766results about "Specific gas purification/separation" patented technology

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

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

The invention discloses a medical oxygen generator with sterilization and dust removal functions, and relates to the technical field of oxygen generators, the medical oxygen generator comprises an oxygen generator shell, a handle, a touch screen, an oxygen generator bottom plate, an air inlet pipe, a dust removal and sterilization device, an air compression device, a heat dissipation pipe, an adsorption tower, a heat dissipation device, a cleaning device and a humidification cup, the air compression device can suck air and compress air, the dust and bacteria removal device can remove pollutants such as dust and bacteria in the air and prevent the pollutants from entering the air compressor to affect the quality of oxygen inhaled by a patient, the heat dissipation device rapidly dissipates heat of the air in the heat dissipation pipe, the adsorption effect of the adsorption tower is improved, and the service life of the adsorption tower is prolonged. The cooled air enters the adsorption tower, the adsorption tower adsorbs nitrogen in the air, the separated oxygen is decompressed and then conveyed into the humidifying cup, and the oxygen humidified by the humidifying cup is conveyed into an oxygen catheter of a patient.

The invention belongs to the field of pressure swing adsorption oxygen production equipment, and particularly relates to a radial flow adsorption tower for optimizing variable mass flow distribution. The adsorption tower comprises a tower body (1) composed of an upper seal head (11), a cylinder (12) and a lower seal head (13), and an outer gas channel pipe (2-2) and an inner gas channel pipe (2-1) are arranged at the bottom of the tower body (1) and serve as channels for gas to enter and exit from the tower body; a supporting flat plate (3) is arranged at the bottom of the cylinder body (12), a flow guide sealing head (4) is welded below the supporting flat plate (3), the gap space is occupied, and the airflow direction in a lower sealing head (13) is changed; an outer-layer porous barrel (5) and an inner-layer porous barrel (6) are fixedly connected to the middle part of the inner cavity of the tower body (1), and the bottom of the outer-layer porous barrel (5) and the bottom of the inner-layer porous barrel (6) are welded with the upper part of the supporting flat plate (3). According to the invention, the radial pressure and flow velocity distribution of the adsorbent bed layer between the outer-layer porous cylinder and the inner-layer porous cylinder in the height direction is optimized, the internal gap space is reduced, and the adsorbent efficiency is improved.

The invention relates to the technical field of oxygen supply monitoring, regulation and control, and discloses a medical oxygenerator multi-source information fusion monitoring evaluation method and system, and the method comprises the following steps: S101, collecting the equipment operation parameters and environment parameters of a medical oxygenerator in real time, and obtaining the physiological demand data of a patient; s102, on the basis of the equipment operation parameters and the environment parameters, constructing coupling characteristics for representing the operation state of the oxygen generator; s103, establishing an environmental quantitative influence model of the environmental parameters on the oxygen production efficiency; s104, performing coupling analysis on the basis of the physiological demand parameters of the patient, the coupling characteristics and the environmental quantitative influence model, and determining a dynamic oxygen supply regulation and control strategy; and S105, monitoring the running state of the oxygen generator in real time, and triggering graded early warning when the oxygen generator is abnormal. Through multi-source data fusion and intelligent regulation and control, the oxygen supply demand of a patient is accurately matched, the environmental adaptability is optimized, the oxygen supply efficiency is improved, a grading early warning mechanism is integrated, intelligent monitoring and abnormal protection are achieved, and the safety and reliability of the oxygen generator are improved.

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

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

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

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

The utility model relates to a household oxygen generator, the household oxygen generator comprises a shell, the shell is internally provided with a compression mechanism, a first gas circuit module and an oxygen generation mechanism which are communicated in sequence, the first gas circuit module comprises a flow guide pipeline, a movable pipeline and a locking assembly, the movable pipeline is movably connected with the flow guide pipeline, and the locking assembly is connected with the movable pipeline. The locking assembly is in transmission connection with the movable pipeline, the flow guide pipeline is connected with the oxygen generation mechanism, the locking assembly is provided with a locking position and an unlocking position, when the locking assembly is located at the locking position, the movable pipeline is connected with an air inlet of the oxygen generation mechanism in a clamped or inserted mode, and when the locking assembly is located at the unlocking position, the movable pipeline is connected with an air outlet of the oxygen generation mechanism in a clamped or inserted mode. When the locking assembly is located at the unlocking position, the movable pipeline is separated from the air inlet of the oxygen generation mechanism. According to the household oxygen generator, the position of the movable pipeline is changed through the locking assembly so that the oxygen generation mechanism can be assembled and disassembled, and the difficulty of communication and disassembly of the oxygen generation mechanism and the first gas path module can be lowered.

The invention relates to the technical field of oxygen generators, in particular to an oxygen generator with oxygen output concentration monitoring and pre-compensation functions. The oxygen generator comprises a lower buffer valve, a lower buffer communication valve, an upper buffer valve, a lower buffer valve, a data acquisition module, a data processing module and an adjusting module, wherein the data acquisition module is used for acquiring pressure data and oxygen concentration at an outlet of the oxygen generator; the data processing module is used for obtaining the high-pressure degree of each circulation according to the pressure data and the oxygen concentration at the outlet of each cycle of each circulation of oxygen discharge, and then determining the high-pressure duration and the current compensation demand degree; acquiring a slow voltage-sharing demand factor according to the current compensation demand degree and the duration of the high-voltage duration; and the adjusting module is used for adjusting opening and closing of the valve according to the slow pressure equalizing demand. According to the invention, the influence of temperature on the adsorption efficiency of the zeolite molecular sieve is reduced, the concentration of oxygen produced by the oxygen generator is maintained, and the pre-compensation of the oxygen concentration is realized.

Hydrogen purification devices and their components are disclosed. In some embodiments, the devices may include feed frame(s) and / or permeate frame(s) each having at least one elongate hole distinct and spaced from an open region, at least one output aperture, and / or at least one input aperture. The elongate hole may be disposed between the open region and the at least one input aperture. The elongate hole may be capable of receiving a portion of the mixed gas stream that leaks from the open region and / or at least one input conduit. The devices may additionally include gasket frames having at least one notch in one or more edges of a perimeter base. The notch may be in fluid communication with a longitudinal end portion of the elongate hole. The devices may further include first and second side plates that collectively enclose a plurality of frames.

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

The invention discloses a pressurized output pressure swing adsorption type oxygen generator which comprises two oxygen generation tanks, the side walls, close to the top end, of the two oxygen generation tanks are detachably connected with a transverse connection pipe, the middle of the side wall of the top of the transverse connection pipe is detachably connected with a ventilation cover plate, and the ventilation cover plate is of an umbrella-shaped structure; the oxygen generating device has the following advantages that the transverse connecting pipe is connected between the tops of the two oxygen generating tanks, when the pressure in one oxygen generating tank is too large, the movable sealing plate on the corresponding side can be driven to rotate along the torsional spring to be opened, at the moment, the pressure can enter the vertical pipe along the transverse connecting pipe, and the oxygen generating device is convenient to use. Meanwhile, the blocking column is jacked open to enable pressure to enter the ventilation cover plate, and finally the pressure is discharged from the hole formed in the side wall of the ventilation cover plate, so that the pressure in the two oxygen generation tanks can be reduced, great damage of the pressure to the molecular sieve is avoided, and the service life of the molecular sieve is prolonged.

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

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

The nitrogen making machine with the storage function comprises a base, an air compressor, a dryer, an air filter and a pair of adsorption towers are installed on the base, a supporting table is arranged on one side of one adsorption tower, a plurality of through holes are formed in the surface of the supporting table, a limiting opening is formed in the center of the supporting table, and an air storage tank is placed in the limiting opening; a sensor is installed on the top of the air storage tank, a plurality of positioning blocks are fixedly connected to the side wall of the air storage tank, a hanging ring is fixedly connected to the top of each positioning block, an air conveying opening and an air outlet are formed in the air storage tank, a locking piece is installed on the air conveying opening, and a cooling mechanism is installed on the base. According to the device, prepared nitrogen can be stored through the gas storage tank, the gas storage tank can be cooled through the cooling mechanism, quick disassembly and assembly of the gas storage tank can be completed without manually screwing or unscrewing a fastener with the help of a tool, a pipeline connected to the gas storage tank can be locked and fixed, and the gas storage tank is convenient to disassemble and assemble. Therefore, nitrogen escape caused by loosening and falling off of the pipeline is avoided.

The invention provides a gas separation unit, an air conditioner and a control method thereof, the gas separation unit comprises a gas storage container, a pressure release valve and a filter device, mixed gas before separation enters the gas separation unit through the filter device, the gas storage container is used for temporarily storing separated target gas, the gas storage container is provided with a first outlet, and the first outlet is communicated with the pressure release valve. And the first outlet is connected to the filtering device through a pressure release valve. According to the gas separation unit, when the gas separation unit is applied to the air conditioner and is used for separating oxygen in air and the separated oxygen is temporarily stored in the gas storage container, under the condition that the air pressure in the gas storage container is too large and a certain risk exists, the pressure release valve can be controlled to be opened, so that the pressure of the gas storage container is released, and the risk caused by the too large air pressure is eliminated. In the pressure relief process, discharged gas can impact the filtering device in the direction opposite to the gas inlet direction of the filtering device, so that the filtering device can be automatically cleaned, the filtering device does not need to be manually disassembled for cleaning, and the pressure relief device is very convenient to use.

The invention belongs to the technical field of medical equipment, and discloses an oxygen generator which comprises an adsorption cylinder, a compressor, a humidifying cup and a condensation water collection assembly, the adsorption cylinder is filled with an adsorbent for adsorbing nitrogen, the compressor is used for providing pressurized air for the adsorption cylinder, the humidifying cup is used for humidifying oxygen from the adsorption cylinder, and the condensation water collection assembly is used for collecting water from the adsorption cylinder. The humidifying cup is provided with a liquid inlet, the condensation and water collection assembly is provided with a liquid outlet, an air inlet communicated with the compressor and an air outlet communicated with the adsorption barrel, the condensation and water collection assembly is used for condensing water vapor in pressurized air generated by the compressor into liquid, and the liquid is discharged through the liquid outlet and enters the humidifying cup through the liquid inlet so as to supplement water to the humidifying cup; according to the technical scheme, the frequency that water needs to be supplemented to the humidifying cup is reduced, the use experience of a user is greatly improved, the humidity of pressurized air entering the adsorption barrel is greatly reduced, the phenomenon that an adsorbent is agglomerated due to humidification is improved, the service life of the adsorption barrel is prolonged, and the use cost of the user is reduced.

The invention belongs to the technical field of gas separation, and particularly relates to a zero-gas-consumption PSA (Pressure Swing Adsorption) air separation nitrogen-making device which comprises an adsorption tower, a top cover, a gas outlet pipe, a gas inlet pipe and an electromagnetic valve, the protection mechanism is arranged at the joint of the adsorption tower and the top cover; the back flushing mechanism is arranged at the upper end of the adsorption tower; the blocking mechanism comprises a blocking part arranged in the air outlet pipe, an abutting part is arranged on the blocking part, an adjusting part is arranged on the abutting part, and the pressure generated by the abutting part on the blocking part is adjusted by twisting the adjusting part; wherein the protection mechanism comprises an outer shell, the outer shell is composed of two shell bodies, reinforcing parts are annularly distributed in the outer shell, and warning parts and linkage parts are arranged on the reinforcing parts. According to the invention, a high-efficiency zero-gas-consumption air separation nitrogen production process can be realized; and meanwhile, good safety protection measures are taken, and the situation of gas leakage is reduced.

The invention discloses a zero-carbon glass kiln process. A system required by the process comprises a photovoltaic power generation device, an air separation device, a water electrolysis hydrogen production device, a mixer, a methanation device, a waste heat boiler I, a reforming device, a glass kiln, a waste heat boiler II and a dust removal and desulfurization device. Green oxygen, green nitrogen and green hydrogen are produced through green electricity driving; the flue gas of the glass kiln is cyclically enriched into high-concentration carbon dioxide (95.0 v% or above), the high-concentration carbon dioxide and green hydrogen are subjected to a methanation reaction to produce methane, and the methane, the carbon dioxide and water vapor are subjected to a reforming reaction to produce carbon monoxide and hydrogen; carbon monoxide and hydrogen are used as fuel of the glass kiln, green oxygen and carbon dioxide are mixed to form carbon-based oxygen-enriched combustion which is used as a combustion improver of the glass kiln, carbon-based oxygen-enriched combustion of the glass kiln is carried out, and redundant carbon dioxide is sold. According to the invention, the purposes of greenness, energy conservation, almost no nitrogen oxide and zero carbon are realized.

The invention relates to the technical field of crushing equipment, and discloses a lucid ganoderma crusher which comprises a base which serves as a basic component of the whole device and is used for assembling and bearing all treatment mechanisms and subordinate structural components of the treatment mechanisms. The treatment barrel is arranged in the middle of the top end of the base and is used for collecting and treating the lucid ganoderma. By adding and arranging the pretreatment mechanism, the mechanism pretreats the lucid ganoderma before crushing treatment by adopting high-temperature steam, on one hand, the high temperature of the steam can enable biological macromolecules such as microorganisms and nucleic acid on the surface and in the lucid ganoderma to be denatured, so that the biological macromolecules lose activity, the sterilization and disinfection effects are achieved, and the product quality and safety are improved; and on the other hand, the moisture and heat effect of the steam can soften and expand pectin, cellulose and other substances in cell walls and intercellular substances of the ganoderma lucidum, so that the texture of the ganoderma lucidum becomes softer, and the unnecessary material loss in the crushing process is reduced.

The invention discloses an air purifier with breathing and oxygen generation functions, and relates to the technical field of air purification equipment. The placing box is arranged on the other side of the upper surface of the moving plate, and an oxygen generator is arranged on the middle side in the placing box; the filter box is arranged in the placement box; the connecting mechanism is arranged on the supporting plate, the connecting mechanism is connected with the connecting box, a mounting plate is fixed to one side wall of the connecting box, a liquid medicine box and a storage box are arranged on the mounting plate, and the liquid medicine box is communicated with the connecting box through a conveying pipe; the lower end of the vertical pipe of the oxygen pipe is connected with the air outlet end of the oxygen generator through a connecting pipe; the respirator is communicated with the connecting box through a telescopic pipe; a protective cover sleeves and is fixed on the pipeline at the air inlet end of the sucking pump, the protective cover abuts against the top wall of the filter box, and a filter element is embedded in the protective cover; the exhaust mechanism is arranged on the upper side in the placing box; in the air purification process, the corresponding oxygen uptake operation can be selected according to requirements, and the occupied space is reduced while the purchase cost is not increased.

The invention belongs to the technical field of separation membrane preparation, particularly relates to a device and a method for preparing a separation membrane for hydrogen production by electrolysis of water, and aims to solve the problems that multiple raw materials need to be preliminarily mixed in the preliminary mixing process of separation membrane preparation raw materials, and the multiple raw materials cannot be uniformly mixed easily by the existing preparation device, so that the separation membrane preparation cost is low. In order to make unmixed slurry tiled above a bearing membrane and reduce the use effect of the produced separation membrane, the invention provides the following scheme that the device comprises U-shaped tool moving frames, one sides of the two U-shaped tool moving frames are connected with the same tool preparation plate through bolts, and a mixing module is arranged on the upper side of the tool preparation plate. According to the device and method for preparing the separation membrane for hydrogen production by electrolysis of water, when multiple raw materials are mixed, the multiple raw materials are uniformly mixed, non-uniform mixing of the raw materials is avoided, and the use effect of the prepared and produced separation membrane is improved.

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

The present invention belongs to the technical field of coking production, and in particular relates to a coke oven heating system adopting oxygen-enriched combustion. The coke oven heating system is characterized by comprising an oxygen producing unit, a coke oven heating unit, a flue gas treatment unit and a heat recovery unit, wherein an oxygen-deficient outlet of the oxygen producing unit is connected to the heat recovery unit, an oxygen-enriched outlet of the oxygen producing unit is connected to the coke oven heating unit, and a flue gas outlet of the coke oven heating unit is in communication with the flue gas treatment unit; the coke oven heating unit is connected to a fuel gas pipeline; and a return pipeline is further provided at a flue gas outlet of the coke oven heating unit and is connected to an air inlet of the oxygen producing unit. The present invention has the following beneficial effects: in the coke oven heating system, oxygen-enriched gas is used as the combustion-supporting gas of a coke oven, and main components of waste gas after combustion are carbon dioxide and water vapor which are both polar triatomic molecules having a relatively strong radiation capability, such that the radiation intensity in a combustion chamber of the coke oven can be increased, the radiation heat transfer efficiency in the combustion chamber is improved, and the coking time is shortened.

The invention discloses an air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with a pressure curve, and relates to the technical field of intelligent pollution discharge. The air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with the pressure curve comprises the following steps: S1, collecting running state data in real time, and preprocessing the running state data; s2, performing pressure disturbance intensity analysis on the operation state data; s3, performing real-time analysis and feature extraction on the pressure curve; s4, performing start-stop risk prediction on the operation state data; and S5, integrating the operation state data, the pressure disturbance intensity analysis result and the start-stop risk prediction result to execute a pollution discharge control instruction. The problems that an air compressor and a pressure swing adsorption system lack linkage control based on pressure change, pollution discharge easily causes pressure fluctuation and frequent starting and stopping, energy consumption is increased, equipment abrasion is caused, and an existing control mode lacks a feedforward adjusting mechanism are solved.

A process for purifying a helium containing stream, including introducing a feed gas stream into a first membrane separation unit, thereby producing a first permeate stream, and a first residue stream. Introducing the first permeate stream into a first dehydrogenation unit, thereby producing a first dehydrogenated gas stream. Introducing the first dehydrogenated gas stream into a second membrane separation unit, thereby producing a second permeate stream, and a second residue stream. Introducing the second permeate stream into a second dehydrogenation unit, thereby producing a second dehydrogenated gas stream. And introducing the second dehydrogenated gas stream into a helium pressure swing adsorption unit, thereby producing a product helium stream, and a helium-lean stream. Wherein the product helium stream contains more than 99.9% mol helium, and less than 0.1% mol hydrogen.

The invention belongs to the field of release membranes and preparation thereof, and particularly relates to an enhanced methane separation composite membrane and a preparation method thereof. The composite membrane sequentially comprises a carrier layer, a middle layer and a surface skin layer which are organically combined to form a whole, the carrier layer is a polytetrafluoroethylene porous membrane, the middle layer is composed of nanoscale inorganic particles, and the surface skin layer is a block polymer resin layer. The preparation method comprises the following steps: carrying out ultrasonic-assisted cleaning on a polytetrafluoroethylene porous membrane in a mixed solution of ethanol and water in sequence, and then treating with a sodium naphthalene solution; dipping the obtained carrier layer in a precursor-containing solution, and carrying out hydrothermal reaction to realize in-situ generation of a middle layer in the carrier; and placing the obtained product in a resin solution, keeping for a certain time under a certain vacuum degree, and then drying to obtain the target product enhanced methane separation composite membrane. The composite membrane is uniform in surface, uniform in thickness, good in mechanical strength and high in stability, the gas permeation flux of the composite membrane is equivalent to that of a methane separation membrane prepared by a traditional method, but the gas separation selectivity of the composite membrane is ideal.

High entropy alloy catalysts may be used for production of hydrogen. An example method of hydrogen production may include: introducing a hydrocarbon to a reactor, wherein the reactor contains therein a catalyst, wherein the reactor is substantially absent of oxygen and water, wherein the catalyst comprises a high entropy alloy and a catalyst support, wherein the catalyst is present in a form of a first plurality of particles, wherein the first plurality of particles is submicron-sized, wherein the high entropy alloy has an entropy, S, such that S≥12.47 J K−1 mol−1, and wherein the high entropy alloy comprises at least five of: iron, cobalt, manganese, nickel, molybdenum, copper, zinc, titanium, chromium, vanadium, aluminum, gallium, ruthenium, rhodium, palladium, silver, indium, tungsten, rhenium, iridium, platinum, gold, and bismuth; and reacting the hydrocarbon over the catalyst to produce solid carbon and hydrogen gas.