245results about "Specific gas purification/separation" patented technology

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 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 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.

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 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 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.

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.

The application relates to the technical field of oxygen generators, in particular to an oxygen generator with waste gas recycling structure, which comprises an outer shell body, an air inlet mechanism installed on the rear side of the outer shell body, a first mounting frame and a second mounting frame internally installed below the outer shell body, an oil-free air compressor connected above the first mounting frame, a filter connected above the oil-free air compressor, a waste gas treatment chamber for recycling waste gas symmetrically installed below the second mounting frame, a gas uniform dispersion assembly internally installed on the right side of the waste gas treatment chamber, an intermittent air inlet control assembly internally connected in the middle of the waste gas treatment chamber, and a first adsorption assembly and a second adsorption assembly sequentially installed on the left side of the waste gas treatment chamber from right to left. The oxygen generator with the waste gas recycling structure can improve the purity of nitrogen in the recycled waste gas, facilitates the reuse of the purified waste gas, reduces energy consumption, improves the environmental protection performance of the oxygen generator, and reduces the influence on the environment.

Processes and apparatuses for treating NOx from a carbon dioxide stream. Prior to separating carbon dioxide and NOx, NOx is converted to nitrogen gas in an NOx conversion zone, which may include an SCR reactor and / or CO boiler. A carbon separation zone which may include one or more fractionation columns produces a CO2 stream and an NOx stream. The NOx is passed back to the NOx conversion zone.

A production system, production method and application of general-purpose high-purity chemicals are disclosed. The production system includes a raw material tank, and an adsorption system, a crystallizer, a first light-impurity removal tower, a first heavy-impurity removal tower, a second light-impurity removal tower, a motorized tower, a second heavy-impurity removal tower, a vapor permeation device, a membrane separation system and a filling system connected with the raw material tank in sequence. The high-purity chemicals produced by the above system have high purity and excellent quality. Compared with the prior art, the system and method designed by the present disclosure have more pertinence, integrity, progressiveness, energy-saving, precision, high safety coefficient and great industrial promotion value. And the products produced are of excellent quality, which can meet the standards applied to the manufacturing of integrated circuit electronic components and meet the high-end needs of the semiconductor industry market.

The present application relates to the technical field of gas separation, in particular to a preparation method of CoPc-Mo composite hollow fiber membrane. The preparation method comprises the following steps: preparing a hollow fiber ceramic membrane; preparing a PDMS-Mo hollow fiber membrane; preparing CoPc-TFPN-COF and post-modifying carboxyl; and preparing a CoPc-Mo composite hollow fiber membrane. The present application prepares CoPc-TFPN-COF and modifies CoPc-TFPN-COF to obtain CoPc-TFPN-COOH. Compared with CoPc-TFPN-COF, the pore size of CoPc-TFPN-COOH is not much different, but CoPc-TFPN-COOH has a higher specific surface area, which makes CoPc-TFPN-COOH have the temperature resistance of CoPc-TFPN-COF while the maximum flux of helium reaches 288 GPU, so it performs more excellent in gas adsorption.

The invention relates to the technical field of nitrogen preparation, in particular to a nitrogen making device. The nitrogen making device comprises a bracket and a plurality of functional modules mounted on the bracket, wherein the plurality of functional modules at least comprise a damping module, a fireproof module and a sealing module; wherein the damping module is used for placing a component generating vibration, the fireproof module is used for placing an electrical component, and the sealing module is used for placing a nitrogen generation component. According to the nitrogen-making device provided by the invention, a part for generating vibration, an electrical part and a nitrogen-making part are divided into independent modules, so that the later maintenance operation is facilitated, the risk that other parts are easy to damage in the maintenance process is reduced, and the safety performance is improved.

Processes and apparatuses for treating NOx from a carbon dioxide stream. Prior to separating carbon dioxide and NOx, NOx is converted to nitrogen gas in an NOx conversion zone, which may include an SCR reactor and / or CO boiler. A carbon separation zone which may include one or more fractionation columns produces a CO2 stream and an NOx stream. The NOx is passed back to the NOx conversion zone.

To obtain a high concentration of hydrogen available to a hydrogen user on the side of the hydrogen user even if the concentration of hydrogen contained in hydrogen-containing gas supplied from a gas pipeline is low or unstable.SOLUTION: A hydrogen demand / supply management device is connected to a gas pipeline for supplying hydrogen-containing gas, supplies prepared hydrogen-containing gas having composition required by a hydrogen user, and comprises: a pipe for receiving the supply of the hydrogen-containing gas from the gas pipeline; a first separation part for generating high-concentration hydrogen gas from the hydrogen-containing gas; a pipe for sending low-concentration hydrogen gas generated in association with the generation of the high-concentration hydrogen gas in the first separation part, to the gas pipeline; a pipe for supplying the low-concentration hydrogen gas generated in association with the generation of the high-concentration hydrogen gas in the first separation part, to a hydrogen utilization facility of the hydrogen user; a pipe for sending the high-concentration hydrogen gas to the gas pipeline; a pipe for supplying the high-concentration hydrogen gas to the hydrogen utilization facility; and a pipe for supplying the high-concentration hydrogen gas to the first separation part.SELECTED DRAWING: Figure 3

A method of more stably synthesizing methanol from a gas containing carbon dioxide and sulfur compounds, such as blast furnace gas. The method includes: a water addition process of adding water to a feed gas G01; a hydrolysis process of hydrolyzing carbonyl sulfide contained in obtained hydrated feed gas into hydrogen sulfide and carbon dioxide; a water-gas shift reaction process of converting carbon monoxide and water contained in obtained hydrolyzed gas into carbon dioxide and hydrogen; a carbon dioxide gas separation process of separating obtained shift reaction gas into carbon dioxide gas and gases of components other than carbon dioxide; a desulfurization process of removing at least hydrogen sulfide from hydrogen sulfide and carbonyl sulfide contained in the carbon dioxide gas to obtain a high-concentration carbon dioxide gas; a hydrogenation process of adding hydrogen gas to the high-concentration carbon dioxide gas; and a methanol synthesis process of reacting carbon dioxide and hydrogen contained in obtained methanol feed gas.

The invention discloses a helium-neon separation assembly for a fusion device, the helium-neon separation assembly comprises a first heat exchange device, a first cooling device, a second heat exchange device and a gas-liquid separator, the first heat exchange device is internally provided with a first flow channel and at least one second flow channel, the first flow channel selectively exchanges heat with the second flow channels, and the second flow channel selectively exchanges heat with the first cooling device; the first flow channel is suitable for circulating helium-neon mixed gas, a cooling cavity is formed in the first cooling device, a first heat exchange tube is arranged in the cooling cavity, an inlet of the first heat exchange tube is communicated with the first flow channel, the first cooling device is provided with a cooling inlet and a cooling outlet which are communicated with the cooling cavity, and the cooling outlet is communicated with one of the second flow channels; a third flow channel and a fourth flow channel which exchange heat with each other are arranged in the second heat exchange device, the third flow channel is communicated with an outlet of the first heat exchange pipe, the gas-liquid separator is provided with a medium inlet, a gas outlet and a liquid outlet, the medium inlet is communicated with the third flow channel, and the gas outlet is used for being connected with a fusion device.

The invention provides an ammonium acetate modified Li-LSX molecular sieve as well as a preparation method and application thereof. The preparation method of the ammonium acetate modified Li-LSX molecular sieve comprises the following steps: activating an LSX molecular sieve, immersing the activated LSX molecular sieve into an ammonium acetate solution, heating in a water bath, and calcining to obtain a crude product; and mixing the crude product with a lithium source solution, and carrying out lithium ion exchange at high temperature. The activated LSX molecular sieve is modified by using the ammonium acetate solution, so that the exchange rate of lithium ions to sodium ions can be remarkably improved, the accuracy of an SIII site of Li in a molecular sieve framework is ensured, and the nitrogen adsorption efficiency is improved; meanwhile, the method is simple in process and convenient to operate, and the production cost of the LSX molecular sieve with the high lithium ion exchange rate is remarkably reduced.