343 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 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.

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 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 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 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 a method and a system for recovering hydrogen in mixed gas by using a pressure swing adsorption and membrane separation method. The method comprises the following steps: S1, preliminary impurity removal: carrying out multi-layer adsorption impurity removal on mixed gas containing silane, disilane and hydrogen, and cooling to 22-28 DEG C; s2, pressure swing adsorption: feeding the mixed gas subjected to primary impurity removal into a pressure swing adsorption device, wherein an adsorbent in the adsorption device is modified activated carbon which is activated at high temperature and is loaded with 3-5% of copper oxide on the surface; s3, membrane separation and adsorption: the mixed gas passing through the pressure swing adsorption device enters a filter and a dryer, and finally passes through a membrane separation device, silane and disilane are collected on the enrichment side of the membrane separation device for further purification, and hydrogen is collected on the permeation side of the membrane separation device for further purification. According to the invention, a process of combining pressure swing adsorption and a membrane separation method is adopted, the advantages of the two technologies are fully exerted, and efficient separation of silane, disilane and hydrogen is realized.

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.

The application discloses a pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, relates to the intelligent blowdown technical field.The pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, comprising the following steps: S1, real-time acquisition operation state data, and pretreatment is carried out to operation state data;S2, operation state data is analyzed to pressure disturbance intensity;S3, through real-time analysis and feature extraction to pressure curve;S4, operation state data is predicted to start-stop risk;S5, comprehensive operation state data, pressure disturbance intensity analysis result and start-stop risk prediction result execute blowdown control instruction.The air compressor and variable pressure adsorption system lack linkage control based on pressure change, blowdown is easy to cause pressure fluctuation and frequent start-stop, which leads to energy consumption increase and equipment wear, and the existing control mode lacks feedforward regulation mechanism.

Method for producing a gas enriched in carbon dioxide from a feed synthesis gas comprising at least one condensable component and in particular hydrogen, characterized in that the method further comprises: a step referred to as a desaturation step during which at least a portion of the condensable component contained in the feed synthesis gas is, upstream of said pressure swing adsorption separation unit, condensed by cooling to a temperature below 10° C., in particular below or equal to 5° C., and separated, producing said desaturated synthesis gas and at least one condensate; the feed synthesis gas exchanging heat with the desaturated synthesis gas so as to heat said desaturated synthesis gas.

This paper discloses a rapid cyclic pressure swing adsorption (PSA) method for separating O2 from N2 and / or Ar. The method uses a carbon molecular sieve (CMS) adsorbent with a driving force of 1 atma and 86 atma, as indicated by a linear driving force model. o F measures at least 5% O2 / N2 and / or O2 / Ar kinetic selectivity and at least 0.2000% O2 adsorption rate (1 / s).

The invention relates to an energy optimization system for natural gas hydrogen production, compressed air energy storage and air direct carbon capture coupling, which comprises a natural gas steam reforming system, an outlet of a water supply preheater is connected with an inlet of a steam generator, and an outlet of the steam generator is connected with an inlet of a reaction gas preheater; an outlet of the reaction gas preheater is connected with an inlet of the reforming reactor, an outlet of the reforming reactor is connected with an inlet of the water vapor generator, and an outlet of the water supply preheater is connected with an inlet of the hydrogen pressure swing adsorption bed; according to the flue gas carbon capture system, an inlet of a flue gas cooler is connected with an outlet of a water vapor generator, and an outlet of the flue gas cooler is connected with an inlet of a flue gas carbon dioxide separation device; according to the compressed air energy storage and air direct carbon capture coupling system, an outlet of a compressed air cooler is connected with an inlet of a carbon dioxide pressure swing adsorption device, and an outlet of the compressed air cooler is connected with an inlet of a reaction gas preheater.

The invention relates to the technical field of gas separation, and discloses an impurity-interference-resistant low-concentration CO2 pressure swing adsorption purification process which comprises the following steps: S1, adsorption step: introducing raw material gas containing impurities and CO2 into a main adsorption tower filled with a composite adsorbent under adsorption pressure, so that CO2 is selectively adsorbed, and purified tail gas is obtained; s2, regenerating: regenerating the main adsorption tower, namely S2.1, equalizing and reducing pressure: discharging gas in the main adsorption tower, and recovering pressure energy; s2.2, vacuumizing: carrying out vacuum desorption on the main adsorption tower to obtain a CO2 product gas; the composite adsorbent with a gradient structure is adopted, a hydrophobic shell of the composite adsorbent effectively blocks water erosion, and acidic impurities such as SOx and NOx are preferentially and chemically fixed on an inner layer, so that high-selectivity adsorption of a core amino site to CO2 is protected, and the poisoning resistance and long-term stability under complex flue gas conditions are remarkably improved.

The present application relates to a kind of six-tower pressure swing adsorption capture carbon dioxide in calcination furnace flue gas method, comprising: adsorption stage;First equalization;Second equalization;Order release stage;Reverse release stage;Flushing stage;Final rise stage, 6 towers are sequentially staggered timing according to 1~6, each interval switches once process, form continuous operation system, core logic is attached to carbon capture "adsorption enrichment, desorption recovery" core demand, give consideration to purity and recovery rate, ensure industrial waste gas continuous input, product continuous output, by controller automatically adjusts each process time, guarantee system stable operation.The present application ensures industrial waste gas continuous input, product continuous output, carbon capture regulation is flexible, energy-saving effect is remarkable, multiple tower operation stability is strong, integration degree is high and environmental protection benefit is remarkable, compact structure, small footprint, reduce greenhouse gas emissions, give consideration to environmental protection requirement and economic benefit.

This disclosure relates to systems and methods for removing CO2 from flue gas. The system includes a first heat exchanger for receiving and cooling the flue gas, a compressor for increasing the pressure of the cooled gas, a second heat exchanger to further cool the compressed gas, and a drying unit for removing water from the cooled compressed gas. The system further includes a pressure swing adsorption unit for adsorbing CO2 from the dried, cooled compressed gas using an adsorption media, the adsorption unit comprising a vacuum compressor for pulling the CO2 off the adsorption media. A compressor may be used for extracting the CO2 from the tank and boosting the pressure of the CO2 gas.

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.

Hydrogen reforming system, comprehensive: a reformer (100) which produces a first mixed gas by means of a reforming reaction between fuel gas and water; a transformer (200) which is fed with the first mixed gas and produces a second mixed gas from which carbon monoxide is removed by means of a water-gas shift reaction; a unit (300) for pressure swing adsorption (PSA) that cleans and separates hydrogen from the second mixed gas generated in the transformer and discharges hydrogen-free exhaust gas; a heat exchanger (400) provided between the reformer and the transformer and between the transformer and the pressure swing adsorption (PSA) unit to control the temperatures of the first mixed gas and the second mixed gas by means of heat exchange with water; a water feeder (500) that communicates with the heat exchanger and supplies water to the heat exchanger and supplies the water exiting the heat exchanger to the reformer; and a control valve (600) which is provided on a line through which water is discharged from the water supply and which adjusts a flow rate of water supplied to the heat exchanger in order to control the first mixed gas and the second mixed gas separately, wherein the heat exchanger (400) comprises a first heat exchanger (410) provided between the reformer (100) and the transformer (200) in which heat exchange takes place between the first mixed gas and water; and a second heat exchanger (420) and a third heat exchanger (430) provided between the transformer (200) and the PSA unit in which heat exchange takes place between the second mixed gas and water, and wherein the water supply (500) comprises a first supply line (510) connected to and supplying water to the first heat exchanger (410), a second supply line (520) connected to and supplying water to the second heat exchanger (420), and a third supply line (530) connected to and supplying water to the third heat exchanger (430), thereby allowing the temperatures of the first mixed gas and the second mixed gas to be controlled separately, wherein the control valve (600) comprises a first control valve (610) provided on the first supply line (510) to control a flow rate of water flowing through the first supply line, and a second control valve (620) provided on the third supply line (530) to control a flow rate of water flowing through the third supply line (530), thereby separately controlling the flow rates of water flowing through the first supply line (510) and the third supply line (530).

The present disclosure relates to a pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and a hydrogen purification method using the same, and more particularly, the pressure swing adsorption apparatus of the present disclosure includes a plurality of adsorption towers including a pretreatment unit and a hydrogen purification unit wherein the adsorption towers of the pretreatment unit and the hydrogen purification unit are packed with different adsorbents, thereby achieving high purity hydrogen purification from mixed hydrogen gas produced after ammonia decomposition, making it easy to replace the adsorbent for ammonia removal, minimizing the likelihood that the lifetime of the adsorbent in the hydrogen purification unit is drastically reduced by a very small amount of ammonia, and actively responding to a large change in ammonia concentration in the raw material.Additionally, a hydrogen purification method using the pressure swing adsorption apparatus of the present disclosure physically adsorbs and removes impurities such as moisture (H2O), ammonia (NH3) and nitrogen (N2) included in mixed hydrogen gas produced after ammonia decomposition below extremely small amounts, thereby achieving high purity hydrogen purification with improved selective adsorption of moisture, ammonia and nitrogen and maximized hydrogen recovery rate and productivity. In addition, since the temperature swing adsorption process is not introduced, there is no need for a heat source for regeneration, thereby reducing the driving cost.

The application provides a hydraulic pressure compacting adsorption tower structure with a detection feedback function, and mainly relates to the technical field of pressure swing adsorption equipment. The hydraulic pressure compacting adsorption tower structure with the detection feedback function comprises an adsorption tower cylinder, an upper cover and a hydraulic pressure compacting module. The upper cover is detachably fixed at the top end of the adsorption tower cylinder through a bolt assembly. The adsorption tower cylinder is filled with granular molecular sieve. A sieve plate, a stainless steel wire mesh pad and a pressing plate are sequentially stacked in the axial direction above the molecular sieve. The detection end of an electric contact pressure gauge is in communication with the piston cavity of the hydraulic pressure compacting module, and the signal output end thereof can be externally connected to a PLC control system to realize pressure alarm and compacting state feedback. The structure is widely applied. The hydraulic pressure compacting module has the advantages of manual compacting, low cost, high reliability, large compacting force, good stability, adjustable design of the compacting rod length, oil leakage prevention, double anti-reverse prevention and the like. Moreover, the compacting state can be monitored and fed back in real time, and the invalidation of the molecular sieve can be effectively avoided.

The invention relates to a pressure swing adsorption type nitrogen generator and a preparation method, and relates to the technical field of nitrogen preparation, the pressure swing adsorption type nitrogen generator comprises a nitrogen preparation device, the nitrogen preparation device comprises a first adsorption tower and a second adsorption tower which are designed to alternately prepare nitrogen, and gas outlets of the first adsorption tower and the second adsorption tower communicate with each other through a connecting pipeline; the middle part of one side of the connecting pipeline is communicated with a gas outlet pipeline communicated with the nitrogen storage tank, so that two lagging sections are formed between the gas outlet pipeline and the two gas outlets and are used for intercepting nitrogen containing residual oxygen, and the gas outlets of the first adsorption tower and the second adsorption tower are provided with oxygen detection pieces; a reverse pressurizing pipeline communicated with the reverse pressurizing pipeline is arranged between the carbon molecular sieve filling block and the gas outlet pipeline on the other side of the lagging section, and through the reverse pressurizing pipeline, the preparation purity of nitrogen can be improved, the pressure difference can be increased, the desorption rate of the adsorption tower can be increased, and the purity of nitrogen prepared in the next process can be improved.

The present application relates to a process for producing synthetic ammonia by using hydrogen-containing tail gas, comprising the following steps: S1: sodium cyanide tail gas is pressurized, then heated and water-cooled. S2: the impurity-removed tail gas is desulfurized. S3: the desulfurized tail gas is mixed with chlor-alkali tail gas, the mixed gas is heated and deoxidized. S4: the deoxidized tail gas is pressurized and enters a PSA (pressure swing adsorption) device for pressure swing adsorption treatment, obtaining high-purity hydrogen. In the PSA device, dehydrating, carbon dioxide, methane, carbon monoxide and nitrogen adsorbents are sequentially arranged. The carbon dioxide adsorbent is activated carbon modified by carbonate and strong alkali, and the nitrogen adsorbent is 13X zeolite molecular sieve modified by Na + and Ba 2+ and Ca 2+ ion exchange. S5: nitrogen reacts with the high-purity hydrogen obtained in step S4 to generate ammonia. The present application can improve the adsorption capacity of the adsorbent for impurity gas, thereby reducing the replacement frequency of the adsorbent, prolonging the service period and service life of the adsorbent, and improving the production efficiency.

The application discloses a system for preparing liquefied natural gas by hydrogen supplementing of coal gas in medium-low temperature pyrolysis, which comprises a water electrolysis hydrogen production device, a methane synthesis device, a coal pyrolysis furnace, a coal gas reforming device, a pressure swing adsorption hydrogen extraction device and a deep cooling liquefaction device; the water electrolysis hydrogen production device is connected with an inlet of the methane synthesis device; a pyrolysis gas outlet and a semi-coke outlet of the coal pyrolysis furnace are connected with an inlet of the coal gas reforming device, and an outlet of the coal gas reforming device is connected with an inlet of the methane synthesis device; an outlet of the methane synthesis device is connected with an inlet of the pressure swing adsorption hydrogen extraction device, and the pressure swing adsorption hydrogen extraction device is connected with the deep cooling liquefaction device. The application realizes the collaborative conversion and integrated innovation of the medium-low temperature coal pyrolysis process and the water electrolysis hydrogen production process, develops and enriches product types and additional values, and has no technical barriers in equipment or devices, and is convenient for industrialization or large-scale application.

A method for upgrading biogas comprising methane and nitrogen, where the biogas is provided in at least one pressurized vessel at a pressure of at least 65 atm (6586 kPa). The method includes a pressure swing adsorption (PSA) cycle having a feed phase, where biogas is fed into a first adsorbent bed when the inlet end is open and the outlet end is closed, followed by a first depressurization phase, where a gas enriched in methane is withdrawn through the outlet end with the inlet end being closed. This gas enriched in methane can be pipeline quality and at pipeline pressures. A methane recovery phase is provided, which can improve methane recovery, wherein gas is withdrawn and the pressure drops to one or more lower values, and where this gas can be recycled for use in the feed phase, used in a regeneration phase, and / or fed to a second bed.

The invention relates to the technical field of industrial oxygen production, and particularly discloses a turbine pressure swing adsorption oxygen production device and a use method thereof.The device comprises an air pressurization module, an adsorption separation module, an energy recovery module, a product pressure stabilization and pressurization module and a control module; air separation oxygen generation is achieved through periodic adsorption and desorption of an adsorption tower in the adsorption separation module, and meanwhile the energy recovery module is used for converting pressure potential energy of impurity gas in the desorption process into mechanical energy so as to supply energy to the air pressurization module or generate electricity outwards. According to the use method, continuous oxygen production and energy recovery are realized through a circulation process of multi-tower alternate adsorption, desorption, pressure equalizing and flushing. The energy recovery module is communicated with the desorbed gas outlet of the adsorption separation module and is used for converting the pressure potential energy of the impurity gas discharged in the desorption process of the adsorption tower into mechanical energy, so that energy is recovered from the waste gas, and the energy consumption is reduced.

The invention relates to the field of adsorbents, and discloses an air separation adsorbent as well as a preparation method and application thereof. The air separation adsorbent comprises 86-98% by mass of an inner adsorbent layer and 2-14% by mass of an outer adsorbent layer wrapping the surface of the inner adsorbent layer. On the basis of the total amount of the air separation adsorbent, the inner adsorbent layer comprises 60-76% by mass of a low-silicon X molecular sieve and 21-37% by mass of a first binder, and the outer adsorbent layer comprises a second binder; cation sites of the low-silicon X molecular sieve in the air separation adsorbent are IA group metal ions. The air separation adsorbent comprises an inner adsorbent layer and an outer adsorbent layer wrapping the surface of the inner adsorbent layer, the air separation adsorbent is used for nitrogen / oxygen gas separation, high separation performance and strength are achieved, and the problem that the adsorbent is prone to smashing in the pressure swing adsorption process is effectively solved.

The application is suitable for the technical field of chemical waste gas treatment, and provides a low-energy-consumption hydrogen peroxide production waste gas deep treatment process and device, wherein the low-energy-consumption hydrogen peroxide production waste gas deep treatment process comprises the following steps: S1, constructing a first evaluation model: constructing according to the ratio of the temperature difference between the inlet and outlet of the condenser and the energy consumption of the refrigerating machine, the pressure fluctuation variance of the pressure swing adsorption unit and the pressure fluctuation frequency of the pressure swing adsorption unit; outputting a device health comprehensive index through the first evaluation model; S2, constructing a second evaluation model: constructing according to the collected recovery hydrogen flow, the unit waste gas treatment quantity power consumption, the change rate of the oxygen content and the concentration ratio; outputting an energy efficiency economic comprehensive index through the second evaluation model. In the application, when the system efficiency comprehensive index is lower than a preset threshold value, the optimization condensing temperature is outputted by the regulation and control model, so as to avoid the refrigeration overload or insufficient treatment caused by the traditional fixed temperature setting value under the environmental temperature fluctuation.

The application discloses an energy-saving nitrogen production equipment and method with pressure swing adsorption function, and relates to the technical field of nitrogen production. The application comprises a nitrogen production tank, further comprises a partition disc and a top sealing disc fixedly installed in the nitrogen production tank, and a partition plate fixedly installed between the partition disc and the top sealing disc for partitioning the nitrogen production tank into a first nitrogen production area and a second nitrogen production area; the first nitrogen production area and the second nitrogen production area are both provided with a nitrogen production assembly; a pressure swing adsorption unit comprises a gas guiding assembly and a pressure increasing assembly; and an equalizing desorption unit comprises a gas storage assembly and a stamping assembly. The application has the advantages that the alternate operation of the first nitrogen production area and the second nitrogen production area can effectively improve the production capacity, the gas flow direction can be flexibly controlled during the nitrogen production, the oxygen and nitrogen separation effect is enhanced by self-pressurization, the gas production efficiency is improved, the residual pressure energy can be recycled and utilized to realize the equalization of the pressure of the first nitrogen production area and the second nitrogen production area, the discharge of the oxygen-rich tail gas is accelerated in the pressure relief stage, the operation energy consumption is effectively reduced, and the energy-saving effect is remarkable.

Disclosed herein is an apparatus and method for providing a direct air capture (DAC) system of carbon dioxide to improve the energy efficiency, operability, and economic performance of DAC technologies based on multiple types of methods, including thermal swing adsorption (TSA), pressure swing adsorption (PSA), and moisture swing adsorption (MSA). In particular, disclosed herein is a DAC apparatus comprising a first water extraction unit, a process unit comprising a second water extraction unit, a carbon dioxide capture unit, and a water release unit. The present invention also provides a logic control system for a preconditioner of the proposed DAC apparatus, comprising a controller and one or more control elements in communication with a fluid stream, wherein the controller is configured to adjust the temperature, water content, or a combination thereof of the second fluid stream, the third fluid stream, or both to a predetermined range based on the cost of capturing carbon dioxide on a net removal basis.

The application provides a high-temperature pressure swing adsorption pure oxygen production equipment, which comprises a filter, an inlet of the filter is connected with an air pipeline, an outlet of the filter is connected with an inlet of a blower, an outlet of the blower is connected with an inlet of an air buffer tank, the blower is connected with a frequency converter, an outlet of the air buffer tank is connected with a first inlet of an adsorption tower, a second inlet of the adsorption tower is connected with an outlet of an oxygen back flushing tank, an outlet of the adsorption tower is connected with an inlet of a vacuum pump, an inlet of the oxygen back flushing tank is connected with an outlet of an oxygen buffer tank, the oxygen buffer tank is connected with an oxygen analyzer or a chromatograph and an oxygen flow meter, an outlet of the oxygen buffer tank is connected with an air outlet pipeline, and an outlet of the vacuum pump is connected with the air outlet pipeline. The application uses the principle of pressure swing adsorption, proposes a novel pressure swing adsorption process and equipment, breaks through the limitation of product oxygen purity, and obtains oxygen with a purity of ≥99.5%, thereby expanding a new application field of the pressure swing adsorption oxygen production process.