88 results about "Pressure swing adsorption" patented technology

This paper discloses a rapid cyclic pressure swing adsorption (PSA) method for separating O2 from N2 and / or Ar. The method uses a carbon molecular sieve (CMS) adsorbent with a driving force of 1 atma and 86 atma, as indicated by a linear driving force model. o F measures at least 5% O2 / N2 and / or O2 / Ar kinetic selectivity and at least 0.2000% O2 adsorption rate (1 / s).

The present application relates to a kind of six-tower pressure swing adsorption capture carbon dioxide in calcination furnace flue gas method, comprising: adsorption stage;First equalization;Second equalization;Order release stage;Reverse release stage;Flushing stage;Final rise stage, 6 towers are sequentially staggered timing according to 1~6, each interval switches once process, form continuous operation system, core logic is attached to carbon capture "adsorption enrichment, desorption recovery" core demand, give consideration to purity and recovery rate, ensure industrial waste gas continuous input, product continuous output, by controller automatically adjusts each process time, guarantee system stable operation.The present application ensures industrial waste gas continuous input, product continuous output, carbon capture regulation is flexible, energy-saving effect is remarkable, multiple tower operation stability is strong, integration degree is high and environmental protection benefit is remarkable, compact structure, small footprint, reduce greenhouse gas emissions, give consideration to environmental protection requirement and economic benefit.

This invention pertains to the field of hydrogen energy, specifically a high-carbon, low-hydrogen pressure swing adsorption (PSA) purification process system and method. The system, along the gas flow direction, sequentially includes a carbon-based conversion unit, a heat exchange-cooling-gas-liquid separation unit, a compressor, at least two switchable decarbonization and desulfurization towers, a fine desulfurization tower, a PSA unit, a desorbed gas buffer tank, a desorbed gas compressor, and a fuel gas tank. This invention increases the hydrogen fraction in the feed gas from 30-50% to 50-70% through carbon-based conversion, then removes total sulfur to ≤0.1ppm through multi-stage desulfurization and decarbonization, finally producing fuel cell-grade hydrogen with a purity of ≥99.97% via PSA. Simultaneously, the desorbed gas is pressurized, buffered, and then divided into two stages for reuse. This invention effectively improves hydrogen recovery rate and desorbed gas utilization rate, solving the problems of high energy consumption and adsorbent poisoning in the purification of high-carbon, low-hydrogen by-product gases. It is applicable to various feed gases such as coke oven gas, refinery gas, and methanol tail gas.

The present application relates to a process for producing synthetic ammonia by using hydrogen-containing tail gas, comprising the following steps: S1: sodium cyanide tail gas is pressurized, then heated and water-cooled. S2: the impurity-removed tail gas is desulfurized. S3: the desulfurized tail gas is mixed with chlor-alkali tail gas, the mixed gas is heated and deoxidized. S4: the deoxidized tail gas is pressurized and enters a PSA (pressure swing adsorption) device for pressure swing adsorption treatment, obtaining high-purity hydrogen. In the PSA device, dehydrating, carbon dioxide, methane, carbon monoxide and nitrogen adsorbents are sequentially arranged. The carbon dioxide adsorbent is activated carbon modified by carbonate and strong alkali, and the nitrogen adsorbent is 13X zeolite molecular sieve modified by Na + and Ba 2+ and Ca 2+ ion exchange. S5: nitrogen reacts with the high-purity hydrogen obtained in step S4 to generate ammonia. The present application can improve the adsorption capacity of the adsorbent for impurity gas, thereby reducing the replacement frequency of the adsorbent, prolonging the service period and service life of the adsorbent, and improving the production efficiency.

The application is suitable for the technical field of chemical waste gas treatment, and provides a low-energy-consumption hydrogen peroxide production waste gas deep treatment process and device, wherein the low-energy-consumption hydrogen peroxide production waste gas deep treatment process comprises the following steps: S1, constructing a first evaluation model: constructing according to the ratio of the temperature difference between the inlet and outlet of the condenser and the energy consumption of the refrigerating machine, the pressure fluctuation variance of the pressure swing adsorption unit and the pressure fluctuation frequency of the pressure swing adsorption unit; outputting a device health comprehensive index through the first evaluation model; S2, constructing a second evaluation model: constructing according to the collected recovery hydrogen flow, the unit waste gas treatment quantity power consumption, the change rate of the oxygen content and the concentration ratio; outputting an energy efficiency economic comprehensive index through the second evaluation model. In the application, when the system efficiency comprehensive index is lower than a preset threshold value, the optimization condensing temperature is outputted by the regulation and control model, so as to avoid the refrigeration overload or insufficient treatment caused by the traditional fixed temperature setting value under the environmental temperature fluctuation.

The application discloses an energy-saving nitrogen production equipment and method with pressure swing adsorption function, and relates to the technical field of nitrogen production. The application comprises a nitrogen production tank, further comprises a partition disc and a top sealing disc fixedly installed in the nitrogen production tank, and a partition plate fixedly installed between the partition disc and the top sealing disc for partitioning the nitrogen production tank into a first nitrogen production area and a second nitrogen production area; the first nitrogen production area and the second nitrogen production area are both provided with a nitrogen production assembly; a pressure swing adsorption unit comprises a gas guiding assembly and a pressure increasing assembly; and an equalizing desorption unit comprises a gas storage assembly and a stamping assembly. The application has the advantages that the alternate operation of the first nitrogen production area and the second nitrogen production area can effectively improve the production capacity, the gas flow direction can be flexibly controlled during the nitrogen production, the oxygen and nitrogen separation effect is enhanced by self-pressurization, the gas production efficiency is improved, the residual pressure energy can be recycled and utilized to realize the equalization of the pressure of the first nitrogen production area and the second nitrogen production area, the discharge of the oxygen-rich tail gas is accelerated in the pressure relief stage, the operation energy consumption is effectively reduced, and the energy-saving effect is remarkable.

Disclosed herein is an apparatus and method for providing a direct air capture (DAC) system of carbon dioxide to improve the energy efficiency, operability, and economic performance of DAC technologies based on multiple types of methods, including thermal swing adsorption (TSA), pressure swing adsorption (PSA), and moisture swing adsorption (MSA). In particular, disclosed herein is a DAC apparatus comprising a first water extraction unit, a process unit comprising a second water extraction unit, a carbon dioxide capture unit, and a water release unit. The present invention also provides a logic control system for a preconditioner of the proposed DAC apparatus, comprising a controller and one or more control elements in communication with a fluid stream, wherein the controller is configured to adjust the temperature, water content, or a combination thereof of the second fluid stream, the third fluid stream, or both to a predetermined range based on the cost of capturing carbon dioxide on a net removal basis.

The application provides a high-temperature pressure swing adsorption pure oxygen production equipment, which comprises a filter, an inlet of the filter is connected with an air pipeline, an outlet of the filter is connected with an inlet of a blower, an outlet of the blower is connected with an inlet of an air buffer tank, the blower is connected with a frequency converter, an outlet of the air buffer tank is connected with a first inlet of an adsorption tower, a second inlet of the adsorption tower is connected with an outlet of an oxygen back flushing tank, an outlet of the adsorption tower is connected with an inlet of a vacuum pump, an inlet of the oxygen back flushing tank is connected with an outlet of an oxygen buffer tank, the oxygen buffer tank is connected with an oxygen analyzer or a chromatograph and an oxygen flow meter, an outlet of the oxygen buffer tank is connected with an air outlet pipeline, and an outlet of the vacuum pump is connected with the air outlet pipeline. The application uses the principle of pressure swing adsorption, proposes a novel pressure swing adsorption process and equipment, breaks through the limitation of product oxygen purity, and obtains oxygen with a purity of ≥99.5%, thereby expanding a new application field of the pressure swing adsorption oxygen production process.

The application discloses a three-tower series connection pressure swing adsorption device and a pressure equalization process thereof, adopts a set of pressure swing adsorption device, sets a multi-step series connection pressure equalization process, and adopts a three-tower simultaneous adsorption mode, so that the yield is obviously improved, the energy consumption and equipment investment are reduced, and the product gas quality is guaranteed. The three-tower series connection pressure swing adsorption device is used for pressure swing adsorption hydrogen extraction, the product hydrogen yield is obviously higher than that of an existing first-stage pressure swing adsorption hydrogen extraction device under the premise that the product hydrogen purity and impurity content meet high-purity hydrogen requirements, the three-tower series connection pressure swing adsorption device is used for pressure swing adsorption oxygen production and nitrogen production, and unit oxygen production power consumption and unit nitrogen production power consumption are obviously lower than the minimum index requirements in related standards under the premise that oxygen purity and nitrogen purity meet basic parameter requirements.

The application discloses a kind of organic silicon waste gas multistage collaborative management method and system, the method includes: S1: the organic silicon production waste gas is guided into balance bin and carries out airflow balance and pressure stability control;S2: after dust removal, waste gas is sequentially introduced into first-stage cooling heat exchanger, second-stage condenser and third-stage deep freezer, and high-boiling siloxane, chloromethane and condensable volatile organic compounds are recovered by fractional condensation;S3: after deep cooling, non-condensable gas is introduced into pressure swing adsorption unit, and residual chloromethane is adsorbed and enriched, S4: after pressure swing adsorption, gas is introduced into acid removal and resource utilization unit;S5: after demisting and dewatering, gas enters hydrophobic zeolite rotary wheel for adsorption and concentration, and the obtained high-concentration desorption gas enters regenerative catalytic combustion reactor for catalytic oxidation treatment.The application improves the segmented treatment and resource recovery effect of chlorine-containing components in organic silicon waste gas through the synergistic cooperation of steady flow dust removal, fractional condensation, adsorption reflux, acid removal and resource utilization, adsorption concentration and catalytic oxidation.

This invention relates to the field of gas separation technology and discloses a pressure swing adsorption (PSA) purification process for low-concentration CO2 resistant to impurity interference, comprising the following steps: S1: Adsorption step: The raw gas containing impurities and CO2 is passed into a main adsorption tower containing a composite adsorbent under adsorption pressure, so that CO2 is selectively adsorbed to obtain purified tail gas; S2: Regeneration step: The main adsorption tower is regenerated, including: S2.1: Pressure equalization and depressurization: The gas in the main adsorption tower is released to recover pressure energy; S2.2: Vacuuming: Vacuum desorption is performed on the main adsorption tower to obtain CO2 product gas; This invention uses a composite adsorbent with a gradient structure, whose hydrophobic outer shell effectively blocks moisture erosion, and the inner layer preferentially chemically fixes SO2. x NO x It removes acidic impurities, thereby protecting the core amine sites from highly selective CO2 adsorption and significantly improving its resistance to poisoning and long-term stability under complex flue gas conditions.

The utility model discloses a kind of cyclic treatment systems of silane gas decomposition tail gas in polysilicon production, including at least one group by adsorption tower and analysis tower composition pressure swing adsorption device, the gas inlet end of pressure swing adsorption device is equipped with tail gas compressor, tail gas compressor connects the tail gas outlet of silane gas decomposition device, the product gas outlet end of pressure swing adsorption device is equipped with adsorption product gas tank, adsorption product gas tank is connected to silane gas decomposition device by circulating hydrogen pipe, the pressure relief end of pressure swing adsorption device is connected to cold hydrogenation device.The utility model utilizes the principle of pressure swing adsorption to separate and impurity removal hydrogen in silane gas decomposition tail gas, obtained product hydrogen and pressure relief gas can be used as circulating hydrogen and cold hydrogenation device respectively, without material waste, the setting of tail gas compressor and adsorption product gas tank can guarantee the stability of system control and circulating hydrogen recovery.

This invention provides a method for preparing a wood-based monolithic carbon molecular sieve and its application in nitrogen and oxygen separation. The wood-based monolithic carbon molecular sieve is obtained by primary carbonization, impregnation modification, and secondary carbonization of natural wood. The modifier includes a rigid nitrogen-containing heterocyclic aromatic compound. The process follows a simple route of "primary carbonization to construct the framework – organic molecule impregnation – secondary carbonization deposition to adjust the pore size," requiring no external binder. The carbon deposition generated by the pyrolysis of the modifier at high temperature effectively and controllably reduces the micropore size of the wood-based porous carbon, adjusting it to a size range with ideal kinetic sieving effect for nitrogen and oxygen molecules. The resulting monolithic carbon molecular sieve exhibits a significant difference in diffusion rates for oxygen and nitrogen, demonstrating high oxygen / nitrogen kinetic separation selectivity, making it suitable for efficient pressure swing adsorption (PSA) nitrogen and oxygen separation processes. It offers potential advantages such as low energy consumption, high efficiency, good material strength, and long service life for air separation for nitrogen production or oxygen enrichment.

The utility model relates to industrial gas separation and purification equipment technical field especially relates to a control system of preventing pressure swing adsorption bed layer fluidization, including raw material gas inlet main pipe, product gas discharge main pipe and a plurality of adsorption purification devices, and adsorption purification device contains raw material gas inlet branch pipe, adsorption tower, product gas discharge branch pipe, and the control system still includes the pressure cylinder of adsorption tower top, pressure sensor and process control regulating valve on product gas discharge branch pipe, the forward depressurization branch pipe and pressure equalizing orifice plate of intercommunication adjacent device. The utility model eliminates fluidization space through the pressure cylinder compaction adsorbent top surface, and process control regulating valve and pressure equalizing orifice plate cooperate and regulate and control pressure difference and flow velocity, solve the adsorbent fluidization pulverization in the operation of pressure swing adsorption device, pipeline vibration and the problem of high cost and high failure rate of existing control scheme, be applicable to all pressure swing adsorption device, especially to large -scale pressure swing adsorption device of low hydrogen raw material gas or macromolecular weight product gas, the effect is particularly remarkable.

The utility model discloses a kind of pressure swing adsorption desorption gas recovery systems, technical scheme is as follows: including ammonia's PSA device, the desorption gas generated by PSA device is divided into two ways by desorption gas pipe, one way is sent to purification conversion preheating furnace by conversion pipe, another way is vented to flare combustion by vent pipe, the conversion pipe is mixed with the TSA regeneration gas of purification synthetic section by bypass's mixing pipe, the gas after mixing is sent to coking furnace using by back furnace gas pipeline, a kind of pressure swing adsorption desorption gas recovery system provided in the present application is sent to coking furnace using by mixing desorption gas with TSA regeneration gas, while optimizing adsorption tower structure and strengthening pipeline control, effectively solve the problem that desorption gas utilization rate is low in prior art, adsorption efficiency is poor and pipeline safety hidden danger, with the advantages of improving energy recovery rate, enhancing separation effect and guaranteeing system safe operation.

This invention belongs to the field of biochar gasification hydrogen production technology, specifically designing a method and apparatus for preparing high-purity hydrogen, including the following steps: S1, a mixture of biochar and sodium borate is fed into the apparatus for crushing, drying, and preheating; S2, the mixture from step S1 is fed into a reaction chamber, and carrier gas and steam are introduced for a high-temperature reaction, yielding a mixed gas and solid waste; S3, the mixed gas from step S2 is passed through a gas-solid separator and a pressure swing adsorption device, finally reaching a hydrogen-rich collection device to obtain high-purity hydrogen; S4, the solid waste from step S2 is fed into a waste residue treatment tank, and after heating treatment, regenerated sodium borate is generated. The regenerated sodium borate and biochar are then taken out and fed back into the apparatus for recycling. This invention uses biochar as raw material and couples it with a sodium borate recycling process, offering advantages such as high hydrogen purity, low carbon footprint, environmental friendliness, and sustainable operation, providing an efficient and feasible technical solution for biochar hydrogen production.

This utility model relates to the field of biosynthetic gas treatment technology, specifically disclosing a process system for the co-production of solid wax, liquid hydrocarbons, and hydrogen from biosynthetic gas Fischer-Tropsch synthesis. The system comprises a pretreatment system, a blower system, a compression system, a shift converter system, a desulfurization system, an MDEA decarbonization system, a PSA hydrogen extraction system, a desorbed gas compression system, a fine desulfurization and pressurization system, and a Fischer-Tropsch synthesis system, connected in sequence. This process system utilizes biosynthetic gas from the pyrolysis and gasification of municipal solid waste, producing solid wax, liquid hydrocarbons, and hydrogen through a combination of technologies including Fischer-Tropsch synthesis and pressure swing adsorption. This system converts organic matter in waste into high-value-added chemicals such as solid wax, liquid hydrocarbons, and hydrogen, achieving resource utilization and reducing environmental pollution. Furthermore, the process system can adjust the types and quantities of products according to market demand to maximize economic benefits.

This invention discloses a portable oxygen generator and method powered by human kinetic energy, relating to portable pressure swing adsorption (PSA) oxygen generation technology. The device includes a main energy-gathering module, a main unit module, an auxiliary energy-gathering module, and a control module. The main energy-gathering module generates a first gas source by directly compressing air through the impact of human limbs, while the auxiliary energy-gathering module recovers the kinetic energy of exhalation to generate a second gas source. The main unit generates oxygen through PSA in an adsorption tower, with no electrically powered booster components. The control module utilizes the dual rhythms of breathing and movement to achieve pulsed, on-demand oxygen production, with high-pressure gas generation during inhalation and low-pressure standby during exhalation. The main energy-gathering module employs a decoupled support-work structure, combining the rigid support of a walking stick with the pumping function. This invention requires no external power supply, has high energy utilization, and weighs ≤1.1kg. At an altitude of 5500m and a walking frequency of 30 steps / minute, it stably outputs 2L / min of 90% oxygen, suitable for various scenarios such as high-altitude mountaineering and wilderness emergencies.

This invention discloses a green and energy-saving formaldehyde production system and method. Methanol is fed into a methanol buffer tank, then sequentially preheated in a dehydrogenation feed preheater, a dehydrogenation evaporator, and a first preheater to 210-260°C. After being heated, it enters the dehydrogenation reactor for a dehydrogenation reaction in the presence of a catalyst. The reaction liquid sequentially enters the first preheater and the dehydrogenation feed preheater to recover heat, and then sequentially enters a condenser and a dehydrogenation separator for gas-liquid separation. The liquid phase sequentially enters a preheater, a dryer, a light tower, and an aldehyde tower for separation to obtain formaldehyde product. The remaining liquid enters an alcohol tower to recover formaldehyde. The gas phase sequentially enters a dehydrogenation condenser, a compressor, and a pressure swing adsorption unit to obtain hydrogen. This invention produces hydrogen as a byproduct, which is used as an energy output, making it a green and energy-saving production process. Furthermore, the addition of water vapor reduces the occurrence of side reactions such as dimethyl ether and carbon buildup.

This invention relates to an air separation oxygen generator using pressure swing adsorption (PSA) and temperature swing desorption (TSD). Along the air transport direction, the air separation oxygen generator includes an air compressor, a refrigerated dryer, and an air buffer tank connected in sequence. The air separation oxygen generator also includes a first adsorption device, a second adsorption device, a heat exchange device, and an oxygen buffer tank. The inlets of the first and second adsorption devices are respectively connected to the air buffer tank; the outlets of the first and second adsorption devices are respectively connected to the oxygen buffer tank. The first and second adsorption devices alternately perform adsorption and desorption. The heat exchange device is connected to the air compressor and includes a cold-side inlet and a hot-side outlet. The cold-side inlet is connected to the air buffer tank, and the hot-side outlet is connected to the outlets of the first and second adsorption devices, respectively. This invention utilizes the heat generated by the air compressor for temperature swing desorption, eliminating the need for a heating device and reducing energy consumption.

This invention belongs to the field of marine pressure swing adsorption (PSA) nitrogen generation equipment, specifically a high-efficiency marine nitrogen generation device. It includes an upper panel and a lower panel, which are respectively sealed to an upper housing and a lower housing. Multiple support rods are fixedly connected between the upper and lower panels. Multiple adsorption cylinders, communicating with the interiors of the upper and lower housings, are evenly spaced between the upper and lower panels. Each adsorption cylinder is detachably connected to both the upper and lower panels. Each adsorption cylinder contains a spiral baffle with a uniform pitch, and molecular sieve particles are filled in the spaces between the spiral baffles. The independently arranged multiple adsorption cylinders reduce space occupation while ensuring balanced nitrogen generation efficiency within each cylinder. Simultaneously, the spiral baffles reduce gas flow velocity, improving nitrogen generation efficiency while preventing wear and tear between the molecular sieve particles.

This invention provides a waste heat recovery device for a pressure swing adsorption (PSA) hydrogen purification equipment, including a purification conveying pipe, a heat collection tube inside the purification conveying pipe, a separation plate inside the heat collection tube, and a feeding trough inside the separation plate. The number of separation plates is set to multiple. This invention is rationally designed. By placing the heat collection tube inside the purification conveying pipe used for transporting hydrogen, the hydrogen can directly contact the heat collection tube. Simultaneously, the liquid inside the heat collection tube flows in a ring, allowing more hydrogen to come into contact with the liquid, increasing the heat absorption range. Furthermore, the heat-conducting strips can transfer heat from the outside to the inside of the liquid, improving the heat adsorption rate.

This utility model belongs to the field of carbon nanotube production technology, specifically relating to a pressure swing adsorption (PSA) separation device for tail gas in carbon nanotube production. The device includes two adsorption components, each comprising a housing, a cover, and several topless cages. The housing has a flange at the top; the cover is bolted to the flange; the topless cages are stacked within their respective housings; some of the topless cages contain several adsorbent packets; another portion of the topless cages contain several molecular sieve packets; each housing contains at least one topless cage containing an adsorbent packet and at least one topless cage containing a molecular sieve packet. This PSA separation device for tail gas in carbon nanotube production, by setting topless cages containing adsorbent packets and molecular sieve packets within the housings of the adsorption components, achieves simultaneous adsorption of multiple impurity gases in the tail gas, improving the purity of the separated and purified hydrogen, and meeting the demand for high-quality hydrogen in carbon nanotube production.

The application discloses a method for recovering alkanes from oilfield associated gas by decarburization, comprising the following steps: sequentially performing buffer treatment, dust and oil removal purification treatment and pressure swing adsorption decarburization separation on the oilfield associated gas to obtain decarburized oilfield associated gas and decarburization tail gas; performing vacuum desorption, buffer treatment and adsorption dealkylation separation on the decarburization tail gas to obtain dealkylated concentrated carbon dioxide gas and adsorption dealkylation decarburization gas; performing vacuum desorption, buffer treatment and compression treatment on the adsorption dealkylation decarburization gas to obtain compressed decarburization gas; then, performing compression treatment, drying and dehydration and low-temperature liquefaction separation on the compressed decarburization gas mixed with the decarburized oilfield associated gas to obtain purified oilfield associated gas and mixed hydrocarbon products. The method can realize decarburization purification and alkane recovery of the oilfield associated gas, the recovered mixed alkanes can be used for preparing liquefied petroleum gas and light oil, the purified oilfield associated gas can be directly sent to a pipe network for use by downstream users, and all components can be recycled and utilized, so that the product has high added value.

This invention discloses an economical and low-carbon dispatching method for an integrated energy system in the steel industry, considering the coupling of long and short processes and cogeneration of steel production. The method includes: constructing an integrated energy system architecture based on the steel production system, energy storage system, cogeneration system, and by-product gas treatment system; simultaneously, deploying an independent waste heat recovery boiler within the integrated energy system to recover waste heat from the by-product gas of the steel production system; constructing a long-short process coupled steel production system model for the steel production system integrating blast furnace-converter long-process and electric arc furnace short-process equipment; constructing a by-product gas treatment system model for the by-product gas treatment system integrating pressure swing adsorption hydrogen production unit, post-combustion carbon capture unit, and methanol synthesis unit; and establishing and solving an economical and low-carbon optimization model with the dual objectives of minimizing total cost and total carbon emissions to obtain the optimal dispatching scheme. The economical and low-carbon optimization model established in this invention balances economic and sustainability goals, combining electricity price responsiveness with a low-carbon orientation, providing a decision-making framework for the low-carbon transformation of steel enterprises.

The utility model relates to technical field of oxygen removal machine, especially based on oxygen removal machine of pressure swing adsorption technology, it not only saves the use of liquid medicine, utilizes pressure swing adsorption technology to the adsorption removal of oxygen, saves the production cost, and can detect the removal effect of oxygen, and the equipment operation condition is convenient to master, including gas sending mechanism, still including two groups of separation mechanism, detection mechanism and vacuum mechanism, two groups of separation mechanism all install on gas sending mechanism and carry out the adsorption to oxygen, and detection mechanism installs on separation mechanism and carries out the detection to oxygen content, and vacuum mechanism installs on separation mechanism and exports oxygen.

The application discloses a three-tower series connection pressure swing adsorption device and a displacement process. While ensuring that product gas of a difficult-to-adsorb component reaches the quality requirement of high-purity gas, the device can only adopt a first-stage pressure swing adsorption device, so that the product gas yield of the difficult-to-adsorb component reaches or exceeds the product gas yield of a second-stage or more than two-stage pressure swing adsorption device commonly used at present. Meanwhile, the device provided by the application can also obtain product gas of an easy-to-adsorb component with high purity and high yield.

The utility model discloses a multifunctional adsorption - rectification coupling purification device belongs to chemical industry separation technical field. Adsorption unit completes the preliminary separation of azeotrope, realizes the switching between material's up -in and down -out and down -in and up -out through the combination use between valve, utilizes system pressure controller (7) to realize the pressure swing adsorption to tubular reactor (4), changes the azeotrope after composition and enters rectifying column (8), is further separated to the new formation gas - liquid equilibrium component through rectification unit, realizes the separation and purification of azeotrope finally. The device combines the selectivity of adsorption and the high efficiency of rectification simultaneously, has the advantages such as simple process, wide use, big operation flexibility, energy -conserving and consumption -reducing.

This invention relates to a pressure swing adsorption (PSA) oxygen generator with adjustable oxygen purity, belonging to the field of oxygen generation technology. The technical solution includes an air compression filtration unit, a first transmission unit, an adsorption unit, a second transmission unit, a pure oxygen storage tank, an oxygen-enriched storage tank, a third transmission unit, and a desorption unit. The air compression filtration unit is connected to the adsorption unit via the first transmission unit; the pure oxygen storage tank and the oxygen-enriched storage tank are connected to the adsorption unit via the second transmission unit; and the desorption unit is connected to the adsorption unit via the third transmission unit. Beneficial effects: The oxygen generator of this invention offers advantages such as flexible switching of oxygen generation conditions, improved molecular sieve efficiency and service life, energy saving and efficiency enhancement, carbon dioxide emission reduction, improved thermal efficiency and nitrogen oxide emission control, high degree of automation, and high product purity and recovery rate. It is of great significance for promoting energy conservation, carbon reduction, and environmental upgrading of industrial furnaces and boilers.

A process for recovery of hydrogen from underground storage is provided. The process involves sending a hydrogen stream stored in an underground cavern to a pressure swing adsorption unit and then to an electrochemical compression unit to produce hydrogen having a purity of above 99.5 mol% to close to 100 mol%.