Efficient waste gas treatment device

Abstract

The utility model relates to an efficient waste gas treatment device, which comprises a spray tower body, an annular spray pipeline and an axial flow pump, the axial flow pump is arranged at the bottom in the spray tower body, the axial flow pump is upwards connected with a spray main pipeline, the spray main pipeline is respectively communicated with the annular spray pipeline, and a plurality of spray heads are arranged on the annular spray pipeline. According to the utility model, by arranging the annular spraying pipeline, water distribution is more uniform and stable, and by transforming the spraying layers into multiple layers, the possibility of flue gas escape is avoided, and the treatment effect is more ideal; the pipe diameter of each spraying branch pipe is adjusted according to the number of the spraying heads on each spraying branch pipe, so that the water spraying amount of each spraying head is more uniform, and the phenomenon of incomplete local absorption is avoided; the centrifugal pump is replaced by the axial flow pump, and the spraying main pipeline is arranged at the center position in the tower body, so that the external space and the occupied area of the tower body are saved, greater economic benefits are created for enterprises, and the problem of acid leakage caused by abrasion of the centrifugal pump body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental engineering atmosphere treatment, in particular to a high-efficiency waste gas treatment device. Background Art

[0002] As the country's air emission targets continue to increase, the existing treatment processes are often unable to meet emission requirements. Among them, ammonia is an important emission standard, and the current method for treating ammonia is mainly spraying acid mist.

[0003] In order to ensure the reaction effect of the absorption liquid, the traditional spraying process usually requires increasing the volume of the absorption tower, reducing the gas flow rate, increasing the number of nozzles, increasing the absorption liquid flow rate, etc. In addition, the spray pump is generally a centrifugal pump outside the tower body, and the pipeline and pump body occupy a lot of space, which increases the floor space, and then leads to an increase in the investment cost and operating cost of the enterprise, which is not conducive to the development of the enterprise, so it needs further improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a high-efficiency exhaust gas treatment device.

[0005] The utility model is realized through the following technical solutions:

[0006] A high-efficiency waste gas treatment device comprises a spray tower body, a multi-layer annular spray pipeline located inside the spray tower body, and an axial flow pump connected to the annular spray pipeline, wherein an air inlet is arranged on the side of the lower part of the spray tower body, and an air outlet is arranged on the upper part of the spray tower body, the air inlet is arranged below the annular spray pipeline, the axial flow pump is arranged at the bottom of the spray tower body, the axial flow pump is connected upwardly to a spray main pipeline, the spray main pipeline is respectively connected to the annular spray pipeline, and a plurality of nozzles are arranged on the annular spray pipeline.

[0007] According to the above technical solution, preferably, the annular spray pipeline includes an annular spray pipe, a spray secondary pipe located in the middle of the annular spray pipe and connected thereto, and a plurality of groups of spray branch pipes connected between the spray secondary pipe and the annular spray pipe, the spray secondary pipe is connected to the spray main pipe, and the spray head is located on the spray secondary pipe and the spray branch pipe.

[0008] According to the above technical solution, preferably, when the number of nozzles on each group of the spray branch pipes is different, the diameter of the spray branch pipe with a smaller number of nozzles is smaller than the diameter of the spray branch pipe with a larger number of nozzles.

[0009] According to the above technical solution, preferably, the annular spray pipeline is provided with at least 2 layers in the spray tower body.

[0010] According to the above technical solution, preferably, a packing layer is provided below the annular spray pipeline.

[0011] The beneficial effects of the utility model are:

[0012] The utility model arranges a ring-type spray pipeline to make water distribution more uniform and stable, and transforms the spray layer into multiple layers to prevent smoke from escaping, thereby achieving a more ideal treatment effect; the diameter of the spray branch pipe is adjusted according to the number of nozzles on each spray branch pipe, so that the water spray volume of each nozzle is more uniform, thereby avoiding the phenomenon of incomplete local absorption; by replacing the centrifugal pump with an axial flow pump and placing the spray main pipeline at the center of the tower body, the external space and floor area of ​​the tower body are saved, thereby creating greater economic benefits for the enterprise and avoiding the problem of acid leakage caused by wear of the centrifugal pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a main structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the annular spray pipeline of the utility model when viewed from above.

[0015] In the figure: 1. annular spray pipe a; 2. air inlet; 3. spray main pipeline; 4. nozzle; 5. axial flow pump; 6. annular spray pipe b; 7. air outlet; 8. branch pipe a; 9. branch pipe b; 10. spray tower body; 11. acid absorption liquid; 12. upper limit of the first layer of packing; 13. upper limit of the second layer of packing; 14. packing bracket; 15. spray secondary pipeline. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0017] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0018] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Embodiment 1: As shown in the figure, the utility model includes a spray tower body 10, a multi-layer annular spray pipeline located inside the spray tower body 10, and an axial flow pump 5 connected to the annular spray pipeline, an air inlet 2 is arranged on the lower side of the spray tower body 10, an air outlet 7 is arranged on the upper part of the spray tower body 10, the air inlet 2 is arranged below the annular spray pipeline, the axial flow pump 5 is arranged at the bottom center position of the spray tower body 10, the axial flow pump 5 is connected upwardly with a spray main pipeline 3, the spray main pipeline 3 is respectively connected to the annular spray pipeline, and a plurality of nozzles 4 are arranged on the annular spray pipeline.

[0020] Among them, the annular spray pipeline is set in at least 2 layers in the spray tower body 10. In this example, a 2-layer annular spray pipeline (annular spray pipe a1, annular spray pipe b6) is taken as an example. The annular spray pipeline includes an annular spray pipe, a spray secondary pipe 15 located in the middle of the annular spray pipe and connected thereto, and multiple groups of spray branches connected between the spray secondary pipe 15 and the annular spray pipe. The spray secondary pipe 15 is connected to the spray main pipe 3, and the spray head 4 is located on the spray secondary pipe 15 and the spray branch pipe. By designing the pressure stabilizing effect of the annular spray pipe, the pressure of the liquid at each point in the pipeline on the pipe wall is more balanced, avoiding the phenomenon that the closer to the spray main pipe 3, the greater the pressure, and the more absorption liquid is sprayed.

[0021] In addition, when the number of nozzles 4 on each group of the spray branch pipes is different, the diameter of the spray branch pipe with fewer nozzles 4 is smaller than the diameter of the spray branch pipe with more nozzles 4. Specifically, because the number of nozzles 4 on each branch pipe is different, if the same type of branch pipe is used, the flow rate of the branch pipe with fewer nozzles 4 will be larger, which will lead to a large amount of liquid sprayed by the nozzle 4. In order to make the spraying more uniform and the absorption effect better, the measure of changing the diameter of the branch pipe according to the number of nozzles 4 is taken in this example, that is, the spray branch pipe with more nozzles 4 (branch pipe a8) uses a DN40 pipe, and the spray branch pipe with fewer nozzles 4 (branch pipe b9) uses a DN32 pipe.

[0022] Embodiment 2: Based on the above-mentioned embodiment 1, preferably, the waste gas treatment device of the present application includes a spray tower body 10, a multi-layer annular spray pipeline located inside the spray tower body 10, and an axial flow pump 5 connected to the annular spray pipeline, the spray tower body 10 is provided with an air inlet 2 on the lower side, the spray tower body 10 is provided with an air outlet 7 on the upper part, the air inlet 2 is provided below the annular spray pipeline, the axial flow pump 5 is provided at the bottom of the spray tower body 10, the axial flow pump 5 is connected upwardly with a spray main pipeline 3, the spray main pipeline 3 is respectively connected to the annular spray pipeline, and a plurality of nozzles 4 are provided on the annular spray pipeline.

[0023] A packing layer is arranged below the annular spray pipeline. Specifically, a packing bracket 14 is arranged in the spray tower body 10 for installing the packing layer. There is a certain distance ( Figure 1 The first layer filling upper limit 12 and the second layer filling upper limit 13 are marked.

[0024] The working principle of the utility model is: when the flue gas containing ammonia enters from the air inlet 2, passes through the packing layer in the tower, and is pushed by the axial flow pump 5 in the spray tower body 10, the acid absorption liquid 11 (preferably H2SO4) passes through the spray main pipeline 3, the spray secondary pipeline 15, the annular spray pipe, the spray branch pipe, and the nozzle 4, and is sprayed out in the form of acid mist, fully contacts with ammonia and undergoes a chemical reaction: 2NH3+H2SO4===(NH4)2SO4, and the purified flue gas is discharged through the air outlet 7.

[0025] The utility model arranges a ring-type spray pipeline to make water distribution more uniform and stable, and transforms the spray layer into multiple layers to prevent smoke from escaping, thereby achieving a more ideal treatment effect; the diameter of the spray branch pipe is adjusted according to the number of nozzles on each spray branch pipe, so that the water spray volume of each nozzle is more uniform, thereby avoiding the phenomenon of incomplete local absorption; by replacing the centrifugal pump with an axial flow pump and placing the spray main pipeline at the center of the tower body, the external space and floor area of ​​the tower body are saved, thereby creating greater economic benefits for the enterprise and avoiding the problem of acid leakage caused by wear of the centrifugal pump body.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-efficiency exhaust gas treatment device, characterized in that: The invention comprises a spray tower body (10), a multi-layered annular spray pipeline located inside the spray tower body (10), and an axial flow pump (5) connected to the annular spray pipeline. An air inlet (2) is arranged on the side of the lower part of the spray tower body (10), and an air outlet (7) is arranged on the upper part of the spray tower body (10). The air inlet (2) is arranged below the annular spray pipeline. The axial flow pump (5) is arranged at the bottom of the spray tower body (10), and the axial flow pump (5) is upwardly connected to a spray main pipeline (3), and the spray main pipeline (3) is respectively connected to the annular spray pipeline, and a plurality of spray heads (4) are arranged on the annular spray pipeline.

2. According to claim 1, a high-efficiency exhaust gas treatment device is characterized in that: The annular spray pipeline comprises an annular spray pipe, a spray secondary pipe (15) located in the middle of the annular spray pipe and connected thereto, and a plurality of spray branch pipes connected between the spray secondary pipe (15) and the annular spray pipe. The spray secondary pipe (15) is connected to the spray main pipe (3), and the spray head (4) is located on the spray secondary pipe (15) and the spray branch pipe.

3. According to claim 2, a high-efficiency exhaust gas treatment device is characterized in that: When the number of nozzles (4) on each group of the spray branch pipes is different, the diameter of the spray branch pipe with a smaller number of nozzles (4) is smaller than the diameter of the spray branch pipe with a larger number of nozzles (4).

4. According to claim 1, a high-efficiency exhaust gas treatment device is characterized in that: The annular spray pipeline is arranged in at least two layers in the spray tower body (10).

5. The high-efficiency exhaust gas treatment device according to any one of claims 1 to 4, characterized in that: A packing layer is arranged below the annular spray pipeline.

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