669results about "Noble gas compounds" patented technology

The invention relates to a purification device system and method for oxygen, nitrogen and crude neon and helium, based on a non-low-temperature gas purification technology, hydrogen removal of crude neon and helium is coupled with regeneration of a nitrogen deoxidizing adsorbent, purification of nitrogen is coupled with a regeneration process of removing carbon dioxide and water from oxygen, and linkage purification and impurity removal of oxygen, nitrogen and crude neon and helium can be carried out. Therefore, efficient purification of nitrogen, oxygen and crude neon and helium is achieved.

The invention discloses a process system for separating and purifying helium from helium-containing natural gas, which comprises a pretreatment system, a membrane separation system, a VPSA decarburization system, a TSA refined removal system, a first pressurization system, a primary membrane separation system, a second pressurization system, a secondary membrane separation system, a third pressurization system, a PSA purification system and an alloy dehydrogenation system which are sequentially connected step by step through pipelines, the fourth pressurization system is arranged between the PSA purification system and the TSA refined removal system; the impermeable gas discharged by the membrane separation system is fed into a natural gas pipeline network; low-pressure desorbed gas discharged by the VPSA decarburization system and desorbed gas discharged by the TSA fine desorption system are used for being fed into a fuel pipe network; and impermeable gas discharged by the first-stage membrane separation system and desorbed gas discharged by the PSA purification system are used for refluxing to the TSA fine removal system. According to the process system, helium can be directly separated and purified from the helium-containing natural gas which is exploited from a gas field and pretreated, the helium recovery rate is high, the process flow is simple, and the energy consumption is low.

The invention discloses argon recovery equipment capable of achieving stable rectification and a working method thereof.The argon recovery equipment capable of achieving stable rectification comprises a rectification system, the rectification system comprises a temperature adjusting mechanism and an argon extraction unit, and the argon extraction unit comprises a pure argon tower, an argon tower reboiler, a pure argon pipe set, a first valve set and a stability increasing component; the stability augmentation component comprises a stability augmentation assembly and a temperature detection piece, and the stability augmentation assembly comprises a nitrogen compressor and a nitrogen reboiler. According to the amount of pure argon gasified through heat exchange between pure liquid argon obtained through rectification in the pure argon tower and dried crude argon obtained after cooling in the argon tower reboiler, the supply amount of dry nitrogen is adaptively adjusted through the stability augmentation component so as to adjust the amount of pure argon supplied to the pure argon tower by the nitrogen reboiler; the argon extraction unit and the argon tower reboiler are jointly matched with the actual working condition of the argon tower reboiler, so that the anti-interference capability of the argon extraction unit is improved, the stability of the rectification process is ensured, and the purity of the obtained pure argon is ensured.

The invention discloses a temperature swing adsorption helium low-temperature purification system which comprises a vacuum cold box, and a first-stage dividing wall heat exchanger, a liquid cold medium Dewar, a high-temperature area adsorption unit, a second-stage dividing wall heat exchanger, a cold head heat exchanger and a low-temperature area adsorption unit are sequentially connected in the vacuum cold box in the gas transmission direction. Wherein the input end of the first-stage dividing wall heat exchanger is connected with the outside through a pipeline, and is used for introducing crude helium; the high-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being greater than or equal to 77K in the crude helium, and the low-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being 20K-30K in the crude helium, so that high-purity helium is obtained. According to the invention, not only can high-flow high-component impurity gas with the boiling point of 77K or above be treated, but also high-flow high-component impurity gas with the boiling point of 30K or below can be treated, and high-flow multi-component high-concentration industrial production working conditions can be better matched by adopting physical adsorption of the high-temperature and low-temperature region adsorbents.

A process to purify helium from a feed gas stream containing a mixture of at least nitrogen, methane and helium including introducing the feed gas stream into a first helium membrane separation unit, thereby producing a first helium membrane permeate and a first helium membrane residue; introducing at least part of the first residue into a first nitrogen membrane separation unit thereby producing a first nitrogen membrane permeate stream; introducing a stream derived from the first helium membrane permeate into a hydrogen PSA unit thereby producing a helium rich product stream. Wherein a stream derived from the first nitrogen membrane permeate stream exits the system as a fuel gas product stream. Wherein the feed gas stream has a higher heating value, and wherein the first nitrogen membrane permeate stream has a higher heating value at least 5% higher than the higher heating value of the feed gas.

The invention provides an inert gas generation system, and relates to the technical field of industrial gas production. The inert gas generation system comprises the following modules: a gas pretreatment module, an intelligent separation module, a dynamic purification module, a pressure regulation and control module, a quality analysis module, a safety control module and an energy efficiency optimization module, and the gas pretreatment module is used for removing particulate matters through an electrostatic dust collection device by adopting a multi-stage gradient filtering algorithm based on ambient air input, adjusting humidity by combining a dew point control technology, forming a standardized gas source and generating a standard gas source. Through combination of a multi-stage gradient filtering algorithm and a dew point control technology, collaborative treatment of particulate matters and humidity is realized, stable gas source input is formed, the reliability of a subsequent processing link is improved, membrane separation parameters are dynamically predicted by applying a convolutional neural network model, and the permeation efficiency of a hollow fiber membrane stack is optimized.

The invention provides an oriented ultrathin FER zeolite molecular sieve membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing a monodisperse FER zeolite nanosheet with a high length-depth ratio through a hydrothermal method; preparing a seed crystal liquid, and coating the surface of a porous carrier with the seed crystal liquid to form an oriented seed crystal layer; and carrying out hydrothermal epitaxial growth in a secondary growth solution. Through innovative design of seed crystal synthesis and epitaxial growth, the FER zeolite membrane prepared by the method has a structure with high alpha-axis preferred orientation, submicron controllable thickness, compactness and no defect. The membrane can be used for accurately screening gas molecules with small size difference by utilizing six-membered ring pore channels uniformly arranged along an a axis. When helium and methane or carbon dioxide are separated, the membrane shows permeation flux and separation selectivity far superior to those in the prior art, provides a brand new technical approach for efficient and low-energy-consumption recovery of helium and other high-value gases in the industry, and has great industrial application value.

The helium extraction system is used for extracting helium in BOG and comprises a low-temperature rectification device, a catalytic dehydrogenation device, a drying device and a pressure swing adsorption device which are sequentially connected through a pipeline. The low-temperature rectification device can rectify and concentrate helium in BOG, the catalytic dehydrogenation device can catalytically oxidize hydrogen in the BOG and remove the hydrogen in the BOG, the drying device can remove moisture in the BOG, and the pressure swing adsorption device is a normal-temperature pressure swing adsorption device and can separate and purify the helium in the BOG; the low-temperature rectification device comprises a first compressor, a heat exchanger, a rectification tower, a condensation evaporator, a gas-liquid separator and a second compressor, the inlet end of the first compressor can be connected with a BOG gas source, and the first compressor, the rectification tower, the condensation evaporator and the gas-liquid separator are sequentially connected through pipelines; a connecting pipeline between the first compressor and the BOG gas source and a connecting pipeline between the first compressor and the rectifying tower respectively form a circulation loop through the heat exchanger, the second compressor and the condensation evaporator; according to the extraction system, the number of dynamic equipment and static equipment in an existing device for extracting helium from BOG is reduced, the input cost is reduced, and the energy consumption and the operation difficulty are reduced.

The invention relates to an air pre-impurity-removal control method and system for enrichment and separation of Kr, and relates to the technical field of gas separation and purification, and the air pre-impurity-removal control method comprises the following steps: removing impurity components in air through an impurity removal device to obtain air subjected to impurity removal treatment; carrying out multi-stage enrichment and separation treatment on the air subjected to impurity removal treatment to obtain enriched Kr gas; and introducing the enriched Kr gas into a chromatographic separation device, and separating krypton from other inert gases to obtain a target krypton component. The problems that in the traditional Kr enrichment and separation process, due to the fact that air impurities are prone to icing, the device is blocked, the multi-stage separation parameter adaptability is poor, and the enrichment efficiency is low are solved, and through pre-impurity removal of intelligent parameter configuration and multi-stage enrichment of gradient temperature control, the Kr separation stability, the enrichment efficiency and the target component purity are improved.

The present invention relates to the technical field of special gas purification, and specifically discloses a porous adsorption material for removing neon from helium and a preparation method thereof. The method comprises the following steps: (1) preparing a lignin raw material treated by fermentation; (2) preparing a carbon precursor; (3) placing the carbon precursor in a mixed solution containing a metal salt and a surfactant, stirring and impregnating to obtain a carbon precursor impregnated with the metal salt; (4) washing the carbon precursor impregnated with the metal salt to remove the excessively deposited metal salt, and drying to obtain a washed carbon precursor; (5) activating and creating pores in the washed carbon precursor with carbon dioxide at a high temperature to obtain a porous adsorption material for removing neon from helium. The porous carbon adsorption material prepared by the present invention using renewable natural biomass raw materials has a uniformly distributed pore structure and has a high adsorption and capture ability for neon under low-temperature conditions, and can effectively remove neon impurities in helium.

The invention relates to a Kr separation method and system based on selective desorption, a terminal and a storage medium, and relates to the technical field of rare gas purification. Calculating the difference between the quotient of the historical krypton loss amount and the adsorption column mass and the initial unit krypton adsorption amount to generate the actual unit krypton adsorption amount; calculating the quotient between the product of the actual unit krypton adsorption quantity and the mass of the adsorption column and the flow velocity of the single to-be-adsorbed air so as to generate actual adsorption time; controlling the first-stage adsorption column to adsorb the to-be-adsorbed air according to the actual adsorption time so as to generate a to-be-separated adsorption column; controlling the adsorption column cleaning device to clean the adsorption column to be separated according to the actual unit krypton adsorption quantity, and collecting desorbed gas after cleaning to the waste gas storage device; and performing desorption operation on the cleaned adsorption column, controlling a gas collection device to collect desorbed gas, and heating and activating the first-stage adsorption column to recover the adsorption capacity. The application has the effect of reducing krypton loss.

The invention discloses a recovery device and method of rare gas He for CVD (chemical vapor deposition) atmosphere, and relates to the field of rare gas recovery, the recovery device of rare gas He for CVD atmosphere comprises an alkaline drying device, a primary filtering device, a helium recovery membrane group, a trace impurity removal device and a precision filtering device which are connected in sequence, the alkaline drying device is connected with a waste gas outlet of the CVD reactor, the primary filtering device is used for preliminarily filtering waste gas to remove particle dust, and an outlet of the precision filtering device is connected with the helium recovery membrane group, so that high-purity helium obtained by the precision filtering device is circularly purified. And efficient recovery and purification of the rare gas He in the CVD atmosphere are realized. By means of the circulating purification design, the helium recovery rate is increased, product losses caused by one-time treatment are effectively reduced, and therefore resource waste is reduced.

The invention discloses a light adsorption-desorption-resistant adsorption tower, a coating process, a helium purification system and a helium purification method, and mainly aims to solve the problem that in the prior art of natural gas helium purification, adsorption tower equipment is aged and corroded, and the purity stability of a helium product is influenced by adsorption and desorption formed by the adsorption tower. The light adsorption tower resistant to adsorption and desorption is provided, the service life of adsorption equipment is prolonged while the purity stability of a helium product is improved, and meanwhile the cost of helium purification through adsorption is reduced through the structural design of a helium purification system.

The invention belongs to the technical field of tail gas treatment, and relates to a device system and a method for recovering helium from semiconductor manufacturing process tail gas, by adopting a composite device system of an adsorption device, a membrane separation assembly and a gas purification tower, the recovery and purification operation of low-concentration helium containing toxic, corrosive and various rare gas mixed working conditions can be completed, and the helium recovery efficiency is improved. The recovered helium can be purified to 99.999% or above, the recovery rate is high, the purity is high, front and back gas heat exchange is fully utilized, the energy consumption is low, and the helium supply source is further widened; the device system is free of gas emptying in the whole process, reflows, collects and discharges back to a tail gas pipeline, and is suitable for various manufacturing processes of semiconductors.

The invention discloses a normal-temperature natural gas helium extraction and purification system and purification method. The system comprises a first-stage membrane separator, a second-stage membrane separator, a third-stage membrane separator, a pressure swing adsorption unit and the like, helium in natural gas is primarily concentrated through the first-stage membrane separator, after impurities are removed, the natural gas enters the third-stage membrane separator to be further concentrated, and permeated gas enters the second-stage first-section membrane separator to be concentrated to be high in concentration; the helium content in the impermeable gas is extremely low, and the impermeable gas returns to a pipe network; the permeated gas of the second-stage first-section membrane separator enters a fine dehydrogenation unit and a pressure swing adsorption unit, and then high-purity helium is produced; the impermeable gas of the second-stage first-section membrane separator enters the second-stage second-section membrane separator and then returns to the system for circulation; the impermeable gas of the second-stage second-section membrane separator returns to the third-stage membrane separator for recycling; and desorbed gas of the pressure swing adsorption unit returns to an outlet of the first-stage membrane separator for circulation. According to the system, helium in natural gas is purified by adopting very low energy consumption, helium in boil off gas (BOG) in the natural gas liquefaction process can also be purified, and a very good application effect is achieved.

Disclosed is a gas separation arrangement for separating and containing various types of gas from a collection chamber based on their different atomic masses. The chamber is connected to an ion diverter via a valve that when open permits the various types of gas to migrate from the collection chamber to an ionizer where the gas is ionized. The ionized gas is accelerated through an ion accelerator and dispensed into an ion deflector. The ion deflector comprises a magnetic field within a channel defined by a pair of split-pole magnets. The trajectory of the ions is based on the mass of the ions, which separates the ions. Multiple collectors are positioned at different locations on an exit side of the ion deflector to receive the different ions traveling along their respective trajectories.

The utility model relates to the technical field of helium purification, and discloses helium purification equipment which comprises a purification box, a collection box and a transverse plate installed between the purification box and the collection box, the upper surface of the transverse plate is connected with two symmetrically-arranged filter boxes, the two sides of the two filter boxes are fixedly connected and communicated with gas conveying pipes, and the gas conveying pipes are communicated with the collection box. The four gas conveying pipes are communicated with the purification box and the collection box respectively, the outer walls of the four gas conveying pipes are fixedly connected and communicated with valves, box covers are hinged to the tops of the adjacent sides of the two filter boxes, locking pieces are connected to the other sides of the two box covers, and the other sides of the two locking pieces are connected with the two filter boxes respectively. And a sealing gasket is connected between the box cover and the filter box. According to the helium purification equipment, the two filter boxes are installed on the transverse plate, when a filter material in one filter box is replaced, continuous filtering of helium can be kept through the other filter box, the helium filtering efficiency is further improved, and it is ensured that helium filtering operation is continuously carried out.

The invention discloses a pressure buildup device and a pressure buildup method for low-temperature purification of helium. The pressure buildup device comprises a flash evaporation unit, a purification unit and a heat regeneration unit which are connected in sequence. According to the invention, through the arrangement of the pressure buildup device, the product gas of the liquid-air separator can be used for carrying out pressure buildup on the adsorber under regeneration pressure buildup in a medium-high pressure working state, so that the adsorber under the regeneration pressure buildup in the working state is prevented from pressurizing the adsorber under the regeneration pressure buildup, and the pressure of the adsorber under the working state is prevented from being lost; due to the fact that the pressure difference between a liquid-air separator and an adsorber under regeneration pressure buildup is large, middle-high pressure impact is prone to causing equipment damage, meanwhile, the pressure buildup process is conducted in the purification process, the time needed by pressure buildup is shortened, after the adsorber in the working state is saturated, pressure buildup of the adsorber in the regeneration state is completed, automatic switching can be achieved, and the efficiency is improved. And the high-purity helium is continuously produced, so that the use requirement of the high-purity helium is met.

The invention discloses anti-interference argon recovery equipment and a working method thereof.The anti-interference argon recovery equipment comprises a rectification system, the rectification system comprises a temperature adjusting mechanism and an argon extraction unit, the temperature adjusting mechanism comprises a temperature adjusting component and a conduction pipe set, and the temperature adjusting component comprises a main heat exchanger; the main heat exchanger comprises a heat exchange main body and a built-in pipe group, the conduction pipe group comprises material passing pipes, the material passing pipes comprise a material feeding pipe and a material discharging pipe, the material discharging pipe comprises two material distributing pipes and a gathering pipe, and the argon extracting unit comprises a pure argon tower, an argon tower reboiler, a pure argon pipe group, a first valve group and an anti-interference assembly. The anti-interference assembly comprises an adjusting valve group and a temperature detection part. The adjusting valve group comprises a first adjusting valve and a second adjusting valve. According to the invention, the heat exchange amount during heat exchange of the dried crude argon entering the argon tower reboiler after being cooled is kept constant, so that the stability of the rectification working condition is ensured.

The invention discloses argon recovery equipment with the high extraction rate and a working method thereof.The argon recovery equipment with the high extraction rate comprises an argon extraction unit, the argon extraction unit comprises a pure argon pipe set, a first valve set and an argon extraction mechanism, and the pure argon pipe set comprises a first treatment pipe set and a second treatment pipe set; the first treatment pipe group comprises a first material receiving pipe, a second material receiving pipe and a liquid nitrogen connecting pipe, the second treatment pipe group comprises a first dirty argon guide pipe, a dirty liquid argon guide pipe, two backflow pipes, a second dirty argon guide pipe and a supplementing pipeline, and the first valve group comprises a feeding throttling valve and a first liquid nitrogen throttling valve. The argon extraction mechanism comprises a crude liquid argon treatment component and a dirty argon treatment component, the crude liquid argon treatment component comprises a pure argon tower and a nitrogen reboiler, the dirty argon treatment component comprises a nitrogen evaporator and a re-extraction assembly, and the re-extraction assembly comprises an argon synergistic tower. Compared with a common recovery mode, the treatment efficiency is high, the extraction rate of argon reaches 98% or above, and waste of argon resources is reduced.

The present invention relates to a method for separating helium and neon, which comprises adsorbing and separating a mixed gas containing helium and neon with an adsorbent containing a metal organic framework material, wherein the metal organic framework material comprises a metal ion and an organic ligand, wherein the organic ligand comprises a compound shown in Formula I; and the metal ion is selected from transition metal ions. The metal organic framework material of the present invention has low raw material price, mild synthesis conditions, simple operation, easy post-treatment, and good stability. At the same time, the metal organic framework material is used for low-temperature adsorption separation with a high neon adsorption capacity. Compared with the existing helium-neon low-temperature separation process, it has significant advantages such as low energy consumption, low equipment requirements, and simple process, and has broad industrial application prospects.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

The invention relates to the technical field of solid separation, in particular to the high-end equipment manufacturing industry, in particular to an efficient low-temperature adsorption method helium purification device which comprises a machine body and a material control assembly, a purification cavity is formed in the machine body, helium can flow in the purification cavity from top to bottom, and an adsorbent can also flow in the purification cavity from top to bottom; the material control assembly is used for regulating and controlling the motion state of the adsorbent, the material control assembly has a first control state, and when the material control assembly is in the first control state, the material control assembly is used for mixing and stirring the adsorbent in the purification chamber. According to the helium purification device, the material control assembly is arranged, and when the material control assembly is in the first control state, the material control assembly is used for stirring and mixing the adsorbent in the purification cavity, so that the adsorbent in the purification cavity is in uniform and full contact with helium, impurities in the helium are removed, and the purity of the helium is improved.

The invention discloses a metal organic framework material composite membrane as well as a preparation method and application thereof. The metal organic framework material composite membrane provided by the invention comprises a substrate, a hydrophilic layer, an adsorption layer and a fixing layer which are sequentially stacked, the fixing layer covers the surface of the adsorption layer and is connected with the hydrophilic layer; the adsorption layer contains a carbonized metal organic framework material, and the fixing layer contains a hydrophilic polymer. The carbonized metal organic framework material is used as the adsorption layer, and the material has a rich mesoporous structure and a high specific surface area, so that the adsorption activity of the composite membrane is improved; the hydrophilic layer is matched with the fixing layer, so that the adsorption layer can be simply, efficiently and firmly fixed in the membrane material, the composite membrane with good adsorption performance, high mechanical performance and good stability is formed, and the composite membrane has a good application prospect in gas adsorption and enrichment, especially in krypton and / or xenon adsorption and enrichment.

The invention discloses a metal ion modified molecular sieve for adsorbing and purifying electronic gas helium as well as a preparation method and application of the metal ion modified molecular sieve. The synthesis method comprises the following steps: adding SSZ-13 molecular sieve powder into a metal salt aqueous solution, stirring at a second preset temperature for a second preset time, filtering with water, and drying to obtain the metal ion modified SSZ-13 molecular sieve material. The SSZ-13 molecular sieve material with proper pore diameter and strong pore surface polarity is prepared by performing accurate metal ion exchange on the SSZ-13 molecular sieve, and the SSZ-13 molecular sieve material not only has relatively high adsorption capacity on neon, but also has very low adsorption capacity on helium. Therefore, the material can preferentially and selectively adsorb neon in helium, and the purpose of producing high-purity helium can be achieved.

The invention belongs to the technical field of gas membrane separation, and discloses a preparation method of a fluorinated MOFs (Metal-Organic Frameworks) mixed matrix membrane for efficiently extracting hydrogen / helium from natural gas. CF3 is introduced into an MOFs framework to prepare fluorinated MOFs, and introduction of CF3 reduces the aperture of MOFs, enhances the molecular sieving effect, and improves the diffusion selectivity of H2 (He) / CH4. In addition,-CF3 has an inhibition effect on CH4 adsorption, and the dissolution selectivity of H2 (He) / CH4 separation is improved. The existence of-CF3 in the fluorinated MOFs can induce the MOFs and the polymer to form dipole-dipole interaction (C-F... O = C), so that the filler and the polymer have good interfacial compatibility, the improvement of the filler loading capacity is facilitated, and meanwhile, the generation of non-selective defects at an interface is avoided. The mixed matrix membrane prepared by the method has important significance in the field of high-efficiency hydrogen / helium extraction of natural gas.

The invention discloses a porous carbon particle adsorption material capable of preparing ultra-pure helium through one-step purification as well as a preparation method and application of the porous carbon particle adsorption material. The method comprises the following steps: (1) carbonizing biomass particles; (2) dipping the carbonized biomass particles in a nitrogen source-containing aqueous solution; (3) carrying out CO2 activation pore-forming and nitrogen functional group doping on the nitrogen source impregnated carbonized biomass particles obtained in the step (2) at high temperature; and (4) fully activating the nitrogen source impregnated carbonized biomass particles, performing programmed cooling, and introducing water vapor to perform secondary pore forming and oxygen functional group doping to obtain the porous carbon material. According to the method, the porous carbon particle adsorbent is prepared from natural biomass, the pore size distribution is concentrated, nitrogen and oxygen containing functional groups are rich, the adsorbent has ultrahigh adsorption and capture capacity on various impurities in the crude helium under the low-temperature condition, the impurities in the crude helium can be removed in one step, the helium is purified to reach the 6N standard, and the method is suitable for industrial production. And the application requirement of high-efficiency removal of impurities in the production process of ultra-pure helium is met.

The invention discloses a composite polyimide film for separating and purifying helium. The composite polyimide film is obtained by wrapping a layer of polyimide film on the periphery of a carbon molecular sieve film. Compared with a polyimide film and a carbon molecular sieve film, the composite polyimide film has the advantages that the selectivity of helium to nitrogen and / or methane is remarkably improved, the permeability is high, the composite polyimide film is used for separating and purifying helium and nitrogen and / or helium in methane, helium can be effectively and quickly separated out, and meanwhile, the composite polyimide film has better reusability. The invention discloses application of the composite polyimide film to separation and purification of helium from helium and mixed gas of at least one of nitrogen and methane.

The utility model discloses an ultrapure xenon purification system which comprises a xenon purification filtering tank and an end cover arranged at the top of the xenon purification filtering tank, a placing ring is fixed on the inner wall of the lower side of the center of the xenon purification filtering tank, and a purification filtering element is fixed at the upper end of the placing ring. The xenon purifying and filtering tank of the ultra-pure xenon purifying system is characterized in that the purifying and filtering element and the placing ring are sealed through a rubber pad, so that xenon which is not purified and filtered is prevented from leaking upwards through a contact gap between the purifying and filtering element and the placing ring. The purification synergistic device can play a role in secondary filtration and purification after the purification filter element filters and purifies the xenon, so that the content of impurities in the xenon which is finally filtered and purified is less, the variety of the impurities is less, and the filtration and purification effect on the xenon can be improved.

The invention provides application of a silver modified AFX molecular sieve in xenon and krypton gas separation, and belongs to the technical field of gas separation. According to the invention, silver ions with electronegativity are introduced into AFX molecular sieve pores through ion exchange, selective adsorption of xenon is realized through the AFX topological molecular sieve subjected to Ag exchange so as to enrich xenon, and excellent separation of xenon and krypton is finally realized. The xenon and krypton adsorption isotherm of the silver modified AFX molecular sieve under the condition of 25 DEG C is tested, and the IAST (ideal adsorption solution theoretical value) of the molecular sieve is analyzed to be 36.5 through a static adsorption curve; according to the method disclosed by the invention, a dynamic penetration test is carried out under trace Xe and Kr concentrations by simulating the waste gas subjected to UNF post-treatment, and the dynamic capacity of Xe is calculated to be 104 mmol kg <-1 >, which is superior to that of other reported materials.