Nitrogen oxide-containing waste gas treatment equipment

Abstract

The utility model discloses nitrogen oxide-containing waste gas treatment equipment which comprises a shell, a screen drum is rotatably arranged in the shell, a gas outlet is formed in the upper end of the shell, two side ends of the screen drum are sealed, a left mounting shaft of the screen drum is hollow and is communicated with an inner cavity of the screen drum, and the left end of the left mounting shaft is connected with a rotary joint. The screen drum is driven by an adjustable-speed motor arranged on the outer wall of the right side of the shell, an inner cavity of the shell is filled with an alkaline solution, and the lower end of the screen drum is immersed in the alkaline solution. According to the equipment, the screen drum with the lower end immersed in an alkaline solution is driven by the driving motor to rotate, liquid films can be formed in screen holes and on the inner and outer surfaces of the screen drum, waste gas and the liquid films are subjected to contact reaction, the contact area of the waste gas and the alkaline solution can be effectively increased through the treatment mode, and the reaction of nitric oxide and the alkaline solution is more sufficient and efficient; the waste gas treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of enameled wire waste gas treatment, in particular to a nitrogen oxide-containing waste gas treatment device. Background Art

[0002] In the production process of enameled wire, the catalytic combustion process is mainly used to treat the waste gas generated in the production process of enameled wire, especially the solvent and organic waste gas. Catalytic combustion is a highly efficient waste gas purification technology, which converts the organic matter in the waste gas into harmless carbon dioxide and water by oxidizing it under the action of a catalyst.

[0003] However, in the actual catalytic combustion process, nitrogen oxide gas will be generated (nitrogen oxides are very harmful to the human body and the environment). The existing solution is to directly discharge the waste gas containing nitrogen oxides into an alkaline solution through an aeration pipe for reaction to remove nitrogen oxides in the waste gas. The way the aeration pipe is passed will cause the waste gas to be in insufficient contact with the solution, resulting in low treatment efficiency. Therefore, this application provides a nitrogen oxide waste gas treatment device to meet the demand. Utility Model Content

[0004] The purpose of the present application is to provide a nitrogen oxide-containing waste gas treatment device to solve the technical problem of low efficiency in removing nitrogen oxides in existing waste gas.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a nitrogen oxide waste gas treatment device, comprising a shell with a sieve cylinder rotatably arranged inside and an air outlet at the upper end, both side ends of the sieve cylinder are sealed, the left mounting shaft of the sieve cylinder is hollow inside and communicates with the inner cavity of the sieve cylinder, the left end of the left mounting shaft is connected to a rotary joint, the sieve cylinder is driven by a speed regulating motor provided on the right outer wall of the shell, the sieve holes on the sieve cylinder are set to 75 to 95 meshes, the inner cavity of the shell is filled with an alkaline solution, and the lower end of the sieve cylinder is immersed in the alkaline solution.

[0006] As a preferred implementation manner in this embodiment, a plurality of hollow and cylindrical screens are arranged on the screen drum, and the plurality of screens are coaxially arranged from inside to outside, and the diameters gradually increase.

[0007] As a preferred implementation manner in this embodiment, the invention further includes an automatic liquid adding mechanism to automatically keep the liquid level in the shell within a reasonable range.

[0008] As a preferred implementation scheme in this embodiment, the automatic liquid adding mechanism includes a liquid storage tank installed on the outer wall of the shell and located above the alkaline liquid level, the lower end of the liquid storage tank is provided with a liquid injection tube connected to the inner cavity of the shell, the shell and the liquid storage tank are both provided with a guide wheel group, and the guide wheel group is provided with a pull rope, the left end of the pull rope passes through the shell and is fixedly connected to the weight block in the inner cavity of the shell, the lower end of the weight block is provided with a floating plate, the right end of the pull rope passes through the liquid storage tank and is connected to a conical blocking column, the outer wall of the conical blocking column is wrapped with a layer of elastic sealing gasket, and the lower end of the conical blocking column is sealed and plugged with the liquid inlet of the liquid injection tube.

[0009] As a preferred implementation mode in this embodiment, limiting rods are provided on the inner walls of the shell and the liquid storage tank, a limiting plate is fixed to the upper end of the conical blocking column, and the limiting rods respectively penetrate the corresponding weight-increasing blocks and the corresponding limiting plates.

[0010] As a preferred implementation in this embodiment, the sieve holes of the sieve cylinder are set to a mesh size of 80.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] The utility model has a reasonable structure. The device drives the sieve drum whose lower end is immersed in the alkaline solution to rotate through a driving motor, so that a liquid film can be formed in the sieve hole and on the inner and outer surfaces of the sieve drum. The waste gas contacts and reacts with the liquid film. This treatment method can effectively increase the contact area between the waste gas and the alkaline solution, making the reaction between the nitrogen oxides and the alkaline solution more sufficient and efficient, thereby accelerating the treatment efficiency of the waste gas.

[0013] In the utility model, a plurality of hollow cylindrical screens are arranged on the screen drum, which can treat the exhaust gas multiple times, further reduce the content of nitrogen oxides in the exhaust gas, and greatly improve the exhaust gas treatment effect.

[0014] In the utility model, an automatic liquid adding mechanism is provided to maintain the liquid level within a reasonable range, which is beneficial to speeding up the processing speed of the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the middle front view;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure of the automatic liquid adding mechanism;

[0019] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle screen cylinder from the front view.

[0020] In the figure: 1. Shell; 2. Screen drum; 3. Left mounting shaft; 4. Speed ​​regulating motor; 5. Rotary joint; 6. Air outlet; 7. Liquid storage tank; 8. Guide wheel assembly; 9. Pull rope; 10. Screen; 11. Weight block; 12. Float plate; 13. Conical blocking column; 14. Liquid injection pipe; 15. Limit rod; 16. Limit plate. DETAILED DESCRIPTION

[0021] 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.

[0022] Example: Reference Figure 1-2 The nitrogen oxide waste gas treatment equipment shown in the figure includes a shell 1 with a sieve drum 2 rotatably arranged inside and an air outlet 6 at the upper end. Both side ends of the sieve drum 2 are sealed. The left mounting shaft 3 of the sieve drum 2 is hollow inside and communicates with the inner cavity of the sieve drum 2. The left end of the left mounting shaft 3 is connected to a rotary joint 5. The sieve drum 2 is driven by a speed regulating motor 4 provided on the right outer wall of the shell 1. The sieve holes on the sieve drum 2 are set to 75 to 95 meshes. The inner cavity of the shell 1 is filled with an alkaline solution, and the lower end of the sieve drum 2 is immersed in the alkaline solution.

[0023] The rotary joint 5 is connected to the gas delivery pipeline. When working, the driving motor 4 drives the sieve drum to rotate, and a liquid film will be formed on the surface of the sieve hole and the sieve drum 2. The exhaust gas is transported to the inner cavity of the sieve drum 2 through the pump body and reacts with the liquid film. The nitrogen oxides in the exhaust gas react with the alkaline solution to generate sodium nitrogen oxide (the alkaline solution is sodium hydroxide solution with a concentration of 45%, which has a good treatment effect), so that the nitrogen oxides in the exhaust gas can be treated. The treated gas will be discharged outward through the sieve hole. The sieve drum is driven to rotate by the driving motor 4, and a liquid film can be formed in the sieve hole and on the inner and outer surfaces of the sieve drum 2. This treatment method can effectively increase the contact area between the exhaust gas and the alkaline solution, make the reaction of the nitrogen oxides and the alkaline solution more sufficient and efficient, and accelerate the treatment efficiency of the exhaust gas.

[0024] It should be noted that, first, the alkaline solution in the liquid storage tank 7 submerges one-third of the screen drum 2 to avoid excessive immersion of the alkaline solution, which will reduce the area of ​​the liquid film that can be formed, and is conducive to the rapid treatment of the exhaust gas. When the alkaline solution is too little, frequent liquid injection operations are required later, which is troublesome (as the solution evaporates or volatilizes, less and less, regular inspection and addition are required later); second, a speed regulating motor 4 is provided to adjust the rotation speed of the screen drum 2 according to the intake speed to match it; third, the screen holes are set to 75 to 95 meshes to avoid the screen holes being too large and the liquid film formed in the holes being too thin. Too thin liquid film is easily affected by external interference, such as motor vibration, which causes the liquid film to rupture prematurely, so that the exhaust gas is directly discharged without being treated. If the liquid film is too thick, it is not conducive to the timely discharge of the treated exhaust gas.

[0025] As a preferred implementation in this embodiment, Figure 4 As shown, a plurality of hollow cylindrical screens 10 are arranged on the screen drum 2. The plurality of screens 10 are coaxially arranged from inside to outside, and their diameters gradually increase.

[0026] The plurality of screens 10 are arranged from the inside to the outside, and the exhaust gas can be treated multiple times, thereby further reducing the content of nitrogen oxides in the exhaust gas and greatly improving the exhaust gas treatment effect.

[0027] As a preferred implementation in this embodiment, Figure 2 and Figure 3 As shown, the housing 1 also includes an automatic liquid adding mechanism to automatically keep the liquid level in the housing 1 within a reasonable range.

[0028] Maintaining the liquid level within a reasonable range can prevent excessive immersion of the alkaline solution, which will reduce the area of ​​the liquid film that can be formed. This is beneficial to the rapid treatment of waste gas and also avoids the need for frequent manual injection operations when there is too little alkaline solution, thus reducing trouble.

[0029] As a preferred implementation in this embodiment, Figure 3 As shown, the automatic liquid adding mechanism includes a liquid storage tank 7 installed on the outer wall of the shell 1 and located above the alkaline liquid level, the lower end of the liquid storage tank 7 is provided with a liquid injection tube 14 connected to the inner cavity of the shell 1, the shell 1 and the liquid storage tank 7 are provided with a guide wheel group 8, and the guide wheel group 8 is provided with a pull rope 9, the left end of the pull rope 9 passes through the shell 1 and is fixedly connected to the weight block 11 in the inner cavity of the shell 1, the lower end of the weight block 11 is provided with a floating plate 12, the right end of the pull rope 9 passes through the liquid storage tank 7 and is connected to a conical blocking column 13, the outer wall of the conical blocking column 13 is wrapped with a layer of elastic sealing pad, and the lower end of the conical blocking column 13 is sealed and plugged with the liquid inlet of the liquid injection tube 14.

[0030] When the solution inside the liquid storage tank 7 decreases, the float 12 and the weight block 11 begin to descend. At the same time, the pull rope 9 will drive the conical blocking column 13 to move upward, contacting the seal of the conical blocking column 13 on the liquid inlet of the injection tube 14. The alkaline solution in the liquid storage tank 7 enters the liquid storage tank 7 through the injection tube 14. The liquid level of the alkaline solution in the liquid storage tank 7 rises, and the float 12 drives the weight block 11 to move upward. At this time, the conical blocking column 13 moves downward under the action of its own gravity until it is plugged into the liquid inlet of the injection tube 14 to form a seal. At this time, the liquid height in the liquid storage tank 7 remains unchanged, and the balance of the liquid level in the liquid storage tank 7 can be automatically maintained.

[0031] It should be noted that, first, the injection pipe 14 is always located above the liquid level of the alkaline solution in the liquid storage tank 7; second, the pull rope 9, the floating plate 12, the weight block 11, the inner wall of the liquid storage tank 7 and the outer surface of the screen cylinder 2 are all provided with ZS-711 anti-corrosion coating, which can resist corrosion from the alkaline solution.

[0032] As a preferred implementation in this embodiment, Figure 3 As shown, limiting rods 15 are provided on the inner walls of the shell 1 and the liquid storage tank 7, and a limiting plate 16 is fixed to the upper end of the conical blocking column 13. The limiting rods 15 pass through the corresponding weight-increasing blocks 11 and the corresponding limiting plates 16 respectively.

[0033] The two limit rods 15 can ensure that the floating plate 12, the weight block 11 and the conical plugging column 13 maintain good stability during liquid level adjustment, avoiding shaking that may cause inaccurate liquid level adjustment or make the conical plugging column 13 unable to complete the connection with the injection tube 14.

[0034] As a preferred implementation in this embodiment, the sieve holes of the sieve drum 2 are set to 80 meshes. At this time, the thickness of the liquid film formed in the sieve holes is most moderate, so that the exhaust gas treatment effect is optimal.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A nitrogen oxide waste gas treatment device, characterized in that: The invention comprises a shell (1) in which a screen drum (2) is rotatably arranged and which has an air outlet (6) at the upper end. Both ends of the screen drum (2) are sealed. The left mounting shaft (3) of the screen drum (2) is hollow inside and communicates with the inner cavity of the screen drum (2). The left end of the left mounting shaft (3) is connected to a rotary joint (5). The screen drum (2) is driven by a speed regulating motor (4) arranged on the right outer wall of the shell (1). The screen holes on the screen drum (2) are arranged to have a mesh size of 75 to 95. The inner cavity of the shell (1) is filled with an alkaline solution, and the lower end of the screen drum (2) is immersed in the alkaline solution.

2. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: The screen cylinder (2) is provided with a plurality of hollow cylindrical screens (10), the plurality of screens (10) being coaxially arranged from the inside to the outside, and having gradually increasing diameters.

3. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: It also includes an automatic liquid adding mechanism, which automatically keeps the liquid level in the housing (1) within a reasonable range.

4. The nitrogen oxide waste gas treatment equipment according to claim 3, characterized in that: The automatic liquid adding mechanism comprises a liquid storage tank (7) mounted on the outer wall of the shell (1) and located above the alkaline liquid surface, the lower end of the liquid storage tank (7) is provided with a liquid injection pipe (14) communicating with the inner cavity of the shell (1), the shell (1) and the liquid storage tank (7) are both provided with a guide wheel group (8), and the guide wheel group (8) is provided with a pull rope (9), the left end of the pull rope (9) passes through the shell (1) and is fixedly connected to a weight block (11) in the inner cavity of the shell (1), the lower end of the weight block (11) is provided with a floating plate (12), the right end of the pull rope (9) passes through the liquid storage tank (7) and is connected to a conical blocking column (13), the outer wall of the conical blocking column (13) is wrapped with a layer of elastic sealing pad, and the lower end of the conical blocking column (13) is sealed and plugged with the liquid inlet of the liquid injection pipe (14).

5. The nitrogen oxide waste gas treatment equipment according to claim 4, characterized in that: Limiting rods (15) are provided on the inner walls of the housing (1) and the liquid storage tank (7), a limiting plate (16) is fixed to the upper end of the conical blocking column (13), and the limiting rods (15) respectively penetrate the corresponding weight-increasing block (11) and the corresponding limiting plate (16).

6. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: The sieve holes of the sieve cylinder (2) are set to 80 meshes.

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