330 results about "Product gas" patented technology

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 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 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 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.

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.

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 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.

The invention belongs to the technical field of biomass gasification, and particularly relates to a preparation method of high-calorific-value biomass gas. The preparation method comprises the following steps: (1) performing pyrolysis reaction on a modified biomass raw material in a pyrolysis reactor to obtain pyrolysis gas and solid biochar; (2) enabling the pyrolysis gas and water vapor to flow into a fixed bed reactor filled with a catalyst layer in parallel from bottom to top, carrying out methanation reaction to obtain product gas, enabling the product gas to flow out from the top of the fixed bed reactor, dividing the product gas into three streams, namely product gas A, product gas B and product gas C, cooling the product gas A to 40-50 DEG C, returning the product gas A to the fixed bed reactor, and enabling the product gas B to flow into the fixed bed reactor; the product gas B directly returns to the fixed bed reactor, and the reaction gas C is cooled and then is collected as biomass fuel gas. According to the preparation method, the content of methane in the fuel gas and the calorific value of the fuel gas can be remarkably increased.

The utility model relates to a gas storage device. An existing gas storage device needs to accumulate pressure for a long time to obtain finished gas meeting the gas pressure requirement. The device comprises a gas storage tank set, the gas storage tank set comprises a main tank, an auxiliary tank and a communicating pipe set, the communicating pipe set comprises a first pipeline with a first one-way valve and a second pipeline with a second one-way valve, the first pipeline and the second pipeline are connected between the main tank and the auxiliary tank in parallel in a bridging mode, and gas in the main tank is shunted to the auxiliary tank through the first pipeline. Gas in the auxiliary tank flows back to the main tank through the second pipeline, and the pressure difference value needed for opening the first one-way valve is larger than that needed for opening the second one-way valve. The first one-way valve and the second one-way valve with different opening pressure difference values are arranged, it is guaranteed that the air pressure in the main tank can be rapidly increased by independently conveying air to the main tank, the pressure accumulation duration is shortened, the auxiliary tank can be used for storing the air overflowing from the main tank, air is supplemented when the pressure of the main tank is reduced, and it is guaranteed that the finished product air amount meets the use requirement.

This invention provides an integrated device and method for gas ultrapurification, comprising: an integrated sealed cavity; an adsorption system disposed inside the integrated sealed cavity, the adsorption system being filled with at least one adsorbent; a temperature control system disposed inside the integrated sealed cavity, including independent refrigerant circulation loops and hot medium circulation loops, for temperature control of the adsorption system; and a gas pipeline system including a raw material inlet, a displacement gas inlet, a product gas outlet, and a desorption gas outlet, each interface being connected to the integrated sealed cavity; the temperature control system controls the temperature of the adsorption system, enabling the sequential execution of a series of processes within the integrated gas ultrapurification device under the condition of an inert gas flow: preheating and activation of the adsorbent, low-temperature adsorption purification of the gas, high-temperature desorption regeneration, and cooling of the adsorbent for later use. The method of this invention is simple, easy to operate, and has broad industrial application prospects.

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

The utility model discloses a hydrogen sulfide synthesis skid-mounted system which comprises a liquid sulfur transfer module, a hydrogen sulfide synthesis module, a product gas pretreatment module, a product gas purification module, a tail gas treatment module and a public engineering module, the liquid sulfur transfer module, the hydrogen sulfide synthesis module, the product gas pretreatment module, the product gas purification module and the tail gas treatment module are sequentially communicated, and the product gas pretreatment module and the product gas purification module are both communicated with the liquid sulfur transfer module. According to the hydrogen sulfide synthesis skid-mounted system disclosed by the utility model, each functional component is modularized, the size of each module is configured in a coordinated manner and meets the transportation condition, corresponding process pipelines, instrument components, cables and the like can be prefabricated and mounted when leaving a factory, and debugging work can be carried out only by simple assembly and construction on a construction site; the workload of a construction site is greatly reduced, waste of installation materials is effectively reduced, and the device has the advantages of being small in occupied area, low in construction cost and the like.

The utility model provides a kind of crude argon tower unit and including the argon production system of the crude argon tower unit, crude argon tower unit includes crude argon tower, and the crude argon mixed gas after separation is accommodated with tower top space, and is communicated with crude argon condenser, and crude argon tower is equipped with the gas extraction pipeline of the communication of tower top space with downstream equipment in tower top, and gas extraction pipeline extracts part crude argon mixed gas from tower top space, forms product gas.The crude argon tower and including the argon production system of the crude argon tower directly extract product gas from the tower top space of crude argon tower, ensure pure gas phase gas, to improve the accuracy of flow detection, make equipment operation safer and more reliable;And the way of directly extracting product gas from tower top space, simple structure, without additional separation equipment, saves the manufacturing cost of overall equipment.

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

An adsorptive separation method is disclosed. The adsorptive separation method of the present invention is a method for adsorptively separating a first gas from a mixed gas using a plurality of adsorption beds provided with an adsorbent selectively adsorbing the first gas, characterized by comprising an adsorption step, a depressurization step, a first rinse step, a second rinse step, a depressurization desorption step, a purge step, a pressurization step, a pressure increasing equalization and step, a repressurization step. According to the present invention, in the second rinse step, a high-purity first gas is introduced into the adsorption bed at a first pressure, and in the depressurization desorption step, the first gas is compressed to the first pressure by a compressor in a process of being transferred to a high-pressure product vessel, thereby making it possible to provide an adsorptive separation method configured to reduce power consumption by pressurizing a product gas of atmospheric pressure or higher discharged in a blowdown step to a pressure at which a rinse is performed, and to reduce power consumption used to create a recirculation stream used for the rinse.

The utility model provides a water electrolysis product gas cleaning device and a water electrolysis system, and relates to the field of hydrogen production through water electrolysis. The water electrolysis product gas cleaning device comprises a separation tank and a mixing assembly, the mixing assembly is used for receiving to-be-cleaned product gas and fresh make-up water, the mixing assembly is used for mixing the to-be-cleaned product gas and the fresh make-up water to form a mixture, the mixing assembly communicates with the separation tank through a first channel, and the first channel is used for guiding the mixture into the separation tank; and the separation tank is used for separating clean product gas from the mixture. The mixing assembly is used for replacing filler in a traditional separation tank, the requirement for the large operation range of coupling of an electrolytic bath and renewable energy sources can be met, meanwhile, the mixing assembly is arranged outside the separation tank, filler does not need to be arranged in the separation tank, and therefore the overall height of the cleaning device for the water electrolysis product gas is reduced, and the cleaning device adapts to the low height limit requirement; and the application range is wider.

The invention provides a gas purification method and a gas purification device, which can efficiently utilize regeneration gas without a compressor and the like, can reduce the discharge gas amount of the regeneration gas, and can improve the recovery rate of product gas. Provided is a gas purification method in which an adsorption process for adsorbing and removing impurities in a raw material gas (G1) and a regeneration process for separating the impurities from the adsorption towers (2A, 2B, 2C) by heating the adsorption towers (2A, 2B, 2C) are repeatedly performed using three adsorption towers (2A, 2B, 2C), and the adsorption process is performed by at least one of the adsorption towers (2A, 2B, 2C). And a part of a purified gas (G2) obtained by removing impurities from the raw material gas (G1), which is discharged from the adsorption towers in the adsorption process, is used as a regeneration gas (G3) for purging the adsorption towers (2A, 2B, 2C) in the regeneration process, in which when at least two of the three adsorption towers (2A, 2B, 2C) perform the regeneration process, a part of the purified gas (G2) is discharged from the adsorption towers (2A, 2B, 2C) is used as the regeneration gas (G3) for purging the adsorption towers (2A, 2B, 2C). A regeneration gas (G3) sequentially flows through each adsorption tower (2B, 2C) for performing a regeneration process.

The utility model relates to the field of gas separation, in particular to a pressure swing adsorption system which comprises a gas distribution unit, an adsorption tower, a light component reflux unit, a heavy component reflux unit and a gas analyzer. Light-component product gas and heavy-component product gas are respectively produced from gas raw materials of multiple components through the adsorption tower, the product gas can flow back to the adsorption tower through the corresponding product gas buffer tank, the piston pump, the backflow buffer tank and the mass flow meter, and the pressure of the gas pumped into the backflow buffer tank can be accurately regulated and controlled by regulating and controlling the corresponding piston pump. The reflux ratio of the product gas is accurately controlled; meanwhile, a plurality of mass flow controllers are connected to the feeding end of the adsorption tower, so that the flow of the adsorption tower can be conveniently calculated and compared with the flow of the discharging end of the adsorption tower to judge whether the materials of the system are conserved or not, and gas raw materials with different contents can be conveniently adjusted to explore the separation effect of the pressure swing adsorption experiment.

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