of ineffectively treating harmful gases that are insoluble in the spray tank, resulting in incomplete waste gas treatment. Utility Model Content

[0005] The purpose of this invention is to solve the problems of existing technologies and provide a waste gas treatment device for paint production. The waste gas from paint production is discharged into a spray tank through an inlet pipe, and then evenly discharged from the bottom to the top of the spray tank through an inlet ring and an outlet pipe. The spray liquid contained at the bottom of the spray tank is sprayed from the spray head through a spray pipe and a spray pump to spray the waste gas. The sprayed gas is then introduced into a catalytic chamber through a connecting pipe. Ultraviolet light causes the titanium dioxide on the catalytic mesh to generate electron-hole pairs, which continuously undergo reduction and oxidation reactions on the surface of the catalytic mesh, producing a series of active groups with oxidizing capabilities. These active groups oxidize and decompose harmful substances in the waste gas into harmless substances, thus purifying the waste gas. This invention has the advantages of good waste gas treatment effect and low equipment investment.

[0006] This utility model is achieved through the following technical solution:

[0007] A waste gas treatment device for paint production includes a spray tank and a catalytic converter. An air inlet pipe is located at the bottom of the spray tank, extending into the lower part of the spray tank and connecting to an air inlet ring located inside the spray tank. Multiple air outlet pipes are located on the air inlet ring. Spray heads are also installed inside the spray tank. The top of the spray tank is connected to the catalytic converter via a connecting pipe. An ultraviolet lamp and a catalytic screen are installed inside the catalytic converter. An exhaust pipe is also located at the end of the catalytic converter furthest from the connecting pipe. The lower end of the spray tank is connected to the spray heads via a spray pipe and a spray pump.

[0008] Preferably, the catalytic chamber is equipped with at least two ultraviolet lamps and at least two catalytic screens.

[0009] Preferably, an exhaust fan is provided on the air intake pipe.

[0010] Preferably, the spray head is located in the upper middle part inside the spray tank.

[0011] Preferably, the upper end of the spray tank is shaped like an inverted funnel.

[0012] Preferably, a water removal screen is also provided at the upper end of the spray head.

[0013] Preferably, the lower end of the spray tank is funnel-shaped.

[0014] Preferably, the lower end of the spray tank is connected to the settling tank.

[0015] Preferably, at least one overflow weir is provided in the settling tank.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] I. This utility model provides a waste gas treatment device for paint production. Waste gas from paint production is discharged into a spray tank through an inlet pipe, and then evenly discharged from the bottom to the top of the spray tank through an inlet ring and an outlet pipe. Spray liquid held at the bottom of the spray tank is sprayed from the spray head through a spray pipe and a spray pump to spray the waste gas. The sprayed gas is then introduced into a catalytic chamber through a connecting pipe. Ultraviolet light causes the titanium dioxide on the catalytic mesh to generate electron-hole pairs, which continuously undergo reduction and oxidation reactions on the surface of the catalytic mesh, producing a series of active groups with oxidizing capabilities. These active groups oxidize and decompose harmful substances in the waste gas into harmless substances, thus purifying the waste gas. This utility model has the advantages of good waste gas treatment effect and low equipment investment.

[0018] II. The waste gas treatment device for paint production provided by this utility model has multiple sets of ultraviolet lamps and catalytic mesh to further decompose the waste gas, resulting in better waste gas purification effect.

[0019] III. The waste gas treatment device for paint production provided by this utility model has an exhaust fan installed on the air inlet pipe, which makes it easier for the waste gas to enter the spray tank.

[0020] IV. The present invention provides a waste gas treatment device for paint production, wherein the setting of the water removal net removes moisture from the sprayed gas.

[0021] V. The present invention provides a waste gas treatment device for paint production, wherein the spray liquid enters the settling tank for settling, and the settling spray liquid flows out through the overflow weir, and then sprays again through the spray pipe, spray pump and spray head. The sediment remains in the settling tank to avoid clogging of the spray pipe and spray head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0024] The components include: 1. Spray tank; 2. Catalytic converter; 3. Inlet pipe; 4. Inlet ring; 5. Outlet pipe; 6. Spray head; 7. Ultraviolet lamp; 8. Catalytic screen; 9. Connecting pipe; 10. Exhaust pipe; 11. Spray pipe; 13. Exhaust fan; 14. Water removal screen; 15. Settling tank; 16. Overflow weir; 17. Spray pump. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a waste gas treatment device for paint production, including a spray tank 1 and a catalytic converter 2. An air inlet pipe 3 is located at the bottom of the spray tank 1, extending into the lower part of the spray tank 1 and connecting to an air inlet ring 4 located within the spray tank 1. Multiple air outlet pipes 5 are located on the air inlet ring 4. Spray heads 6 are also installed inside the spray tank 1. The upper part of the spray tank 1 is connected to the catalytic converter 2 via a connecting pipe 9. An ultraviolet lamp 7 and a catalytic mesh 8 are installed inside the catalytic converter 2. An exhaust pipe 10 is also installed at the end of the catalytic converter 2 furthest from the connecting pipe 9. The lower end of the spray tank 1 is connected to the spray heads 6 via a spray pipe 11 and a spray pump 17. The catalytic converter 2 has openings at both ends, connected to the connecting pipe 9 and the exhaust pipe 10 respectively. The middle of the catalytic converter 2 is a catalytic chamber, in which the ultraviolet lamp 7 and the catalytic mesh 8 are located.

[0028] Example 2

[0029] like Figure 2As shown, this embodiment provides a waste gas treatment device for paint production, including a spray tank 1 and a catalytic converter 2. An air inlet pipe 3 is located at the bottom of the spray tank 1, extending into the lower part of the spray tank 1 and connecting to an air inlet ring 4 located within the spray tank 1. Multiple air outlet pipes 5 are located on the air inlet ring 4. Spray heads 6 are also installed inside the spray tank 1. The upper part of the spray tank 1 is connected to the catalytic converter 2 via a connecting pipe 9. An ultraviolet lamp 7 and a catalytic mesh 8 are installed inside the catalytic converter 2. An exhaust pipe 10 is also installed at the end of the catalytic converter 2 furthest from the connecting pipe 9. The lower end of the spray tank 1 is connected to the spray heads 6 via a spray pipe 11 and a spray pump 17. The catalytic converter 2 has openings at both ends, connected to the connecting pipe 9 and the exhaust pipe 10 respectively. The middle of the catalytic converter 2 is a catalytic chamber, in which the ultraviolet lamp 7 and the catalytic mesh 8 are located.

[0030] The catalytic chamber 2 is equipped with at least two ultraviolet lamps 7 and at least two catalytic meshes 8. The catalytic meshes 8 are made of titanium dioxide.

[0031] The intake pipe 3 is equipped with an exhaust fan 13.

[0032] The spray head 6 is located in the upper middle part inside the spray tank 1.

[0033] The upper end of the spray tank 1 is shaped like an inverted funnel.

[0034] The spray head 6 is also equipped with a water removal screen 14 at its upper end. The water removal screen 14 is made of absorbent silicone and is fixedly installed on the water removal screen 14.

[0035] The lower end of the spray tank 1 is funnel-shaped.

[0036] The lower end of the spray tank 1 is connected to the settling tank 15.

[0037] The settling tank 15 is equipped with at least one overflow weir 16. The front end of the overflow weir 16 is connected to the lower end of the spray tank 1, and the rear end of the overflow weir 16 is connected to the spray pipe 11. The overflow weir 16 increases in height from left to right.

[0038] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0039] I. This utility model provides a waste gas treatment device for paint production. Waste gas from paint production is discharged into a spray tank 1 through an inlet pipe 3, and then evenly discharged upwards from the lower end of the spray tank 1 through an inlet ring 4 and an outlet pipe 5. Spray liquid contained at the lower end of the spray tank 1 is sprayed out from the spray head 6 through a spray pipe 11 and a spray pump 17 to spray the waste gas. The sprayed gas is then introduced into a catalytic chamber 2 through a connecting pipe 9. Ultraviolet light causes the titanium dioxide on the catalytic mesh 8 to generate electron-hole pairs, which continuously undergo reduction and oxidation reactions on the surface of the catalytic mesh 8, producing a series of active groups with oxidizing capabilities. These active groups oxidize and decompose harmful substances in the waste gas into harmless substances, thus purifying the waste gas. This utility model has the advantages of good waste gas treatment effect and low equipment investment.

[0040] II. The waste gas treatment device for paint production provided by this utility model has multiple sets of ultraviolet lamps 7 and catalytic mesh 8, which further decompose the waste gas and make the waste gas purification effect better.

[0041] III. The waste gas treatment device for paint production provided by this utility model has an exhaust fan 13 installed on the air inlet pipe 3, which makes it easier for the waste gas to enter the spray tank 1.

[0042] IV. The present invention provides a waste gas treatment device for paint production, wherein the water removal net 14 removes moisture from the sprayed gas.

[0043] V. The present invention provides a waste gas treatment device for paint production. The spray liquid enters the settling tank 15 to settle. After settling, the spray liquid flows out through the overflow weir 16 and then sprays again through the spray pipe 11, the spray pump 17 and the spray head 6. The sediment remains in the settling tank 15 to avoid clogging of the spray pipe 11 and the spray head 6.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An exhaust gas treatment device for paint production, characterized by: The utility model relates to a catalytic tank and spray tank, which comprises a spray tank (1) and a catalytic tank (2), wherein the bottom of the spray tank (1) is provided with an air inlet pipe (3) which penetrates into the lower part of the spray tank (1) and is connected with an air inlet ring (4) arranged in the spray tank (1), the air inlet ring (4) is provided with a plurality of air outlet pipes (5), the spray tank (1) is further provided with a spray head (6), the top of the spray tank (1) is connected with the catalytic tank (2) through a connecting pipe (9), the catalytic tank (2) is provided with ultraviolet lamps (7) and catalytic nets (8), the catalytic tank (2) is further provided with an air outlet pipe (10) at the end away from the connecting pipe (9), and the lower end of the spray tank (1) is connected with the spray head (6) through a spray pipe (11) and a spray pump (17).

2. The waste gas treatment device for paint production according to claim 1, characterized in that: The catalytic tank (2) is provided with at least two ultraviolet lamps (7) and at least two catalytic nets (8).

3. The waste gas treatment device for paint production according to claim 1, characterized in that: The air inlet pipe (3) is provided with an air blower (13).

4. The waste gas treatment device for paint production according to claim 1, characterized in that: The spray head (6) is arranged in the middle upper part of the spray tank (1).

5. The waste gas treatment device for paint production according to claim 1, characterized in that: The upper end of the spray tank (1) is in the shape of an inverted funnel.

6. The waste gas treatment device for paint production according to claim 5, characterized in that: The upper end of the spray head (6) is further provided with a water removal net (14).

7. The waste gas treatment device for paint production according to claim 6, characterized in that: The lower end of the spray tank (1) is in the shape of a funnel.

8. The waste gas treatment device for paint production according to claim 7, characterized in that: The lower end of the spray tank (1) is connected with a sedimentation tank (15).

9. The waste gas treatment device for paint production according to claim 8, characterized in that: The sedimentation tank (15) is provided with at least one overflow weir (16).

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