122 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 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.

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 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 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 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.

The invention belongs to the technical field of water environment treatment and ecological restoration, and particularly discloses a BN model-based ecological restoration method for heavy metal pollution in river and lake water sediments. According to the method, the synergistic effects of key environmental factors such as CEC, OM, SFL, DO, TN and TP are creatively integrated, a BN model capable of accurately simulating the adsorption-desorption process of heavy metal on the water-sediment interface is constructed, the model is used for reasoning and analyzing the heavy metal migration and transformation rule, the repair strategy is optimized, and the effect is verified. According to the method, the remediation efficiency is remarkably improved, the risk of secondary pollution is reduced, and scientific and technical support is provided for heavy metal treatment in complex river and lake environments.

The invention relates to the technical field of gas adsorption separation, in particular to a natural gas purification treatment method and system based on adsorption and desorption, and the method comprises the following steps: based on natural gas purification requirements, extracting an adsorbent model and constraint conditions, analyzing adsorption efficiency and impurity removal capability, identifying weak areas, optimizing adsorption behavior data, and adjusting adsorption and desorption processes. According to the method, the candidate adsorbents are screened and optimized, so that the adsorption and desorption characteristics in the natural gas purification process are accurately predicted, regulated and controlled, the impurity removal capacity and the purification efficiency are improved, the stability and reliability of the design scheme are verified, the fluctuation working condition is screened, and the purification performance optimization trend analysis conclusion is obtained. The adsorbent layout and operation parameters are optimized, the long-term stability and reliability are enhanced, the adaptability and performance under different working conditions are improved, the lasting and consistent purification effect is ensured, the performance reduction caused by working condition fluctuation is avoided, and the stability and sustainability of long-term operation are ensured.

The invention relates to the technical field of VOCs gas recovery, and discloses a crude oil loading precooling two-stage deep adsorption and desorption VOCs gas recovery device and method, and the device comprises a closed collection and pretreatment unit, a condensation unit, and an adsorption and desorption unit; the closed collection and pretreatment unit is used for containing VOCs gas; the condensation unit comprises a pre-cooling heat exchanger, the pre-cooling heat exchanger is provided with a hot inlet end, a hot outlet end, a cold inlet end, a cold outlet end and a condensate outlet communicated with the hot cavity, and the hot inlet end of the pre-cooling heat exchanger is communicated with the closed collection and pretreatment unit. The hot outlet end of the desorbed gas cryogenic heat exchanger is communicated with the hot inlet end of the precooling heat exchanger, so that non-condensable gas subjected to desorption and cryogenic treatment can flow back to the inlet of the system to be circularly treated, the problem that light components in crude oil loading tail gas are accumulated in the system is effectively solved, and full-amount deep purification of VOCs gas is realized.

This invention belongs to the field of numerical simulation technology for oil and gas reservoir development, specifically relating to a numerical simulation method for enhanced oil recovery (EOR) through carbon dioxide injection into coalbed methane. The method includes: establishing a three-dimensional geological model, a three-dimensional geomechanical model, and a fracture network model using Petrel; establishing a numerical simulation model of coalbed methane components including fractures using the Intersect simulator, and performing historical data fitting based on historical production data; importing the geological attribute field, pressure field, and saturation field at the end of the historical data fitting into the CMG-GEM simulator to conduct thermal simulation of carbon dioxide injection into coalbed methane; importing the simulated pressure and temperature fields back into Petrel, and then using the Intersect simulator to complete the dynamic prediction of thermal drive production. This invention can consider the influence of temperature on CH4 and CO2 adsorption / desorption, improving model accuracy and significantly enhancing the accuracy of production prediction.

The application discloses a beta-CD modified polyvinyl alcohol-sodium alginate aerogel, a preparation method and application thereof, the specific surface area of the aerogel is 2.29 m 2 / g, and the average pore size is 13.4 nm; when the aerogel is enlarged to 300 mu m, the aerogel shows an uneven porous reticular structure, the thickness of the reticular structure wall is fine and adjacent holes are blocked. The oxygen content of the aerogel is close to 70%, the aerogel has good selectivity to rare earth elements europium (Eu), gadolinium (Gd) and dysprosium (Dy), and the maximum adsorption capacities are 222.22 mg / g, 217.39 mg / g and 204.08 mg / g respectively. The cyclic regeneration experiment shows that after 6 times of adsorption-desorption, the adsorption efficiency of the aerogel to Eu, Dy and Gd still remains at 96%, and the desorption efficiency remains at 94%. The aerogel is used for recovery of rare earth elements in simulated acid mine water, and in the case that the concentration of competitive ions is 3 orders of magnitude higher than that of rare earth ions, the adsorption rate of the aerogel to rare earth elements is more than 99%.

A gas detection method includes: (a) alternating, in a first cycle, between heating and non-heating of a gas sensor exposed to a sample gas that includes a detection-target gas and a non-detection-target gas other than the detection-target gas; (b) obtaining the gas adsorption-desorption signal output from the gas sensor, the gas adsorption-desorption signal being a signal in which a detection-target gas adsorption-desorption signal corresponding to the detection-target gas and a non-detection-target gas adsorption-desorption signal corresponding to the non-detection-target gas are superposed on each other; and (c) multiplying, with use of a multiplier, the gas adsorption-desorption signal obtained in (b) and a reference signal that repeats a rise and a fall in a regular cycle.

The invention discloses a zero-heat-rejection carbon dioxide closed power generation system and method based on multistage adsorption and desorption, and relates to the technical field of thermal power generation and energy storage, and the zero-heat-rejection carbon dioxide closed power generation system comprises a first thermal driving circulation module, a second power circulation module, a multifunctional zeolite bed module and an intelligent control module, the intelligent control module and the multifunctional zeolite bed module are both connected with the second power circulation module and the first thermal driving circulation module, the first thermal driving circulation module conveys heat of an external heat source to the multifunctional zeolite bed module in a desorption mode, and the second power circulation module forms an acting and adsorption passage of a carbon dioxide working medium. According to the zero-heat-removal carbon dioxide closed power generation system and method based on multi-stage adsorption and desorption, gradient utilization of heat and deep excavation of cooling capacity are achieved through the series connection design of the multi-stage zeolite sub-beds, near-vacuum turbine backpressure is created under the conditions that an external cold source is not needed and only a medium-temperature heat source is used, and the power generation efficiency is improved. And all waste heat is recovered in the system.

This invention discloses a method for exploiting shallow adsorbed shale gas, comprising the following steps: S101, based on core and well logging data, determining the shale gas occurrence characteristics, reservoir type, and main exploitation targets; S102, based on isothermal adsorption-desorption experiments, determining the adsorption-desorption law of the adsorbed gas and the sensitive desorption pressure P. 敏感 Based on the production characteristics, S103 selected the adsorption pneumatic drainage process to achieve large-scale production of shallow adsorbed shale gas.

The application is suitable for the technical field of oil and gas field stimulation and reconstruction, and provides a gas reservoir water lock releasing method based on adsorption-desorption dynamic balance regulation and control. The method first injects a low-concentration water lock releasing agent solution into a reservoir to form a non-saturated adsorption layer; then, a high-concentration water lock releasing agent is injected in a slug mode, and the surfactant component is redistributed and rearranged on the interface driven by the concentration gradient; by controlling the residence time, the interface molecules are partially desorbed and re-adsorbed to establish adsorption-desorption dynamic balance; combined with injection parameter window regulation and control, the periodic reconstruction of the interface structure and the release of water lock are realized. Through the synergistic mechanism of "staged injection-concentration gradient-residence regulation", the surfactant component presents a dynamic conversion behavior, effectively weakens the stability of the water film and promotes the release of bound water. The application does not depend on the structure of a specific chemical agent, has wide application range and strong interface regulation and control capability, and is suitable for the release of water lock in low-porosity and low-permeability and tight gas reservoirs.

The invention discloses a programmed function switching-based calcium sulfate whisker length-diameter ratio accurate regulation and control method, and belongs to the technical field of inorganic functional crystal material preparation. The traditional static regulation and control limitation is broken through, and a new mechanism of programmed adsorption-desorption function switching is created for the first time. The preparation method comprises the following steps: constructing an initial growth inhibition template by using amino trimethylene phosphonic acid (ATMP) as a crystal face adsorbent; in different stages of crystal growth, desorption agents with complementary functions are introduced in stages: sodium citrate is introduced in a competitive growth period, and radial growth inhibition is partially relieved; polyvinyl alcohol (PVA) is introduced in the length-diameter ratio curing period, and material transmission at the axial growth end is specifically promoted. The function switching process is precisely coupled with a gradient temperature change process, and sequential dynamic reconstruction of a crystal growth interface is realized. According to the invention, the length-diameter ratio of the calcium sulfate whisker is regulated and controlled in an ultra-wide range of 50-500, the product uniformity is improved, and a raw material with better performance is provided for the fields of high-end composite materials and the like.