132results about "Specific gas purification/separation" patented technology

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 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).

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.

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 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 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 present disclosure relates to a process for isolation of He, comprising a) contacting a first gas separation membrane with a first gas stream comprising He and H2, thereby producing a second gas stream comprising He and H2; b) contacting the second gas stream with air under conditions sufficient to combust the H2, thereby producing a third gas stream comprising He; c) contacting a second gas separation membrane with the third gas stream, thereby producing a fourth gas stream comprising He.

This invention belongs to the technical field of oxygen generation equipment, specifically relating to an oxygen generation device that facilitates the replacement of molecular sieves. It includes a shell, a molecular sieve tower, and a movable plate. The molecular sieve tower is located inside the shell, and an installation groove is formed on the side wall of the shell at a corresponding position to the molecular sieve tower. The movable plate is located within the installation groove. An outlet pipe is connected to the top cover and fixedly installed on the shell. A first rack is fixedly installed on the sliding rod near the movable plate, and a second rack is fixedly installed on the lower part of the inner side of the movable plate. A gear is rotatably installed between the first and second racks on the shell. Both sides of the outer wall of the cylinder have protruding posts, and a locking claw is fixedly installed inside the movable plate. Its purpose is to allow for the disassembly / installation of the molecular sieve tower and the oxygen generation device by pulling / pressing the movable plate, and to allow for the opening and closing of the cylinder containing the molecular sieve through the detachable installation of the partition, thereby facilitating the replacement of the molecular sieve. The operation is simple and convenient.

Embodiments of the present invention relate to methods, systems, and software for identifying and quantifying hydrogen, helium, carbon dioxide, or other fluids underground using multiple indicators from geophysical well log logs, other wireline logging tools, or mud logging tools.

The present invention relates to a cryogenic process to produce crude helium from pretreated natural gas. The pretreated natural gas is processed in two flash stages using the helium free process stream as a stripping agent, and a distillation column with the identified operating conditions and process scheme to ensure 100% helium recovery with reduced capital and operating cost for producing the crude helium. The integration of the cryogenic process with the already known purification system to produce pure helium is demonstrated to ensure high helium recovery in a hybrid process.

The application provides a carbon capture system, a drying tower, a main heat exchanger, a spray tower device and a carbon capture liquid supply device; flue gas dewatered through the drying tower enters the main heat exchanger, the main heat exchanger performs precooling treatment on the flue gas, the precooling treated flue gas enters the spray tower device, is cooled by carbon capture liquid input into the spray tower device by the carbon capture liquid supply device in the spray tower device, carbon dioxide in the flue gas is cooled to the condensation temperature of the carbon dioxide to obtain dry ice, the dry ice is liquefied to obtain liquid carbon dioxide, and the liquid carbon dioxide passes through the main heat exchanger to obtain high-concentration liquid carbon dioxide. Through the carbon capture system provided in the application, the evaporation amount of the carbon capture liquid by the flue gas can be reduced.

The invention discloses a movable nitrogen making device for a coal mine, and relates to the technical field of nitrogen making. The movable nitrogen making device for the coal mine comprises a quick fixing mechanism. According to the movable nitrogen-making device for the coal mine, the vehicle body and the nitrogen-making device are always kept at the opposite horizontal positions through the quick fixing mechanism and the limiting effect of an insertion hole and a second limiting barrel, and when an oxygen-nitrogen separation piece and an air compressor are placed into a first limiting barrel and an outer box, the oxygen-nitrogen separation piece and the air compressor are separated through the combined effect of pressure and spring force; the arc-shaped extrusion plate and the strip-shaped extrusion plate are driven to be close to and press the oxygen-nitrogen separation part and the air compressor respectively, the oxygen-nitrogen separation part and the air compressor can be taken and placed rapidly, time is saved, when an obstacle road section is encountered, a vehicle body can move conveniently, and various mine tunnel transportation environments can be flexibly coped with.

The invention discloses an oxygen generator system and a control method, and the system comprises a compressor which is used for generating high-pressure hot air; the adsorption tower module comprises a heat exchange unit and a molecular sieve unit, the molecular sieve unit comprises a first molecular sieve tower and a second molecular sieve tower, the compressor is communicated with the heat exchange unit, and at least part of the heat exchange unit is located between the first molecular sieve tower and the second molecular sieve tower; the valve group comprises a main valve located at the air inlet end of the molecular sieve unit and a pressure equalizing valve located at the oxygen outlet end of the molecular sieve unit, and high-pressure hot air enters the main valve after being subjected to heat exchange through the heat exchange unit and enters the first molecular sieve tower or the second molecular sieve tower through the main valve; the heat dissipation module comprises a heat dissipation fan, and an air outlet of the heat dissipation fan corresponds to an air outlet of the compressor; and the control module is used for controlling the duty ratio of the cooling fan. The waste heat of the compressor is recycled and directly used for molecular sieve desorption, the low-temperature desorption efficiency is remarkably improved, and the service life of the molecular sieve is prolonged.

Provided is a household oxygen generator. The household oxygen generator includes a housing. A compression mechanism, a first air path module and an oxygen generation mechanism which are communicated in sequence are disposed in the housing. The first air path module includes a flow guide pipeline, a movable pipeline and a locking assembly. The movable pipeline is movably connected to the flow guide pipeline. The locking assembly is in transmission connection with the movable pipeline. The flow guide pipeline is connected to the oxygen generation mechanism. The locking assembly has a locking position and an unlocking position. When the locking assembly is in the locking position, the movable pipeline is clamped to or inserted into an air inlet of the oxygen generation mechanism. When the locking assembly is in the unlocking position, the movable pipeline is separated from the air inlet of the oxygen generation mechanism.

A low carbon-emission hydrogen production process may be achieved by first separating carbon dioxide from a reformer syngas stream, followed by separating the carbon dioxide-depleted syngas stream using a semi-permeable membrane to produce a hydrogen-enriched permeate and a hydrogen-depleted retentate. The hydrogen-enriched permeate is purified to produce a hydrogen product and a hydrogen-depleted tail gas stream. The hydrogen-depleted retentate stream may be recycled to the feed and the hydrogen-depleted tail gas stream may be used as fuel in the reformer burners.

The invention relates to an anti-fluctuation poly-generation ammonia production system driven by offshore wind power and a control method. The anti-fluctuation poly-generation ammonia production system comprises an energy supply unit, a feed gas production unit, an ammonia synthesis core unit and a byproduct utilization unit, the floating photovoltaic and the offshore wind turbine are connected to the wind-solar complementary controller, wind power and photovoltaic power cooperative allocation is achieved, the wind-solar complementary controller preferentially supplies wind power to the water electrolysis hydrogen production device, the response speed is high, photovoltaic power is supplied to the air separation device, the load is stabilized, and by flexibly adjusting the load of the water electrolysis hydrogen production device and the load of the air separation device, the wind power and the photovoltaic power are supplied to the wind-solar complementary controller. Wind and light fluctuation is stabilized, the running states of the water electrolysis hydrogen production device and the air separation device are adjusted, the problem of unstable supply of synthetic ammonia raw gas is avoided, the problem of sudden reduction of synthetic ammonia reaction efficiency is avoided, the fluctuation resistance of the system is remarkably improved, and the problem of unstable wind and light energy is solved; and the operation stability of the water electrolysis hydrogen production device and the air separation device is ensured.

A system and method of ultra-high purity (UHP) oxygen production from an argon and oxygen producing cryogenic air separation unit incorporating a dedicated methane rejection column or column section having a liquid to vapor (L / V) ratio lower than the L / V ratio in the associated argon rectifier is provided.

A portable oxygen generation system is provided that includes a reaction chamber, a supply system for supplying and controlling a hydrogen peroxide solution to the reaction chamber, and a cooling / condensing system for cooling the hot oxygen and water vapor leaving the reactor and condensing away the water. The portable chemical oxygen generation system produces breathable, humidified oxygen that is substantially free of hydrogen peroxide and other contaminants at a controlled flow rate and temperature for extended periods of time.

A method for purifying a crude hydrogen feed stream utlizes 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 discloses a crude argon hydrodeoxygenation system and a purification and liquefaction system and method, and belongs to the technical field of argon purification. According to the crude argon hydrodeoxygenation system, the first circulating compressor is arranged, and deoxidized gas is partially returned to the mixer to be mixed with oxygen-containing crude argon and hydrogen. As a diluent, the recycle gas can reduce the concentration of reactants entering the catalytic furnace. The control unit dynamically adjusts the hydrogen adding amount and the circulating gas flow according to the oxygen and hydrogen concentration and temperature signals, so that accurate and effective control over the temperature rise of the hydrodeoxygenation reaction is achieved, and the problem that the temperature rise of a catalyst bed is too high when crude argon with the high oxygen content is deoxidized is fundamentally solved. According to the purification and liquefaction system, the deoxidation system is integrated with deep purification, denitrification and liquefaction units, so that safe, efficient and energy-saving production from crude argon waste gas to high-purity liquid argon is realized, and the recovery rate and the product value of argon resources are remarkably improved.

The present application relates to rare gas separation and purification equipment technical field, and relates to a kind of krypton-xenon fine extraction device, including mounting plate, including raw material gas pretreatment unit, adaptive concentration system, rectification purification unit, product gas collection unit, the adaptive concentration system includes concentration tower and variable-angle elastic gas-liquid distributor, the concentration tower adopts variable-diameter tower body structure, including integrally arranged tower body upper section and tower body lower section, several layers of tray are arranged in the tower body of the concentration tower along the axial direction interval, the tray adopts sieve hole structure, a set of variable-angle elastic gas-liquid distributor is correspondingly provided above each layer of tray, the variable-angle elastic gas-liquid distributor includes stepper motor, rotatable flow guide pipe, titanium alloy elastic sieve plate and spring support assembly, effectively solve the distribution uniformity of gas-liquid two-phase in concentration tower in prior art, prone to channeling, deflection phenomenon, lead to mass transfer efficiency is low, influence krypton-xenon concentration effect problem.

This invention discloses a composite molecular sieve for nitrogen generators and its application. It is composed of a large-pore molecular sieve and a small-pore molecular sieve. The average micropore particle size of the large-pore molecular sieve is 0.36-0.45 nm, and the average micropore particle size of the small-pore molecular sieve is 0.28-0.36 nm. It can be used to prepare nitrogen with a purity of 99.999%, which is convenient and safe.