Indoor simulation experiment platform for air blowing method bromine extraction

Abstract

This utility model relates to the field of chemical technology, and in particular to an indoor simulation experimental platform for bromine extraction using the air blowing method. The platform includes a reaction tank, a mother liquor tank, a first circulation tank, a second circulation tank, a collection liquid tank, a blowing tower, an absorption tower, a purification tower, and a mist eliminator. Compared to traditional indoor simulation experimental platforms for bromine extraction, this utility model improves the controllability and stability of the chlorine gas inlet reaction through the coordinated use of the reaction tank, jet circulation pump, second regulating valve, first regulating valve, and jet injector. The coordinated use of the reaction tank, mother liquor tank, first circulation tank, second circulation tank, collection liquid tank, blowing tower, absorption tower, purification tower, and mist eliminator improves the extraction quality. The blowing tower, absorption tower, purification tower, and mist eliminator adopt an upper and lower split structure, facilitating the replacement of the packing material according to different experimental needs. This improves the operational convenience of the indoor simulation experiment for bromine extraction using the air blowing method, reduces experimental costs, and enhances the adaptability of the experimental platform.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to an indoor simulation experimental platform for bromine extraction by air blowing method. Background Technology

[0002] Bromine, as an important basic chemical raw material, has wide applications in industries such as pesticides, pharmaceuticals, petroleum, and fuels. Bromine is one of the basic raw materials for the production of chemical products such as flame retardants, biocides, and photosensitive materials. At present, the domestic industrial bromine extraction technology mainly adopts the air blowing method. The core of this process is the air blowing enrichment step. In this step, factors such as raw material concentration, absorbent type, tower internal components, and operating parameters will have a significant impact on air blowing efficiency and final product quality.

[0003] For a long time, due to the lack of effective indoor simulation experimental devices and methods, it has been difficult to accurately obtain the key parameters of the air-blowing bromine extraction process in a laboratory environment. Therefore, technical upgrades can only be carried out after the production plant is built, through the commissioning and optimization of the industrial-scale plant. This "build first, optimize later" model not only increases production costs but also causes huge waste of resources. With the increasing demand for high efficiency, safety, and green production in industrial production, it is particularly urgent to develop an indoor experimental device that can simulate the actual production environment so that process parameters can be optimized and verified at the beginning of industrialization design, thereby improving production efficiency and product quality, reducing production costs and resource waste, and reducing trial and error costs in industrial production.

[0004] Currently, bromine extraction experiments are typically conducted only after the production facility has been built, through the commissioning and optimization of the industrial-scale equipment. This results in complex bromine extraction operations, low adaptability, high experimental costs, and significant resource waste. Utility Model Content

[0005] To overcome the problem of lacking effective indoor simulation experimental devices and methods, making it difficult to accurately obtain key parameters of the air-blowing bromine extraction process in a laboratory environment.

[0006] The technical solution of this utility model is as follows: an indoor simulation experimental platform for bromine extraction by air blowing, comprising a reaction tank, a mother liquor tank, a first circulation tank, a second circulation tank, a collection tank, a blowing tower, an absorption tower, a purification tower, and a mist eliminator. A pipe is inserted into the side wall of the reaction tank and connects to the top of the blowing tower. A pipe is inserted into the bottom of the blowing tower and connects to the mother liquor tank. A pipe is inserted into the top of the blowing tower and connects to the absorption tower. A pipe is inserted into the side wall of the bottom of the absorption tower and connects to the bottom of the purification tower. A pipe is inserted into the top of the purification tower and connects to the top of the mist eliminator. A pipe is inserted into the side wall of the first circulation tank and connects to the mother liquor tank. Several pipes are connected to the top and bottom of the absorption tower respectively. Several pipes are inserted into the side wall of the second circulation tank and connected to the top and bottom of the purification tower respectively. A pipe is inserted into the bottom of the demister tower and connected to the collection liquid tank. A jet circulation pump is installed on the side wall of the reaction tank. A second regulating valve is installed at the end of the jet circulation pump. A first regulating valve is installed at the end of the second regulating valve. A jet ejector is installed at the end of the first regulating valve. A variable frequency fan is installed at the bottom of the blow-out tower. A sixth regulating valve is installed at the output end of the variable frequency fan. A second flow meter is installed at the end of the sixth regulating valve.

[0007] Furthermore, the output end of the jet injector is connected to the reaction tank. The reaction tank, jet circulation pump, second regulating valve, first regulating valve and jet injector are connected by pipeline. The other end of the first regulating valve is equipped with a chlorine inlet. The side wall of the reaction tank is connected to a raw material liquid port and an acid liquid port. By controlling the opening of the first regulating valve, the chlorine gas flow rate can be controlled and the stability of the chlorine gas introduction can be ensured.

[0008] Furthermore, an acidification oxidizing liquid pump, a fifth regulating valve, and a first flow meter are sequentially installed on the pipeline between the reaction tank and the blow-out tower. A fourth regulating valve is installed on the pipeline between the acidification oxidizing liquid pump and the fifth regulating valve. The other end of the fourth regulating valve is connected to a pipeline that communicates with the reaction tank. A first sampling port is installed on the pipeline between the acidification oxidizing liquid pump and the fifth regulating valve. A third regulating valve is installed at the bottom of the reaction tank, which improves the accuracy of the inlet flow control of the blow-out tower.

[0009] Furthermore, a pipe is inserted into the bottom of the blowing tower and connected in sequence to the second flow meter, the sixth regulating valve and the variable frequency fan. A differential pressure gauge is installed on the side wall of the blowing tower, and the two ends of the differential pressure gauge are connected to the top and bottom of the blowing tower respectively.

[0010] Furthermore, a seventh regulating valve is installed on the pipeline between the mother liquor tank and the blow-out tower, a second sampling port is installed on the pipeline between the seventh regulating valve and the blow-out tower, and an eighth regulating valve is installed at the bottom of the mother liquor tank, which improves the convenience of mother liquor sampling.

[0011] Furthermore, a ninth regulating valve is installed on the pipe connecting the first circulation tank and the bottom of the absorption tower. A first circulation absorption pump, a twelfth regulating valve, and a third flow meter are sequentially installed on the pipe connecting the first circulation tank and the top of the absorption tower. A third sampling port is installed on the pipe between the first circulation absorption pump and the twelfth regulating valve. An eleventh regulating valve is installed on the pipe between the third sampling port and the twelfth regulating valve. The other end of the eleventh regulating valve is connected to the first circulation tank. A tenth regulating valve is installed at the bottom of the first circulation tank, which improves the convenience of liquid circulation inside the absorption tower.

[0012] Furthermore, a thirteenth regulating valve is installed on the pipe connecting the second circulation tank and the bottom of the purification tower. A second circulation absorption pump, a seventeenth regulating valve, and a fourth flow meter are installed on the pipe connecting the second circulation tank and the top of the purification tower. A fourth sampling port is installed on the pipe between the second circulation absorption pump and the seventeenth regulating valve. A three-way pipe is inserted into one end of the seventeenth regulating valve and connected to the second circulation tank and the first circulation tank respectively. A fifteenth regulating valve is installed at the end of the three-way pipe near the second circulation tank, a sixteenth regulating valve is installed at the end of the three-way pipe near the first circulation tank, and a fourteenth regulating valve is installed at the bottom of the second circulation tank, which improves the stability of the liquid circulation inside the purification tower.

[0013] Furthermore, an eighteenth regulating valve is installed on the pipe connecting the bottom of the collection tank and the demister tower, a nineteenth regulating valve is installed on the pipe connecting the bottom of the collection tank, and an exhaust pipe is inserted into the side wall at the bottom of the demister tower.

[0014] The beneficial effects of this utility model are:

[0015] Compared to traditional indoor bromine extraction simulation platforms, this new platform improves the controllability and stability of the chlorine gas inlet reaction through the combination of a reaction tank, jet circulation pump, second regulating valve, first regulating valve, and jet injector. The combination of a reaction tank, mother liquor tank, first circulation tank, second circulation tank, collection liquid tank, blow-out tower, absorption tower, purification tower, and mist eliminator enhances extraction quality. The blow-out tower, absorption tower, purification tower, and mist eliminator feature a split-type structure, facilitating the replacement of packing materials according to different experimental needs. This improves the operational convenience of the indoor bromine extraction simulation experiment using the air blowing method, reduces experimental costs, and enhances the platform's adaptability. Furthermore, the combination of the first circulation absorption pump, twelfth regulating valve, and third flow meter ensures sufficient contact between the gas and liquid phases within the absorption tower. The combination of the second circulation absorption pump, seventeenth regulating valve, and fourth flow meter improves the stability of liquid circulation within the purification tower, thereby increasing reaction efficiency and quality. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic diagram of the overall planar structure of the bromine extraction indoor simulation experimental platform of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Reaction tank; 2. Mother liquor tank; 3. First circulation tank; 4. Second circulation tank; 5. Collection tank; 6. Blowout tower; 7. Absorption tower; 8. Purification tower; 9. Foam eliminator; 10. Jet circulation pump; 11. Acidification and oxidation liquid pump; 12. First circulation absorption pump; 13. Second circulation absorption pump; 14. Differential pressure gauge; 15. Variable frequency fan; 16. First flow meter; 17. Second flow meter; 18. Third flow meter; 19. Fourth flow meter; 20. Jet ejector; 21. First regulating valve; 22. Second regulating valve; 23. Third regulating valve; 24. Fourth regulating valve; 25. Fifth regulating valve; 26. Sixth regulating valve; 27. Seventh regulating valve; 28. Eighth regulating valve; 29. ​​Ninth regulating valve; 30. Tenth regulating valve; 31. Eleventh regulating valve; 32. Twelfth regulating valve; 33. Thirteenth regulating valve; 34. Fourteenth regulating valve; 35. Fifteenth regulating valve; 36. Sixteenth regulating valve; 37. Seventeenth regulating valve; 38. Eighteenth regulating valve; 39. Nineteenth regulating valve; 40. First sampling port; 41. Second sampling port; 42. Third sampling port; 43. Fourth sampling port. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please refer to Figure 1An indoor simulation experimental platform for bromine extraction using an air blowing method is disclosed, comprising a reaction tank 1, a mother liquor tank 2, a first circulation tank 3, a second circulation tank 4, a collection liquid tank 5, a blowing tower 6, an absorption tower 7, a purification tower 8, and a mist eliminator 9. A pipe is inserted into the side wall of the reaction tank 1, connecting to the top of the blowing tower 6. Multiple monitoring probes, including a pH probe, a temperature probe, and an ORP probe, are installed on the inner side wall of the reaction tank 1. All monitoring probes are coupled to a PLC controller for real-time monitoring of reaction conditions. The temperature probe is interlocked with the heating device to ensure precise adjustment of the reaction temperature. The main body of the blowing tower 6 is a hollow organic glass column. The transparency of the blowing tower 6 facilitates real-time observation of changes in phenomena during the air blowing experiment. The blowing tower 6 adopts a split upper and lower structure. The upper column head is detachable, and the bottom of the blow-out column 6 is detachable, with a lower column head. The upper and lower column heads are designed with a snap-on cap structure, facilitating the replacement of the packing material and adjustment of its height according to different experimental requirements. An acidification and oxidation liquid pump 11, a fifth regulating valve 25, and a first flow meter 16 are sequentially installed on the pipeline between the reaction tank 1 and the blow-out column 6. A fourth regulating valve 24 is installed on the pipeline between the acidification and oxidation liquid pump 11 and the fifth regulating valve 25, with the other end of the fourth regulating valve 24 connected to the reaction tank 1 via a pipe. A first sampling port 40 is installed on the pipeline between the acidification and oxidation liquid pump 11 and the fifth regulating valve 25; opening the first sampling port 40 allows the discharge of the liquid for testing. A third regulating valve 23 is installed at the bottom of the reaction tank 1, improving the efficiency of the blow-out column. The accuracy of inlet flow control is ensured. A pipe is inserted at the bottom of the blowing tower 6, connecting it to the mother liquor tank 2. A pipe is inserted at the top of the blowing tower 6, connecting it to the absorption tower 7. The main body of the absorption tower 7 is similar to that of the blowing tower 6, consisting of a hollow plexiglass column. Inside the absorption tower 7, from top to bottom, are arranged a liquid distributor, a packing layer, and a packing support frame to ensure sufficient contact between the gas and liquid phases. A pipe is inserted on the side wall at the bottom of the absorption tower 7, connecting it to the bottom of the purification tower 8. The main body of the purification tower 8 is similar to that of the blowing tower 6, consisting of a hollow plexiglass column with a split upper and lower structure, facilitating the replacement of packing materials and adjustment of packing height according to different experimental needs. Inside the purification tower 8, from top to bottom, are arranged a liquid distributor, a packing layer, and a packing support frame to ensure sufficient contact between the gas and liquid phases. The gas and liquid phases are in full contact. A pipe is inserted at the top of the purification tower 8, connecting it to the top of the mist eliminator tower 9. The mist eliminator tower 9 has a similar material and structure to the blowing tower 6, with a split upper and lower design. Inside the mist eliminator tower 9, from top to bottom, there are packing layers and packing support frames. Several pipes are inserted into the side wall of the first circulation tank 3, connecting it to the top and bottom of the absorption tower 7. Several pipes are inserted into the side wall of the second circulation tank 4, connecting it to the top and bottom of the purification tower 8. A pipe is inserted at the bottom of the mist eliminator tower 9, connecting it to the collection tank 5. An exhaust pipe is inserted into the side wall of the bottom of the mist eliminator tower 9. A jet circulation pump 10 is fixed to the side wall of the reaction tank 1. A second regulating valve 22 is installed at the end of the jet circulation pump 10, and a first regulating valve 21 is installed at the end of the second regulating valve 22.A jet injector 20 is installed at the end of the first regulating valve 21. The output end of the jet injector 20 is connected to the reaction tank 1. The reaction tank 1, the jet circulation pump 10, the second regulating valve 22, the first regulating valve 21, and the jet injector 20 are connected by a pipeline to facilitate circulation. A chlorine inlet is installed at the other end of the first regulating valve 21. A raw material liquid inlet and an acid liquid inlet are inserted into the side wall of the reaction tank 1. The acid liquid is used to adjust the pH value in the reaction tank 1, which improves the stability of the chlorine gas introduction, thereby enabling the chlorine gas to carry out a stable chemical reaction inside the reaction tank 1. The fourth regulating valve 24 and When the fifth regulating valve 25 is closed, the liquid material achieves full reflux, ensuring thorough mixing of the raw and auxiliary materials in the acidification oxidation reaction tank 1 and guaranteeing the bromide ion oxidation efficiency. A variable frequency fan 15 is installed at the bottom of the blowing tower 6, and a sixth regulating valve 26 is installed at the output end of the variable frequency fan 15. A second flow meter 17 is installed at the end of the sixth regulating valve 26. Pipes are connected to the bottom of the blowing tower 6, sequentially connecting to the second flow meter 17, the sixth regulating valve 26, and the variable frequency fan 15. A differential pressure gauge 14 is installed on the side wall of the blowing tower 6, with its two ends connected to the top and bottom of the blowing tower 6, respectively.

[0020] A seventh regulating valve 27 is installed on the pipeline between the mother liquor tank 2 and the blow-out tower 6. A second sampling port 41 is installed on the pipeline between the seventh regulating valve 27 and the blow-out tower 6. An eighth regulating valve 28 is installed at the bottom of the mother liquor tank 2, which improves the convenience of mother liquor sampling.

[0021] A ninth regulating valve 29 is installed on the pipe connecting the bottom of the first circulation tank 3 and the absorption tower 7. A first circulation absorption pump 12, a twelfth regulating valve 32, and a third flow meter 18 are sequentially installed on the pipe connecting the top of the first circulation tank 3 and the absorption tower 7. A third sampling port 42 is installed on the pipe between the first circulation absorption pump 12 and the twelfth regulating valve 32. An eleventh regulating valve 31 is installed on the pipe between the third sampling port 42 and the twelfth regulating valve 32. The other end of the eleventh regulating valve 31 is connected to the first circulation tank 3. A tenth regulating valve 30 is installed at the bottom of the first circulation tank 3. This improves the convenience of liquid circulation inside the absorption tower 7. The spray density of the absorption tower can be accurately set through the twelfth regulating valve 32 and the third flow meter 18 to optimize the absorption effect.

[0022] A thirteenth regulating valve 33 is installed on the pipe connecting the bottom of the second circulation tank 4 and the purification tower 8. A second circulation absorption pump 13, a seventeenth regulating valve 37, and a fourth flow meter 19 are installed on the pipe connecting the top of the second circulation tank 4 and the purification tower 8. A fourth sampling port 43 is installed on the pipe between the second circulation absorption pump 13 and the seventeenth regulating valve 37. A three-way pipe is inserted into one end of the seventeenth regulating valve 37 and connected to the second circulation tank 4 and the first circulation tank 3 respectively. A fifteenth regulating valve 35 is installed at the end of the three-way pipe near the second circulation tank 4, and a sixteenth regulating valve 36 is installed at the end of the three-way pipe near the first circulation tank 3. A fourteenth regulating valve 34 is installed at the bottom of the second circulation tank 4. This improves the stability of the liquid circulation inside the purification tower 8. The spray density of the purification tower can be accurately set through the seventeenth regulating valve 37 and the fourth flow meter 19 to optimize the absorption effect.

[0023] The eighteenth regulating valve 38 is installed on the pipe connecting the bottom of the collection tank 5 and the foam tower 9, and the nineteenth regulating valve 39 is installed on the pipe connecting the bottom of the collection tank 5.

[0024] When using the bromine extraction indoor simulation experimental platform, the operator first connects the external power supply, then connects 200L of seawater or other bromine-containing raw material liquid to the acidification oxidation reaction tank 1 through the pipeline, then adds hydrochloric acid or sulfuric acid to adjust the pH to about 3, opens the first regulating valve 21 and the second regulating valve 22, and introduces a certain amount of chlorine gas into the acidification oxidation reaction tank according to the experimental chlorine ratio through the jet circulation pump 10 and the jet ejector 20. Then, the jet circulation pump 10 and the first regulating valve 21 and the second regulating valve 22 are closed, and the second regulating valve 22 is started. The fifth regulating valve 25 is closed and the fourth regulating valve 24 is opened to achieve full reflux of the material liquid. The hydraulic stirring of the pump causes the bromide ions to react and generate elemental bromine. After a period of time, the first sampling port 40 is opened to take a sample and analyze the oxidation rate at this time.

[0025] When the bromide ion oxidation rate in the acidified oxidizing solution meets the requirements of subsequent experiments, the first circulating absorption pump 12 and the eleventh regulating valve 31 are started. By adjusting the opening of the twelfth regulating valve 32, the flow rate of the third flow meter 18 is controlled, and the absorbent enters the absorption tower 7. The ninth regulating valve 29 is opened, and the absorbent returns to the first circulating tank 3. Through continuous circulation, the bromide ions in the absorbent are enriched. The second circulating absorption pump 13 and the fifth regulating valve 25 are started. By adjusting the opening of the seventeenth regulating valve 37, the flow rate of the fourth flow meter 19 is controlled, and the purified solution enters the purification tower 8. The thirteenth regulating valve 33 is opened, and the absorbent returns to the mist eliminator 9. Through continuous circulation, the air after absorption is purified.

[0026] After confirming that the blowing tower 6 and the absorption tower 7 are operating stably, the fifth regulating valve 25 is gradually opened. The flow rate entering the blowing tower 6 is observed and adjusted through the first flow meter 16 to change the spray density of the blowing tower. The frequency converter fan 15 is turned on and the frequency of the fan is observed and adjusted through the second flow meter 17 to adjust the air volume entering the blowing tower so that it meets the gas-liquid ratio requirements of the air blowing experiment. Then the seventh regulating valve 27 is opened to blow out the mother liquor into the absorption tower 7. According to the experimental requirements, samples are taken from the second sampling port 41 to analyze the blowing rate. The differential pressure gauge 14 can display the pressure drop of the tower group under different gas-liquid ratios, spray densities, and other conditions.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An indoor simulation experimental platform for bromine extraction using the air blowing method, characterized in that, The system includes a reaction tank (1), a mother liquor tank (2), a first circulation tank (3), a second circulation tank (4), a collection tank (5), a blowout tower (6), an absorption tower (7), a purification tower (8), and a condensate eliminator (9). A pipe is inserted into the side wall of the reaction tank (1) and connects to the top of the blowout tower (6). A pipe is inserted into the bottom of the blowout tower (6) and connects to the mother liquor tank (2). A pipe is inserted into the top of the blowout tower (6) and connects to the absorption tower (7). The absorption tower (7)... A pipe is inserted into the side wall at the bottom of the first circulation tank (3) and connected to the bottom of the purification tower (8). A pipe is inserted into the top of the purification tower (8) and connected to the top of the demister tower (9). Several pipes are inserted into the side wall of the first circulation tank (3) and connected to the top and bottom of the absorption tower (7). Several pipes are inserted into the side wall of the second circulation tank (4) and connected to the top and bottom of the purification tower (8). A pipe is inserted into the bottom of the demister tower (9) and connected to the collection tank (5). A jet circulation pump (10) is installed on the side wall of the reaction tank (1). A second regulating valve (22) is installed at the end of the jet circulation pump (10). A first regulating valve (21) is installed at the end of the second regulating valve (22). A jet injector (20) is installed at the end of the first regulating valve (21). A variable frequency fan (15) is installed at the bottom of the blow-out tower (6). A sixth regulating valve (26) is installed at the output end of the variable frequency fan (15). A second flow meter (17) is installed at the end of the sixth regulating valve (26).

2. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: The output end of the ejector (20) is connected to the reaction tank (1). The reaction tank (1), the jet circulation pump (10), the second regulating valve (22), the first regulating valve (21) and the ejector (20) are connected by a pipeline. The other end of the first regulating valve (21) is equipped with a chlorine inlet. The side wall of the reaction tank (1) is connected to a raw material liquid inlet and an acid liquid inlet.

3. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: An acidification oxidizing liquid pump (11), a fifth regulating valve (25), and a first flow meter (16) are installed sequentially on the pipeline between the reaction tank (1) and the blow-out tower (6). A fourth regulating valve (24) is installed on the pipeline between the acidification oxidizing liquid pump (11) and the fifth regulating valve (25). The other end of the fourth regulating valve (24) is connected to a pipeline that communicates with the reaction tank (1). A first sampling port (40) is installed on the pipeline between the acidification oxidizing liquid pump (11) and the fifth regulating valve (25). A third regulating valve (23) is installed at the bottom of the reaction tank (1).

4. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: The bottom end of the blow-out tower (6) is connected to a pipe that is connected in sequence to the second flow meter (17), the sixth regulating valve (26) and the variable frequency fan (15). A differential pressure gauge (14) is installed on the side wall of the blow-out tower (6), and the two ends of the differential pressure gauge (14) are connected to the top and bottom ends of the blow-out tower (6) respectively.

5. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: A seventh regulating valve (27) is installed on the pipeline between the mother liquor tank (2) and the blow-out tower (6). A second sampling port (41) is installed on the pipeline between the seventh regulating valve (27) and the blow-out tower (6). An eighth regulating valve (28) is installed at the bottom of the mother liquor tank (2).

6. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: A ninth regulating valve (29) is installed on the pipe connecting the bottom of the first circulation tank (3) and the absorption tower (7). A first circulation absorption pump (12), a twelfth regulating valve (32) and a third flow meter (18) are installed sequentially on the pipe connecting the top of the first circulation tank (3) and the absorption tower (7). A third sampling port (42) is installed on the pipe between the first circulation absorption pump (12) and the twelfth regulating valve (32). An eleventh regulating valve (31) is installed on the pipe between the third sampling port (42) and the twelfth regulating valve (32). The other end of the eleventh regulating valve (31) is connected to the first circulation tank (3). A tenth regulating valve (30) is installed at the bottom of the first circulation tank (3).

7. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: A thirteenth regulating valve (33) is installed on the pipe connecting the bottom of the second circulation tank (4) and the purification tower (8). A second circulation absorption pump (13), a seventeenth regulating valve (37) and a fourth flow meter (19) are installed on the pipe connecting the top of the second circulation tank (4) and the purification tower (8). A fourth sampling port (43) is installed on the pipe between the second circulation absorption pump (13) and the seventeenth regulating valve (37). A three-way pipe is inserted into one end of the seventeenth regulating valve (37) and connected to the second circulation tank (4) and the first circulation tank (3) respectively. A fifteenth regulating valve (35) is installed at the end of the three-way pipe near the second circulation tank (4). A sixteenth regulating valve (36) is installed at the end of the three-way pipe near the first circulation tank (3). A fourteenth regulating valve (34) is installed at the bottom of the second circulation tank (4).

8. The indoor simulation experimental platform for bromine extraction by air blowing method according to claim 1, characterized in that: An eighteenth regulating valve (38) is installed on the pipe connecting the bottom of the collection tank (5) and the demister (9). A nineteenth regulating valve (39) is installed on the pipe connecting the bottom of the collection tank (5). An exhaust pipe is inserted into the side wall at the bottom of the demister (9).

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