601 results about "Pressure swing adsorption" patented technology

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 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 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 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.

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.

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.

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.

Provided are a natural gas helium extraction device and a natural gas helium extraction method. The natural gas helium extraction device comprises a primary concentration part, a dehydrogenation and dehydration part, a secondary concentration part, and a final purification part. The primary concentration part comprises a first compressor, a first preheater, and a first membrane separator connected in sequence. The dehydrogenation and dehydration part comprises an oxygen delivery pipe, a mixer, a plurality of dehydrogenation towers connected in parallel, a low-temperature water separator, and a water remover. The secondary membrane separator of the secondary concentration part comprises a permeate gas outlet and a non-permeate gas outlet. The non-permeate gas outlet is connected to the primary concentration part. The final purification part comprises a nitrogen circulating cooling component and a pressure swing adsorption (PSA) device. The PSA device is connected to the permeate gas outlet of the secondary membrane separator and is used to output high-purity helium. The nitrogen circulating cooling component, the PSA device, and the low-temperature water separator form a cooling loop. The natural gas helium extraction device and the natural gas helium extraction method can significantly reduce safety risks and effectively reduce equipment costs.

The invention relates to the technical field of waste gas recycling, in particular to a refining agent regeneration method and system. The refining agent is used for removing impurities in polyolefin hydrocarbon raw materials, and the regeneration method comprises the following steps: sequentially and repeatedly purging and cooling the polyolefin refining agent by using nitrogen to respectively obtain first regeneration cooling exhaust gas and a purging refining agent; sequentially carrying out liquid separation and first pressure swing adsorption on the first regeneration exhaust gas to obtain a first hydrocarbon adsorption material; pressurizing and displacing the purging refining agent by using a polyolefin raw material to respectively obtain mixed exhaust gas and a regenerated refining agent; the mixed exhaust gas is subjected to liquid separation and second pressure swing adsorption in sequence, and a second hydrocarbon adsorption material is obtained; and desorbing the first hydrocarbon adsorption material and the second hydrocarbon adsorption material to obtain the polyolefin recycled material. According to the regeneration method, a three-stage coupling separation system of purging regeneration, liquid separation and pressure swing adsorption is constructed, and compared with a traditional thermal regeneration method, the recovery rate of hydrocarbon raw materials in regenerated exhaust gas of the refining agent can be increased only through pressure swing adsorption.

The invention discloses an air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with a pressure curve, and relates to the technical field of intelligent pollution discharge. The air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with the pressure curve comprises the following steps: S1, collecting running state data in real time, and preprocessing the running state data; s2, performing pressure disturbance intensity analysis on the operation state data; s3, performing real-time analysis and feature extraction on the pressure curve; s4, performing start-stop risk prediction on the operation state data; and S5, integrating the operation state data, the pressure disturbance intensity analysis result and the start-stop risk prediction result to execute a pollution discharge control instruction. The problems that an air compressor and a pressure swing adsorption system lack linkage control based on pressure change, pollution discharge easily causes pressure fluctuation and frequent starting and stopping, energy consumption is increased, equipment abrasion is caused, and an existing control mode lacks a feedforward adjusting mechanism are solved.

The invention provides a crude helium storage and recycling system for a cryogenic helium extraction process and a recycling control method, and relates to the technical field of helium production. The crude helium storage and recycling system for the cryogenic helium extraction process comprises a membrane separation device, a permeable gas supercharging device, a pressure swing adsorption device, a low-temperature adsorption device, a first storage tank group, an unloading device, a second storage tank group, a first detection unit, a second detection unit, a first recycling loop, a second recycling loop, a third recycling loop and a control device. According to the technical scheme, the first detection unit is arranged to monitor the concentration of methane and carbon dioxide in the crude helium at the outlet of the pressure swing adsorption device, high-concentration impurities can be effectively prevented from entering the low-temperature adsorption device, the problem of equipment freezing and blocking caused by condensation is avoided, the crude helium recycling path is dynamically adjusted, and the recycling efficiency of the crude helium is improved. And the gas meeting the standard is sent to the next stage for treatment, so that the helium quality and the production efficiency can be improved in the cryogenic helium extraction process.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention relates to the technical field of gas adsorption materials, in particular to special silica gel for pressure swing adsorption hydrogen extraction and a preparation method thereof. The special silica gel for pressure swing adsorption hydrogen extraction comprises pretreated adsorption silica gel and advanced treatment adsorption silica gel, wherein the pretreated silica gel is specially used for capturing polar molecules; and the silica gel is deeply treated to accurately adsorb small-molecule gas. During preparation, a graded functionalization strategy is adopted, the stability of a silica gel framework is enhanced through acid activation, a multi-stage adsorption interface is constructed through amino / fluorocarbon directional grafting, and active components are fixed through chemical bonding to avoid loss. During application, a double-tower pressure swing adsorption process is adopted, the pretreatment adsorption tower preferentially removes strong adsorbate, the deep treatment adsorption tower improves hydrogen purity through hydrophobic screening, and gradient pressure reduction and pulse nitrogen desorption technologies are matched, so that efficient regeneration of the adsorbent is realized. A single material system breaks through a mass transfer barrier of a traditional multi-adsorbent combination, has the characteristics of high-selectivity adsorption and low-energy-consumption desorption, and is suitable for efficient recovery of hydrogen resources in synthesis ammonia tail gas.

The invention provides a prebaked anode flue gas carbon capture integrated system which comprises an integrated purification unit, a pollutant removal unit and a pressure swing adsorption carbon capture unit which are sequentially connected through a pipeline, flue gas is subjected to dust pre-removal and organic pollutant adsorption of the integrated purification unit and deep treatment of nitrogen and sulfur oxides of the pollutant removal unit, and the flue gas is subjected to carbon capture and carbon capture. According to the invention, the flue gas enters the pressure swing adsorption unit and then is efficiently captured by the pressure swing adsorption unit, and a continuous and synergistic treatment chain is formed in the whole process, so that the heat loss of the flue gas transmitted among the units is obviously reduced, and the energy waste caused by equipment dispersion in the traditional system is avoided; meanwhile, in the aspect of equipment layout, the modular integrated design greatly compresses the occupied area, efficient utilization of an industrial site is achieved, the flue gas treatment cost is reduced, and the flue gas treatment reliability is improved.

The invention relates to the technical field of air conditioner environment control, in particular to an energy-saving pressure swing adsorption air conditioner type intelligent oxygen supply system based on a plateau area. The system comprises a data acquisition module for acquiring data: a suspected interference position analysis module for screening suspected interference positions according to synchronization abnormity of oxygen concentration between monitoring positions and analyzing the abnormity possibility of oxygen concentration deviation; the ventilation interference analysis module obtains the ventilation interference possibility through the continuous distribution of the suspected interference position and the abnormal possible descending trend, and measures the ventilation interference intensity in combination with the current ventilation interference position distribution and the air pressure difference fluctuation; and the oxygen regulation and control module is used for determining the weight of each position based on the ventilation interference possibility and the interference intensity and evaluating comprehensive oxygen concentration regulation and control. According to the method, the comprehensive monitoring result of the oxygen concentration is adjusted by analyzing the abnormal and ventilation interference influence conditions of multiple monitoring positions, the oxygen supply precision is improved, and the accuracy and reliability of indoor oxygen concentration control in the plateau area are guaranteed.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The application discloses a preparation method of a carbon molecular sieve adsorbent for methane-nitrogen separation. The method comprises the following steps: 1) grinding graphite powder and placing the same in a metal salt solution, drying after sufficient stirring to obtain modified graphite; 2) placing phenolic resin powder in a metal salt solution, drying after sufficient stirring to obtain modified resin; 3) mixing the modified graphite and the modified resin, adding tar into the mixture, kneading and then extruding into a strip shape; 4) sufficiently drying the formed material, then transferring the material into a gas atmosphere calcination furnace, and calcining the material under an inert gas atmosphere for a certain time; and 5) performing programmed temperature heating on the obtained material under an inert gas atmosphere, introducing a carbon source, and depositing pyrolytic carbon on the surface of the material by a gas phase deposition method to obtain a carbon molecular sieve adsorption material. The carbon molecular sieve material is used as an adsorbent by adopting a pressure swing adsorption technology, has high adsorption capacity for nitrogen and high methane-nitrogen selectivity in methane-nitrogen separation application, and has a good industrial application prospect.

This invention relates to the field of carbon dioxide capture technology, and more particularly to a modular vacuum pressure swing adsorption (FPSO) carbon dioxide capture method. The method provides a capture device comprising a pretreatment unit, an adsorption unit, a storage unit, and a control unit. A control model is set in the control unit, which outputs control rate, optimal adsorption parameters, optimal desorption parameters, and equalization cycle parameters, and feeds them back to the actuators of the control unit. The actuators then control the operation of the pretreatment unit, the adsorption unit, and the storage unit. The pretreatment unit cools, compresses, and dries the flue gas. The adsorption unit adsorbs and desorbs CO2 from the flue gas. The desorbed CO2 is stored in the storage unit. This invention improves the efficiency and safety of carbon dioxide capture.

The invention relates to the technical field of PSA hydrogen purification, and discloses a long-operation-cycle PSA device and an operation method thereof.The device comprises a feeding buffer part communicated with feed gas, an adsorption part communicated with the feeding buffer part, and a product gas buffer part and a desorption gas buffer part which are communicated with the adsorption part; the feeding buffer part comprises a tank body, a liquid separation adsorption part arranged in the tank body and a baffle plate for changing the flow direction of gas at a feeding hole; the liquid separation adsorption part comprises an adsorption part and a liquid separation part arranged on the adsorption part in a sleeving manner; according to the device, an adsorbent and a vapor-liquid separation part are coupled in the feeding buffer part, so that the technical effect of simultaneously separating liquid heavy hydrocarbon and crystalline salt is realized; meanwhile, the structures of the adsorption part, the gas-liquid part and the buffer tank body are optimized, so that raw material gas with high content of crystalline salt and liquid heavy hydrocarbon can be treated; and the device is also provided with a washing part at the adsorption part, so that the production continuity is ensured, the crystal salt in the adsorption part is treated, and the operation cycle of the PSA device is obviously prolonged.

The invention provides a preparation method for producing a carbon-based material based on a pyrolysis gas self-energized and self-supplied activating agent, and relates to the technical field of carbon material preparation. Comprising the following steps: pyrolyzing and mixing biomass in a high-temperature pyrolysis carbonization gasification activation furnace and a low-temperature carbonization furnace to obtain mixed pyrolysis gas and a carbon-based material; the mixed pyrolysis gas is divided into a first combustion gas flow and a second combustion gas flow, part of the first combustion gas flow is combusted and supplies heat and a gasification activating agent to the high-temperature pyrolysis carbonization gasification activating furnace, and the rest of the first combustion gas flow is combusted and supplies heat to reforming of the reforming pyrolysis gas. The second combustion gas flow is self-powered and purified to generate reformed gas; cooling the reformed gas step by step, separating the reformed gas into CO2-rich gas and CO + H2-rich gas through pressure swing adsorption, and storing the CO2-rich gas and the CO + H2 The target gas flow is regulated and controlled through a proportional valve, the target gas flow is mixed with high-temperature flue gas generated in the energy supply combustion chamber and self-produced superheated steam generated by combustion of part of the first combustion gas flow to form target high-temperature activated mixed gas, and the target high-temperature activated mixed gas is input into the high-temperature cracking, carbonization and gasification activation furnace to regulate and control the pore structure or interlayer spacing of the carbon-based material to produce the high-value carbon-based material.

The invention discloses a skid-mounted green methanol dynamic preparation system which comprises a double-electrolytic-cell parallel module, a low-concentration COdirect use module, a micro-channel methanol synthesis reactor, a three-state storage and transportation switching unit and an intelligent control module. The system responds to electricity price fluctuation through a double-electrolytic-cell parallel module to intelligently produce hydrogen, low-concentration industrial tail gas is directly treated through a composite membrane separation and pressure swing adsorption combined technology, a micro-channel reactor and a high-performance catalyst are adopted, rapid synthesis of methanol through COO is achieved, a liquid state storage and transportation unit, a gas state storage and transportation unit and a solution state storage and transportation unit are integrated, and energy conservation and emission reduction are achieved. Multi-state switching is achieved through intelligent control, and the problems that in the traditional technology, the wind-light-electricity adaptability is poor, the low-concentration COS utilization threshold is high, the storage and transportation form is single, and response is slow are solved.

The invention relates to the technical field of methane preparation, and discloses a methane preparation system based on carbon dioxide capture coupling electrolytic hydrogen production. According to the system, a trapping module is used for separating and purifying carbon dioxide from industrial waste gas through a pressure swing adsorption technology; the electrolysis module utilizes a proton exchange membrane electrolytic bath to decompose deionized water to generate high-purity hydrogen; the proportioning module is used for accurately mixing carbon dioxide and hydrogen according to the stoichiometric ratio of 1: 4 to form reaction raw materials; the catalysis module performs a Sabatier reaction under the action of a nickel-based catalyst to convert carbon dioxide and hydrogen into methane; the condensation module separates water vapor through cooling condensation to obtain a purified methane product. The technical problems of low system integration level and unstable conversion efficiency caused by lack of accurate control algorithms in the processes of carbon dioxide capture, electrolytic hydrogen production, gas proportioning, catalytic methanation and product separation in the prior art are solved.

The invention discloses a megawatt pressurized bubbling fluidized bed oxygen-enriched combustion test platform and a combustion method. The platform comprises a feeding system, a pressure swing adsorption oxygen production and gas inlet system, a deslagging system, an oxygen-enriched combustion reaction system and a flue gas and fly ash sampling treatment system. The feeding system adopts a spiral and star-shaped double-path independent pressure feeding unit, and is provided with a multi-stage stock bin, a drying device and a pipeline cooling structure, so that pressurized continuous feeding is realized, and tempering is prevented; the pressure swing adsorption oxygen generation and gas inlet system generates oxygen-enriched gas through a PSA technology, and the oxygen-enriched gas is mixed with CO2 to form a graded oxygen-enriched atmosphere; according to the oxygen-enriched combustion reaction system, accurate temperature control is achieved through an air distribution plate, a reducer pipe and a partition heat exchange device, and generation of NOx is restrained; the problems of unstable fuel supply, unreliable deslagging, low combustion efficiency, difficulty in CO2 enrichment and the like under the high-pressure oxygen-enriched combustion condition in the prior art can be effectively solved.

The invention belongs to the related technical field of electrical engineering, and discloses a urea chemical system comprehensive energy scheduling method and system considering multi-energy-mass coupling, and the method comprises the steps: constructing an operation model of each device in a system, the device comprises a water electrolysis hydrogen production device, a pressure swing adsorption device, a biomass gasification hydrogen production device, an electrochemical energy storage device, a hydrogen-doped gas turbine, a carbon capture device, a synthesis ammonia device and a urea synthesis device. Building balance constraints among the devices in the system, wherein the balance constraints comprise electric balance constraints, heat balance constraints, oxygen balance constraints, hydrogen balance constraints and carbon dioxide balance constraints; constructing a cost function; and solving the model by taking the minimum cost function as an optimization target to obtain an optimal scheduling scheme. The energy utilization rate of the rural chemical industrial park can be effectively improved, the carbon emission intensity is reduced, and the cost is reduced.

The invention discloses a methanol water reforming hydrogen production method, and relates to the technical field of hydrogen energy preparation, and the method comprises the following steps: 1) catalytic reforming reaction; and 2) separation and purification. The preparation method comprises the following steps: performing nitrogen doping modification on activated carbon by a hydrothermal method to prepare an N-AC carrier; then Co is preferentially anchored to the carrier at low temperature by utilizing the steric hindrance effect of a cobalt-ammonia complex, and a highly dispersed CoxOy active center is formed through thermal decomposition; and finally, co-dipping Cu and Zn precursors, precipitating and reducing to form a Cu-Zn active center, and constructing a Cu-Zn-CoxOy / N-AC bifunctional concerted catalytic system which is used for hydrogen production by reforming methanol and water. After methanol and desalted water are mixed and gasified, the mixture is introduced into a reforming reactor loaded with a Cu-Zn-CoxOy / N-AC catalyst for reaction, generated reformed gas is subjected to cooling and gas-liquid separation and then is purified through a CO adsorption bed and a pressure swing adsorption system, and high-purity hydrogen is obtained.

The invention relates to the technical field of adsorption, in particular to a device and process for coupling pressure swing adsorption carbon capture and gas combustion waste heat utilization, the device comprises a temperature swing adsorption pretreatment unit and a pressure swing adsorption unit, the temperature swing adsorption pretreatment unit is used for adsorbing and removing impurity components in blast furnace gas, and the pressure swing adsorption unit is used for adsorbing and removing the impurity components in the blast furnace gas; then, high-purity CO2 product gas is obtained through a pressure swing adsorption unit; the residual decarbonized coal gas adsorbed by the pressure swing adsorption unit is converted into high-temperature flue gas, and then the high-temperature flue gas enters the temperature swing adsorption pretreatment unit again for heat recovery, and meanwhile, the heat is utilized to desorb impurity components of the adsorbed blast furnace gas. According to the invention, blast furnace gas pretreatment and a CO2 capture system are combined, so that the recycling of blast furnace gas and the efficient capture of CO2 are realized, the capture efficiency of CO2 is improved, the energy waste is reduced, and the cyclic operation of equipment is realized.