137 results about "Krypton" patented technology

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 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 multi-band enhanced infrared optical comb spectrum rare gas detection system in a hollow cavity of building glass, which is characterized in that a line scanning optical frequency comb light source module and a reflective array module jointly form a virtual enhanced cavity to enhance the optical path of an emitted fan-shaped optical comb light beam so as to improve the detection precision; rapid switching of multi-band gas is achieved through an electric filter wheel according to sequential control so as to detect different gases, gas data in a hollow cavity are collected in real time by combining the high-speed collection capacity of a dual-band area array detection module, and a concentration distribution cloud chart of argon and krypton is rapidly constructed based on a data terminal processing module; the detection efficiency and accuracy of the gas in the glass hollow cavity are greatly improved, the synchronous operation of space scanning and wave band switching is realized, and multi-dimensional data of the concentration, the position and the impurity content of multiple gases can be measured and obtained at a time; a polarization filtering function and a temperature field compensation algorithm are integrated, and the detection precision under outdoor strong light and temperature difference environments is ensured.

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.

The invention relates to the technical field of krypton and xenon purification, in particular to a device for low-temperature rectification and concentration of krypton and xenon. Comprising a cooling compression tower, a rectifying tower and a purifying tower, mixed gas containing krypton and xenon is cooled and compressed by the cooling compression tower and poured into the rectifying tower, and then nitrogen and oxygen are separated out by the rectifying tower and then flow into the purifying tower; the purifying tower comprises a tower body and a tower base at the bottom of the tower body; an upper baffle plate and a lower baffle plate are arranged in the tower body; a first air outlet groove is formed in the upper baffle disc in an up-down penetrating manner; a first air inlet groove corresponding to the first air outlet groove is formed in the lower baffle disc in an up-down penetrating manner; according to the purification tower disclosed by the invention, the molecular sieves in the separation cavities are driven to rotate between the upper baffle disc and the lower baffle disc through the rotation of the plurality of separation plates, so that the plurality of separation cavities are sequentially communicated with the first gas outlet groove, the blocked molecular sieves can be smoothly replaced, the purification effect of the purification tower on krypton-xenon gas is ensured, and the purity of the krypton-xenon gas is higher.

Heavy inert gas insulation layers are provided for one or more components of a launch system for a plurality of missiles. The layer may be integrated into the walls of the components or provided in inserts attached to the components. An inert gas fills a sealed void space in the walls or the insert. The inert gas has a density of at least 1.5 Kg / m3 and a thermal conductivity (Tcond_gas) of no greater than two-thirds of a thermal conductivity of air (Tcond_air) to form the heavy inert gas insulation layer. The inert gas may be Argon, Krypton, Xenon or a synthetic gas and is suitably held at a pressure of 760 Torr (1 atmosphere) or greater at sea level. The heavy inert gas insulation layer delays desensitization or inhibits premature reaction of the energetic materials inside the missiles due to high external temperatures. The insulation layers allow for more compact and dense configurations of the launch system and missiles.

Method for forming a magnetoresistive element by forming a sense layer having a free sense magnetization, a reference layer having a fixed reference magnetization, wherein the reference layer is formed by deposition in a Krypton atmosphere, a tunnel barrier layer between the reference layer and the sense layer, and a hard layer having a fixed reference magnetization layer opposite to that of the reference layer. The magnetoresistive element may be configured to measure an external magnetic field oriented substantially perpendicular to the plane of the reference layer. The reference magnetizations of the reference and hard layers may be oriented substantially perpendicularly to the plane of the reference and hard layers. The sense magnetization may have a vortex configuration in the absence of an external magnetic field.

Heavy inert gas insulation layer(s) are provided for containers configured to contain components that include an energetic material. The heavy inert gas insulation layer delays desensitization or inhibits premature reaction of the energetic material due to high external temperatures. The layers may be formed in hollow walls of the container itself or as inserts that are attached to the container. An inert gas fills a sealed void space in the walls or the insert. The inert gas has a density of at least 1.5 Kg / m3 and a thermal conductivity (Tcond_gas) of no greater than two-thirds of a thermal conductivity of air (Tcond_air) to form the heavy inert gas insulation layer. The inert gas may be Argon, Krypton, Xenon or a synthetic gas and is suitably held at a pressure of 760 Torr (1 atmosphere) or greater at sea level.

The present disclosure generally relates to topological semi-metal (TSM) based spin-orbit torque (SOT) devices, and methods of forming a TSM layer. The TSM layer of the SOT device comprises YPtBi having a 1:1:1 stoichiometry. The YPtBi has a density between about 9.7 g / cc to about 11.2 g / cc. Kr, Ar, or Xe gas is used to sputter the YPtBi to form the YPtBi layer or film. Trace amounts of Kr, Ar, or Xe are detectable in the YPtBi layer, where the YPtBi layer comprises about 1% of Kr, Ar, or Xe. One or more targets comprising YPtBi; YPt and Bi; PtBi and Y; Y, Pt, and Bi; or YBi and Pt can be used when forming the YPtBi layer. In embodiments where two targets are used to form the YPtBi layer, different amounts of power may be applied to each target.

The invention discloses a coil excitation Hall thruster magnetic circuit structure suitable for a krypton working medium, relates to the technical field of aerospace technology and plasma propulsion, and solves the problems of low ionization efficiency and insufficient characteristic length of an existing Hall thruster after krypton is used. A magnetic conductive inner core is arranged at one end of a bottom plate, and a magnetic conductive cover is arranged at the other end; an inner magnetic pole is arranged at the upper end of the magnetic conductive inner core; an inner coil is arranged between the inner magnetic pole and the bottom plate and corresponds to the outer side of the magnetic conductive inner core; an outer coil is arranged between the outer magnetic pole and the bottom plate and corresponds to the inner side of the magnetic conductive cover; a ceramic channel is arranged between the inner coil and the outer coil; the bottom plate comprises an inner bottom plate and an outer bottom plate, the inner bottom plate and the outer bottom plate are coaxially arranged, and a bottom plate gap is formed between the inner bottom plate and the outer bottom plate. The characteristic length of a magnetic field in a discharge channel can be remarkably prolonged, the krypton ionization efficiency is improved, and meanwhile the structure of the thruster is simplified.

The utility model relates to a molecular sieve device for krypton and xenon production, which comprises a pipeline with a rectangular section, a plurality of screening mechanisms are arranged on the pipeline along the length direction, a plurality of strip-shaped insertion holes which vertically extend are arranged on the right side wall of the pipeline and are in one-to-one correspondence with the screening mechanisms, and the screening mechanisms can be inserted into the strip-shaped insertion holes; the screening mechanism comprises a rectangular frame body, the two faces of the frame body are both covered with net faces, and the frame body is filled with molecular sieve filler. A vertically-through upper opening is formed in the top edge of the frame body, and a vertically-through lower opening is formed in the bottom edge of the frame body. The right side edge of the frame body is provided with a horizontally-through plugboard hole, and the plugboard hole corresponds to the position of the lower opening; and the plug board penetrates through the plug board hole and extends into the lower opening. The multi-stage screening mechanism is adopted, compared with the prior art, a better impurity gas removing effect is achieved, the molecular sieve filler of a certain screening mechanism can be replaced according to needs, and the replacement process is simpler.

This invention discloses a covalent organic framework for the separation of krypton and xenon gases and its preparation method. Using tetrahedral symmetric aldehyde ligands with four sites and amino ligands with different side group substitution sites as raw materials, o-dichlorobenzene and n-butanol as solvents, and glacial acetic acid as catalyst, a covalent organic framework compound with a 7-fold interpenetrating PTS topological network structure is synthesized through pre-ultrasonic treatment, high-temperature reaction process, and purification steps such as filtration and extraction. The synthesized covalent organic framework compound can selectively adsorb and separate xenon-krypton mixed gases.

The invention discloses a method for adsorbing and separating high-purity gas, which belongs to the technical field of chemical separation and comprises the following steps of: separating and purifying mixed gas or isotope by using an adsorption separation medium; the adsorption separation medium is a microporous metal organic framework material which is thermally synthesized from divalent metal salt and a ligand 1, 5-dihydrobenzo [1, 2-d: 4, 5-d '] bis ([1, 2, 3] triazole) through a solvent. The microporous metal organic framework material has a uniformly distributed microporous structure, a high specific surface area and excellent thermal stability and chemical stability, and high-selectivity separation of rare gas xenon / krypton, methane / propane / ethane, propylene / ethylene, ethane / ethylene and xenon isotopes can be realized through pressure swing / temperature swing adsorption; the adsorbent has ultrahigh adsorption and storage capacity for xenon, propane, propylene and ethane, and high-purity (greater than or equal to 99.99%) xenon, krypton, methane, ethylene and ethane and high-purity isotopes of 129Xe and 131Xe can be obtained after separation.

The invention relates to the technical field of refrigerants, in particular to a multi-component mixed refrigerant suitable for a temperature zone of-86 DEG C. The multi-component mixed refrigerant comprises a second group of substances, a fourth group of substances, a first group of substances, a third group of substances or one of the first group of substances and the third group of substances, and the first group of substances is methane R50, krypton R784 or a mixture of methane R50 and krypton R784; the second group of substances is ethylene R1150, ethane R170, xenon Xe or a mixture thereof; the third group of substances is propane R290, propylene R1270 or a mixture of the propane R290 and the propylene R1270; and the fourth group of substances is R601a, R601, R600a, R600 or a mixture of at least two of R601a, R601, R600a and R600. According to the refrigerant, by designing the components and the mass ratio of the refrigerant, efficient refrigeration in the temperature zone of-86 DEG C is achieved, meanwhile, it is ensured that the total amount of hydrocarbon refrigerant in a single refrigeration cycle is not larger than 150 g, the refrigerant is suitable for a heat regeneration and exchange type single-component cycle (LHR) refrigeration system, and the refrigeration efficiency and the system stability can be remarkably improved.

Various embodiments include a thermally packaged atomic device. The thermally packaged atomic device includes an atomic vapor unit, a heater, and a housing. The atomic vapor unit is located within the housing. The heater heats the atomic vapor unit. The housing is filled with a gas selected to have a thermal conductivity less than that of air. The gas having a thermal conductivity less than that of air may include xenon or krypton. The enclosure surrounds the atomic vapor unit with a gas.

The main problem to be addressed by the present invention is to provide: a method for detecting an air leak present in a luminal organ with high reliability; and an agent for detecting an air leak.　As a means for solving the problem, provided are: a method for detecting an air leak present in a luminal organ, the method including a step for detecting the air leak by using CT to detect leakage, from the luminal organ, of at least one type of gas selected from the group consisting of xenon, krypton, and argon; and an agent for detecting an air leak present in a luminal organ, the agent containing at least one type of gas selected from the group consisting of xenon, krypton, and argon.

The utility model relates to a nitrogen recycling device in a krypton-xenon refining system. Comprising a krypton and xenon feed gas pipeline, the krypton and xenon feed gas pipeline is connected with a light component removal rectification part through a water removal unit, a tower kettle liquid outlet pipeline of the light component removal rectification part is connected with a krypton and xenon separation tower, the light component removal rectification part comprises a light component removal rectification tower, and a gas phase outlet of the light component removal rectification tower is connected with a condenser tube pass. A tube pass outlet of the condenser is respectively connected with a reflux inlet of the light component removal rectifying tower and a liquid oxygen storage tank; the moisture removal unit comprises a first channel of a first heat exchanger, and the first channel of the first heat exchanger is connected with a light component removal rectifying tower through an adsorber and a first channel of a second heat exchanger; the liquid nitrogen storage tank is connected with the regenerated gas buffer tank for the adsorber through a shell pass of the condenser and a second channel of the second heat exchanger; an outlet of the regenerated gas buffer tank for the adsorber is connected with the adsorber; the device is simple in structure and reasonable in design, and can realize long-time stable operation of a krypton and xenon refining system while realizing effective utilization of nitrogen cooling capacity and self.

The invention discloses a high and low temperature control device for krypton-85 temperature swing adsorption separation in the atmosphere. The high and low temperature control device comprises a refrigerating machine, a helium compressor, a vacuum chamber, a vacuum pump, an activated carbon adsorption trap, a heating piece, a heat insulation piece and an adjusting assembly. The refrigerating machine is mounted on the vacuum chamber, a cold head of the refrigerating machine extends into the vacuum chamber, and the refrigerating machine is connected with the helium compressor; the adjusting assembly is arranged in the vacuum chamber, the heat insulation part is arranged on the adjusting assembly, the heating part is arranged on the heat insulation part and fixedly connected with the activated carbon adsorption trap, the activated carbon adsorption trap is arranged opposite to a cold head of the refrigerator, and the adjusting assembly drives the activated carbon adsorption trap to be attached to or separated from the cold head of the refrigerator; the vacuum pump is communicated with the vacuum chamber. The high and low temperature control device is simple in structure, and high and low temperature control in the krypton-85 temperature swing adsorption separation process can be rapidly and effectively achieved.

The utility model discloses a krypton xenon raw material liquid oxygen storage device which comprises an outer tank, a tank cover, an inner tank and a first damping mechanism, an air outlet pipe is fixedly arranged on the tank cover, the first damping mechanism comprises two fixing blocks, two sliding blocks, two first springs and a fixing plate, the two fixing blocks are fixedly arranged on the inner bottom face of the outer tank, and the two sliding blocks are fixedly arranged on the inner bottom face of the inner tank. The two sliding blocks are connected into the corresponding fixing blocks in a sliding mode, the two first springs are arranged in the corresponding fixing blocks, the two ends of each first spring are fixed to the corresponding fixing block and the corresponding sliding block respectively, two first mounting plates are fixedly arranged on the bottom face of the fixing plate, a first rotating shaft is fixedly arranged between the two first mounting plates, and two second mounting plates are fixedly arranged on the two sliding blocks respectively. A second rotating shaft is fixedly arranged between the two second mounting plates, and connecting rods are fixedly arranged between the first rotating shaft and the second rotating shaft located on the same side. The utility model is used for solving the technical problem that the follow-up operation is influenced by explosion in the conveying process.

Heavy inert gas insulation layers are provided for one or more components of a launch system for a plurality of missiles. The layer may be integrated into the walls of the components or provided in inserts attached to the components. An inert gas fills a sealed void space in the walls or the insert. The inert gas has a density of at least 1.5 Kg / m3 and a thermal conductivity (Tcond_gas) of no greater than two-thirds of a thermal conductivity of air (Tcond_air) to form the heavy inert gas insulation layer. The inert gas may be Argon, Krypton, Xenon or a synthetic gas and is suitably held at a pressure of 760 Torr (1 atmosphere) or greater at sea level. The heavy inert gas insulation layer delays desensitization or inhibits premature reaction of the energetic materials inside the missiles due to high external temperatures. The insulation layers allow for more compact and dense configurations of the launch system and missiles.

The utility model belongs to the technical field of air separation, and particularly discloses an internal compression air separation poor krypton xenon extraction device and a start-stop control system, which comprise a lower tower, a main cooler, an upper tower, a gas-liquid separator, a liquid oxygen evaporator, a liquid oxygen adsorber, a liquid oxygen pump and a liquid jet evaporator, all the devices are communicated through pipelines, liquid oxygen is buffered through the gas-liquid separator before entering the liquid oxygen pump, the capacity of rapidly switching two working conditions of producing poor krypton xenon and not producing poor krypton xenon is achieved, and due to the fact that the gas-liquid separator does not participate in heat exchange and rectification, potential safety hazards do not exist in the change of the liquid level of the gas-liquid separator. Therefore, the safety of rapid working condition switching equipment can be guaranteed, and stable working condition operation of the main tower is guaranteed.

The utility model relates to the technical field of vaporizers, in particular to an air temperature type vaporizer for krypton xenon production, which comprises a heating box arranged at the top of a box body, the top of the heating box is provided with an opening, a heating sheet is arranged in the heating box, and an exhaust fan is arranged in the heating box below the heating sheet; the main pipe is vertically arranged in the box body, the upper end of the main pipe penetrates through the top of the box body and then is communicated with a connecting pipe on the heating box below the exhaust fan through a rotating joint, and the main pipe swings under the driving of a swinging assembly; the two air spraying pipes are oppositely arranged above and below the finned tube in the box body in parallel, the ends of the two air spraying pipes are communicated with the main pipe, and a plurality of air spraying heads are arranged on the sides, facing the finned tube, of the two air spraying pipes. The utility model has the advantages of keeping vaporizing capability and the like.

The utility model relates to a krypton and xenon content detection device for external poor krypton and xenon liquid oxygen. Comprising a tank car used for filling poor krypton-xenon liquid oxygen, a filling port of the tank car is connected with a pressure stabilizing unit used for keeping the internal pressure of the tank car stable, and an outlet of the tank car is connected with a krypton-xenon content detection unit through a dehydration vaporization unit. The tank car has the advantages of being simple in structure, reasonable in design and capable of adjusting the pressure in the tank car so as to achieve convenient gasification, meanwhile, by arranging the dehydration vaporization unit, the purpose of dehydrating while gasifying liquid oxygen can be achieved, further, the arrangement can provide buffering for the krypton and xenon content detection unit, and the detection accuracy is improved. The detection unit is prevented from being scoured by overlarge gas phase pressure, so that the service life of the krypton and xenon content detection unit is prolonged.

The utility model relates to the technical field of krypton-xenon rectifying equipment, in particular to an evaporator direct connection structure of a krypton-xenon rectifying tower, which comprises a cold box and a first sealing plate, the front side of the cold box is detachably connected with the first sealing plate, the lower side in the cold box is fixedly connected with a fixed disc, and the front side of the fixed disc is clamped with a limiting baffle. The upper side of the fixing disc is fixedly connected with a partition plate, the lower side of the fixing disc is fixedly connected with an exhaust pipe, the front side of the limiting baffle is fixedly connected with two transmission plates, the front sides of the transmission plates are fixedly connected with a first sealing plate, and the upper side of the fixing disc is fixedly connected with a tower body. According to the device, the bottom of the tower body can be divided into an independent space for installing the evaporator through the partition plate, the tower body and the evaporator are installed in the cold box together, the conveying pipe and the exhaust pipe serve as connecting pipelines between the tower body and the evaporator and are fixed in the cold box together, the connecting pipelines do not need to be independently provided with a heat preservation structure, the structure is simple, and cost is low. And the heat preservation effect is good.

The invention provides a safe recovery assembly for high-purity liquid oxygen in krypton-xenon gas production, and relates to the field of air separation. The safe recovery assembly for high-purity liquid oxygen in krypton-xenon gas production comprises a first-stage concentration tower, a second-stage concentration tower and a recovery tank, the second-stage concentration tower is arranged on one side of the first-stage concentration tower, a first circulating pipe is fixedly connected between the first-stage concentration tower and the second-stage concentration tower, and a second circulating pipe is fixedly connected between the first-stage concentration tower and the second-stage concentration tower. The top end of the second-stage concentration tower and the bottom end of the rear side of the first-stage concentration tower are fixedly connected with return pipes, the interiors of the first-stage concentration tower and the second-stage concentration tower are fixedly connected with reinforcing inner frames, and the interiors of the reinforcing inner frames are provided with low-temperature-resistant stainless steel liners. The detachable structure is arranged at the top of the concentration tower, later maintenance, overhaul and cleaning operation can be facilitated, the use safety is improved by arranging the reinforcing inner frame and the low-temperature-resistant stainless steel inner container in the concentration tower, and the safety protection effect on equipment is achieved.

The application discloses a kind of intelligent poor krypton-xenon product extraction device, including air separation tower, the air separation tower includes multiple cryogenic tubes, the connecting place between two the cryogenic tubes of intercommunication is connected by two flanges, it is characterized in that, still including two sealing bodies between two the flanges, one of the sealing bodies sliding sleeve is connected on another sealing body, pressure compensation component is connected between two the sealing bodies, it is used to extrude two the sealing bodies to carry out elastic compensation outside;The application provides a kind of intelligent poor krypton-xenon product extraction device, in normal sealing state, one of the sealing bodies sliding sleeve is connected on another sealing body, and there is the tendency of movement outside between them by pressure compensation component, when the gap between sealing body and flange surface appears due to aging, thermal expansion and contraction and the like, two sealing bodies are pushed outside by pressure compensation component to realize resealing.

The invention discloses a liquid sampling device and an analysis device.The liquid sampling device comprises a vacuum tube, a liquid discharging tube and a material taking tube, the vacuum tube is provided with a containing space and a first opening communicated with the containing space, and the vacuum tube has a cold insulation effect; the liquid discharge pipe is positioned in the accommodating space, is provided with a second opening and is used for placing a to-be-taken sample; the material taking pipe comprises a first end and a second end which are oppositely arranged, and the first end is used for being inserted into the liquid discharging pipe through the first opening and the second opening in sequence so as to extract a to-be-taken sample in the liquid discharging pipe; the first end of the material taking pipe is provided with a tip structure. The first end of the material taking pipe is provided with the tip structure, so that a needed sample can be conveniently taken out from the liquid discharging pipe, and the effect that the taken sample is real-time, real and accurate is achieved. In one embodiment, the sample includes cryogenic liquid xenon-krypton.

This invention provides an online monitoring system and method for krypton-85 based on a scintillation fiber bundle, specifically relating to the field of nuclear radiation monitoring. The online monitoring system includes: a gas pretreatment unit, a detection unit, an electronics and data acquisition unit, and a control unit. The detection unit is connected to the gas output terminal of the gas pretreatment unit. The detection unit includes a detection chamber, a scintillation fiber bundle, a first photomultiplier tube, a second photomultiplier tube, and a lead shield. The scintillation fiber bundle is disposed within the detection chamber, and the first and second photomultiplier tubes are respectively located at both ends of the detection chamber, with their photosensitive surfaces optically coupled to both ends of the scintillation fiber bundle. The lead shield covers the outside of the detection chamber. The electronics and data acquisition unit receives the output signal from the detection unit, and the control unit controls the automatic operation of the entire system, parameter setting, and data acquisition and processing. This invention solves the problems of poor timeliness and insufficient representativeness in traditional offline monitoring methods.

The invention discloses an application of a pure silicon molecular sieve in efficient trapping of trace krypton gas under a humid condition, the ZSM-11 pure silicon molecular sieve with MEL configuration is used as an adsorbent, efficient trapping of trace krypton gas in air is realized under a high-humidity environment, the molecular sieve has obvious Kr / N2 selectivity, and the molecular sieve can be used as an adsorbent for efficient trapping of trace krypton gas. The molecular sieve can effectively trap and separate 500 ppm krypton gas in air in a dynamic penetration experiment, and still can keep excellent separation performance even under the condition that the relative humidity reaches up to 72.6%, meanwhile, in the desorption process, enriched krypton gas with the concentration reaching up to 85% can be obtained through the method, and the method is suitable for industrial production. The method is suitable for the fields of nuclear facility waste gas treatment, radioactive gas monitoring and nuclear emergency response.

The utility model relates to a methane detection device used in a krypton-xenon-containing liquid oxygen production system. Comprising a de-heavy rectifying tower in a liquid oxygen production system, a reboiler connected with a heat source nitrogen pipeline is arranged in the de-heavy rectifying tower, a detection pipeline and a tower kettle liquid discharge pipeline are arranged at the bottom of the de-heavy rectifying tower, and the tower kettle liquid discharge pipeline is connected with a krypton-xenon concentrate storage tank of a subsequent working section. The detection pipeline is connected with the methane detection unit through the gasification uniform mixing unit; the device has the characteristics that the content of methane in the tower kettle liquid in the de-heavy rectifying tower can be monitored in real time, so that the de-heavy rectifying tower can stably run for a long time under the condition that the risk is reduced.