Tail gas absorption tower

Abstract

The utility model relates to a tail gas absorption tower, including a tower body, a first spray unit and a second spray unit, an air inlet is provided at the lower part of the tower body, an air outlet is provided at the upper part thereof, a first filler and a second filler are sequentially arranged inside the tower body from bottom to top, and the first filler and the second filler are located between the air inlet and the air outlet; the first spray unit includes a first sprayer arranged above the first filler and arranged toward the first filler, and the second spray unit includes a second sprayer arranged above the second filler and arranged toward the second filler. Compared with the prior art, the tail gas absorption tower provided by the utility model utilizes fillers to increase the contact area between the tail gas and the absorption liquid, and has a better absorption effect than the traditional direct spray absorption tower, and uses two absorptions at the same time to ensure that the harmful substances in the tail gas are fully absorbed, and on the premise of ensuring the absorption effect, the floor space is greatly reduced, saving land resources.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a tail gas absorption tower. Background Art

[0002] In industrial production, waste gas, waste water and waste are often generated. If these industrial wastes are discharged directly without treatment, they will cause serious damage to the environment.

[0003] For the treatment of exhaust gas, tail gas absorption towers are often used to absorb toxic and harmful substances in the tail gas, and then the remaining harmless gas is discharged into the atmosphere. In order to ensure that the toxic and harmful substances in the tail gas are fully absorbed, multiple tail gas absorption towers are generally set up in succession for multi-stage absorption. Although this method has a better tail gas absorption effect, it also occupies a larger plant area. Utility Model Content

[0004] In view of this, it is necessary to provide a tail gas absorption tower to solve the technical problem of the large footprint of the tail gas absorption tower in the prior art.

[0005] The utility model provides a tail gas absorption tower, which comprises: a tower body, a first spray unit and a second spray unit, wherein an air inlet is provided at the lower part of the tower body, and an air outlet is provided at the upper part thereof, a first filler and a second filler are sequentially arranged inside the tower body from bottom to top, and the first filler and the second filler are located between the air inlet and the air outlet; the first spray unit comprises a first sprayer which is arranged above the first filler and is arranged toward the first filler, and the first sprayer can spray a first absorption liquid onto the first filler, and the second spray unit comprises a second sprayer which is arranged above the second filler and is arranged toward the second filler, and the second sprayer can spray a second absorption liquid onto the second filler.

[0006] Furthermore, the first spray unit also includes a first circulation pipe and a first circulation pump. The first circulation pipe connects the first sprayer and the bottom of the tower body. The first circulation pump is arranged on the first circulation pipe to drive the first absorption liquid at the bottom of the tower body to flow to the first sprayer.

[0007] Furthermore, the first spray unit also includes a third sprayer, which is arranged between the first filler and the air inlet and faces the bottom of the tower body. The third sprayer is connected to the first circulation pipe, and the first circulation pump can drive the first absorption liquid at the bottom of the tower body to flow to the first sprayer and the third sprayer.

[0008] Furthermore, the second spray unit also includes a receiving tray, a second circulation pipe and a second circulation pump. The receiving tray is arranged between the first sprayer and the second filler, and has a channel for the exhaust gas to pass through; the second circulation pipe connects the second sprayer and the receiving tray, and the second circulation pump is arranged on the second circulation pipe to drive the second absorption liquid on the receiving tray to flow to the second sprayer.

[0009] Furthermore, the first sprayer has a plurality of first atomizing nozzles, the second sprayer has a plurality of second atomizing nozzles, the third sprayer has a plurality of third atomizing nozzles, and the inner diameter of the second atomizing nozzle is larger than that of the first atomizing nozzle and the third atomizing nozzle.

[0010] Furthermore, the inner diameter of the first atomizing nozzle is 1 mm, the inner diameter of the second atomizing nozzle is 2 mm, and the inner diameter of the third atomizing nozzle is 1 mm.

[0011] Furthermore, the first absorption liquid and the second absorption liquid are the same solution, but the concentration of the first absorption liquid is greater than that of the second absorption liquid.

[0012] Furthermore, the first absorption liquid is a sodium hypochlorite aqueous solution, and the second absorption liquid is water.

[0013] Furthermore, the first filler has a porous structure and can absorb a certain amount of the first absorption liquid, and the tail gas can also pass through the first filler.

[0014] Furthermore, the second filler has a porous structure and can absorb a certain amount of the second absorption liquid, and the tail gas can also pass through the second filler.

[0015] Compared with the prior art, the exhaust gas absorption tower provided by the utility model utilizes fillers to increase the contact area between the exhaust gas and the absorption liquid. Compared with the traditional direct spray absorption tower, the absorption effect is better. At the same time, two absorptions are used to ensure that the harmful substances in the exhaust gas are fully absorbed. Under the premise of ensuring the absorption effect, the occupied area is greatly reduced, saving land resources.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiment of the utility model is described in detail as follows with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] FIG1 is a schematic structural diagram of a preferred embodiment of a tail gas absorption tower provided by the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] See also Figure 1 The utility model provides a tail gas absorption tower. The tail gas absorption tower can be used in the waste gas treatment of kitchen waste, and can also be used in other productions that require tail gas spraying and absorption. In the utility model, only the tail gas absorption tower treating the waste gas generated by kitchen waste is used as an example for explanation, and the principle of the tail gas absorption tower treating other waste gases is essentially the same as the principle of treating the waste gas generated by kitchen waste, which will not be repeated here.

[0021] The tail gas absorption tower comprises a tower body 1, a first spray unit 2 and a second spray unit 3. An air inlet 11 is provided at the lower part of the tower body 1, and an air outlet 12 is provided at the upper part. Untreated tail gas is introduced from the air inlet 11, and harmless tail gas after treatment is discharged from the air outlet 12. A first filler 4 and a second filler 5 are sequentially arranged inside the tower body 1 from bottom to top, and the first filler 4 and the second filler 5 are located between the air inlet 11 and the air outlet 12. The tail gas will pass through the first filler 4 and the second filler 5 in the tower body 1 in sequence.

[0022] The first spray unit 2 includes a first sprayer 21 disposed above the first filler 4 and arranged toward the first filler 4, and the first sprayer 21 can spray the first absorption liquid toward the first filler 4. The second spray unit 3 includes a second sprayer 31 disposed above the second filler 5 and arranged toward the second filler 5, and the second sprayer 31 can spray the second absorption liquid toward the second filler 5.

[0023] After the tail gas enters the tower body 1 from the air inlet 11, it moves upward and passes through the first filler 4. During this process, it is sprayed by the first absorption liquid and absorbs the harmful substances therein. Then it passes through the second filler 5 and is sprayed by the second absorption liquid to continue to absorb the remaining harmful substances therein. The contact area between the tail gas and the absorption liquid is increased by the filler, and the absorption effect is better than that of the traditional direct spray absorption tower. At the same time, two absorptions are used to ensure that the harmful substances in the tail gas are fully absorbed. On the premise of ensuring the absorption effect, the floor space is greatly reduced and land resources are saved.

[0024] In some embodiments, the first spray unit 2 further includes a first circulation pipe 22 and a first circulation pump 23. The first circulation pipe 22 connects the first sprayer 21 and the bottom of the tower body 1. The first circulation pump 23 is arranged on the first circulation pipe 22 to drive the first absorption liquid at the bottom of the tower body 1 to flow to the first sprayer 21. Thus, the first absorption liquid is reused to avoid waste. The first circulation pipe 22 is also provided with a filling device to replenish the consumed effective components in the first absorption liquid to maintain the absorption effect.

[0025] In some embodiments, the first spray unit 2 further includes a third sprayer 24, which is arranged between the first filler 4 and the air inlet 11 and faces the bottom of the tower body 1. The third sprayer 24 is connected to the first circulation pipe 22, and the first circulation pump 23 can drive the first absorption liquid at the bottom of the tower body 1 to flow to the first sprayer 21 and the third sprayer 24. When the tail gas just enters the air inlet 11, the concentration of harmful components is the highest. The third sprayer 24 is first used to perform conventional spraying treatment on it to greatly reduce the content of harmful components therein. Then, the first sprayer 21 is used in combination with the first filler 4 to further absorb and treat the tail gas to further reduce the content of harmful substances.

[0026] In some embodiments, the second spray unit 3 further includes a receiving tray 32, a second circulation pipe 33 and a second circulation pump 34. The receiving tray 32 is arranged between the first sprayer 21 and the second filler 5, and the receiving tray 32 has a channel for the exhaust gas to pass through. The second circulation pipe 33 connects the second sprayer 31 and the receiving tray 32, and the second circulation pump 34 is arranged on the second circulation pipe 33 to drive the second absorption liquid on the receiving tray 32 to flow to the second sprayer 31. Similar to the first spray unit 2, it is also for reusing the second absorption liquid to avoid waste. Similarly, a filling device is also provided on the second circulation pipe 33 to replenish the consumed effective ingredients in the second absorption liquid to maintain the absorption effect.

[0027] In some embodiments, the first sprayer 21 has a plurality of first atomizing nozzles, the second sprayer 31 has a plurality of second atomizing nozzles, and the third sprayer 24 has a plurality of third atomizing nozzles, wherein the inner diameter of the second atomizing nozzle is larger than that of the first atomizing nozzle and the third atomizing nozzle.

[0028] In this embodiment, the inner diameter of the first atomizing nozzle is 1 mm, the inner diameter of the second atomizing nozzle is 2 mm, and the inner diameter of the third atomizing nozzle is 1 mm.

[0029] In some embodiments, the first absorption liquid and the second absorption liquid are the same solution, and the concentration of the first absorption liquid is greater than that of the second absorption liquid, so as to fully absorb harmful substances such as exhaust gas.

[0030] In other embodiments, the first absorption liquid is a sodium hypochlorite aqueous solution, and the second absorption liquid is water. Water can also be regarded as a sodium hypochlorite aqueous solution with a concentration of zero. Sodium hypochlorite has a strong oxidizing property and can oxidize harmful substances. It is preferred to use nano-scale sodium hypochlorite to prepare the solution, so as to improve the absorption efficiency of harmful substances by increasing the activity of sodium hypochlorite.

[0031] In some embodiments, the first filler 4 is a porous structure, which can absorb a certain amount of the first absorption liquid, and the exhaust gas can also pass through the first filler 4.

[0032] Similarly, the second filler 5 is also a porous structure, which can absorb a certain amount of the second absorption liquid, and the tail gas can also pass through the second filler 5.

[0033] When the tail gas just enters the air inlet 11, the concentration of harmful components is the highest. The third sprayer 24 is first used to perform conventional spraying treatment on it to greatly reduce the content of harmful substances therein. Then, when the tail gas passes through the first filler 4, the porous structure disperses the tail gas, so that the tail gas is fully in contact with the first absorption liquid in the first filler 4, further reducing the content of harmful substances therein. Then the tail gas passes through the receiving tray 32 and enters the second filler 5. The second filler 5 also makes the tail gas fully in contact with the second absorption liquid therein, absorbing the remaining small amount of harmful substances in the tail gas. At this time, the content of harmful substances in the tail gas has been reduced to below the specified level and can be discharged through the air outlet 12.

[0034] Compared with the prior art, the exhaust gas absorption tower provided by the utility model utilizes fillers to increase the contact area between the exhaust gas and the absorption liquid. Compared with the traditional direct spray absorption tower, the absorption effect is better. At the same time, two absorptions are used to ensure that the harmful substances in the exhaust gas are fully absorbed. Under the premise of ensuring the absorption effect, the occupied area is greatly reduced, saving land resources.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A tail gas absorption tower, characterized in that: It includes: A tower body, a first spray unit and a second spray unit, wherein an air inlet is provided at the lower part of the tower body and an air outlet is provided at the upper part thereof, a first filler and a second filler are sequentially arranged inside the tower body from bottom to top, and the first filler and the second filler are located between the air inlet and the air outlet; the first spray unit comprises a first sprayer arranged above the first filler and facing the first filler, the first sprayer can spray a first absorption liquid onto the first filler, and the second spray unit comprises a second sprayer arranged above the second filler and facing the second filler, the second sprayer can spray a second absorption liquid onto the second filler.

2. The tail gas absorption tower according to claim 1, characterized in that: The first spray unit also includes a first circulation pipe and a first circulation pump. The first circulation pipe connects the first sprayer and the bottom of the tower body. The first circulation pump is arranged on the first circulation pipe to drive the first absorption liquid at the bottom of the tower body to flow to the first sprayer.

3. The tail gas absorption tower according to claim 2, characterized in that: The first spray unit also includes a third sprayer, which is arranged between the first filler and the air inlet and faces the bottom of the tower body. The third sprayer is connected to the first circulation pipe, and the first circulation pump can drive the first absorption liquid at the bottom of the tower body to flow to the first sprayer and the third sprayer.

4. The tail gas absorption tower according to claim 1, characterized in that: The second spray unit further comprises a receiving tray, a second circulation pipe and a second circulation pump, wherein the receiving tray is arranged between the first sprayer and the second filler, and the receiving tray has a channel for the tail gas to pass through; The second circulation pipe is connected to the second sprayer and the receiving tray, and the second circulation pump is arranged on the second circulation pipe to drive the second absorption liquid on the receiving tray to flow to the second sprayer.

5. The tail gas absorption tower according to claim 3, characterized in that: The first sprayer has a plurality of first atomizing nozzles, the second sprayer has a plurality of second atomizing nozzles, the third sprayer has a plurality of third atomizing nozzles, and the inner diameter of the second atomizing nozzle is larger than that of the first atomizing nozzle and the third atomizing nozzle.

6. The tail gas absorption tower according to claim 5, characterized in that: The inner diameter of the first atomizing nozzle is 1 mm, the inner diameter of the second atomizing nozzle is 2 mm, and the inner diameter of the third atomizing nozzle is 1 mm.

7. The tail gas absorption tower according to claim 1, characterized in that: The first absorption liquid and the second absorption liquid are the same solution, but the concentration of the first absorption liquid is greater than that of the second absorption liquid.

8. The tail gas absorption tower according to claim 1, characterized in that: The first absorption liquid is a sodium hypochlorite aqueous solution, and the second absorption liquid is water.

9. The tail gas absorption tower according to claim 1, characterized in that: The first filler has a porous structure and can absorb a certain amount of the first absorption liquid, and the tail gas can also pass through the first filler.

10. The tail gas absorption tower according to claim 1, characterized in that: The second filler has a porous structure and can absorb a certain amount of the second absorption liquid, and the tail gas can also pass through the second filler.

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