Bromine extraction absorption tower

Abstract

The invention belongs to the technical field of bromine absorption, and particularly relates to a bromine extraction absorption tower which comprises a solvent box, a circulating pump set and an air inducing assembly, a tower body is arranged at the top of the solvent box and comprises an upper barrel and a lower barrel which are sequentially communicated from top to bottom, a spraying absorption assembly is arranged in the upper barrel, an inner barrel is arranged in the lower barrel in a sleeved mode, and the upper barrel and the lower barrel are communicated through the air inducing assembly. The upper half section of the inner cylinder is provided with a plurality of groups of gas overflow ports distributed in a surrounding manner, a gas dissolving cavity is formed between the outer wall of the inner cylinder and the inner wall of the lower cylinder body, one side of the outer wall of the lower cylinder body is provided with a gas inlet communicated with the gas dissolving cavity, the outer wall of the lower cylinder body is provided with a plurality of groups of mounting ports distributed in a surrounding manner and communicated with the gas dissolving cavity, and the mounting ports are provided with lateral stirrers. The gas dissolving cavity enables gas to be in full contact with a solvent when the gas passes through the gas dissolving cavity, the stirrer can enhance fluid disturbance in the gas dissolving cavity and promote mixing and contact of the gas and the solvent, then the solvent is sprayed into the gas in a mist form through the spraying absorption assembly, and the absorption efficiency of bromine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bromine absorption, in particular to a bromine extraction absorption tower. Background Art

[0002] Bromine is an important chemical raw material, widely used in flame retardants, refrigerants, photosensitive materials, medicine, oil fields and other industries, and has special value in the national economy and scientific and technological development.

[0003] In the production process of bromine, an absorption tower is usually used at the end of the process to absorb gasified bromine to reduce the impact on the environment. The Chinese utility model patent with publication number CN222057355U provides a bromine absorption and extraction reaction tower, including a tower body, the interior of which is fixedly installed with a first grid plate, a first bed restriction plate, a second grid plate, a second bed restriction plate, and a liquid distributor from bottom to top, and a packing layer is provided between the first grid plate and the first bed restriction plate, and between the second grid plate and the second bed restriction plate. The outer wall of the tower body is fixedly installed with multiple groups of motor assemblies distributed around, and the output shaft of the motor assembly passes through the outer wall of the tower body and extends into the interior of the tower body. The output shaft of the motor assembly is connected to a stirring paddle through a coupling, and the stirring paddle is close to the bottom of the tower body.

[0004] Although the above equipment solves the problem of low cleaning efficiency of the existing absorption and extraction reaction tower, it still has some disadvantages. During operation, the absorbent flows from top to bottom and contacts the target gas flowing from bottom to top, and the purified gas is discharged from the top of the tower. During the process, the contact area and contact time between the absorbent and the target gas are easily insufficient, causing the target gas to escape and resulting in incomplete absorption. Summary of the invention

[0005] The object of the present invention is to provide a bromine extraction absorption tower, aiming to solve the problem of low bromine absorption efficiency.

[0006] In order to solve the above technical problems, the present invention provides a bromine extraction absorption tower, including a solvent box, a circulation pump group and an air induced component; a tower body is arranged on the top of the solvent box, and the tower body includes an upper cylinder and a lower cylinder which are sequentially connected from top to bottom, a spray absorption component is arranged inside the upper cylinder, the circulation pump group extracts the solvent from the solvent box and transports it to the spray absorption component through a pipeline, an air outlet is arranged on the top of the upper cylinder, a conical bottom is arranged inside the lower cylinder, an infusion port is arranged at the bottom of the conical bottom, an inner cylinder is sleeved inside the lower cylinder, and the inner cylinder The upper half of the cylinder is provided with a plurality of groups of overflow ports distributed in a surrounding manner, the upper end of the inner cylinder is connected to the inner wall of the lower cylinder through a conical collecting cover, the lower end of the inner cylinder is connected to the cone bottom, and a plurality of groups of overflow ports distributed in a surrounding manner are provided at the connection between the inner cylinder and the cone bottom; an air dissolution cavity is formed between the outer wall of the inner cylinder and the inner wall of the lower cylinder, an air inlet connected to the air dissolution cavity is provided on one side of the outer wall of the lower cylinder, the air inlet is connected to the air outlet through an air induction component, and a plurality of groups of mounting ports distributed in a surrounding manner and connected to the air dissolution cavity are provided on the outer wall of the lower cylinder, and each of the mounting ports is provided with a lateral agitator.

[0007] Preferably, the inner cavity of the upper cylinder is divided into an upper cavity and a lower cavity which are connected to each other by a liquid redistributor, and the spray absorption assembly includes a demister, a second sprayer and a second packing layer which are arranged in the upper cavity from top to bottom, and a first sprayer and a first packing layer which are arranged in the lower cavity from top to bottom, and the circulating pump group is respectively connected to the first sprayer and the second sprayer.

[0008] Preferably, the first sprayer and the second sprayer both comprise a sprayer body, and a plurality of groups of water mist nozzles are arranged at the lower end of the sprayer body.

[0009] Preferably, the water mist nozzle comprises a hollow connector, the upper end of which is connected to the sprinkler body, the lower end of which is rotatably connected to a base, and a sprinkler disc elastically connected and facing the connector is provided in the base.

[0010] Preferably, a round support is provided on the outer edge of the bottom of the connecting head, and the round support supports a thrust ball bearing sleeved on the connecting head. The outer cover of the connecting head is provided with a pressure cover that presses the thrust ball bearing. The outer wall of the connecting head is provided with an annular groove, and a retaining spring that presses against the pressure cover is inserted into the groove. The lower end of the connecting head is provided with a cone mouth connected to its inner cavity, and the upper end surface of the sprinkler plate is provided with a cone seat that matches the cone mouth. The pressure cover is fixedly connected to the base, and a spring is abutted between the bottom of the sprinkler plate and the inner bottom of the base. The outer wall of the base is provided with a plurality of circumferentially distributed guide holes, and the outer edge of the sprinkler plate is provided with a plurality of dispersion petals that pass through the corresponding guide holes, and the dispersion petals are arc-shaped.

[0011] Preferably, the output end of the circulation pump group is connected to the second sprayer through a main liquid inlet pipe, the tube body of the main liquid inlet pipe is provided with a third distributing valve and a fourth distributing valve, one end of the third distributing valve is connected to the first sprayer through a secondary liquid inlet pipe, the infusion port is connected to the fourth distributing valve through an infusion pipe, one end of the fourth distributing valve is connected to a drain pipe, the input end of the circulation pump group is connected to the solvent tank through a liquid outlet pipe, the tube body of the liquid outlet pipe is provided with a sixth distributing valve, the tube body of the infusion pipe is provided with a fifth distributing valve, and the fifth distributing valve is connected to the sixth distributing valve through a return pipe.

[0012] Preferably, a medium inlet and a medium outlet communicating with the gas dissolution cavity are provided on one side of the outer wall of the lower cylinder, and a medium coil is sleeved on the outer wall of the inner cylinder, the input end of the medium coil is connected to the medium inlet, and the output end of the medium coil is connected to the medium outlet.

[0013] Preferably, the induced draft component includes a booster fan, the air outlet is connected to an exhaust pipe, the body of the exhaust pipe is provided with a first distribution valve, the first distribution valve is connected to the input end of the booster fan through a return air pipe, the body of the return air pipe is provided with a second distribution valve, one end of the second distribution valve is connected to an air intake pipe, and the output end of the booster fan is connected to the air intake through an air supply pipe.

[0014] Preferably, the exhaust pipe body is provided with an outlet gas concentration sensor, and the intake pipe body is provided with an intake gas concentration sensor.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: The gas dissolution cavity allows the gas to fully contact with the solvent when passing through. The function of the agitator is to enhance the fluid disturbance in the gas dissolution cavity, promote the mixing and contact of the gas and the solvent, and improve the absorption efficiency of bromine; the solvent is then sprayed into the gas in the form of mist through the spray absorption component, further improving the absorption efficiency of bromine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the lower cylinder; Figure 3 It is a schematic diagram of the structure of a water mist nozzle; Figure 4is a cross-sectional view of a water mist nozzle; Figure 5 It is a schematic diagram of the structure of the sprinkler tray.

[0018] Figure numerals: 1-solvent tank, 2-medium inlet, 3-lower cylinder, 4-lateral agitator, 5-medium outlet, 6-first packing layer, 7-first sprayer, 8-liquid redistributor, 9-upper cylinder, 10-second packing layer, 11-second sprayer, 12-demister, 13-gas outlet, 14-gas outlet concentration sensor, 15-exhaust pipe, 16-main liquid inlet pipe, 17-secondary liquid inlet pipe, 18-first distribution valve, 19-return air pipe, 20-second distribution valve, 21-inlet pipe, 22-inlet concentration sensor, 23-third distribution valve, 24-boosting fan, 25-gas supply pipe, 26-fourth distribution valve , 27-drain pipe, 28-fifth distribution valve, 29-return pipe, 30-circulation pump group, 31-sixth distribution valve, 32-discharge pipe, 33-infusion pipe, 34-air inlet, 35-inner cylinder, 36-conical collection cover, 37-overflow port, 38-medium coil, 39-installation port, 40-gas dissolution cavity, 41-cone bottom, 42-overflow port, 43-infusion port, 44-connector, 45-circlip, 46-pressure cover, 47-guide hole, 48-sprinkling plate, 49-base, 50-slot, 51-thrust ball bearing, 52-round bracket, 53-spring, 54-cone seat, 55-cone mouth, 56-dispersion flap. DETAILED DESCRIPTION

[0019] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0020] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] like Figure 1As shown, a bromine extraction absorption tower includes a solvent box 1, a circulating pump group 30 and an induced draft assembly. A tower body is arranged on the top of the solvent box 1, and the tower body includes an upper cylinder 9 and a lower cylinder 3 which are sequentially connected from top to bottom, and a spray absorption assembly is arranged inside the upper cylinder 9. The solvent box 1 is used to store the solvent required for absorbing bromine, such as ethanol. At the same time, the solvent box 1 is also equipped with monitoring equipment such as a liquid level gauge and a temperature sensor to monitor the liquid level and temperature of the solvent in real time. The circulating pump group 30 is responsible for extracting the solvent from the solvent box 1 and conveying it to the spray absorption assembly through a pipeline to ensure that the solvent can be continuously and stably supplied to the absorption process. At the same time, the circulating pump group 30 is also responsible for extracting the solvent that has absorbed bromine from the bottom of the tower and pumping it to the spray absorption assembly to form a circulating absorption process. The induced draft assembly introduces the bromine-containing gas into the interior of the tower body, which is fully in contact with the sprayed solvent to achieve the absorption of bromine.

[0022] The top of the upper cylinder 9 is provided with an air outlet 13, and the inner cavity of the upper cylinder 9 is divided into an upper cavity and a lower cavity which are connected by a liquid redistributor 8. The spray absorption assembly comprises a defoamer 12, a second sprayer 11 and a second packing layer 10 which are sequentially arranged in the upper cavity from top to bottom, and a first sprayer 7 and a first packing layer 6 which are sequentially arranged in the lower cavity from top to bottom, and a circulation pump group 30 is connected to the first sprayer 7 and the second sprayer 11 respectively.

[0023] like Figure 2 As shown, a conical bottom 41 is provided inside the lower cylinder 3, and an infusion port 43 is provided at the bottom of the conical bottom 41. A coaxial inner cylinder 35 is sleeved inside the lower cylinder 3, and the upper end of the inner cylinder 35 is tightly connected to the inner wall of the lower cylinder 3 through a conical collecting cover 36, and the lower end of the inner cylinder 35 is directly connected to the conical bottom 41. An aerosol cavity 40 is formed between the outer wall of the inner cylinder 35 and the inner wall of the lower cylinder 3. The upper half of the inner cylinder 35 is provided with a plurality of groups of overflow ports 37 that are distributed around and connected to the aerosol cavity 40, so that the gas in the aerosol cavity 40 can escape to the inner cavity of the inner cylinder 35 through these overflow ports 37. A plurality of groups of overflow ports 42 that are distributed around are provided at the connection between the inner cylinder 35 and the conical bottom 41 to discharge or replace the liquid in the aerosol cavity 40.

[0024] An air inlet 34 connected to the gas dissolving chamber 40 is provided on one side of the outer wall of the lower cylinder 3, and the air inlet 34 is connected to the air outlet 13 through the air induction assembly. The solvent is injected into the gas dissolving chamber 40, and when the gas enters the gas dissolving chamber 40 through the air inlet 34, it will come into contact with the solvent. Due to the buoyancy of the gas, it will form rising bubbles. These bubbles will be fully mixed and contacted with the solvent during the rising process, thereby increasing the contact area and time between the bromine in the gas and the solvent.

[0025] The outer wall of the lower cylinder 3 is provided with a plurality of mounting openings 39 which are distributed around and connected to the gas dissolving chamber 40. The mounting openings 39 are arranged obliquely and point to the cone bottom 41. The mounting openings 39 are provided with a lateral stirrer 4, and the stirring paddle of the lateral stirrer 4 extends into the gas dissolving chamber 40. When the lateral stirrer 4 is started, the stirring paddle will produce a strong stirring effect in the gas dissolving chamber 40. Since the mounting openings 39 are inclined, the stirring force of the stirring paddle not only acts in the horizontal direction, but also produces a downward component, which helps to stir the fluid near the cone bottom 41 upward, thereby enhancing the mixing effect in the entire gas dissolving chamber 40, thereby promoting the dissolution of bromine.

[0026] A medium inlet 2 and a medium outlet 5 connected to the gas dissolving cavity 40 are arranged on one side of the outer wall of the lower cylinder 3, and a medium coil 38 is sleeved on the outer wall of the inner cylinder 35, the input end of the medium coil 38 is connected to the medium inlet 2, and the output end of the medium coil 38 is connected to the medium outlet 5. When the medium enters the medium coil 38 through the medium inlet 2, it flows along the inner wall of the coil, and in the process, heat is exchanged with the solvent in the gas dissolving cavity 40 and the inner cylinder 35. The temperature of the fluid in the inner cylinder 35 and the gas dissolving cavity 40 is adjusted by the medium coil 38 to maintain the fluid in the gas dissolving cavity 40 within the required temperature range and ensure the efficient absorption of bromine by the solvent.

[0027] The induced draft assembly includes a booster fan 24, an exhaust pipe 15 is connected to the air outlet 13, and an outlet gas concentration sensor 14 is provided on the pipe body of the exhaust pipe 15. A first distribution valve 18 is provided on the pipe body of the exhaust pipe 15, and the first distribution valve 18 is connected to the input end of the booster fan 24 through a return pipe 19. A second distribution valve 20 is provided on the pipe body of the return pipe 19, and one end of the second distribution valve 20 is connected to an air intake pipe 21, and an air intake concentration sensor 22 is provided on the pipe body of the air intake pipe 21. The output end of the booster fan 24 is connected to the air intake 34 through an air delivery pipe 25. The bromine-containing gas enters the system from the air intake pipe 21, is pressurized by the booster fan 24, and is sent to the gas dissolution chamber 40. The gas rises continuously in the tower body and is finally discharged from the air outlet 13.

[0028] The output end of the circulation pump group 30 is connected to the second sprayer 11 through the main liquid inlet pipe 16, and the pipe body of the main liquid inlet pipe 16 is provided with a third distribution valve 23 and a fourth distribution valve 26. One end of the third distribution valve 23 is connected to the first sprayer 7 through the auxiliary liquid inlet pipe 17, and the infusion port 43 is connected to the fourth distribution valve 26 through the infusion pipe 33, and one end of the fourth distribution valve 26 is connected to the drain pipe 27. The input end of the circulation pump group 30 is connected to the solvent tank 1 through the liquid outlet pipe 32, and the pipe body of the liquid outlet pipe 32 is provided with a sixth distribution valve 31, and the pipe body of the infusion pipe 33 is provided with a fifth distribution valve 28, and the fifth distribution valve 28 is connected to the sixth distribution valve 31 through the return pipe 29.

[0029] The circulating pump group 30 extracts the solvent from the solvent tank 1 through the liquid outlet pipe 32, and then pumps it into the inner cavity of the inner cylinder 35 through the liquid infusion pipe 33. As the solvent is pumped in, the liquid level inside it gradually rises. When the liquid level reaches a certain level, the solvent will flow into the gas dissolution cavity 40 through the overflow port 42 until the liquid level in the gas dissolution cavity 40 (measured by the built-in liquid level sensor) reaches a preset value. Through the heat exchange effect of the medium coil 38, the solvent temperature in the gas dissolution cavity 40 and the inner cylinder 35 (measured by the built-in temperature sensor) reaches a preset value. After the temperature and water level reach the standard, the valve port of the sixth distribution valve 31 leading to the solvent tank 1 is closed, and the valve port leading to the fifth distribution valve 28 is opened. The solvent in the inner cylinder 35 is pumped to the first sprayer 7 and the second sprayer 11 through the circulating pump group 30 through the main and auxiliary liquid inlet pipes (the main liquid inlet pipe 16 and the auxiliary liquid inlet pipe 17), and the ratio of the spraying flow rate of the first sprayer 7 to the second sprayer 11 is 2:1. The sprayed solvent flows back to the inner cylinder 35 through the packing layer, and then is extracted by the circulation pump unit 30 to form a closed loop circulation.

[0030] Then, the valve of the air inlet 34 is opened (the air inlet 34 is connected to an upper bend pipe to prevent the solvent in the gas dissolution chamber 40 from entering the gas delivery pipe 25), and the bromine-containing gas enters the system from the air inlet pipe 21. The air intake concentration sensor 22 monitors the concentration of bromine in the gas in real time (the spraying amount of the first sprayer 7 and the second sprayer 11 is dynamically adjusted according to the monitoring data), and the gas is pressurized by the booster fan 24 and sent to the gas dissolution chamber 40. The gas entering the gas dissolution chamber 40 will come into contact with the solvent to form rising bubbles. These bubbles are fully mixed and contacted with the solvent during the rising process, thereby increasing the contact area and time between the bromine in the gas and the solvent. The gas that has been initially debrominated continues to rise, passes through the packing layer and fully contacts the sprayed solvent, further removes the residual bromine, and finally overflows from the gas outlet 13.

[0031] After the gas overflowing from the gas outlet 13 is detected by the gas outlet concentration sensor 14, if the residual bromine meets the requirements, the gas is directly discharged. If it does not meet the requirements, the valve port of the first distribution valve 18 leading to the return gas pipe 19 is opened, and the gas is reintroduced into the system for re-processing.

[0032] As bromine is removed, the concentration of bromine dissolved in the solvent gradually increases, and the efficiency of bromine removal gradually decreases. When the bromine concentration in the solvent in the inner cylinder 35 reaches a preset value, the booster fan 24 is shut down, the valve port of the air inlet 34 is closed, and the valve port of the fifth distribution valve 28 leading to the return pipe 29 is opened. At the same time, the valve port of the fourth distribution valve 26 leading to the third distribution valve 23 is closed, and the valve port leading to the drain pipe 27 is opened. The solvent in the inner cylinder 35 is discharged by the circulation pump group 30 for the next step of processing.

[0033] like Figures 3 to 5As shown, the first sprinkler 7 and the second sprinkler 11 both include a sprinkler body, and a plurality of water mist nozzles are arranged at the lower end of the sprinkler body. The water mist nozzle includes a hollow connector 44, the upper end of the connector 44 is connected to the sprinkler body, and the lower end of the connector 44 is rotatably connected to a base 49, and a watering plate 48 is arranged in the base 49 and is elastically connected and directly facing the connector 44.

[0034] The outer edge of the bottom of the connector 44 is provided with a round support 52, which supports a thrust ball bearing 51 sleeved on the connector 44, and the connector 44 is covered with a pressure cover 46 pressing the thrust ball bearing 51. The outer wall of the connector 44 is provided with an annular groove 50, and the retaining spring 45 against the pressure cover 46 is inserted into the groove 50 to ensure that the pressure cover 46 will not fall off. The lower end of the connector 44 is provided with a cone 55 connected to its inner cavity, and the upper end surface of the water sprinkling plate 48 is provided with a cone seat 54 adapted to the cone 55. The pressure cover 46 is fixedly connected to the base 49, and a spring 53 is abutted between the bottom of the water sprinkling plate 48 and the inner bottom of the base 49. The outer wall of the base 49 is provided with a plurality of circumferentially distributed guide holes 47, and the outer edge of the water sprinkling plate 48 is provided with a plurality of dispersion petals 56 passing through the corresponding guide holes 47, and the dispersion petals 56 are arc-shaped and tangent to the upper surface of the water sprinkling plate 48.

[0035] When the solvent flows from the sprayer body into the water mist nozzle, it enters the water spray plate 48 through the inner cavity of the connector 44. Under the action of water pressure, the water flow pushes the water spray plate 48 downward, the spring 53 is compressed, and the cone 55 is opened. The water flow that hits the cone seat 54 forms a water film, which is guided by the cone seat 54 and spreads along the upper surface of the water spray plate 48. The design of the dispersion petal 56 can disperse the water film into smaller streams, thereby forming a mist spray effect.

[0036] Finally, when the spraying process is finished, as the solvent decreases and the pressure drops, the spring 53 gradually recovers its original length, pushing the water spraying plate 48 upward and closing the cone 55. In this way, the sprayers (the first sprayer 7 and the second sprayer 11) have completed a complete spraying cycle and are ready for the next spraying. Closing the cone 55 can also prevent external impurities and dust from entering the spraying system, keeping the system clean and running stably.

[0037] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bromine extraction absorption tower, characterized in that: The invention comprises a solvent box (1), a circulation pump group (30) and an air induction assembly; a tower body is arranged on the top of the solvent box (1), the tower body comprises an upper cylinder (9) and a lower cylinder (3) which are connected to each other from top to bottom, a spray absorption assembly is arranged inside the upper cylinder (9), the circulation pump group (30) extracts the solvent from the solvent box (1) and transports it to the spray absorption assembly through a pipeline, an air outlet (13) is arranged on the top of the upper cylinder (9), a conical bottom (41) is arranged inside the lower cylinder (3), an infusion port (43) is arranged at the bottom of the conical bottom (41), an inner cylinder (35) is sleeved inside the lower cylinder (3), a plurality of groups of overflow ports (37) distributed around the inner cylinder (35) are arranged on the upper half of the inner cylinder (35), and the inner cylinder (35) is provided with a plurality of groups of overflow ports (37) distributed around the inner cylinder (35). The upper end of the cylinder (35) is connected to the inner wall of the lower cylinder (3) through a conical collecting cover (36), the lower end of the inner cylinder (35) is connected to the conical bottom (41), and a plurality of overflow ports (42) distributed around the connection between the inner cylinder (35) and the conical bottom (41) are provided; an aerosol cavity (40) is formed between the outer wall of the inner cylinder (35) and the inner wall of the lower cylinder (3); an air inlet (34) connected to the aerosol cavity (40) is provided on one side of the outer wall of the lower cylinder (3); the air inlet (34) is connected to the air outlet (13) through an air induction assembly; and a plurality of mounting ports (39) distributed around and connected to the aerosol cavity (40) are provided on the outer wall of the lower cylinder (3), and each mounting port (39) is provided with a lateral agitator (4).

2. The bromine extraction absorption tower according to claim 1, characterized in that: The inner cavity of the upper cylinder (9) is divided into an upper cavity and a lower cavity which are connected to each other through a liquid redistributor (8); the spray absorption assembly comprises a demister (12), a second sprayer (11) and a second packing layer (10) which are arranged in sequence from top to bottom in the upper cavity, and a first sprayer (7) and a first packing layer (6) which are arranged in sequence from top to bottom in the lower cavity; the circulating pump group (30) is respectively connected to the first sprayer (7) and the second sprayer (11).

3. The bromine extraction absorption tower according to claim 2, characterized in that: The first sprayer (7) and the second sprayer (11) both comprise a sprayer body, and a plurality of groups of water mist nozzles are arranged at the lower end of the sprayer body.

4. The bromine extraction absorption tower according to claim 3, characterized in that: The water mist nozzle comprises a hollow connecting head (44), the upper end of the connecting head (44) being connected to a sprinkler body, the lower end of the connecting head (44) being rotatably connected to a base (49), and a watering disc (48) being elastically connected and facing the connecting head (44) being arranged inside the base (49).

5. The bromine extraction absorption tower according to claim 4, characterized in that: The outer edge of the bottom of the connector (44) is provided with a round support (52), the round support (52) supports a thrust ball bearing (51) sleeved on the connector (44), the connector (44) is covered with a pressure cover (46) for pressing the thrust ball bearing (51), the outer wall of the connector (44) is provided with an annular groove (50), a retaining spring (45) for pressing against the pressure cover (46) is inserted into the groove (50), and the lower end of the connector (44) is provided with a cone (55) communicating with its inner cavity. The upper end surface of the watering plate (48) is provided with a cone seat (54) adapted to the cone mouth (55); the pressure cover (46) is fixedly connected to the base (49); a spring (53) is abutted between the bottom of the watering plate (48) and the inner bottom of the base (49); the outer wall of the base (49) is provided with a plurality of circumferentially distributed guide holes (47); the outer edge of the watering plate (48) is provided with a plurality of dispersion petals (56) passing through the corresponding guide holes (47); the dispersion petals (56) are arc-shaped.

6. The bromine extraction absorption tower according to claim 2, characterized in that: The output end of the circulation pump group (30) is connected to the second sprayer (11) via a main liquid inlet pipe (16); the pipe body of the main liquid inlet pipe (16) is provided with a third distribution valve (23) and a fourth distribution valve (26); one end of the third distribution valve (23) is connected to the first sprayer (7) via an auxiliary liquid inlet pipe (17); the infusion port (43) is connected to the fourth distribution valve (26) via an infusion pipe (33); one end of the fourth distribution valve (26) is connected to a discharge pipe (27); the input end of the circulation pump group (30) is connected to the solvent tank (1) via an outlet pipe (32); the pipe body of the outlet pipe (32) is provided with a sixth distribution valve (31); the pipe body of the infusion pipe (33) is provided with a fifth distribution valve (28); the fifth distribution valve (28) is connected to the sixth distribution valve (31) via a return pipe (29).

7. The bromine extraction absorption tower according to claim 1, characterized in that: A medium inlet (2) and a medium outlet (5) communicating with the gas dissolving cavity (40) are provided on one side of the outer wall of the lower cylinder (3); a medium coil (38) is sleeved on the outer wall of the inner cylinder (35); an input end of the medium coil (38) is connected to the medium inlet (2), and an output end of the medium coil (38) is connected to the medium outlet (5).

8. The bromine extraction absorption tower according to claim 1, characterized in that: The air induction assembly comprises a booster fan (24); the air outlet (13) is connected to an exhaust pipe (15); the exhaust pipe (15) is provided with a first distribution valve (18); the first distribution valve (18) is connected to an input end of the booster fan (24) via an air return pipe (19); the return pipe (19) is provided with a second distribution valve (20); one end of the second distribution valve (20) is connected to an air intake pipe (21); and the output end of the booster fan (24) is connected to an air intake port (34) via an air delivery pipe (25).

9. The bromine extraction absorption tower according to claim 8, characterized in that: The exhaust pipe (15) is provided with an exhaust gas concentration sensor (14) on its body, and the intake pipe (21) is provided with an intake gas concentration sensor (22) on its body.

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