Sulfur-containing tail gas absorption treatment device

Abstract

The utility model discloses a sulfur-containing tail gas absorption treatment device which comprises a device body with supporting legs at the bottom, a circulating spraying assembly is installed at the top of an inner cavity of the device body, the lower end of the circulating spraying assembly is communicated with the bottom of the inner cavity of the device body, and an absorption assembly is installed on the inner wall of the device body. The absorption assembly comprises a mounting box, a dispersing assembly is fixedly connected to the lower end face of the mounting box, and a closed area defined by the mounting box and the dispersing assembly is filled with particle filler. Through the arrangement of the absorption assembly, the contact time of tail gas and an absorbent solution is greatly prolonged, the absorption rate of sulfide is improved, meanwhile, solid impurities in the tail gas are adsorbed, the solid impurities are prevented from being attached, the effective service life of the absorption assembly is prolonged, and the cleaning and updating times of equipment are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical tail gas treatment, in particular to a sulfur-containing tail gas absorption and treatment device. Background Technique

[0002] During the catalyst preparation process, sulfur-containing tail gas is often generated. Directly discharging the sulfur-containing tail gas into the air will pollute the environment. Therefore, it needs to be absorbed and treated before being discharged. The common desulfurization method generally uses an alkaline desulfurizer solution for absorption. The tail gas is passed from bottom to top, and the absorption liquid is passed from top to bottom to absorb the sulfur in the tail gas. However, the contact time between the gas and the desulfurizer solution is short, and the situation of incomplete desulfurization is likely to occur.

[0003] After retrieval, the application number CN202323164761.4 discloses a tail gas treatment device, which includes a first recovery mechanism connected to an inlet pipe, a second recovery mechanism connected to the first recovery mechanism. The first recovery mechanism includes a liquid storage tank and a separation tank. A spraying mechanism connected to the liquid storage tank and several groups of parallel adsorption plates are arranged in the separation tank. A gap is formed between two adjacent adsorption plates, and the spray head of the spraying mechanism faces the gap. The tail gas is multi-step treated by the first and second recovery mechanisms to completely separate the particulate matter and gas of the sulfur-containing tail gas, effectively improving the purification effect of the tail gas.

[0004] The existing tail gas treatment device conducts multi-step absorption treatment on sulfur-containing tail gas, gradually absorbing particulate matter and sulfur-containing substances to achieve the purpose of dust removal and desulfurization. However, the device has a complex structure, increasing the equipment investment. At the same time, the complex internal structure greatly increases the workload of later cleaning and regeneration of the absorption plates. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sulfur-containing tail gas absorption and treatment device to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides a sulfur-containing tail gas absorption and treatment device, which includes a device main body with legs at the bottom. A circulating spraying component is installed at the top of the inner cavity of the device main body. The lower end of the circulating spraying component is communicated with the bottom of the inner cavity of the device main body. An absorption component is installed on the inner wall of the device main body. The absorption component includes an installation box. A dispersion component is fixedly connected to the lower end face of the installation box. A particle filler is filled in the closed area surrounded by the installation box and the dispersion component.

[0007] As a further preference, the device main body includes an absorption box. An air outlet end is fixedly connected to the top of the absorption box. An air inlet end is fixedly connected to the lower end of the side wall of the absorption box. A cleaning and sewage pipe is fixedly connected to the bottom of the absorption box. A limiting groove is opened on the inner wall of the absorption box.

[0008] As a further preference, the circulating spray assembly includes a water pump. The feed end of the water pump is communicated with the lower end of the inner cavity of the absorption tank. The discharge end of the water pump is fixedly connected with a return pipe. One end of the return pipe away from the water pump extends to the upper end of the inner cavity of the absorption tank and is fixedly connected with a spray head group.

[0009] As a further preference, the installation box is slidably connected in the limit groove, and a plurality of groups of elastic components are fixedly connected at intervals on the edge of the upper end surface of the installation box. One side of the plurality of groups of elastic components away from the installation box is fixedly connected to the top of the limit groove.

[0010] As a further preference, the dispersion assembly includes a flexible film. The edge of the flexible film is fixedly connected to the lower end surface of the installation box, and a plurality of groups of cross cuts are circumferentially arrayed on the upper end surface of the flexible film.

[0011] As a further preference, the granular filler is a plurality of porous particles with different diameters.

[0012] By the above technical solutions, the sulfur-containing tail gas absorption and treatment device provided by the present utility model has the following advantages:

[0013] In the present utility model, by arranging the absorption assembly, the tail gas passes through the flexible film from the lower end of the flexible film and is dispersed into the granular filler through the flexible film. The absorbent solution is sprayed from the circulating spray assembly through the installation box and contacts the tail gas attached in the granular filler. The granular filler with a porous structure greatly prolongs the contact time between the tail gas and the absorbent solution, improves the absorption rate of sulfides. At the same time, the impermeable flexible film makes the sprayed absorbent solution form a water film on the upper end surface of the flexible film, further increasing the passing time of the tail gas and adsorbing solid impurities in the tail gas.

[0014] At the same time, the absorbent solution sprayed from the top flushes the installation box and the granular filler, preventing solid impurities from accumulating outside the granular filler and affecting the dispersion effect of the granular filler on the air flow. The liquid accumulated on the upper end of the flexible film falls to the bottom of the inner cavity of the absorption tank under the action of gravity through the cross cuts, preventing solid impurities from adhering in the cross cuts and affecting the gas flow, thereby prolonging the effective service life of the absorption assembly and reducing the cleaning and replacement times of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a sulfur-containing tail gas absorption and treatment device of the present utility model.

[0016] Figure 2 is a partially sectional structural diagram of the device of the present utility model

[0017] Figure 3 is a partially sectional structural diagram of the main body of the device of the present utility model.

[0018] Figure 4 This is a partially sectional structural schematic diagram of the absorption component of the present utility model.

[0019] Figure 5 This is a structural schematic diagram of the dispersion component of the present utility model.

[0020] In the figure: 1 device main body, 11 air outlet end, 12 absorption tank, 13 cleaning pipe, 14 air inlet end, 15 limit groove, 2 circulating spray component, 21 water pump, 22 return pipe, 23 spray head group, 3 absorption component, 31 elastic component, 32 installation box, 33 dispersion component, 331 flexible film, 332 cross cutting edge, 34 particle filler. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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.

[0022] The present utility model will be further described in detail in conjunction with the accompanying drawings.

[0023] Please refer to Figure 1 - Figure 5 , a sulfur-containing tail gas absorption and treatment device provided by the present utility model, including a device main body 1, a circulating spray component 2 and an absorption component 3.

[0024] Please refer to Figures 1 to 3 , the device main body 1 includes an absorption tank 12, the top of the absorption tank 12 is fixedly connected with an air outlet end 11, the lower end of the side wall of the absorption tank 12 is fixedly connected with an air inlet end 14, the bottom of the absorption tank 12 is fixedly connected with a cleaning pipe 13, a limit groove 15 is opened on the inner wall of the absorption tank 12, the circulating spray component 2 includes a water pump 21, the water pump 21 is installed at the lower end of the outer wall of the absorption tank 12 and the feeding end is communicated with the inner cavity of the absorption tank 12, the discharging end of the water pump 21 is fixedly connected with a return pipe 22, the return pipe 22 penetrates through the outer wall of the absorption tank 12 and extends to the upper end of the inner cavity of the absorption tank 12 and is fixedly connected with a spray head group 23, the water pump 21 pumps the absorbent solution at the bottom of the absorption tank 12 to the top of the absorption tank 12 through the return pipe 22, and then sprays it into the inner cavity of the absorption tank 12 by the spray head group 23. The absorption component 3 is installed in the limit groove 15. The sulfur-containing tail gas enters the inner cavity of the absorption tank 12 through the air inlet end 14, contacts with the absorbent solution when passing through the absorption component 3, absorbs and adsorbs sulfides and solid impurities, and finally is discharged through the air outlet end 11.

[0025] It should be added that a filter screen is fixedly connected at the connection between the feeding end of the water pump 21 and the absorption tank 12 to prevent solid impurities from entering the water pump 21 and causing pipeline blockage.

[0026] Please refer to Figure 4 and Figure 5 , the absorption component 3 includes an installation box 32. A number of groups of elastic components 31 are fixedly connected to the upper end surface of the installation box 32 at intervals. One end of the elastic component 31 away from the installation box 32 is fixedly connected to the top of the limiting groove 15. A dispersion component 33 is fixedly connected to the lower end surface of the installation box 32. A granular filler 34 is filled in the area surrounded by the installation box 32 and the dispersion component 33.

[0027] It should be added that the granular filler 34 is porous particulate matter with different diameters.

[0028] It should also be added that the outer diameter of the installation box 32 is equal to the outer diameter of the limiting groove 15. The installation box 32 moves smoothly without friction in the limiting groove 15, and the edge of the installation box 32 is kept sealed with the limiting groove 15 during the movement.

[0029] That is to say, the tail gas is dispersed into the granular filler 34 by the dispersion component 33 and then passes through the installation box 32 and exits. When the air flow velocity is relatively large, the dispersion component 33 pushes the installation box 32 to compress the elastic component 31 and move upward along the limiting groove 15 to buffer the air flow, so as to avoid the air flow being too large and directly overflowing without sufficient contact with the absorbent solution. At the same time, when the spraying amount is too large, the solution pushes the dispersion component 33 to make the installation box 32 stretch the elastic component 31 and move downward along the limiting groove 15 to reduce the impact of the instantaneous flow rate on the granular filler 34. During cleaning, the absorbent solution can be replaced with a cleaning agent solution, and by adjusting the spraying amount, the installation box 32 stretches the elastic component 31 to move up and down, so as to promote the detachment of the attached solid impurities on the installation box 32, the granular filler 34 and the dispersion component 33 and improve the cleanliness.

[0030] Specifically, the dispersion component 33 includes a flexible film 331. A number of groups of cross cuts 332 are arranged at intervals on the upper end surface of the flexible film 331 in an array.

[0031] It should be added that the top of the installation box 32 is a mesh sieve to facilitate the flow of gas and solution, and the side of the installation box 32 is a baffle to facilitate the formation of a water film on the upper end surface of the flexible film 331.

[0032] It can be understood that when the exhaust gas flow blows from the bottom to the flexible membrane 331, it pushes the installation box 32 to compress the elastic component 31 and move upward along the limit groove 15 to buffer the airflow, avoid excessive airflow velocity and short contact time with the absorbent solution, resulting in a reduced desulfurization rate. At the same time, the gas opens the cross edge 332 and disperses from the cross edge 332 to the particle filler 34, thereby increasing the dispersion rate of the exhaust gas. The dispersed exhaust gas is absorbed and blocked by the particle filler 34, which greatly increases the residence time of the gas in the installation box 32. The absorbent solution sprayed from above passes through the top of the installation box 32 and enters the particle filler 34, and is dispersed again through the particle filler 34, which greatly increases the contact area and contact time with the exhaust gas, thereby further increasing the absorption rate of sulfide in the exhaust gas. At the same time, part of the sprayed solution remains on the upper end surface of the flexible membrane 331 to form a water film, which reduces the exhaust gas penetration speed while adsorbing solid impurities in the exhaust gas, thereby improving the cleanliness of the exhaust gas treatment.

[0033] Principle: First, inject the absorbent solution into the bottom of the inner cavity of the absorption box 12, then pass the sulfur-containing tail gas into the inner cavity of the absorption box 12 from the air inlet end 14, the water pump 21 works to pump out the absorbent solution and transport it to the upper end of the inner cavity of the absorption box 12 through the reflux pipe 22, and finally spray it into the absorption box 12 through the nozzle group 23. The sulfur-containing tail gas is dispersed into the particle filler 34 through the cross blade 332, absorbed by the particle filler 34, and contacts with the absorbent solution under the top spray to absorb the sulfide. At the same time, the water film formed on the upper end surface of the flexible membrane 331 further prolongs the residence time of the tail gas in the installation box 32, and adsorbs the solid impurities in the tail gas, thereby improving the cleanliness of the tail gas treatment. The sprayed absorbent solution is sprayed on the installation box 32 and the particle filler 34. Flushing is performed to reduce the attachment of solid impurities on the particle filler 34 and extend the effective service life of the particle filler 34. At the same time, after the water film thickness on the upper end surface of the flexible membrane 331 accumulates to a certain thickness, it passes through the flexible membrane 331 due to gravity and falls to the bottom of the inner cavity of the absorption box 12, and the cross blade 332 is flushed to prevent the cross blade 332 from being blocked by solid impurities and affecting the normal circulation of the exhaust gas. The absorbent solution accumulated at the bottom of the inner cavity of the absorption box 12 is circulated to the nozzle group 23 by the water pump 21 and sprayed again. The exhaust gas after absorption and treatment is discharged through the outlet end 11. After a period of treatment, the cleaning pipe 13 can be opened to discharge the solid matter deposited at the bottom, and the saturated absorbent solution can also be discharged, which is convenient for replacing a new absorbent solution.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur-containing tail gas absorption and treatment device, comprising a device body (1) with legs at the bottom, characterized in that: A circulating spray assembly (2) is installed at the top of the inner cavity of the device body (1), and the lower end of the circulating spray assembly (2) is connected to the bottom of the inner cavity of the device body (1). An absorption assembly (3) is installed on the inner wall of the device body (1), and the absorption assembly (3) comprises an installation box (32). A dispersion assembly (33) is fixedly connected to the lower end surface of the installation box (32), and a closed area enclosed by the installation box (32) and the dispersion assembly (33) is filled with a granular filler (34).

2. The sulfur-containing tail gas absorption treatment device according to claim 1, characterized in that: The device body (1) comprises an absorption box (12), the top of the absorption box (12) is fixedly connected to an air outlet (11), the lower end of the side wall of the absorption box (12) is fixedly connected to an air inlet (14), the bottom of the absorption box (12) is fixedly connected to a sewage cleaning pipe (13), and the inner wall of the absorption box (12) is provided with a limiting groove (15).

3. A sulfur-containing tail gas absorption treatment device according to claim 2, characterized in that: The circulating spray assembly (2) comprises a water pump (21), the feed end of the water pump (21) is connected to the lower end of the inner cavity of the absorption box (12), the discharge end of the water pump (21) is fixedly connected to a return pipe (22), and the end of the return pipe (22) facing away from the water pump (21) extends to the upper end of the inner cavity of the absorption box (12) and is fixedly connected to a nozzle group (23).

4. A sulfur-containing tail gas absorption treatment device according to claim 3, characterized in that: The installation box (32) is slidably connected in the limiting groove (15), and a plurality of groups of elastic components (31) are fixedly connected at intervals to the edge of the upper end surface of the installation box (32), and a plurality of groups of the elastic components (31) are fixedly connected to the top of the limiting groove (15) on a side facing away from the installation box (32).

5. The sulfur-containing tail gas absorption treatment device according to claim 4 is characterized in that: The dispersion component (33) comprises a flexible membrane (331), the edge of which is fixedly connected to the lower end surface of the installation box (32), and the upper end surface of the flexible membrane (331) is provided with a plurality of groups of cross blades (332) in a circumferential array.

6. The sulfur-containing tail gas absorption treatment device according to claim 4 is characterized in that: The particle filler (34) is a plurality of porous particles with different diameters.

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