166 results about "Desorption" patented technology

The invention relates to the field of coal seam anti-reflection, and particularly discloses a coal seam carbon dioxide and static expanding agent synergistic anti-reflection system and method. Slurry prepared by mixing a static expanding agent and water is injected into the expansion fracturing drill hole, in the process that the static expanding agent is subjected to hydration reaction and generates expansion stress, carbon dioxide gas is injected into the expansion fracturing drill hole through the carbon dioxide gas injection pipe, carbon dioxide and the hydration product of the static expanding agent are subjected to carbonization reaction to generate larger expansion stress, and the expansion fracturing drill hole is formed. Expanding the coal body fractures to form expansion fractures; the carbon dioxide is driven by differential pressure to seep into a coal matrix along expansion fractures, and adsorbed gas is driven to be desorbed into a free state through a competitive adsorption effect; and under the combined action of extraction negative pressure and carbon dioxide displacement, the free-state gas moves from the fracture channel to the extraction drill hole, and extraction is conducted through the gas extraction system. Carbon dioxide and the static expanding agent cooperate to improve permeability of the coal body, the displacement effect of carbon dioxide on gas is promoted, and the gas extraction effect is improved.

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

The invention discloses a method for recovering precious metal from refining wastewater, and relates to the technical field of wastewater resourceful treatment. Comprising the following steps: adding a porous carbon-based composite material into the acidic silver-containing refining wastewater, and stirring for adsorption to obtain an adsorption solution; the porous carbon-based composite material adsorbing the silver ions is recycled in a filtering or centrifugal separation mode; the porous carbon-based composite material adsorbing the silver ions makes contact with a desorption agent, desorption treatment is conducted, and a regenerated porous carbon-based composite material and a silver-containing desorption solution are obtained through separation; and a reducing agent is added into the silver-containing desorption solution, and silver ions are reduced into elemental silver to be recycled. The precious metal silver in the refining wastewater is recovered by adopting an adsorption method, and the recovery rate of the silver is relatively high.

The invention provides a thermal response hydrogel construction method based on solid-liquid interface repulsive force and water content, which comprises the following steps: establishing a coarse graining model of a thermal response polymer network and a water molecule system, and constructing a three-dimensional polymer gel network by adjusting the number of polymer chain monomers and the proportion of a cross-linking agent; constructing a simulation box according to the network geometric dimension and filling the simulation box with water beads; defining interaction parameters among beads under the dissipative particle dynamics model, performing molecular dynamics simulation, counting the mass center of a polymer skeleton and the number of water beads adjacent to an interface, and calculating the equilibrium moisture content; establishing a solid-liquid interface model, and calculating an equilibrium distance and interaction energy between a water bead plane and a polymer skeleton plane at the adsorption temperature; the network polymerization degree is optimized by adjusting the number of polymer chain monomers, and the optimal design of the thermal response desorption performance is achieved. The method provided by the invention is suitable for macroscopic hydrogel structure evaluation, can quickly obtain equilibrium moisture content and interfacial interaction energy, and guides reasonable proportioning and preparation of the hydrogel.

The invention discloses an active treatment method for multi-source residual coal gas of a waste mine, which comprises the following steps: firstly, hydraulic fracturing pressure relief permeability improvement and overlying strata separation layer grouting reinforcement are cooperated, the hydraulic fracturing pressure relief permeability improvement establishes a netted fracture network in a coal body to realize permeability improvement, and the overlying strata separation layer grouting reinforcement compacts goaf gangue through grouting and reinforces an overlying strata to form a continuous bearing consolidation body; and therefore, a pressure relief and permeability increasing-strengthening and reinforcing integrated structure is formed, a stable structure and a penetrating seepage network are provided for subsequent displacement and gas extraction, and the subsequent gas extraction efficiency is guaranteed. Then low-temperature liquid CO2 is injected into the coal seam through the injection well, gas displacement and desorption are conducted on gas adsorbed in the coal seam under the action of phase change and competitive adsorption, expansion and development are conducted on fractures to enable permeability to be secondarily enhanced, and meanwhile part of CO2 obtained after displacement is retained and sealed in a coal body and a goaf; on the premise that the gas extraction concentration and efficiency are effectively improved, CO2 can be stored, and the dual effects of resource utilization and carbon storage are achieved.

A new method for extracting lithium from salt lake brine, comprising the following steps: a salt lake old brine raw material, desorption liquid, low-magnesium water, and adsorption tail liquid pass through an old brine feeding pipe (2), a desorption liquid feeding pipe (4), a low-magnesium water top desorption liquid feeding pipe (3), and an adsorption tail liquid top desorption liquid feeding pipe (11), respectively, which are located above and below a rotary disc of a multi-way valve system (1); and after respectively entering corresponding adsorption columns (6) by means of a duct and channel within the multi-way valve system (1), the entire process procedure is completed from an adsorption tail liquid discharge pipe (7), a qualified desorption liquid discharge pipe (10), a lithium-containing old brine discharge pipe (8), and an adsorption tail liquid top desorption liquid discharge pipe (5); and the adsorption columns (6) are connected in series or in parallel by means of channels located in the multi-way valve system (1). The feature in which a multi-way valve device is simple and easy to operate is utilized, and in comparison with a fixed bed operating system, the utilization rate of lithium adsorbent may be increased by over 20%, the utilization efficiency of the lithium adsorbent may be increased by over 40%, and production costs may be reduced by 30-50%. Therefore, the stability of a qualified desorption liquid is improved, stable production is guaranteed, and year-round constant operation may be achieved.

The invention discloses a cyclic regeneration treatment method of stainless steel pickling waste liquid, which realizes full-flow recycling of the pickling waste liquid by constructing a closed-loop system of pretreatment, adsorption, desorption, recovery, regeneration and circulation. A molecularly imprinted polymer adsorption technology is adopted, targeted capture of Cr < 3 + >, Ni < 2 + > and Fe < 2 + > / 3 < + > is achieved through specific recognition sites, and the bottleneck that a traditional adsorbent is poor in selectivity is broken through; the supercritical CO fluid extraction technology utilizes the characteristics of high diffusivity and low surface tension, efficient desorption of metal ions is achieved under mild conditions, and secondary pollution caused by a traditional organic solvent is avoided. A technical closed loop is formed among the steps through parameter synergy and substance circulation, and finally the dual purposes of full-amount regeneration of the pickling waste liquid and efficient recovery of metal resources are achieved.

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

The invention relates to the technical field of environmental and biological analysis and detection, in particular to a method for extracting perfluorinated / polyfluorinated compounds based on confinement fluid. The method comprises the following steps: providing a multi-dimensional reticular nanopore material; growing mutually staggered carbon nanofibers on the surface of a substrate through a chemical vapor deposition method; loading a confinement fluid in a pore channel of the multi-dimensional reticular nano-pore channel material; contacting the material with a to-be-detected sample, and extracting; desorbing the extracted material by using a desorption solvent to obtain a desorption solution; and detecting the perfluorinated / polyfluorinated compounds in the desorption solution. A multi-dimensional net-shaped nano pore channel formed by mutual staggering of the carbon nanofibers provides a stable multi-dimensional micro-nano confinement space for confinement fluid. According to the structure, mass transfer and distribution of a target analyte from a complex matrix to a confinement fluid are greatly promoted, so that efficient enrichment of various perfluoro / polyfluoro compounds is realized, and the recovery rate and the detection sensitivity of the method are improved.

The invention relates to a method for treating waste gas containing sulfur and low-concentration VOCs (volatile organic compounds), which comprises the following steps: (1) the waste gas containing sulfur and low-concentration VOCs enters an adsorption rotating wheel through an induced draft fan, and is subjected to desorption treatment after adsorption to generate desorbed and desorbed gas; and (2) the desorbed desorbed gas is subjected to heat recovery and then enters a concentration homogenization unit to be treated, the homogenized gas is mixed with air, the mixture is filtered and subjected to temperature control and then enters a catalytic oxidation unit, the catalytic oxidation unit is filled with a sulfur-resistant catalytic oxidation catalyst, and the high-temperature purified gas discharged by the reaction is subjected to heat recovery and temperature regulation and is reused as the high-temperature desorbed gas. According to the invention, high-efficiency stable treatment of waste gas containing sulfur and low-concentration VOCs can be realized, the stability and safety of the adsorption rotating wheel during switching are ensured, sulfur poisoning of a catalyst can be avoided, and long-term safe and stable operation of the device is ensured.

The invention relates to the field of impurity separation, and discloses a method for separating impurities in a liquid phase and application, the method comprises the following steps: (1) contacting a liquid-phase raw material with an adsorbent for adsorption to obtain a liquid-phase material flow; the liquid-phase raw material comprises an organic liquid hydrogen storage substance and impurities; the adsorbent preferentially adsorbs impurities in the liquid-phase raw material; (2) carrying out back-flushing desorption on the adsorbent by using part of the liquid-phase material flow to obtain a desorption solution; based on the total mass of the desorption solution, the impurity content in the desorption solution is 2-5%; (3) feeding the desorption liquid into a rectifying tower, carrying out rectification separation, and outputting the obtained tower bottom distillate and the residual part of liquid phase material flow as products; and (4) regenerating the adsorbent after backwashing desorption. The method has the characteristics of high purity of the organic liquid hydrogen storage substance, low cost and no introduction of new impurities.

The application relates to a plasma adsorption dual-action industrial wastewater degradation equipment and a method thereof, and belongs to the technical field of environmental protection. Adsorption and desorption can be synchronously carried out, production efficiency is improved, power consumption and electrode loss are greatly reduced, and treatment of high-concentration and large-flow sewage is realized. The treatment depth of the application is excellent, the oxidation potential of plasma discharge can easily reach more than 20 electron volts, the oxidation potential of fluorine, which is the highest in chemical substances, is only 3.2 electron volts, and the higher oxidation potential means better treatment effect. Normal temperature and pressure operation, low operation cost. The application is suitable for most water quality (no requirements for the PH value, salinity and ammonia nitrogen of water), and the technology has excellent universality. Traditional adsorption technology inevitably produces a large amount of solid waste, and the treatment difficulty and treatment cost are high, which has become a pain point in the industry. The application avoids the generation of solid waste while improving the degradation efficiency of organic matters and reducing energy consumption.

The utility model discloses an absorption and desorption device with a safety instrument system, and particularly relates to the technical field of chemical engineering principle experiment teaching, which comprises a support frame, a water tank fixedly arranged at the top of the support frame, a water inlet pipe arranged at the top of the water tank in a penetrating manner, and an absorption pump fixedly arranged on one side of the water tank, an absorption mechanism is fixedly arranged on one side of the absorption pump and comprises a first conveying pipe fixedly arranged at the output end of the absorption pump, an absorption tower is arranged at one end of the first conveying pipe in a penetrating mode, a connecting pipe is arranged at the bottom end of the absorption tower in a penetrating mode, and a buffer tank is arranged at one end of the connecting pipe in a penetrating mode; and two liquid level sensors are arranged in the buffer tank in a penetrating manner. The absorption and desorption device effectively avoids the influence of flow velocity mismatching of absorption liquid and desorption liquid on the experiment process, further maintains stable experiment conditions and protects normal operation of equipment, and meanwhile, the whole absorption and desorption device is provided with a safety instrument system, so that the safety of the device is improved.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.

The present application provides a kind of shale gas dessert evaluation method based on methane carbon isotope in tank top gas, the shale gas dessert evaluation method includes the following steps: (1) obtain the tank top gas sample of logging, measure the methane carbon isotope value in tank top gas sample by time period;(2) the data sequence of different time periods of methane carbon isotope value obtained in step (1) is curve fitting;(3) the curve obtained in step (2) is sequentially integrated and differentiated, form the model algorithm of the characteristics of shale reservoir storage and desorption gas volume;(4) according to the model algorithm obtained in step (3), the quality of shale gas reservoir is classified, and the dessert interval is divided out.The evaluation method provided by the present application solves the technical problem of shale gas reservoir site dessert identification under the condition of no geological coring and no geophysical logging, improves the shale gas dessert drilling rate and single well development efficiency, and clarifies the related technical principles and technical routes, reduces the exploration cost, and improves the customer acceptance.

The invention discloses a desorption and separation device and a desorption and separation method for substances in a material, and belongs to the technical field of impurity desorption, and the desorption and separation method comprises the following steps: obtaining absorption wavelengths, half-peak widths and relative intensities of all binding bonds between a target material and a specific substance, and obtaining binding bond energy between the target material and the specific substance; an irradiation generating device is adopted to irradiate a target material, energy emitted by the irradiation generating device is radiation or radiation combination equal to binding bond energy between the target material and a specific substance, and the specific substance and the target material are removed. According to the method for desorbing and separating the substances in the material, the energy of the binding bond between the target material and the specific substance is obtained, the radiation energy is accurately provided by utilizing the radiation generation device, the accurate cutting of the binding bond between the target material and the specific substance is realized, and on the premise that the phase change of the material is not influenced and the performance of the material is not damaged, the separation efficiency is improved. And efficient desorption of a target material and a specific substance is realized.

The invention relates to the technical field of water treatment intelligent control, and discloses a biochar adsorption capacity dynamics simulation and prediction system, which comprises a data acquisition module, an Arrhenius equation is utilized to introduce a temperature correction coefficient to carry out thermodynamic compensation on an adsorption dynamics constant; the flow state recognition module judges a forward adsorption or reverse desorption working condition based on a Langmuir model; the resistance decoupling module is used for calculating a mass transfer Biot number based on a double-membrane theory so as to distinguish diffusion resistance in a liquid membrane and particles, and distinguishing physical blockage and chemical saturation by utilizing a physical blockage index; the lag compensation module introduces a lag correction factor to correct the desorption equilibrium concentration, and calculates the recovery adsorption capacity during the reverse desorption period; and the life prediction module corrects the theoretical residual capacity by using the dynamic utilization rate coefficient and generates an operation and maintenance instruction. According to the invention, through resistance decoupling and lag compensation mechanisms, physical and chemical attenuation mechanisms are effectively distinguished, and accurate prediction of the adsorption penetration time under the dynamic working condition is realized.

An adsorptive separation method is disclosed. The adsorptive separation method of the present invention is a method for adsorptively separating a first gas from a mixed gas using a plurality of adsorption beds provided with an adsorbent selectively adsorbing the first gas, characterized by comprising an adsorption step, a depressurization step, a first rinse step, a second rinse step, a depressurization desorption step, a purge step, a pressurization step, a pressure increasing equalization and step, a repressurization step. According to the present invention, in the second rinse step, a high-purity first gas is introduced into the adsorption bed at a first pressure, and in the depressurization desorption step, the first gas is compressed to the first pressure by a compressor in a process of being transferred to a high-pressure product vessel, thereby making it possible to provide an adsorptive separation method configured to reduce power consumption by pressurizing a product gas of atmospheric pressure or higher discharged in a blowdown step to a pressure at which a rinse is performed, and to reduce power consumption used to create a recirculation stream used for the rinse.

The invention relates to a mineral flotation method based on different-charge multi-scale bubble cooperative regulation and control, belongs to the technical field of mineral processing, and solves the problems of low mineralization efficiency and high desorption probability in a coarse particle fluidized bed flotation process in the prior art. The method comprises the following steps: step 1, system preparation; 2, starting the equipment; 3, separation is conducted, and initial collection of concentrate and tailings is completed; 4, dynamic adjustment is carried out; step 4.1, double inclination angles are cooperatively adjusted, so that the horizontal inclination angle of the strip-shaped millimeter-scale bubble production arm is kept consistent with the horizontal inclination angle of the top of the micron-scale bubble production box; and step 4.2, dynamically adjusting the ultraviolet light intensity. According to the method, the ash content data of concentrate and tailings are collected in real time through the online ash content meter, the intensity of the ultraviolet light source is dynamically adjusted, accurate regulation and control over the surface charge characteristics of the intelligent microbubbles are achieved, a'monitoring-decision-execution-feedback 'closed-loop control loop is formed, it is ensured that the flotation process is stable and reliable, and the separation efficiency of coarse-grained minerals is improved.

The utility model discloses a kind of PSA-3 desorption gas's recycling device, including base, the top of base is provided with executive component;Executive component includes processing box, the top of processing box is fixedly connected with top cover, the top of the substrate is fixedly connected with longitudinal partition and cross partition, the top of the base is fixedly installed with buffer tank, the interface of gas pump is fixedly connected with first conduit, one end of the first conduit penetrates top cover and substrate, the utility model relates to gas recovery technical field;The PSA-3 desorption gas's recycling device, a large amount of desorption gas in production is stored in buffer tank first, and it can be introduced into the washing liquid of processing box by first conduit by starting gas pump. Impurity particles are intercepted in processing box due to contact with liquid and become heavy;Start servo motor to drive rotating rod and stirring vane rotation, make washing liquid rotate, mince big air bubble to generate more small air bubble, to this increase the contact area with washing liquid, enhance the interception rate to tiny impurity particles.

The application discloses a copper-zinc bimetallic organic metal framework compound and a synthesis method and application thereof, and is based on a hydrothermal solvent method and a strong alkali compound surface layer activation process to prepare a novel porous composite material, and the specific steps comprise zinc-based "core" layer MOF material synthesis, surface strengthening activation of the core layer material by using a strong alkali, copper-based loading, in-situ growth of a "shell" layer MOF, and application of the material to CO2 adsorption and capture; the optimal sample has a CO2 adsorption capacity of up to 151.8 cm 3 / g under normal temperature and pressure, a CO2 gas adsorption capacity of up to 271.2 cm 3 / g in a high pressure section, a separation coefficient of the material for 400 ppm CO2 / N2 is up to 26.34, a separation coefficient of the material for 40 / 60 v / v CO2 / H2 is up to 141.07, and after an adsorption-desorption cycle test, the adsorption capacity performance is still retained to be not less than 95%, compared with a traditional single-metal MOF material, the method can significantly improve the adsorption separation performance and stability of the material.

This invention relates to the field of carbon dioxide capture technology, and particularly to an apparatus and method for directly capturing carbon dioxide from the air and recovering the capture liquid. The invention utilizes a thin-layer moving bed to spray droplets of a lean capture liquid and achieve carbon dioxide capture through air convection. When the carbonate concentration in the capture liquid reaches a certain value, it is defined as a rich capture liquid. The lean capture liquid is recovered using an electrolytic process. A specific structure and connection relationship achieve good interaction, enabling efficient, rapid, low-energy, and controllable absorption of carbon dioxide from the air under low partial pressure (440–460 ppm). This achieves high-efficiency, large-scale carbon dioxide capture and allows for continuous production of high-purity hydrogen and carbon dioxide products. The capture liquid is reused, realizing an integrated capture and desorption system design. Using 0.5 MkOH as the lean capture liquid, a 600m³… 3 Under the condition of / h induced draft, it is converted into a rich liquid after 13h, and the average CO2 concentration at the outlet is 380ppm, which is 80ppm lower than the CO2 concentration in the inlet air.

The invention discloses a method for high-precision removal and recovery of fluoride from fluorine-containing tail gas, and relates to the fields of pressure swing adsorption separation, fluorine chemical industry, environmental protection and atmosphere control. Comprising the following steps: 1) carrying out deacidification treatment on tail gas discharged by a fluoride production device; (2) the deacidified tail gas enters a pressure swing adsorption system to be purified, and purified gas is directly emptied; and after vacuumizing regeneration, the desorbed gas rich in fluoride can be returned to a production workshop for reuse or is intensively incinerated. According to the purification method provided by the invention, on one hand, the industrial fluorine-containing tail gas can be effectively purified, so that the treated components can be directly discharged into the atmosphere, up-to-standard discharge is realized, and excellent environmental compatibility and environmental protection benefits are shown; and on the other hand, for the production process, the utilization rate of the raw materials is remarkably increased, the treatment pressure of the back-end process is relieved, and therefore the dual optimization objectives of increasing the product yield and reducing the comprehensive energy consumption are cooperatively achieved.

The application discloses a method for measuring internal diffusion coefficient and surface interfacial permeability of porous materials, which comprises the following steps: measuring the change of desorption amount of the porous materials under the condition of being swept by a carrier gas after adsorption equilibrium by using a zero-length column method; determining the initial time of desorption of the porous materials according to the change data of adsorbate concentration signal of the empty tube experiment under the same test condition; processing the obtained change data of desorption amount, integrating the desorption concentration with respect to time, so as to obtain the change data of the desorption mass fraction; determining the limiting mechanism of the mass transfer process of the porous materials, establishing a mass conservation equation for describing the test system of the porous materials, and obtaining a control equation for describing the change process of the desorption amount through mathematical derivation; and directly and simultaneously obtaining the internal diffusion coefficient and the surface interfacial permeability of the porous materials through calculation and fitting of the control equation obtained through derivation and the change data of the desorption amount of the porous materials measured through experiments.

This invention relates to the field of gas separation technology and discloses a pressure swing adsorption (PSA) purification process for low-concentration CO2 resistant to impurity interference, comprising the following steps: S1: Adsorption step: The raw gas containing impurities and CO2 is passed into a main adsorption tower containing a composite adsorbent under adsorption pressure, so that CO2 is selectively adsorbed to obtain purified tail gas; S2: Regeneration step: The main adsorption tower is regenerated, including: S2.1: Pressure equalization and depressurization: The gas in the main adsorption tower is released to recover pressure energy; S2.2: Vacuuming: Vacuum desorption is performed on the main adsorption tower to obtain CO2 product gas; This invention uses a composite adsorbent with a gradient structure, whose hydrophobic outer shell effectively blocks moisture erosion, and the inner layer preferentially chemically fixes SO2. x NO x It removes acidic impurities, thereby protecting the core amine sites from highly selective CO2 adsorption and significantly improving its resistance to poisoning and long-term stability under complex flue gas conditions.

This invention relates to the field of wastewater treatment technology. It discloses a wastewater treatment system for acetoaniline, comprising a shell, a liquid supply mechanism, and a recovery mechanism. The temperature control partition plate near the rectangular adsorption treatment unit is provided with a heating zone, a cooling zone, and a traction rail. The cooling zones are staggered along the X-axis. The rectangular adsorption treatment unit is driven to slide back and forth along the X-axis by the traction rail, and several rectangular adsorption treatment units distributed along the Y-axis slide back and forth alternately. This shortens the temperature change time between the initial and high-efficiency periods, thereby increasing the high-efficiency time interval and controlling the movement reaction rapidly. It is suitable for applications with high concentrations and high toxicity of organic matter, ensuring that the entire adsorption treatment system remains in a state of high-efficiency adsorption and desorption, improving adsorption effect and efficiency within the same time period and adsorption volume.

The invention belongs to the technical field of soil analysis, and particularly relates to a device for analyzing adsorption and desorption characteristics of soil solid-liquid interface pollutants, which comprises a sample reaction module, an environmental condition control module, a solution supply and acquisition module, a detection analysis module, a data acquisition and control system and an auxiliary module, through detachable concentric column units and sub-column systems, dual heterogeneous simulation in the horizontal and vertical directions is realized, the similarity with real soil is greatly improved, wormholes and root system special channels are simulated, a pollutant migration path is closer to a natural state, the problem that a traditional device is high in adsorption capacity is solved, and the device is suitable for large-scale popularization and application. And the interlayer solute diffusion and mechanical mixing process is accurately simulated by adjusting the pore diameter and flow of the porous partition plate.

A system includes a gas capture system configured to capture an undesirable gas from a gas flow. The gas capture system includes a plurality of contactors each having a sorbent material, wherein each of the plurality of contactors is configured to operate in a plurality of stages. The plurality of stages includes at least an adsorption stage configured to adsorb the undesirable gas from the gas flow into the sorbent material and a desorption stage configured to desorb the undesirable gas from the sorbent material. The gas capture system further includes a fluid transfer system configured to transfer a working fluid to and / or from at least one contactor of the plurality of contactors to transition the at least one contactor between different stages of the plurality of stages.

The application relates to the technical field of intelligent water treatment control, and discloses a system for simulating and predicting the kinetics of the adsorption capacity of biochar, which comprises the following modules: a data acquisition module uses the Arrhenius equation to introduce a temperature correction coefficient to perform thermodynamic compensation on adsorption kinetic constants; a flow state recognition module determines a forward adsorption or reverse desorption working condition based on the Langmuir model; a resistance decoupling module calculates the mass transfer Biot number based on the double membrane theory to distinguish the liquid film and the internal diffusion resistance of the particles, and uses a physical blockage index to distinguish physical blockage and chemical saturation; a hysteresis compensation module introduces a hysteresis correction factor to correct the desorption equilibrium concentration and calculate the recovery adsorption capacity during the reverse desorption; and a service life prediction module uses a dynamic utilization rate coefficient to correct the theoretical residual capacity and generate operation and maintenance instructions. Through the resistance decoupling and hysteresis compensation mechanisms, the physical and chemical attenuation mechanisms are effectively distinguished, and the precise prediction of the adsorption breakthrough time under dynamic working conditions is realized.

The invention discloses a method for measuring the gas content in a die casting, and belongs to the technical field of material detection. The method comprises the following steps: loading a sample into the closed desorption cavity; vacuumizing and pre-degassing the cavity by using an oil-free high-vacuum acquisition module formed by connecting a molecular pump and a dry-type screw pump in series; stepwise heating is carried out on the sample through program temperature control; the released gas is guided into a differential pressure sensing metering unit through a low-thermal-conductivity aluminum oxide ceramic isolation tube; the unit comprises a reference cavity and a measuring cavity which are arranged in the same constant temperature device, and the gas inflow rate is dynamically represented by measuring the pressure difference between the two cavities; and based on the ideal gas state equation and a calculation model containing cavity thermal expansion compensation, calculating the amount of the gas substance in unit time in real time. The problems of poor precision and repeatability caused by oil pollution, thermal interference and discontinuous metering are solved, and continuous, dynamic and high-repeatability automatic measurement of the gas content in the die casting is realized.