Novel horizontal tail gas absorption tower

Abstract

The utility model discloses a novel horizontal tail gas absorption tower which comprises a tower body, an air inlet and an air outlet which are respectively communicated with two ends of the tower body along the axial direction of the tower body, the air inlet and the air outlet are of a square structure, a tail gas guide structure is fixedly connected inside the tower body, and the tail gas guide structure comprises two groups of vertical guide plates and a group of inclined guide plates. The two ends of the two vertical guide plates are fixedly connected with the inner walls of the two ends of the tower body, the two vertical guide plates are arranged on the two sides of the air inlet and the air outlet, and the inclined guide plate is connected to the lower end of the air outlet from the upper end of the air inlet along the diagonal faces of the two vertical guide plates. According to the utility model, the unique air inlet and outlet structure is adopted, the air distribution is uniform, the problem of difficult air distribution of large-air-volume waste gas is solved, the waste gas uniformly passes through the filler layer, the purification rate is improved, the air inlet flow velocity is reduced, a certain settling effect is achieved, and the flow velocity is further reduced after the waste gas is guided, contacted with the water surface and returned, so that the inertial dust removal effect is achieved; and finally, the air passes through the filler layer and the demisting layer and is discharged from the air outlet.

Description

Technical Field

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

[0002] The tail gas spray absorption tower uses the principle of countercurrent flow of gas and liquid to improve the contact between the tail gas and the spray liquid, so as to effectively neutralize and absorb the harmful components in the tail gas. This technology has been widely used in the field of tail gas treatment. However, the existing tail gas absorption towers face some problems that limit their treatment efficiency:

[0003] First, when the tail gas enters the tower, due to the short gas-liquid contact time and limited contact area, the neutralization and absorption efficiency of the spray liquid for the tail gas is not high; second, the rapid inflow of a large amount of tail gas may cause uneven gas flow distribution in the tower, that is, the tail gas fails to be evenly distributed across the entire cross-section, which further reduces the removal efficiency of the spray liquid for the pollutants in the tail gas. Content of the Utility Model

[0004] The purpose of the utility model is to provide a new type of horizontal tail gas absorption tower to solve the technical problems mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A new type of horizontal tail gas absorption tower includes a tower body. Along the axial direction of the tower body, a square-shaped air inlet and an air outlet are respectively connected at both ends of the tower body. A tail gas guiding structure is fixedly connected inside the tower body. The tail gas guiding structure includes two vertical guiding plates and one inclined guiding plate. The two ends of the two vertical guiding plates are fixedly connected to the inner walls at both ends of the tower body, and the two vertical guiding plates are arranged on both sides of the air inlet and outlet. The inclined guiding plate is connected from the upper end of the air inlet along the diagonal plane of the two vertical guiding plates to the lower end of the air outlet. On both sides of the tower body, a packing layer and a demisting layer are arranged from bottom to top in sequence. A spray pipeline is arranged between the packing layer and the demisting layer. A circulating liquid is stored at the bottom of the tower body, and the liquid level is lower than the vertical guiding plate.

[0007] As a further description of the above technical scheme:

[0008] It further includes a circulating liquid tank and a circulating liquid pump. The circulating liquid tank is arranged on one side of the bottom of the tower body. The circulating liquid tank is connected to the tower body. The circulating liquid pump is fixedly installed on the circulating liquid tank. The input end of the circulating liquid pump is connected to the circulating liquid tank, and the output end of the circulating liquid pump is connected to the input end of the spray pipeline.

[0009] As a further description of the above technical scheme:

[0010] There are two groups of first packing supports and second packing supports arranged longitudinally and fixedly connected between the vertical guide plate and the side wall of the tower body. The packing layer is arranged on the first packing support, and the demisting layer is arranged on the second packing support.

[0011] As a further description of the above technical solution:

[0012] The packing layer is selected from corrugated plates made of metal, ceramic material or plastic mesh.

[0013] As a further description of the above technical solution:

[0014] The demisting layer is selected from wire mesh demisters or fiber demisters.

[0015] As a further description of the above technical solution:

[0016] A number of manholes are opened on both sides of the tower body, and viewing windows are installed on the manholes.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows: The provided exhaust gas guiding structure forms a unique air inlet and outlet structure in the tower body, with uniform gas distribution, solving the problem of difficult gas distribution for large-volume exhaust gas. The exhaust gas uniformly passes through the packing layer, improving the purification rate, reducing the inlet gas flow rate, having a certain sedimentation effect. At the same time, after the exhaust gas is guided and contacts the water surface and then turns back, the flow rate is further reduced, playing a role in inertial dust removal. Finally, it passes through the packing layer and the demisting layer and is discharged from the air outlet. Compared with general packing towers, this device has uniform air distribution, and combines the principles of sedimentation and inertial dust removal, allowing the exhaust gas to have a large dust content, being suitable for spray painting exhaust gas, having a high paint slag removal rate, not being blocked, and being convenient for cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shows a front view schematic diagram of a new type of horizontal tail gas absorption tower provided according to an embodiment of the present utility model;

[0019] Figure 2 Shows a side view structural schematic diagram of a new type of horizontal tail gas absorption tower provided according to an embodiment of the present utility model.

[0020] Legend Explanation:

[0021] 1. Tower body; 2. Viewing window; 3. Tail gas guiding structure; 4. Air inlet; 5. Air outlet; 6. Circulation liquid tank; 7. Circulation liquid pump; 8. Demisting layer; 9. First packing support; 10. Spraying pipeline; 11. Packing layer; 12. Second packing support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 and Figure 2 As shown in the figure, the present utility model provides a technical solution: a new type of horizontal tail gas absorption tower, including a tower body 1. Along the axial direction of the tower body 1, a square-shaped air inlet 4 and an air outlet 5 are respectively connected at both ends of the tower body 1. Inside the tower body 1, a tail gas guiding structure 3 is fixedly connected. The tail gas guiding structure 3 includes two vertical guiding plates and one inclined guiding plate. The two ends of the two vertical guiding plates are fixedly connected to the inner walls at both ends of the tower body 1, and the two vertical guiding plates are arranged on both sides of the air inlet and outlet. The inclined guiding plate is connected from the upper end of the air inlet 4 along the diagonal plane of the two vertical guiding plates to the lower end of the air outlet 5. On both sides of the tower body 1, a packing layer 11 and a demisting layer 8 are sequentially arranged from bottom to top. Two longitudinally arranged first packing supports 9 and second packing supports 12 are fixedly connected between the vertical guiding plates and the side wall of the tower body 1. The packing layer 11 is arranged on the first packing support 9, and the demisting layer 8 is arranged on the second packing support 12. A spray pipeline 10 is arranged between the packing layer 11 and the demisting layer 8. The bottom of the tower body 1 stores circulating liquid with a liquid level lower than the vertical guiding plate. A circulating liquid tank 6 is arranged on one side of the bottom of the tower body 1. The circulating liquid tank 6 is connected to the tower body 1. A circulating liquid pump 7 is fixedly installed on the circulating liquid tank 6. The input end of the circulating liquid pump 7 is connected to the circulating liquid tank 6, and the output end of the circulating liquid pump 7 is connected to the input end of the spray pipeline 10. The waste gas enters the tower through the air inlet 4. Under the guiding effect of the lower space of the two vertical guiding plates and the inclined guiding plate, the wind direction is downward. After the waste gas contacts the circulating liquid surface at the bottom of the tower body, it turns back upward. The waste gas enters the packing layer 11. There is an absorption liquid (if it is an acidic waste gas, an alkaline absorption liquid such as sodium hydroxide absorption liquid can be selected) sprayed from the spray pipeline 10 on the packing layer 11, and a liquid film is formed on the packing. When the waste gas flows through the voids of the packing, it contacts the packing liquid film and undergoes absorption or comprehensive reaction. The packing layer 11 can provide a sufficiently large surface area, and there is a large contact area and reaction time between the waste gas and the absorption liquid on the surface of the packing. At the same time, the gas flow does not cause too much resistance. After being dehydrated and demisted by the demisting layer 8, the gas after absorption or comprehensive reaction is discharged through the air outlet 5 under the guiding effect of the upper space of the two vertical guiding plates and the inclined guiding plate, separating the pollutant substances in the gas and converting them into harmless substances to achieve the purpose of purifying the gas. Among them, the absorption liquid is sprayed downward in the tower after being pressurized by the circulating liquid pump 7, and finally flows back to the circulating liquid at the bottom of the tower and is recycled after being treated with chemicals. The sediment is regularly removed and transported out.

[0024] In this device, the provided waste gas guiding structure forms a unique air inlet and outlet structure inside the tower body, with uniform air distribution, solving the problem of difficult air distribution for waste gas with large air volume. The waste gas passes through the packing layer evenly, improving the purification rate, reducing the inlet air flow velocity, having a certain sedimentation effect. At the same time, after the waste gas is guided and its velocity further decreases after turning back after contacting the water surface, it plays a role in inertial dust removal. Finally, it passes through the packing layer and the demisting layer and is discharged from the air outlet. Compared with general packing towers, this device has uniform air distribution, and combines the principles of sedimentation and inertial dust removal, allowing the waste gas to have a relatively large dust content, being suitable for spray painting waste gas, having a high paint slag removal rate, not being blocked, and being convenient for cleaning and maintenance.

[0025] Specifically, the main function of the packing layer 11 is to increase the contact area between the gas and liquid phases and improve the mass transfer efficiency. In this embodiment, the packing layer 11 is selected as a corrugated plate made of metal, ceramic material or plastic mesh, which is arranged neatly and can provide a larger surface area and a more uniform liquid distribution.

[0026] Specifically, the demisting layer 8 is mainly used to remove the moisture in the waste gas to avoid affecting the subsequent treatment equipment. In this embodiment, the demisting layer 8 is selected as a wire mesh demister or a fiber demister. The wire mesh demister is made of metal wire mesh and can intercept the liquid droplets in the waste gas, thus realizing gas-liquid separation; the fiber demister is made of synthetic fiber materials and has a relatively large specific surface area, which can effectively capture fine liquid droplets.

[0027] Specifically, as Figure 1 and Figure 2 shown, a number of manholes are opened on both sides of the tower body 1 and viewing windows 2 installed on the manholes. The manholes are designed at appropriate positions in the tail gas absorption tower so that the staff can enter the tower interior for inspection, cleaning and necessary maintenance. The viewing window 2 is a transparent window that allows external observation of the operation inside the tower without opening the tower body 1. The manholes and viewing windows 2 are usually made of corrosion-resistant materials to adapt to the possible chemical environment inside the tower. For example, the viewing window material may be made of transparent PVC or other chemical-resistant transparent plastics.

[0028] Working principle: During use, the waste gas enters the tower through the air inlet 4. Under the guiding effect of the lower space of the vertical guiding plates and inclined guiding plates on both sides, the wind direction is downward. After the waste gas contacts the circulating liquid surface at the bottom of the tower, it turns back upward. The waste gas enters the packing layer 11. There is an absorption liquid (if it is an acidic waste gas, an alkaline absorption liquid such as sodium hydroxide absorption liquid can be selected) sprayed from the spraying pipeline 10 on the packing layer 11, and a liquid film is formed on the packing. When the waste gas flows through the voids of the packing, it contacts the packing liquid film and undergoes absorption or comprehensive reaction. The packing layer 11 can provide a sufficiently large surface area, and there is a large contact area and reaction time between the waste gas and the absorption liquid on the packing surface. At the same time, the gas flow does not cause too much resistance. After the gas is absorbed or comprehensively treated, it is dehydrated and demisted by the demisting layer 8, and then discharged through the air outlet 5 under the guiding effect of the upper space of the vertical guiding plates and inclined guiding plates on both sides, separating the pollutant substances in the gas and converting them into harmless substances, achieving the purpose of purifying the gas.

[0029] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A novel horizontal tail gas absorption tower, comprising a tower body (1), wherein along the axial direction of the tower body (1), an air inlet (4) and an air outlet (5) in a square structure are respectively connected at both ends of the tower body (1), characterized in that: The tower body (1) is fixedly connected to an exhaust gas guide structure (3) inside. The exhaust gas guide structure (3) comprises two groups of vertical guide plates and one group of oblique guide plates. The ends of the two groups of vertical guide plates are fixedly connected to the inner walls of the tower body (1) at both ends. The two groups of vertical guide plates are arranged on both sides of the air inlet and outlet. The oblique guide plates are connected from the upper end of the air inlet (4) to the lower end of the air outlet (5) along the diagonal surfaces of the two groups of vertical guide plates. The two sides of the tower body (1) are sequentially provided with a packing layer (11) and a demisting layer (8) from bottom to top. A spray pipeline (10) is provided between the packing layer (11) and the demisting layer (8). The bottom of the tower body (1) stores circulating liquid with a liquid level lower than that of the vertical guide plates.

2. A novel horizontal tail gas absorption tower according to claim 1, characterized in that: The tower body (1) further comprises a circulating liquid tank (6) and a circulating liquid pump (7). The circulating liquid tank (6) is arranged on one side of the bottom of the tower body (1). The circulating liquid tank (6) is connected to the tower body (1). The circulating liquid pump (7) is fixedly mounted on the circulating liquid tank (6). The input end of the circulating liquid pump (7) is connected to the circulating liquid tank (6), and the output end of the circulating liquid pump (7) is connected to the input end of the spray pipeline (10).

3. A novel horizontal tail gas absorption tower according to claim 2, characterized in that: Two groups of first filling supports (9) and second filling supports (12) arranged in the longitudinal direction are fixedly connected between the vertical guide plate and the side wall of the tower body (1); the filling layer (11) is arranged on the first filling support (9), and the demisting layer (8) is arranged on the second filling support (12).

4. A novel horizontal tail gas absorption tower according to claim 3, characterized in that: The packing layer (11) is a corrugated plate made of metal, ceramic material or plastic mesh.

5. A novel horizontal tail gas absorption tower according to claim 4, characterized in that: The demisting layer (8) is a wire mesh demisting device or a fiber demisting device.

6. A novel horizontal tail gas absorption tower according to claim 5, characterized in that: A plurality of manholes and viewing windows (2) installed on the manholes are provided on both sides of the tower body (1).

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