Absorption device for tail gas containing hydrogen sulfide

Abstract

The utility model discloses an absorption device for tail gas containing hydrogen sulfide, which comprises a tail gas buffer tank, the tail gas buffer tank is connected with a primary purification tower, the side wall of the primary purification tower is provided with an absorption liquid storage tank, the bottom of the primary purification tower is provided with a first collecting tank, the primary purification tower is connected with an efficient purification tower, and the efficient purification tower is connected with a second collecting tank. A purification liquid storage tank is arranged on the side wall of the efficient purification tower, a recirculation fan is arranged in the efficient purification tower, and a second collection tank is arranged at the bottom of the efficient purification tower. By means of the structure, the spraying device and the first packing layer are arranged in the primary purification tower, tail gas makes full contact with absorption liquid, the first collecting tank is provided with the separating device, the separating device is connected with a waste liquid discharging pipeline and a substance collecting pipeline, the liquid sealing device is arranged above the recirculation fan, and the deep purification device is arranged on the liquid sealing device. And harmful components in the tail gas are further removed to reach the emission standard.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas absorption, in particular to an absorption device for tail gas containing hydrogen sulfide. Background Art

[0002] Hydrogen sulfide (H2S) is a colorless gas that is irritating and asphyxiating. It can cause serious damage to the human body. Exhaust gas containing hydrogen sulfide is produced in many industrial fields. The emission of exhaust gas containing hydrogen sulfide is necessary, and the consequences of large-scale emission of exhaust gas containing hydrogen sulfide are very serious. Therefore, a device for absorbing exhaust gas containing hydrogen sulfide is needed.

[0003] When using an absorption device for exhaust gas containing hydrogen sulfide, the existing technology has a relatively simple device structure and limited treatment effect. With the promotion of energy-saving and environmental protection concepts, emission standards are becoming more and more stringent, and the desired effect cannot be achieved. Utility Model Content

[0004] The purpose of this utility model is to provide an absorption device for tail gas containing hydrogen sulfide, so that the hydrogen sulfide in the tail gas can be fully absorbed and converted, so as to realize resource recycling and strictly control tail gas emissions in accordance with emission standards. The entire design focuses on environmental protection and energy saving.

[0005] In order to achieve the above-mentioned purpose, an absorption device for exhaust gas containing hydrogen sulfide is provided, comprising an exhaust gas buffer tank, wherein the exhaust gas buffer tank is connected to a primary purification tower, an absorption liquid storage tank is provided on the side wall of the primary purification tower, a first collecting tank is provided at the bottom of the primary purification tower, the primary purification tower is connected to a high-efficiency purification tower, a purification liquid storage tank is provided on the side wall of the high-efficiency purification tower, a recirculation fan is provided inside the high-efficiency purification tower, and a second collecting tank is provided at the bottom of the high-efficiency purification tower.

[0006] According to the device for absorbing hydrogen sulfide-containing tail gas, a dust removal device is provided at the input pipe of the tail gas buffer tank, and a cooling device is provided at the output end of the tail gas buffer tank.

[0007] According to the absorption device for exhaust gas containing hydrogen sulfide, the absorption liquid storage tank is connected to the spraying device inside the primary purification tower, a first packing layer is provided at the lower end of the spraying device, a support plate is fixed at the lower end of the first packing layer, the support plate is fixed to the bottom of the primary purification tower, and a demister is provided at the upper outlet of the primary purification tower.

[0008] According to the device for absorbing hydrogen sulfide-containing tail gas, a separation device is provided at the bottom of the first collecting tank, a waste liquid discharge pipe is connected to the side of the separation device, and the upper end of the separation device is connected to the material collection pipe.

[0009] According to the absorption device for tail gas containing hydrogen sulfide, the purified liquid storage tank is connected to the multi-layer spray system in the high-efficiency purification tower, a liquid sealing device is provided above the multi-layer spray system, a deep purification device is provided above the liquid sealing device, and the deep purification device is provided at the outlet of the high-efficiency purification tower.

[0010] According to the device for absorbing hydrogen sulfide-containing tail gas, a monitoring device is provided below the recirculation fan, and a connecting pipe at the output end of the recirculation fan is provided at the bottom of the high-efficiency purification tower.

[0011] According to the absorption device for exhaust gas containing hydrogen sulfide, a filter is provided at one end of the second collection tank, a circulation pump is provided in the filter output pipe, the filter output pipe is connected to the purified liquid storage tank, a stainless steel mesh is provided above the second collection tank, and a second packing layer is fixed above the stainless steel mesh.

[0012] According to the device for absorbing tail gas containing hydrogen sulfide, a safety valve is provided on the side wall of the tail gas buffer tank.

[0013] Beneficial effects:

[0014] 1. Utilize the primary purification tower and high-efficiency purification tower for multi-stage treatment. The spray device in the primary purification tower is combined with the first packing layer to increase the absorption area and efficiency. The multi-layer spray system, liquid seal device and deep purification device in the high-efficiency purification tower further purify the tail gas after primary purification, and realize the deep purification treatment of hydrogen sulfide in the tail gas.

[0015] 2. A monitoring device is installed inside the high-efficiency purification tower to monitor the exhaust gas status and combine it with the recirculation fan to strictly control the outflow of unqualified exhaust gas to ensure that the emission meets the standards. The collection tank of the high-efficiency purification tower is equipped with a circulation pump and filter to return the purified liquid to the purified liquid storage tank for reuse by the multi-layer spray system, which helps to save energy and reduce emissions.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional diagram of an absorption device for tail gas containing hydrogen sulfide proposed by the present invention;

[0019] Figure 2 This is a schematic structural diagram of a tail gas buffer tank in a device for absorbing tail gas containing hydrogen sulfide proposed in the present invention;

[0020] Figure 3The utility model provides a structural schematic diagram of a primary purification tower in an absorption device for tail gas containing hydrogen sulfide;

[0021] Figure 4 The utility model provides a structural schematic diagram of a high-efficiency purification tower in an absorption device for tail gas containing hydrogen sulfide.

[0022] Legend:

[0023] 1. Exhaust buffer tank; 2. Safety valve; 3. High-efficiency purification tower; 4. Purification liquid storage tank; 5. Primary purification tower; 6. Absorption liquid storage tank; 7. Cooling device; 8. Dust removal device; 9. Spraying device; 10. Support plate; 11. First collection tank; 12. Separation device; 13. Waste liquid discharge pipe; 14. Material collection pipe; 15. First packing layer; 16. Demister; 17. Second collection tank; 18. Stainless steel mesh; 19. Multi-layer spraying system; 20. Monitoring device; 21. Liquid sealing device; 22. Deep purification device; 23. Recirculation fan; 24. Second packing layer; 25. Circulation pump; 26. Filter. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] Reference Figure 1-4 The embodiment of the utility model is an absorption device for exhaust gas containing hydrogen sulfide, which includes an exhaust buffer tank 1, the exhaust buffer tank 1 is connected to the primary purification tower 5, the side wall of the primary purification tower 5 is provided with an absorption liquid storage tank 6, the bottom of the primary purification tower 5 is provided with a first collecting tank 11, the primary purification tower 5 is connected to the high-efficiency purification tower 3, the side wall of the high-efficiency purification tower 3 is provided with a purification liquid storage tank 4, the inside of the high-efficiency purification tower 3 is provided with a recirculation fan 23, and the bottom of the high-efficiency purification tower 3 is provided with a second collecting tank 17.

[0026] A dust removal device 8 is provided at the input pipe of the tail gas buffer tank 1, and the dust removal device 8 is used to remove solid particles in the tail gas. A cooling device 7 is provided at the output end of the tail gas buffer tank 1, and the cooling device 7 reduces the tail gas temperature and improves the subsequent absorption efficiency.

[0027] The absorption liquid storage tank 6 is connected to the spray device 9 inside the primary purification tower 5. A first packing layer 15 is provided at the lower end of the spray device 9. The first packing layer 15 increases the contact area and time between the exhaust gas and the spray liquid. A support plate 10 is fixed to the lower end of the first packing layer 15. The support plate 10 is fixed to the bottom of the primary purification tower 5. A demister 16 is provided at the upper outlet of the primary purification tower 5. The demister 16 removes liquid droplets entrained in the exhaust gas to prevent it from entering subsequent equipment.

[0028] A separation device 12 is provided at the bottom of the first collecting tank 11 . A waste liquid discharge pipe 13 is connected to the side of the separation device 12 . The upper end of the separation device 12 is connected to a material collection pipe 14 .

[0029] The purified liquid storage tank 4 is connected to the multi-layer spray system 19 in the high-efficiency purification tower 3. A liquid sealing device 21 is provided above the multi-layer spray system 19. A deep purification device 22 is provided above the liquid sealing device 21. The deep purification device 22 is provided at the outlet of the high-efficiency purification tower 3.

[0030] A monitoring device 20 is provided below the recirculation fan 23. The monitoring device 20 monitors the exhaust gas condition and provides information for the operation of the recirculation fan 23. The output end connecting pipe of the recirculation fan 23 is provided at the bottom of the high-efficiency purification tower 3. The recirculation fan 23 promotes the circulation and mixing of the exhaust gas in the high-efficiency purification tower 3.

[0031] A filter 26 is provided at one end of the second collecting tank 17 , a circulating pump 25 is provided in the output pipe of the filter 26 , and the output pipe of the filter 26 is connected to the purified liquid storage tank 4 . A stainless steel mesh 18 is provided above the second collecting tank 17 , and a second packing layer 24 is fixed above the stainless steel mesh 18 .

[0032] A safety valve 2 is provided on the side wall of the tail gas buffer tank 1. The safety valve 2 automatically opens to release the pressure when the pressure inside the tank exceeds a set value.

[0033] Working principle: The tail gas containing hydrogen sulfide enters the tail gas buffer tank 1, and the solid particles are removed by the dust removal device 8. The tail gas temperature is then lowered by the cooling device 7 and transported to the middle of the primary purification tower 5. The outer wall of the tail gas buffer tank 1 is provided with a safety valve 2. The absorption liquid storage tank 6 fixed on the outer wall of the primary purification tower 5 is connected to the internal spraying device 9. The absorption liquid sprayed in the tail gas tower reacts, and the first packing layer 15 receives the sprayed absorption liquid to increase the absorption area and efficiency of the tail gas. A support plate 10 is fixed at the bottom of the first packing layer 15, and the support plate 10 is connected to the first collecting tank 11. A separation device 12 is provided in the first collecting tank 11. The separation device 12 processes the collected liquid and transports it separately by the waste liquid discharge pipe 13 and the material collection pipe 14. The tail gas containing hydrogen sulfide passes through the primary purification tower 5. After the first step of absorption, it is discharged through the demister 16 at the top of the primary purification tower 5, and then transported to the high-efficiency purification tower 3 by the pipeline. After being processed by the multi-layer spray system 19 and the second packing layer 24, the tail gas rises and passes through the monitoring device 20. If the tail gas is unqualified, it will be transported back to the bottom of the high-efficiency purification tower 3 by the recycling fan 23 for reprocessing. After passing the test, it will pass through the liquid sealing device 21 and the deep purification device 22 to further purify the tail gas to ensure that the tail gas emission meets the standard. A stainless steel mesh 18 is provided above the second collection tank 17 to fix the second packing layer 24, and a filter 26 is provided inside the second collection tank 17. The filtered purified liquid is transported to the purified liquid storage tank 4 fixed on the outer wall of the high-efficiency purification tower 3 by the circulation pump 25 for recycling use in the multi-layer spray system 19.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A device for absorbing tail gas containing hydrogen sulfide, comprising a tail gas buffer tank (1), characterized in that: The tail gas buffer tank (1) is connected to a primary purification tower (5), a side wall of the primary purification tower (5) is provided with an absorption liquid storage tank (6), a bottom of the primary purification tower (5) is provided with a first collecting tank (11), the primary purification tower (5) is connected to a high-efficiency purification tower (3), a side wall of the high-efficiency purification tower (3) is provided with a purification liquid storage tank (4), a recirculation fan (23) is provided inside the high-efficiency purification tower (3), and a second collecting tank (17) is provided at the bottom of the high-efficiency purification tower (3).

2. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: The input pipe of the tail gas buffer tank (1) is provided with a dust removal device (8), and the output end of the tail gas buffer tank (1) is provided with a cooling device (7).

3. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: The absorption liquid storage tank (6) is connected to a spray device (9) inside a primary purification tower (5); a first packing layer (15) is provided at the lower end of the spray device (9); a support plate (10) is fixed to the lower end of the first packing layer (15); the support plate (10) is fixed to the bottom of the primary purification tower (5); and a demister (16) is provided at the upper outlet of the primary purification tower (5).

4. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: A separation device (12) is provided at the bottom of the first collecting tank (11), a waste liquid discharge pipe (13) is connected to the side of the separation device (12), and the upper end of the separation device (12) is connected to a material collection pipe (14).

5. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: The purified liquid storage tank (4) is connected to a multi-layer spraying system (19) in a high-efficiency purification tower (3); a liquid sealing device (21) is provided above the multi-layer spraying system (19); a deep purification device (22) is provided above the liquid sealing device (21); and the deep purification device (22) is provided at the outlet of the high-efficiency purification tower (3).

6. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: A monitoring device (20) is provided below the recirculation fan (23), and a connecting pipe at the output end of the recirculation fan (23) is provided at the bottom of the high-efficiency purification tower (3).

7. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: A filter (26) is provided at one end of the second collecting tank (17), a circulating pump (25) is provided on an output pipe of the filter (26), and the output pipe of the filter (26) is connected to a purified liquid storage tank (4). A stainless steel mesh (18) is provided above the second collecting tank (17), and a second packing layer (24) is fixed above the stainless steel mesh (18).

8. The device for absorbing tail gas containing hydrogen sulfide according to claim 1, characterized in that: A safety valve (2) is provided on the side wall of the tail gas buffer tank (1).

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