Argon recovery device capable of stable rectification and working method therefor

Abstract

The present application discloses an argon recovery device capable of stable rectification and a working method therefor. The argon recovery device capable of stable rectification comprises a rectification system. The rectification system comprises a temperature regulating mechanism and an argon extraction unit. The argon extraction unit comprises a pure argon column, an argon column reboiler, a pure argon pipe group, a first valve group, and a stabilizing member. The stabilizing member comprises a stabilizing assembly and a temperature measuring element. The stabilizing assembly comprises a nitrogen compressor and a nitrogen reboiler. In the present application, on the basis of the amount of pure liquid argon obtained from rectification in the pure argon column and the amount of pure argon vaporized by heat exchange with cooled and dried crude argon in the argon column reboiler, the supply amount of dried nitrogen is adaptively adjusted by means of the stabilizing member to adjust the amount of pure argon supplied by the nitrogen reboiler to the pure argon column, so as to jointly match the actual working conditions of the argon column reboiler, thereby improving the anti-interference capability of the argon extraction unit, ensuring the stability of the rectification process, and further ensuring the purity of the obtained pure argon.

Description

Argon recovery equipment capable of stable distillation and its working method Technical Field

[0001] This application relates to the field of argon recovery technology, and in particular to argon recovery equipment and its working method that can be stably distilled. Background Technology

[0002] Currently, the Czochralski method, which uses reduced pressure crystal pulling, produces a large amount of crude argon gas during the production of monocrystalline silicon. Recycling and utilizing this argon gas is of great practical significance.

[0003] Patent CN116332139A discloses an argon recovery device that integrates high-purity nitrogen and enhances efficiency, and a method for using it. After pretreatment, crude argon is cooled by a first heat exchanger to obtain dry crude argon. The dry crude argon is then transported to the reboiler at the bottom of the argon column for liquefaction. The fluid output from the reboiler is depressurized and then transported to the upper part of the argon column to participate in distillation.

[0004] Due to temperature errors during pretreatment and variations in the composition of crude argon, the composition of dried crude argon will fluctuate. Since different gas components have different liquefaction temperatures, the temperature of dried crude argon will fluctuate significantly. This causes large fluctuations in the heat load of the reboiler in the argon refining column, which in turn leads to unstable distillation conditions and results in the purity of the obtained argon product not being guaranteed.

[0005] In addition, the temperature deviation of the heat exchange in the first heat exchanger can also lead to unstable operation of the argon column reboiler, which in turn affects the distillation. Summary of the Invention

[0006] To address the aforementioned technical problems and achieve at least one advantage of this application, this application provides a stable distillation-enabled argon recovery device, the stable distillation-enabled argon recovery device comprising a distillation system, the distillation system comprising:

[0007] A temperature control mechanism, comprising a temperature control component and a conduit assembly, wherein the temperature control component includes a main heat exchanger, and the conduit assembly includes a feed pipe and a nitrogen pipe assembly. The main heat exchanger is mounted on the feed pipe, and dry crude argon gas is introduced into the main heat exchanger through the feed pipe and discharged after being cooled in the main heat exchanger. The nitrogen pipe assembly includes a first nitrogen conduit.

[0008] Argon extraction unit, the argon extraction unit comprising:

[0009] Argon refining tower;

[0010] An argon reboiler is installed inside the refined argon column and located at the bottom of the column. The argon reboiler is connected to one end of the feed pipe. The cooled and dried crude argon gas obtained by heat exchange in the main heat exchanger is introduced into the argon reboiler through the portion of the feed pipe located between the main heat exchanger and the argon reboiler. The cooled and dried crude argon gas is liquefied in the argon reboiler to obtain crude liquid argon.

[0011] The refined argon tube assembly includes a first inlet tube, a pure liquid argon connecting tube, and a pure argon gas connecting tube. The two ends of the first inlet tube are respectively connected to the lower end of the argon tower reboiler and the upper end of the refined argon tower.

[0012] The first valve group includes a crude liquid argon throttling valve, which is installed on the first inlet pipe. Crude liquid argon enters the first inlet pipe from the argon tower reboiler and flows through the crude liquid argon throttling valve. After being depressurized by the crude liquid argon throttling valve, it is introduced into the refined argon tower. After being depressurized, the crude liquid argon is introduced into the refined argon tower and then distilled to obtain pure liquid argon placed at the bottom of the tower and an argon-nitrogen mixture rising to the top of the tower. The pure liquid argon serves as a cold source to liquefy the cooled and dried crude argon gas in the argon tower reboiler and exchanges heat with the cooled and dried crude argon gas to partially vaporize it as part of the argon-nitrogen mixture.

[0013] The stabilizing component includes:

[0014] The stabilization component includes:

[0015] A nitrogen compressor is provided, with one end of the first nitrogen conduit connected to the nitrogen compressor. The main heat exchanger is installed on the first nitrogen conduit. The nitrogen compressor introduces dry nitrogen into the first nitrogen conduit, and the dry nitrogen is introduced into the main heat exchanger through the first nitrogen conduit to exchange heat and cool down in the main heat exchanger. The nitrogen compressor can operate at variable speed to adjust the flow rate of the dry nitrogen directed to the main heat exchanger.

[0016] A nitrogen reboiler is installed at the other end of the first nitrogen gas inlet pipe. Cooled and dried nitrogen gas obtained from heat exchange in the main heat exchanger is introduced into the nitrogen reboiler through the portion of the first nitrogen gas inlet pipe located between the nitrogen reboiler and the main heat exchanger. The two ends of a pure liquid argon connecting pipe are respectively connected to the nitrogen reboiler and the lower end of the argon purification column. A portion of the pure liquid argon in the argon purification column is introduced into the nitrogen reboiler through the pure liquid argon connecting pipe. The pure liquid argon and the cooled dried nitrogen gas... Dry nitrogen gas is exchanged for heat in the nitrogen reboiler to obtain pure argon gas and liquid nitrogen. The two ends of the pure argon gas connecting pipe are respectively connected to the lower end of the argon purification column and the upper end of the nitrogen reboiler. The argon purification column is connected to the nitrogen reboiler through the pure argon gas connecting pipe. The pure argon gas obtained by heat exchange in the nitrogen reboiler is introduced into the argon purification column through the pure argon gas connecting pipe. It works together with the pure argon gas obtained by heat exchange and vaporization of the dried crude argon gas after cooling in the argon column reboiler to perform distillation on the depressurized crude liquid argon.

[0017] A temperature sensing element is installed in the portion of the feed pipe located between the main heat exchanger and the argon tower reboiler. The temperature sensing element is used to detect the temperature of the cooled, dried crude argon gas flowing through the portion of the feed pipe located between the main heat exchanger and the argon tower reboiler and directed to the argon tower reboiler.

[0018] According to one embodiment of this application, the argon extraction unit further includes an argon tower condenser / evaporator, which is installed at the top of the refined argon tower. The refined argon tube assembly includes a second inlet pipe, and the first valve assembly includes a pure liquid argon throttling valve. The two ends of the second inlet pipe are respectively connected to the lower end of the refined argon tower and the upper end of the argon tower condenser / evaporator. The pure liquid argon throttling valve is installed on the second inlet pipe. A portion of the pure liquid argon in the refined argon tower flows through the second inlet pipe and through the pure liquid argon throttling valve to be depressurized and then introduced into the argon tower condenser / evaporator. The refined argon tube... The assembly includes a third inlet pipe, the two ends of which are connected to the high end of the refined argon column and the high end of the argon column condenser-evaporator, respectively. The refined argon column is connected to the argon column condenser-evaporator through the third inlet pipe to supply argon-nitrogen mixed gas from the refined argon column to the argon column condenser-evaporator. The refined argon pipe assembly also includes a supplementary pipe, one end of which is connected to the argon column condenser-evaporator to supply external liquid argon to the argon column condenser-evaporator. The pure liquid argon and the external liquid argon as a whole exchange heat with the argon-nitrogen mixed gas introduced through the third inlet pipe to obtain pure argon gas, argon-nitrogen mixed liquid, and waste argon gas.

[0019] According to one embodiment of this application, the conduit assembly includes a pure argon gas pipeline and a waste argon gas pipeline. The waste argon gas pipeline includes a waste argon gas main pipe. One end of the pure argon gas pipeline and one end of the waste argon gas main pipe are both connected to the argon tower condenser-evaporator. The pure argon gas obtained by heat exchange in the argon tower condenser-evaporator is discharged through the pure argon gas pipeline, and the waste argon gas obtained by heat exchange in the argon tower condenser-evaporator is discharged through the waste argon gas main pipe. The main heat exchanger is installed on the pure argon gas pipeline and the waste argon gas main pipe. The pure argon gas flowing through the pure argon gas pipeline to be introduced into the main heat exchanger and the waste argon gas flowing through the waste argon gas main pipe to be introduced into the main heat exchanger serve as cold sources to exchange heat with the dry crude argon gas flowing through the feed pipe to be introduced into the main heat exchanger.

[0020] According to one embodiment of this application, the refined argon tube assembly further includes a reflux pipe, the two ends of which are respectively connected to the lower end of the argon tower condenser and the upper end of the refined argon tower. The argon tower condenser is connected to the refined argon tower through the reflux pipe so that the argon tower condenser can supply argon-nitrogen mixture to the refined argon tower.

[0021] According to one embodiment of this application, the stable distillation argon recovery equipment includes a raw material pre-removal system. The raw material pre-removal system includes a heat transfer component, which includes a heat transfer assembly and a phase-connection pipe assembly. The heat transfer assembly includes a heating assembly, and the phase-connection pipe assembly includes a first phase-connection pipe. The heating assembly is installed on the first phase-connection pipe. After compression and removal of oil and dust, crude argon gas is introduced into the heating assembly through the first phase-connection pipe. The heating assembly is used to heat the crude argon gas. The raw material pre-removal system includes a catalytic reactor assembly connected to one end of the first phase-connection pipe. Heated crude argon gas obtained by the heating assembly is introduced into the catalytic reactor assembly through the first phase-connection pipe. The catalytic reactor assembly is used to remove carbon monoxide and oxygen from the heated crude argon gas to obtain crude argon gas containing carbon dioxide. The raw material pre-removal system includes... The system includes an argon precooling and purification system. The phase connector assembly also includes a second phase connector, with its two ends connected to the catalytic reactor assembly and the argon precooling and purification system, respectively. The catalytic reactor assembly is connected to the argon precooling and purification system via the second phase connector. The heat transfer assembly also includes a water cooler, which is installed on the second phase connector. The crude argon gas containing carbon dioxide obtained from the catalytic reactor assembly is cooled by the water cooler and then directed to the argon precooling and purification system. The argon precooling and purification system is used to remove water and carbon dioxide from the crude argon gas containing carbon dioxide to obtain dry crude argon gas. The argon precooling and purification system is connected to the other end of the feed pipe. The dry crude argon gas obtained from the argon precooling and purification system is introduced into the main heat exchanger through the feed pipe.

[0022] According to one embodiment of this application, the first phase connector includes an inlet pipe and a first outlet pipe. The heating group includes a regenerator and an electric heater. The regenerator is connected to one end of the inlet pipe to introduce crude argon gas into the regenerator through the inlet pipe. The regenerator is used to preheat the introduced crude argon gas. The electric heater is connected to the regenerator through a pipeline to introduce the preheated crude argon gas into the electric heater through the regenerator. The electric heater is used to reheat the preheated crude argon gas. The two ends of the first outlet pipe are respectively connected to the electric heater and the catalytic reactor group. The electric heater is connected to the catalytic reactor group through the first outlet pipe to introduce heated crude argon gas into the catalytic reactor group through the electric heater. The inlet pipe includes a feed pipe and an oxygen supply pipe. One end of the feed pipe is connected to the regenerator. Crude argon gas is introduced into the regenerator through the feed pipe. The oxygen supply pipe is connected radially to the feed pipe and is used to introduce air or oxygen into the feed pipe.

[0023] According to one embodiment of this application, the second phase connector includes a heat recovery pipe and a second discharge pipe. The two ends of the heat recovery pipe are respectively connected to the catalytic reactor group and the regenerator. The catalytic reactor group is connected to the regenerator through the heat recovery pipe to introduce crude argon gas containing carbon dioxide into the regenerator as a heat source for heating the crude argon gas introduced into the regenerator. The two ends of the second discharge pipe are respectively connected to the regenerator and the argon gas precooling and purification system. The regenerator is connected to the argon gas precooling and purification system through the second discharge pipe. A water cooler is installed on the second discharge pipe. The crude argon gas containing carbon dioxide discharged from the regenerator flows into the water cooler through the second discharge pipe and is cooled by the water cooler before being introduced into the argon gas precooling and purification system.

[0024] According to one embodiment of this application, the refined argon tube assembly further includes a liquid nitrogen connecting pipe, and the stabilization component further includes a nitrogen condenser-evaporator. The two ends of the liquid nitrogen connecting pipe are respectively connected to the high end of the nitrogen condenser-evaporator and the low end of the nitrogen reboiler. The nitrogen reboiler is connected to the nitrogen condenser-evaporator via the liquid nitrogen connecting pipe. The first valve assembly further includes a liquid nitrogen throttling valve, which is installed on the liquid nitrogen connecting pipe. Liquid nitrogen obtained from heat exchange in the nitrogen reboiler enters the liquid nitrogen connecting pipe and flows through the liquid nitrogen throttling valve. After being depressurized by the liquid nitrogen throttling valve, it is introduced into the nitrogen condenser-evaporator. The waste argon gas pipeline further includes a waste argon gas branch pipe. One end of the waste argon gas branch pipe is connected to the portion of the waste argon gas main pipe located between the main heat exchanger and the argon tower condenser-evaporator. Waste argon gas introduced from the argon tower condenser-evaporator into the waste argon gas main pipe... The gas portion is introduced into the nitrogen condenser-evaporator through the sludge argon branch pipe. The sludge argon and liquid nitrogen exchange heat in the nitrogen condenser-evaporator to obtain nitrogen and sludge liquid argon. The nitrogen pipe group also includes a second nitrogen conduit. The two ends of the second nitrogen conduit are respectively connected to the high end of the nitrogen condenser-evaporator and the nitrogen compressor. The main heat exchanger is installed on the second nitrogen conduit. The nitrogen obtained by heat exchange in the nitrogen condenser-evaporator is introduced into the main heat exchanger through the second nitrogen conduit to exchange heat with the dry crude argon introduced into the main heat exchanger by the argon pre-cooling and purification system and the dry nitrogen introduced into the main heat exchanger by the nitrogen compressor, thereby raising its temperature. After being heated by heat exchange in the main heat exchanger, the nitrogen is introduced into the nitrogen compressor through the portion of the second nitrogen conduit located between the main heat exchanger and the nitrogen compressor.

[0025] According to one embodiment of this application, the refined argon tube assembly further includes a sludge argon connecting pipe. The two ends of the sludge argon connecting pipe are respectively connected to the lower end of the nitrogen condenser evaporator and the upper end of the refined argon tower. The nitrogen condenser evaporator is connected to the refined argon tower through the sludge argon connecting pipe, and the sludge argon obtained by heat exchange in the nitrogen condenser evaporator is introduced into the refined argon tower through the sludge argon connecting pipe.

[0026] To address the aforementioned technical problems and achieve at least one advantage of this application, this application provides a method for operating an argon recovery device capable of stable distillation, the method comprising the following steps:

[0027] Dry crude argon gas is introduced into the main heat exchanger through the feed pipe to exchange heat and obtain cooled dry crude argon gas. The cooled dry crude argon gas is introduced into the argon refining column to liquefy in the argon column reboiler to obtain crude liquid argon. The crude liquid argon enters the first inlet pipe from the argon column reboiler and flows through the crude liquid argon throttle valve. After being depressurized by the crude liquid argon throttle valve, it is introduced into the argon refining column. After being depressurized, the crude liquid argon is distilled in the argon refining column to obtain pure liquid argon placed at the bottom of the column and argon-nitrogen mixed gas rising to the top of the column. The pure liquid argon serves as a cold source for liquefying the cooled dry crude argon gas in the argon column reboiler. The pure liquid argon exchanges heat with the cooled dry crude argon gas to partially vaporize and become part of the argon-nitrogen mixed gas. The pure argon gas rising in the argon refining column and the depressurized crude liquid argon flowing downward in the argon refining column undergo gas-liquid phase contact for mass and heat transfer.

[0028] The temperature sensor detects the temperature of the cooled, dried crude argon gas flowing through the feed pipe between the main heat exchanger and the argon tower reboiler and directed to the argon tower reboiler. Based on the detected temperature of the cooled, dried crude argon gas, the operating speed of the nitrogen compressor is adjusted to regulate the flow rate of the dried nitrogen gas directed to the main heat exchanger. The nitrogen compressor introduces dried nitrogen gas into the main heat exchanger through the first nitrogen conduit to exchange heat within the main heat exchanger, thus obtaining cooled, dried nitrogen gas. Dry nitrogen gas is introduced into the nitrogen reboiler through the portion of the first nitrogen gas inlet pipe located between the nitrogen reboiler and the main heat exchanger. A portion of pure liquid argon in the argon refining column is introduced into the nitrogen reboiler through the pure liquid argon connecting pipe. The pure liquid argon and the cooled dry nitrogen gas exchange heat in the nitrogen reboiler to obtain pure argon gas and liquid nitrogen. The pure argon gas is introduced into the argon refining column through the pure argon gas connecting pipe, and works in conjunction with the pure argon gas obtained by exchanging heat with the cooled dried crude argon gas in the argon column reboiler to ensure the stable operation of the distillation process.

[0029] The beneficial effects of this application include:

[0030] 1. By utilizing the combined action of the argon refining column, the argon column reboiler, and the stabilization component, based on the amount of pure liquid argon obtained from distillation in the argon refining column and the pure argon gas vaporized by heat exchange with the dried crude argon gas after cooling in the argon column reboiler, the supply of dried nitrogen gas is adaptively adjusted by the stabilization component to adjust the amount of pure argon gas supplied from the nitrogen reboiler to the argon refining column, so as to match the actual operating conditions of the argon column reboiler, improve the anti-interference capability of the argon extraction unit, keep the evaporation rate of crude liquid argon during distillation after depressurization constant, ensure the stability of the distillation process, and thus ensure the purity of the obtained pure argon gas.

[0031] 2. By supplementing the crude argon with air or oxygen, the ratio of carbon monoxide to oxygen is maintained at 2:1, ensuring that carbon monoxide is fully removed during subsequent treatment in the catalytic reactor. Compared with existing technologies, hydrogen is not required during deoxygenation, simplifying the argon extraction process, improving equipment safety, and reducing processing costs.

[0032] 3. By cooling and subcooling the external liquid argon, sufficient cooling capacity is provided for the heat exchange operation in the argon tower condenser-evaporator. Compared with uncooled liquid argon, the argon extraction rate is guaranteed while the replenishment amount can be kept as low as possible, reducing the use of liquid argon. Attached Figure Description

[0033] Figure 1 shows a structural flow diagram of the argon recovery equipment capable of stable distillation described in this application.

[0034] Figure 2 shows a structural flow diagram of the raw material pre-removal system of the argon recovery equipment capable of stable distillation described in this application.

[0035] Figure 3 shows a partial structural flow diagram of the argon recovery equipment capable of stable distillation described in this application.

[0036] Figure 4 shows another partial structural flow diagram of the argon recovery device capable of stable distillation described in this application.

[0037] Figure 5 shows another partial structural flow diagram of the argon recovery device capable of stable distillation described in this application.

[0038] Reference numerals: 10. Raw material pre-removal system; 11. Heat transfer component; 111. Heat transfer assembly; 1111. Heating group; 11111. Regenerator; 11112. Electric heater; 1112. Water cooler; 112. Phase connection pipe group; 1121. First phase connection pipe; 11211. Inlet pipe; 112111. Feed pipe; 112112. Oxygen supply pipe; 11212. First discharge pipe; 1122. Second phase connection pipe; 11221. Heat recovery pipe; 11222. Second discharge pipe; 12. Catalytic reactor group; 13. Argon pre-cooling and purification system; 14. First compressor; 20. Distillation system; 21. Temperature control mechanism; 211. Temperature control component; 2111. Main heat exchanger; 2112. Temperature control assembly; 21121. Auxiliary heat exchanger; 21122. Expander; 2113. Subcooler assembly; 21131. First subcooler; 21132. Second subcooler; 212. Conductor assembly; 2121. Feed pipe; 2122. Pure argon gas pipeline; 2123. Waste argon gas pipeline; 21231. Waste argon gas main pipe; 21232. Waste argon gas branch pipe; 2124. Nitrogen pipeline assembly; 21241, First nitrogen gas inlet pipe; 21242, Second nitrogen gas inlet pipe; 2125, Dry air pipeline; 21251, Dry air inlet pipe; 21252, Dry air outlet pipe; 212521, Branch pipe; 212522, Main pipe; 2126, Oxygen-enriched air pipeline; 21261, Oxygen-enriched air main pipe; 21262, Liquid nitrogen pipe body; 2127, Nitrogen pipeline; 22, Argon extraction unit; 221, Refined argon tower; 222, Argon tower reboiler; 223, Refined argon tube assembly; 2231 2231. First drain pipe; 2232. Second drain pipe; 2233. Third drain pipe; 2234. Supplement pipe; 2235. Return pipe; 2236. Pure liquid argon connection pipe; 2237. Pure argon gas connection pipe; 2238. Liquid nitrogen connection pipe; 2239. Waste liquid argon connection pipe; 224. First valve group; 2241. Crude liquid argon throttle valve; 2242. Pure liquid argon throttle valve; 2243. External liquid argon control valve; 2244. Liquid nitrogen throttle valve; 225. Argon tower condenser / evaporator; 226. Stabilizing component; 2261, Stabilization Components; 22611, Nitrogen Compressor; 22612, Nitrogen Reboiler; 22613, Nitrogen Condenser / Evaporator; 2262, Temperature Detector; 23, Auxiliary Unit; 231, Refining Nitrogen Tower; 232, Auxiliary Piping; 2321, First Flow Guide Piping; 2322, Second Flow Guide Piping; 2323, Third Flow Guide Piping; 233, Nitrogen Tower Condenser / Evaporator; 234, Second Valve Group; 2341, Oxygen-Enriched Liquid Throttling Valve; 2342, Dry Air Throttling Valve; 2343, Liquid Nitrogen Control Valve; 30, Air Pretreatment System; 31, Air Purification Unit; 32, Second Compressor. Detailed Implementation

[0039] The following description is intended to disclose this application and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of this application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of this application.

[0040] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0041] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0042] Referring to Figures 1 and 2, a preferred embodiment of the argon recovery device capable of stable distillation according to this application will be described in detail below. The stable distillation device is used to recover crude argon gas, wherein the gaseous components of the crude argon gas include oxygen, nitrogen, carbon monoxide and argon, wherein the oxygen content is 0-1000 ppm, the nitrogen content is 0-0.4%, the carbon monoxide content is 0-2000 ppm, and the remainder is argon.

[0043] The stable distillation argon recovery equipment includes a raw material pre-purification system 10, which includes a heat transfer component 11. The heat transfer component 11 includes a heat transfer assembly 111 and a phase connector assembly 112. The heat transfer assembly 111 includes a heating assembly 1111, and the phase connector assembly 112 includes a first phase connector 1121. The heating assembly 1111 is installed on the first phase connector 1121. After compression and oil and dust removal, the crude argon gas is introduced into the heating assembly 1111 through the first phase connector 1121. The heating assembly 1111 is used to heat the crude argon gas.

[0044] The raw material pre-removal system 10 includes a catalytic reactor assembly 12, which is connected to one end of the first phase connector 1121. Heated crude argon gas, obtained by heating via the heating assembly 1111, is introduced into the catalytic reactor assembly 12 through the first phase connector 1121. The catalytic reactor assembly 12 is used to remove carbon monoxide and oxygen from the heated crude argon gas to obtain crude argon gas containing carbon dioxide.

[0045] Preferably, the catalytic reactor group 12 is implemented comprising at least three catalytic furnaces connected in series or in parallel, each of which is provided with a catalyst and a copper-based catalyst as a getter. The catalytic reaction of the catalyst is: 2CO + O2 = 2CO2; the getter acts to carry out the following reactions in turn: (1): 2X + O2 = 2XO; (2): XO + CO = X + CO2.

[0046] The first phase connector 1121 includes an inlet pipe 11211 and a first outlet pipe 11212. The heating assembly 1111 includes a regenerator 11111 and an electric heater 11112. The regenerator 11111 is connected to one end of the inlet pipe 11211 to introduce crude argon gas into the regenerator 11111 via the inlet pipe 11211. The regenerator 11111 is used to preheat the introduced crude argon gas. The electric heater 11112 is connected to the regenerator 11111 via a pipeline to introduce the preheated crude argon gas into the electric heater 11112 via the regenerator 11111. The electric heater 11112 is used to reheat the preheated crude argon gas. The two ends of the first discharge pipe 11212 are respectively connected to the electric heater 11112 and the catalytic reactor group 12. The electric heater 11112 is connected to the catalytic reactor group 12 through the first discharge pipe 11212 so that heated crude argon gas is introduced into the catalytic reactor group 12 by the electric heater 11112.

[0047] Preferably, the inlet pipe 11211 includes a feed pipe 112111 and an oxygen supply pipe 112112. One end of the feed pipe 112111 is connected to the regenerator 11111, and crude argon gas is introduced into the regenerator 11111 through the feed pipe 112111. The oxygen supply pipe 112112 is radially connected to the feed pipe 112111. The oxygen supply pipe 112112 is used to introduce air or oxygen into the feed pipe 112111. When the oxygen content in the crude argon gas is less than 1000 ppm, the ratio of carbon monoxide to oxygen is maintained at 2:1 by supplementing air or oxygen. This ensures that after the heated crude argon gas is processed by the catalytic reactor group 12, the carbon monoxide in it is fully removed. Compared with the prior art, hydrogen is not required during deoxygenation, simplifying the argon extraction process, improving equipment safety, and reducing processing costs.

[0048] The stable distillation argon recovery equipment further includes an argon precooling and purification system 13. The phase connector assembly 112 further includes a second phase connector 1122, the two ends of which are respectively connected to the catalytic reactor assembly 12 and the argon precooling and purification system 13. The catalytic reactor assembly 12 is connected to the argon precooling and purification system 13 through the second phase connector 1122. The heat transfer assembly 111 further includes a water cooler 1112, which is installed on the second phase connector 1122. The crude argon gas containing carbon dioxide obtained by the catalytic reactor assembly 12 is cooled by the water cooler 1112 and then directed to the argon precooling and purification system 13. The argon precooling and purification system 13 is used to remove water and carbon dioxide from the crude argon gas containing carbon dioxide to obtain dry crude argon gas.

[0049] Preferably, the argon precooling purification system 13 is filled with alumina and molecular sieves.

[0050] It is worth mentioning that the second phase connector 1122 includes a heat recovery pipe 11221 and a second discharge pipe 11222. The two ends of the heat recovery pipe 11221 are respectively connected to the catalytic reactor group 12 and the regenerator 11111. The catalytic reactor group 12 is connected to the regenerator 11111 through the heat recovery pipe 11221 to introduce crude argon gas containing carbon dioxide into the regenerator 11111 as a heat source for heating the crude argon gas introduced into the regenerator 11111. The two ends of the second discharge pipe 11222 are respectively connected to the regenerator 11111 and the argon gas precooling and purification system 13. The regenerator 11111 is connected to the argon gas precooling and purification system 13 through the second discharge pipe 11222. The water cooler 1112 is installed on the second discharge pipe 11222. The crude argon gas containing carbon dioxide discharged from the regenerator 11111 flows into the water cooler 1112 through the second discharge pipe 11222 and is cooled by the water cooler 1112 before being introduced into the argon precooling and purification system 13.

[0051] The raw material pre-removal system 10 also includes a first compressor 14, which is installed on the feed pipe 112111. The first compressor 14 is connected to the regenerator 11111 through the feed pipe 112111. After oil and dust removal, the crude argon gas is compressed by the first compressor 14 and introduced into the regenerator 11111 through the feed pipe 112111.

[0052] Preferably, the temperature of the crude argon gas guided to the first compressor 14 by the feed pipe 112111 is 25-30°C, and the temperature of the crude argon gas after compression by the first compressor 14 is 35-40°C. The temperature of the heated crude argon gas obtained by heating by the regenerator 11111 is 170-180°C, and the temperature of the heated crude argon gas after secondary heating by the electric heater 11112 is 200-220°C. The crude argon gas containing carbon dioxide obtained by treatment by the catalytic reactor group 12 has a carbon monoxide and oxygen content of no more than 1 ppm, and the temperature of the crude argon gas containing carbon dioxide is 200-250°C. The temperature of the crude argon gas containing carbon dioxide after heat recovery in the regenerator 11111 is 75-80°C, and the temperature of the cooled crude argon gas containing carbon dioxide obtained by treatment by the water cooler 1112 is 35-40°C. The temperature of the dry crude argon obtained by the argon precooling and purification system 13 is 15-25°C, and the nitrogen content in the dry crude argon is 0.4%.

[0053] Referring to Figures 1, 3, and 4, the stable distillation argon recovery equipment further includes a distillation system 20. The distillation system 20 includes a temperature control mechanism 21, which includes a temperature control component 211 and a conduit assembly 212. The temperature control component 211 includes a main heat exchanger 2111, and the conduit assembly 212 includes a feed pipe 2121. The main heat exchanger 2111 is installed on the feed pipe 2121. The argon precooling and purification system 13 is connected to one end of the feed pipe 2121. The dry crude argon obtained by the argon precooling and purification system 13 is introduced into the main heat exchanger 2111 through the feed pipe 2121 and discharged after being cooled in the main heat exchanger 2111.

[0054] The distillation system 20 includes an argon extraction unit 22, which comprises an argon purification column 221 and an argon column reboiler 222. The argon column reboiler 222 is installed inside the argon purification column 221 and located at the bottom of the column. The argon column reboiler 222 is connected to the other end of the feed pipe 2121. The cooled and dried crude argon gas obtained by heat exchange in the main heat exchanger 2111 is introduced into the argon column reboiler 222 through the portion of the feed pipe 2121 located between the main heat exchanger 2111 and the argon column reboiler 222. The cooled and dried crude argon gas is liquefied in the argon column reboiler 222 to obtain crude liquid argon.

[0055] The argon extraction unit 22 includes a refined argon tube assembly 223 and a first valve assembly 224. The refined argon tube assembly 223 includes a first inlet pipe 2231, and the first valve assembly 224 includes a crude liquid argon throttling valve 2241. The two ends of the first inlet pipe 2231 are respectively connected to the lower end of the argon tower reboiler 222 and the upper end of the refined argon tower 221. The crude liquid argon throttling valve 2241 is installed on the first inlet pipe 2231. Crude liquid argon enters the first inlet pipe 2231 from the argon tower reboiler 222 and flows through the crude liquid argon throttling valve 2241. After being depressurized by the crude liquid argon throttling valve 2241, it is introduced into the refined argon tower 221.

[0056] Due to the pressure difference, the boiling point temperature changes with the pressure. This creates a temperature difference between the depressurized crude argon obtained by the crude liquid argon throttling valve 2241 and the cooled, dried crude argon gas in the argon tower reboiler 222, ensuring normal heat exchange. The depressurized crude argon is introduced into the refined argon tower 221 for distillation to obtain pure liquid argon at the bottom and an argon-nitrogen mixture rising to the top. The pure liquid argon serves as a cold source for liquefying the cooled, dried crude argon gas in the argon tower reboiler 222. The pure liquid argon exchanges heat with the cooled, dried crude argon gas, causing partial vaporization to become part of the argon-nitrogen mixture. The rising pure argon gas in the refined argon tower 221 comes into gas-liquid contact with the downward-flowing depressurized crude argon in the refined argon tower 221 for mass and heat transfer.

[0057] The argon extraction unit 22 further includes an argon tower condenser-evaporator 225, which is installed at the top of the refined argon tower 221. The refined argon tube assembly 223 includes a second inlet pipe 2232, with its two ends connected to the lower end of the refined argon tower 221 and the upper end of the argon tower condenser-evaporator 225, respectively. The first valve assembly 224 includes a pure liquid argon throttling valve 2242, which is installed on the second inlet pipe 2232. A portion of the pure liquid argon in the refined argon tower 221 flows through the second inlet pipe 2232 and through the pure liquid argon throttling valve 2242, where it is depressurized and then introduced into the argon tower condenser-evaporator 225.

[0058] The refined argon tube assembly 223 includes a third inlet pipe 2233. The two ends of the third inlet pipe 2233 are respectively connected to the high end of the refined argon tower 221 and the high end of the argon tower condenser evaporator 225. The refined argon tower 221 is connected to the argon tower condenser evaporator 225 through the third inlet pipe 2233, so that the refined argon tower 221 supplies argon-nitrogen mixed gas to the argon tower condenser evaporator 225.

[0059] The refined argon tube assembly 223 further includes a replenishment pipe 2234 and a return pipe 2235. One end of the replenishment pipe 2234 is connected to the argon tower condenser-evaporator 225 to provide external liquid argon to the argon tower condenser-evaporator 225. The pure liquid argon and the external liquid argon are heat-exchanged with the argon-nitrogen mixture introduced through the third inlet pipe 2233 to obtain pure argon gas, argon-nitrogen mixture, and waste argon gas. The two ends of the return pipe 2235 are respectively connected to the lower end of the argon tower condenser-evaporator 225 and the upper end of the refined argon tower 221. The argon tower condenser-evaporator 225 is connected to the refined argon tower 221 through the return pipe 2235, so that the argon tower condenser-evaporator 225 supplies the refined argon tower 221 with the argon-nitrogen mixture. The argon-nitrogen mixture flows downward in the refined argon tower 221 and simultaneously undergoes heat and mass transfer with the rising argon-nitrogen mixture in the refined argon tower 221 to recover as much argon as possible.

[0060] It is worth mentioning that the external liquid argon introduced through the replenishment pipe 2234 is introduced into the argon tower condenser-evaporator 225 after being cooled, thereby providing sufficient cooling for the heat exchange operation in the argon tower condenser-evaporator 225. Compared with uncooled liquid argon, the replenishment amount can be kept as low as possible while ensuring the argon extraction rate, thus reducing the use of liquid argon.

[0061] Preferably, the temperature of the external liquid argon introduced into the argon tower condenser evaporator 225 is -182 to -184°C, which reduces the liquid argon consumption by 20% compared to non-cooled liquid argon, based on the same argon extraction rate.

[0062] Preferably, the first valve group 224 further includes an external liquid argon control valve 2243, which is installed on the replenishment pipe 2234. The external liquid argon control valve 2243 is used to adjust the flow rate of external liquid argon directed to the argon tower condenser-evaporator 225, so that the external liquid argon replenished to the argon tower condenser-evaporator 225 meets the required cooling capacity without being wasted.

[0063] The conduit assembly 212 includes a pure argon gas pipeline 2122 and a waste argon gas pipeline 2123. The waste argon gas pipeline 2123 includes a waste argon gas main pipe 21231. One end of the pure argon gas pipeline 2122 and one end of the waste argon gas main pipe 21231 are both connected to the argon tower condenser-evaporator 225. The pure argon gas obtained through heat exchange in the argon tower condenser-evaporator 225 is discharged through the pure argon gas pipeline 2122 for user use. The waste argon gas obtained through heat exchange in the argon tower condenser-evaporator 225 is discharged through the waste argon gas main pipe 21231 for venting.

[0064] Preferably, the main heat exchanger 2111 is installed on the pure argon gas pipeline 2122 and the waste argon gas main pipe 21231. The pure argon gas flowing through the pure argon gas pipeline 2122 to be introduced into the main heat exchanger 2111 and the waste argon gas flowing through the waste argon gas main pipe 21231 to be introduced into the main heat exchanger 2111 serve as cold sources to exchange heat with the dry crude argon gas flowing through the feed pipe 2121 to be introduced into the main heat exchanger 2111.

[0065] It is worth mentioning that the argon extraction unit 22 also includes a stabilization component 226, which includes a stabilization assembly 2261. The stabilization assembly 2261 includes a nitrogen compressor 22611. The conduit group 212 includes a nitrogen pipe group 2124, which includes a first nitrogen conduit 21241. One end of the first nitrogen conduit 21241 is connected to the nitrogen compressor 22611. The main heat exchanger 2111 is installed on the first nitrogen conduit 21241. The nitrogen compressor 22611 introduces dry nitrogen into the first nitrogen conduit 21241. The dry nitrogen is introduced into the main heat exchanger 2111 through the first nitrogen conduit 21241 to exchange heat with the pure argon and waste argon introduced into the main heat exchanger 2111 and thus cool down.

[0066] The stabilization component 2261 further includes a nitrogen reboiler 22612, which is installed at the other end of the first nitrogen gas inlet pipe 21241. Cooled, dried nitrogen gas obtained through heat exchange in the main heat exchanger 2111 is introduced into the nitrogen reboiler 22612 through the portion of the first nitrogen gas inlet pipe 21241 located between the nitrogen reboiler 22612 and the main heat exchanger 2111. The refined argon tube assembly 223 further includes a pure liquid argon connecting pipe 2236, whose two ends are respectively connected to the nitrogen reboiler 22612 and the lower end of the refined argon tower 221. A portion of the pure liquid argon in the refined argon tower 221 is introduced into the nitrogen reboiler 22612 through the pure liquid argon connecting pipe 2236. Pure liquid argon and cooled, dried nitrogen gas exchange heat within the nitrogen reboiler 22612 to obtain pure argon gas and liquid nitrogen.

[0067] The refined argon tube assembly 223 also includes a pure argon gas connecting pipe 2237. The two ends of the pure argon gas connecting pipe 2237 are respectively connected to the lower end of the refined argon column 221 and the upper end of the nitrogen reboiler 22612. The refined argon column 221 is connected to the nitrogen reboiler 22612 via the pure argon gas connecting pipe 2237. The pure argon gas obtained through heat exchange in the nitrogen reboiler 22612 is introduced into the refined argon column 221 through the pure argon gas connecting pipe 2237, where it works in conjunction with the pure argon gas obtained by heat exchange and vaporization of the cooled and dried crude argon gas in the argon column reboiler 222 to distill the depressurized crude liquid argon.

[0068] The stabilizing component 226 includes a temperature sensing element 2262, which is installed in the portion of the feed pipe 2121 located between the main heat exchanger 2111 and the argon tower reboiler 222. The temperature sensing element 2262 is used to detect the temperature of the cooled, dried crude argon gas flowing through the portion of the feed pipe 2121 between the main heat exchanger 2111 and the argon tower reboiler 222 and directed to the argon tower reboiler 222. The nitrogen compressor 22611 is capable of variable speed operation to adjust the flow rate of the dried nitrogen gas directed to the main heat exchanger 2111.

[0069] Specifically, when the temperature detection element 2262 detects that the temperature of the cooled dry crude argon gas remains outside the predetermined temperature range, the flow rate of the dried nitrogen gas directed to the main heat exchanger 2111 is adjusted by the nitrogen compressor 22611. That is, when the temperature of the cooled dry crude argon gas is too low, the amount of cooling required for liquefaction in the argon tower reboiler 222 is reduced, which reduces the evaporation rate during the distillation of the depressurized crude liquid argon. At this time, the operating speed of the nitrogen compressor 22611 is increased to increase the flow rate of the dried nitrogen gas directed to the main heat exchanger 2111, thereby increasing the flow rate of the cooled dry nitrogen gas introduced into the nitrogen reboiler 22612. The increased volume leads to an increase in the amount of pure argon gas obtained through heat exchange in the nitrogen reboiler 22612, providing more pure argon gas to the argon refining column 221, thereby ensuring that the gas-liquid two-phase equilibrium is achieved in the argon refining column 221. When the temperature of the dried crude argon gas is too high after cooling, the amount of cooling required for liquefaction of the dried crude argon gas in the argon column reboiler 222 increases, which results in a greater evaporation rate during the distillation of the crude liquid argon after depressurization. At this time, the operating speed of the nitrogen compressor 22611 is reduced to decrease the flow rate of the dried nitrogen gas directed to the main heat exchanger 2111, thereby reducing the amount of pure argon gas supplied to the argon refining column 221, so as to achieve better distillation effect while saving energy.

[0070] In this way, by utilizing the combined action of the argon refining column 221, the argon column reboiler 222, and the stabilizing component 226, the amount of pure liquid argon obtained from the distillation in the argon refining column 221 and the amount of pure argon gas vaporized by heat exchange with the cooled and dried crude argon gas in the argon column reboiler 222 are adjusted. This, combined with the adaptive adjustment of the supply of dried nitrogen gas by the stabilizing component 226 to adjust the amount of pure argon gas supplied to the argon refining column 221 by the nitrogen reboiler 22612, is matched with the actual operating conditions of the argon column reboiler 222. This improves the anti-interference capability of the argon extraction unit 22, ensuring that the evaporation rate during the distillation of the crude liquid argon after depressurization remains constant, guaranteeing the stability of the distillation process, and thus ensuring the purity of the obtained pure argon gas. Compared with the prior art, this effectively prevents fluctuations in the composition of the cooled dried crude argon gas or deviations in the heat exchange temperature of the main heat exchanger 2111, which could cause fluctuations in the heat load of the argon column reboiler 222 and affect the distillation effect.

[0071] Preferably, the temperature sensing element 2262 is implemented as a thermometer.

[0072] The argon tube assembly 223 further includes a liquid nitrogen connecting pipe 2238, and the stabilization component 2261 further includes a nitrogen condenser-evaporator 22613. The two ends of the liquid nitrogen connecting pipe 2238 are respectively connected to the high end of the nitrogen condenser-evaporator 22613 and the low end of the nitrogen reboiler 22612. The nitrogen reboiler 22612 is connected to the nitrogen condenser-evaporator 22613 through the liquid nitrogen connecting pipe 2238. The first valve assembly 224 further includes a liquid nitrogen throttling valve 2244, which is installed on the liquid nitrogen connecting pipe 2238. The liquid nitrogen obtained from heat exchange in the nitrogen reboiler 22612 enters the liquid nitrogen connecting pipe 2238 and flows through the liquid nitrogen throttling valve 2244. After being depressurized by the liquid nitrogen throttling valve 2244, it is introduced into the nitrogen condenser-evaporator 22613.

[0073] The waste argon gas pipeline 2123 further includes a waste argon gas branch pipe 21232. One end of the waste argon gas branch pipe 21232 is connected to the portion of the waste argon gas main pipe 21231 located between the main heat exchanger 2111 and the argon tower condenser-evaporator 225. The waste argon gas portion introduced into the waste argon gas main pipe 21231 from the argon tower condenser-evaporator 225 is introduced into the nitrogen condenser-evaporator 22613 through the waste argon gas branch pipe 21232. The waste argon gas and liquid nitrogen exchange heat in the nitrogen condenser-evaporator 22613 to obtain nitrogen gas and waste liquid argon. The nitrogen pipeline group 2124 further includes a second nitrogen gas conduction pipe 21242. The two ends of the second nitrogen gas conduction pipe 21242 are respectively connected to the high end of the nitrogen condenser-evaporator 22613 and the nitrogen compressor 22611, and the main heat exchanger 2111 is installed on the second nitrogen gas conduction pipe 21242. The nitrogen obtained through heat exchange in the nitrogen condenser-evaporator 22613 is introduced into the main heat exchanger 2111 through the second nitrogen conduit 21242 to exchange heat with the dry crude argon introduced into the main heat exchanger 2111 by the argon pre-cooling and purification system 13 and the dry nitrogen introduced into the main heat exchanger 2111 by the nitrogen compressor 22611, thereby increasing its temperature. After the nitrogen is heated by heat exchange in the main heat exchanger 2111, it is introduced into the nitrogen compressor 22611 through the portion of the second nitrogen conduit 21242 located between the main heat exchanger 2111 and the nitrogen compressor 22611, thereby realizing nitrogen recycling and saving nitrogen source.

[0074] The refined argon tube assembly 223 also includes a waste argon connection pipe 2239. The two ends of the waste argon connection pipe 2239 are respectively connected to the lower end of the nitrogen condenser evaporator 22613 and the upper end of the refined argon tower 221. The nitrogen condenser evaporator 22613 is connected to the refined argon tower 221 through the waste argon connection pipe 2239. The waste argon obtained from heat exchange within the nitrogen condenser evaporator 22613 is introduced into the refined argon tower 221 through the waste argon connection pipe 2239. While flowing downwards within the refined argon tower 221, the waste argon undergoes heat and mass transfer with the rising argon-nitrogen mixture within the refined argon tower 221 to recover as much argon as possible.

[0075] Preferably, the temperature of the dried crude argon gas, after being cooled by the main heat exchanger 2111 and directed to the argon tower reboiler 222, is -155 to -160°C. The temperature of the crude liquid argon discharged from the argon tower reboiler 222 is -158 to -160°C, and the temperature of the crude liquid argon after being depressurized by the crude liquid argon throttle valve 2241 is -161 to -163°C. The nitrogen content of the pure liquid argon discharged from the refined argon tower 221 is no more than 4 ppm, the temperature of the pure liquid argon is -161 to -163°C, and the temperature of the pure liquid argon after being depressurized by the pure liquid argon throttle valve 2242 is -163 to -165°C. The temperature of the argon-nitrogen mixture directed to the argon tower condenser-evaporator 225 is -162 to -164°C. The temperature of the waste argon gas discharged from the argon tower condenser-evaporator 225 is -162 to -164°C. The temperature of the argon-nitrogen liquid discharged from the argon tower condenser-evaporator 225 is -162 to -164°C. The temperature of the pure argon gas discharged from the argon tower condenser-evaporator 225 is -163 to -165°C. The temperatures of both pure argon gas and waste argon gas after heat exchange in the main heat exchanger 2111 are 10 to 20°C. The temperature of the external liquid argon introduced into the argon tower condenser-evaporator 225 is -182 to -184°C. The dry nitrogen discharged from the nitrogen compressor 22611 and guided to the main heat exchanger 2111 through the first nitrogen pipe 21241, and the nitrogen gas heated by heat exchange in the main heat exchanger 2111 and guided to the nitrogen compressor 22611 through the second nitrogen pipe 21242, both have a temperature of 10-20°C. The temperature of the cooled, dried nitrogen gas, which is cooled by heat exchange in the main heat exchanger 2111 and then directed to the nitrogen reboiler 22612, is -153 to -158°C. The temperature of the pure argon gas discharged from the nitrogen reboiler 22612 is -160°C. The temperature of the liquid nitrogen discharged from the nitrogen reboiler 22612 is -158 to -160°C. The temperature of the liquid nitrogen after being depressurized by the liquid nitrogen throttle valve 2244 is -174 to -178°C. The temperature of the nitrogen gas discharged from the nitrogen condenser evaporator 22613 is -162 to -164°C. The temperature of the sludge argon gas discharged from the nitrogen condenser evaporator 22613 is -161 to -163°C.

[0076] Referring to Figures 1 and 5, the stable distillation argon recovery equipment further includes an air pretreatment system 30, which includes an air purification device 31. Air is compressed and then introduced into the air purification device 31 to adsorb carbon dioxide and water to obtain dry air.

[0077] The air pretreatment system 30 also includes a second compressor 32, which is connected to the air purification device 31 via a pipeline. Air is compressed by the second compressor 32 and then introduced into the air purification device 31.

[0078] Preferably, the temperature of the air introduced into the second compressor 32 is 20-25°C, the temperature of the air after being compressed by the second compressor 32 is 35-40°C, and the temperature of the dry air obtained by the air purification device 31 is 15-25°C.

[0079] The conduit assembly 212 further includes a dry air conduit 2125. The air purification device 31 is installed at one end of the dry air conduit 2125. The main heat exchanger 2111 is installed on the dry air conduit 2125. The dry air discharged from the air purification device 31 is introduced into the main heat exchanger 2111 through the dry air conduit 2125 to exchange heat with the pure argon gas introduced into the main heat exchanger 2111 by the pure argon gas conduit 2122, the waste argon gas introduced into the main heat exchanger 2111 by the waste argon gas main pipe 21231, and the nitrogen gas introduced into the main heat exchanger 2111 by the second nitrogen conduit 21242, thereby cooling down.

[0080] Referring to Figures 1 and 5, the distillation system 20 further includes an auxiliary unit 23, which includes a nitrogen purification tower 231 connected to the other end of the dry air duct 2125. The temperature control component 211 includes a temperature control assembly 2112 installed in the portion of the dry air duct 2125 located between the main heat exchanger 2111 and the nitrogen purification tower 231. Cooled dry air discharged from the main heat exchanger 2111 flows through the dry air duct 2125 to the temperature control assembly 2112 for further cooling before being directed to the nitrogen purification tower 231. The further cooled dry air is then distilled within the nitrogen purification tower 231 to obtain an oxygen-enriched liquid and nitrogen.

[0081] The auxiliary unit 23 includes an auxiliary pipe 232 and a nitrogen tower condenser-evaporator 233. The auxiliary pipe 232 includes a first guide pipe 2321. The two ends of the first guide pipe 2321 are respectively connected to the high end of the nitrogen purification tower 231 and the high end of the nitrogen tower condenser-evaporator 233. The nitrogen purification tower 231 is connected to the nitrogen tower condenser-evaporator 233 through the first guide pipe 2321. The nitrogen rising in the nitrogen purification tower 231 is introduced into the nitrogen tower condenser-evaporator 233 through the first guide pipe 2321.

[0082] The temperature control component 211 includes a subcooler group 2113, the subcooler group 2113 includes a first subcooler 21131, the auxiliary pipe 232 includes a second flow guide pipe 2322, the two ends of the second flow guide pipe 2322 are respectively connected to the lower end of the nitrogen purification tower 231 and the upper end of the nitrogen tower condenser evaporator 233, the nitrogen purification tower 231 is connected to the nitrogen tower condenser evaporator 233 through the second flow guide pipe 2322, and the first subcooler 21131 is installed on the second flow guide pipe 2322. The auxiliary unit 23 further includes a second valve group 234, which includes an oxygen-enriched liquid throttling valve 2341. The oxygen-enriched liquid throttling valve 2341 is installed in the portion of the second guide pipe 2322 located between the first subcooler 21131 and the nitrogen tower condenser-evaporator 233. The oxygen-enriched liquid discharged from the lower end of the nitrogen tower 231 is introduced into the first subcooler 21131 through the second guide pipe 2322 and cooled within the first subcooler 21131 before flowing through the oxygen-enriched liquid throttling valve 2341 and into the nitrogen tower condenser-evaporator 233. The oxygen-enriched liquid throttling valve 2341 is used to depressurize the cooled oxygen-enriched liquid that has been heat-exchanged in the first subcooler 21131 and directed to the nitrogen tower condenser-evaporator 233. After depressurization, the oxygen-enriched liquid and nitrogen gas exchange heat within the nitrogen tower condenser-evaporator 233 to obtain oxygen-enriched gas and liquid nitrogen.

[0083] The auxiliary pipe 232 also includes a third guide pipe 2323, the two ends of which are connected to the lower end of the nitrogen tower condenser-evaporator 233 and the upper end of the nitrogen purification tower 231, respectively. The nitrogen tower condenser-evaporator 233 is connected to the nitrogen purification tower 231 through the third guide pipe 2323. Liquid nitrogen obtained by heat exchange of nitrogen gas in the nitrogen tower condenser-evaporator 233 flows to the nitrogen purification tower 231 through the third guide pipe 2323, so as to serve as the reflux liquid in the nitrogen purification tower 231. This liquid nitrogen then comes into gas-liquid contact with the cooled and dried air rising in the nitrogen purification tower 231 to transfer heat and mass, thereby enabling continuous distillation operation.

[0084] The conduit assembly 212 further includes an oxygen-enriched air pipe 2126, which includes an oxygen-enriched air main pipe 21261. One end of the oxygen-enriched air main pipe 21261 is connected to the high end of the nitrogen tower condenser-evaporator 233. The first subcooler 21131 is installed on the oxygen-enriched air main pipe 21261. The oxygen-enriched gas obtained by heat exchange in the nitrogen tower condenser-evaporator 233 is introduced into the first subcooler 21131 through the oxygen-enriched air main pipe 21261 to serve as a cold source for heat exchange with the oxygen-enriched liquid flowing through the first subcooler 21131.

[0085] The oxygen-enriched air duct 2126 also includes a liquid nitrogen pipe body 21262. The subcooler group 2113 includes a second subcooler 21132, which is installed on the supplementary duct 2234 and the liquid nitrogen pipe body 21262. One end of the liquid nitrogen pipe body 21262 is connected to the third guide duct 2323. The liquid nitrogen discharged from the nitrogen tower condenser evaporator 233 to the third guide duct 2323 flows through the liquid nitrogen pipe body 21262 and is introduced into the second subcooler 21132 as a cold source to exchange heat with the external liquid argon flowing through the second subcooler 21132. At this time, no additional cold source is required, which is energy-saving and environmentally friendly.

[0086] Preferably, one end of the liquid nitrogen pipe 21262 away from the third guide pipe 2323 is connected to the portion of the oxygen-enriched air main pipe 21261 located between the first subcooler 21131 and the nitrogen tower condenser-evaporator 233, so that the liquid nitrogen heated by heat exchange in the second subcooler 21132 flows into the oxygen-enriched air main pipe 21261 to mix with the oxygen-enriched oxygen discharged from the nitrogen tower condenser-evaporator 233 and is guided together to the first subcooler 21131. The liquid nitrogen and oxygen-enriched oxygen as a whole exchange heat with the oxygen-enriched liquid introduced into the first subcooler 21131 to obtain oxygen-enriched air.

[0087] It is worth mentioning that the air purification device 31 is connected to the other end of the oxygen-enriched air main pipe 21261. The oxygen-enriched air obtained by heat exchange through the first subcooler 21131 is introduced into the air purification device 31 through the part of the oxygen-enriched air main pipe 21261 located between the first subcooler 21131 and the air purification device 31, so as to serve as the regeneration gas of the air purification device 31, thereby realizing the reuse of resources without the need for additional regeneration gas, which is energy-saving and environmentally friendly.

[0088] The conduit assembly 212 also includes a nitrogen pipeline 2127. The first subcooler 21131 is installed on the nitrogen pipeline 2127. One end of the nitrogen pipeline 2127 is connected to the first guide pipe 2321. A portion of the nitrogen discharged from the nitrogen purification tower 231 to the first guide pipe 2321 flows through the nitrogen pipeline 2127 and is introduced into the first subcooler 21131 to serve as a cold source for heat exchange with the oxygen-enriched liquid introduced into the first subcooler 21131.

[0089] It is worth mentioning that the argon precooling and purification system 13 is connected to the other end of the nitrogen pipeline 2127. The nitrogen gas heated by heat exchange in the first subcooler 21131 is introduced into the argon precooling and purification system 13 through the part of the nitrogen pipeline 2127 located between the first subcooler 21131 and the argon precooling and purification system 13, so as to serve as the regeneration gas of the argon precooling and purification system 13, thereby realizing the reuse of resources without the need for additional regeneration gas, which is energy-saving and environmentally friendly.

[0090] Preferably, the main heat exchanger 2111 is installed in the portion of the oxygen-enriched air main pipe 21261 located between the air purification device 31 and the first subcooler 21131, and the main heat exchanger 2111 is installed in the portion of the nitrogen pipe 2127 located between the argon precooling purification system 13 and the first subcooler 21131. The oxygen-enriched air and nitrogen, heated by heat exchange with the first subcooler 21131, are respectively guided to the main heat exchanger 2111 through the portions of the oxygen-enriched air main pipe 21261 and the nitrogen pipe 2127 located between the first subcooler 21131 and the main heat exchanger 2111. The oxygen-enriched air and nitrogen flowing into the main heat exchanger 2111 serve as a cold source for heat exchange with the dry air introduced into the main heat exchanger 2111 by the dry air pipe 2125, the dry crude argon introduced into the main heat exchanger 2111 by the feed pipe 2121, and the dry nitrogen introduced into the main heat exchanger 2111 by the first nitrogen conduit 21241.

[0091] The dry air duct 2125 includes a dry air inlet pipe 21251 and a dry air outlet pipe 21252. The two ends of the dry air inlet pipe 21251 are respectively connected to the air purification device 31 and the main heat exchanger 2111. The air purification device 31 is connected to the main heat exchanger 2111 through the dry air inlet pipe 21251. The dry air outlet pipe 21252 includes two branch pipes 212521 and a main pipe 212522. One end of the main pipe 212522 is connected to the main heat exchanger 2111, and the end of the main pipe 212522 away from the main heat exchanger 2111 is simultaneously connected to one end of each of the two branch pipes 212521. The cooled dry air obtained by heat exchange in the main heat exchanger 2111 flows through the main pipe 212522 to the two branch pipes 212521. The ends of the two branch pipes 212521 furthest from the main pipe 212522 are both connected to the nitrogen purification tower 231. The temperature control assembly 2112 includes an auxiliary heat exchanger 21121 and an expander 21122, which are respectively installed on the two branch pipes 212521. The cooled dry air flowing through the two branch pipes 212521 is introduced into the auxiliary heat exchanger 21121 and the expander 21122 for further cooling. The auxiliary heat exchanger 21121 is installed in the portion of the oxygen-enriched air main pipe 21261 and the nitrogen pipe 2127 located between the first subcooler 21131 and the main heat exchanger 2111. The oxygen-enriched air and nitrogen flowing through the oxygen-enriched air main pipe 21261 and the nitrogen pipe 2127, respectively, located between the auxiliary heat exchanger 21121 and the first subcooler 21131, and introduced into the auxiliary heat exchanger 21121, serve as a cold source for exchanging heat with the cooled and dry air introduced into the auxiliary heat exchanger 21121 by the corresponding branch pipe 212521.

[0092] The second valve assembly 234 includes a dry air throttle valve 2342, which is installed in the portion of the branch pipe 212521, where the auxiliary heat exchanger 21121 is located, between the auxiliary heat exchanger 21121 and the nitrogen purification tower 231. The dry air throttle valve 2342 is used to depressurize the re-cooled dry air discharged from the auxiliary heat exchanger 21121 and directed to the nitrogen purification tower 231.

[0093] The second valve assembly 234 further includes a liquid nitrogen control valve 2343, which is installed on the liquid nitrogen pipe body 21262 and located on the side of the second subcooler 21132 away from the third drain pipe 2233. The liquid nitrogen control valve 2343 is used to adjust the flow rate of the heated liquid nitrogen discharged from the second subcooler 21132 to match the flow rate of the external liquid argon introduced into the second subcooler 21132, so as to ensure that the external liquid argon can be cooled to a predetermined temperature range.

[0094] Preferably, the temperature of the cooled dry air discharged from the main heat exchanger 2111 is -163 to -165°C, the temperature of the dried air after being cooled again by the auxiliary heat exchanger 21121 is -170 to -174°C, the temperature of the dried air after being depressurized and cooled again by the dry air throttle valve 2342 is -176 to -181°C, and the temperature of the cooled dry air discharged from the expander 21122 is -176 to -181°C. The temperature of the nitrogen discharged from the nitrogen purification tower 231 is -184 to -186°C, the temperature of the oxygen-enriched liquid discharged from the nitrogen purification tower 231 is -180 to -182°C, the temperature of the oxygen-enriched liquid discharged from the first subcooler 21131 is -181 to -183°C, and the temperature of the oxygen-enriched liquid after being depressurized by the oxygen-enriched liquid throttle valve 2341 is -186 to -189°C. The temperature of the liquid nitrogen discharged from the nitrogen tower condenser-evaporator 233 is -184 to -186°C. The temperatures of the oxygen-enriched gas discharged from the nitrogen tower condenser-evaporator 233 and the liquid nitrogen discharged from the second subcooler 21132 are both -184 to -186°C. The temperature of the external liquid argon introduced into the second subcooler 21132 is -155 to -160°C. After heat exchange in the second subcooler 21132, the temperature of the external liquid argon is -182 to -184°C. The temperatures of the oxygen-enriched air and nitrogen discharged from the first subcooler 21131 are both -175 to -178°C. The temperatures of the oxygen-enriched air and nitrogen discharged from the auxiliary heat exchanger 21121 are both -165 to -168°C. The temperatures of the oxygen-enriched air and nitrogen discharged from the main heat exchanger 2111 are both 10 to 20°C.

[0095] The following is a proposed method for operating an argon recovery device capable of stable distillation, comprising the following steps:

[0096] Dry crude argon gas is introduced into the main heat exchanger 2111 through the feed pipe 2121 to exchange heat and obtain cooled dry crude argon gas. The cooled dry crude argon gas is then introduced into the argon refining tower 221 to liquefy in the argon tower reboiler 222 within the refining tower 221 to obtain crude liquid argon. The crude liquid argon enters the first inlet pipe 2231 from the argon tower reboiler 222 and flows through the crude liquid argon throttle valve 2241. After being depressurized by the crude liquid argon throttle valve 2241, it is then introduced into the main heat exchanger 2111. The crude liquid argon after depressurization is introduced into the argon refinement column 221 and then distilled to obtain pure liquid argon placed at the bottom of the column and argon-nitrogen mixed gas rising to the top of the column. The pure liquid argon serves as a cold source for liquefying the cooled and dried crude argon gas in the reboiler 222 of the argon column. The pure liquid argon exchanges heat with the cooled and dried crude argon gas to partially vaporize and become part of the argon-nitrogen mixed gas. The pure argon gas rising in the argon refinement column 221 and the depressurized crude liquid argon flowing downward in the argon refinement column 221 undergo gas-liquid phase contact for mass and heat transfer.

[0097] The temperature sensor 2262 detects the temperature of the cooled, dried crude argon gas flowing through the feed pipe 2121 between the main heat exchanger 2111 and the argon tower reboiler 222 and directed to the argon tower reboiler 222. Based on the detected temperature of the cooled, dried crude argon gas, the operating speed of the nitrogen compressor 22611 is adjusted to regulate the flow rate of the dried nitrogen gas directed to the main heat exchanger 2111. The nitrogen compressor 22611 introduces dried nitrogen gas into the main heat exchanger 2111 through the first nitrogen conduit 21241 for heat exchange within the main heat exchanger 2111 to obtain cooled, dried nitrogen gas. Dry nitrogen gas is introduced into the nitrogen reboiler 22612 through the portion of the first nitrogen gas inlet pipe 21241 located between the nitrogen reboiler 22612 and the main heat exchanger 2111. A portion of pure liquid argon in the argon refining column 221 is introduced into the nitrogen reboiler 22612 through the pure liquid argon connecting pipe 2236. The pure liquid argon and the cooled dry nitrogen gas exchange heat in the nitrogen reboiler 22612 to obtain pure argon gas and liquid nitrogen. The pure argon gas is introduced into the argon refining column 221 through the pure argon gas connecting pipe 2237, and works in conjunction with the pure argon gas obtained by exchanging heat with the cooled dried crude argon gas in the argon column reboiler 222 to ensure the stable operation of the distillation process.

[0098] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0099] Part of the pure liquid argon in the refined argon tower 221 flows through the second inlet pipe 2232 and through the pure liquid argon throttle valve 2242. After being depressurized by the pure liquid argon throttle valve 2242, it is introduced into the argon tower condenser-evaporator 225. The argon-nitrogen mixture in the refined argon tower 221 is introduced into the argon tower condenser-evaporator 225 through the third inlet pipe 2233. External liquid argon is supplied to the argon tower condenser-evaporator 225 through the supplementary pipe 2234. At this time, the pure liquid argon and the external liquid argon exchange heat with the argon-nitrogen mixture to obtain pure argon gas, argon-nitrogen mixture and waste argon gas. The pure argon gas is discharged through the pure argon gas pipe 2122 and through the main heat exchanger 2111. The waste argon gas is discharged through the waste argon gas main pipe 21231 and through the main heat exchanger 2111. The pure argon gas and waste argon gas serve as the cold source for heat exchange in the main heat exchanger 2111.

[0100] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0101] After compression and removal of oil and dust, the crude argon gas flows through the first phase inlet 1121 and the heating group 1111 to be heated. It is then introduced into the catalytic reactor group 12, where the catalytic reactor group 12 removes carbon monoxide and oxygen from the heated crude argon gas to obtain crude argon gas containing carbon dioxide. Subsequently, the crude argon gas containing carbon dioxide flows into the second phase inlet 1122 and is cooled by the water cooler 1112 before being introduced into the argon gas precooling and purification system 13. The argon gas precooling and purification system 13 removes water and carbon dioxide from the crude argon gas containing carbon dioxide to obtain dry crude argon gas.

[0102] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0103] The liquid nitrogen obtained by heat exchange in the nitrogen reboiler 22612 enters the liquid nitrogen connecting pipe 2238 and flows through the liquid nitrogen throttle valve 2244. After being depressurized by the liquid nitrogen throttle valve 2244, it is introduced into the nitrogen condenser evaporator 22613. Part of the sludge argon gas in the sludge argon gas main pipe 21231 is introduced into the nitrogen condenser evaporator 22613 through the sludge argon gas branch pipe 21232. The sludge argon gas and liquid nitrogen exchange heat in the nitrogen condenser evaporator 22613 to obtain nitrogen gas and sludge liquid argon. The nitrogen gas obtained by heat exchange in the nitrogen condenser evaporator 22613 flows through the second nitrogen gas conduction pipe 21242 and through the main heat exchanger 2111 to serve as the cold source for heat exchange in the main heat exchanger 2111. After being heated, it is directed to the nitrogen compressor 22611.

[0104] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0105] The argon-nitrogen mixture in the argon tower condenser evaporator 225 is introduced into the refined argon tower 221 through the reflux pipe 2235. While the argon-nitrogen mixture flows downward in the refined argon tower 221, it undergoes heat and mass transfer with the argon-nitrogen mixture rising in the refined argon tower 221 to recover argon as much as possible.

[0106] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0107] The argon waste obtained by heat exchange in the nitrogen condenser evaporator 22613 is introduced into the argon purification tower 221 through the argon waste connection pipe 2239. While the argon waste flows downward in the argon purification tower 221, it undergoes heat and mass transfer with the argon-nitrogen mixture rising in the argon purification tower 221 to recover argon as much as possible.

[0108] The working method of the stable distillation argon recovery equipment further includes the following steps: the oxygen supply pipe 112112 is used to introduce air or oxygen into the feed pipe 112111 so that the ratio of carbon monoxide to oxygen is maintained at 2:1.

[0109] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0110] The catalytic reactor group 12 supplies crude argon containing carbon dioxide to the regenerator 11111 through the heat recovery pipe 11221 as a heat source for heating the crude argon introduced into the regenerator 11111. Subsequently, the crude argon containing carbon dioxide discharged from the regenerator 11111 flows into the water cooler 1112 through the second discharge pipe 11222 and is cooled by the water cooler 1112 before being introduced into the argon precooling and purification system 13.

[0111] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0112] After compression, air is introduced into the air purification device 31 to adsorb carbon dioxide and water, thus obtaining dry air. The dry air discharged from the air purification device 31 is introduced into the main heat exchanger 2111 through the dry air pipe 2125 to mix with pure argon gas introduced into the main heat exchanger 2111 through the pure argon gas pipe 2122, waste argon gas introduced into the main heat exchanger 2111 through the waste argon gas main pipe 21231, and the second nitrogen gas. The nitrogen gas introduced into the main heat exchanger 2111 through pipe 21242 is cooled by heat exchange. The cooled dry air discharged from the main heat exchanger 2111 flows to the temperature control component 2112 through the dry air pipe 2125 located between the main heat exchanger 2111 and the nitrogen purification tower 231. After being cooled again by the temperature control component 2112, it is guided to the nitrogen purification tower 231. The cooled dry air is then distilled in the nitrogen purification tower 231 to obtain oxygen-enriched liquid and nitrogen.

[0113] Nitrogen rising in the nitrogen purification tower 231 is introduced into the nitrogen tower condenser-evaporator 233 through the first guide pipe 2321. Oxygen-enriched liquid discharged from the lower end of the nitrogen purification tower 231 is introduced into the first subcooler 21131 through the second guide pipe 2322. After being cooled in the first subcooler 21131, it flows through the oxygen-enriched liquid throttling valve 2341 to be depressurized before being introduced into the nitrogen tower condenser-evaporator 233. Nitrogen and oxygen-enriched liquid exchange heat in the nitrogen tower condenser-evaporator 233 to obtain liquid nitrogen and oxygen-enriched gas. The liquid nitrogen flows back to the nitrogen purification tower 231 through the third guide pipe 2323. While flowing downwards in the nitrogen purification tower 231, the liquid nitrogen interacts with the further cooled and dried air rising in the nitrogen purification tower 231. Heat and mass transfer are performed to ensure continuous distillation. Oxygen-enriched air is introduced into the first subcooler 21131 through the oxygen-enriched air main pipe 21261 as a cold source for the oxygen-enriched liquid flowing through the first subcooler 21131. Liquid nitrogen discharged from the nitrogen tower condenser evaporator 233 to the third guide pipe 2323 flows through the liquid nitrogen pipe body 21262 and is introduced into the second subcooler 21132 as a cold source. The external liquid argon flowing through the second subcooler 21132 and guided to the argon tower condenser evaporator 225 through the supplementary pipe 2234 exchanges heat with the liquid nitrogen introduced into the second subcooler 21132 to cool down. This provides the argon tower condenser evaporator 225 with external liquid argon that remains subcooled, providing sufficient cooling while reducing liquid argon waste.

[0114] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0115] Liquid nitrogen heated by heat exchange in the second subcooler 21132 flows into the oxygen-enriched air main pipe 21261 to mix with the oxygen-enriched oxygen discharged from the nitrogen tower condenser evaporator 233 and be guided together to the first subcooler 21131. The liquid nitrogen and oxygen-enriched oxygen as a whole exchange heat with the oxygen-enriched liquid introduced into the first subcooler 21131 to obtain oxygen-enriched air.

[0116] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0117] The oxygen-enriched air obtained by heat exchange in the first subcooler 21131 is introduced into the air purification device 31 through the portion of the oxygen-enriched air main pipe 21261 located between the first subcooler 21131 and the air purification device 31, so as to serve as the regeneration gas of the air purification device 31.

[0118] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0119] The nitrogen gas discharged from the nitrogen tower 231 to the first guide pipe 2321 flows through the nitrogen pipe 2127 and is introduced into the first subcooler 21131 to serve as a cold source for heat exchange with the oxygen-enriched liquid introduced into the first subcooler 21131.

[0120] The operating method of the argon recovery equipment capable of stable distillation further includes the following steps:

[0121] Nitrogen gas heated by heat exchange in the first subcooler 21131 is introduced into the argon precooling and purification system 13 through the nitrogen pipeline 2127 located between the first subcooler 21131 and the argon precooling and purification system 13, as regeneration gas for the argon precooling and purification system 13.

[0122] Those skilled in the art should understand that the embodiments of this application described above and shown in the accompanying drawings are merely examples and do not limit the scope of this application. The advantages of this application have been fully and effectively implemented. The functional and structural principles of this application have been demonstrated and explained in the embodiments, and any variations or modifications can be made to the implementation of this application without departing from the stated principles.

Claims

1. An argon recovery device capable of stable distillation, characterized in that, The stable distillation argon recovery equipment includes a distillation system, which comprises: A temperature control mechanism, comprising a temperature control component and a conduit assembly, wherein the temperature control component includes a main heat exchanger, and the conduit assembly includes a feed pipe and a nitrogen pipe assembly. The main heat exchanger is mounted on the feed pipe, and dry crude argon gas is introduced into the main heat exchanger through the feed pipe and discharged after being cooled in the main heat exchanger. The nitrogen pipe assembly includes a first nitrogen conduit. Argon extraction unit, the argon extraction unit comprising: Argon refining tower; An argon reboiler is installed inside the refined argon column and located at the bottom of the column. The argon reboiler is connected to one end of the feed pipe. The cooled and dried crude argon gas obtained by heat exchange in the main heat exchanger is introduced into the argon reboiler through the portion of the feed pipe located between the main heat exchanger and the argon reboiler. The cooled and dried crude argon gas is liquefied in the argon reboiler to obtain crude liquid argon. The refined argon tube assembly includes a first inlet tube, a pure liquid argon connecting tube, and a pure argon gas connecting tube. The two ends of the first inlet tube are respectively connected to the lower end of the argon tower reboiler and the upper end of the refined argon tower. The first valve group includes a crude liquid argon throttling valve, which is installed on the first inlet pipe. Crude liquid argon enters the first inlet pipe from the argon tower reboiler and flows through the crude liquid argon throttling valve. After being depressurized by the crude liquid argon throttling valve, it is introduced into the refined argon tower. After being depressurized, the crude liquid argon is introduced into the refined argon tower and then distilled to obtain pure liquid argon placed at the bottom of the tower and an argon-nitrogen mixture rising to the top of the tower. The pure liquid argon serves as a cold source to liquefy the cooled and dried crude argon gas in the argon tower reboiler and exchanges heat with the cooled and dried crude argon gas to partially vaporize it as part of the argon-nitrogen mixture. The stabilizing component includes: The stabilization component includes: A nitrogen compressor is provided, with one end of the first nitrogen conduit connected to the nitrogen compressor. The main heat exchanger is installed on the first nitrogen conduit. The nitrogen compressor introduces dry nitrogen into the first nitrogen conduit, and the dry nitrogen is introduced into the main heat exchanger through the first nitrogen conduit to exchange heat and cool down in the main heat exchanger. The nitrogen compressor can operate at variable speed to adjust the flow rate of the dry nitrogen directed to the main heat exchanger. A nitrogen reboiler is installed at the other end of the first nitrogen gas inlet pipe. Cooled and dried nitrogen gas obtained from heat exchange in the main heat exchanger is introduced into the nitrogen reboiler through the portion of the first nitrogen gas inlet pipe located between the nitrogen reboiler and the main heat exchanger. The two ends of a pure liquid argon connecting pipe are respectively connected to the nitrogen reboiler and the lower end of the argon purification column. A portion of the pure liquid argon in the argon purification column is introduced into the nitrogen reboiler through the pure liquid argon connecting pipe. The pure liquid argon and the cooled dried nitrogen gas... Dry nitrogen gas is exchanged for heat in the nitrogen reboiler to obtain pure argon gas and liquid nitrogen. The two ends of the pure argon gas connecting pipe are respectively connected to the lower end of the argon purification column and the upper end of the nitrogen reboiler. The argon purification column is connected to the nitrogen reboiler through the pure argon gas connecting pipe. The pure argon gas obtained by heat exchange in the nitrogen reboiler is introduced into the argon purification column through the pure argon gas connecting pipe. It works together with the pure argon gas obtained by heat exchange and vaporization of the dried crude argon gas after cooling in the argon column reboiler to perform distillation on the depressurized crude liquid argon. A temperature sensing element is installed in the portion of the feed pipe located between the main heat exchanger and the argon tower reboiler. The temperature sensing element is used to detect the temperature of the cooled, dried crude argon gas flowing through the portion of the feed pipe located between the main heat exchanger and the argon tower reboiler and directed to the argon tower reboiler.

2. The argon recovery equipment capable of stable distillation according to claim 1, characterized in that, The argon extraction unit also includes an argon tower condenser / evaporator, which is installed at the top of the refined argon tower. The refined argon tube assembly includes a second inlet pipe, and the first valve assembly includes a pure liquid argon throttling valve. The two ends of the second inlet pipe are respectively connected to the lower end of the refined argon tower and the upper end of the argon tower condenser / evaporator. The pure liquid argon throttling valve is installed on the second inlet pipe. A portion of the pure liquid argon in the refined argon tower flows through the second inlet pipe and through the pure liquid argon throttling valve, where its pressure is reduced before being introduced into the argon tower condenser / evaporator. The refined argon tube assembly includes a third... The third inlet pipe has two ends connected to the high end of the refined argon tower and the high end of the argon tower condenser-evaporator, respectively. The refined argon tower is connected to the argon tower condenser-evaporator through the third inlet pipe to supply argon-nitrogen mixed gas from the refined argon tower to the argon tower condenser-evaporator. The refined argon pipe group also includes a supplementary pipe, one end of which is connected to the argon tower condenser-evaporator to provide external liquid argon to the argon tower condenser-evaporator. The pure liquid argon and the external liquid argon as a whole exchange heat with the argon-nitrogen mixed gas introduced through the third inlet pipe to obtain pure argon gas, argon-nitrogen mixed liquid, and waste argon gas.

3. The argon recovery equipment capable of stable distillation according to claim 2, characterized in that, The conduit assembly includes a pure argon gas pipeline and a waste argon gas pipeline. The waste argon gas pipeline includes a waste argon gas main pipe. One end of the pure argon gas pipeline and one end of the waste argon gas main pipe are both connected to the argon tower condenser-evaporator. The pure argon gas obtained by heat exchange in the argon tower condenser-evaporator is discharged through the pure argon gas pipeline, and the waste argon gas obtained by heat exchange in the argon tower condenser-evaporator is discharged through the waste argon gas main pipe. The main heat exchanger is installed on the pure argon gas pipeline and the waste argon gas main pipe. The pure argon gas flowing through the pure argon gas pipeline and the waste argon gas flowing through the waste argon gas main pipe and being introduced into the main heat exchanger serve as a cold source to exchange heat with the dry crude argon gas flowing through the feed pipe and being introduced into the main heat exchanger.

4. The argon recovery equipment capable of stable distillation according to claim 3, characterized in that, The refined argon tube assembly also includes a reflux pipe, the two ends of which are connected to the lower end of the argon tower condenser and the upper end of the refined argon tower, respectively. The argon tower condenser is connected to the refined argon tower through the reflux pipe so that the argon tower condenser can supply the refined argon tower with an argon-nitrogen mixture.

5. The argon recovery equipment capable of stable distillation according to claim 4, characterized in that, The stable distillation argon recovery equipment includes a raw material pre-removal system. This system includes a heat transfer component, which comprises a heat transfer assembly and a phase-connector assembly. The heat transfer assembly includes a heating assembly, and the phase-connector assembly includes a first phase-connector. The heating assembly is installed on the first phase-connector. After compression and removal of oil and dust, crude argon gas is introduced into the heating assembly through the first phase-connector. The heating assembly heats the crude argon gas. The raw material pre-removal system also includes a catalytic reactor assembly connected to one end of the first phase-connector. Heated crude argon gas obtained by the heating assembly is introduced into the catalytic reactor assembly through the first phase-connector. The catalytic reactor assembly removes carbon monoxide and oxygen from the heated crude argon gas to obtain crude argon gas containing carbon dioxide. The raw material pre-removal system also includes argon pre-cooling. The purification system includes a second phase connector, the two ends of which are connected to the catalytic reactor group and the argon precooling purification system, respectively. The catalytic reactor group is connected to the argon precooling purification system through the second phase connector. The heat transfer assembly also includes a water cooler, which is installed on the second phase connector. The crude argon gas containing carbon dioxide obtained from the catalytic reactor group is cooled by the water cooler and then directed to the argon precooling purification system. The argon precooling purification system is used to remove water and carbon dioxide from the crude argon gas containing carbon dioxide to obtain dry crude argon gas. The argon precooling purification system is connected to the other end of the feed pipe. The dry crude argon gas obtained from the argon precooling purification system is introduced into the main heat exchanger through the feed pipe.

6. The argon recovery equipment capable of stable distillation according to claim 5, characterized in that, The first phase connection includes an inlet pipe and a first outlet pipe. The heating group includes a regenerator and an electric heater. The regenerator is connected to one end of the inlet pipe to introduce crude argon gas into the regenerator through the inlet pipe. The regenerator is used to preheat the introduced crude argon gas. The electric heater is connected to the regenerator through a pipeline to introduce the preheated crude argon gas into the electric heater through the regenerator. The electric heater is used to reheat the preheated crude argon gas. The two ends of the first outlet pipe are respectively connected to the electric heater and the catalytic reactor group. The electric heater is connected to the catalytic reactor group through the first outlet pipe to introduce heated crude argon gas into the catalytic reactor group through the electric heater. The inlet pipe includes a feed pipe and an oxygen supply pipe. One end of the feed pipe is connected to the regenerator. Crude argon gas is introduced into the regenerator through the feed pipe. The oxygen supply pipe is connected radially to the feed pipe and is used to introduce air or oxygen into the feed pipe.

7. The argon recovery equipment capable of stable distillation according to claim 6, characterized in that, The second phase connection includes a heat recovery pipe and a second discharge pipe. The two ends of the heat recovery pipe are respectively connected to the catalytic reactor group and the regenerator. The catalytic reactor group is connected to the regenerator through the heat recovery pipe to introduce crude argon gas containing carbon dioxide into the regenerator as a heat source for heating the crude argon gas introduced into the regenerator. The two ends of the second discharge pipe are respectively connected to the regenerator and the argon gas precooling and purification system. The regenerator is connected to the argon gas precooling and purification system through the second discharge pipe. A water cooler is installed on the second discharge pipe. The crude argon gas containing carbon dioxide discharged from the regenerator flows into the water cooler through the second discharge pipe and is cooled by the water cooler before being introduced into the argon gas precooling and purification system.

8. The argon recovery equipment capable of stable distillation according to claim 5, characterized in that, The refined argon tube assembly also includes a liquid nitrogen connecting pipe, and the stabilization component also includes a nitrogen condenser / evaporator. The two ends of the liquid nitrogen connecting pipe are respectively connected to the high end of the nitrogen condenser / evaporator and the low end of the nitrogen reboiler. The nitrogen reboiler is connected to the nitrogen condenser / evaporator via the liquid nitrogen connecting pipe. The first valve assembly also includes a liquid nitrogen throttle valve, which is installed on the liquid nitrogen connecting pipe. Liquid nitrogen obtained from heat exchange in the nitrogen reboiler enters the liquid nitrogen connecting pipe and flows through the liquid nitrogen throttle valve. After being depressurized by the liquid nitrogen throttle valve, it is introduced into the nitrogen condenser / evaporator. The waste argon gas pipeline also includes a waste argon gas branch pipe. One end of the waste argon gas branch pipe is connected to the portion of the waste argon gas main pipe located between the main heat exchanger and the argon tower condenser / evaporator. A portion of the waste argon gas introduced from the argon tower condenser / evaporator into the waste argon gas main pipe passes through… The waste argon gas branch pipe is introduced into the nitrogen condenser evaporator. Waste argon gas and liquid nitrogen exchange heat in the nitrogen condenser evaporator to obtain nitrogen gas and waste liquid argon. The nitrogen gas pipeline group also includes a second nitrogen gas conduction pipe. The two ends of the second nitrogen gas conduction pipe are respectively connected to the high end of the nitrogen condenser evaporator and the nitrogen compressor. The main heat exchanger is installed on the second nitrogen gas conduction pipe. The nitrogen gas obtained by heat exchange in the nitrogen condenser evaporator is introduced into the main heat exchanger through the second nitrogen gas conduction pipe to exchange heat with the dry crude argon gas introduced into the main heat exchanger by the argon gas precooling and purification system and the dry nitrogen gas introduced into the main heat exchanger by the nitrogen compressor, and the nitrogen gas is heated up. After the nitrogen gas is heated up by heat exchange in the main heat exchanger, it is introduced into the nitrogen compressor through the part of the second nitrogen gas conduction pipe located between the main heat exchanger and the nitrogen compressor.

9. The argon recovery equipment capable of stable distillation according to claim 8, characterized in that, The refined argon tube assembly also includes a waste liquid argon connecting pipe, the two ends of which are respectively connected to the lower end of the nitrogen condenser evaporator and the upper end of the refined argon tower. The nitrogen condenser evaporator is connected to the refined argon tower through the waste liquid argon connecting pipe, and the waste liquid argon obtained by heat exchange in the nitrogen condenser evaporator is introduced into the refined argon tower through the waste liquid argon connecting pipe.

10. The operating method of the argon recovery device capable of stable distillation according to any one of claims 1 to 9, characterized in that, The operating method of the argon recovery equipment capable of stable distillation includes the following steps: Dry crude argon gas is introduced into the main heat exchanger through the feed pipe to exchange heat and obtain cooled dry crude argon gas. The cooled dry crude argon gas is introduced into the argon refining column to liquefy in the argon column reboiler to obtain crude liquid argon. The crude liquid argon enters the first inlet pipe from the argon column reboiler and flows through the crude liquid argon throttle valve. After being depressurized by the crude liquid argon throttle valve, it is introduced into the argon refining column. After being depressurized, the crude liquid argon is distilled in the argon refining column to obtain pure liquid argon placed at the bottom of the column and argon-nitrogen mixed gas rising to the top of the column. The pure liquid argon serves as a cold source for liquefying the cooled dry crude argon gas in the argon column reboiler. The pure liquid argon exchanges heat with the cooled dry crude argon gas to partially vaporize and become part of the argon-nitrogen mixed gas. The pure argon gas rising in the argon refining column and the depressurized crude liquid argon flowing downward in the argon refining column undergo gas-liquid phase contact for mass and heat transfer. The temperature sensor detects the temperature of the cooled, dried crude argon gas flowing through the feed pipe between the main heat exchanger and the argon tower reboiler and directed to the argon tower reboiler. Based on the detected temperature of the cooled, dried crude argon gas, the operating speed of the nitrogen compressor is adjusted to regulate the flow rate of the dried nitrogen gas directed to the main heat exchanger. The nitrogen compressor introduces dried nitrogen gas into the main heat exchanger through the first nitrogen conduit to exchange heat within the main heat exchanger, thus obtaining cooled, dried nitrogen gas. Dry nitrogen gas is introduced into the nitrogen reboiler through the portion of the first nitrogen gas inlet pipe located between the nitrogen reboiler and the main heat exchanger. A portion of pure liquid argon in the argon refining column is introduced into the nitrogen reboiler through the pure liquid argon connecting pipe. The pure liquid argon and the cooled dry nitrogen gas exchange heat in the nitrogen reboiler to obtain pure argon gas and liquid nitrogen. The pure argon gas is introduced into the argon refining column through the pure argon gas connecting pipe, and works in conjunction with the pure argon gas obtained by exchanging heat with the cooled dried crude argon gas in the argon column reboiler to ensure the stable operation of the distillation process.

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