Tail gas absorption device for bromine production

Abstract

A tail gas absorption device for bromine production relates to the technical field of tail gas absorption and comprises a fixedly arranged absorption tank, an upper fixed circular plate and a lower fixed circular plate which abut against the inner wall of the absorption tank are coaxially arranged in the absorption tank, and primary absorption assemblies are arranged at the inner bottom of the absorption tank and the top of the lower fixed circular plate. A primary absorption assembly is arranged at the top of the upper fixed circular plate, a secondary absorption assembly is arranged at the top of the upper fixed circular plate, a cooling assembly is further arranged in the absorption tank, the primary absorption assembly comprises a lower gas collection hopper which is coaxial with the absorption tank and is fixedly arranged, a plurality of gas ejector pipes are uniformly distributed around the lower gas collection hopper and are vertically arranged, and the tops and the bottoms of the gas ejector pipes are sealed; a plurality of vent holes communicated with the inner cavity are uniformly distributed in the outer wall of the gas spraying pipe along the circumferential direction; and the upper end opening of the lower gas collecting hopper is sealed. The tail gas absorption device for bromine production solves the problem that bromine tail gas cannot be fully absorbed due to the fact that the contact time of the bromine tail gas and alkali liquor is short when the existing tail gas absorption device for bromine production is used for absorbing the bromine tail gas.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas absorption, in particular to a tail gas absorption device for bromine production. Background Art

[0002] Bromine is a reddish brown liquid, volatile, highly corrosive, slightly soluble in water, soluble in ethanol, ether, chloroform, carbon tetrachloride, kerosene, carbon disulfide and other organic solvents, and also soluble in hydrochloric acid, hydrobromic acid and bromine compound solutions. Bromine is an important chemical raw material, widely used in flame retardants, fire extinguishing agents, refrigerants, photosensitive materials, medicines, pesticides, oil fields and other industries.

[0003] In the process of producing existing bromine through the distillation process, bromine itself has high volatility, which makes a large amount of tail gas generated during the production. If a large amount of bromine-containing gas is directly discharged into the atmosphere, it will cause environmental pollution and is not conducive to environmental protection. In order to reduce the pollution of bromine gas to the air, it is necessary to use a tail gas absorption device to absorb and treat the bromine gas.

[0004] The existing tail gas absorption device for bromine production has gradually exposed its shortcomings during use, mainly in the following aspects:

[0005] When absorbing bromine tail gas, the bromine tail gas is usually directly introduced into the alkaline solution to cause a chemical reaction between the bromine tail gas and the alkaline solution to absorb the bromine tail gas. However, after the bromine tail gas enters the alkaline solution, the contact time with the alkaline solution is short, resulting in the bromine tail gas being unable to fully react with the alkaline solution, affecting the absorption effect of the bromine tail gas.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a tail gas absorption device for bromine production, which can not only increase the contact time between bromine tail gas and alkali solution, but also promote bromine liquefaction, so that bromine and alkali solution can fully react, thereby improving the absorption effect of bromine tail gas.

[0008] In order to solve the above problems, the utility model provides the following technical solutions:

[0009] A tail gas absorption device for bromine production comprises a fixed absorption tank, wherein an upper fixed circular plate and a lower fixed circular plate are coaxially arranged in the absorption tank and abut against the inner wall thereof, a primary absorption component is arranged at the inner bottom of the absorption tank and the top of the lower fixed circular plate, a secondary absorption component is arranged at the top of the upper fixed circular plate, and a cooling component is also arranged in the absorption tank.

[0010] The contact time between the bromine tail gas and the alkali solution can be increased by the two primary absorption components and the secondary absorption component; the liquefaction of the bromine tail gas can be accelerated by the cooling component;

[0011] The primary absorption assembly comprises a lower gas collecting hopper which is coaxial with the absorption tank and fixedly arranged. A plurality of gas injection pipes are evenly arranged around the lower gas collecting hopper. The gas injection pipes are vertically arranged and sealed at the top and the bottom. A plurality of vents are evenly arranged on the outer wall of the gas injection pipe along the circumference thereof to communicate with the inner cavity thereof.

[0012] The upper port of the lower gas collecting hopper is sealed, and a lower ventilation pipe connected to the inner cavity of the gas injection pipe is fixedly provided on the top of the gas injection pipe, and one end of the lower ventilation pipe extends upward and is connected to the inner cavity of the lower gas collecting hopper.

[0013] The lower ports of the two lower gas collecting hoppers extend downward and pass through the lower fixed circular plate and the absorption tank respectively. An air intake pipe is fixedly provided below the absorption tank, and one end of the air intake pipe is connected to the lower port of the lower gas collecting hopper located below.

[0014] As an optimized solution, two rotating shafts rotatably arranged along a vertical line are symmetrically provided on both sides of the two lower gas collecting hoppers along their axial sections, and a plurality of stirring blades are evenly distributed on the outer wall of the rotating shaft along its axial direction.

[0015] As an optimized solution, the secondary absorption assembly includes an upper gas collecting hopper coaxially fixed to the top of the upper fixed circular plate, and a plurality of lower connecting pipes and lower connecting pipes are evenly distributed along the circumference of the upper fixed circular plate and are alternately connected. The lower connecting pipes and the lower connecting pipes are both arc-shaped structures. The plurality of lower connecting pipes and the lower connecting pipes are spliced ​​into a circular structure and are coaxially arranged with the upper gas collecting hopper.

[0016] Several exhaust holes connected to the inner cavity are evenly distributed on the outer walls of the several lower connecting tubes and the lower communicating tubes, and the exhaust holes are all set downward. The upper port of the upper gas collecting hopper is sealed, and an upper ventilation pipe connected to the inner cavity is fixedly provided on the outer wall of the lower communicating tube. One end of the upper ventilation pipe extends upward and is connected to the inner cavity of the upper gas collecting hopper, and the lower port of the upper gas collecting hopper extends downward and passes through the upper fixed circular plate.

[0017] As an optimized solution, a plurality of upper connecting pipes and upper connecting pipes are evenly distributed along the circumference above the upper gas collecting hopper, and the upper connecting pipes and upper connecting pipes are both arc-shaped structures. A plurality of the upper connecting pipes and upper connecting pipes are spliced ​​into a circular structure and are coaxially arranged with the absorption tank.

[0018] An atomizing nozzle connected to the inner cavity of the upper connecting pipe is fixedly arranged on the outer wall of the upper connecting pipe, and the water spraying port of the atomizing nozzle is arranged downward.

[0019] As an optimized solution, a rotatable driving shaft is coaxially provided on the inner top of the absorption tank, and a plurality of rotating blades are evenly distributed along the circumference of the driving shaft on the outer wall between the atomizing nozzle and the upper gas collecting hopper.

[0020] As an optimized solution, the cooling assembly includes a plurality of cold water pipes vertically arranged on the top of the upper fixed circular plate, and the plurality of cold water pipes are also symmetrically arranged along the axial section of the absorption tank. The lower ports of the plurality of cold water pipes all pass through the upper fixed circular plate and extend to the top of the lower fixed circular plate, and the outer walls of the cold water pipes are coaxially fixed with a plurality of vertically parallel cooling fins.

[0021] As an optimized solution, a water chiller is fixedly provided on the side of the absorption tank, and the water inlet and the water outlet of the water chiller are respectively provided with a water outlet pipe and a water inlet pipe connected thereto, and one end of the water outlet pipe and the water inlet pipe respectively pass through the absorption tank and extend to the inside.

[0022] The lower ports of several cold water pipes pass through the lower fixed circular plate and are all connected with the ports of the water outlet pipes, and the upper ports of several cold water pipes are connected with the ports of the water inlet pipes.

[0023] As an optimized solution, three water inlet valves connected to the inner cavity of the absorption tank are fixedly provided on the outer wall of the absorption tank, and the three water inlet valves are respectively located above and below the upper fixed circular plate and below the lower fixed circular plate.

[0024] An alkaline solution box and a water pump are fixedly provided on the side of the absorption tank and are connected to each other. The water outlet of the water pump is connected to three water inlet valves through a water pipe.

[0025] As an optimized solution, a fixed pipe connected to the inner cavity of one of the upper connecting pipes is fixedly provided on the outer wall of the upper connecting pipe, and one end of the fixed pipe is connected to one end of the water inlet valve located at the top.

[0026] As an optimized solution, three drain valves connected to the inner cavity of the absorption tank are fixed on the outer wall of the absorption tank. The three drain valves are respectively located below the upper fixed circular plate, the lower fixed circular plate and the absorption tank. One end of the three drain valves extends upward and passes through the upper fixed circular plate, the lower fixed circular plate and the absorption tank accordingly.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The two primary absorption components and the secondary absorption component can not only increase the contact time between the bromine gas and the alkali solution, but also enable the bromine tail gas and the atomized alkali solution to be fully mixed, thereby improving the absorption effect of the bromine tail gas. At the same time, the cooling component can accelerate the liquefaction of the bromine gas, thereby further improving the absorption effect of the bromine tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0030] Figure 1 It is a schematic diagram of the structure of the utility model;

[0031] Figure 2 It is a structural schematic diagram of the vent hole of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the heat dissipation fin of the utility model;

[0033] Figure 4 It is a schematic diagram of the structure of the exhaust hole of the utility model;

[0034] Figure 5 It is a structural schematic diagram of the chiller of the utility model.

[0035] In the figure: 1- chiller; 2- drain valve; 3- absorption tank; 4- exhaust pipe; 5- water inlet valve; 6- water pipe; 7- alkali liquid tank; 8- water pump; 9- air inlet pipe; 10- primary absorption assembly; 11- cooling assembly; 12- upper ventilation pipe; 13- secondary absorption assembly; 14- rotating blade; 15- driving shaft; 16- upper connecting pipe; 17- upper connecting pipe; 18- atomizing nozzle; 19- control motor; 20- fixed pipe; 21- upper air collecting hopper; 22- lower connecting pipe; 23- lower connecting pipe; 24- upper fixed circular plate; 25- lower fixed circular plate; 26- driving motor; 27- vent hole; 28- jet pipe; 29- lower air collecting hopper; 30- lower ventilation pipe; 31- rotating shaft; 32- stirring blade; 33- water outlet pipe; 34- heat sink fin; 35- cold water pipe; 36- water inlet pipe; 37- exhaust hole. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0037] like Figures 1 to 5As shown, a tail gas absorption device for bromine production includes a fixed absorption tank 3, an upper fixed circular plate 24 and a lower fixed circular plate 25 are coaxially arranged in the absorption tank 3 and abut against the inner wall thereof, a primary absorption assembly 10 is arranged at the inner bottom of the absorption tank 3 and the top of the lower fixed circular plate 25, a secondary absorption assembly 13 is arranged at the top of the upper fixed circular plate 24, and a cooling assembly 11 is also arranged in the absorption tank 3.

[0038] The contact time between the bromine tail gas and the alkali solution can be increased by the two primary absorption components 10 and the secondary absorption component 13; the liquefaction of the bromine tail gas can be accelerated by the cooling component 11;

[0039] The primary absorption assembly 10 includes a lower gas collecting hopper 29 which is coaxial with the absorption tank 3 and fixedly arranged. A plurality of gas injection pipes 28 are evenly distributed around the lower gas collecting hopper 29. The gas injection pipes 28 are vertically arranged, and the top and the bottom are both sealed. A plurality of vents 27 are evenly distributed on the outer wall of the gas injection pipe 28 along the circumference thereof to communicate with the inner cavity thereof.

[0040] The upper end of the lower gas collecting hopper 29 is sealed, and a lower ventilation pipe 30 connected to the inner cavity of the gas injection pipe 28 is fixedly provided on the top of the gas injection pipe 28. One end of the lower ventilation pipe 30 extends upward and is connected to the inner cavity of the lower gas collecting hopper 29.

[0041] The lower ports of the two lower gas collecting hoppers 29 extend downward and pass through the lower fixed circular plate 25 and the absorption tank 3 respectively. An air intake pipe 9 is fixedly provided below the absorption tank 3. One end of the air intake pipe 9 is connected to the lower port of the lower gas collecting hopper 29 located below.

[0042] The bromine tail gas passes through the jet pipes 28 below and above the lower fixed circular plate 25 successively, which increases the contact time between the bromine tail gas and the alkali solution and improves the absorption of the bromine tail gas.

[0043] Two rotating shafts 31 are symmetrically arranged along the axial cross section of the two lower gas collecting hoppers 29 on both sides thereof, and are arranged to rotate along the vertical line. A plurality of stirring blades 32 are evenly distributed on the outer wall of the rotating shaft 31 along the axial direction thereof.

[0044] The bromine tail gas is discharged through the vent holes 27 on the plurality of jet pipes 28 , and the cooperation of the rotating stirring blades 32 enables the alkali solution and the bromine tail gas to be in better contact with each other.

[0045] The secondary absorption assembly 13 includes an upper gas collecting hopper 21 coaxially fixed to the top of an upper fixed circular plate 24. A plurality of lower connecting pipes 22 and lower connecting pipes 23 are evenly distributed along the circumference of the upper fixed circular plate 24 and are alternately connected. Both the lower connecting pipes 22 and the lower connecting pipes 23 are arc-shaped structures. The plurality of lower connecting pipes 22 and the lower connecting pipes 23 are spliced ​​into a circular structure and are coaxially arranged with the upper gas collecting hopper 21.

[0046] A plurality of exhaust holes 37 connected to the inner cavity thereof are evenly distributed on the outer walls of the plurality of lower connecting tubes 22 and the lower connecting tubes 23, and the exhaust holes 37 are all set downward. The upper port of the upper gas collecting hopper 21 is sealed, and an upper ventilation pipe 12 connected to the inner cavity thereof is fixedly provided on the outer wall of the lower connecting tube 23. One end of the upper ventilation pipe 12 extends upward and is connected to the inner cavity of the upper gas collecting hopper 21. The lower port of the upper gas collecting hopper 21 extends downward and passes through the upper fixed circular plate 24.

[0047] A plurality of upper connecting pipes 16 and upper connecting pipes 17 are evenly distributed along the circumference of the upper gas collecting hopper 21 and are alternately connected. The upper connecting pipes 16 and the upper connecting pipes 17 are both arc-shaped structures. A plurality of upper connecting pipes 16 and the upper connecting pipes 17 are spliced ​​into a circular structure and are coaxially arranged with the absorption tank 3.

[0048] The outer wall of the upper connecting pipe 16 is fixedly provided with an atomizing nozzle 18 connected to the inner cavity thereof, and the water spraying port of the atomizing nozzle 18 is arranged downward;

[0049] After the alkali solution is sprayed out through the atomizing nozzle 18, it can better contact with the bromine tail gas discharged from the exhaust hole 37, further improving the absorption of the bromine tail gas.

[0050] The atomized alkali solution is collected above the upper fixed circular plate 24. The bromine tail gas is discharged through the exhaust hole 37 and reacts with the alkali solution collected above the upper fixed circular plate 24 first, thereby improving the absorption effect of the bromine tail gas and reducing the waste of the alkali solution.

[0051] A driving shaft 15 is coaxially arranged to rotate at the inner top of the absorption tank 3. A plurality of rotating blades 14 are evenly distributed along the circumference of the outer wall of the driving shaft 15 between the atomizing nozzle 18 and the upper gas collecting hopper 21.

[0052] When the rotary blades 14 rotate, the atomized alkali solution can be fully contacted with the bromine tail gas.

[0053] The cooling assembly 11 includes a plurality of cold water pipes 35 vertically arranged on the top of the upper fixed circular plate 24. The plurality of cold water pipes 35 are also symmetrically arranged along the axial section of the absorption tank 3. The lower ports of the plurality of cold water pipes 35 all pass through the upper fixed circular plate 24 and extend to the top of the lower fixed circular plate 25. The outer walls of the cold water pipes 35 are coaxially fixed with a plurality of heat dissipation fins 34 vertically arranged in parallel.

[0054] The cold water in the cold water pipe 35 exchanges heat with the alkali solution to cool the alkali solution. The bromine tail gas can be accelerated to liquefy when passing through the lower gas collecting hopper 29 and the upper gas collecting hopper 21 located above, further improving the absorption effect of the bromine tail gas.

[0055] A chiller 1 is fixedly installed on the side of the absorption tank 3. The water inlet and the water outlet of the chiller 1 are respectively provided with a water outlet pipe 33 and a water inlet pipe 36 which are connected and arranged. One end of the water outlet pipe 33 and the water inlet pipe 36 respectively pass through the absorption tank 3 and extend to the inside.

[0056] The lower ports of the plurality of cold water pipes 35 pass through the lower fixed circular plate 25 and are all connected to the ports of the water outlet pipe 33 , and the upper ports of the plurality of cold water pipes 35 are connected to the ports of the water inlet pipe 36 .

[0057] The tops of the two rotating shafts 31 located below the lower fixed circular plate 25 extend upward through the lower fixed circular plate 25 and are fixedly connected to the two rotating shafts 31 located above the lower fixed circular plate 25 .

[0058] Two driving motors 26 are fixedly provided at the bottom of the absorption tank 3 . The output ends of the two driving motors 26 both pass through the absorption tank 3 and are fixedly connected to the two rotating shafts 31 .

[0059] Three water inlet valves 5 connected to the inner cavity of the absorption tank 3 are fixedly provided on the outer wall thereof. The three water inlet valves 5 are respectively located above and below the upper fixed circular plate 24 and below the lower fixed circular plate 25.

[0060] An alkaline solution box 7 and a water pump 8 are fixedly provided on the side of the absorption tank 3 , and the water outlet of the water pump 8 is connected to the three water inlet valves 5 through a water pipe 6 .

[0061] A fixed pipe 20 communicating with the inner cavity of one of the upper connecting pipes 17 is fixedly disposed on the outer wall thereof, and one end of the fixed pipe 20 is communicated with one end of the water inlet valve 5 located at the top.

[0062] Three drain valves 2 connected to the inner cavity of the absorption tank 3 are fixed on the outer wall thereof. The three drain valves 2 are respectively located below the upper fixed circular plate 24, the lower fixed circular plate 25 and the absorption tank 3. One end of the three drain valves 2 extends upward and passes through the upper fixed circular plate, the lower fixed circular plate 25 and the absorption tank 3 respectively.

[0063] A control motor 19 is fixedly provided on the top of the absorption tank 3 , and an output end of the control motor 19 passes through the absorption tank 3 and is fixedly connected to the driving shaft 15 .

[0064] An exhaust pipe 4 communicating with the inner cavity of the absorption tank 3 is also fixedly provided on the top of the absorption tank 3 .

[0065] The working principle of this device is:

[0066] When absorbing bromine tail gas, bromine tail gas enters the lower gas collecting hopper 29 located below through the air inlet pipe 9, and the bromine tail gas passes through the lower ventilation pipe 30 and the injection pipe 28 located below in turn, and is finally discharged from the vent hole 27, and contacts and reacts with the alkali solution. At the same time, the driving motor 26 drives the rotating shaft 31 and the stirring blade 32 to rotate, and the rotating stirring blade 32 can make the alkali solution and the bromine tail gas contact better. After the initial absorption, the bromine tail gas passes through the upper lower gas collecting hopper 29, the lower ventilation pipe 30 and the injection pipe 28 in turn, and is discharged from the upper vent hole 27 again, and contacts and reacts with the alkali solution. The stirring blade 32 located above rotates to stir the alkali solution and the bromine tail gas, thereby improving the absorption effect of the bromine tail gas.

[0067] The bromine tail gas after secondary absorption passes through the upper gas collecting hopper 21, the upper ventilation pipe 12, the lower connecting pipe 22 and the lower connecting pipe 23 in sequence, and is discharged from the exhaust hole 37. The alkali liquid in the alkali liquid tank 7 passes through the water pipe 6, the water inlet valve 5, the fixed pipe 20, the upper connecting pipe 17 and the upper connecting pipe 16, and is sprayed out after being atomized by the atomizing nozzle 18. At the same time, the control motor 19 drives the driving shaft 15 and the rotating blade 14 to rotate. The atomized alkali liquid fully contacts with the bromine tail gas under the stirring of the rotating blade 14, and the bromine tail gas is fully absorbed. The atomized alkali liquid is finally collected on the upper side of the upper fixed circular plate 24. When the bromine tail gas is discharged from the exhaust hole 37, it preferentially contacts with the alkali liquid collected on the upper side of the upper fixed circular plate 24, thereby reducing the waste of alkali liquid.

[0068] During the absorption process of bromine tail gas, the cold water generated by the chiller 1 enters the cold water pipe 35 through the water inlet pipe 36, and the heat dissipation fins 34 on the cold water pipe 35 perform heat exchange with the alkali solution above the upper fixed circular plate 24 and the lower fixed circular plate 25 to cool the alkali solution. When the bromine tail gas passes through the lower gas collecting hopper 29 and the upper gas collecting hopper 21 located above, the liquefaction of the bromine tail gas can be accelerated. The liquefied bromine adheres to the inner walls of the upper gas collecting hopper 21 and the lower gas collecting hopper 29, flows into the alkali solution under the action of gravity, and is absorbed. By performing multi-stage absorption of the bromine tail gas, the contact time between the bromine tail gas and the alkali solution is increased. At the same time, the bromine tail gas is fully mixed with the atomized alkali solution, which improves the absorption effect of the bromine tail gas. By accelerating the liquefaction of the bromine tail gas, the absorption effect of the bromine tail gas is further improved.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A tail gas absorption device for bromine production, characterized in that: The invention comprises a fixed absorption tank (3), wherein an upper fixed circular plate (24) and a lower fixed circular plate (25) are coaxially arranged in the absorption tank (3) and are abutted against the inner wall thereof, a primary absorption component (10) is arranged on the inner bottom of the absorption tank (3) and the top of the lower fixed circular plate (25), a secondary absorption component (13) is arranged on the top of the upper fixed circular plate (24), and a cooling component (11) is also arranged in the absorption tank (3). The contact time between the bromine tail gas and the alkali solution can be increased by the two primary absorption components (10) and the secondary absorption component (13); the liquefaction of the bromine tail gas can be accelerated by the cooling component (11); The primary absorption assembly (10) comprises a lower gas collecting hopper (29) which is coaxial with the absorption tank (3) and fixedly arranged. A plurality of gas injection pipes (28) are evenly arranged around the lower gas collecting hopper (29). The gas injection pipes (28) are vertically arranged and sealed at the top and the bottom. A plurality of vent holes (27) which are connected to the inner cavity of the gas injection pipe (28) are evenly arranged on the outer wall of the gas injection pipe (28) along the circumference thereof. The upper end of the lower gas collecting hopper (29) is sealed, and a lower ventilation pipe (30) connected to the inner cavity of the gas injection pipe (28) is fixedly provided on the top of the gas injection pipe (28), and one end of the lower ventilation pipe (30) extends upward and is connected to the inner cavity of the lower gas collecting hopper (29). The lower ports of the two lower air collecting hoppers (29) extend downward and pass through the lower fixed circular plate (25) and the absorption tank (3) respectively. An air intake pipe (9) is fixedly provided below the absorption tank (3), and one end of the air intake pipe (9) is connected to the lower port of the lower air collecting hopper (29) located below.

2. A tail gas absorption device for bromine production according to claim 1, characterized in that: Two rotating shafts (31) rotatably arranged along a vertical line are symmetrically arranged on both sides of the two lower gas collecting buckets (29) along their axial sections, and a plurality of stirring blades (32) are evenly distributed on the outer wall of the rotating shaft (31) along its axial direction.

3. A tail gas absorption device for bromine production according to claim 2, characterized in that: The secondary absorption component (13) comprises an upper gas collecting hopper (21) coaxially fixed to the top of an upper fixed circular plate (24); a plurality of lower connecting pipes (22) and lower connecting pipes (23) are evenly distributed above the upper fixed circular plate (24) along its circumference and are alternately connected; the lower connecting pipes (22) and the lower connecting pipes (23) are both arc-shaped structures; a plurality of the lower connecting pipes (22) and the lower connecting pipes (23) are spliced ​​into a circular structure and are coaxially arranged with the upper gas collecting hopper (21); A plurality of exhaust holes (37) connected to the inner cavities of the plurality of lower connecting tubes (22) and the lower communicating tubes (23) are evenly distributed on their outer walls, and the exhaust holes (37) are all arranged downwards. The upper port of the upper gas collecting hopper (21) is sealed, and an upper ventilation pipe (12) connected to the inner cavity of the plurality of lower communicating tubes (23) is fixedly provided on their outer walls. One end of the upper ventilation pipe (12) extends upwards and is connected to the inner cavity of the upper gas collecting hopper (21), and the lower port of the upper gas collecting hopper (21) extends downwards and passes through the upper fixed circular plate (24).

4. A tail gas absorption device for bromine production according to claim 3, characterized in that: A plurality of upper connecting pipes (16) and upper connecting pipes (17) are evenly distributed above the upper gas collecting hopper (21) along its circumference and are arranged in an alternating manner. Both the upper connecting pipes (16) and the upper connecting pipes (17) are arc-shaped structures. A plurality of the upper connecting pipes (16) and the upper connecting pipes (17) are spliced ​​into a circular structure and are arranged coaxially with the absorption tank (3). An atomizing nozzle (18) connected to the inner cavity of the upper connecting pipe (16) is fixedly provided on the outer wall of the upper connecting pipe (16), and the water spraying port of the atomizing nozzle (18) is arranged downward.

5. A tail gas absorption device for bromine production according to claim 4, characterized in that: A rotatable driving shaft (15) is coaxially disposed on the inner top of the absorption tank (3); a plurality of rotating blades (14) are evenly distributed along the circumference of the outer wall of the driving shaft (15) located between the atomizing nozzle (18) and the upper gas collecting hopper (21).

6. A tail gas absorption device for bromine production according to claim 5, characterized in that: The cooling assembly (11) comprises a plurality of cold water pipes (35) vertically arranged on the top of the upper fixed circular plate (24); the plurality of cold water pipes (35) are also symmetrically arranged along the axial section of the absorption tank (3); the lower ports of the plurality of cold water pipes (35) all pass through the upper fixed circular plate (24) and extend to the top of the lower fixed circular plate (25); and the outer walls of the cold water pipes (35) are coaxially fixed with a plurality of heat dissipation fins (34) vertically arranged in parallel.

7. A tail gas absorption device for bromine production according to claim 6, characterized in that: A water chiller (1) is fixedly arranged on the side of the absorption tank (3), and the water inlet and the water outlet of the water chiller (1) are respectively provided with a water outlet pipe (33) and a water inlet pipe (36) which are arranged in communication with each other, and one end of the water outlet pipe (33) and the water inlet pipe (36) respectively pass through the absorption tank (3) and extend to the inside. The lower ports of the plurality of cold water pipes (35) pass through the lower fixed circular plate (25) and are all connected to the ports of the water outlet pipe (33), and the upper ports of the plurality of cold water pipes (35) are connected to the ports of the water inlet pipe (36).

8. A tail gas absorption device for bromine production according to claim 7, characterized in that: Three water inlet valves (5) are fixedly provided on the outer wall of the absorption tank (3) and are in communication with the inner cavity thereof. The three water inlet valves (5) are respectively located above and below the upper fixed circular plate (24) and below the lower fixed circular plate (25). An alkaline liquid box (7) and a water pump (8) are fixedly provided on the side of the absorption tank (3) and are arranged in communication with each other. The water outlet of the water pump (8) is connected to three water inlet valves (5) through a water pipe (6).

9. A tail gas absorption device for bromine production according to claim 8, characterized in that: A fixed pipe (20) connected to the inner cavity of one of the upper connecting pipes (17) is fixedly provided on the outer wall thereof, and one end of the fixed pipe (20) is connected to one end of the water inlet valve (5) located at the top.

10. A tail gas absorption device for bromine production according to claim 9, characterized in that: Three drain valves (2) are fixedly provided on the outer wall of the absorption tank (3) and are in communication with the inner cavity thereof. The three drain valves (2) are respectively located below the upper fixed circular plate (24), the lower fixed circular plate (25) and the absorption tank (3). One end of the three drain valves (2) extends upward and passes through the upper fixed circular plate (24), the lower fixed circular plate (25) and the absorption tank (3) respectively.

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