459 results about "Product gas" patented technology

The invention provides a pressure swing adsorption control method, a pressure swing adsorption control device and a pressure swing adsorption control system. The method comprises the steps that a hydrogen purity difference value is obtained, and the hydrogen purity difference value is the difference value between actual hydrogen purity and target hydrogen purity; determining target pressure swing adsorption time by adopting an APC algorithm and an RTO algorithm at least according to the hydrogen purity difference value; and controlling the pressure swing adsorption device to operate according to the target pressure swing adsorption time. According to the scheme, the problems of low product gas purity and unstable yield caused by low accuracy rate of pressure swing adsorption time in the prior art are solved.

The invention relates to a method and a system for synthesizing N-methylaniline and co-producing N, N-dimethylaniline by a gas phase method, and belongs to the technical field of chemical engineering. The system comprises a raw material gasification unit, a reaction unit, a separation and rectification unit and a hydrogen recovery unit which are connected through pipelines. The method comprises the following steps of: firstly, mainly synthesizing N-methylaniline from raw materials aniline and part of methanol in a first-methylaniline reactor, then partially or completely feeding first-methylaniline reaction gas into a second-methylaniline reactor, adding methanol steam, and further reacting to generate N, N-dimethylaniline. And after the product gas is subjected to heat exchange energy recovery, a liquid phase and a gas phase respectively enter the separation and rectification unit and the hydrogen recovery unit. The purification of N-methylaniline and N, N-dimethylaniline and the recovery of byproduct hydrogen are realized. The yield of N, N-dimethylaniline (in terms of aniline) can be adjusted in a range of 5-30% by adjusting reaction conditions and a feeding ratio.

The invention relates to a device and a process for purifying impurity gas in a disilane product synthesized from silane. The device comprises a gas inlet system, an adsorption system and a rectification system, the adsorption system comprises a first adsorption tower and a first vacuum pump for desorbing the first adsorption tower, and the first adsorption tower is communicated with the gas inlet system; the rectification system comprises a first rectification tower and a second rectification tower; the first rectification tower is communicated with the first adsorption tower through a first vacuum pump; the second rectifying tower is communicated with the first rectifying tower; the process comprises the following steps: adsorbing sample gas by a first adsorption tower; feeding gas into a first rectifying tower through a first vacuum pump; the first rectifying tower bottom material enters a second rectifying tower; a product disilane gas is obtained from the top of the second rectifying tower. According to the invention, high-content hydrogen, argon, helium and other light components in the product gas are adsorbed, and are primarily separated from silane, disilane, trisilane and the like. And compared with a gas-liquid separation mode only adopting condensation, the energy consumption and the disilane product loss in the purification process can be obviously reduced.

The present disclosure relates to a device for gas conversion comprising a plasma reactor and a chamber configured for receiving a gas flow of converted and unconverted feed gas evacuated from the plasma reactor. The chamber comprises a supply throughput for filling the chamber with solid reactant material so as to form the fixed bed of solid reactant material, and at least one gas exhaust window for extracting a product gas. The device for gas conversion further comprises a silo for storing a stock of the solid reactant material and a connecting tube connecting a bottom opening of the silo with the supply throughput of the chamber. The silo and the connecting tube are configured such that, when the device is in operation and solid reactant material is being depleted in the chamber, a flow of solid reactant material from the silo to the chamber is induced so as to maintain the chamber filled with solid reactant material, and wherein the flow of solid reactant material from the silo to the chamber is induced by a gravitational force or at least partly by a gravitational force. The present disclosure also relates to a method for gas-conversion.

The utility model discloses a hydrogen purifying and drying system and a hydrogen production system. The hydrogen purifying and drying system comprises at least two drying towers, the two drying towers are the first drying tower and the second drying tower, and the first drying tower and the second drying tower sequentially serve as a main working drying tower and a regeneration drying tower in turn in each operation stage of periodic operation; the main working drying tower is used for leading out a first part of hydrogen in purified hydrogen obtained by the main working drying tower through a product gas leading-out pipeline, leading a second part of hydrogen in the purified hydrogen into the regeneration drying tower through a regeneration gas leading-in pipeline, and leading out regenerated hydrogen obtained by the regeneration drying tower through the regeneration gas leading-out pipeline; a regeneration regulating valve, a flow detector and at least one pressure detector are arranged on one of the regeneration gas leading-in pipeline, the regeneration gas leading-out pipeline and the product gas leading-out pipeline, and the regeneration regulating valve is electrically connected with the flow detector and the at least one pressure detector respectively. The hydrogen purifying and drying system can realize low-load stable operation.

The invention relates to the technical field of filtering devices, and discloses compressed air self-cleaning type filtering equipment and a back flushing method, the compressed air self-cleaning type filtering equipment comprises a filtering unit, and the filtering unit comprises a filtering net; the back flushing unit comprises a main back flushing mechanism and an auxiliary back flushing mechanism, the main back flushing mechanism conducts back flushing on the filter screen through compressor finished product gas, and the auxiliary back flushing mechanism comprises a gas storage tank and an inflation pump and conducts back flushing on the filter screen through gas stored in the gas storage tank; the adjusting unit comprises a control valve and a sealing plate, the adjusting unit further comprises a transmission mechanism, and when the sealing plate rotates, the working state of the control valve is changed through the transmission mechanism. According to the back flushing device, the auxiliary back flushing mechanism is arranged to perform back flushing on the filter screen, when compressed air introduced by the main back flushing mechanism is insufficient, the auxiliary back flushing mechanism is switched, high-pressure air in the air storage tank is utilized to perform back flushing on the filter screen, and the situation that the cleaning effect is poor due to insufficient air pressure is avoided.

The invention discloses a real-time monitoring data control method for adsorption separation and an adsorption separation device, and relates to the technical field of adsorption and analysis regulation and control. The method comprises the following steps: setting a first cleanliness threshold value of finished gas and a second cleanliness threshold value of desorption gas; according to the current state of the first cleanliness and the current state of the second cleanliness, the regeneration medium flow of the analysis process is dynamically adjusted; or when the first cleanliness reaches the first cleanliness threshold value and the second cleanliness reaches the second cleanliness threshold value, the current adsorption process is ended, and the working mode is switched; if the second cleanliness does not reach the threshold value, the regeneration medium flow is increased until the switching condition is met. Saturation regulation is carried out by monitoring the dual states of the finished gas and the desorption gas in real time, actual working condition fluctuation can be responded in a self-adaptive mode, the quality stability of the finished gas is guaranteed, meanwhile, the problem that regeneration is insufficient or regeneration media are excessively consumed is solved, and operation energy consumption is remarkably reduced.

The invention relates to the technical field of hydrogen purification, in particular to an online diagnosis control system and method for a pressure swing adsorption tower. The control system comprises a product gas buffer tank used for storing the product gas of the pressure swing adsorption device; the main passage is connected with the product gas buffer tank and the analyzer and is used for conveying the product gas during normal detection; the multi-channel pipeline comprises a plurality of branch channels, and each branch channel is connected with one adsorption tower and is used for independently detecting the product gas of each adsorption tower; the automatic control unit is used for controlling opening and closing of valves of the main channel and the multi-channel pipeline to realize automatic switching of detection modes; and the analyzer is used for performing component analysis on the product gas. According to the invention, a multi-channel adsorption tower online diagnosis system is independently and additionally arranged on an original hydrogen detection pipeline. When a product quality problem occurs, the adsorption tower with the problem can be accurately positioned by virtue of the online diagnosis control system for the adsorption tower, so that the disposal cost is greatly reduced, and the problem solving efficiency is improved.

The invention discloses a pressure buildup device and a pressure buildup method for low-temperature purification of helium. The pressure buildup device comprises a flash evaporation unit, a purification unit and a heat regeneration unit which are connected in sequence. According to the invention, through the arrangement of the pressure buildup device, the product gas of the liquid-air separator can be used for carrying out pressure buildup on the adsorber under regeneration pressure buildup in a medium-high pressure working state, so that the adsorber under the regeneration pressure buildup in the working state is prevented from pressurizing the adsorber under the regeneration pressure buildup, and the pressure of the adsorber under the working state is prevented from being lost; due to the fact that the pressure difference between a liquid-air separator and an adsorber under regeneration pressure buildup is large, middle-high pressure impact is prone to causing equipment damage, meanwhile, the pressure buildup process is conducted in the purification process, the time needed by pressure buildup is shortened, after the adsorber in the working state is saturated, pressure buildup of the adsorber in the regeneration state is completed, automatic switching can be achieved, and the efficiency is improved. And the high-purity helium is continuously produced, so that the use requirement of the high-purity helium is met.

The embodiment of the invention discloses system control equipment for a methanation reaction system. The equipment comprises a methanation reaction system, a distributed control system and an advanced control system, the distributed control system is used for collecting the real-time flow value of the raw material gas passing through the flow control main valve and the flow control slave valve, the temperature value of the first gas passing through the first reactor and the temperature value of the second gas passing through the second reactor; sending the feed gas real-time flow value, the first gas temperature value and the second gas temperature value to an advanced control system; and the advanced control system is used for determining the valve opening degrees of the flow control main valve and the flow control slave valve according to the real-time flow value of the raw material gas, determining the valve opening degree of the distribution valve according to the second gas temperature value, and determining the valve opening degrees of the anti-surge valve and the guide vane valve according to the first gas temperature value. By applying the scheme provided by the embodiment of the invention, the methanation reaction system can be accurately controlled, so that the quality of finished gas is ensured to meet the process requirements.

The utility model discloses an integrated valve block for a pressure swing adsorption air separation device, which comprises a valve group a and a valve group b, an air inlet pipe is arranged at one end of the valve group a, a connecting pipe group a is arranged at the other end of the valve group a, a flowing pipe group a is arranged in the valve group a, and the air inlet pipe and the connecting pipe group a are both communicated with the flowing pipe group a; an air guide pipe is arranged at one end of the valve group b, a connecting pipe group b is arranged at the other end of the valve group b, a flowing pipe group b is arranged in the valve group b, and the air guide pipe and the connecting pipe group b are both communicated with the flowing pipe group b. A connecting pipe set a and a connecting pipe set b are connected with an adsorber set, meanwhile, an air inlet pipe is communicated with the connecting pipe set a and a flowing pipe set a, an air guide pipe is communicated with the connecting pipe set b and a flowing pipe set b, raw material air is guided in through the air inlet pipe, and then product air is output through the adsorption effect of filler in the adsorber set by controlling opening and closing of a corresponding pneumatic valve. Therefore, the number of threaded connectors is reduced, the welding workload is reduced, the assembly process is simplified, and the efficiency is improved.

The utility model relates to the technical field of preparation of electronic mixed gas, in particular to a preparation system of silane electronic mixed gas. The system comprises a bottom gas source, a raw material gas cylinder, a finished product gas cylinder, a collection gas cylinder and an absorption cell which are arranged on a gas distribution pipeline, the bottom gas source comprises a nitrogen gas source, the raw material gas cylinder is used for containing silane, and the absorption cell is used for containing alkali liquor; during gas distribution, the bottom gas source and the raw material gas cylinder are communicated with the finished product gas cylinder through a gas distribution pipeline, so that silane electronic mixed gas is prepared in the finished product gas cylinder; when silane in the raw material gas cylinder is filled into the finished product gas cylinder by a first mass through the gas distribution pipeline, the collection gas cylinder is communicated with the gas distribution pipeline, so that at least part of silane in the gas distribution pipeline is filled into the collection gas cylinder; when the residual silane is emptied, the absorption tank is communicated with the gas distribution pipeline, so that the residual silane in the gas distribution pipeline is absorbed into the alkali liquor and then is emptied. According to the technical scheme, the problems of burning explosion and raw material loss when silane in the pipeline is emptied can be effectively solved.

The present invention relates to a control method for energy-saving pressure swing adsorption gas production equipment. Based on a control system, a first valve group of an adsorption unit, and a regulating valve, a first flowmeter, a second flowmeter, a gas purity analyzer, and a pressure gauge of a gas storage unit, the control method includes the following steps: the control system calculates the total flow Q passing through the second flowmeter in a set time period, and compares it with the total flow Q' passing through the second flowmeter in the previous set time period. When Q>Q', the control system controls the opening of the regulating valve according to the detection value of the first flowmeter, shortening the adsorption cycle of the adsorption unit until Q and Q' are equal; when Q=Q', the control system controls the opening of the regulating valve to remain unchanged; when Q<Q', the control system controls the opening of the regulating valve according to the detection value of the pressure gauge, extending the adsorption cycle of the adsorption unit until Q and Q' are equal. The control method can automatically adjust the operating parameters to the most energy-saving state according to the real-time gas consumption and ensure that the product gas meets the usage demand.

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.

The embodiment of the invention discloses product quality control equipment for a methanation device. The equipment comprises a production system, a distributed control system and an advanced control system, a gasification device of the production system is used for conveying raw gas to a conversion furnace, the conversion furnace is used for converting the raw gas, obtained converted gas is conveyed to a purification device, the purification device is used for purifying the converted gas, obtained raw material gas is conveyed to a methanation device, and the methanation device is used for carrying out methanation reaction on the raw material gas to obtain finished product gas; the distributed control system is used for collecting the hydrogen-carbon ratio of the conversion gas output by the conversion furnace, the raw material gas specific gravity of the raw material gas output by the purification device and the hydrogen content of the finished product gas; and the advanced control system is used for determining the threshold value increment of the control valve according to the hydrogen-carbon ratio, the raw material gas specific gravity and the hydrogen content. By applying the scheme provided by the embodiment of the invention, the methanation production process can be accurately controlled, and the quality of the finished gas is ensured to meet the process requirements.

The invention relates to the technical field of renewable energy source hydrogen production, and discloses an off-grid alkaline electrolysis total hot standby method based on multi-source waste heat deep integrated recovery, which comprises the following steps: S1, constructing a frame which comprises an electrolytic cell array, a graded waste heat recovery loop, a phase change heat storage tank and an auxiliary and emergency assembly; s2, synchronously capturing multi-source waste heat of the system: starting a circulating power assembly of a graded waste heat recovery loop, and synchronously collecting process cooling waste heat and product gas waste heat generated in the operation process of the electrolytic cell array through the graded waste heat recovery loop; and S3, heat storage and cascade distribution. By constructing an independent closed type grading waste heat recovery loop, alkali liquor cooling waste heat in the process of operating an electrolytic cell captures sensible heat of high-temperature wet oxygen at an outlet of an oxygen separator through the waste heat recovery heat exchangers connected in parallel, direct loss of the two kinds of waste heat is avoided, external power or fuel does not need to be relied on for supplying energy to hot standby, and energy consumption in the hot standby stage is greatly reduced.

The utility model discloses a helium dehydrogenation and purification device taking air as regenerated gas. The helium dehydrogenation and purification device comprises a catalytic dehydrogenation reactor, a first adsorption reactor and a second adsorption reactor, a refrigerant of the heat exchanger is connected with a feed gas source and a compressed air source, a refrigerant outlet of the heat exchanger is connected with an inlet of the catalytic dehydrogenation reactor, an outlet of the catalytic dehydrogenation reactor is connected with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is connected with an inlet of the steam-water separator; inlets of the first adsorption reactor and the second adsorption reactor are connected with an outlet of the steam-water separator and a regenerated waste gas outlet; outlets of the first adsorption reactor and the second adsorption reactor are connected with a product gas outlet and a compressed air source; a hydrogen analyzer and a flow meter are arranged on a pipeline for connecting a refrigerant inlet of the heat exchanger with the feed gas source, and a flow controller and a flow control valve are arranged on a pipeline for connecting the refrigerant inlet of the heat exchanger with the compressed air source; the flow controller is electrically connected with the hydrogen analyzer and the flow meter and can control the opening degree of the flow control valve. The problem that hydrogen-containing gas cannot be provided as regeneration gas in most helium catalytic dehydrogenation purification scenes is solved.

The invention belongs to the field of hydrogen energy, and discloses a hydrogen recovery system and method for a hydrogenation mother station. The system comprises a hydrogen purification device, a product gas and recovery gas compressor, and an integrated pipeline network connecting feed gas, product gas, desorbed gas and a long pipe vehicle. According to the system, through a plurality of recovery paths, hydrogen which is not qualified in purification, desorbed gas and hydrogen replaced in the long pipe vehicle can be recovered to a fuel gas pipe network, a raw material gas inlet or a desorbed gas system respectively, and high-purity hydrogen can be used for carrying out online regeneration on a penetrating adsorbent. According to the invention, comprehensive recovery of the vented combustible gas in the hydrogenation mother station is realized, the hydrogen recovery rate is obviously improved, and the product gas quality and supply stability are ensured.

A reactor system and a process for carrying out reverse water gas shift reaction of a feedstock comprising CO2 and H2 to a first product gas comprising CO are provided, where a methanation reaction take place in parallel to the reverse water gas shift reaction, and where the heat for the endothermic reverse water gas shift reaction is provided by resistance heating.

The invention discloses a regeneration method for stable temperature rise of a pressure swing adsorption device, which comprises the following steps: closing an adsorbent regeneration system, and purifying raw material gas to be purified by using a purification system to obtain product gas; when the purity of the product gas cannot meet the requirement, the purification system is closed, and the adsorbent regeneration system is started; nitrogen is uniformly distributed into each pressure swing adsorption tower by adjusting each regeneration inlet valve, and the internal flow and the inlet and outlet pressure difference of each pressure swing adsorption tower are kept consistent by adjusting each regeneration outlet valve; and by adjusting all regeneration inlet valves and regeneration outlet valves, it is ensured that the temperature rise conditions in all the pressure swing adsorption towers are consistent, and the gas is finally discharged into an analysis gas tank. According to the invention, temperature rise and temperature drop are synchronously completed in the regeneration process of the pressure swing adsorption tower, and the regeneration effect is consistent.

The invention discloses a flue gas treatment control method for an intelligent commercial UV smoke hood, and relates to the field of flue gas treatment control of UV smoke hoods, and the flue gas treatment control method comprises the following steps: emitting interference sound waves on the upper layer of a smoke hood filter screen to generate a standing wave field, and carrying out secondary filtration on grease particles in flue gas based on a standing wave effect; analyzing the physical characteristics and mechanical characteristics of the grease particles in the standing wave field, and calculating the expected penetration rate of the grease particles in the flue gas in the secondary filtering process; based on the expected penetration rate of grease particles in the secondary filtering process, the UV illumination intensity is dynamically adjusted in combination with the flue gas flow rate; the variety and content of by-product gas in the flue gas after UV illumination treatment are analyzed, and the adaptability of the UV illumination intensity after adjustment is evaluated; and setting a UV illumination intensity secondary adjustment scale based on the UV illumination intensity suitability, and circularly adjusting the UV illumination intensity until the UV illumination intensity suitability reaches a set standard.

A carbon capture system may include a pressure swing adsorption unit for producing a product gas and a tail gas comprising at least one carbonaceous gas. The carbon capture system may include a molten carbonate fuel cell having a cathode and an anode for transferring CO2 from the cathode to the anode. The molten carbonate fuel cell may be a multi-stage fuel cell where the anode is in fluid communication with the pressure swing adsorption unit for receiving at least a portion of the tail gas as an inlet stream.

The invention discloses a system for producing hydrogen by electrolyzing seawater under a variable load working condition and a control method thereof. The system mainly comprises an electrolytic bath, a separator, a waste heat recovery device, an alkali liquor heat exchanger, a differential pressure transmitter, an alkali liquor circulating pump, a pneumatic diaphragm regulating valve, a flow meter, a temperature transmitter and a manual ball valve. Under the condition that the power supply power from the front end to the electrolytic cell fluctuates, the working power of the electrolytic cell is changed by synchronously adjusting the electrode current density, and the waste heat recovery vacuum degree, the hydrogen-oxygen separator liquid level difference, the system working pressure, the cooling water flow, the electrolyte flow and the hydrogen-oxygen small chamber pressure drop difference are dynamically adjusted; and an operation function is added into the control logic, so that a theoretical value of a control parameter is accurately calculated, and the beneficial effects of stable operation of a hydrogen production system and product gas quality are achieved when the power of the electrolytic cell fluctuates.

The utility model discloses a three-stage gas-liquid separator for producing hydrogen by electrolyzing water. The three-stage gas-liquid separator comprises a gas-liquid fluid inlet U-shaped spray pipe (1), a gas-liquid separation tank body (4) and a gas cooler (23) from upstream to downstream, the gas-liquid fluid inlet U-shaped spray pipe (1) is connected into the gas-liquid separation tank body (4); a gas-liquid mixture enters through the U-shaped spray pipe inlet (24) and is subjected to three-stage separation through the gas-liquid fluid inlet U-shaped spray pipe (1), the gas-liquid separation tank body (4) and the gas cooler (23), and gas subjected to three-stage separation flows out through the gas outlet (15). According to the horizontal gas-liquid separator, two stages of separation devices are additionally arranged at the inlet and the outlet of the horizontal gas-liquid separator, so that three-stage separation of a gas-liquid mixture is realized, the gas-liquid separation efficiency is improved, the gas purity is improved, and the water content of product gas is reduced.

The invention discloses a multi-channel intelligent carbon dioxide trapping system and a trapping method. The trapping system comprises a main pipeline system, a high-pressure desorption system, a decarburized gas washing reflux pipeline system, an absorption liquid self-circulation pipeline system, a semi-barren liquid reflux pipeline system, an interstage cooling pipeline system and a product gas separation and purification system, the main pipeline system comprises a pretreatment tower, an absorption tower, a heat exchanger, a regeneration tower, a first-stage water washing tower and a second-stage water washing tower; and the high-pressure desorption system comprises a flash tank. According to the embodiment of the invention, on the basis of the main pipeline system, a sufficient bypass pipeline system is arranged and comprises a high-pressure desorption system, a decarburized gas washing reflux pipeline system, an absorption liquid self-circulation pipeline system, a semi-barren solution reflux pipeline system, an interstage cooling pipeline system and a product gas separation and purification system; due to the design of the bypass pipeline system, materials in the carbon dioxide capturing process can be remarkably saved, capturing energy consumption is reduced, and the application range of the device is widened.

The invention provides an energy-heat conversion device for recycling industrial hydrogen-containing byproduct gas, and belongs to the technical field of combustors. The device comprises a hydrogen supply branch, an air supply branch and an energy-heat conversion device, hydrogen of the hydrogen supply branch comes from industrial by-product gas containing high-proportion hydrogen, the industrial by-product gas rich in hydrogen and air are pressurized through a compressor and then enter the energy-heat conversion device, the energy-heat conversion device comprises an air inlet pipe, an air outlet pipe and an air outlet pipe, the front portion of the nozzle body is communicated with an air supply branch, the front portion of the hydrogen inlet pipe is communicated with a hydrogen supply branch, gas supplied by the two branches is directly jetted into the combustion chamber through the nozzle body to organize coaxial diffusion combustion, and generated heat can be used for supplying heat or driving a small turbine to do work and the like. The energy-heat conversion device designed by the invention can realize the energy reutilization of industrial hydrogen-containing byproduct gas, and avoids serious energy waste caused by direct discharge of industrial waste gas.

The invention relates to a method for purifying acrylic acid by means of a recycled gas recirculation process, having the steps a) to f). Initially, the acrylic acid is part of a product gas mixture (PGM) which additionally contains auxiliary components and optionally water. In step a), the product gas mixture (PGM) is separated into a raw acrylic acid stream (RAS) and an auxiliary component stream (NKS) in a separating column (T-Kol). Then, in step b), the raw acrylic acid stream (RAS) is removed from the separating column (T-Kol). In step c), at least one part of the auxiliary component stream (NKS) is supplied to a splitting column (S-Kol) from the bottom of the separating column (T-Kol). In step d), at least one part of the auxiliary component stream (NKS) is split in the splitting column (S-Kol), thereby producing monomeric acrylic acid. In step e), the monomeric acrylic acid is removed at the head of the splitting column (S-Kol) as part of a recycled gas stream (KGS). In step f), at least one part of the recycled gas stream (KGS) is supplied to the separating column (T-Kol), wherein at least one part of the recycled gas stream (KGS) is introduced into the separating column (T-Kol) above the point where the product gas mixture (PGM) is supplied to the separating column (T-Kol).

To stably supply a product gas at a user-designated concentration even when the specific gas concentration of a gas grid varies across the user-designated concentration.SOLUTION: In order to remix non-permeation gas and permeation gas discharged from a separation membrane module and control a specific gas concentration to be constant, the gap separation system according to the present invention comprises: a non-permeation gas pipe having a first adjustment valve for obtaining non-permeation gas from a non-permeation side of the separation membrane module; and a permeation gas pipe having a second adjustment valve for obtaining permeation gas from a permeation side of the separation membrane module. A plurality of control modes are set on the basis of a magnitude relationship between the concentration of the non-permeation gas supplied to the non-permeation side of the separation membrane module and the specific gas concentration of a target product gas, and valve opening degrees of the first adjustment valve and the second adjustment valve are adjusted for each control mode.SELECTED DRAWING: Figure 1

The application discloses a helium low-temperature purification pressure building device and a pressure building method, which comprise a flash evaporation unit, a purification unit and a heat recovery unit connected in sequence. In the application, the product gas of the liquid air separator is used to build pressure for the adsorber under the regeneration pressure building in the high-pressure working state, so that the adsorber under the working state is prevented from charging pressure for the adsorber under the regeneration pressure building and the pressure of the adsorber under the working state is prevented from being lost. Since the pressure difference between the liquid air separator and the adsorber under the regeneration pressure building is large, the high-pressure impact is easy to cause the damage of the equipment, the pressure building process is arranged in the purification process, the time required for the pressure building is reduced, the adsorber under the working state is saturated, the adsorber under the regeneration state is built in pressure, automatic switching can be realized, the continuous production of the product high-purity helium gas is realized, and the use demand of the high-purity gas is met.

The application provides a hydrogen deep removal and moisture removal method. High-concentration raw gas is dynamically mixed with dry low-concentration reflux gas in a mixer to form mixed gas, so as to reduce the hydrogen content and reduce the reaction risk. After pressurized heating, oxygen with a precisely matched hydrogen concentration is injected into a reactor for reaction. The reactor is provided with an alternating fixed and rotatable cylinder, and the inner wall of the flow channel is coated with a catalyst; the corresponding cylinder speed is automatically adjusted based on real-time hydrogen concentration detection downstream, and the speed is accelerated when the concentration exceeds the standard to strengthen turbulent contact and prolong the reaction time, combined with the concentration threshold setting decreasing along the flow direction, so that the hydrogen is deeply removed to an ultralow level. The reaction generates moisture, most of which is separated by two-stage water cooling, and then is deeply adsorbed and dried to be completely removed to an ultralow content. Finally, the gas is divided into two parts, one part is output as product gas, and the other part is completely dried reflux gas which is recycled to the initial mixing step to reduce the reaction risk of high hydrogen content.