161 results about "Adsorption desorption" patented technology

The invention discloses a zeolite adsorption and desorption integrated treatment system, and particularly relates to the field of zeolite separation treatment, and the zeolite adsorption and desorption integrated treatment system comprises a process sensing module, a dynamic partition control module, a global optimization control module and a cooling regeneration module. According to the zeolite adsorption and desorption integrated treatment system, the problem of blind operation in the traditional technology is solved through the process sensing module, a data basis is provided for dynamic partition, the intelligent monitoring level is improved, and the performance of an adsorbent is fully exerted; the problem of non-uniform heat and mass transfer of a bed layer is effectively solved through the dynamic partition control module, the desorption heat utilization efficiency is improved, and meanwhile, the service life of an adsorbent is prolonged; a dynamic optimization function is constructed through the global optimization control module, energy consumption, solvent recovery income and stability are comprehensively considered, self-adaptive adjustment of operation parameters is achieved, the energy consumption is reduced while the processing efficiency is guaranteed, and the environmental benefits are remarkably improved.

The invention discloses a method for extracting and purifying flavone in litsea coreana through an ultrasonic-assisted eutectic solvent, and belongs to the technical field of green processing of natural products. The invention provides a method for efficiently preparing litsea coreana flavone by integrating computer prediction, green solvent extraction and resin purification technologies. The method comprises the following steps: firstly, calculating and screening a deep eutectic solvent system with the highest affinity with the litsea coreana flavone on the basis of a COSMO-RS theoretical model, then coupling the optimized DES with an ultrasonic-assisted extraction (UAE) technology, and through the synergistic effect of the DES and the UAE technology, remarkably improving the extraction rate of the litsea coreana flavone and furthest keeping the biological activity of a target component; then, a macroporous resin dynamic adsorption-desorption purification process is linked, so that high-selectivity enrichment and impurity removal of the flavonoid compounds in the crude extract are realized, a high-purity product is obtained, and a complete process route from intelligent screening, efficient extraction to precise purification is finally formed.

The invention discloses a carbon dioxide trapping method which comprises the steps of feeding, adsorption, material replacement, primary desorption and secondary desorption, in the material replacement step, after the replacement process of a single adsorption and desorption unit lasts for M, a valve of the adsorption and desorption unit is closed, and the replacement process is repeated after the replacement process is stopped for (N-1) M, n is the total number of the adsorption and desorption units arranged in parallel, in the process that a single adsorption and desorption unit stops running, the pipe chain conveyor continuously runs, the other adsorption and desorption units alternately carry out solid amine material replacement, and the replacement time and the stop time are equal; according to the two-stage desorption, carbon dioxide in a solid amine material is fully desorbed through high-temperature desorption and negative-pressure desorption, a plurality of adsorption and desorption units alternately perform replacement so that the equipment can continuously run, the efficiency of the carbon dioxide trapping process is improved by combining the two-stage desorption operation, and the cost loss caused by the vacuum period of the equipment in the trapping process is reduced. The invention further discloses a carbon dioxide trapping device.

The invention relates to the technical field of coal bed gas development, and particularly discloses a numerical simulation method for multi-field coupling and microwave enhanced drainage and mining of a deep coal bed, which realizes accurate simulation of the whole process of drainage and mining of deep coal bed gas through six key steps: firstly, obtaining a coal bed parameter system; establishing a temperature coupling adsorption and desorption model, and quantifying the influence of the high ground temperature environment on the gas occurrence by correcting a Langmuir equation; constructing a dual-medium heat-gas-liquid-solid full-coupling control equation set which covers coal deformation, gas-water two-phase seepage, heat transfer and electromagnetic field equations; a microwave heat effect model is defined, and electromagnetic energy-heat energy conversion is calculated through a dielectric constant mixing model; deducing a porosity / permeability dynamic evolution equation, and coupling effective stress, matrix shrinkage and a thermal expansion effect; and finally, a COMSOL Multiphysics platform is adopted to realize multi-field coupling solution, and a productivity index is calculated through well circumference integration. According to the method, the inherent limitation of a static parameter model is overcome, and the precision and efficiency of numerical simulation are remarkably improved.

The invention provides a method for decomposing and mineralizing fluorine-containing organic matter wastewater, which is applied to the technical field of treatment of fluorine-containing organic matter wastewater generated in a perfluoroether elastomer emulsion flocculation process, and comprises the following steps: S1, carrying out adsorption and desorption treatment on the fluorine-containing organic matter wastewater to obtain a concentrated solution of the fluorine-containing organic matter wastewater; s2, hydrogen peroxide and ferrous ions are added into a container containing the concentrated solution to obtain a mixed solution, the pH of the mixed solution is adjusted to be 2-4, the concentration mass ratio of the hydrogen peroxide to organic matter contained in the fluorine-containing organic matter wastewater is 1: 1-2, the molar ratio of the hydrogen peroxide to the ferrous ions is 1-6: 1, micro-nano bubbles are introduced into the mixed solution, and ultrasonic treatment is conducted; s3, calcium hydroxide is added into the treated mixed solution, calcium fluoride precipitates are obtained through centrifugal treatment, and the fluorine-containing organic matter in the wastewater can be degraded and mineralized.

The invention discloses an adsorption / desorption device for salt lake adsorption and lithium extraction and application thereof.The adsorption / desorption device for salt lake adsorption and lithium extraction comprises an adsorption and desorption column, an adsorbent containing area used for containing an adsorbent is arranged in the adsorption and desorption column, and a positive electrode and a negative electrode are oppositely arranged in the adsorbent containing area; the positive electrode and the negative electrode are connected through a direct-current power supply capable of reversing poles, a variable electric field can be formed during pole reversing, and the variable electric field can drive lithium ions to migrate and accelerate desorption of the lithium ions from an adsorbent, so that the lithium ion desorption efficiency is favorably improved, the concentration of the lithium ions in a desorption solution is higher, fresh water is saved, and the service life of the lithium ion battery is prolonged. And time and energy consumption are saved for subsequent concentration of lithium ions. The adsorption / desorption device for adsorbing and extracting lithium in the salt lake is simple in process flow and simple and convenient to operate, can effectively improve the desorption efficiency and save working hours, energy and fresh water, and has practical significance on utilization of lithium resources in the salt lake.

The invention discloses a dynamic tracking adsorption testing device and method adaptive to different carbon dioxide partial pressure adsorption properties of multi-scene adsorbents, and solves the problems that an existing device cannot dynamically track the adsorption process and lacks a standard processing device and method for multi-parameter linkage analysis. The dynamic tracking adsorption testing device comprises a reaction master control, a self-regulation gas supply system and a gas analysis system, the gas inlet end of the reaction master control is communicated with the self-regulation gas supply system, and the gas outlet end of the reaction master control is communicated with the gas analysis system; the dynamic tracking adsorption test method comprises the following steps: performing vacuum activation pretreatment on a test sample, adsorbing and desorbing to obtain mass change in an adsorption stage and import and export concentration data, and establishing a triple adsorption quantity calculation model based on the mass change in the adsorption stage and the import and export concentration data; and completing an adsorption cycle stability test process according to the triple adsorption capacity calculation model after data analysis.

The invention relates to a uranium migration prediction model based on particle swarm optimization and application of the uranium migration prediction model in uranium migration prediction in granite fractures. According to the method, by introducing a retention coefficient and an exponential decay item coupled with pH sensitivity, solute retention behaviors of a fissure domain and a matrix domain are dynamically corrected, and accurate description of adsorption / desorption, precipitation and re-release processes of U (VI) under an acid-alkali condition is realized. Parameter inversion is performed on the model by combining a particle swarm optimization (PSO) algorithm, so that the calculation efficiency and the prediction precision are remarkably improved. Experimental verification shows that the model has high stability and reliability (SSE is smaller than or equal to 0.026, RMSE is smaller than or equal to 0.045, and Error is smaller than or equal to 2.82%) under various pH, pressure and temperature conditions, and an efficient and interpretable analysis tool is provided for uranium migration risk assessment in the deep geological disposal environment.

To provide a water generator which can be miniaturized and can suppress power consumption.SOLUTION: The water generator 1 includes an adsorption / desorption unit container 13 that houses the adsorption / desorption unit 11, a compressed air supply section 15 that supplies compressed air to the adsorption / desorption unit container 13, a degassing section 17 that recovers gas in the adsorption / desorption unit container 13, and a water recovery section 19 that recovers water from the gas in the adsorption / desorption unit container 13 recovered by the degassing section 17.SELECTED DRAWING: Figure 1

The invention relates to the technical field of water treatment and purification engineering, in particular to a biological activated carbon in-situ adsorption capacity evaluation and failure prediction method based on an adsorption-regeneration coupling kinetic model, which comprises the following steps: collecting monitoring data in the operation process of target biological activated carbon in real time; the monitoring data are input into a pre-constructed dynamic coupling kinetic model, the instantaneous adsorption capacity of the target biological activated carbon is calculated, the adsorption site availability rate change trend and the adsorption capacity change curve are obtained, the failure critical value is calculated, and the dynamic coupling kinetic model is used for determining the adsorption capacity of the target biological activated carbon through coupling water phase-adsorption phase-biological phase material balance. And the whole process of mass transfer migration, adsorption-desorption, microbial degradation and adsorption site regeneration of the biodegradable organic carbon and the non-biodegradable organic carbon in the biological activated carbon filter is quantitatively described. The in-situ adsorption capacity of the biological activated carbon is dynamically evaluated in real time based on a microorganism regeneration mechanism, and high-precision prediction of activated carbon failure is achieved.

The present invention provides an atmospheric water extraction device and operating method based on hygrochromic drive. The device is composed of a hygrochromic material, a graphene coating, a radiative cooling coating, and a water collection chamber. The present invention utilizes the changes in the spectral properties of the hygrochromic material during the water adsorption-desorption process to effectively reflect or fully transmit sunlight to control the temperature of the hygrochromic material, thereby realizing an atmospheric water extraction process that is completely driven spontaneously by humidity and temperature. Graphene is used as the bottom coating of the hygrochromic material, and its excellent photothermal capacity is utilized to promote the desorption process of water in the hygrochromic material. A radiative cooling coating is used to cool the top surface of the water collection chamber to promote the condensation and collection process of water vapor. The present invention does not require sunshade equipment, manual intervention, or additional power input, and can spontaneously control the adsorption and desorption processes in atmospheric water collection. It has great application prospects in water collection in arid areas.

The utility model provides an adsorption and desorption tank which comprises a tank body, the tank body is vertically arranged, the upper end and the lower end of the tank body are respectively connected with an upper sealing head and a lower sealing head, the lower sealing head is connected with a three-way pipe, the upper sealing head is connected with a discharging pipe and an air inlet pipe, a supporting plate with holes is arranged at the lower end in the tank body, and a pressing plate with holes is arranged at the upper end in the tank body. A molecular sieve adsorption and desorption agent is filled between the porous supporting plate and the porous pressing plate; a bracket is further fixedly connected into the lower end socket, and the supporting plate with the holes abuts against the bracket. According to the utility model, the problem that the production cost is increased due to reduction of the normal propyl alcohol recycling amount caused by excessive water content in the prior art is solved. The utility model also provides a device for removing water in n-propyl alcohol, which comprises a pair of the adsorption and desorption tanks, and the two adsorption and desorption tanks are combined to alternately perform adsorption and desorption processes, so that the continuity of dehydration operation is ensured, and the overall production efficiency can be further improved.

The application discloses a kind of zeolite molecular sieve adsorption desorption VOCs waste gas processing device and processing method, it is related to waste gas treatment technical field.The zeolite molecular sieve adsorption desorption VOCs waste gas processing device and processing method, including shell, the shell is divided into adsorption zone, desorption zone and cooling zone, further including fan-shaped zeolite piece, be located in shell interior, multiple fan-shaped zeolite piece splicing is formed into circular zeolite runner;Shaft, the shaft is located in the middle of zeolite runner, fan-shaped zeolite piece can be moved on the shaft along axial direction.This application is spliced into circular zeolite runner by setting multiple fan-shaped zeolite piece, under the cooperation of sliding part and guide groove, control the axial stagger of two fan-shaped zeolite pieces in adjacent when being located in desorption zone and cooling zone along zeolite runner, increase the contact area of fan-shaped zeolite piece and hot air and cooling air, beneficial to realize efficient desorption and cooling.

A device and a method for maintaining the stability of anaerobic ammonium oxidation (anammox) by using a combined zeolite filler to resist water quality fluctuations are provided. The device includes a water inlet tank, an anammox reactor, and a water outlet tank, where the anammox reactor is filled with the combined zeolite filler maintained in a state of suspension, domestic sewage enters the anammox reactor through a water inlet pump, and effluent water enters the water outlet tank through an overflow port. The device combines the physical characteristics of zeolite adsorption of ammonium with the anammox process: when the concentration of ammonium in the influent water is too high, the zeolites will temporarily store the excess ammonium adsorbed; when the concentration of nitrite in the influent water is too high, the zeolites are capable to release the stored ammonium into a liquid phase through balanced adsorption desorption.

The invention belongs to the technical field of adsorption type atmospheric water collection, and particularly discloses a modified fly ash / porous sponge composite material and a preparation method and application thereof, and the method comprises the following steps: S1, carrying out surface modification on fly ash; step S2, carrying out pretreatment on the melamine sponge; s3, preparing the modified fly ash / porous sponge composite material. According to the modified fly ash / porous sponge composite material and the preparation method and application thereof, the prepared modified fly ash / porous sponge composite atmospheric water collection material has excellent adsorption and desorption performance, and the adsorption capacity of the modified fly ash / porous sponge composite atmospheric water collection material under the relative humidity of 60% reaches 2.68 g <-1 >; the material has fast adsorption and photo-thermal desorption capability, has good recyclability, and can be used for collecting water in the atmosphere.

The present invention relates an alkanolamine / amine-grafted metal-organic framework-based carbon dioxide adsorbent and, more specifically, to an alkanolamine / amine-grafted metal-organic framework-based carbon dioxide adsorbent that can effectively reduce renewable energy generated in the process of adsorption and desorption of carbon dioxide, and maintain structural stability against moisture present in exhaust gas, thereby being capable of effectively capturing carbon dioxide in an actual fluidized bed. According to the present invention, it is possible to provide a carbon dioxide adsorbent capable of maintaining structural stability against changes in adsorption / desorption temperatures and moisture.

The utility model discloses a carbonization and activation system for preparing a coal pitch-based porous material, which comprises a high-pressure gas cylinder for outputting a gas source, a gas output end in the high-pressure gas cylinder is connected with an input end of a tubular reactor after being decompressed, and a tail output end of the tubular reactor is connected with an input end of a condenser through a heat tracing pipeline; the bottom output end of the condenser is connected with the product discharge system, the top product output end of the condenser is connected with the adsorption and desorption system, and the top output end of the adsorption and desorption system outputs exhaust gas. The device has the structural characteristics of preventing equipment from being blocked and treating polluted tail gas.

The invention discloses a shale gas recoverable reserve determination method and device and a storage medium, and relates to the technical field of shale gas exploitation. The method comprises the following steps: fitting parameters such as a dynamic desorption lag index, a surface site occupancy rate, an adsorption equilibrium constant, an adsorption phase volume maximum value and the like by utilizing shale gas reservoir parameters, experiment numbers of at least six groups of adsorption and desorption experiments and an adsorption and desorption model comprising the dynamic desorption lag index subjected to temperature and pressure changes; different pressure, temperature and excess adsorption capacity are used as fitting variables in the fitting process, so that the fitted parameters, especially the dynamic desorption lag index, can capture the relationship between the desorption lag effect and the temperature and pressure variables, and the relationship between the desorption lag effect and the temperature and pressure variables can be obtained. Therefore, the determination precision of the real gas adsorption amount of the target reservoir under different temperature and pressure conditions is remarkably improved, the recoverable reserves of the shale gas of the target reservoir are determined more accurately, and the accuracy of determining the recoverable reserves is improved.

The utility model discloses a variable-temperature and variable-pressure adsorption and desorption waste gas recovery system, which belongs to the field of waste gas treatment and comprises an adsorption and desorption tower, the adsorption and desorption tower is of a double-layer structure with an inner cavity and an outer cavity which are mutually independent, and an adsorbent is arranged in the inner cavity; the adsorption and desorption tower is connected with a waste gas inlet pipe and a waste gas discharge pipe which are communicated with the inner cavity, the waste gas discharge pipe is connected with a main fan, and adsorption valves are mounted on the waste gas inlet pipe and the waste gas discharge pipe; the adsorption and desorption tower is connected with a nitrogen inlet pipe and a desorption pipe which are communicated with the inner cavity, a nitrogen valve is mounted on the nitrogen inlet pipe, a vacuum pump and a condenser are sequentially mounted on the desorption pipe in the airflow direction, and the condenser is further connected with a liquid storage tank; the adsorption and desorption tower is connected with a steam inlet pipe and a steam discharge pipe which are communicated with the outer cavity, and steam valves are mounted on the steam inlet pipe and the steam discharge pipe. According to the utility model, the desorption efficiency can be improved, and the adsorption efficiency can be improved.

The invention discloses ultra-microporous synergistic powder for tank mixing of pesticides as well as a preparation method and application of the ultra-microporous synergistic powder, and belongs to the technical field of functional auxiliary agents of the pesticides. The powder takes a natural porous material as a raw material, is prepared through raw material pretreatment, inert atmosphere high-temperature calcination activation, superfine grinding and homogeneous compounding, and contains 85-98% of superfine porous powder, 1-10% of a dispersing agent and 1-5% of a wetting penetrant. The key of application is that the barrel mixing sequence of diluting the pesticide and then adding the powder is adopted, the adding amount is 1%-5% of the total weight of the pesticide liquid, the powder can efficiently adsorb effective components of the pesticide, and the light stability and the lasting period of the pesticide are remarkably improved through the ultraviolet shielding effect and the adsorption-desorption slow release effect of the ultra-micropore structure. The product and the using method are specially designed for terminal users, operation is easy and convenient, and efficiency is remarkable.

The application belongs to the technical field of environmental monitoring and chemical analysis, and discloses a kind of all-hydrocarbon quantitative collection gas path device and adsorption desorption coupling method, including collection tank on support frame, gas inlet and outlet component for gas, monitoring component for monitoring pressure in monitoring tank and pressure relief valve for maintaining adsorption pressure, and filter component connected through quick release structure in tank and conveying component for accelerating gas desorption.The device effectively solves the problems of complicated operation, disassembly and assembly inconvenience in traditional methods, improves maintenance efficiency and reduces operation burden;By realizing quantitative collection and real-time air pressure regulation, the data accuracy and reliability are significantly improved;At the same time, reasonable gas path design shortens the collection time and reduces the interference of external impurities, so as to fully meet the core needs of modern environmental monitoring for high efficiency, accuracy and convenience.

The invention discloses a full-temperature-range liquid phase temperature swing adsorption process for deep dehydration and impurity removal of dioxolane, which mainly comprises the steps of raw material flow, temperature swing adsorption purification, temperature swing adsorption desorption and rectification concentration. Dioxolame with the purity of 99.9%, the water content of 500-1000 ppm, 100-300 ppm of micromolecular impurity components such as formaldehyde / methanol and the like, and the content of macromolecular impurity components such as ethylene glycol, hemiacetal, paraformaldehyde and the like is greater than or equal to 100 ppm is purified into dioxolame with the purity of greater than or equal to 99.999%, the water content is less than or equal to 100 ppm, the water content is less than or equal to 100 ppm, the water content is less than or equal to 100 ppm, and the water content is less than or equal to 100 ppm. The content of micromolecular impurity components of formaldehyde and methanol is smaller than or equal to 100 ppm, the content of macromolecular impurity components of ethylene glycol, methylal and paraformaldehyde is smaller than 50 ppm, the problems that the purity of products obtained through existing methods such as special rectification, extractive rectification and membrane separation does not reach the standard, and energy consumption and cost are high are solved, the process is simple, import is replaced, and the method is suitable for industrial production. And the quality requirement of the polymer-grade dioxolame required by polyformaldehyde production is met.

The present invention discloses a method and electronic device for tracing the source of particulate phosphorus in water bodies. The method comprises: obtaining data on particulate matter from multiple sources within a study area; performing composite fingerprint factor analysis on inorganic particulate matter to obtain the inorganic particulate phosphorus contribution rates from multiple sources; performing isotope analysis on organic particulate matter to obtain the organic particulate phosphorus contribution rates from multiple sources; determining the adsorption-desorption equilibrium rates of particulate matter from multiple sources on phosphorus; and calculating the relative contribution rate of particulate phosphorus from each source based on the inorganic particulate phosphorus contribution rates from multiple sources, the organic particulate phosphorus contribution rates from multiple sources, and the adsorption-desorption equilibrium rates of particulate matter from multiple sources on phosphorus. By combining the multi-parameter advantages of composite fingerprint factors and the specificity of isotope technology, the present invention improves the accuracy and feasibility of tracing the source of particulate phosphorus in water bodies, provides more accurate tracing information, and achieves high-precision identification of the sources of particulate phosphorus in inorganic and organic particulate matter.

The present invention addresses the problem of providing: a porous material which has high performance of adsorbing / desorbing impurities, especially methane and carbon dioxide, and enables highly efficient hydrogen purification when used as an adsorbent in the PSA method; a method for producing the porous material; and a hydrogen purification apparatus. A porous material for hydrogen purification use according to the present invention has an acetone adsorption capacity of 12.5 mass fraction % or more. In the porous material, the pore volume of pores each having a diameter of 0.6 nm to 1.5 nm inclusive per unit volume is 0.140 mL / mL or more.

The invention belongs to the technical field of synthesis gas treatment, and provides a process for continuously regulating and controlling the ratio of H2 to CO in synthesis gas. The process comprises the following steps: introducing mixed gas into a first adsorption tower, selectively adsorbing H2, CO2 and CO by a first adsorbent, and discharging H2, CO2 and CO as tail gas out of the first adsorption tower; introducing the tail gas discharged from the first adsorption tower into a second adsorption tower, selectively adsorbing CO by a second adsorbent, and carrying out subsequent treatment on residual CO2 as tail gas; carrying out desorption treatment on the first adsorption tower to obtain H2; carrying out desorption treatment on the second adsorption tower to obtain CO; after the desorption is completed, the first adsorption tower and the second adsorption tower are respectively recovered to corresponding adsorption conditions, and the next round of adsorption-desorption circulation is carried out. According to the process, efficient separation of H2 and CO can be achieved, the H2 / CO ratio can be continuously and stably regulated and controlled, and the performance of the adsorbent is excellent.

The application discloses a method for separating and purifying phenolic substances by embedding ultrasonic coupling celery cell wall fixed bed adsorption and desorption. The method combines ultrasonic technology with fixed bed equipment and applies to the adsorption and desorption process of fruit and vegetable polyphenols on celery cell wall materials. Under the combined action of ultrasonic cavitation effect and mechanical effect, the texture of the celery cell wall material is changed in the adsorption / desorption process, and then the adsorption / desorption mass transfer parameters are changed, so that the adsorption and desorption of the celery cell wall on the polyphenols are strengthened, the breakthrough adsorption and desorption amounts are significantly improved, the desorption time is shortened, the purity of the polyphenols is improved, the breakthrough adsorption amount is increased by 15-23%, the desorption amount is increased by 17-26%, the desorption time is saved by 20-30%, and the purity of the polyphenols is increased by about 65%.

The invention discloses a salt-containing organic wastewater treatment device, system and method. The salt-containing organic wastewater treatment device comprises: a shell; the separation pipe is arranged in the shell, and the two ends of the separation pipe penetrate through the shell; the organic matter treatment unit comprises an organic matter adsorption layer and an organic matter desorption assembly; the inorganic salt treatment unit comprises an electrode assembly, a pulse power supply and an inorganic salt discharge pump, and the two units are communicated through a separation pipe separation channel. According to the invention, the principle that pulse electro-adsorption-desorption salt ions are instantaneously enriched in a corresponding electric field is utilized, and organic matters dissolved in water are enriched by virtue of the adsorption-ultrasonic desorption effect of the modified fabric at the same time; instantaneous high-concentration salt ions in the field region are transferred out in time when the electric field is reversed, so that the concentration difference is enlarged, thereby realizing step-by-step concentration of salt components (or organic components) in high-salt-concentration materials containing organic matters, finally realizing low-energy-consumption and high-flux separation of salt and high-boiling-point organic components in high-concentration organic wastewater, and improving the product value.

The invention provides an underground space human settlement environment carbon dioxide adsorption and utilization system and method.The underground space human settlement environment carbon dioxide adsorption and utilization system comprises a fan subsystem, an adsorption / desorption subsystem and a cyclic utilization subsystem; the fan subsystem comprises an air inlet unit for feeding air in the underground space into the adsorption / desorption subsystem; the adsorption / desorption subsystem comprises two groups of adsorption components connected with the fan subsystem, and the two groups of adsorption components alternately operate, so that when one group of adsorption components executes an adsorption process to remove water vapor and carbon dioxide in air, the other group of adsorption components synchronously executes a desorption process to regenerate an adsorbent; according to the system, the air inlet unit in the fan subsystem feeds air in the underground space into the adsorption / desorption subsystem, and the adsorption assembly in the adsorption / desorption subsystem is used for removing water vapor and carbon dioxide in the air, so that the purpose of reducing the carbon dioxide concentration and the air humidity of the human settlement environment in the underground space is achieved.

The invention discloses a coal seam gas extraction real-time monitoring and early warning method and system, and relates to the technical field of gas early warning, the working condition of a monitoring data set Dat is normalized to generate a normalized gas amount Nor, the direct interference of the extraction negative pressure and the extraction flow change on the monitoring value is effectively eliminated, and a balance reference set Ref is constructed on the basis; and the subsequent analysis is always established on the objective reference of the stable adsorption and desorption state of the coal body. Further, balance prediction is conducted on the real-time normalized gas amount Nor through an adsorption and desorption balance function Eqf, balance deviation Dev is obtained through calculation, and when the gas concentration Gas is still in a safe interval, the deviation degree between the actual coal diffusion behavior and the stable adsorption and desorption balance state can be recognized; and when the deviation shows a non-regressive characteristic in the time dimension, generating irreversible deviation Irv to accurately reflect the procedural characteristic that the coal body adsorption and desorption balance is substantially damaged.

The application discloses a gas recognition visual-olfactory fusion optoelectronic synapse device and a preparation method thereof, and belongs to the technical field of semiconductor devices. The optoelectronic synapse device comprises a substrate, a two-dimensional material floating gate heterojunction and source and drain electrodes. The heterojunction at least comprises a channel layer and a floating gate layer stacked thereon, and forms a Type-II energy band structure, and the interface has a defect state for carrier capture and release. The channel layer generates photo-generated carriers in response to light pulses, and the floating gate layer responds to gas stimulation and changes the charge state through gas adsorption / desorption; by applying a programmable light pulse stimulus to the channel layer, the adsorption or desorption process of gas molecules on the floating gate layer and the charge state thereof are dynamically modulated, a dynamic electrical response signal fusing visual and olfactory information is output, and gas recognition is realized. The application significantly improves the gas recognition accuracy from 52.24% of a single mode to 98.27% by using a dual-mode fusion feature, and realizes the synergy of miniaturization, low power consumption and high-precision perception.