Industrial coating waste gas treatment device

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to an industrial coating waste gas treatment device, which is characterized in that a VOC (volatile organic compound) organic solvent and water are fed into a dosing tank according to a specified proportion, and a mixed solution is sucked into the top of a spray tower body from a liquid discharge pipe under a negative pressure state and is continuously sprayed out along nozzle ends of a plurality of groups of blanking nozzles at the bottom of a U-shaped branch pipe; in the process, the rotational flow plates are used for separating solid particles, fog drops and other impurities in the liquid and changing the flowing direction and speed of the fluid, and as the rotational surfaces of the first rotational flow plate and the second rotational flow plate are opposite, the retention time of the internal fluid in the spray tower can be prolonged, so that the purification effect on the waste gas is improved; the activated carbon adsorption plate is used for efficiently adsorbing toxic stimulating gases such as methylbenzene and xylene in the waste gas through built-in micropores; by means of the method, the organic waste gas treatment efficiency can reach 99% or above, and pollution to the environment is reduced to the maximum extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and in particular relates to an industrial coating waste gas treatment device. Background Art

[0002] The main VOCs in automobile painting production are generated in the spraying process of mid-coat and topcoat. About 50% of automobile painting energy consumption is also consumed in the spraying process of mid-coat and topcoat. The varnish project is the main source of VOCs, but the end-of-line treatment measure of the varnish spraying process is the Venturi treatment system built into the equipment. According to the relevant provisions of environmental impact assessment and regulations, improvements need to be made.

[0003] After searching, the publication number: CN207951107U announced an industrial coating waste gas and waste residue recovery device system. In the utility model, the coating waste gas and residue treatment device system treats the waste gas through chemical agents, the generated waste residue can be recovered, and the agents can be recycled. The coating waste gas and residue treatment device system has a waste residue recovery rate of 90%, and a VOC (organic solvent) recovery rate of more than 80%. However, this device has poor filtering effect on irritating and toxic gases such as toluene and xylene in the waste gas through multiple filtrations. It only reacts with the waste gas by adding chemicals, and cannot ensure the sufficiency of hardening, thereby increasing pollution to the environment.

[0004] Therefore, an industrial coating waste gas treatment device is designed to solve the above problems. Utility Model Content

[0005] To solve the problems raised in the above background technology. The utility model provides an industrial coating waste gas treatment device. When the device is in use, the coating waste gas is introduced from the bottom of the spray tank, and the VOC organic solvent and water can be added into the dosing box in a specified proportion with the waste gas, and then the outer metering pump is started. Under negative pressure, the mixed liquid is sucked from the discharge pipe to the top of the spray tower body, and continuously sprayed out along the nozzle ends of multiple groups of feed nozzles at the bottom of the U-shaped branch pipe. In this process, the swirl plate is used to separate solid particles, droplets and other impurities in the liquid, and change the flow direction and speed of the fluid. Since the swirl surfaces of the first swirl plate and the second swirl plate are opposite, the internal fluid can prolong the retention time inside the spray tower, thereby improving the purification effect of the waste gas.

[0006] The initially purified waste gas is filtered along the filter plate on the inner side of the top plate to remove the residual particulate matter in the waste gas. Then the outer exhaust pump is started, and the purified waste gas enters the deodorization box from the top along the air duct. The waste gas passes through three groups of activated carbon adsorption plates arranged up and down in the interior. The activated carbon adsorption plates efficiently adsorb toxic and irritating gases such as toluene and xylene in the waste gas through built-in micropores. After the equipment is shut down, the pull-out plate can be pulled out to complete the replacement of the activated carbon adsorption plate, which is easy to operate. The deodorized gas is sent to the RTO combustion furnace through a booster pump. In the presence of fuel to assist combustion, the organic waste gas is burned at 700-800℃, and the organic matter is converted into carbon dioxide and water. The furnace body adopts a heat storage structure, and the heat of combustion is used to heat the organic waste gas to be treated. The waste gas after incineration is then discharged into the air through the exhaust pipe. The efficiency of this method in treating organic waste gas can reach more than 99%, greatly reducing pollution to the environment.

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an industrial coating waste gas treatment device, comprising a circulating waste gas treatment mechanism, wherein the circulating waste gas treatment mechanism comprises a spray tank body, a dosing box, a metering pump, a drain pipe, a deodorization box and an RTO combustion furnace, the discharge end of the dosing box is fixedly connected to the input end of the metering pump, the bottom of the drain pipe is fixedly connected to the output end of the metering pump, the top inner wall of the spray tank body is welded and fixedly connected to the outer wall of the drain pipe, the deodorization box is arranged on the outside of the spray tank body, and the air inlet end of the RTO combustion furnace is fixedly connected to the bottom side of the deodorization box through a pipe.

[0008] As a preferred industrial coating waste gas treatment device of the utility model, the interior of the spray tank body is also provided with a support column, a first cyclone plate, a second cyclone plate, a top plate and a filter plate, the bottom of the support column is fixedly connected to the inner surface of the spray tank body, the first cyclone plate is fixedly connected to the surface of the support column, the second cyclone plate is arranged on the opposite side of the first cyclone plate, the top plate is fixedly connected to the top of the support column, and the filter plate is fixedly connected to the inner side of the top plate.

[0009] As a preferred industrial coating waste gas treatment device of the utility model, a U-shaped branch pipe and a discharge nozzle are also provided on the outer side of the top of the drain pipe, the middle part of the U-shaped branch pipe is fixedly connected to the discharge end of the drain pipe, and the discharge nozzles are arranged at equal intervals on both sides of the bottom of the U-shaped branch pipe.

[0010] As a preferred industrial coating waste gas treatment device of the utility model, an air duct, an air suction pump and an air intake pipe are also provided on the top of the spray tank body, the output end of the air duct is fixedly connected to the input end of the air suction pump, and the air intake pipe passes through the middle of the top end of the deodorization box and is fixedly connected to the inner wall surface of the deodorization box.

[0011] As a preferred industrial coating waste gas treatment device of the utility model, a pull-out plate and an activated carbon adsorption plate are also provided inside the deodorization box, the inner side of the pull-out plate is threadedly connected to one end of the activated carbon adsorption plate, and the activated carbon adsorption plate is slidably sleeved inside the deodorization box.

[0012] As a preferred embodiment of the industrial coating waste gas treatment device of the utility model, a booster pump is also provided on the outer side of the bottom of the deodorization box.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, VOC organic solvent and water are put into the dosing box in a specified proportion. Under negative pressure, the mixed liquid is sucked from the discharge pipe to the top of the spray tower body, and continuously sprayed out along the nozzle ends of multiple groups of feed nozzles at the bottom of the U-shaped branch pipe. In this process, the swirl plate is used to remove solid particles, droplets and other impurities in the liquid, and change the flow direction and speed of the fluid. Since the swirl surfaces of the first swirl plate and the second swirl plate are opposite, the internal fluid can prolong the retention time in the spray tower, thereby improving the purification effect of the exhaust gas.

[0015] 2. In the utility model, the purified waste gas enters the deodorization box from the top along the air duct, and the waste gas passes through three groups of activated carbon adsorption plates arranged up and down in the interior in turn. The activated carbon adsorption plates complete the efficient adsorption of toxic and irritating gases such as toluene and xylene in the waste gas through the built-in micropores; the deodorized gas is sent to the RTO combustion furnace through a booster pump, and in the presence of fuel to assist combustion, the organic waste gas is burned at 700-800°C, and the organic matter is converted into carbon dioxide and water. The furnace body adopts a heat storage structure, and the heat of combustion is used to heat the organic waste gas to be treated. The waste gas after incineration is then discharged into the air through the exhaust pipe. The efficiency of treating organic waste gas by this method can reach more than 99%, greatly reducing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a side view of the circulating exhaust gas treatment mechanism in the utility model;

[0019] Figure 3 It is a cross-sectional view of the interior of the spray tank body in the utility model;

[0020] Figure 4This is a distribution diagram of the U-shaped branch pipe and the feed nozzle in the utility model;

[0021] Figure 5 It is a distribution diagram of the activated carbon adsorption plate in the utility model;

[0022] In the figure:

[0023] 1. Circulating exhaust gas treatment mechanism; 11. Spray tank body; 12. Dosing box; 13. Metering pump; 14. Drain pipe; 15. Deodorization box; 16. RTO combustion furnace; 2. Support column; 3. First swirl plate; 4. Second swirl plate; 5. Top plate; 6. Filter plate; 7. U-shaped branch pipe; 8. Feeding nozzle; 9. Air guide pipe; 10. Vacuum pump; 20. Inlet pipe; 21. Pull-out plate; 22. Activated carbon adsorption plate; 23. Booster pump. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown:

[0026] An industrial coating waste gas treatment device, as disclosed in CN207951107U, is a coating waste gas residue treatment device system that treats waste gas through chemical agents, the generated waste residue can be recovered, and the agents can be recycled. The coating waste gas residue treatment device system has a waste residue recovery rate of 90%, and a VOC organic solvent recovery rate of more than 80%. However, this device has poor filtering effect on irritating and toxic gases such as toluene and xylene in the waste gas through multiple filtrations. It reacts with the waste gas only by adding chemicals, and cannot ensure the sufficiency of the reaction, thereby increasing pollution to the environment. On this basis, a circulating waste gas treatment mechanism 1 is added.

[0027] like Figure 2 , Figure 3 and Figure 4 As shown:

[0028] In an optional embodiment: the circulating exhaust gas treatment mechanism 1 includes a spray tank body 11, a dosing box 12, a metering pump 13, a drain pipe 14, a deodorizing box 15 and an RTO combustion furnace 16, the discharge end of the dosing box 12 is fixedly connected to the input end of the metering pump 13, the bottom of the drain pipe 14 is fixedly connected to the output end of the metering pump 13, the top inner wall of the spray tank body 11 is fixedly connected to the outer wall of the drain pipe 14 by welding, the deodorizing box 15 is arranged on the outside of the spray tank body 11, and the RTO combustion furnace 16 is fixedly connected to the top inner wall of the spray tank body 11 and the outer wall of the drain pipe 14. The air inlet end of 6 is fixedly connected to the bottom side of the deodorizing box 15 through a pipeline. The interior of the spray tank body 11 is also provided with a support column 2, a first swirl plate 3, a second swirl plate 4, a top plate 5 and a filter plate 6. The bottom of the support column 2 is fixedly connected to the inner surface of the spray tank body 11, the first swirl plate 3 is fixedly connected to the surface of the support column 2, the second swirl plate 4 is arranged on the opposite side of the first swirl plate 3, the top plate 5 is fixedly connected to the top of the support column 2, and the filter plate 6 is fixedly connected to the inner side of the top plate 5.

[0029] In this embodiment: when the device is in use, the coating exhaust gas is introduced from the bottom of the spray tank, and the VOC organic solvent and water can be added into the dosing box 12 in a specified proportion with the exhaust gas, and then the outer metering pump 13 is started. Under negative pressure, the mixed liquid is sucked into the top of the spray tower body from the discharge pipe 14, and continuously sprayed out along the nozzle ends of the multiple groups of feed nozzles 8 at the bottom of the U-shaped branch pipe 7. In this process, the swirl plate is used to separate solid particles, droplets and other impurities in the liquid, and change the flow direction and speed of the fluid. Since the swirl surfaces of the first swirl plate 3 and the second swirl plate 4 are opposite, the internal fluid can prolong the retention time inside the spray tower, thereby improving the purification effect of the exhaust gas.

[0030] More specifically:

[0031] like Figure 1 , Figure 2 and Figure 5 As shown:

[0032] In an optional embodiment: a U-shaped branch pipe 7 and a feeding nozzle 8 are also provided on the outer side of the top of the drain pipe 14, the middle part of the U-shaped branch pipe 7 is fixedly connected to the discharge end of the drain pipe 14, and the feeding nozzles 8 are arranged at equal intervals on both sides of the bottom of the U-shaped branch pipe 7; an air guide pipe 9, an air pump 10 and an air intake pipe 20 are also provided on the top of the spray tank body 11; the output end of the air guide pipe 9 is fixedly connected to the input end of the air pump 10; the air intake pipe 20 passes through the middle part of the top of the deodorization box 15 and is fixedly connected to the inner wall surface of the deodorization box 15; a pull-out plate 21 and an activated carbon adsorption plate 22 are also provided inside the deodorization box 15; the inner side of the pull-out plate 21 is threadedly connected to one end of the activated carbon adsorption plate 22; the activated carbon adsorption plate 22 is slidably sleeved inside the deodorization box 15; a booster pump 23 is also provided on the outer side of the bottom of the deodorization box 15.

[0033] In this embodiment: the initially purified waste gas is filtered along the filter plate 6 on the inner side of the top plate 5 to filter the residual particulate matter in the waste gas, and then the outer exhaust pump 10 is started, and the purified waste gas enters the deodorization box 15 from the top along the air guide pipe 9, and the waste gas passes through three groups of activated carbon adsorption plates 22 arranged up and down in the interior, and the activated carbon adsorption plate 22 completes the efficient adsorption of toxic and irritating gases such as toluene and xylene in the waste gas through the built-in micropores; after the equipment is shut down, the pull-out plate 21 can be pulled out to complete the replacement of the activated carbon adsorption plate 22, which is easy to operate; the deodorized gas is sent to the RTO combustion furnace 16 through the booster pump 23, and in the case of fuel combustion, the organic waste gas is burned at 700-800°C, and the organic matter is converted into carbon dioxide and water. The furnace body adopts a heat storage structure, and the heat of combustion is used to heat the organic waste gas to be treated. The waste gas after incineration is then discharged into the air through the exhaust pipe. The efficiency of treating organic waste gas by this method can reach more than 99%, greatly reducing the pollution to the environment.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An industrial coating waste gas treatment device, comprising a circulating waste gas treatment mechanism (1), characterized in that: The circulating waste gas treatment mechanism (1) comprises a spray tank body (11), a dosing box (12), a metering pump (13), a drain pipe (14), a deodorizing box (15) and an RTO combustion furnace (16); the discharge end of the dosing box (12) is fixedly connected to the input end of the metering pump (13); the bottom of the drain pipe (14) is fixedly connected to the output end of the metering pump (13); the top inner wall of the spray tank body (11) is fixedly connected to the outer wall of the drain pipe (14) by welding; the deodorizing box (15) is arranged on the outside of the spray tank body (11); and the air inlet end of the RTO combustion furnace (16) is fixedly connected to one side of the bottom of the deodorizing box (15) through a pipeline.

2. The industrial coating waste gas treatment device according to claim 1, characterized in that: The spray tank body (11) is further provided with a support column (2), a first cyclone plate (3), a second cyclone plate (4), a top plate (5) and a filter plate (6); the bottom of the support column (2) is fixedly connected to the inner surface of the spray tank body (11); the first cyclone plate (3) is fixedly connected to the surface of the support column (2); the second cyclone plate (4) is arranged on the opposite side of the first cyclone plate (3); the top plate (5) is fixedly connected to the top of the support column (2); and the filter plate (6) is fixedly connected to the inner side of the top plate (5).

3. The industrial coating waste gas treatment device according to claim 1, characterized in that: A U-shaped branch pipe (7) and a feed nozzle (8) are also provided on the outer side of the top of the liquid discharge pipe (14); the middle part of the U-shaped branch pipe (7) is fixedly connected to the discharge end of the liquid discharge pipe (14); and the feed nozzles (8) are arranged at equal intervals on both sides of the bottom of the U-shaped branch pipe (7).

4. The industrial coating waste gas treatment device according to claim 1, characterized in that: An air guide pipe (9), an air pump (10) and an air intake pipe (20) are also provided on the top of the spray tank body (11); the output end of the air guide pipe (9) is fixedly connected to the input end of the air pump (10); and the air intake pipe (20) passes through the middle of the top end of the deodorizing box (15) and is fixedly connected to the inner wall surface of the deodorizing box (15).

5. The industrial coating waste gas treatment device according to claim 4, characterized in that: The deodorizing box (15) is further provided with a pull-out plate (21) and an activated carbon adsorption plate (22), the inner side of the pull-out plate (21) is threadedly connected to one end of the activated carbon adsorption plate (22), and the activated carbon adsorption plate (22) is slidably sleeved inside the deodorizing box (15).

6. The industrial coating waste gas treatment device according to claim 5, characterized in that: A booster pump (23) is also provided on the outer side of the bottom of the deodorizing box (15).

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