77 results about "Cryo-adsorption" patented technology

The utility model discloses a low-temperature adsorption pump and a low-temperature adsorption array suitable for a fusion reactor. The low-temperature adsorption pump comprises a heat shielding baffle, a supercritical helium pipeline, a helium low-temperature plate, an adsorption bin, a high heat conduction plate and a gas baffle, the supercritical helium pipeline, the helium low-temperature plate, the adsorption bin, the high-thermal-conductivity plate and the gas baffle are sequentially arranged in the thermal baffle; and the adsorption bin is filled with an adsorbent. The adsorbent contained in the adsorption bin is multiple times that of a low-temperature adsorption plate with the same area, and particularly, the difference is larger when a low-temperature adsorption array is formed. Meanwhile, a single-stage heat shielding baffle can be used, enough high conductance is guaranteed, high pumping speed and large capacity can be achieved, the problem that activated carbon falls off in the operation process of the low-temperature adsorption pump is effectively solved, and the low-temperature adsorption pump can be used in the strong neutron irradiation environment such as a fusion device in the future.

This invention discloses a system and method for extracting helium from natural gas. The system includes an air expander, a cooler, a cold box, and a helium purification system. The cold box includes a main heat exchanger, an air-liquid separator, and an LNG-liquid separator. The helium purification system includes an oxygen-addition and hydrogen-removal reactor, a helium purification system cooler, a helium purifier, a circulating compressor, a booster compressor, and a Dewar flask. The Dewar flask contains a heat exchanger, a gas-liquid separator, and an adsorber. This invention features a reasonable process design, simple equipment, and easy operation, achieving a helium extraction rate of up to 98%. By delivering methane to users in the form of LNG and using low-temperature adsorption to produce pure helium, the economic value of the product is improved.

This invention provides an integrated device and method for gas ultrapurification, comprising: an integrated sealed cavity; an adsorption system disposed inside the integrated sealed cavity, the adsorption system being filled with at least one adsorbent; a temperature control system disposed inside the integrated sealed cavity, including independent refrigerant circulation loops and hot medium circulation loops, for temperature control of the adsorption system; and a gas pipeline system including a raw material inlet, a displacement gas inlet, a product gas outlet, and a desorption gas outlet, each interface being connected to the integrated sealed cavity; the temperature control system controls the temperature of the adsorption system, enabling the sequential execution of a series of processes within the integrated gas ultrapurification device under the condition of an inert gas flow: preheating and activation of the adsorbent, low-temperature adsorption purification of the gas, high-temperature desorption regeneration, and cooling of the adsorbent for later use. The method of this invention is simple, easy to operate, and has broad industrial application prospects.

The invention relates to a hydrocarbon adsorption material in a cold start stage of a diesel vehicle and a preparation method and application of the hydrocarbon adsorption material in the technical field of environmental catalysis and tail gas purification, the adsorption material comprises an active component and a carrier material, the active component is Ag, the carrier material is ZSM-5 zeolite with an MFI topological structure, and the mass fraction of the active component Ag is 2.0 wt%. The carrier ZSM-5 is loaded with Ag species through a two-step ion exchange method, ammonium salt pretreatment and silver ion exchange are included, and after centrifugation, drying and air atmosphere calcination, the high-performance material for hydrocarbon adsorption in the cold start stage of the diesel vehicle is finally prepared. The prepared adsorption material has the advantages of being high in silver species dispersity, large in low-temperature adsorption capacity and good in matching of a high-temperature desorption window and DOC activation temperature, compared with traditional silver modified zeolite, the adsorption capacity is increased by 125.7% and 79.6% respectively, desorption peaks are concentrated and matched in temperature, the HCs rejection rate in the cold start-up stage is larger than or equal to 90%, and the adsorption material has the remarkable application value and is suitable for popularization and application. And upgrading and optimization of a diesel vehicle tail gas purification technology can be promoted.

The invention discloses a system and a method for purifying helium from multi-component mixed gas containing helium, and belongs to the technical field of gas purification. The system comprises a low-temperature cooling unit, a low-temperature adsorption unit and a helium product storage tank which are communicated in sequence, the low-temperature cooling unit comprises a feeding system, a low-temperature Dewar flask I and a gas-liquid separator; the gas-liquid separator is arranged in the low-temperature Dewar flask I; the low-temperature adsorption unit comprises a low-temperature Dewar flask II and an adsorption column; the adsorption column is arranged in the low-temperature Dewar flask II; multi-component mixed gas containing helium enters the gas-liquid separator through the feeding system to be separated, separated coarse helium enters the adsorption column through a pipeline, and a helium product adsorbed and separated by the adsorption column enters the helium product storage tank. The purification method adopting the system is simple and efficient, and does not need a catalytic dehydrogenation process. High-purity helium or ultra-pure helium with the purity larger than 99.999% can be obtained through one-time low-temperature condensation separation and one-time low-temperature adsorption separation.

The invention discloses a helium purification method capable of preventing catalyst poisoning, which comprises the following steps: cooling raw material gas until miscellaneous gas with liquefaction temperature equal to or higher than that of nitrogen in the raw material gas is liquefied, carrying out gas-liquid separation to obtain intermediate product gas containing neon gas, hydrogen gas and helium gas, and adsorbing the neon gas in the intermediate product gas at low temperature to obtain mixed gas, the miscellaneous gas contains nitrogen; hydrogen in the mixed gas is removed through a catalyst, so that a helium product is obtained, and at least one first type of gas capable of poisoning the catalyst exists in the offensive gas. The explosion risk can be eliminated, external gas is not needed, the process is simplified, and safety is improved. The temperature optimization catalytic reaction can improve the hydrogen removal rate and prolong the service life of the catalyst, the extraction of byproducts of high-purity hydrogen and neon can increase the resource utilization rate, and the limitation of the traditional process is broken through.

The utility model relates to an adsorption type cold trap which comprises a shell, a cooling inner container and a first net plate, an air inlet is formed in the lower portion of the shell, an air outlet is formed in the upper portion of the shell, the cooling inner container is located in the shell and fixedly connected with the shell, a cooling cavity is formed in the cooling inner container and communicated with a liquid inlet and a liquid outlet respectively, and the first net plate is arranged in the cooling inner container. The first screen plate is located in the shell and fixed to the shell in position, and the first screen plate is located above the cooling inner container. Waste gas is subjected to low-temperature adsorption and adsorption particle adsorption twice, so that the dust content in the waste gas is greatly reduced, dust deposited on the inner wall of a pipeline is reduced, and the pipeline between a dry pump and waste gas treatment equipment is prevented from being blocked; the detection medicament in the net cylinder is observed through the transparent lens to judge whether the adsorption particles need to be replaced, and the operation is simple and convenient; and the mounting cylinder sleeves the outer side of the cooling liner, and the mounting cylinder can be integrally taken out of the shell to be cleaned, so that the cleaning is more convenient, and meanwhile, the cleaning effect is improved.

The invention relates to the technical field of ultralow-temperature hydrogen purification, in particular to an ultralow-temperature hydrogen purification system. Which comprises a deoxidation barrel, two low-temperature adsorption towers, a multi-stage heat exchange structure, a raw material gas inlet, a control system and a temperature control module, and is characterized in that the raw material gas inlet is sequentially connected with the deoxidation barrel and the two low-temperature adsorption towers which are arranged in parallel through pipelines, and the deoxidation barrel is filled with a metal filler which is used for carrying out a chemical reaction with oxygen so as to realize primary removal; the two low-temperature adsorption towers are in a double-layer cavity structure, and a liquid nitrogen inlet and a liquid nitrogen outlet are formed in outer-layer cavities of the two low-temperature adsorption towers. By means of comprehensive innovation on the system structure and the operation method, the system has the remarkable beneficial effects that the purification mode that the deoxidizing barrel and the double-tower parallel low-temperature adsorption structure are combined is adopted; impurities such as oxygen, nitrogen, carbon monoxide and methane in the hydrogen can be efficiently removed, and the purity of the hydrogen can stably reach 99.9999999% or above.

The utility model provides a kind of petrochemical cracking device chlorine-containing waste gas low-temperature adsorption recovery device, it is related to chlorine-containing waste gas recovery technical field, including absorption cylinder and washing tank, the bottom of absorption cylinder is provided with base, and the middle part of base is provided with liquid accumulation drain pipe, the lower end of liquid accumulation drain pipe is led into washing tank, and the middle part in washing tank is provided with filter screen frame, washing tank is equipped with lye, and the left part of washing tank is provided with waste gas inlet pipe, the upper portion of waste gas inlet pipe is connected with return pipe, return pipe is installed with suction pump in the upper portion, and the upper end of return pipe is connected on the left side surface upper portion of absorption cylinder, dehumidifier is installed in the lower part in absorption cylinder.The utility model first carries out lye washing to chlorine-containing waste gas, then in turn carries out dehumidification, drying, adsorption and purification treatment, and the gas after treatment can be recycled, which helps to improve the absorption rate of chlorine gas, so that the gas after treatment is cleaner and more complete, and the discharge is safe, reliable and environmentally friendly.

The invention relates to the technical field of helium production, and provides a wide-abundance-range helium-3 purification adsorption device and portable adsorption equipment. The low-temperature adsorption unit comprises a vacuum cover; a refrigerator; the plurality of adsorption devices are arranged in the vacuum cover, and each adsorption device is filled with different types of adsorbents and is used for selectively adsorbing helium-3 raw material gases in different preset abundance ranges; the air inlet end of each adsorption device is connected to the air supply pipeline through an air inlet pipeline, and each air inlet pipeline is provided with an air inlet valve; the gas analyzer is arranged on the gas supply pipeline and is used for detecting the abundance of helium-3 in the detection raw material gas so as to selectively open the gas inlet valves of the helium-3 adsorption devices corresponding to different abundance ranges according to a detection result; the corresponding adsorption devices are matched according to different abundance values of helium-3 in the mixed raw material gas, effective recovery and purification of the helium-3 raw material gas with a wide abundance range are achieved, the application range of the raw material gas is widened, loss of helium-3 resources is effectively reduced, and the universality of the device is remarkably improved.

The present application relates to the technical field of flue gas purification and discloses a flue gas low-temperature adsorption regeneration purification system, which comprises a spray cooling tower, an adsorption tower, a first heat exchanger, a regeneration tower and a cold energy recovery assembly. The spray cooling tower is used for cooling flue gas into low-temperature flue gas with subzero temperature. The adsorption tower is used for adsorbing and purifying the low-temperature flue gas discharged from the spray cooling tower into clean flue gas. The first heat exchanger is used for exchanging heat between the clean flue gas discharged from a flue outlet and a first medium introduced into a first hot side inlet. The regeneration section of the regeneration tower is used for heating adsorbents to regenerate the adsorbents. The cooling section is used for cooling the regenerated adsorbents. The cold energy recovery assembly is used for recovering cold energy in the clean flue gas discharged from the adsorption tower and / or cold energy in the clean flue gas discharged from a first cold side outlet. The flue gas low-temperature adsorption regeneration purification system can recover and utilize the cold energy in the flue gas multiple times, thereby reducing the consumption of other energy.

An efficient low-temperature adsorbent vacuum breaking device comprises an outer shell and an inner container arranged in the outer shell, a vacuum heat insulation gap is reserved between the inner container and the outer shell, a low-temperature adsorbent chamber is inserted in the inner container, one end of the low-temperature adsorbent chamber is arranged in the inner container, and the other end of the low-temperature adsorbent chamber is arranged in the inner container. The other end of the low-temperature adsorbent chamber is arranged in the vacuum heat insulation gap, an opening is formed in the end, at the vacuum heat insulation gap, of the low-temperature adsorbent chamber, the opening is sealed through a sealing cover, an adsorption opening is formed in the sealing cover and sealed through a thin aluminum plate, and an air inlet pipe is further inserted into the sealing cover. And a low-temperature adsorbent is filled in the low-temperature adsorbent chamber. The low-temperature adsorbent can be put into the interlayer in advance, the tank body is prevented from being subjected to trepanning operation again in the later period, meanwhile, the activation degree of the low-temperature adsorbent material is guaranteed to the maximum degree, and the low-temperature adsorbent material can be activated again and replaced conveniently in the later period.

The invention discloses an energy-saving air compression treatment device for dialyzer drying and a treatment process of the energy-saving air compression treatment device. The device comprises an air compressor, a water cooler connected with the air compressor, a rotary drum dryer connected with the air compressor, a peristaltic pump connected with the rotary drum dryer and a secondary filter connected with the rotary drum dryer. A rotary drum in the rotary drum dryer comprises a low-temperature adsorption unit, a high-temperature desorption unit and a cooling regeneration unit, and the rotary drum is connected with a motor to control the rotary drum to keep rotating. The novel treatment device has the beneficial effects that the novel treatment device is used, pressure swing adsorption is replaced by temperature swing adsorption, heat generated in the compression process of compressed air is used as a heat source, and zero loss of the compressed air can be realized; similarly, the heat source is used for heating the supplied air, so that the air can be preheated to 60-70 DEG C, and a large amount of heating electricity is saved; and circulating water is used for replacing a freezing dryer in the cooling process of compressed air, so that power consumption is effectively reduced.

Systems and methods for improving the performance of dilution refrigeration systems are described. Filters and traps employed in the helium circuit of a dilution refrigerator may be modified to improve performance. Some traps may be designed to harness cryocondensation as opposed to cryoadsorption. A cryocondensation trap employs a cryocondensation surface having a high thermal conductivity and a high specific heat with a binding energy that preferably matches at least one contaminant but does not match helium. Multiple traps may be coupled in series in the helium circuit, with each trap designed to trap a specific contaminant or set of contaminants. Both cryocondensation and cryoadsorption may be exploited among multiple traps.

The present application relates to the technical field of flue gas treatment and discloses a flue gas low-temperature adsorption system, which comprises a spray tower and an adsorption tower connected with each other, the spray tower has multiple-stage spray cavities, and spray assemblies are correspondingly arranged in the spray cavities, the spray assemblies are used for spraying spray liquid to cool and lower the temperature of flue gas in the spray cavities, and the flue gas is conveyed to the adsorption tower after being lowered to below room temperature in the spray tower, thereby avoiding the problem that water in the flue gas condenses into ice and causes the blockage of a conveying pipeline. The adsorption tower has an adsorption cavity and a heat exchange cavity, the adsorption cavity has an adsorbent therein, and the heat exchange cavity is used for continuously feeding cooling liquid, so as to simultaneously cool flue gas and adsorb the adsorbent, the adsorption and purification of the flue gas are performed in a subzero temperature zone, the adsorption capacity of the adsorbent is increased, the loading amount of the adsorbent in the adsorption tower is reduced, and the volume of the adsorption tower is reduced. Moreover, the cooling liquid after heat exchange is supplied to any stage of the spray assemblies as the spray liquid sprayed by the spray assemblies, the staged utilization of cold energy is realized, and the energy consumption is reduced.

The application provides a heat pipe structure based on solar heat chemical adsorption refrigeration and a permafrost protection method, and the heat pipe structure comprises a heat pipe, the heat pipe is in a U-shaped hollow structure sealed internally, and a refrigeration working medium is arranged in the heat pipe; the heat pipe comprises a high-temperature adsorption bed, a condensation section, an evaporation section and a low-temperature adsorption bed which are sequentially connected; the high-temperature adsorption bed is internally filled with a high-temperature adsorbent and is used for desorbing the refrigeration working medium under the heating action of solar energy to obtain high-temperature refrigeration working medium; the condensation section is vertically arranged and is used for condensing the high-temperature refrigeration working medium to obtain condensed refrigeration working medium and enabling the condensed refrigeration working medium to enter the evaporation section under the action of gravity; the evaporation section is horizontally arranged and is used for evaporating the condensed refrigeration working medium under the heating action of permafrost temperature and the adsorption action of the low-temperature adsorbent to obtain evaporated refrigeration working medium; and the low-temperature adsorption bed is internally filled with a low-temperature adsorbent and is used for adsorbing the evaporated refrigeration working medium. The scheme improves the permafrost temperature-lowering effect of the heat pipe and the thermal stability of the heat pipe.

The application discloses a raw material gas condensing separation device with cold energy recovery and a use method thereof, which comprises a shell, wherein the shell is a barrel-shaped structure with an arc-shaped bottom surface, a low-temperature liquid inlet and outlet are arranged at the center of the bottom of the shell, a gas discharge port is arranged at the center of the upper cover of the top of the shell, the upper cover of the shell is further provided with a low-temperature gas inlet, a low-pressure adjusting valve, a low-temperature gas outlet, a raw material gas inlet, a normal-temperature ultra-pure gas outlet, a low-temperature ultra-pure gas inlet, a low-temperature pure gas outlet, a high-pressure adjusting valve, and the device is more compact in structure, higher in heat transfer efficiency and safer in operation, the method is simple and applicable, and the application range is wider; since the adsorber is separated, the adsorber equipment is smaller and more compact, the consumption of regeneration gas and liquid nitrogen is reduced, and the product yield is improved; the gas phase recovery after two-stage throttling improves the product yield; the cold energy of the ultra-pure gas and the cold energy of the low-temperature liquid evaporated during subsequent low-temperature adsorption are fully recovered, and the energy consumption is saved.

The present application belongs to the technical field of vehicle control, and discloses a vehicle control method, device, equipment and storage medium. When a pre-start signal is detected and the vehicle meets a cold start determination condition, a first valve is opened, a second valve is closed, and a pre-heating device is controlled to start to pre-heat a catalyst. When the pre-heating is completed, the first valve and the pre-heating device are closed, the second valve is opened, and the engine of the vehicle is controlled to cold start. During the pre-heating stage, the low-temperature adsorption unit is prevented from being heated simultaneously by adjusting the valves, so that the catalyst has good catalytic effect after the pre-heating is completed, and the low-temperature adsorption unit still has pollutant adsorption effect, thereby ensuring that the pollutant emission amount is greatly reduced even if the engine cold starts.

The application discloses a kind of cryogenic adsorption devices and its adsorption regeneration method, it is characterized in that, including cover 1, shell 2, upper envelope 3, low temperature adsorber 4, space I between shell and inner part, special channel II, special channel II's outer cylinder body 5, lower envelope 6, raw gas inlet pipeline 7, support plate 8, outer regeneration gas inlet pipeline 9, ultra-pure product outlet pipeline 10, specific outer regeneration channel. By cryogenic adsorption device can produce 6N level and above ultra-pure product;Device structure is simple, compact, save outer regeneration gas and precooling low temperature liquid consumption;Greatly improve the heat utilization rate of outer regeneration gas, reduce the use amount of ultra-pure product during regeneration, improve the yield of ultra-pure product, especially suitable in large-scale purification device;Simultaneously using different temperature low temperature gas gradually precooling low temperature adsorber, effectively reduce the stress generated by alternating load, control stress in allowable range, ensure the safe operation of equipment.

The application discloses a low-temperature dehumidification drying equipment driven by a heat pump and a heat chemical energy storage and a control method thereof. The core of the low-temperature dehumidification drying equipment driven by the heat pump and the heat chemical energy storage is a deep cooperative coupling system composed of a cascade high-temperature heat pump, an integrated double-function reactor and a drying chamber. The reactor is internally provided with a heat chemical adsorption composite heat storage material and a stirring assembly. The energy storage regeneration and the drying energy release double modes are completely isolated and switched through a gas path switching unit, so that the reactor is compatible with the high-temperature dehydration regeneration and the low-temperature adsorption dehumidification and temperature rising double working conditions in the same cavity, and becomes a core unit for synchronously completing air dehumidification and temperature rising in a closed drying cycle. The application creatively utilizes the high-temperature heat pump coupling heat chemical heat storage technology. Compared with other heat storage technologies, the technology can realize efficient energy storage through peak shifting, significantly reduces energy consumption, greatly improves energy utilization efficiency, saves operation cost by more than 65%, increases the drying rate by more than 40%, and effectively overcomes the defects of the existing drying equipment, such as high energy consumption, asynchronous dehumidification and temperature rising, no energy storage function, high operation cost and insufficient drying quality stability.

The application discloses an adsorbent regenerator and a low-temperature adsorption regeneration system. The adsorbent regenerator comprises a tower body, a material falling assembly and a baffle assembly. The inner cavity of the tower body comprises a distribution section and a heating section below the distribution section. The distribution section is located at the top of the inner cavity of the tower body. The heating section is used for heating the adsorbent to desorb and regenerate the adsorbent. The material falling assembly comprises a plurality of material falling pipes. The material falling assembly is arranged in the heating section. The adsorbent entering the heating section from the distribution section falls through the material falling pipes. The baffle assembly is arranged in the heating section and comprises a plurality of baffles. The baffles are arranged obliquely relative to the axial direction of the material falling pipes. The plurality of baffles are arranged in the heating section at intervals. The baffles are used for guiding the flow of the heating medium in the heating section to heat the adsorbent in the material falling pipes in the heating section to desorb and regenerate the adsorbent. The adsorbent regenerator disclosed by the application can reduce the flow resistance of the heat exchange medium and reduce the flow dead zone area.

The utility model relates to the technical field of hydrogen production, storage and transportation, in particular to a low-temperature adsorption type hydrogen production and storage and transportation system. The system comprises a liquefied natural gas storage tank, a cold energy recoverer, a heater, a methane cracking furnace, a separator, a desorbed gas compressor, a hydrogen compressor, a low-temperature adsorption tank and a low-temperature adsorption type gas cylinder, and the liquefied natural gas storage tank, the cold energy recoverer, the heater and the methane cracking furnace are sequentially communicated through pipelines. The outlet end of the methane cracking furnace is connected to the inlet of the heater through a pipeline, the outlet of the heater is connected with the separator through a pipeline, and the outlet of the separator is respectively connected to the cold energy recoverer and the pipeline between the cold energy recoverer and the heater through two pipelines. Through cooperation of the cold energy recoverer, the heater, the methane cracking furnace, the separator, the desorbed gas compressor, the hydrogen compressor, the low-temperature adsorption tank and the low-temperature adsorption type gas cylinder, efficient production and high-density storage and transportation of hydrogen are realized by taking natural gas as a raw material.

The utility model relates to the technical field of carbon dioxide preparation, and provides a dehumidification system for carbon dioxide preparation, the dehumidification system is arranged between a three-stage compressor and a rectifying tower and is used for removing moisture in compressed carbon dioxide gas, and an outlet of the three-stage compressor is used for being connected with a tubular heat exchanger. The tubular heat exchanger comprises a first outlet for outputting low-temperature gas to the regeneration adsorption tower A, a second outlet for outputting separated water, and a third outlet connected with the low-temperature adsorption tower B; a gas outlet pipe of the regeneration adsorption tower A is communicated with the tubular heat exchanger through a return pipe; a waste heat pipeline of the three-stage compressor is connected with a regeneration auxiliary heating pipe of the regeneration adsorption tower A; a membrane separation assembly is arranged outside a gas outlet of the low-temperature adsorption tower B, and a gas outlet pipe of the membrane separation assembly is used for being connected with the rectifying tower. According to the utility model, the dehumidification effect of compressed carbon dioxide gas is improved; meanwhile, the utilization rate of energy in the system is increased, and the energy consumption of the system is reduced.

A CO2 capture device is disclosed. The CO2 capture device comprises: a control valve for distributing the flow rate of exhaust gas; a first line that captures CO2 using a low-temperature adsorbent when exhaust gas is introduced; a heat exchanger installed upstream of the first line to maintain the introduced exhaust gas at a preset temperature; a second line that captures CO2 using a medium-temperature adsorbent when exhaust gas is introduced; a bypass line that passes the exhaust gas without capturing CO2 when exhaust gas is introduced; a sensor unit for sensing the flow rate and temperature of the exhaust gas of each of the first line and the second line; and a processor that controls the control valve based on the flow rate and temperature of the exhaust gas of each of the first line and the second line sensed through the sensor unit to distribute the flow rate of the exhaust gas to at least one of the first line, the second line, and the bypass line. Accordingly, by using low-temperature and medium-temperature adsorbents in the CO2 capture device to appropriately distribute the flow rate and temperature of the incoming exhaust gas, CO2 capture is operated more efficiently, and by controlling the exhaust gas temperature according to the performance characteristics of the adsorbent, the efficiency of the adsorbent is maximized, thereby increasing CO2 capture efficiency and enhancing durability.

The utility model discloses a helium purification system, which belongs to the technical field of helium purification, and comprises a dehydrogenation unit, a purification unit and a control unit, and is characterized in that the dehydrogenation unit is used for dehydrogenating crude helium conveyed from a substation; the drying unit is used for dehydrating the dehydrogenated crude helium; the PSA unit is used for performing pressure swing adsorption on the dried crude helium to remove foreign gases except helium; the low-temperature purification unit is used for carrying out trace impurity adsorption on the helium subjected to impurity removal; according to hydrogen contained in raw material gas, hydrogen in crude helium is converted into water through the dehydrogenation unit, then the water is absorbed through the drying unit, so that hydrogen removal is achieved, the dehydrogenated and dried crude helium enters the PSA unit, other impurity gases except the helium are removed in a pressure swing adsorption mode, and the hydrogen in the crude helium is removed. Then the helium treated by the PSA unit enters a low-temperature adsorption purification unit, all trace impurities except the helium are adsorbed, and a helium product with the concentration larger than or equal to 99.999% (Vol) is obtained.

The invention discloses a low-temperature adsorption device capable of quickly replacing an adsorption material, and relates to the technical field of low-temperature adsorption, the low-temperature adsorption device comprises a supporting base, an equipment connecting sleeve is arranged on the upper surface of the supporting base, a pre-cooling heat exchange unit is arranged in the supporting base, a vacuum cover is arranged above the equipment connecting sleeve, and the vacuum cover is connected with the equipment connecting sleeve. A primary cold shield is arranged in the vacuum cover, an air inlet pre-cooling pipeline is arranged in the middle of the pre-cooling heat exchange unit, a secondary cold shield is arranged at the upper end of the pre-cooling heat exchange unit, an adsorption reaction box body is arranged at the upper end of the pre-cooling heat exchange unit, and a secondary cold shield is arranged at the lower end of the adsorption reaction box body. A temperature control unit is arranged between the lower end of the adsorption reaction box body and the upper end of the pre-cooling heat exchange unit, the adsorption reaction box body and the adsorption material unit are modularized and can be quickly replaced in configuration, efficient replacement of an adsorbent is realized, cold loss is effectively inhibited, and the flexibility and efficiency of an isotope separation experiment are remarkably improved; the controllability and repeatability of the separation process are improved.

The present application belongs to the technical field of gas separation and purification, and relates to a device system and a method for separating and extracting high-purity xenon and high-purity krypton. The device system and the method utilize low-temperature adsorption separation technology and low-temperature rectification purification technology, integrate the energy level matching and the transmission and utilization of heat and cold, realize the efficient separation and concentration extraction of xenon and krypton components, recycle high-value and high-content xenon adsorbed by a low-temperature adsorber, and greatly improve the resource recovery rate of xenon.

The present application relates to a kind of equipment and process for obtaining high-purity helium directly from natural gas, and the equipment for obtaining high-purity helium directly from natural gas includes precision oil filter, membrane separation system, acid gas removal unit, fine desulfurization unit, dehydrogenation unit, re-purification system and low-temperature impurity removal unit.The present application is mainly used to solve the helium purification in helium-poor, ultra-lean helium natural gas according to the current situation of domestic resources, and adopts multi-stage membrane separation + low-temperature adsorption process to realize the extraction of helium-poor natural gas and obtain high-purity helium or liquid helium, which can directly extract helium from the purified natural gas of helium-poor, ultra-lean helium gas field (0.03-0.1% He) and purify it into high-purity helium (99.999%);The present application sets up a purification unit before low-temperature purification to completely remove CO2 and H2O, and uses non-permeable tail gas for regeneration, without N2 impurities entering the process gas, by reasonably arranging the positions of COS hydrolysis and dehydrogenation reaction to avoid the "cold and hot disease" problem of process flow, which can completely remove impurities Ar, Ne and the like to effectively ensure the purity of helium.

The invention relates to a device and method for producing high-purity CO2, 13C and 12C through efficient negative-pressure low-temperature rectification, the device uses CO2 as a raw material, high-boiling-point impurities and low-boiling-point impurities in industrial CO2 gas are removed through a liquid nitrogen cold well and a CO2 low-temperature adsorption film, and the device is composed of an industrial CO2 purification system and 13Camp; high-purity CO2 low-temperature rectification air separation pressure nitrogen supply is carried out, and 13Camp is achieved; the system is composed of an industrial CO2 purification system, a high-purity CO2 efficient negative-pressure low-temperature rectification system, a 13C high-precision filling system, a 12C filling system, a high-purity CO2 filling system, an instrument electric control system and a vacuumizing system, wherein the industrial CO2 purification system is connected with the 13Camp through a pipeline; the high-purity CO2 high-efficiency negative-pressure low-temperature rectification system is connected with the industrial CO2 purification system and the 13Camp; a high-purity CO2 low-temperature rectification air separation pressure nitrogen supply system is adopted, and 13 Camp is achieved; and the high-purity CO2 efficient negative-pressure low-temperature rectification system, the 13C high-precision filling system, the 12C filling system and the high-purity CO2 filling system are respectively connected with the instrument electric control system and the vacuumizing system.

The present application relates to flue gas adsorption purification technical field and disclose a kind of adsorbent regenerator with interlayer space and low-temperature adsorption regeneration system, the adsorbent regenerator with interlayer space, including tower barrel and interlayer component, heating cavity and degassing cavity are formed in tower barrel, the suction port that is communicated with degassing cavity is equipped on the lateral wall of tower barrel, adsorbent saturated after being heated by heating cavity enters degassing cavity to desorb out regenerative rich gas, and regenerative rich gas is discharged by suction port, interlayer component is placed in degassing cavity, interlayer component has interlayer space and flow channel, flow channel is used to supply adsorbent from the top of interlayer space to the bottom of interlayer space, interlayer space is communicated with suction port, to make regenerative rich gas be discharged by suction port after interlayer space.This application discloses the adsorbent regenerator with interlayer space, can form interlayer space in degassing cavity, make adsorbent in degassing cavity be uniformly sucked, to improve the suction effect in degassing cavity.