152 results about "Cryo-adsorption" patented technology

The invention relates to the technical field of low-temperature adsorption and isotope separation, in particular to a low-temperature helium isotope adsorption separation system and a low-temperature helium isotope adsorption separation method, and the system comprises a gas distribution and gas recovery module which is used for preparing and mixing helium isotope raw material gas and recovering residual gas after an experiment; the static testing unit is used for testing the performance of the adsorbent under a fixed condition; the dynamic low-temperature adsorption unit is used for helium isotope separation under a continuous flow condition; the low-temperature control module is used for providing a stable low-temperature environment and accurate temperature control; wherein an air inlet pipe and an air outlet pipe of the low-temperature control module are respectively subjected to thermal sedimentation and are respectively connected with a flow controller. According to the scheme, the defects that in the prior art, He resources are seriously short, and existing low-temperature adsorption separation helium isotope examples are few are overcome, reference is provided for low-temperature adsorption separation helium isotope adsorbent screening and system design, development of the He separation and purification technology in China is promoted, and dependence on imported He is reduced.

Provided is a low-temperature adsorption system for flue gas, comprising a spray tower (1) and an adsorption tower (2) which are connected to each other, wherein the spray tower (1) has multiple-stage spray chambers, a spray assembly is correspondingly provided in each spray chamber and is configured to spray a spray liquid so as to cool down flue gas in the spray chamber, and the flue gas is cooled to below room temperature in the spray tower (1), and is then conveyed to the adsorption tower (2), thereby avoiding the problem that a conveying pipeline is blocked because moisture in the flue gas condenses into ice. The adsorption tower has an adsorption chamber (204) and a heat exchange chamber (202), an adsorbent (2042) is provided in the adsorption chamber (204), and the heat exchange chamber (202) is configured to continuously introduce a cooling liquid so as to indirectly cool both the flue gas and the adsorbent (2042), such that adsorption and purification of the flue gas are performed in a subzero-temperature zone, and the cooling liquid after heat exchange is supplied to any one-stage spray assembly as the spray liquid sprayed by the spray assembly.

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.

The invention relates to the technical field of nuclear reactors, and discloses a high-temperature gas cooled reactor helium purification monitoring system and a start-stop and helium purification regeneration judgment method. The high-temperature gas cooled reactor helium purification monitoring system comprises a humidity monitoring module arranged in a high-temperature gas cooled reactor; the first monitoring module is arranged between the dust filter and the copper oxide bed and consists of a first moisture concentration monitoring unit, a first gas tritium concentration monitoring unit and a first liquid tritium concentration monitoring unit; the second monitoring module is arranged between the copper oxide bed and the molecular sieve bed and consists of a second moisture concentration monitoring unit, a second gas tritium concentration monitoring unit and a second liquid tritium concentration monitoring unit; and the third monitoring module is arranged between the molecular sieve bed and the low-temperature adsorber and consists of a third moisture concentration monitoring unit, a third gas tritium concentration monitoring unit and a third liquid tritium concentration monitoring unit. By monitoring the humidity of the high-temperature gas cooled reactor and parameters of all links of the helium purification system, a basis is provided for determining the helium purification regeneration period, and impurities are prevented from exceeding the standard or being excessively regenerated.

The invention relates to a coarse helium purification and liquefaction circulation system and method based on low-temperature rectification, and relates to the technical field of low-temperature refrigeration and the technical field of chemical separation. The system comprises a crude helium liquefying unit, a pure helium circulating liquefying unit and a cooling capacity providing unit. The crude helium liquefying unit comprises a crude helium pipeline, a 77K low-temperature adsorber, a multi-stage turbo expander, a multi-stage heat exchanger, a gas-liquid separator, a 20K adsorber, a throttle valve and a liquid helium tank, and is used for liquefying and purifying crude helium; the pure helium circulating liquefaction unit comprises a pure helium pipeline, a multi-stage turbo expander, a reflux compressor, a throttle valve and the like, and is used for liquefying refluxed pure helium; the heat exchange unit comprises a liquid nitrogen pipeline, a backflow pipeline, a multi-stage heat exchanger and the like and is used for providing cooling capacity. By adopting the technical scheme of purifying and liquefying the crude helium and refluxing and liquefying the pure helium, the crude helium extracted from the natural gas through low-temperature condensation can be purified and then liquefied, the energy consumption is low, the operation temperature is flexible, the recovery rate is high, and the low-temperature rectified crude helium can be directly treated.

The invention provides a crude helium storage and recycling system for a cryogenic helium extraction process and a recycling control method, and relates to the technical field of helium production. The crude helium storage and recycling system for the cryogenic helium extraction process comprises a membrane separation device, a permeable gas supercharging device, a pressure swing adsorption device, a low-temperature adsorption device, a first storage tank group, an unloading device, a second storage tank group, a first detection unit, a second detection unit, a first recycling loop, a second recycling loop, a third recycling loop and a control device. According to the technical scheme, the first detection unit is arranged to monitor the concentration of methane and carbon dioxide in the crude helium at the outlet of the pressure swing adsorption device, high-concentration impurities can be effectively prevented from entering the low-temperature adsorption device, the problem of equipment freezing and blocking caused by condensation is avoided, the crude helium recycling path is dynamically adjusted, and the recycling efficiency of the crude helium is improved. And the gas meeting the standard is sent to the next stage for treatment, so that the helium quality and the production efficiency can be improved in the cryogenic helium extraction process.

The invention relates to an argon recovery and purification method and device, and the purification method comprises the following steps: filtering out solid particles from crude argon recovered by a workbench; moisture, carbon monoxide and carbon dioxide are removed from compressed crude argon; after purification and cooling, nitrogen, oxygen and impurities are removed to obtain high-purity argon, and the high-purity argon is reheated and enters a production line; the purification device comprises a recovery vacuum pump, a crude argon filter, a recovery buffer, a recovery compressor, an outer low-temperature adsorber, a low-temperature cold box, a main heat exchanger and an inner low-temperature adsorber. According to the invention, after crude argon is filtered and compressed to a pressure slightly higher than the pressure required by an argon using process, impurities are removed through two-step adsorption and catalytic reaction of the outer low-temperature adsorber and the inner low-temperature adsorber in the low-temperature cold box, and then purified high-purity argon is introduced into a production line through reheating of the main heat exchanger; the whole technological process has no throttling and pressure reducing technological requirements, and the pressure difference between the product argon and the exhaust pressure of the compressor is small, so that the energy loss and the production cost are effectively reduced.

The invention relates to the technical field of helium extraction, in particular to a high-purity helium extraction method based on low-temperature adsorption. The method comprises the following steps: in a low-temperature environment, carrying out adsorption treatment on mixed gas by utilizing a low-temperature adsorption material through a dynamic adsorption scheduling optimization algorithm to obtain unadsorbed helium and the low-temperature adsorption material after adsorbing impurity gas; carrying out desorption treatment on the low-temperature adsorption material after adsorbing the impurity gas to obtain desorbed enriched helium; and carrying out low-temperature fractionation treatment on desorbed and enriched helium and unadsorbed helium to obtain high-purity helium. The technical problems that a traditional helium extraction method is low in helium extraction efficiency, purity and recovery rate are solved.

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.

A cooling and low-temperature adsorption combined purification device, comprising a tower body (11), the tower body (11) having a gas intake port (101) and a gas discharge port (102). A gas intake chamber (103), a gas passage chamber (104), and an adsorption chamber (105), which are sequentially distributed in the radial direction of the tower body (11) from inside to outside, are provided in the tower body (11). The gas intake chamber (103) is in communication with the gas intake port (101), a cooling assembly for cooling a flue gas is provided in the gas intake chamber (103), an adsorbent is provided in the adsorption chamber (105) for adsorbing and purifying the cooled flue gas into a clean flue gas in a sub-zero temperature zone, and the gas discharge port (102) is configured to discharge the clean flue gas. The gas passage chamber (104) has a cross-sectional area gradually decreasing in the direction from top to bottom.

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 provides a smoke pollutant near-zero-emission full-dry-method treatment system based on ultra-clean electric precipitation. The smoke pollutant near-zero-emission full-dry-method treatment system is composed of a smoke system, an activated carbon system and a desulfurization byproduct preparation system. The flue gas system comprises a flue system, an ultra-clean electric precipitation system, a heat exchange system and a nitrogen oxide circulating system; the activated carbon system comprises a desulfurization and denitrification system, an activated carbon desorption and regeneration system and an activated carbon transportation system. The flue gas is subjected to dust removal, desulfurization, denitration and other processes, so that near-zero emission of pollutants is achieved, and no secondary pollution is generated after the whole flue gas treatment process is finished; the desorbed desulfurization by-product can be prepared into commercial salt or sulfuric acid for sale according to requirements, and the desorbed nitric oxide returns to the hearth to inhibit the generation of new nitric oxide. The system integrates various flue gas pollutant treatment technologies such as ultra-clean electric precipitation, activated carbon low-temperature adsorption desulfurization and denitrification, activated carbon desorption regeneration and nitrogen oxide furnace returning, the flue gas pollutant treatment efficiency is improved, meanwhile, secondary pollutants are thoroughly eliminated, and full-dry-method near-zero emission of flue gas pollutants is achieved.

A low-temperature adsorption and regeneration system, comprising an adsorption tower, a regeneration tower and a regenerated-enriched-gas treatment device (100), wherein the adsorption tower is provided with a flue gas inlet and a clean-flue-gas outlet, and the adsorption tower is internally provided with an adsorbent, which is used for adsorbing flue gas at low temperature and purifying same into low-temperature clean flue gas; the regeneration tower is used for performing regeneration desorption on the adsorption-saturated adsorbent in the adsorption tower, and the regeneration tower is provided with a regenerated-enriched-gas outlet for discharging regenerated enriched gas; and the regenerated-enriched-gas treatment device (100) is in communication with the regenerated-enriched-gas outlet of the regeneration tower and is used for separating water vapor from solid particles in the regenerated enriched gas.

A flue gas cooling and adsorption combined purification tower, comprising a purification tower body (11), the purification tower body (11) having a flue gas inlet (101) and a flue gas outlet (102), and the purification tower body (11) having a cooling chamber (103), an adsorption chamber (104), a flue gas discharge chamber (105) and a transition chamber (106) therein, wherein in the radial direction of the purification tower body (11), the flue gas discharge chamber (105) surrounds the adsorption chamber (104), the adsorption chamber (104) surrounds the transition chamber (106), and the transition chamber (106) surrounds the cooling chamber (103); the cooling chamber (103) is in communication with the flue gas inlet (101), and a cooling device is provided in the cooling chamber (103) and is configured to cool a flue gas to be purified, which is supplied from the flue gas inlet (101) into the cooling chamber (103), to a low-temperature flue gas with a sub-zero temperature; an adsorbent is provided in the adsorption chamber (104) for purifying, by means of low-temperature adsorption, the cooled low-temperature flue gas, which enters the adsorption chamber (104) from the cooling chamber (103), into a clean flue gas; the flue gas discharge chamber (105) is in communication with the flue gas outlet (102), so as to discharge the clean flue gas, which enters the flue gas discharge chamber (105) from the adsorption chamber (104), through the flue gas outlet (102); and the transition chamber (106) is located between the cooling chamber (103) and the adsorption chamber (104), allowing the low-temperature flue gas to enter the transition chamber (106) from the cooling chamber (103) through an inlet of the transition chamber (106), and then enter the adsorption chamber (104) from the transition chamber (106), and the inlet of the transition chamber (106) is away from the flue gas inlet (101) in the axial direction of the purification tower body (11).

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 embodiment of the invention provides a method for deeply removing and purifying halide in flue gas. The method for deeply removing and purifying the halide in the flue gas comprises the following steps: step 1, carrying out dust removal and cooling treatment on the flue gas containing the halide to obtain flue gas A; step 2, feeding the obtained flue gas A into a multi-stage stepped cooling spray tower for cooling treatment to obtain low-temperature flue gas C with the temperature of minus zero; 3, the low-temperature flue gas C is fed into a low-temperature adsorption tower for adsorption treatment, and regenerated gas C containing nitrogen and sulfur is obtained after purification and regeneration. Therefore, the method for deeply removing and purifying the halide in the flue gas has the advantages that the energy consumption is reduced, the adsorption efficiency of the halide in the flue gas is improved, and the construction cost is low.

The invention relates to the technical field of nuclear reactor engineering, and discloses a high-temperature gas cooled reactor liquid nitrogen recycling system and method. The liquid nitrogen recycling system for the high-temperature gas cooled reactor comprises a low-temperature adsorber, a high-temperature gas cooled reactor, a high-temperature gas cooled reactor, a high-temperature gas cooled reactor and a low-temperature gas cooled reactor, the low-temperature adsorber is communicated with an exhaust pipeline, the exhaust pipeline is communicated with the atmosphere, the exhaust pipeline is communicated with a circulation branch, and an inlet and an outlet of the circulation branch are both communicated with the exhaust pipeline; and a heat dissipation mechanism is installed in the main steam pipe valve room, and the heat dissipation mechanism is installed on the circulation branch so that heat exchange can be conducted between air in the main steam pipe valve room and liquid nitrogen in the circulation branch. Volatile low-temperature nitrogen is introduced into the heat dissipation mechanism for heat exchange, reutilization of liquid nitrogen cooling capacity is achieved, cooling capacity resource waste caused by direct emission of the low-temperature nitrogen is reduced, and therefore the system resource utilization rate is increased; and the temperature between the main steam pipe valves is actively reduced through the cooling capacity of the volatilized low-temperature nitrogen, external energy consumption input can be reduced, and the overall energy efficiency of the system is improved.

A low-temperature adsorption-regeneration purification system for flue gas. The system comprises a spray cooling tower (1), an adsorption tower (2), a first heat exchanger (4), a regeneration tower (3) and a cold energy recovery assembly (6), wherein the spray cooling tower (1) is configured to cool flue gas introduced thereinto to low-temperature flue gas at sub-zero temperatures; the adsorption tower (2) is configured to adsorb and purify into clean flue gas the low-temperature flue gas discharged from the spray cooling tower; the first heat exchanger (4) is configured to exchange heat between the clean flue gas discharged through a flue gas outlet (22) and a first medium introduced through a first hot-side inlet (41) in the first heat exchanger (4); a regeneration section of the regeneration tower (3) is configured to heat an adsorbent to regenerate the adsorbent, while a cooling section (33) is configured to cool the regenerated adsorbent; and the cold energy recovery assembly (6) is configured to recover cold energy from the clean flue gas discharged from the adsorption tower (2) and / or cold energy from clean flue gas discharged through a first cold-side outlet (44). The low-temperature adsorption-regeneration purification system for flue gas can recover and utilize cold energy in flue gas multiple times, thereby reducing the consumption of other energy sources.

The present invention relates to the field of hydrogen purification, and in particular to a method for preparing and purifying hydrogen for fuel cells and a system device thereof. The raw hydrogen is respectively heat exchanged with the product gas and the regenerated gas after the expansion heat exchange through the heat exchange mechanism I, i.e., the N-stage heat exchanger, and a part of the hydrogen is separated and enters the refrigeration mechanism to obtain supercooled hydrogen. The raw hydrogen and the supercooled hydrogen are cooled by the heat exchange mechanism II and then enter the adsorption mechanism. The impurities in the raw hydrogen are purified to meet the requirements of hydrogen for fuel cells through the low adsorption mechanism, thereby obtaining hydrogen product gas for fuel cells; the cold hydrogen is heated by the heater, and the heated hydrogen is used as the medium for regeneration and reheating of the low-temperature adsorption mechanism and thermal regeneration. The purified product gas returns to the heat exchange mechanism I to exchange heat with the raw hydrogen, and is output to the storage device or other processing equipment after heating. The impurity content S in the obtained product gas is less than 0.004ppm, and CO is less than 0.02ppm, which ensures the long-term stable operation of the fuel cell.

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 present invention provides a cryopump and a regeneration control method thereof. The cryopump includes a cryopump container, a cold shield unit, an adsorption array, a regeneration unit, and a refrigeration unit. The cold shield unit is installed inside the cryopump container, and the adsorption array is composed of an outer condensation shielding plate and an inner cryogenic adsorption plate, and the surface is electroplated and polished. The cooling structure adopts a combination connection method of a main cooling plate and an annular secondary cooling plate to realize the separate disassembly and assembly of the condensation shielding plate and the cryogenic adsorption plate. The regeneration control method monitors the pressure in the container in real time, calculates and processes the pumping speed data. When the pumping speed is lower than the set threshold, the system automatically starts the regeneration process and selects different regeneration strategies (primary, secondary, and complete regeneration) according to the environment and gas type. During the regeneration process, it is determined whether it is completed by temperature data. After the regeneration is completed, the system resumes normal operation and continues to evacuate. The overall process ensures the continued effectiveness and system stability of the cryopump.

Disclosed is a low-temperature adsorption system, comprising: an adsorption module and a heat exchange module. The adsorption module is used for adsorbing low-temperature flue gas at a temperature below room temperature to be purified into low-temperature clean flue gas. The adsorption module has a gas inlet end used for inputting the low-temperature flue gas, an air outlet end used for discharging the low-temperature clean flue gas, a feeding end used for inputting an adsorbent and a discharging end used for discharging the adsorption-saturated adsorbent. A cold side inlet of the heat exchange module is communicated with the air outlet end of the adsorption module, the low-temperature clean flue gas enters a cold side of the heat exchange module to exchange heat with substances on a hot side of the heat exchange module so as to recover the cooling capacity in the low-temperature clean flue gas, and the cooling capacity is used for cooling the adsorbent before being input into the adsorption module.

The invention provides a hydrogen low-temperature precooling device and method which are suitable for deep precooling treatment before hydrogen liquefaction in a liquid hydrogen preparation process. The device comprises a raw material hydrogen cooling and converting system, a mixed refrigerant refrigerating system and a nitrogen circulating refrigerating system, multi-stage heat exchange is achieved through a main heat exchanger and a subcooler, and efficient cooling capacity distribution is provided by adopting a multi-stage refrigerant separation and throttling path. After being cooled, the hydrogen sequentially passes through the low-temperature adsorber and the ortho-parahydrogen converter, so that precooled hydrogen of which the temperature and the molecular structure both meet the liquefaction requirements is obtained. The device supports structure optimization and module simplification, can adopt externally supplied liquid nitrogen as a cold source, and adapts to different pre-cooling scenes. According to the method, through a refrigerant multi-section throttling and reheating recovery mechanism and a nitrogen double-channel cooling mechanism, cooling capacity output and energy efficiency utilization are both considered, and the method has the advantages of being safe in operation, compact in structure, accurate in temperature control and the like.

The invention discloses a lignin-rich biomass derived carbon material, a preparation method thereof and a hydrogen isotope separation method, and belongs to the technical field of porous materials. The ratio of ultramicropores of the carbon material is larger than or equal to 70%, the porosity is 0.35-0.45, the surface characteristic is that the sp3 / sp2 carbon hybridization ratio is 0.4-0.8, and the ultramicropores are formed by interweaving cellulose derived carbon layers and lignin derived fragments. The method is obtained through a synergistic regulation strategy of pre-oxidation-pyrolysis of biomass rich in lignin content. The carbon material realizes the selective enrichment of D2, the adsorption capacity reaches 4.76 mmol g <-1 >, in a 77K dynamic penetration experiment, the penetration time of D2 is delayed by 30% compared with that of H2, and the dynamic selectivity reaches 1.4. The carbon material is stable in performance after being pickled and has no obvious attenuation after being recycled, and a low-cost and large-scale solution is provided for hydrogen isotope separation. In addition, the carbon material is suitable for deuterium fuel purification, isotopic tracing and low-temperature adsorption separation processes in the nuclear energy field, and has the characteristics of cheap and easily available raw materials, simple process, high separation efficiency and the like.

The present invention relates to the technical field of helium extraction, and particularly to a method for extracting high-purity helium based on cryo-adsorption. The content includes: in a low-temperature environment, using cryo-adsorption materials, through a dynamic adsorption scheduling optimization algorithm, performing adsorption treatment on the mixed gas to obtain unadsorbed helium and the cryo-adsorption material after adsorbing impurity gases; performing desorption treatment on the cryo-adsorption material after adsorbing impurity gases to obtain desorbed and enriched helium; performing cryogenic fractionation treatment on the desorbed and enriched helium and the unadsorbed helium to obtain high-purity helium. It solves the technical problems of low helium extraction efficiency, low purity, and low recovery rate in traditional helium extraction methods.

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.