1288 results about "Helium gas" patented technology

The invention discloses a treatment method for helium holes of an electrostatic chuck, and belongs to the technical field of electrostatic chucks, and the treatment method comprises the following steps: S1, pretreating a gas passage opening and the surface of a substrate: cleaning the helium holes and fine cracks of the substrate, and roughening the surface of the substrate; s2, a ceramic piece is glued to the helium hole opening, wherein the ceramic piece and the side wall of the helium hole opening are tightly attached and bonded together through an adhesive; s3, filling the helium hole ceramic piece with insulating glue: filling holes, cracks and other fine interfaces; s4, grinding the insulation paste filling part to be flush with the surface of the substrate so as to keep the overall flatness; s5, performing meltallizing on the surface of the substrate by using a meltallizing process to obtain the meltallizing coating, uniformly covering the insulating glue filling layer with the meltallizing coating, and forming good combination with the substrate; and S6, grinding and polishing: after the meltallizing coating is completed, grinding or polishing the meltallizing coating to ensure that the surface of the meltallizing coating is smooth.

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

The present invention relates to a heat exchanger rupture experimental system and method for a fusion reactor helium-cooled blanket cooling system. The heat exchanger rupture experimental system for a fusion reactor helium-cooled blanket cooling system comprises: a first circuit for conveying helium; a second circuit for conveying water; a simulated rupture pipe, one end of which is connected to the first circuit and the other end of which is connected to the second circuit, and a valve is provided on the simulated rupture pipe; and a steam-water collection device, which is provided on the helium conveying pipe. By providing the heat exchanger rupture experimental system for a fusion reactor helium-cooled blanket cooling system, the effects of a heat exchanger rupture accident on the pressure and temperature of the secondary water circuit, as well as the mechanism and possible effects of secondary water entering the helium circuit through the rupture, can be conveniently studied through simulated tests.

A water hydraulic cylinder impact leakage detection test bench based on helium detection, the test bench comprising a test bench body, a water hydraulic cylinder (12), a helium cylinder (14), a sealed container (16) and an impact device, wherein the water hydraulic cylinder (12) is detachably mounted on the test bench body; an outlet end of the helium cylinder (14) is in communication with a rodless cavity of the water hydraulic cylinder (12), and a pressure-reducing valve (13) is mounted between the helium cylinder (14) and the water hydraulic cylinder (12); the sealed container (16) is detachably mounted in a rod cavity of the water hydraulic cylinder (12), and a helium mass spectrometer leak detector (15) is mounted on the sealed container (16); and the impact device is fixedly mounted on the test bench body, is connected to a piston rod of the water hydraulic cylinder (12), and is configured to provide impact power for the water hydraulic cylinder (12). The test bench uses an accumulator (6) as a pressure power source, which can provide rapid, stable and high-flow oil, thereby solving the problem of the pressure and flow of ordinary hydraulic pumps failing to meet test requirements; and compared with traditional impact generation by using hammer dropping, the test bench can precisely control the magnitude of the generated impact by means of the pressure of the accumulator (6), and is safe and reliable.

The invention provides a neon removal system for producing high-purity helium, and particularly relates to the technical field of gas purification, and the neon removal system for producing the high-purity helium comprises a circulation unit and a purification unit, wherein the circulating unit comprises a compressor, an oil filtering device, a first heat exchanger, a second heat exchanger, a first adsorber group, a third heat exchanger, an expansion machine and a fourth heat exchanger; the circulating unit further comprises a liquid nitrogen source, a pipeline of the liquid nitrogen source is connected with one inlet of the second heat exchanger, and the liquid nitrogen source is connected to the outside from an outlet of the second heat exchanger; the purification unit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a second adsorber group, through pre-cooling of the liquid nitrogen source and expansion of the expansion machine, the raw material helium is cooled to 20 K, then freezing condensation separation is conducted through the second adsorber group in the 20 K temperature zone, and high-purity helium which is lower in neon content and meets the requirement can be obtained.

The invention belongs to the technical field of hydrogen adsorption, leakage and sequestration simulation experiments, and particularly relates to a system and a method for detecting the hydrogen adsorption, leakage and sequestration capacities of soil. The system comprises a simulation bin system, a hydrogen inlet system, a helium inlet system, a water inlet system and a gas outlet system, the simulation bin system is divided into an air simulation bin, a sample bin and a gas source bin by a pressurizing device and a supporting device, and a water vapor heating disc is arranged in the gas source bin. The hydrogen inlet system is in valve control connection with the gas source bin, the helium inlet system is in valve control connection with the air simulation bin and the gas source bin, the water inlet system is in valve control connection with the steam heating disc, and the gas outlet system is in valve control connection with the air simulation bin and the gas source bin. The method comprises eight steps, and the processes of adsorption, leakage and sealing storage of hydrogen in soil when the hydrogen leaks upwards under different air temperatures and air pressures in the nature are simulated. Therefore, the system and the method can provide theoretical and technical guidance for earth surface exploration of natural hydrogen.

The invention discloses a helium detection device and method for the airtightness of a bonding interface and a bonding microcavity, and belongs to the field of the airtightness of MEMS devices. The device comprises a sample holder, a mass spectrometer, a molecular pump, a mechanical pump and other components, helium is used as detection gas, and the helium is leaked only through a bonding interface through a customized and processed test sample and sample holder structure, so that the interference of other leaks in a non-bonding area on a test result is avoided. The testing method comprises the steps of sample introduction, vacuum pumping, helium filling, signal detection, dynamic and steady state testing and the like, the helium leak rate is monitored in real time by combining with a helium mass spectrometer, and the minimum leak detection rate is that high-sensitivity air tightness detection is ensured. According to the method, the airtightness of the bonding interface can be independently evaluated, and a reliable basis is provided for development of a novel bonding process. The method is suitable for air tightness detection and evaluation of the bonding process in MEMS device processing and manufacturing.

The invention relates to the technical field of data processing, in particular to a vacuum box helium leak detection equipment data processing method. The method comprises the following steps: acquiring a helium concentration signal, filtering the helium concentration signal to obtain a preprocessed concentration signal, setting a reference point of each data point, constructing a reference point set of each data point, and calculating the credibility of the reference points in the reference point set; determining the confidence weight of each reference point based on the credibility of the reference points; and taking the product of each confidence weight and the preprocessed concentration data of the corresponding reference point as a local contribution value, and taking the sum of a plurality of local contribution values as a final filtering result. The helium concentration data processing method and device have the effect of improving the helium concentration data processing accuracy.

The invention relates to a method for preparing a titanium alloy coating through cold spraying. Belongs to the technical field of cold spraying. The method comprises the following steps: firstly, preparing nanoscale TC4 powder, wherein the average particle size is 20 microns; cleaning and sand blasting roughening are sequentially carried out on the surface of the TC4 substrate under the technological conditions that the air pressure intensity is 0.4 MPa, the sand blasting distance is 10 cm, and the moving speed is 70 cm / min. And spraying and depositing the prepared mixed powder on the surface of TC4 under a certain condition by using a Laval spray gun by adopting cold gas power spraying equipment to form a coating. The cold spraying conditions are that helium is used as working gas, the powder feeding amount is 20 g / min, the moving speed of a spray gun is 1 cm / s, the spraying pressure intensity is 0.3-0.9 MPa, the spraying distance is 2 cm, and the gas temperature is 400-600 DEG C. The TC4 coating is successfully prepared through the cold spraying technology, the TC4 coating is tightly combined with a TC4 base body, and the method can be used for repairing a TC4 titanium alloy workpiece.

The invention discloses an oil-immersed transformer pressure-maintaining sealing detection device, and relates to the technical field of detection devices, the oil-immersed transformer pressure-maintaining sealing detection device comprises a transformer body, the outer surface of the transformer body is provided with an oil storage tank, and the outer surface of the transformer body is provided with a preliminary survey assembly used for preliminarily detecting whether the inner wall of the oil storage tank is slightly damaged. According to the pressure-maintaining sealing detection device for the oil-immersed transformer, when the infrared measuring instrument detects that a suspicious gap exists in the outer wall of the oil storage tank, the negative pressure bin can be inserted into the oil storage tank and rotated in all directions to directly face the suspicious small gap in the inner wall of the oil storage tank, and the negative pressure bin is moved to be tightly attached to the inner wall of the oil storage tank; the oil dirt at the position is cleaned up in a heating and negative pressure mode, then mixed gas of helium and fluorescent powder is conveyed into the sealed space, and the fluorescent powder can be driven by the helium to penetrate through the inner wall of the oil storage tank along the tiny gaps to be attached to the outer surface of the oil storage tank.

The invention relates to the technical field of helium resource evaluation, and particularly discloses a reservoir helium resource dynamic evaluation method based on real-time data, and the method comprises the steps: obtaining precise helium concentration data; performing three-dimensional modeling and finite element stress field coupling analysis on the precise helium concentration data to generate helium distribution migration data; based on the helium distribution migration data, adopting a deep learning model for processing to obtain helium resource quantity evolution data; performing dynamic recovery rate evaluation and path optimization processing on the helium resource quantity evolution data under multiphase flow constraint to generate a final mining scheme; performing strategy self-correction processing on the final mining scheme, and finally outputting a dynamic evaluation and intelligent regulation and control scheme; potential exploitation risks can be predicted and avoided through reservoir stress simulation and multiphase flow optimization, safe exploitation of the reservoir is ensured, and the system is beneficial to prolonging the service life of the reservoir through efficient resource recovery and accurate resource evaluation.

The invention discloses a high-altitude suspension type wind-solar combined power generation device and a working method thereof, the device comprises a high-altitude floating assembly, the high-altitude floating assembly comprises a floating air bag, the floating air bag is provided with an air inlet and an air outlet, and the floating air bag is communicated with a flexible helium pipe; the vertical axis wind turbine assembly comprises a vertical axis wind turbine, and the vertical axis wind turbine is fixed between the two floating air bags; the solar tracking photovoltaic assembly comprises a photovoltaic panel, and the photovoltaic panel is installed on the floating air bag. The fixed cable assembly comprises a twisted rope, one end of the twisted rope is connected with the floating air bag, and the other end is connected with the ground. According to the invention, abundant high-altitude solar energy and wind energy which are neglected for a long time are efficiently utilized, new energy power generation land and original unsuitable complex landforms can be fully utilized, and reference for a high-altitude new energy power generation device form is provided.

The invention belongs to the technical field of hydroacoustic detection, and particularly relates to a high-precision multi-beam sonar with echo noise suppression, the high-precision multi-beam sonar comprises a sonar detector, a transducer and a heater, the transducer is arranged in the middle of the inner side of the sonar detector, and the heater is arranged in the sonar detector. The sonar detector converts electric energy into a sound wave signal through a transducer by arranging the flow guide cover, the honeycomb damping shell, the silica gel damping agent filling layer, the reflection energy absorption frame, the variable-diameter reflection hole and the active isolation mechanism, and the sound wave signal is propagated in water. When sound waves rebound after encountering obstacles and being reflected, the honeycomb damping shell converts sound energy into heat energy through viscous friction of the silica gel damping agent filling layer in the honeycomb damping shell, and the honeycomb structure prolongs the noise propagation time through multiple reflection paths. The active isolation mechanism guides gas in a high-pressure helium tank through a micro air pump and enables the gas to be sprayed out of an air spraying hole, a bubble curtain with the diameter smaller than 1 mm is continuously manufactured to form an impedance abrupt change layer, and the influence of noise is further reduced.

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

Provided are a natural gas helium extraction device and a natural gas helium extraction method. The natural gas helium extraction device comprises a primary concentration part, a dehydrogenation and dehydration part, a secondary concentration part, and a final purification part. The primary concentration part comprises a first compressor, a first preheater, and a first membrane separator connected in sequence. The dehydrogenation and dehydration part comprises an oxygen delivery pipe, a mixer, a plurality of dehydrogenation towers connected in parallel, a low-temperature water separator, and a water remover. The secondary membrane separator of the secondary concentration part comprises a permeate gas outlet and a non-permeate gas outlet. The non-permeate gas outlet is connected to the primary concentration part. The final purification part comprises a nitrogen circulating cooling component and a pressure swing adsorption (PSA) device. The PSA device is connected to the permeate gas outlet of the secondary membrane separator and is used to output high-purity helium. The nitrogen circulating cooling component, the PSA device, and the low-temperature water separator form a cooling loop. The natural gas helium extraction device and the natural gas helium extraction method can significantly reduce safety risks and effectively reduce equipment costs.

According to the embodiment of the invention, leakage characteristic data of a plurality of sensors are collected in real time; performing filtering processing on the leakage characteristic data and then determining an area where a leakage source of the vacuum equipment is located; determining the confidence coefficient of the area where the leakage source is located, determining the confidence coefficient of the position of the leakage source based on the confidence coefficient of the area where the leakage source is located, and giving an alarm when the confidence coefficient of the position of the leakage source reaches a confidence threshold value; and injecting helium to the leakage source position of the vacuum equipment in a preset time period to perform calibration test, calculating a calibration error of the leakage source position of the vacuum equipment, and when the calibration error exceeds an error threshold value, recalculating the confidence coefficient of the leakage source position and resetting the confidence coefficient threshold value. The problems of high cost, low detection precision, slow response speed, dependence on artificial experience and incapability of real-time monitoring due to long-time use of a helium mass spectrum detection method when leakage positioning detection is performed on a leakage source of vacuum equipment in the prior art are solved.

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 a storage cryostat (2) for liquid helium (7), suitable for transferring liquid helium (7) from the storage cryostat (2) into an application cryostat (3), wherein the storage cryostat (2) comprises: - a vacuum-insulated helium vessel (6) for liquid helium (7), the helium vessel (6) having a vertical height HHB that can be filled with liquid helium (7), - a transfer line (4) for liquid helium (7), having an inlet opening (20) which opens into a lower region of the helium vessel (6), in particular into a lower fifth of the helium vessel (6), and - a convection-suppression system (9) which is arranged within the helium vessel (6) and impedes vertical convection of liquid helium (7) in the helium vessel (6), characterised in that the convection-suppression system (9) is formed in the helium vessel (6) over a height interval (IKS) with a vertical height HKS, where HKS ≥ 0.50 × HHB, and in that the convection-suppression system (9) impedes the vertical convection of liquid helium (7) in the helium vessel (6) over the region of the height interval (IKS) of the convection-suppression system (9). The invention provides a storage cryostat that enables simple and rapid transfer of liquid helium from the storage cryostat into the application cryostat, with minimised helium losses.

This invention discloses a firecracker-style controlled nuclear fusion and fission synergistic power generation device and method. The power generation device includes a fission-fusion reaction system, a circulating cooling system, and other accessories. The fission-fusion reaction system includes a neutron gun, fuel spheres, a fuel sphere storage and delivery device, and a vacuum reactor. The circulating cooling system includes a circulating fan, a voltage regulator, a steam turbine, a steam generator, delivery pipelines, and a water pump. Other accessories include an energy storage and control system and a vacuum pump. This invention innovatively integrates the start-up mechanism, drawing on the firecracker-style multi-reactor relay concept, combining nuclear fission and nuclear fusion. It utilizes the high temperature and pressure generated by nuclear fission to start nuclear fusion, reducing start-up difficulty and cost. Simultaneously, it efficiently converts and utilizes energy, employing helium for heat transfer. Helium's high thermal conductivity, low density, high specific heat capacity, and chemical inertness allow it to effectively carry away the heat stored in the phase change microspheres, comprehensively collecting and converting nuclear reaction heat energy, thus improving energy conversion efficiency.

The invention belongs to the technical field of stainless steel composite plates, and particularly relates to an iron-nickel stainless steel composite plate production process which comprises the following steps: performing plasma sputtering cleaning on a carbon steel base layer; the iron-nickel-stainless steel composite layer is subjected to laser micro-cladding treatment to form a micro-groove array, and a nano nickel-titanium alloy transition layer is preset in the micro-groove array; explosive cladding is carried out in a helium and argon mixed gas environment with the oxygen content smaller than or equal to 10 ppm, so that the carbon steel base layer and the iron-nickel-stainless steel cladding layer are subjected to interface metallurgical bonding to form a composite plate blank; the composite plate blank is hot-rolled and water-cooled to 500 DEG C or below after being heated and subjected to heat preservation; and the rolled composite plate blank is placed in mixed gas of nitrogen and hydrogen for isolation annealing, the bonding strength and the shearing strength are improved through an interface gradient diffusion layer composite structure constructed through the nanoscale, and interface oxidation and stress concentration in the rolling process are inhibited through asymmetrical rolling and a nanometer heat insulation coating; and multi-stage controlled cooling and diffusion barrier annealing are cooperatively regulated and controlled, so that the pitting corrosion resistance potential of the iron-nickel stainless steel clad layer is improved.

The invention relates to the technical field of fuel cell membrane electrode testing, and discloses a fuel cell membrane electrode airtightness testing system and method, and the system comprises a tool clamp which comprises a cavity and a clamping assembly, the cavity is in a shell shape, and the top of the cavity is open; the clamping assembly is used for clamping a sample membrane electrode and sealing and fixing the sample membrane electrode at the top opening of the chamber; the gas supply mechanism is used for supplying helium to the inner cavity of the chamber, enabling the inner side pressure of the sample membrane electrode to be higher than the outer side pressure and forming a stable pressure difference; and the detection mechanism comprises a helium leak detector and a mechanical arm, and the mechanical arm grabs the helium leak detector to carry out global detection and smelling on the outward surface of the sample membrane electrode to find leakage points and records the leakage rate of each leakage point. According to the air tightness test system and the test method, whether the membrane electrode leaks or not can be conveniently and efficiently judged, the position of a leakage point is positioned, and the area of the leakage point is estimated.

The invention relates to an installation for liquefying hydrogen, comprising a circuit for hydrogen to be cooled, a set of heat exchanger(s) in heat exchange with the circuit, a cooling system comprising a refrigerator with a cycle of refrigeration of a first cycle gas comprising helium and / or hydrogen, the circuit comprising at least one catalysis section so as to ensure conversion of the ortho-hydrogen into para-hydrogen, the circuit further comprising a first bypass portion bypassing at least one catalysis section, the downstream end of the circuit comprising two parallel branches that are not combined and are supplied respectively with the hydrogen that has passed through the first bypass portion and hydrogen that has passed through the catalysis section so as to provide two distinct hydrogen streams that have different relative proportions of ortho-hydrogen and para-hydrogen.

Filling a balloon with a volume of material, the balloon having an adhesive staging segment formed about a peripheral surface of the moldable adhesive cross sectioned profile of the moldable adhesive ring. Retaining the volume of material within an expansion cavity of the balloon by applying a tensile force in a longitudinal direction between ends of the tubular balloon neck segment to expose the moldable adhesive ring from the adhesive staging segment and compressing the exposed moldable adhesive ring to form a seal. The material can be a gas, air, Helium, etc. A tether can be inserted into the balloon neck prior to filling and sealing, where the sealing step secures the tether to the balloon.

The invention relates to an air tightness detection device and method based on resonance frequency shift of a resonant cavity, belongs to the technical field of air tightness detection, and aims to solve the problems of high equipment cost, complex operation, low efficiency and difficulty in realizing multi-parameter quantitative detection in the traditional air tightness detection technology. High-purity helium with rated pressure is filled into a to-be-detected piece through a gas compressor, the to-be-detected piece is placed in a volume-adjustable detection container after pressure maintaining, and leaked helium is pumped by a vacuum pump to flow into a resonant cavity; resonance frequency deviation caused by helium concentration changes is monitored, temperature and humidity calibration data are combined, three air tightness parameters including the leakage rate (Pa.m / s), the leakage speed (mL / min) and the leakage pressure (Pa) are calculated in real time through a microcontroller, and the air tightness grade of a to-be-detected piece is output according to the air tightness detection standard. According to the device, the volume of the detection container is adaptively adjusted through the sliding rail, and the detection efficiency and adaptability can be remarkably improved by combining frequency mixing excitation and a rapid frequency calibration technology; according to the method, resonance frequency shift-helium concentration-airtightness parameters are converted, and high-precision, multi-parameter and integrated airtightness detection is realized. The invention has the advantages of fast response speed, strong anti-interference performance, low cost and the like, is suitable for fast automatic leak detection of industrial products such as sealing devices, pressure containers and the like, and provides a new scheme for trace gas detection and gas tightness grading.

The invention provides a forced flow cooling system for horizontal testing of an arc-shaped superconducting magnet, and relates to the technical field of superconducting magnet testing devices. The forced flow cooling system for the horizontal test of the arc-shaped superconducting magnet comprises a first transmission pipeline configured to transmit helium; a second transfer line configured to transfer liquid helium; the air inlet pipeline is respectively connected with the first transmission pipeline and the second transmission pipeline and is wound on the arc-shaped superconducting magnet; wherein the helium is used for cooling the arc-shaped superconducting magnet to a first preset temperature under the condition that the first transmission pipeline is communicated with the gas inlet pipeline and the second transmission pipeline is blocked from the gas inlet pipeline; and under the condition that the first transmission pipeline is disconnected from the gas inlet pipeline and the second transmission pipeline is communicated with the gas inlet pipeline, the liquid helium is used for cooling the arc-shaped superconducting magnet at the first preset temperature to a second preset temperature.

The invention discloses a temperature-variable superconducting magnet low-temperature testing system and method, and relates to the technical field of superconducting magnet low-temperature testing. The system specifically comprises a superconducting magnet circulation loop which is configured to be communicated with a superconducting magnet to be tested to form a closed circulation channel for helium flow; the heat exchanger is arranged in the superconducting magnet circulation loop and is configured to cool helium in the superconducting magnet circulation loop through heat exchange with an external low-temperature medium; the helium circulating pump is arranged in the superconducting magnet circulating loop and is used for driving helium to perform forced flow circulation in the closed-loop circulating channel; the temperature control assembly comprises a heater arranged in the superconducting magnet circulation loop; wherein the flow and the temperature of helium entering the superconducting magnet to be tested are controlled by adjusting the helium circulating pump and the heater. The invention aims to design a test system which does not need an expensive refrigerator, is simple and convenient to operate and can realize accurate control of a wide temperature zone and a forced flow cooling environment.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention discloses a preparation method of plasma activated water based on a micro-nano bubble synergistic effect, and mainly solves the technical problems that the generation efficiency of liquid-phase active particles in the plasma activated water prepared by the existing method is low, the chemical activity of the plasma activated water is difficult to maintain and the like. The preparation method comprises the following steps: introducing micro-nano bubbles into pure water until the pure water is saturated to obtain micro-nano bubble water; then performing plasma activation treatment on the micro-nano bubble water within 3 minutes to obtain plasma activated water based on the micro-nano bubble synergistic effect; the gas adopted by the micro-nano bubbles is one of air, oxygen, nitrogen or helium. The chemical activity of the plasma activated water is enhanced, the maintenance time of the activity of the activated water is greatly prolonged, efficient production and long-acting storage of the plasma activated water are facilitated, and the method has great significance in biomedical application of the plasma activated water.

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

The invention discloses a suspension air supply module helium detection test system and method, and relates to the technical field of automobile part detection, and the system comprises a helium detection airtight cabin which is used for accommodating a suspension air supply module to be detected and forming a closed test environment; the nitrogen pre-detection module is connected with the helium detection airtight cabin and is used for pre-filling nitrogen to detect macroscopic leakage; the helium supply module is connected with the helium detection airtight cabin and used for filling helium with set pressure into the suspension air supply module; the vacuum pump is connected with the helium detection airtight cabin through a vacuum switching valve and is used for vacuumizing the helium detection airtight cabin to a preset vacuum degree; the helium detection mass spectrometer is configured to detect the helium leakage rate in the helium detection airtight cabin; and the helium recovery device is connected with the helium detection airtight cabin and is used for recovering residual helium after the test is completed. According to the scheme, the adaptability limitation of a traditional helium detection technology on a complex non-standard structure can be broken through, and the detection sensitivity and the detection efficiency of tiny leakage are improved.