Alkali-washed tail gas absorption device

Abstract

The utility model discloses an alkali-washed tail gas absorption device which comprises a tail gas pipeline, a tail gas valve is arranged on the top of the tail gas pipeline close to the edge of one end, one end of the tail gas pipeline is connected with a condenser, and the center line of the bottom of the condenser is communicated with a backflow pipeline. A sight glass is embedded in the center of the front surface of the backflow pipeline, a backflow valve is arranged at the position, close to the bottom of the sight glass, of the outer surface of one side of the backflow pipeline, the bottom end of the backflow pipeline is connected with a recycling tank, and the position, close to the top edge, of the outer surface of one side of the backflow pipeline communicates with a gas conveying pipe; and one end of the gas conveying pipe is connected with a filter box. According to the utility model, the gas generated after alkali washing flows through the condenser, so that material residues in the gas can be better liquefied to generate liquid, and the liquid flows back to the inside of the recovery tank through the return pipe, thereby greatly reducing the volatilization of bromoalkane, improving the efficiency and improving the environment.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas absorption devices, and in particular to an exhaust gas absorption device after alkaline washing. Background Technology

[0002] After the bromination reaction, the reaction vessel needs to be washed with alkali to clean it, so that it will not affect the reaction in the next reaction.

[0003] In existing methods, alkaline washing of the reactor generates gas, which is directly connected to the tail gas treatment system. This gas carries away a large amount of raw material residue, resulting in material waste and increased production costs. Furthermore, when absorbing the gas after alkaline washing, activated carbon is currently placed directly inside the tail gas treatment device. When the activated carbon loses its effectiveness, it needs to be replaced, which is extremely difficult and adds a significant amount of time for workers. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tail gas absorption device after alkaline washing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tail gas absorption device after alkaline washing, comprising a tail gas pipe, a tail gas valve provided at the top edge of the tail gas pipe near one end, a condenser connected to one end of the tail gas pipe, a return pipe connected to the bottom centerline of the condenser, a sight glass embedded at the center of the front surface of the return pipe, a return valve provided at the bottom of one side outer surface of the return pipe near the sight glass, a recovery tank connected to the bottom end of the return pipe, a gas delivery pipe connected to one side outer surface of the return pipe near the top edge, a filter box connected to one end of the gas delivery pipe, the filter box being a hollow structure, and two notches provided on both sides of the top of the filter box near the center, wherein an activated carbon frame is slidably embedded in the inner wall of one notch, and a purification filter screen is slidably embedded in the inner wall of the other notch, and a chimney is connected to the top of the filter box near a corner.

[0006] As a further description of the above technical solution:

[0007] An acid tank is fixed at the center of the bottom surface of the filter box, and a first acid pipe is connected to the center of the bottom of the acid tank, with one end of the first acid pipe extending to the outside of the filter box.

[0008] As a further description of the above technical solution:

[0009] A spray head is fixed at the center of the top surface inside the filter box, and a second acid pipe is connected to the center of the top of the spray head. One end of the second acid pipe extends to the outside of the filter box, and an acid valve is provided on one side of the outer surface of the second acid pipe near one edge.

[0010] As a further description of the above technical solution:

[0011] A fixing plate is fixed horizontally at the center of one side of the outer surface of the filter box, and a circulation pump is fixed at the top center of the fixing plate.

[0012] As a further description of the above technical solution:

[0013] The top center of the circulation pump is connected to one end of the second acid pipe, and the bottom center of the circulation pump is connected to one end of the first acid pipe.

[0014] As a further description of the above technical solution:

[0015] Both the activated carbon frame and the purification filter are fixed with handles at the top center, and sealing strips are affixed to the connection between the activated carbon frame and the purification filter and the recess.

[0016] As a further description of the above technical solution:

[0017] The activated carbon frame contains solid activated carbon, and multiple gas pores are opened on both outer surfaces of the activated carbon frame in the horizontal direction.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. In this utility model, by passing the gas generated after alkaline washing through a condenser, the material residue in the gas can be better liquefied to produce liquid, which is then returned to the inside of the recovery tank through a return pipe, thereby greatly reducing the volatilization of bromoalkane, improving efficiency, and improving the environment.

[0020] 2: In this utility model, by opening a notch at the top of the filter box and slidingly embedding an activated carbon frame inside the notch, when the activated carbon loses its effectiveness, the activated carbon frame can be easily removed by pulling the handle, thus making it easier to replace the activated carbon and greatly reducing the workload of the workers. At the same time, a sealing strip is attached to the connection between the notch and the activated carbon frame, which can better filter the gas. Attached Figure Description

[0021] Figure 1 This is a front view of a tail gas absorption device after alkaline washing proposed in this utility model;

[0022] Figure 2 This is a top view of the filter box of an alkaline-washed tail gas absorption device proposed in this utility model.

[0023] Figure 3 This is a partial cross-sectional view of the filter box of an alkaline-washed exhaust gas absorption device proposed in this utility model.

[0024] In the diagram: 1. Exhaust gas valve; 2. Exhaust gas pipe; 3. Condenser; 4. Gas delivery pipe; 5. Activated carbon frame; 6. Notch; 7. Spray head; 8. Filter box; 9. Purification filter screen; 10. Chimney; 11. Acid tank; 12. Return valve; 13. Recovery tank; 14. Sight glass; 15. Return pipe; 16. Second acid pipe; 17. Handle; 18. Acid valve; 19. Circulation pump; 20. Fixing plate; 21. First acid pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1-3This utility model provides an embodiment of an alkaline scrubbing tail gas absorption device, comprising a tail gas pipe 2, a tail gas valve 1 disposed near one end edge of the top of the tail gas pipe 2, a condenser 3 connected to one end of the tail gas pipe 2, a return pipe 15 connected to the bottom centerline of the condenser 3, a sight glass 14 embedded in the center of the front surface of the return pipe 15, a return valve 12 disposed near the bottom of the sight glass 14 on one side outer surface of the return pipe 15, a recovery tank 13 connected to the bottom end of the return pipe 15, a gas delivery pipe 4 connected to the top edge of one side outer surface of the return pipe 15, a filter box 8 connected to one end of the gas delivery pipe 4, the filter box 8 being a hollow structure, and two notches 6 being provided on both sides near the center of the top of the filter box 8, wherein an activated carbon material is slidably embedded in the inner wall of one notch 6. The inner wall of the carbon frame 5 and another recess 6 is fitted with a purification filter screen 9. The top of the filter box 8 is connected to a chimney 10 near a corner. The gas generated after alkaline washing flows through the condenser 3, which can better liquefy the material residue in the gas and produce liquid. The liquid is returned to the inside of the recovery tank 13 through the return pipe 15, which greatly reduces the volatilization of bromoalkane, improves efficiency, and improves the environment. By opening a recess 6 at the top of the filter box 8 and slidingly embedding the activated carbon frame 5 inside the recess 6, the activated carbon frame 5 can be easily removed by pulling the handle 17 when the activated carbon loses its effectiveness, which can facilitate the replacement of activated carbon and greatly reduce the workload of workers. At the same time, a sealing strip is attached to the connection between the recess 6 and the activated carbon frame 5 to better filter the gas.

[0027] An acid tank 11 is fixed at the center of the bottom surface inside the filter box 8, and a first acid pipe 21 is connected to the center of the bottom of the acid tank 11. One end of the first acid pipe 21 extends to the outside of the filter box 8. A spray head 7 is fixed at the center of the top surface inside the filter box 8, and a second acid pipe 16 is connected to the center of the top of the spray head 7. One end of the second acid pipe 16 extends to the outside of the filter box 8. An acid valve 18 is provided on one side of the outer surface of the second acid pipe 16 near one edge. A fixing plate 20 is fixed horizontally at the center of one side of the outer surface of the filter box 8, and a circulation pump 19 is fixed at the center of the top of the fixing plate 20. The center of the top of the circulation pump 19 is connected to one end of the second acid pipe 16, and the center of the bottom of the circulation pump 19 is connected to the center of the second acid pipe 16. One end of the acid tank 11 is connected to the first acid pipe 21. Through the circulation pump 19, the acid in the acid tank 11 can be better extracted, so that the acid can flow through the first acid pipe 21 and the second acid pipe 16 and be sprayed through the spray head 7. This can better react with the alkaline gas to form an acid-base neutralization reaction and better treat the tail gas after alkaline washing. The activated carbon frame 5 and the purification filter screen 9 are both fixed with handles 17 at the top center. The connection between the activated carbon frame 5 and the purification filter screen 9 and the notch 6 is covered with sealing strips. The activated carbon frame 5 is filled with solid activated carbon. Multiple gas holes are opened on the outer surfaces of both sides of the activated carbon frame 5 in the horizontal direction, which can better allow the gas to flow through the activated carbon frame 5 and better filter the gas.

[0028] Working principle: When the worker absorbs the exhaust gas after alkaline washing, it enters the condenser 3 through the exhaust gas pipe 2. The exhaust gas valve 1 is used to control the gas flow rate, allowing the gas to flow better through the condenser 3. The return valve 12 is closed for a while, and the sight glass 14 is used to observe whether there is liquid outflow. After liquid outflow, the return valve 12 is opened to better recover the liquid into the recovery tank 13, which can better recycle the liquid raw material residue. The exhaust gas is sent to the filter box 8 through the gas delivery pipe 4. The activated carbon inside the activated carbon frame 5 absorbs the gas. The acid spray can better neutralize the alkaline gas. The gas is then filtered through the purification filter screen 9. The filtered gas enters the atmosphere through the chimney 10. The circulating pump 19 can better recycle the acid. The filtered gas enters the atmosphere through the chimney 10, which can better absorb the exhaust gas after alkaline washing.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tail gas absorption device after alkaline washing, comprising a tail gas pipe (2), characterized in that: An exhaust valve (1) is provided at the top of the exhaust pipe (2) near one end edge. One end of the exhaust pipe (2) is connected to a condenser (3). A return pipe (15) is connected to the bottom centerline of the condenser (3). A sight glass (14) is embedded at the center of the front surface of the return pipe (15). A return valve (12) is provided on the bottom of one side of the outer surface of the return pipe (15) near the sight glass (14). A recovery tank (13) is connected to the bottom end of the return pipe (15). A gas delivery pipe (4) is connected to the top edge of the surface. One end of the gas delivery pipe (4) is connected to a filter box (8). The filter box (8) is a hollow structure. The top of the filter box (8) has two notches (6) on both sides near the center. There are two notches (6). The inner wall of one notch (6) is fitted with an activated carbon frame (5), and the inner wall of the other notch (6) is fitted with a purification filter screen (9). The top of the filter box (8) is connected to a chimney (10) near a corner.

2. The tail gas absorption device after alkaline washing according to claim 1, characterized in that: An acid tank (11) is fixed at the center of the bottom surface inside the filter box (8), and a first acid pipe (21) is connected to the center of the bottom of the acid tank (11), and one end of the first acid pipe (21) extends to the outside of the filter box (8).

3. The tail gas absorption device after alkaline washing according to claim 1, characterized in that: A spray head (7) is fixed at the center of the top surface inside the filter box (8), and a second acid pipe (16) is connected to the center of the top of the spray head (7). One end of the second acid pipe (16) extends to the outside of the filter box (8), and an acid valve (18) is provided on one side of the outer surface of the second acid pipe (16) near one edge.

4. The tail gas absorption device after alkaline washing according to claim 1, characterized in that: A fixing plate (20) is fixed horizontally at the center of one side of the outer surface of the filter box (8), and a circulation pump (19) is fixed at the center of the top of the fixing plate (20).

5. The tail gas absorption device after alkaline washing according to claim 4, characterized in that: The top center of the circulating pump (19) is connected to one end of the second acid pipe (16), and the bottom center of the circulating pump (19) is connected to one end of the first acid pipe (21).

6. The tail gas absorption device after alkaline washing according to claim 1, characterized in that: A handle (17) is fixed at the top center of both the activated carbon frame (5) and the purification filter (9), and a sealing strip is attached to the connection between the activated carbon frame (5) and the purification filter (9) and the notch (6).

7. The tail gas absorption device after alkaline washing according to claim 1, characterized in that: The activated carbon frame (5) is provided with solid activated carbon inside, and multiple gas holes are opened on both sides of the outer surface of the activated carbon frame (5) in the horizontal direction.

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