Iodine volatile gas absorption device and method based on ionic liquid curtain circulating system

Abstract

The invention provides an iodine volatile gas absorption device and method based on an ionic liquid curtain circulating system. The iodine volatile gas absorption device comprises a liquid curtain absorption system, an absorbent dynamic stirring and gas removing system, an inflow filter, an inflow pump, an outflow pump, an outflow filter, a water inlet pump support, a water outlet pump support, a filter support and a pipeline. According to the liquid curtain absorption system, the contact area of the absorbent and the iodine gas is increased through the liquid curtain guide plate, and the absorption efficiency is improved. The absorbent dynamic stirring and gas removing system is provided with a magnetic stirrer, air in the absorbent can be effectively removed, and efficient circulation of the absorbent is guaranteed. The system comprises an inflow filter, an inflow pump, an outflow pump and an outflow filter, so that the purity and continuous circulation of the absorbent are ensured. The device absorbs iodine volatile gas in a diffusion mode, and is suitable for iodine gas absorption treatment in a vacuum chamber and a closed space.

Description

Technical Field

[0001] The invention relates to the fields of aerospace propulsion technology and environmental protection treatment technology, and in particular to an iodine volatile gas absorption device and method based on an ionic liquid liquid curtain circulation system. Background Art

[0002] Iodine-based Hall thrusters have gradually become an important choice for deep space exploration, satellite orbit control and other aerospace missions due to their advantages of high specific impulse, long life and low cost. However, iodine as a working fluid for thrusters has the characteristics of volatility and high corrosiveness. Especially in the vacuum chamber experimental environment, the iodine volatile gas generated during the operation of the thruster is very easy to diffuse, forming a corrosive environment, affecting the safety of experimental equipment and surrounding instruments, and even causing harm to the health of personnel. Therefore, how to efficiently and safely handle iodine volatile gas during the experiment has become an urgent problem to be solved.

[0003] At present, the treatment of iodine volatile gas mainly adopts the method of installing an adsorption device or a filtering device in a vacuum chamber. Such devices usually capture the volatile iodine working fluid through physical adsorption materials or filter media, but due to the high activity of iodine gas, the efficiency of such adsorption or filtering methods is not high, and the adsorption saturation speed is fast when the amount of iodine volatilization is large, which can easily cause the filter material to fail or the pressure of the adsorption system to be too high, and it is impossible to maintain efficient absorption for a long time. In addition, the adsorption device has operational complexity during maintenance and replacement, which is easy to cause secondary pollution.

[0004] Therefore, in order to improve the absorption efficiency of iodine volatile gas and ensure the safety of the experimental environment, a system that can quickly and continuously absorb iodine volatile gas is urgently needed, especially for the treatment of a large amount of volatile iodine generated during the experiment. The present invention effectively solves the limitations of traditional iodine gas treatment technology by introducing a circulating liquid absorbent and a liquid liquid curtain absorption system, greatly improves the absorption efficiency of volatile iodine, and ensures the uniformity and dynamic activity of the absorbent through a magnetic stirring system, thereby realizing an efficient and sustainable iodine volatile gas absorption process. Summary of the invention

[0005] In view of the defects in the prior art, the object of the present invention is to provide an iodine volatile gas absorption device and method based on an ionic liquid liquid curtain circulation system.

[0006] According to the present invention, an iodine volatile gas absorption device based on an ionic liquid curtain circulation system comprises: an absorbent dynamic stirring and gas removal system, an inflow filter 7, an inflow pump 8, a liquid curtain absorption system 9, an outflow pump 11, an outflow filter 12, a vacuum chamber 10 and a pipeline 17;

[0007] The liquid curtain absorption system 9, the absorbent dynamic stirring and gas removal system, the inflow filter 7, the inflow pump 8, the outflow pump 11 and the outflow filter 12 are connected via the pipeline 17;

[0008] The absorbent dynamic stirring and gas removal system is connected to the inflow filter 7; the inflow filter 7 is connected to the inflow pump 8; the inflow pump 8 is connected to the liquid-liquid curtain absorption system 9; the liquid-liquid curtain absorption system 9 is connected to the outflow pump 11; the outflow pump 11 is connected to the outflow filter 12; the outflow filter 12 is connected to the absorbent dynamic stirring and gas removal system;

[0009] The liquid curtain absorption system 9 is located in the vacuum chamber 10 .

[0010] Preferably, the absorbent dynamic stirring and gas removal system comprises: a magnetic stirrer fixing base 1, a magnetic stirring base 2, a magnetic stirring bar 3, an absorbent collecting container 4, a breathable membrane 5 and a breathable membrane mounting flange 6;

[0011] The magnetic stirring base 2 is installed on the magnetic stirrer fixing base 1; the absorbent collecting container 4 is placed on the magnetic stirring base 2; the magnetic stirring bar 3 is placed at the bottom of the absorbent collecting container 4; the breathable membrane 5 is installed on the top of the absorbent collecting container 4 through the breathable membrane mounting flange 6; the pipeline connected to the inflow filter 7 penetrates from the breathable membrane mounting flange 6 and the middle of the breathable membrane 5 to the bottom of the absorbent collecting container 4;

[0012] The number of the magnetic stirrers 3 is matched according to the volume of the circulating absorbent.

[0013] Preferably, the liquid curtain absorption system 9 comprises: a liquid curtain guide plate; the liquid curtain guide plate comprises: a liquid curtain guide plate transverse plate 16, a liquid curtain guide plate vertical plate 22 and a liquid curtain guide plate folding edge 21;

[0014] The pipeline connected to the inflow pump 8 is connected to the liquid curtain guide plate transverse plate 16; the liquid curtain guide plate transverse plate 16 is connected to the liquid curtain guide plate vertical plate 22; and a liquid curtain guide plate fold 21 is formed outward at the bottom of the liquid curtain guide plate vertical plate 22.

[0015] Preferably, the width of the liquid curtain guide plate is as close as possible to the diameter of the cross section of the vacuum chamber 10 .

[0016] Preferably, the liquid curtain guide plate horizontal plate 16 has a rectangular or trapezoidal space, so that the liquid absorbent entering through the pipeline is dispersed along the rectangular cavity or trapezoidal cavity and flows evenly into the position of the liquid curtain guide plate vertical plate 22;

[0017] The liquid curtain guide plate vertical plate 22 has a certain slope in the vertical direction.

[0018] Preferably, the inflow filter 7 and the inflow pump 8 are respectively arranged at the absorbent outflow of the absorbent dynamic stirring and gas removal system through a filter support 18 and a water inlet pump support 20, and the absorbent flowing out of the absorbent dynamic stirring and gas removal system first passes through the inflow filter 7 to filter out impurities, and then the absorbent is pumped into the liquid curtain absorption system 9 through the inflow pump 8;

[0019] The outflow filter 12 and the outflow pump 11 are respectively arranged at the absorbent inlet of the absorbent dynamic stirring and gas removal system through the filter support 18 and the water outlet pump support 19. The absorbent flowing out of the liquid curtain absorption system 9 first passes through the outflow pump 11, and then passes through the outflow filter 12 to filter out impurities, and then the absorbent is pumped into the bottom of the absorbent dynamic stirring and gas removal system.

[0020] Preferably, in the iodine volatile gas absorption device based on the ionic liquid curtain circulation system, the liquid curtain absorption system 9 is closest to the iodine working medium thruster 14, and the distance meets the preset requirements, so that the iodine working medium can be absorbed by the liquid curtain absorption system 9 by diffusion.

[0021] Preferably, in the iodine volatile gas absorption device based on the ionic liquid curtain circulation system, a plurality of the liquid curtain absorption systems 9 are connected in parallel; and the plurality of the liquid curtain absorption systems 9 are respectively placed in different directions of the iodine working medium thruster 14 .

[0022] According to an iodine volatile gas absorption method based on an ionic liquid liquid curtain circulation system provided by the present invention, the iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system described above is used to perform the following steps:

[0023] Step S1: selecting a low-volatile solvent as an absorbent and storing it in the absorbent collection container 4;

[0024] Step S2: performing a vacuum operation on the vacuum chamber 10, and when the back pressure of the vacuum chamber meets the preset requirement, starting the absorbent dynamic stirring and gas removal system to remove the air mixed in the absorbent solvent;

[0025] Step S3: starting the liquid-liquid curtain absorption system 9, and delivering the absorbent solvent to the liquid-liquid curtain absorption system 9 through the inflow pump 8. In the liquid-liquid curtain absorption system 9, the absorbent flows into the liquid-liquid curtain guide plate to form a uniform liquid-liquid curtain structure;

[0026] Step S4: The absorbed liquid absorbent is transported to the outflow filter 12 through the outflow pump 11 to remove impurities and then flows back to the absorbent dynamic stirring and gas removal system to form a closed loop.

[0027] Preferably, in the vacuum chamber 10, the volatile iodine gas released by the iodine working medium thruster 14 during operation contacts with the liquid curtain by diffusion and is then absorbed;

[0028] During the absorption process, a magnetic stirrer is used to continuously maintain the uniformity of the absorbent; wherein the magnetic stirrer includes a magnetic stirrer 3 and a magnetic stirring base;

[0029] The air-permeable membrane 5 is used to allow air to be automatically discharged during the stirring process.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention adopts a large-area liquid curtain guide plate to form a uniform liquid curtain structure for the liquid absorbent, which greatly increases the contact area between the volatile iodine gas and the absorbent; compared with the traditional physical adsorption or filtration method, the liquid curtain system can more efficiently capture the diffused iodine working medium, reduce the residual iodine gas and the pollution to the experimental environment, significantly improve the absorption efficiency and reduce the residual iodine gas;

[0032] 2. The present invention designs a dynamic stirring system for the absorbent, which maintains the uniformity of the circulating absorbent through a magnetic stirrer to avoid the local absorption capacity of the absorbent decreasing in a static state; at the same time, the stirring system can effectively remove the air mixed in the absorbent, ensuring that the absorbent always maintains a high absorption capacity during the circulation process;

[0033] 3. The absorbent dynamic stirring and gas removal system of the present invention realizes the function of automatically discharging air during the absorbent circulation process through the breathable membrane design, avoiding the interference of air on the absorption efficiency, thereby further improving the overall absorption effect;

[0034] 4. The present invention effectively solves the risk of secondary pollution caused by frequent replacement of traditional adsorption materials; since the liquid curtain absorption system can operate continuously for a long time and the absorbent can be recycled, the maintenance frequency and difficulty in experimental operation are reduced; in addition, the liquid curtain guide plate is designed with an anti-splashing structure to ensure that the absorbent liquid is smoothly distributed during flow, avoiding splashing caused by thruster plume impact, thereby ensuring the stability and safety of the absorption process;

[0035] 5. The present invention is not only applicable to iodine working medium thruster experiments in vacuum chambers, but can also be used in other closed environments for efficient absorption and treatment of volatile iodine gas; its flexible design enables the system to adapt to different experimental conditions and equipment requirements, and has a wide range of application scenarios;

[0036] 6. The present invention adopts a circulating liquid absorbent, which can maintain continuous absorption capacity during long-term experiments, reduce the frequency of replacement of the adsorption medium, and reduce the use cost and maintenance workload of the experimental equipment;

[0037] 7. The present invention shows higher efficiency and more convenient operation in the absorption and treatment of iodine volatile gas, provides a safe and reliable solution, and effectively solves the shortcomings of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0039] Figure 1 This is a schematic diagram of the principle of the iodine volatile gas absorption method based on the liquid curtain circulation system.

[0040] Figure 2 This is a schematic diagram of the installation of an iodine volatile gas absorption device based on a liquid curtain circulation system.

[0041] Among them, 1. Magnetic stirrer fixing seat; 2. Magnetic stirring base; 3. Magnetic stirrer; 4. Absorbent collection container; 5. Breathable membrane; 6. Breathable membrane mounting flange; 7. Inflow filter; 8. Inflow pump; 9. Liquid curtain absorption system; 10. Vacuum bulkhead; 11. Outflow pump; 12. Outflow filter; 13. Thruster mounting platform; 14. Thruster; 15. Thruster plume; 16. Liquid curtain guide horizontal plate; 17. Pipeline; 18. Filter support; 19. Outlet pump support; 20. Inlet pump support; 21. Liquid curtain guide plate folding edge; 22. Liquid curtain guide plate vertical edge. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] Example 1

[0044] According to the present invention, an iodine volatile gas absorption device based on a liquid curtain circulation system is provided. Figures 1 to 2 As shown, it includes: a liquid curtain absorption system 9, an absorbent dynamic stirring and gas removal system, an inflow filter 7, an inflow pump 8, an outflow pump 11, an outflow filter 12, an inlet pump support 20, an outlet pump support 19, a filter support 18 and a pipeline 17;

[0045] The absorbent dynamic stirring and gas removal system, the inflow filter 7, the inflow pump 8, the liquid curtain absorption system 9, the outflow pump 11 and the outflow filter 12 are connected by a pipeline 17;

[0046] The absorbent dynamic stirring and gas removal system is connected to the inflow filter 7; the inflow filter 7 is connected to the inflow pump 8; the inflow pump 8 is connected to the liquid-liquid curtain absorption system 9; the liquid-liquid curtain absorption system 9 is connected to the outflow pump 11; the outflow pump 11 is connected to the outflow filter 12; the outflow filter 12 is connected to the absorbent dynamic stirring and gas removal system;

[0047] The liquid curtain absorption system is located in the vacuum chamber 10 .

[0048] The liquid curtain absorption system comprises: a liquid curtain guide plate and connecting pipes 17 at the upper and lower ends, wherein the liquid curtain guide plate is mainly divided into a liquid curtain guide plate transverse plate 16, a liquid curtain guide plate vertical plate 22 and a liquid curtain guide plate folding edge 21;

[0049] The absorbent dynamic stirring and gas removal system comprises a magnetic stirrer fixing base 1, a magnetic stirring base 2, a magnetic stirring bar 3, an absorbent collecting container 4, a breathable membrane 5 and a breathable membrane mounting flange 6; the magnetic stirring base 2 is installed on the magnetic stirrer fixing base 1, the absorbent collecting container 4 is placed on the magnetic stirring base 2, the magnetic stirring bar 3 is placed on the bottom of the absorbent collecting container 4, the breathable membrane 5 is installed on the top of the absorbent collecting container 4 through the breathable membrane mounting flange 6, and the connecting pipeline 17 penetrates from the breathable membrane mounting flange 6 and the middle of the breathable membrane 5 to the bottom of the absorbent collecting container 4;

[0050] The width of the liquid curtain guide plate of the liquid curtain absorption system 9 is as close as possible to the diameter of the cross section of the vacuum chamber to increase the contact area between the absorbent and the volatilized iodine working medium, thereby improving the absorption rate; the liquid curtain guide plate transverse plate 16 of the liquid curtain absorption system has a rectangular or trapezoidal space, so that the liquid absorbent entering from the inflow connecting pipeline 17 is dispersed along the rectangular cavity and evenly flows into the position of the liquid curtain guide plate vertical plate 22, and the liquid curtain guide plate vertical plate 22 has a certain slope in the vertical direction to guide the absorbent liquid to flow smoothly, and the liquid curtain guide plate folding edge 21 extends outward to prevent the absorbent droplets flowing down from splashing outward;

[0051] The number of magnetic stirrers 3 in the absorbent dynamic stirring and gas removal system is matched according to the volume of the circulating absorbent, and may include but is not limited to one magnetic stirrer 3;

[0052] The inflow filter 7 and the inflow pump 8 are arranged at the absorbent outflow of the absorbent dynamic stirring and gas removal system through the filter support 18 and the water inlet pump support 20. The absorbent flowing out of the absorbent dynamic stirring and gas removal system first passes through the filter to filter out some impurities, and then the absorbent is pumped into the liquid-liquid curtain absorption system through the inflow pump 8; the outflow filter 12 and the outflow pump 11 are arranged at the absorbent inflow of the absorbent dynamic stirring and gas removal system through the filter support 18 and the water outlet pump support 19. The absorbent flowing out of the liquid-liquid curtain absorption system first passes through the outflow pump 11, and then passes through the outflow filter 12 to filter out impurities, and then the absorbent is pumped into the bottom of the absorbent dynamic stirring and gas removal system.

[0053] The liquid curtain absorption system is kept at a certain distance from the installation position of the iodine working medium thruster 14, so that the iodine working medium is absorbed by the liquid curtain system by diffusion, and the iodine working medium thruster plume 15 is prevented from directly convectively spraying with the liquid curtain system and causing the absorbent to splash;

[0054] The liquid curtain absorption system is placed in front of the absorbent dynamic stirring and gas removal system, the inflow filter 7, the inflow pump 8, the outflow pump 11, the outflow filter 12, the water inlet pump support 20, the water outlet pump support 19, the filter support 18 and most of the pipelines 17, that is, close to the side of the iodine working medium thruster 14, so as to reduce the corrosion of the volatile iodine to other components;

[0055] The iodine volatile gas absorption device based on the liquid curtain circulation system can be connected in parallel with multiple liquid curtain absorption systems 9, which are placed in three or four directions of the iodine working medium thruster to improve the absorption efficiency of the iodine working medium;

[0056] The circulating absorbent liquid of the present invention includes, but is not limited to, ionic liquids, diethylene glycol, glycerol and other low-volatility liquid solvents;

[0057] The application occasions of the present invention include but are not limited to iodine working medium thrusters used only in vacuum chambers, and can also be used for absorbing volatile iodine gas in a closed space.

[0058] According to the present invention, a method for absorbing iodine volatile gas based on an ionic liquid curtain circulation system comprises:

[0059] First, select low volatility solvent, such as ionic liquid, diethylene glycol or glycerine and other low volatility liquid solvent as absorbent and store in absorbent collection container 4, and install other devices of liquid curtain circulation system successively. After completing the installation of iodine volatile gas absorption device based on liquid curtain circulation system, start vacuum chamber vacuumization operation, when vacuum chamber back pressure reaches certain requirements, start absorbent dynamic stirring and gas removal system, effectively remove the air mixed in absorbent solvent under initial state. Next start absorbent liquid curtain circulation system. By inflow pump, absorbent solvent is transported to liquid curtain absorption system. In this system, absorbent flows into liquid curtain guide plate, forms uniform liquid curtain structure. The design of liquid curtain guide plate ensures that absorbent fully contacts with volatilized iodine gas when flowing, thereby greatly increases contact area.

[0060] In the vacuum chamber, the volatile iodine gas released when the iodine working medium thruster is running contacts the liquid curtain by diffusion, and is then effectively absorbed. To improve the absorption efficiency, a magnetic stirrer is arranged in the absorbent collection container to continuously maintain the uniformity of the absorbent. The design of the breathable membrane 3 allows air to be automatically discharged during the stirring process, thereby avoiding the interference of air on the absorption efficiency. In the present embodiment, the magnetic stirrer comprises a magnetic stirring base 2 and a magnetic stirring bar 3.

[0061] The absorbed liquid absorbent is transported to the outflow filter 12 through the outflow pump 11 to remove impurities and then flows back to the absorbent dynamic stirring and gas removal system to form a closed loop. This cycle ensures that the liquid curtain absorption system continues to work and continuously absorbs the volatilized iodine gas, thereby ensuring the safety and stability of the experimental environment.

[0062] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0063] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An iodine volatile gas absorption device based on an ionic liquid curtain circulation system, characterized in that: include: Absorbent dynamic stirring and gas removal system, inflow filter (7), inflow pump (8), liquid curtain absorption system (9), outflow pump (11), outflow filter (12), vacuum chamber (10) and pipeline (17); The liquid curtain absorption system (9), the absorbent dynamic stirring and gas removal system, the inflow filter (7), the inflow pump (8), the outflow pump (11) and the outflow filter (12) are connected via the pipeline (17); The absorbent dynamic stirring and gas removal system is connected to the inflow filter (7); the inflow filter (7) is connected to the inflow pump (8); the inflow pump (8) is connected to the liquid-liquid curtain absorption system (9); the liquid-liquid curtain absorption system (9) is connected to the outflow pump (11); the outflow pump (11) is connected to the outflow filter (12); the outflow filter (12) is connected to the absorbent dynamic stirring and gas removal system; The liquid curtain absorption system (9) is located in the vacuum chamber (10).

2. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 1 is characterized in that: The absorbent dynamic stirring and gas removal system comprises: a magnetic stirrer fixing base (1), a magnetic stirring base (2), a magnetic stirrer (3), an absorbent collecting container (4), a breathable membrane (5) and a breathable membrane mounting flange (6); The magnetic stirring base (2) is mounted on the magnetic stirring device fixing base (1); the absorbent collecting container (4) is placed on the magnetic stirring base (2); the magnetic stirring bar (3) is placed at the bottom of the absorbent collecting container (4); the air permeable membrane (5) is mounted on the top of the absorbent collecting container (4) through the air permeable membrane mounting flange (6); the pipeline connected to the inflow filter (7) penetrates from the air permeable membrane mounting flange (6) and the middle of the air permeable membrane (5) to the bottom of the absorbent collecting container (4); The number of the magnetic stirrers (3) is matched according to the volume of the circulating absorbent.

3. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 1 is characterized in that: The liquid curtain absorption system (9) comprises: a liquid curtain guide plate; the liquid curtain guide plate comprises: a liquid curtain guide plate transverse plate (16), a liquid curtain guide plate vertical plate (22) and a liquid curtain guide plate folding edge (21); The pipeline connected to the inflow pump (8) is connected to the liquid-liquid curtain guide plate transverse plate (16); the liquid-liquid curtain guide plate transverse plate (16) is connected to the liquid-liquid curtain guide plate vertical plate (22); and a liquid-liquid curtain guide plate fold (21) is formed outwardly at the bottom of the liquid-liquid curtain guide plate vertical plate (22).

4. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 3 is characterized in that: The width of the liquid curtain guide plate is as close as possible to the diameter of the cross section of the vacuum chamber (10).

5. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 3 is characterized in that: The liquid curtain guide plate transverse plate (16) has a rectangular or trapezoidal space, so that the liquid absorbent entering through the pipeline is dispersed along the rectangular cavity or trapezoidal cavity and flows evenly to the position of the liquid curtain guide plate vertical plate (22); The liquid curtain guide plate vertical plate (22) has a certain slope in the vertical direction.

6. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 1 is characterized in that: The inflow filter (7) and the inflow pump (8) are respectively arranged at the absorbent outflow of the absorbent dynamic stirring and gas removal system through a filter support (18) and a water inlet pump support (20); the absorbent flowing out of the absorbent dynamic stirring and gas removal system first passes through the inflow filter (7) to filter out impurities, and then the absorbent is pumped into the liquid curtain absorption system (9) through the inflow pump (8); The outflow filter (12) and the outflow pump (11) are respectively arranged at the absorbent inlet of the absorbent dynamic stirring and gas removal system through a filter support (18) and a water outlet pump support (19). The absorbent flowing out of the liquid curtain absorption system (9) first passes through the outflow pump (11), and then passes through the outflow filter (12) to filter out impurities, and then the absorbent is pumped into the bottom of the absorbent dynamic stirring and gas removal system.

7. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 1 is characterized in that: In the iodine volatile gas absorption device based on the ionic liquid curtain circulation system, the liquid curtain absorption system (9) is closest to the iodine working medium thruster (14), and the distance meets the preset requirements, so that the iodine working medium can be absorbed by the liquid curtain absorption system (9) by diffusion.

8. The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to claim 1 is characterized in that: In the iodine volatile gas absorption device based on the ionic liquid curtain circulation system, a plurality of the liquid curtain absorption systems (9) are connected in parallel; the plurality of the liquid curtain absorption systems (9) are respectively placed in different directions of the iodine working medium thruster (14).

9. A method for absorbing iodine volatile gas based on an ionic liquid curtain circulation system, characterized in that: The iodine volatile gas absorption device based on the ionic liquid liquid curtain circulation system according to any one of claims 1 to 8 is used to perform the following steps: Step S1: selecting a low-volatility solvent as an absorbent and storing it in the absorbent collection container (4); Step S2: performing a vacuum operation on the vacuum chamber (10), and when the back pressure of the vacuum chamber meets the preset requirement, starting the absorbent dynamic stirring and gas removal system to remove the air mixed in the absorbent solvent; Step S3: starting the liquid-liquid curtain absorption system (9), delivering the absorbent solvent to the liquid-liquid curtain absorption system (9) through the inflow pump (8), wherein the absorbent flows into the liquid-liquid curtain guide plate in the liquid-liquid curtain absorption system (9) to form a uniform liquid-liquid curtain structure; Step S4: The absorbed liquid absorbent is transported to the outflow filter (12) through the outflow pump (11) to remove impurities and then flows back to the absorbent dynamic stirring and gas removal system to form a closed loop.

10. The iodine volatile gas absorption method based on the ionic liquid liquid curtain circulation system according to claim 9, characterized in that: In the vacuum chamber (10), the volatile iodine gas released during operation of the iodine working medium thruster (14) contacts the liquid curtain by diffusion and is then absorbed; During the absorption process, a magnetic stirrer is used to continuously maintain the uniformity of the absorbent; wherein the magnetic stirrer comprises a magnetic stirrer (3) and a magnetic stirring base; The air permeable membrane (5) is used to automatically discharge air during the stirring process.

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