1063 results about "Pressure swing adsorption" patented technology

The invention discloses a low-energy-consumption nitrogen-charging grain storage system and method, and relates to the field of nitrogen-charging grain storage. The method comprises the steps that compressed air is sequentially introduced into a filter set, a drying machine and a micro-oil adsorber to be purified and dried; stripping oxygen O2 molecules and water H2O molecules in the air by using a carbon molecular sieve pressure swing adsorption tower to obtain nitrogen N2 molecular gas; inputting nitrogen N2 molecular gas into a cold drying system, and cooling to a preset temperature range; detecting whether the concentration of the output nitrogen N2 molecular gas meets a preset concentration range or not by using an oxygen analyzer; and when the detected N2 molecular gas concentration of the nitrogen is lower than the lower limit of the preset concentration range, starting a circulating pump to suck the mixed gas in the closed warehouse to the carbon molecular sieve pressure swing adsorption tower for adsorption and nitrogen production again until the N2 molecular gas concentration of the output nitrogen meets the preset concentration range. Aiming at the problem that the nitrogen concentration in nitrogen-filled grain storage is difficult to accurately control in the prior art, accurate control of the nitrogen concentration and yield is realized.

The invention belongs to the field of pressure swing adsorption oxygen production equipment, and particularly relates to a radial flow adsorption tower for optimizing variable mass flow distribution. The adsorption tower comprises a tower body (1) composed of an upper seal head (11), a cylinder (12) and a lower seal head (13), and an outer gas channel pipe (2-2) and an inner gas channel pipe (2-1) are arranged at the bottom of the tower body (1) and serve as channels for gas to enter and exit from the tower body; a supporting flat plate (3) is arranged at the bottom of the cylinder body (12), a flow guide sealing head (4) is welded below the supporting flat plate (3), the gap space is occupied, and the airflow direction in a lower sealing head (13) is changed; an outer-layer porous barrel (5) and an inner-layer porous barrel (6) are fixedly connected to the middle part of the inner cavity of the tower body (1), and the bottom of the outer-layer porous barrel (5) and the bottom of the inner-layer porous barrel (6) are welded with the upper part of the supporting flat plate (3). According to the invention, the radial pressure and flow velocity distribution of the adsorbent bed layer between the outer-layer porous cylinder and the inner-layer porous cylinder in the height direction is optimized, the internal gap space is reduced, and the adsorbent efficiency is improved.

The invention discloses a model predictive control-based vacuum pressure swing adsorption carbon capture system optimization control method, which comprises the following steps of: performing an open-loop step experiment on a vacuum pressure swing adsorption carbon capture system by taking a cycle period as a unit step length to obtain a dynamic characteristic experiment curve of the vacuum pressure swing adsorption carbon capture system; according to data corresponding to the dynamic characteristic experiment curve, a discrete state space model representing the dynamic characteristics of the vacuum pressure swing adsorption carbon capture system is obtained through identification through a subspace identification method, the discrete state space model is amplified into an incremental state space model, and the incremental state space model is used for representing the dynamic characteristics of the vacuum pressure swing adsorption carbon capture system. Deriving the incremental state space model to obtain a prediction model; constructing a rolling optimization objective function of the prediction model, inputting the scheduling instruction into the prediction model, and designing a constrained MPC control algorithm based on the prediction model to obtain the MPC controller of the vacuum pressure swing adsorption carbon capture system; and the CO2 recovery rate and purity are precisely tracked and controlled through the MPC controller of the vacuum pressure swing adsorption carbon capture system. The technical problems that the CO2 recovery rate adjusting speed is low, the stability is poor and the CO2 purity deviates from the set value in a traditional control method can be solved, and meanwhile the anti-interference capacity and the multi-target optimization performance of the system are improved.

The invention relates to the technical field of PSA (Pressure Swing Adsorption) hydrogen extraction, in particular to a hydrogen purification process based on a PSA device, which comprises the following steps: raw material gas is firstly decompressed and enters the PSA device, a product hydrogen after impurity removal is sent to the outside, desorbed gas of the PSA device is pressurized by a desorbed gas compressor and is sent to a first-section shift converter, the raw material gas enters an adsorption tower in an adsorption state, and the desorbed gas enters a second-section shift converter; under the action of a special adsorbent, CO, N2, CH4O, CH4, AR and other components in the raw material gas are adsorbed, and high-purity H2 flows out of the tower top, is subjected to pressure stabilization metering through a regulating valve and then is sent out. According to the hydrogen purification process based on the PSA device, residual impurities can be deeply removed by using two-stage pressure swing adsorption, additionally arranging a two-stage adsorption tower and performing post-treatment detection on hydrogen, the impurity content required by high-purity hydrogen needs to be controlled at a ppm level, the purity of the hydrogen can stably rise to 99.99% or even higher through two-stage PSA, and the purity of the hydrogen is greatly improved. The use standard of ultra-high-purity hydrogen in the production of semiconductors and photovoltaic cells is met, and the process stability and the yield of products are guaranteed.

The invention discloses a biogas fermentation purification liquefaction and carbon capture process. The process comprises a biogas fermentation system for performing high-temperature fermentation on biomass; the biogas purification and liquefaction system, the CO2 purification and liquefaction system and the organic fertilizer production system are arranged at the biogas residue output end of the biogas fermentation system to produce organic fertilizer; a thermal energy recovery system; according to the invention, a high-temperature facultative anaerobic hydrolysis and high-temperature anaerobic fermentation process is provided, so that high-concentration biomass biogas is produced; cH4, H2S and CO2 in the biogas are separated and liquefied by adopting a process of'wet process and dry process serial desulfurization, PSA (Pressure Swing Adsorption) + MDEA (Methyl Methanol Ether Alcohol) decarburization, molecular sieve dehydration, single-order two-stage mixed refrigerant compression and propane refrigeration compression ', and produced liquid CH4 and CO2 are recycled; meanwhile, the biogas residues are subjected to a secondary fermentation technology under the action of microorganisms to obtain a solid organic fertilizer; in addition, the solar heat collection and heat pump technology is utilized, and the whole-field heat energy is recycled to supply heat to the biogas fermentation system.

The invention discloses a process for preparing ultra-pure hydrogen by recovering and purifying hydrogen. The process comprises the following steps: nitrogen replacement: carrying out three times of pressurization-decompression circulation on an adsorption tower and a pipeline; pretreatment of raw materials: hydrogen-containing tail gas is treated by a buffer tank, a compressor, a desulfurization tower and a horizontal adsorption tower and then enters a PSA (Pressure Swing Adsorption) system; pSA purification: a 6-2-3 / P process is adopted, two towers in six adsorption towers perform adsorption at the same time, and hydrogen larger than or equal to 99.99% is produced; regeneration of the adsorbent is completed through three-stage pressure equalizing and reducing, clockwise / anticlockwise pressure reducing, product hydrogen flushing and three-stage pressure equalizing and boosting; refining by a membrane separation unit: carrying out membrane separation on PSA hydrogen to produce ultrapure hydrogen of which the purity is greater than or equal to 99.999%, and returning trapped gas to a compressor; and condensate water recovery: carrying out steam stripping and deoxygenization on the process condensate liquid, and then taking the process condensate liquid as boiler feed water. The process integrates PSA and membrane separation technologies, realizes efficient and energy-saving ultrapure hydrogen preparation, and is suitable for the fields of green hydrogen energy storage, electronic industry, high-end chemical industry and the like.

The invention relates to the technical field of gas separation and purification, in particular to a method and system for recycling hydrogen in mixed gas through pressure swing adsorption. The method comprises the following steps: performing multi-layer adsorption impurity removal on mixed gas containing 20-25% of silane, 10-15% of disilane and 60-70% of hydrogen, and cooling to 22-28 DEG C; the mixed gas subjected to primary impurity removal enters a pressure swing adsorption device, and an adsorbent in the adsorption device is modified activated carbon. The system comprises a mixed gas cylinder, a pretreatment unit, a pressure swing adsorption unit and a hydrogen collection unit which are connected in sequence. By adopting the pressure swing adsorption method, the hydrogen recovery rate is remarkably increased and can reach 93%, the purity can reach 99.2% or above, and the strict requirement of high-end industrial production for high-purity hydrogen can be met.

The invention provides a system and a method for directly preparing olefin from synthesis gas. A reaction subsystem and a plurality of separation subsystems; according to the invention, synthesis gas is converted into product gas olefin by virtue of a reaction subsystem, and then mixed gas containing the product gas is cooled by virtue of a first separation subsystem, so that C5-C10 hydrocarbons, part of C3-C4 hydrocarbons and most of water vapor are liquefied and separated; after being dried by the second separation subsystem, the residual mixed gas enters a third separation subsystem to be subjected to pressure swing adsorption, so that an adsorbent adsorbs hydrocarbon with the diameter larger than 0.4 nm, and olefin in the product gas is completely separated; the residual mixed gas is continuously introduced into a fourth separation subsystem for pressure swing adsorption, so that the adsorbent adsorbs gas with the diameter smaller than 0.4 nm, and H2 is finally remained; further, the liquefied product collected in the first separation subsystem is shunted to a fifth separation subsystem and heated, so that the C3-C10 hydrocarbons are separated from H2O, and the collection of the C3-C10 hydrocarbons is completed; and the loss of olefin during olefin separation of the olefin product prepared from the synthesis gas is effectively reduced.

The invention relates to the technical field of molecular sieve and dust separation, in particular to a pressure swing adsorption molecular sieve screening device which is characterized in that the upper end of a screening pipe is connected with the upper end of a dust conveying pipe, and the lower end of the dust conveying pipe is connected with the lower end of a primary dust collecting pipe; a plurality of air supply branch pipes are arranged in the lower portion of the screening pipe, a feeding port is formed in one side of the upper portion of the screening pipe and connected with a feeding hopper, the feeding hopper is connected with a feeding pipe, and a transverse dispersing device and a longitudinal dispersing device are arranged on the inclined face in the feeding hopper. And a screen is arranged in the screening pipe, and the screen is arranged between the feeding port and the air supply branch pipe. The air supply branch pipe on the lower portion of the screening pipe provides airflow into the screening pipe and is used for separating dust and a molecular sieve; the device is used for regularly screening and removing pulverized molecular sieve particles, so that the requirement of frequent replacement caused by aging and crushing of the molecular sieve is reduced, the production cost is reduced, and the oxygen production efficiency and the product quality are improved.

The invention belongs to the technical field of hydrogen purification equipment, and discloses pressure swing adsorption hydrogen purification equipment which comprises an adsorption tower, a gas inlet pipe is fixedly connected to one end of the adsorption tower, a first cavity and a second cavity are formed in the adsorption tower, a partition plate is installed between the first cavity and the second cavity, and the partition plate is rotationally connected with the adsorption tower through a rotating assembly. Adsorbent layers are mounted at the top end and the bottom end of the partition plate, and the two adsorbent layers are arranged in the first cavity and the second cavity correspondingly; the rotating assembly comprises first rotating shafts fixedly mounted on the two sides of the partition plate, one end of one first rotating shaft is fixedly connected with a gear, a mounting plate is arranged on one side of the gear, and during work, the partition plate is driven by the driving assembly to turn over by 180 degrees, so that the positions of the two adsorbent layers in the first cavity and the second cavity are exchanged; and not only can the complexity of operation during replacement of the adsorbent layer be reduced, but also shutdown treatment is not needed, so that continuous and stable operation of the device is ensured.

The invention relates to a method for preparing carbon monoxide by reverse water gas shift, which comprises the following steps: under the catalytic action of a supported catalyst, carrying out reverse water gas shift reaction, carrying out pressure swing adsorption treatment on mixed gas generated in the reaction process, and desorbing to obtain carbon monoxide. By coupling the reverse water gas shift reaction and the pressure swing adsorption process and exerting the synergistic effect of the reverse water gas shift reaction and the pressure swing adsorption process, efficient and rapid separation of carbon monoxide is realized, the reverse water gas shift reaction is promoted to be carried out in the forward direction, the reaction requirement of reverse water gas shift is reduced, the reverse water gas shift reaction is carried out under relatively mild conditions, and the reaction efficiency is improved. The long-period efficient conversion of carbon dioxide is realized, and the conversion rate of carbon dioxide and the selectivity of carbon monoxide are further improved.

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.

The utility model discloses a modularized pressure swing adsorption oxygen generation device which comprises an oxygen generation tank, an air inlet mechanism arranged on one side of the oxygen generation tank, an auxiliary mechanism mounted on the surface of the oxygen generation tank, a collecting mechanism arranged on one side of the oxygen generation tank, and a detection mechanism mounted below the oxygen generation tank. According to the oxygen generation device, air entering the oxygen generation tank can be subjected to auxiliary filtering treatment, the cleanliness of the air is improved, a filtering part can be subjected to auxiliary cleaning, the situation that the filtering part is blocked or unsmooth in air inflow due to filtered impurities is reduced, meanwhile, the oxygen generation tank is provided with a detection mechanism, oxygen is conveniently detected, and the oxygen generation efficiency is improved. When the detected purity is not enough, auxiliary filtering and purifying treatment can be carried out, the oxygen production purity can be improved, an auxiliary mechanism is arranged on the oxygen production tank, auxiliary cooling and heat dissipation treatment can be conveniently carried out on conveyed oxygen production gas, oxygen production treatment can be better carried out, and meanwhile, a collecting mechanism is arranged on the oxygen production tank; other gases generated during oxygen production can be conveniently collected.

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

The invention discloses a normal-temperature natural gas helium extraction and purification system and purification method. The system comprises a first-stage membrane separator, a second-stage membrane separator, a third-stage membrane separator, a pressure swing adsorption unit and the like, helium in natural gas is primarily concentrated through the first-stage membrane separator, after impurities are removed, the natural gas enters the third-stage membrane separator to be further concentrated, and permeated gas enters the second-stage first-section membrane separator to be concentrated to be high in concentration; the helium content in the impermeable gas is extremely low, and the impermeable gas returns to a pipe network; the permeated gas of the second-stage first-section membrane separator enters a fine dehydrogenation unit and a pressure swing adsorption unit, and then high-purity helium is produced; the impermeable gas of the second-stage first-section membrane separator enters the second-stage second-section membrane separator and then returns to the system for circulation; the impermeable gas of the second-stage second-section membrane separator returns to the third-stage membrane separator for recycling; and desorbed gas of the pressure swing adsorption unit returns to an outlet of the first-stage membrane separator for circulation. According to the system, helium in natural gas is purified by adopting very low energy consumption, helium in boil off gas (BOG) in the natural gas liquefaction process can also be purified, and a very good application effect is achieved.

The present invention discloses a rotary valve, which includes: a valve body, which is a cylindrical structure, and is provided with three flow channel groups; and a valve sleeve, whose coaxial sealing sleeve is provided on the valve body, and the valve sleeve is evenly provided with multiple through holes, the inner end of each through hole extends to form a vertical groove, and the vertical groove is divided into three sections along the vertical direction, corresponding to the ports of different flow channel groups respectively. A switching valve is provided at the through hole, and the switching valve connects the through hole to the two sections of the vertical groove, thereby switching the corresponding two flow channel groups to a working state. The valve body rotates around the axis relative to the valve sleeve so that the multiple through holes are combined and connected with the ports of the two flow channel groups in the working state, thereby changing the process operation mode. Each through hole is connected to at most one port of the valve body. The present invention also discloses a pressure swing adsorption device. The rotary valve of the present invention can switch the working state of the flow channel group, realize online switching of the timing process, meet the demand for improvement of process conditions due to fluctuations in on-site raw materials, and enhance production flexibility.

Adsorbent material for use in pressure swing adsorption (PSA) related processing can provide improved purification processing with reduced temperature differentials between adsorption and desorption processing of the bed of adsorbent material. Embodiments can be configured so that adsorbent material has occluded micropores or macropores. The occlusion of the micropores or macropores can be up to 42% of the micropores the adsorbent material in some embodiments. At least one metal acetate can be utilized for the occlusion of the micropores or macropores. Utilization of the adsorbent material having occluded micropores or macropores was surprisingly found to increase the yield for purification of a product gas in spite of the occlusion of the micropores or macropores.

The invention provides a replacement vacuum pressure swing adsorption ethylene recovery system and method based on molecular sieves, the system comprises a plurality of adsorption towers which are connected, the adsorption towers are filled with molecular sieve adsorbents, the bottoms of the adsorption towers are connected with a feeding pipeline, an ethylene discharging pipeline and a replacement pipeline, the feeding pipeline is connected with feed gas, and the ethylene discharging pipeline is connected with the replacement pipeline. The ethylene discharge pipeline and the replacement pipeline are both connected with the ethylene product buffer tank, and the top of the adsorption tower is connected with a residual gas discharge pipeline; ethylene can be efficiently recovered by adopting the molecular sieve adsorbent, high-purity ethylene can be obtained by combining with reasonable step sequence setting, and a high ethylene recovery rate is kept; ethylene is recycled through replacement vacuum pressure swing adsorption, and the method is low in energy consumption, simple in technological process, convenient to operate and maintain and low in investment cost; the purity of ethylene is guaranteed through the replacement step, meanwhile, vacuum is added, ethylene can be recycled to a greater extent, it is guaranteed that precious resources are not wasted, meanwhile, the circular economy concept is met, and cyclic utilization of the resources is achieved.

The invention discloses an oxygen separation device for a pressure swing adsorption system, and relates to the technical field of oxygen separation. The oxygen separation device for the pressure swing adsorption system comprises an oxygen separation tank; the central shaft is arranged in the oxygen separation tank in the axial direction of the oxygen separation tank and can rotate around the axis of the central shaft; the zeolite molecular sieves sleeve the outer side of the central shaft and are uniformly distributed along the axial direction of the central shaft; and the up-down transposition mechanism is arranged on the zeolite molecular sieve, can synchronously act along with the rotation of the central shaft, and is used for driving the zeolite particles to generate position alternation in the axial direction. By arranging the up-down transposition mechanism synchronously acting with the rotary drum, the zeolite particles are driven to continuously perform ordered position alternation in the axial direction, so that dynamic cyclic replacement of adsorption areas is realized, the zeolite particles at different positions alternately participate in the adsorption process, the load of each area is effectively balanced, and local premature failure is prevented.

The invention belongs to the technical field of petroleum refining, and relates to a high-purity hydrogen recovery process for improving denitrification efficiency based on a PSA (Pressure Swing Adsorption) device, which comprises the following steps: carrying out primary adsorption impurity removal after pretreatment and pressure regulation on raw material gas, carrying out gas-liquid separation, pretreatment and pressure regulation on the obtained hydrogen-rich gas, and then carrying out membrane separation; the generated hydrogen-rich permeated gas is subjected to pressure regulation and then is sequentially input into a second-stage PSA device and a third-stage PSA device for further adsorption and purification, and finally finished hydrogen with the purity not lower than 99.9% is obtained. The membrane separation technology is adopted for selective separation of hydrogen and nitrogen, the membrane separation unit is arranged at the outlet of the first-stage PSA device, nitrogen is removed from the source, meanwhile, desorbed gas of the third-stage PSA device and retention gas of the membrane separation unit are combined for combustion, nitrogen accumulation in the system is avoided, the nitrogen circulation amount in the system is reduced, and the energy consumption of the system is reduced. The hydrogen recovery rate can be effectively improved while the adsorption efficiency is improved, the process is simple, the investment cost is low, the implementation period is short, and remarkable economic benefits and process advantages are achieved.

The invention belongs to the technical field of gas separation, and particularly relates to a zero-gas-consumption PSA (Pressure Swing Adsorption) air separation nitrogen-making device which comprises an adsorption tower, a top cover, a gas outlet pipe, a gas inlet pipe and an electromagnetic valve, the protection mechanism is arranged at the joint of the adsorption tower and the top cover; the back flushing mechanism is arranged at the upper end of the adsorption tower; the blocking mechanism comprises a blocking part arranged in the air outlet pipe, an abutting part is arranged on the blocking part, an adjusting part is arranged on the abutting part, and the pressure generated by the abutting part on the blocking part is adjusted by twisting the adjusting part; wherein the protection mechanism comprises an outer shell, the outer shell is composed of two shell bodies, reinforcing parts are annularly distributed in the outer shell, and warning parts and linkage parts are arranged on the reinforcing parts. According to the invention, a high-efficiency zero-gas-consumption air separation nitrogen production process can be realized; and meanwhile, good safety protection measures are taken, and the situation of gas leakage is reduced.

The invention discloses coke oven gas PSA hydrogen production purification equipment with a pressure protection function, and relates to the technical field of PSA hydrogen production purification equipment.The coke oven gas PSA hydrogen production purification equipment comprises a base, a mounting plate is arranged at the top of the base, a vibration compaction mechanism is arranged between the top end of the base and the bottom end of the mounting plate, and the top end of the mounting plate is fixedly connected with a first adsorption tank and a second adsorption tank; according to the present invention, by arranging the speed reduction hindering mechanism and the discharge conduction mechanism, when the pressure sensor detects that the internal pressure of the first adsorption tank is too high, the hydrogen feeding speed is hindered and reduced, and the gas flow of the inlet gas is adjusted; meanwhile, part of impurity gas adsorbed in the first adsorption tank is driven to be released outwards, so that the pressure is reduced, the pressure balance is maintained, the pressure protection effect is achieved, damage to equipment due to too high pressure is avoided, and the operation safety of the equipment is guaranteed.

The present invention relates to the technical field of adsorbents, and specifically discloses a pressure swing adsorption hydrogen purification adsorbent for synthesizing morpholine and a preparation method thereof. The specific preparation method comprises the following steps: Step a: grinding the binder into powder for standby; Step b: mixing 13X molecular sieve, binder, structure stabilizer and calcium compound in a certain proportion, and forming a spherical compound A after mixing; Step c: pre-drying the spherical compound A, followed by roasting, washing, drying and activation to obtain the adsorbent. The pressure swing adsorption hydrogen purification adsorbent for synthesizing morpholine provided by the present invention has good adsorption effect, can tolerate high concentration of CO2, and a structure stabilizer is added to the adsorbent, so that the prepared adsorbent has a stable structure and can tolerate the influence of gas flow scouring, particle and bed vibration on the adsorbent. Finally, the preparation method of the adsorbent of the present invention is simple and easy for industrial production.

The invention provides an adsorption process for recovering ethylene from refinery dry gas through combination of MOF and zeolite, raw material gas is refinery dry gas, a main body contains hydrogen, carbon dioxide, C1-C3 low-carbon hydrocarbon gas and the like, the content of C2H4 is about 10%, a pre-decarburization process and an associated bed process are introduced, the adsorption capacity of an adsorbent is protected, and the content of ethylene is reduced. The non-compliant purity ethylene gas in the pressure swing adsorption process is re-enriched and recovered through an associated bed; in the initial stage of adsorption separation, after CO2 is removed through a customized or commercialized adsorbent, C2H4 enrichment and purification are directly carried out, and by introducing an associated bed, ethylene in gas passing through the adsorption process and ethylene gas in the preliminary desorption process of the adsorption bed are captured again, so that the ethylene recovery rate in the process is improved.

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.

Disclosed in the present invention is an integrated reforming power generation test system having wide-range fuel adaptability, comprising a fuel supply subsystem, a catalytic reforming subsystem, a hydrogen purification subsystem, a power generation subsystem, and a test monitoring subsystem. A fuel pump and a fuel delivery pump are connected to a water-gas shift reactor by means of an evaporator and a reformer, the water-gas shift reactor is connected to a pressure swing adsorption device by means of a first gas-liquid separator, the pressure swing adsorption device is connected to a fuel cell stack by means of a hydrogen buffer tank, and a gas chromatograph is connected to the reformer by means of a third gas-liquid separator and to the water-gas shift reactor by means of a second gas-liquid separator. By using a variety of fuel resources to produce electricity, the present invention breaks through the limitation of the scope of traditional single-fuel reforming power generation systems, ensures the reliability of electricity supply, gets rid of the dependence on specific fuels, enhances regional energy safety, and improves the flexibility of energy supply.

The invention discloses a pressure swing adsorption device of a hydrogen production system. The pressure swing adsorption device comprises a first adsorption tower, a second adsorption tower, a waste gas emission unit, a hydrogen input pipe, a hydrogen output pipe, a program control valve group and a PLC (Programmable Logic Controller) control system, according to the device, a plurality of adsorption layers are respectively arranged in the first adsorption tower and the second adsorption tower, and the pressure change of each adsorption tower in different adsorption and regeneration stages is controlled, so that the intelligent control of the pressure swing adsorption hydrogen production process is realized, and the first adsorption tower and the second adsorption tower alternately perform adsorption and regeneration; compared with the traditional two independent steps of deoxidation and drying, the method has the advantages that the influence on the purification effect of hydrogen due to flow connection is avoided, the hydrogen purification flow is efficiently integrated, and the purification effect and efficiency of hydrogen are improved; by controlling the opening and closing time and sequence of the program control valve group, when one adsorption tower performs adsorption operation, the other adsorption tower performs regeneration operation, so that the overall efficiency and yield of the system are improved.

The invention discloses pressure swing adsorption type hydrogen purification equipment, and relates to the technical field of hydrogen purification, the pressure swing adsorption type hydrogen purification equipment comprises a first adsorption tower, a second adsorption tower and a treatment box, the first adsorption tower and the second adsorption tower are both communicated with a gas storage tank, a filter drum is rotatably arranged in an impurity removal chamber, a heating box is fixedly arranged in a heating chamber, and the filter drum is communicated with the gas storage tank. A cooling pipe is arranged in the cooling chamber, a dewatering pipe is arranged in the dewatering chamber, the output end of the dewatering pipe is communicated with the interior of the gas storage tank, a first dewatering mechanism is arranged in the cooling chamber, and a second dewatering mechanism is arranged in the second liquid discharging pipe. According to the invention, the filtering drum, the heating box, the cooling pipe and the second liquid discharge pipe are arranged in the treatment box, so that impurity removal, heating and two-time dehydration of gas are facilitated, gas treatment is set in a centralized manner, a plurality of parts do not need to be controlled to be linked during use, only a small number of devices need to be controlled to work, and the cost is reduced. And gas treatment can be completed.

A process and a plant for the production of hydrogen or for the synthesis of ammonia, said process comprising the following steps: (a) performing a reforming process (101) of a hydrocarbon feedstock (1) to generate a raw syngas (2), said reforming process comprising at least an autothermal reforming step (104) in presence of oxygen-enriched air or pure oxygen (3) produced by an air separation unit (ASU; 103); (b) subjecting said raw syngas (2) to a post-treatment (102) providing hydrogen (H2; 4), a CO2-enriched stream (5), and a residual gas (6); said post-treatment comprising at least a water gas shift conversion step (105) of said raw syngas into a shifted syngas (7), a pressure swing absorption step (106), and a cryogenic separation step (107); wherein said pressure swing absorption step produces said hydrogen and a first tail gas (8) comprising carbon monoxide (CO), carbon dioxide (CO2), residual hydrogen (H2) and unreacted hydrocarbon feedstock from the shifted syngas (7), and said cryogenic separation step separates the CO2-enriched stream and a second tail gas (9) from said first tail gas; said post-treatment (102) comprising a further separation step (120) of a CO2-containing stream (11) and of the residual gas (6) from said second tail gas; (c) recycling said residual gas (6) as feed to said reforming process and / or as fuel to one or more fired heater(s) (10) of said process; (d) optionally feeding a portion (4.8) of said hydrogen (4) obtained in step (b) as fuel to one or more fired heater(s) of said process; (e) optionally an ammonia synthesis step (110) wherein said hydrogen (4) and a nitrogen (N2)-containing stream (12) produced by said ASU (103) are reacted in a given stoichiometric ratio and in ammonia (NH3) synthesis conditions to obtain an ammonia-containing product (13).

The invention discloses a method and a device for controlling the flow rate of pressurized air flow of a bed layer of a pressure swing adsorption device, and relates to the technical field of adsorption control. The method and the device for controlling the flow rate of the pressurized air flow of the bed layer of the pressure swing adsorption device comprise the following steps: S1, acquiring pressure difference state data in real time, and preprocessing the pressure difference state data; s2, slip sheet displacement balance is carried out on the differential pressure state data; s3, throttling opening response is conducted on the pressure difference state data; s4, setting a movement boundary of the slip sheet; and S5, the pressure difference state data, the sliding vane displacement balance result and the throttling opening response result are synthesized to execute buffer energy consumption evaluation. The problems that the throttling opening is fixed, the gas flux cannot be dynamically adjusted according to the actual working condition and the adjusting rigidity and the energy efficiency are reduced due to the fact that the front and back pressure difference change of the adsorption tower cannot be sensed in real time in the throttling process and a pressure difference driven feedback adjusting mechanism is lacked are solved.