Pretreatment device for automobile coating organic waste gas

Abstract

The utility model relates to the technical field of automobile coating waste gas treatment, and discloses a pretreatment device for automobile coating organic waste gas, which comprises a mixing box, a combustion box and a purification box, a gas inlet pipe is fixed on the left side of the mixing box, a filter screen is fixed inside the gas inlet pipe, a slag discharge pipe is fixed on the surface of the gas inlet pipe, and a gas outlet pipe is fixed on the left side of the combustion box. A catalyst pipe is fixed to the upper surface of the mixing box, a first air extractor is fixed to the right side of the mixing box, a first air conveying pipe is fixed between the first air extractor and the combustion box, a combustion chamber is formed in the combustion box, and a combustor is fixed to the upper surface of the combustion box. A flame projector is fixed to the bottom end of the combustor and located in the combustion chamber. According to the pretreatment device for the automobile coating organic waste gas, the organic waste gas is poured into the mixing box and mixed with the catalyst in the mixing box, the organic waste gas can be catalytically combusted through the combustion box, and then carbon dioxide gas generated after combustion can be purified and discharged through the purification box.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile painting waste gas treatment, in particular to a pre-treatment device for automobile painting organic waste gas. Background Technique

[0002] A large amount of organic waste gas will be generated during the painting process of automobile production. If the waste gas is directly discharged, it will cause certain pollution to the environment. Therefore, the discharged organic waste gas needs to be treated before it can be discharged. Most of the existing organic waste gas treatment methods directly filter the waste gas through a filter screen, but such waste gas purification treatment methods are not obvious enough, so that the discharged waste gas will still have a certain degree of pollution, thereby reducing the treatment effect of organic waste gas. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a pre-treatment device for automobile painting organic waste gas, which solves the problem that it is inconvenient to efficiently purify the organic waste gas generated during the automobile painting process.

[0004] To achieve the purpose of facilitating the efficient purification of organic waste gas generated during the automobile painting process, the utility model provides the following technical solution: A pre-treatment device for automobile painting organic waste gas, including a mixing box, a combustion box and a purification box. An air inlet pipe is fixed on the left side of the mixing box, a filter screen is fixed inside the air inlet pipe, a slag discharge pipe is fixed on the surface of the air inlet pipe, a catalyst pipe is fixed on the upper surface of the mixing box, a first air extractor is fixed on the right side of the mixing box, and a first air delivery pipe is fixed between the first air extractor and the combustion box. A combustion chamber is opened inside the combustion box, a burner is fixed on the upper surface of the combustion box, and a flame sprayer is fixed at the bottom end of the burner and inside the combustion chamber;

[0005] A pressure relief valve is fixed on the upper surface of the combustion box, a second air extractor is fixed on the bottom surface of the combustion box, a return pipe is fixed between the second air extractor and the first air delivery pipe, a one-way air valve is fixed inside the return pipe, a preheating pipe cavity is opened inside the first air delivery pipe, a communication port is opened at the preheating pipe cavity, a ceramic heat storage cavity is opened outside the combustion chamber inside the combustion box, a drain pipe is fixed on the right side of the combustion box, a third air extractor is fixed on the left side surface of the purification box, a second air delivery pipe is fixed between the third air extractor and the combustion box, an exhaust pipe is fixed on the upper surface of the purification box, an activated carbon column is fixed inside the exhaust pipe, and a purification solution is arranged inside the purification box.

[0006] Preferably, the purification solution is a potassium permanganate solution. The second air delivery pipe extends into the purification tank and is inserted into the purification solution, and the second air delivery pipe does not contact the inner bottom surface of the purification tank.

[0007] Preferably, the ceramic heat storage cavity is communicated with the preheating pipe cavity through a communication port. The preheating pipe cavity is located outside the inner cavity of the first air delivery pipe. The left end of the return pipe is communicated with the first air delivery pipe, and the right side of the return pipe is communicated with the combustion chamber and extends above the inner bottom surface of the combustion chamber.

[0008] Preferably, the first air delivery pipe, the pressure relief valve, the return pipe and the second air delivery pipe are all communicated with the combustion chamber.

[0009] Preferably, the filter screen is located on the right side of the slag discharge pipe. The slag discharge pipe is located on the lower side of the outer surface of the air inlet pipe. The bottom end of the slag discharge pipe is threadedly connected with a sealing cover.

[0010] Preferably, the mixing tank is communicated with the combustion tank through the first air delivery pipe, and the combustion tank is communicated with the purification tank through the second air delivery pipe.

[0011] Compared with the prior art, the present utility model provides a pre-treatment device for automotive painting organic waste gas, having the following beneficial effects:

[0012] 1. For the pre-treatment device for automotive painting organic waste gas, the organic waste gas and the catalyst can be introduced into the combustion chamber through the first air extractor and the first air delivery pipe. At this time, the burner makes the torch spray fire and catalytically combusts the organic waste gas. After the catalytic combustion of the organic waste gas, carbon dioxide and water are generated. At the same time, the carbon dioxide generated by combustion can be introduced into the purification tank through the third air extractor and the second air delivery pipe and fully mixed with the purification solution in the purification tank. Therefore, the carbon dioxide can be purified, and the gas generated by the mixing of carbon dioxide and the purification solution can be discharged after being purified by the activated carbon column. Therefore, the treatment effect of the organic waste gas can be improved.

[0013] 2. For the pre-treatment device for automotive painting organic waste gas, the heat generated by combustion in the combustion chamber can enter the ceramic heat storage cavity and the preheating pipe cavity. The ceramic heat storage cavity can keep the temperature of the combustion chamber and store heat, and the preheating pipe cavity can preheat the organic waste gas and the catalyst inside it in advance, so that when the organic waste gas and the catalyst enter the combustion chamber, they can be directly combusted to improve the combustion effect. At the same time, through the second air extractor and the return pipe, the unburned gas can be mixed with the catalyst inside the mixing tank again. Therefore, the unburned gas can be mixed with the catalyst and combusted again, so that the waste gas can be fully catalytically combusted and treated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a partial cross-sectional view of the structure of the present utility model;

[0016] Figure 3 is the present utility model Figure 2 a partially enlarged schematic view of the structure at position A in;

[0017] Figure 4 is the main cross-sectional view of the structure of the present utility model.

[0018] Wherein: 1, mixing box; 2, combustion box; 3, purification box; 4, intake pipe; 5, filter screen; 6, slag discharge pipe; 7, catalyst pipe; 8, first air extractor; 9, first air delivery pipe; 10, combustion chamber; 11, burner; 12, flame sprayer; 13, pressure relief valve; 14, second air extractor; 15, return pipe; 16, one-way air valve; 17, preheating pipe cavity; 18, communication port; 19, ceramic heat storage cavity; 20, drain pipe; 21, third air extractor; 22, second air delivery pipe; 23, exhaust pipe; 24, activated carbon column; 25, purification solution. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] Please refer to Figures 1-4 , the present utility model provides a pre-treatment device for automotive painting organic waste gas, including a mixing box 1, a combustion box 2 and a purification box 3. The left side of the mixing box 1 is fixed with an intake pipe 4. The inside of the intake pipe 4 is fixed with a filter screen 5. The surface of the intake pipe 4 is fixed with a slag discharge pipe 6. The upper surface of the mixing box 1 is fixed with a catalyst pipe 7. The right side of the mixing box 1 is fixed with a first air extractor 8. A first air delivery pipe 9 is fixed between the first air extractor 8 and the combustion box 2. The inside of the combustion box 2 is provided with a combustion chamber 10. The upper surface of the combustion box 2 is fixed with a burner 11. At the bottom end of the burner 11 and located inside the combustion chamber 10, a flame sprayer 12 is fixed;

[0021] A pressure relief valve 13 is fixed on the upper surface of the combustion chamber 2, a second air extractor 14 is fixed on the bottom surface of the combustion chamber 2, a return pipe 15 is fixed between the second air extractor 14 and the first gas pipeline 9, a check valve 16 is fixed inside the return pipe 15, a preheating pipe cavity 17 is provided inside the first gas pipeline 9, a communication port 18 is provided at the preheating pipe cavity 17, a ceramic heat storage cavity 19 is provided inside the combustion chamber 2 and outside the combustion chamber 10, a drain pipe 20 is fixed on the right side of the combustion chamber 2, a third air extractor 21 is fixed on the left side surface of the purification tank 3, a second gas pipeline 22 is fixed between the third air extractor 21 and the combustion chamber 2, an exhaust pipe 23 is fixed on the upper surface of the purification tank 3, an activated carbon column 24 is fixed inside the exhaust pipe 23, a purification solution 25 is provided inside the purification tank 3, organic waste gas can be introduced into the mixing tank 1 through the air inlet pipe 4, and solid particle impurities in the organic waste gas can be filtered through the filter screen 5, a catalyst can be added into the mixing tank 1 through the catalyst pipe 7, and the catalyst is fully mixed with the organic waste gas to facilitate subsequent treatment of the organic waste gas.

[0022] Further, the purification solution 25 is a potassium permanganate solution, the second gas pipeline 22 extends into the purification tank 3, and the second gas pipeline 22 is inserted into the purification solution 25, and the second gas pipeline 22 does not contact the inner bottom surface of the purification tank 3. Carbon dioxide generated by combustion can be transported into the purification tank 3 through the second gas pipeline 22 and fully mixed with the purification solution 25 in the purification tank 3, so that carbon dioxide can be treated, and the gas generated by the reaction of carbon dioxide and the purification solution 25 can be purified and discharged again by the activated carbon column 24.

[0023] Further, the ceramic heat storage cavity 19 is communicated with the preheating pipe cavity 17 through the communication port 18. The preheating pipe cavity 17 is located outside the inner cavity of the first gas pipeline 9. The left end of the return pipe 15 is communicated with the first gas pipeline 9, and the right side of the return pipe 15 is communicated with the combustion chamber 10 and extends above the inner bottom surface of the combustion chamber 10. Heat generated during combustion inside the combustion chamber 10 can enter the ceramic heat storage cavity 19, so that the ceramic heat storage cavity 19 can keep the combustion chamber 10 warm and store heat, and the heat inside the ceramic heat storage cavity 19 can transport the heat into the preheating pipe cavity 17 through the communication port 18 and preheat the gas inside the first gas pipeline 9.

[0024] Further, the first gas pipeline 9, the pressure relief valve 13, the return pipe 15 and the second gas pipeline 22 are all communicated with the combustion chamber 10. Exhaust gas can be input into the combustion chamber 10 through the first gas pipeline 9, the pressure inside the combustion chamber 10 can be relieved through the pressure relief valve 13, the gas that is not fully burned inside the combustion chamber 10 can be transported into the combustion chamber 10 again through the return pipe 15, and carbon dioxide generated by combustion can be discharged through the second gas pipeline 22.

[0025] Further, the filter screen 5 is located on the right side of the slag discharge pipe 6. The slag discharge pipe 6 is located on the lower side of the outer surface of the intake pipe 4. The bottom end of the slag discharge pipe 6 is threadedly connected with a sealing cover. The solid particle impurities in the organic gas can be filtered through the filter screen 5. By opening the sealing cover at the bottom end of the slag discharge pipe 6, the filtered particle impurities inside the slag discharge pipe 6 can be discharged.

[0026] Further, the mixing box 1 and the combustion box 2 are connected and communicated through the first gas transmission pipe 9. The combustion box 2 and the purification box 3 are connected and communicated through the second gas transmission pipe 22. The uniformly mixed organic waste gas and catalyst inside the mixing box 1 can be introduced into the combustion box 2 through the first gas transmission pipe 9, and the organic waste gas can be catalytically combusted. And the carbon dioxide generated after catalytic combustion can be introduced into the purification box 3 through the second gas transmission pipe 22, and the carbon dioxide is purified.

[0027] During use, the organic waste gas can be introduced into the mixing box 1 through the intake pipe 4, and the solid particle impurities in the organic waste gas can be filtered through the filter screen 5. The catalyst can be added into the mixing box 1 through the catalyst pipe 7, and the catalyst and the organic waste gas are fully mixed. The organic waste gas and the catalyst can be introduced into the combustion chamber 10 through the first air extractor 8 and the first gas transmission pipe 9. At this time, the burner 11 makes the flame sprayer 12 spray fire and catalytically combusts the organic waste gas. And carbon dioxide and water are generated after the catalytic combustion of the organic waste gas. At the same time, the carbon dioxide generated by combustion can be introduced into the purification box 3 through the third air extractor 21 and the second gas transmission pipe 22, and is fully mixed with the purification solution 25 in the purification box 3. Therefore, the carbon dioxide can be purified. And the gas generated by the mixing of the carbon dioxide and the purification solution 25 can be discharged after being purified by the activated carbon column 24. Therefore, the treatment effect on the organic waste gas can be improved. In addition, the heat generated by combustion in the combustion chamber 10 can enter the ceramic heat storage cavity 19 and the preheating pipe cavity 17. The combustion chamber 10 can be heat-insulated and heat-stored through the ceramic heat storage cavity 19, and the organic waste gas and the catalyst inside the preheating pipe cavity 17 can be preheated in advance, so that when the organic waste gas and the catalyst enter the combustion chamber 10, they can be directly combusted to improve the combustion effect. At the same time, the unburned gas can be mixed with the catalyst inside the mixing box 1 again through the second air extractor 14 and the return pipe 15, and the one-way gas valve 16 can prevent the gas inside the first gas transmission pipe 9 from directly entering the return pipe 15. Therefore, the unburned gas can be mixed with the catalyst and combusted again, so that the waste gas can be fully catalytically combusted.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-treatment device for automobile painting organic waste gas, comprising a mixing box (1), a combustion box (2) and a purification box (3), characterized in that: An air intake pipe (4) is fixed on the left side of the mixing box (1), a filter screen (5) is fixed inside the air intake pipe (4), a slag discharge pipe (6) is fixed on the surface of the air intake pipe (4), a catalyst tube (7) is fixed on the upper surface of the mixing box (1), a first air pump (8) is fixed on the right side of the mixing box (1), a first air supply pipe (9) is fixed between the first air pump (8) and the combustion box (2), a combustion chamber (10) is provided inside the combustion box (2), a burner (11) is fixed on the upper surface of the combustion box (2), and a flamethrower (12) is fixed at the bottom end of the burner (11) and inside the combustion chamber (10); A pressure relief valve (13) is fixed to the upper surface of the combustion box (2), a second air pump (14) is fixed to the bottom surface of the combustion box (2), a return pipe (15) is fixed between the second air pump (14) and the first gas supply pipe (9), a one-way gas valve (16) is fixed inside the return pipe (15), a preheating tube cavity (17) is provided inside the first gas supply pipe (9), a connecting port (18) is provided at the preheating tube cavity (17), and the interior of the combustion box (2) is located in the combustion chamber ( A ceramic heat storage chamber (19) is provided on the outside of the combustion box (10), a drainage pipe (20) is fixed on the right side of the combustion box (2), a third air pump (21) is fixed on the left side of the purification box (3), a second air supply pipe (22) is fixed between the third air pump (21) and the combustion box (2), an exhaust pipe (23) is fixed on the upper surface of the purification box (3), an activated carbon column (24) is fixed inside the exhaust pipe (23), and a purification solution (25) is arranged inside the purification box (3).

2. A pre-treatment device for automobile painting organic waste gas according to claim 1, characterized in that: The purification solution (25) is a potassium permanganate solution, the second gas supply pipe (22) extends to the interior of the purification box (3), and the second gas supply pipe (22) is inserted into the purification solution (25), and the second gas supply pipe (22) does not contact the inner bottom surface of the purification box (3).

3. The pre-treatment device for automobile painting organic waste gas according to claim 1, characterized in that: The ceramic heat storage chamber (19) is connected to the preheating tube chamber (17) through the connecting port (18); the preheating tube chamber (17) is located outside the inner cavity of the first gas supply pipe (9); the left end of the return pipe (15) is connected to the first gas supply pipe (9); the right side of the return pipe (15) is connected to the combustion chamber (10) and extends to above the inner bottom surface of the combustion chamber (10).

4. The pre-treatment device for automobile painting organic waste gas according to claim 1, characterized in that: The first gas supply pipe (9), the pressure relief valve (13), the return pipe (15) and the second gas supply pipe (22) are all connected to the combustion chamber (10).

5. The pre-treatment device for automobile painting organic waste gas according to claim 1, characterized in that: The filter screen (5) is located on the right side of the slag discharge pipe (6), the slag discharge pipe (6) is located on the lower side of the outer surface of the air inlet pipe (4), and the bottom end of the slag discharge pipe (6) is threadedly connected to a sealing cover.

6. The pre-treatment device for automobile painting organic waste gas according to claim 1, characterized in that: The mixing box (1) and the combustion box (2) are connected via a first gas pipeline (9), and the combustion box (2) and the purification box (3) are connected via a second gas pipeline (22).

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