411results about "Specific gas purification/separation" patented technology

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 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.

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.

The application relates to the technical field of film materials, in particular to a mixed matrix membrane and a preparation method and application thereof. Toluene is added into a viscous polyamine acid solution, the temperature is increased to 200-250 DEG C, and stirring reaction is carried out for 5-8 hours, then the precipitate is obtained through centrifugation, the precipitate is washed with methanol for 3-5 times, and the product COOH-PI is obtained through drying; zinc nitrate hexahydrate and 2-methyl imidazole are dissolved in methanol, stirring reaction is carried out at room temperature for 3-8 hours, then the product is taken out and centrifuged, the product is washed with anhydrous methanol for 3-5 times, and ZIF-8 is obtained through drying; NH2-ZIF-8 is synthesized by using the same method; COOH-PI is added into DMF and stirred to obtain a PI solution, ZIF-8 and NH2-ZIF-8 are respectively added into DMF, and MOF suspension is obtained through ultrasonic treatment for 2-5 hours, then the MOF suspension is added into the PI solution, stirring is carried out at room temperature for 24-36 hours, the casting solution obtained is poured into a flat and clean glass plate, heating is carried out at 60-65 DEG C for 24-48 hours, then the formed membrane is dried to obtain the mixed matrix membrane. The preparation condition of the mixed matrix membrane is mild, the stability of the membrane is obviously improved, and the mixed matrix membrane has high selective permeability to helium.

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.

A method of treating a gas stream that includes: performing a first pressure swing adsorption (PSA) process generating a first H2-product gas and a first PSA tail gas from a first feed gas, the first PSA tail gas including a residual H2 and CO2; separating CO2 from the first PSA tail gas using a CO2 selective membrane, generating a CO2-rich permeate gas and a CO2-lean rejected gas; performing a second PSA process generating a second H2-product gas and a second PSA tail gas from a second feed gas, the second PSA tail gas including another residual H2; mixing the CO2-lean rejected gas and the second PSA tail gas to generate a mixed tail gas; and separating the residual H2 and the another residual H2 from the mixed tail gas using an H2 selective membrane, generating a recovered H2 permeate gas and a final rejected gas.

A device and a method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water are provided. The device comprises an oxygen purifying system, a heat exchange system, an air separation compression and expansion system, an air separation rectification system and a liquid oxygen storage system. The method comprises the following steps: first, purifying oxygen prepared by electrolyzing water by green electricity to remove impurities such as hydrogen, carbon monoxide, carbon dioxide and water in the oxygen, then feeding the pure oxygen into the heat exchange system, performing heat exchange liquefaction to obtain liquid oxygen, coupling the liquid oxygen generated by rectification of the air separation rectification system, and obtaining pressurized oxygen through the heat exchange system and the air separation compression and expansion system.

In a process in which ammonia is cracked to form a hydrogen gas product and an offgas comprising nitrogen gas, residual hydrogen gas and residual ammonia gas, residual ammonia is recovered from the offgas from the hydrogen recovery process by partial condensation and phase separation, and hydrogen is recovered from the resultant ammonia-lean offgas by partial condensation and phase separation. The recovered ammonia may be recycled the cracking process and the recovered hydrogen may be recycled to the hydrogen recovery process to improve hydrogen recovery from the cracked gas. Overall hydrogen recovery from the ammonia may thereby be increased to over 99%.

The invention relates to the technical field of portable oxygen production equipment, and particularly discloses an adsorption device for a portable oxygen generator, the adsorption device comprises a portable machine shell and an adsorption mechanism, the portable machine shell is provided with an air inlet through hole and an air outlet through hole, the adsorption mechanism comprises an oxygen-enriched element, the portable machine shell is provided with an air supply pipe head, and the air supply pipe head is provided with an air outlet through hole. An airflow pipeline is connected between the oxygen-enriched element and the air supply pipe head; the oxygen enrichment device further comprises an air supply air pump located between the oxygen enrichment element and the air supply pipe head, an auxiliary air pipe, an auxiliary air valve and a humidity sensor, the auxiliary air valve is located on the auxiliary air pipe, one end of the auxiliary air pipe is connected with the airflow pipeline, and the connecting point is located between the oxygen enrichment element and the air supply air pump. The humidity sensor is used for detecting humidity in the airflow pipeline. According to the invention, the auxiliary gas pipe is connected in parallel beside the oxygen-enriched element, so that gas can enter the gas flow pipeline without passing through the oxygen-enriched element when water in the gas flow pipeline is removed, the water removal effect is relatively high, and the consumption of oxygen is relatively low.

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

The invention discloses an argon recovery system and method based on nano-catalysis and membrane separation synergy, the system comprises an argon pretreatment module, a nano-catalysis reaction module, a membrane separation synergy module and a rectification system, the pretreatment module removes particulate matters, oil and hydrocarbon impurities through a cyclone separator, an activated carbon adsorption tower and a precision filter; the nano catalytic module adopts a multi-tube fixed bed reactor, a Pt-CeO2-loaded carbon nanotube and ZSM-5 molecular sieve composite catalyst is arranged in the nano catalytic module, and CO and O2 are catalytically removed at the temperature of 180-220 DEG C; the membrane separation module realizes argon-nitrogen separation through a hollow fiber membrane group and a pressure swing adsorption unit which are connected in parallel, argon-rich gas is rectified and purified at-180 to-190 DEG C through a low-temperature rectifying tower, and nitrogen-containing gas at the tower top is returned to the membrane separation for circular treatment; the rectification system is integrated with a condensation evaporator, and tower top gas condensation and tower kettle liquid argon evaporation are simultaneously driven by a liquid nitrogen refrigerant, so that cold and heat coupling is realized; the system is provided with an intelligent control module to adjust the catalytic temperature, the membrane separation parameters and the reflux ratio in real time.

The application discloses a pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, relates to the intelligent blowdown technical field.The pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, comprising the following steps: S1, real-time acquisition operation state data, and pretreatment is carried out to operation state data;S2, operation state data is analyzed to pressure disturbance intensity;S3, through real-time analysis and feature extraction to pressure curve;S4, operation state data is predicted to start-stop risk;S5, comprehensive operation state data, pressure disturbance intensity analysis result and start-stop risk prediction result execute blowdown control instruction.The air compressor and variable pressure adsorption system lack linkage control based on pressure change, blowdown is easy to cause pressure fluctuation and frequent start-stop, which leads to energy consumption increase and equipment wear, and the existing control mode lacks feedforward regulation mechanism.

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 invention belongs to the technical field of tail gas treatment, and relates to a device system and method for recovering helium from semiconductor process tail gas. By adopting a composite device system of an adsorption device, a membrane separation module, and a gas purification tower, it can complete the recovery and purification operations of low-concentration helium under the conditions of containing toxins, corrosion, and a mixture of multiple rare gases. The recovered helium can be purified to more than 99.999%. It has a high recovery rate, high purity, makes full use of heat exchange of the front and rear gases, has low energy consumption, and further broadens the helium supply source. The device system has no gas venting throughout the process, and all are refluxed, collected, and discharged back into the tail gas pipeline, and is applicable to various semiconductor processes.

The present application relates to a kind of textile gas setting machine of configuration oxygen-rich control wet energy-saving system, the oxygen-rich control wet energy-saving system, including: oxygen-rich oxygen generator, with the one-to-one correspondence setting of gas burner on the textile gas setting machine, for generating oxygen-enriched air;Three-way bypass and bypass valve, with the one-to-one correspondence setting of gas burner, one end is communicated the oxygen-enriched air outlet of oxygen-rich oxygen generator, the other end is communicated the pipeline between corresponding gas burner and gas access solenoid valve on textile gas setting machine;High-temperature humidity sensor, with the one-to-one correspondence setting of each air draft section of the air draft branch pipe on the textile gas setting machine, for obtaining the exhaust gas discharge humidity parameter of setting machine section;Variable frequency control induced draft fan, replace the induced draft fan corresponding to the air draft branch pipe;Controller, with the variable frequency control induced draft fan, high-temperature humidity sensor connection;With the starting switch of connected gas burner, the oxygen-rich machine vacuum pump frequency converter circuit connection.

The invention belongs to the field of helium extraction, and particularly relates to a hot spring associated helium extraction device and method. The device comprises an aeration inner cavity and an aeration outer cavity. The aeration inner cavity comprises a first cavity body, a plurality of nozzles arranged at the upper end of the first cavity body along the circumferential direction of the first cavity body, and a liquid inlet arranged at the lower end of the first cavity body and used for introducing thermal spring water. The aeration outer cavity comprises a second cavity body arranged on the outer side of the aeration inner cavity, a liquid outlet which is formed in the lower end of the second cavity body and is used for leading out thermal spring water, and a gas outlet which is formed in the top of the second cavity body and is used for leading out helium-containing gas. The device can efficiently separate out associated helium in thermal spring water, has the characteristics of small occupied area, low energy consumption and the like, and has a good application prospect in the field.

Provided are an apparatus and method for rapid cooling of a high temperature gas. The apparatus includes one or more cylindrical housings (001) connected to one another, a jacket (002) on an outer side of a housing, an inner cylinder (003) disposed at least in an interior of a first cylindrical housing, a heat insulation gasket (005), inner members (006), a corrosive high temperature gas inlet (N01) disposed on the heat insulation gasket (005), a gas and liquid phase outlet (N02) disposed at a bottom of the housing or a bottom of a last housing and a coolant inlet and outlet (N03-N05) connected to an interior of the jacket (002). The heat insulation gasket (005) seals the first cylindrical housing (001) and a top of the inner cylinder (003) in the interior of the first cylindrical housing (001). The inner members (005) are distributed along a wall of the housing (001), communicate an interior of the jacket (002) with an interior of the housing (001), and distribute a liquid in the interior of the jacket (002) to the interior of the housing (001). The method replaces a filter and a cooler and effectively reduces a risk of blockage when a solid-containing gas is cooled.

The present invention discloses a molecular sieve cartridge assembly and an oxygen concentrator, comprising a first molecular sieve cartridge, a second molecular sieve cartridge, a first air path plate and a second air path plate, the first molecular sieve cartridge having a first air port and a second air port; the second molecular sieve cartridge having a third air port and a fourth air port; the first air path plate is connected to the first air port and the third air port, the first air path plate is provided with an air source port and an exhaust port, the air source port is used to connect to an air intake source, the exhaust port is used to connect to the atmosphere, one of the first air port and the third air port is connected to the air source port, and the other is connected to the exhaust port; the second air path plate is connected to the second air port and the fourth air port, the second air path plate is provided with an oxygen exhaust port, and the second air port, the fourth air port and the oxygen exhaust port are connected to each other. The two molecular sieve cartridges of the present invention are connected through two air path plates, and the on-off between the air ports is controlled to achieve that one of the two molecular sieve cartridges is in a state of adsorbing nitrogen and the other is in a state of desorbing nitrogen. The structure of the present application is simple and reduces costs.

The invention relates to the field of catalyst preparation, and discloses a supported MnCo-based catalyst and a preparation method thereof, and a purification method of hydrogen-containing gas. The invention relates to a preparation method of a supported MnCo-based catalyst, which comprises the following steps: (1) carrying out hydroxylation treatment on a carrier, and then carrying out first drying and first roasting to obtain a hydroxylated carrier; and (2) reacting the hydroxylated carrier with a manganese precursor and a cobalt precursor in the presence of a solvent, and then carrying out second drying and optional second roasting. According to the preparation method, hydroxylation treatment and a chemical reduction method are combined to prepare the catalyst, the utilization rate of an active center is increased, and the purification effect of hydrogen-containing gas is improved.

The present disclosure relates to a pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and a hydrogen purification method using the same, and more particularly, the pressure swing adsorption apparatus of the present disclosure includes a plurality of adsorption towers including a pretreatment unit and a hydrogen purification unit wherein the adsorption towers of the pretreatment unit and the hydrogen purification unit are packed with different adsorbents, thereby achieving high purity hydrogen purification from mixed hydrogen gas produced after ammonia decomposition, making it easy to replace the adsorbent for ammonia removal, minimizing the likelihood that the lifetime of the adsorbent in the hydrogen purification unit is drastically reduced by a very small amount of ammonia, and actively responding to a large change in ammonia concentration in the raw material.Additionally, a hydrogen purification method using the pressure swing adsorption apparatus of the present disclosure physically adsorbs and removes impurities such as moisture (H2O), ammonia (NH3) and nitrogen (N2) included in mixed hydrogen gas produced after ammonia decomposition below extremely small amounts, thereby achieving high purity hydrogen purification with improved selective adsorption of moisture, ammonia and nitrogen and maximized hydrogen recovery rate and productivity. In addition, since the temperature swing adsorption process is not introduced, there is no need for a heat source for regeneration, thereby reducing the driving cost.

A method of separating hydrogen from a gas comprising helium includes receiving an input gas stream comprising hydrogen and helium and forwarding the input gas stream to at least one first membrane module comprising at least one first hydrogen-selective membrane for performing a first separation process for separating hydrogen, forwarding a first retentate from the at least one first membrane module to at least one second membrane module comprising at least one second hydrogen-selective membrane for performing a second separation process for separating hydrogen in the first retentate, providing a hydrogen stream comprising the first permeate and the second permeate from the at least one second membrane module and providing a helium stream comprising the second retentate from the at least one second membrane module. The disclosure includes a related method of extracting hydrogen and helium from a gas source and a related membrane module system.

An apparatus and process for drying a product gas for supplying the gas to a downstream user such that the product gas may be dried to remove water from the gas that may be absorbed or adsorbed during an initial start-up phase of production and / or delivery of the product gas (e.g., from a conduit that may have been exposed to water during installation). Therefore, the product gas can be delivered downstream to the user instead of being exhausted. Some embodiments may be configured to utilize a removable, mobile water redistribution device that may be completed during an initial start-up phase of product gas delivery and that provides a pipeline layout of product gas is transported to a new location after the product gas has been dried via an operation for an initial start-up period.

A carbon dioxide recovery system includes: an adsorber configured to adsorb and desorb carbon dioxide; a supply channel through which supply gas passes; a storage section configured to store carbon dioxide desorbed from the adsorber; and a gas supply section supplying carbon dioxide stored in the storage section to the adsorber. The carbon dioxide recovery system is operated in an adsorption mode, a desorption mode or in a desorption preparation mode. In the adsorption mode, the adsorber adsorbs CO2 contained in the supply gas supplied through the supply channel. In the desorption mode, the adsorber desorbs the adsorbed CO2, and the storage section stores CO2 desorbed from the adsorber. In the desorption preparation mode, the gas supply section supplies CO2 stored in the storage section to the adsorber during a time from an end of the adsorption mode to a start of the desorption mode.

Embodiments of the invention relate to methods, systems, and software for identifying and quantifying subsurface hydrogen, helium, carbon dioxide, or other fluids using multiple indicia from geophysical well logs, other wireline logging tools, or mudlogging tools.

A method for purifying a crude hydrogen feed stream utilizes an adsorbent having a N2 / Ar selectivity ranging from 2 to 4 at 30° C. and a Henry's law coefficient for argon ranging from 0.15 to 1.0 mmole / g / atma at 30° C. The composition of crude hydrogen streams from processes in which carbon dioxide is captured necessitates new criteria for adsorbent selection to improve recovery.

The invention relates to the technical field of molecular sieve oxygen generation, and provides medical antibacterial molecular sieve oxygen generation equipment which comprises a molecular sieve adsorption tower, an oxygen generation molecular sieve module, an automatic supporting module, an online replacement module, an air pump module and an oxygen storage tank. The oxygen generation molecular sieve module comprises a containing mesh enclosure, a first ultraviolet LED light source and a mesh cover plate, the automatic supporting module comprises a rotating shaft and a supporting piece, the supporting piece is fixedly arranged on the surface of the rotating shaft, the containing mesh enclosure can make contact with the supporting piece, and the online replacement module comprises a telescopic piece, a U-shaped frame, a replacement frame and a removal frame. The fixed end of the telescopic piece is fixedly connected with the molecular sieve adsorption tower, the n-shaped frame is fixedly connected with the movable end of the telescopic piece, the replacement frame and the removal frame are arranged in the replacement opening and the removal opening in a sliding mode respectively and used for sealing the replacement opening and the removal opening respectively, and the replacement frame and the removal frame are both fixedly connected with the n-shaped frame. The characteristics of small fluctuation of oxygen concentration and antibacterial effect are realized.

An embodiment of the present disclosure provides a production apparatus for high purity hydrogen, the production apparatus including: a decomposition reaction unit configured to decompose ammonia through ammonia decomposition reaction and discharge reaction products including hydrogen and nitrogen produced from the ammonia decomposition reaction and non-reacting ammonia; an adsorption refinement unit configured to discharge intermediate refined products by separating or removing ammonia from the reaction products; and a hydrogen separation membrane configured to discharge a high-purity hydrogen product by refining high-purity hydrogen by separating and filtering the intermediate refined products.