Nitrogen oxide waste gas treatment equipment

Abstract

The utility model relates to the field of waste gas treatment equipment, and discloses a workpiece clamping device for metal electroplating machining, which comprises a spray tower for treating nitrogen oxide waste gas and a base fixedly mounted at the bottom of the spray tower, a waste gas inlet pipe is fixedly mounted on the left side of the spray tower, and an exhaust pipe is fixedly mounted on the top of the spray tower. A liquid storage cavity is formed in the base, a nitrogen oxide absorbent solution is stored in the liquid storage cavity, a conveying pump is fixedly installed on the outer wall of the right side of the base, a liquid suction pipe is fixedly installed at the suction end of the conveying pump, and the end, away from the conveying pump, of the liquid suction pipe extends into the liquid storage cavity; and a plurality of liquid discharge branch pipes are fixedly mounted on the liquid discharge header pipe at equal intervals. The nitrogen oxide waste gas denitrification device has the following advantages and effects that nitrogen oxide waste gas can be subjected to comprehensive and effective denitrification treatment, a nitrogen oxide absorbent solution can be fully utilized, and resource waste is reduced.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment equipment, and particularly relates to a nitrogen oxide waste gas treatment equipment. Background Art

[0002] Waste gas treatment is an important environmental protection technology aimed at reducing the impact of waste gas generated in industrial production processes on the environment and human health. Some industrial waste gases contain nitrogen oxides. A relatively large amount of nitrogen oxides discharged into the atmosphere will have harmful effects on humans, animals, plants, and other substances, polluting the environment. Therefore, when industrial waste gases are discharged, a nitrogen oxide waste gas treatment equipment is required. After retrieval, the patent document with the authorization announcement number CN213885673U discloses a nitrogen oxide waste gas treatment tower, including a housing. An primary treatment cavity and a secondary treatment cavity are installed inside the housing. Conduits are installed above the interiors of the primary treatment cavity and the secondary treatment cavity. One end of each conduit is provided with an atomizing nozzle. A connecting plate is installed at the bottom of the atomizing nozzle. Atomizing spray holes are formed at the bottom of the connecting plate. By providing atomizing nozzles inside both the primary treatment cavity and the secondary treatment cavity, and the atomizing nozzles are circular, the area of fog spraying is increased. Moreover, the atomizing spray holes are in a protruding strip structure, and the distance between adjacent two is equal to their own width, so that the fog can be dispersed and sprayed, reacting more fully with the waste gas. Moreover, multi-stage treatment can improve the working efficiency of waste gas treatment, and at the same time reduce the floor area of the equipment, having the characteristics of simple structure and convenient maintenance.

[0003] The above-mentioned related solutions are found to still have at least the following deficiencies in actual use: During the denitrification treatment of nitrogen oxide waste gas, since there is still some solution in the nitrogen oxide absorbent solution sprayed out from the atomizing nozzle that does not come into contact with the nitrogen oxides in the waste gas for neutralization reaction, the nitrogen oxide absorbent solution cannot be fully utilized, resulting in waste of resources. Therefore, we propose a nitrogen oxide waste gas treatment equipment to solve the above problems. Utility Model Content

[0004] The purpose of this application is to provide a nitrogen oxide waste gas treatment equipment, which has the effect of being able to comprehensively and effectively denitrify nitrogen oxide waste gas and being able to fully utilize the nitrogen oxide absorbent solution, reducing waste of resources.

[0005] The above technical object of the present application is achieved through the following technical solutions: A nitrogen oxide waste gas treatment device includes a spray tower for treating nitrogen oxide waste gas and a base fixedly installed at the bottom of the spray tower. An exhaust gas inlet pipe is fixedly installed on the left side of the spray tower, and an exhaust pipe is fixedly installed on the top of the spray tower. A liquid storage cavity is opened in the base, and a nitrogen oxide absorbent solution is stored in the liquid storage cavity. A delivery pump is fixedly installed on the right outer wall of the base. The suction end of the delivery pump is fixedly installed with a liquid suction pipe, and the end of the liquid suction pipe away from the delivery pump extends into the liquid storage cavity. The discharge end of the delivery pump is fixedly installed with a main liquid discharge pipe, and a plurality of liquid discharge branch pipes are fixedly installed on the main liquid discharge pipe at equal intervals. The left ends of the plurality of liquid discharge branch pipes all extend into the spray tower, and a plurality of atomizing nozzles are fixedly connected to the plurality of liquid discharge branch pipes at equal intervals. An eliminator is fixedly installed in the spray tower above the liquid discharge branch pipes. A gas distribution assembly is arranged in the spray tower below the exhaust gas inlet pipe. One end of the exhaust gas inlet pipe extends into the spray tower and is connected to the gas distribution assembly. The gas distribution assembly is used to evenly diffuse the air nitrogen oxide waste in the spray tower.

[0006] The further setting of the present application is: The gas distribution assembly includes a hollow gas distribution disc, a plurality of support columns, a plurality of vertical gas distribution pipes, a plurality of L-shaped gas distribution pipes, and a plurality of air outlet heads. The hollow gas distribution disc is arranged in the spray tower and below the exhaust gas inlet pipe. The end of the exhaust gas inlet pipe in the spray tower extends into the hollow gas distribution disc. A plurality of support columns are all fixedly installed on the outer side wall of the hollow gas distribution disc and are evenly distributed in an annular shape at equal intervals. The ends of the plurality of support columns away from the hollow gas distribution disc are all fixedly connected to the inner side wall of the spray tower. A plurality of vertical gas distribution pipes are all fixedly installed at the bottom of the hollow gas distribution disc and are evenly distributed, and the plurality of vertical gas distribution pipes are all communicated with the inside of the hollow gas distribution disc. A plurality of L-shaped gas distribution pipes are all fixedly installed at the outer edge of the bottom of the hollow gas distribution disc and are evenly distributed in an annular shape at equal intervals, and the plurality of L-shaped gas distribution pipes are all communicated with the inside of the hollow gas distribution disc. A plurality of air outlet heads are fixedly connected to the horizontal ends of the plurality of L-shaped gas distribution pipes and are evenly distributed.

[0007] The further setting of the present application is: The top surface of the hollow gas distribution disc is a convex structure upward.

[0008] The further setting of the present application is: A dust filter screen is fixedly installed in the spray tower, and the dust filter screen is located between the exhaust gas inlet pipe and the liquid discharge branch pipes.

[0009] The further setting of the present application is: The dust filter screen is a convex arc surface structure upward.

[0010] The further setting of the present application is: A sewage discharge pipe is installed at the left bottom of the spray tower, and a sewage discharge valve is fixedly installed on the sewage discharge pipe.

[0011] The further setting of the present application is: An observation port is opened on the front inner wall of the liquid storage cavity, and an observation mirror is fixedly installed in the observation port.

[0012] A further setting of the present application is that a liquid adding pipe communicated with the liquid storage cavity is fixedly installed on the front side wall of the base, and an end cover is threadedly installed at the top end of the liquid adding pipe.

[0013] The present application includes at least one of the following beneficial technical effects:

[0014] 1. By operating the transfer pump, the present application can pump the nitrogen oxide absorbent solution in the liquid storage cavity, so that the nitrogen oxide absorbent solution is sprayed downward in a mist form from a plurality of atomizing nozzles and diffuses in the spray tower. By using the combination of nitrogen oxides and the misty nitrogen oxide absorbent solution to generate a neutralization reaction, the nitrogen oxide waste gas can be effectively denitrified in front.

[0015] 2. By using the air distribution assembly composed of a hollow air distribution plate, a plurality of support columns, a plurality of vertical air distribution pipes, a plurality of L-shaped air distribution pipes and a plurality of air outlet heads, the present application can disperse the nitrogen oxide waste gas entering the interior of the spray tower to first contact the used nitrogen oxide absorbent solution stored and collected on the inner wall of the bottom of the spray tower for neutralization reaction and denitrification treatment, and then the waste gas flows from bottom to top, and the misty nitrogen oxide absorbent solution sprayed from a plurality of atomizing nozzles is used to continue denitrifying the waste gas, so as to make full use of the nitrogen oxide absorbent solution and reduce the waste of resources.

[0016] 3. By using the filter dust net, the present application can block the small dust particles carried in the waste gas, avoid the small dust particles rising in the interior space of the spray tower along with the waste gas, and by setting the filter dust net as an upwardly convex arc surface structure, not only can the blockage of the mesh holes on the filter dust net by small dust particles be effectively reduced, but also the nitrogen oxide waste gas can be more comprehensively and dispersed when passing through the mesh holes on the filter dust net.

[0017] 4. By using the demister, the present application can be used to intercept water mist and water vapor, and effectively reduce the discharge of water mist and water vapor into the atmosphere through the exhaust pipe. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of this embodiment.

[0019] Figure 2 It is a front view sectional structural schematic diagram of this embodiment.

[0020] Figure 3 It is Figure 2 The enlarged structural schematic diagram of part A in

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the air distribution assembly.

[0022] In the figure, 1 is a spray tower; 2 is a base; 3 is an exhaust gas inlet pipe; 4 is an exhaust pipe; 5 is a liquid storage chamber; 6 is a delivery pump; 7 is a liquid suction pipe; 8 is a total liquid discharge pipe; 9 is a liquid discharge branch pipe; 10 is an atomizing nozzle; 11 is a demister; 12 is a hollow air distribution plate; 13 is a support column; 14 is a vertical air distribution pipe; 15 is an L-shaped air distribution pipe; 16 is an air outlet head; 17 is a dust filter screen; 18 is a sewage discharge pipe; 19 is a sewage discharge valve; 20 is an observation mirror; 21 is a liquid adding pipe; 22 is an end cover. Detailed implementation manners

[0023] The technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0024] See Figure 1 , Figure 2 , Figure 3 and Figure 4, this application provides a nitrogen oxide waste gas treatment device, including a spray tower 1 for treating nitrogen oxide waste gas and a base 2 fixedly installed at the bottom of the spray tower 1. An exhaust gas inlet pipe 3 is fixedly installed on the left side of the spray tower 1, and the exhaust gas inlet pipe 3 is used to transport the generated nitrogen oxide waste gas into the spray tower 1. An exhaust pipe 4 is fixedly installed at the top of the spray tower 1, and the exhaust pipe 4 is used to discharge the denitrified and purified waste gas. A liquid storage cavity 5 is formed in the base 2, and a nitrogen oxide absorbent solution is stored in the liquid storage cavity 5. The nitrogen oxide absorbent solution can be any one of sulfuric acid, concentrated nitric acid, sodium hydroxide solution, and sodium carbonate solution. Among them, the method of using sulfuric acid and concentrated nitric acid to remove nitrogen oxides from waste gas is acid absorption denitrification, and the method of using sodium hydroxide solution and sodium carbonate solution to remove nitrogen oxides from waste gas is alkali absorption denitrification. Acid absorption denitrification and alkali absorption denitrification can be selected according to specific actual situations. A delivery pump 6 is fixedly installed on the right outer wall of the base 2. The suction end of the delivery pump 6 is fixedly installed with a liquid suction pipe 7, and one end of the liquid suction pipe 7 away from the delivery pump 6 extends into the liquid storage cavity 5. The discharge end of the delivery pump 6 is fixedly installed with a main liquid discharge pipe 8, and a plurality of liquid discharge branch pipes 9 are fixedly installed on the main liquid discharge pipe 8 at equal intervals. The left ends of the plurality of liquid discharge branch pipes 9 all extend into the spray tower 1, and a plurality of atomizing nozzles 10 are fixedly connected to the plurality of liquid discharge branch pipes 9 at equal intervals. The delivery pump 6 is used to pump the nitrogen oxide absorbent solution in the liquid storage cavity 5, so that the nitrogen oxide absorbent solution can be atomized and ejected from the plurality of atomizing nozzles 10 to contact the nitrogen oxides in the waste gas for a neutralization reaction to denitrify. By setting a plurality of liquid discharge branch pipes 9, the comprehensiveness of denitrifying and purifying the nitrogen oxides in the waste gas can be improved. An eliminator 11 is fixedly installed in the spray tower 1 above the liquid discharge branch pipes 9. The eliminator 11 is used to intercept water mist and water vapor, and can effectively reduce the discharge of water mist and water vapor into the atmosphere through the exhaust pipe 4. A gas distribution component is arranged in the spray tower 1 below the exhaust gas inlet pipe 3. One end of the exhaust gas inlet pipe 3 extends into the spray tower 1 and is connected to the gas distribution component. The gas distribution component is used to evenly diffuse the air nitrogen oxide waste in the spray tower 1. The gas distribution component includes a hollow gas distribution disk 12, a plurality of support columns 13, a plurality of vertical gas pipes 14, a plurality of L-shaped gas pipes 15, and a plurality of air outlet heads 16. The hollow gas distribution disk 12 is arranged in the spray tower 1 and below the exhaust gas inlet pipe 3. The end of the exhaust gas inlet pipe 3 in the spray tower 1 extends into the hollow gas distribution disk 12. A plurality of support columns 13 are all fixedly installed on the outer side wall of the hollow gas distribution disk 12 and are distributed in an equidistant annular shape. One end of the plurality of support columns 13 away from the hollow gas distribution disk 12 is fixedly connected to the inner side wall of the spray tower 1. A plurality of vertical gas pipes 14 are all fixedly installed at the bottom of the hollow gas distribution disk 12 and are evenly distributed, and a plurality of vertical gas pipes 14 are all communicated with the inside of the hollow gas distribution disk 12. A plurality of L-shaped gas pipes 15 are all fixedly installed at the outer edge of the bottom of the hollow gas distribution disk 12 and are distributed in an equidistant annular shape, and a plurality of L-shaped gas pipes 15 are all communicated with the inside of the hollow gas distribution disk 12.Multiple air outlet heads 16 are fixedly connected to the horizontal ends of multiple L-shaped air distribution pipes 15 and are evenly distributed. When the nitrogen oxide waste gas is transported to the inside of the spray tower 1 through the waste gas transport pipe, the nitrogen oxide waste gas can be discharged dispersedly from multiple vertical air distribution pipes 14 and multiple air outlet heads 16. Furthermore, the nitrogen oxide waste gas entering the inside of the spray tower 1 can first contact the used nitrogen oxide absorbent solution stored and collected on the inner wall of the bottom of the spray tower 1 for neutralization reaction denitrification treatment, thereby making full use of the nitrogen oxide absorbent solution and reducing the waste of resources.

[0025] In this embodiment, the top surface of the hollow air distribution plate 12 is a convex structure upward, which can ensure that the nitrogen oxide absorbent solution will not accumulate on the upper surface of the hollow air distribution plate 12.

[0026] In this embodiment, a dust filter net 17 is fixedly installed inside the spray tower 1. The dust filter net 17 is located between the waste gas inlet pipe 3 and the liquid discharge branch pipe 9 and is used to block the small dust particles carried in the waste gas to prevent the small dust particles from rising in the internal space of the spray tower 1 along with the waste gas.

[0027] In this embodiment, the dust filter net 17 is a convex arc surface structure. It can not only effectively reduce the blockage of the mesh holes on the dust filter net 17 by small dust particles, but also make the nitrogen oxide waste gas spread more comprehensively and dispersedly when rising through the mesh holes on the dust filter net 17.

[0028] In this embodiment, a sewage discharge pipe 18 is installed at the left bottom of the spray tower 1, and a sewage discharge valve 19 is fixedly installed on the sewage discharge pipe 18 for discharging the waste liquid stored on the inner wall of the bottom of the spray tower 1.

[0029] In this embodiment, an observation port is opened on the front inner wall of the liquid storage cavity 5, and an observation mirror 20 is fixedly installed in the observation port, which can conveniently observe and know the liquid level height inside the liquid storage cavity 5. It should be noted that the observation mirror 20 adopts an existing observation mirror with good corrosion resistance.

[0030] In this embodiment, a liquid adding pipe 21 communicating with the liquid storage cavity 5 is fixedly installed on the front side wall of the base 2, and a end cover 22 is threadedly installed at the top end of the liquid adding pipe 21, which is convenient for filling the nitrogen oxide absorbent solution into the liquid storage cavity 5.

[0031] In this embodiment, it should be noted that a detachable maintenance door (not drawn in this article) is provided on the spray tower 1 above the dust filter net 17, which is convenient for cleaning the upper surface of the dust filter net 17.

[0032] With the above structure, when a nitrogen oxide waste gas treatment device provided by the present application is in use, it can comprehensively and effectively denitrify nitrogen oxide waste gas, and can make full use of the nitrogen oxide absorbent solution to reduce resource waste. During specific operation, the nitrogen oxide waste gas first enters the hollow air distribution plate 12 through the waste gas inlet pipe 3, and then is discharged from a plurality of vertical air distribution pipes 14 and a plurality of air outlet heads 16 respectively, so that the nitrogen oxide waste gas is evenly diffused and flows upward through the filter holes on the dust filter net 17. By controlling the operation of the transfer pump 6, the nitrogen oxide absorbent solution in the liquid storage chamber 5 can be pumped, so that the nitrogen oxide absorbent solution is sprayed downward in a mist form from a plurality of atomizing nozzles 10 and diffused in the spray tower 1. By using the combination of nitrogen oxide and the mist-like nitrogen oxide absorbent solution to generate a neutralization reaction, the nitrogen oxide waste gas can be denitrified. The denitrified waste gas passes through the demister 11 and is discharged from the exhaust pipe 4. The demister 11 can intercept the water vapor and water mist carried in the waste gas, and can effectively reduce the discharge of water vapor and water mist through the exhaust pipe 4. During the continuous treatment of the nitrogen oxide waste gas, the mist-like nitrogen oxide absorbent solution sprayed from a plurality of atomizing nozzles 10 will fall and accumulate on the bottom inner wall of the spray tower 1. At this time, as the accumulated nitrogen oxide absorbent solution increases, the tops of a plurality of vertical air distribution pipes 14 and a plurality of air outlet heads 16 can be immersed in the nitrogen oxide absorbent solution. Then, as the nitrogen oxide waste gas continuously enters the interior of the spray tower 1 through the waste gas inlet pipe 3, the nitrogen oxide waste gas can be dispersed and first contact the used nitrogen oxide absorbent solution stored and collected on the bottom inner wall of the spray tower 1 for neutralization reaction denitrification treatment, and then the waste gas flows upward, and the mist-like nitrogen oxide absorbent solution sprayed from a plurality of atomizing nozzles 10 is used to continue denitrifying the waste gas, thereby making full use of the nitrogen oxide absorbent solution and reducing the waste of resources.

Claims

1. A nitrogen oxide waste gas treatment device, characterized in that: The invention comprises a spray tower (1) for treating nitrogen oxide waste gas and a base (2) fixedly mounted on the bottom of the spray tower (1), wherein an exhaust gas inlet pipe (3) is fixedly mounted on the left side of the spray tower (1), an exhaust pipe (4) is fixedly mounted on the top of the spray tower (1), a liquid storage chamber (5) is provided in the base (2), and a nitrogen oxide absorbent solution is stored in the liquid storage chamber (5), a delivery pump (6) is fixedly mounted on the right outer wall of the base (2), a liquid suction pipe (7) is fixedly mounted on the suction end of the delivery pump (6), an end of the liquid suction pipe (7) away from the delivery pump (6) extends into the liquid storage chamber (5), and a discharge end of the delivery pump (6) is fixedly mounted on the discharge end of the delivery pump (6). A main drainage pipe (8) is installed, and a plurality of drainage branch pipes (9) are fixedly installed on the main drainage pipe (8) at equal intervals. The left ends of the plurality of drainage branch pipes (9) extend into the spray tower (1). A plurality of atomizing nozzles (10) are fixedly connected to the plurality of drainage branch pipes (9) at equal intervals. A demister (11) located above the drainage branch pipe (9) is fixedly installed in the spray tower (1). An air distribution assembly is arranged below the exhaust gas inlet pipe (3) in the spray tower (1). One end of the exhaust gas inlet pipe (3) extends into the spray tower (1) and is connected to the air distribution assembly. The air distribution assembly is used to evenly diffuse waste nitrogen oxides in the spray tower (1).

2. A nitrogen oxide waste gas treatment device according to claim 1, characterized in that: The air distribution assembly comprises a hollow air distribution plate (12), a plurality of support columns (13), a plurality of vertical air distribution pipes (14), a plurality of L-shaped air distribution pipes (15) and a plurality of air outlet heads (16); the hollow air distribution plate (12) is arranged in the spray tower (1) and is located below the exhaust gas inlet pipe (3); one end of the exhaust gas inlet pipe (3) located in the spray tower (1) extends into the hollow air distribution plate (12); the plurality of support columns (13) are fixedly mounted on the outer wall of the hollow air distribution plate (12) and are distributed in an annular manner with equal spacing; one end of the plurality of support columns (13) away from the hollow air distribution plate (12) is connected to the exhaust gas inlet pipe (3) and the exhaust gas inlet pipe (3) is connected to the exhaust gas inlet pipe (3) at the end thereof. The inner wall of the spray tower (1) is fixedly connected, the plurality of vertical air distribution pipes (14) are fixedly installed at the bottom of the hollow air distribution plate (12) and are evenly distributed, and the plurality of vertical air distribution pipes (14) are connected to the inside of the hollow air distribution plate (12), the plurality of L-shaped air distribution pipes (15) are fixedly installed at the outer edge of the bottom of the hollow air distribution plate (12) and are distributed in an annular manner with equal intervals, and the plurality of L-shaped air distribution pipes (15) are connected to the inside of the hollow air distribution plate (12), and the plurality of air outlet heads (16) are fixedly connected to the horizontal ends of the plurality of L-shaped air distribution pipes (15) and are evenly distributed.

3. A nitrogen oxide waste gas treatment device according to claim 2, characterized in that: The top surface of the hollow air distribution plate (12) is of an upwardly convex structure.

4. A nitrogen oxide waste gas treatment device according to claim 2, characterized in that: A dust filter (17) is fixedly installed in the spray tower (1), and the dust filter (17) is located between the exhaust gas inlet pipe (3) and the liquid discharge branch pipe (9).

5. A nitrogen oxide waste gas treatment device according to claim 4, characterized in that: The dust filter (17) is an upwardly convex arc-shaped structure.

6. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: A sewage pipe (18) is installed at the bottom of the left side of the spray tower (1), and a sewage valve (19) is fixedly installed on the sewage pipe (18).

7. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: An observation port is provided on the front inner wall of the liquid storage cavity (5), and an observation mirror (20) is fixedly installed in the observation port.

8. The nitrogen oxide waste gas treatment equipment according to claim 1, characterized in that: A liquid adding tube (21) connected to the liquid storage chamber (5) is fixedly mounted on the front side wall of the base (2), and an end cap (22) is threadedly mounted on the top end of the liquid adding tube (21).

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