483 results about "Thermal desorption" patented technology

The invention provides a system and method for improving the ability of activated carbon to adsorb medium and low temperature VOCs waste gas, and the system comprises: a heat exchanger for introducing steam heat of the medium and low temperature VOCs waste gas to perform waste heat recovery to generate high temperature circulating water; the refrigerating system is used for receiving the high-temperature circulating water through a pipeline and recovering heat of the high-temperature circulating water to enable the refrigerating system to generate a refrigerant, and the refrigerant enters the heat exchanger to exchange heat with the medium-low-temperature VOCs waste gas; the activated carbon fixed bed adsorption device is used for receiving the medium and low temperature VOCs waste gas after heat exchange and adsorbing organic gas in the waste gas; the steam thermal desorption device is used for introducing steam into the activated carbon fixed bed adsorption device for desorption after the activated carbon fixed bed adsorption device is saturated in adsorption, and the steam takes away the organic gas adsorbed by the activated carbon fixed bed adsorption device and enters a downstream phase change heat exchanger; and the phase change heat exchanger is used for recycling steam heat after analysis by using circulating water to generate high-temperature circulating water, and after heat is recycled, waste gas is condensed, so that organic gas is dissolved in water to form an organic solvent to be recycled.

The present invention discloses a monatomic fluid driven carbon dioxide methanation conversion system and a method of use, comprising an absorption device and a desorption conversion device, wherein the liquid outlet of the absorption device is connected to the first inlet of a heat exchanger via a first pump, the first outlet of the heat exchanger is connected to the inlet of a desorption conversion device, the liquid outlet of the desorption conversion device is connected to the second inlet of the heat exchanger via a second pump, and the second outlet of the heat exchanger is connected to the liquid inlet of the absorption device via a cooler. The use of monatomic fluid as a solvent in the present invention can not only generate electric charge and effectively solve the problem of high energy consumption caused by desorption of CO2 due to thermal desorption, but also couple thermal and electric charge effects to greatly break through the high energy consumption bottleneck caused by reaction temperature faced by traditional thermal desorption, and greatly reduce the reaction energy barrier and reaction heat. During the desorption process, the charge effect of the molecules in the solvent combined with CO2 can promote the realization of efficient methanation conversion of CO2.

The invention provides a shale oil pyrolysis adsorption oil and free oil correction method based on a nuclear magnetic experiment, and belongs to the field of exploration and development of unconventional oil and gas fields. According to the method, on the basis of a shale rock physical experiment and a shale nuclear magnetic resonance experiment, the occurrence space and content of adsorbed oil are determined by using multi-state nuclear magnetic resonance experiments such as original sample, saturated oil, washing oil and different temperatures, so that a nuclear magnetic adsorbed oil model is constructed, and the content of the adsorbed oil is determined by further combining a different-temperature-order parallel crushed sample lithologic pyrolysis experiment-nuclear magnetic combined measurement experiment. The content of the free oil and the content of the adsorbed oil are calculated through the two-dimensional nuclear magnetism T1-T2 spectrum semaphore, the content of the free oil and the content of the adsorbed oil are compared and analyzed, the difference between the nuclear magnetism adsorbed oil and the pyrolysis adsorbed oil is matched with a free hydrocarbon curve to achieve adsorbed oil correction, and the free oil and the adsorbed oil are obtained.

The invention discloses an injection molding high-density alloy steel sintering integrated preparation process, which comprises the steps of alloy raw material proportioning, feed preparation, injection molding, continuous thermal desorption sintering treatment and enhanced heat treatment, and comprises the following steps: selecting gas atomization pure iron powder subjected to vacuum reduction treatment, and matching with chromium, nickel, molybdenum, vanadium, carbon, silicon, manganese and iron powder multi-component alloy proportioning; a phenolic resin-polyformaldehyde composite binder is adopted, 0.5-1.5% of a lubricating additive is added, internal mixing parameters are controlled under the protection of inert gas according to the powder-to-rubber ratio of 72-77%: 23-28%, and the problem that the compatibility of a single binder and alloy powder is poor is solved; three-section gradient temperature control injection molding and a continuous atmosphere furnace sectional degreasing-sintering integrated process are combined, and strengthening heat treatment is matched, so that sufficient diffusion of elements and densification of a green body are realized, and defects are avoided. The technology effectively solves the technical problems that traditional raw materials are high in impurity content and insufficient in element diffusion, and therefore the alloy steel sintering preparation efficiency can be improved.

The invention belongs to the technical field of expiration detection, and particularly relates to an intelligent expiration tail end gas sampling device and method. The device specifically comprises a shell, a circuit board, a carbon dioxide sensor, a pressure sensor, a baffle, a top cover, a suspension plate, an air pump, a relay, a breathing mask, a mask connector with an internal small cavity, a thermal desorption tube, a TD tube, a Bluetooth module, an air path channel, a silicone tube and the like. End-expiratory gas collection is achieved through accurate triggering and flow control, and dead space gas mixing is avoided; collected gas is directly enriched into a thermal desorption (TD) adsorption tube, so that the loss of VOCs in the transmission and storage process is reduced; and through quantitative sampling volume control and an optimized pipeline material / structure, the adsorption / release and background pollution of the device body to the sample are reduced, so that the representativeness and sensitivity of sampling and the repeatability among different operators / different places are improved.

The utility model relates to a system suitable for purification treatment of organic contaminated soil, which comprises a thermal desorption unit, a primary purification unit, a secondary purification unit, a GWH heat exchanger and an adsorption unit which are connected in sequence, and further comprises a GGH heat exchanger, the thermal desorption unit is of an indirect heating structure and is internally provided with a soil channel and externally provided with a heating channel; the adsorption unit is connected with a recycled flue gas inlet in the heating channel through a purified flue gas pipeline, and a fan is arranged on the purified flue gas pipeline. According to the utility model, the organic polluted soil can be efficiently purified in an industrial plant, the operation is reliable, the investment and operation cost is low, the service life of equipment is long, and secondary pollution is avoided.

The invention relates to the technical field of waste gas filtration and adsorption treatment, in particular to a waste gas treatment mechanism for photoresist production, which comprises a photoresist production waste gas treatment box group, and has the beneficial effects that three independent waste gas treatment units are formed by designing a heat insulation adsorption bin assembly in the photoresist production waste gas treatment box group; an adsorption bed mounting assembly is designed in each group of heat insulation adsorption bin assembly to be matched with an adsorption filter bed assembly, so that waste gas is continuously captured, adsorbed and filtered by a triangular adsorption bed during adsorption and sequentially passes through three waste gas treatment units, and the adsorption filter path of the waste gas is prolonged; during desorption, the triangular adsorption bed keeps rotating opposite to that during adsorption, so that an originally compact adsorption material in the triangular adsorption bed is loosened due to increase of a filling space, and the adsorption effect of organic compounds contained in the waste gas is improved; steam is introduced through the steam dispersing pipe, so that the adsorbed organic compounds are more easily thermally desorbed by the steam, and the desorption efficiency is improved.

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a carbon dioxide trapping system and a carbon dioxide trapping method. Compared with a traditional thermal desorption method, the carbon dioxide trapping system based on external microwave field assisted absorbent catalytic desorption has the advantage that the microwave desorption method has higher energy utilization efficiency. The random packing catalyst has an acid catalysis function, so that the desorption amount and the carbon removal rate of the absorbent can be further improved, and the random packing catalyst has a microwave absorption function, so that heat and mass transfer in the desorption process is enhanced in a hot spot form, and the utilization of microwaves is further improved. The desorption efficiency of 60-80% can be achieved below 102 DEG C, the CO2 desorption rate is far higher than that of a traditional thermal desorption method, and latent heat consumed by water evaporation in the desorption process is remarkably reduced. Meanwhile, the CO2 removal efficiency of the absorption tower is improved, and the cost of the whole carbon capture process can be remarkably reduced.

The invention discloses a solar-assisted in-situ pyrolysis desorption system for soil organic pollutants. The solar-assisted in-situ pyrolysis desorption system comprises a solar heat collection device, a pyrolysis system for heating soil, an extraction system and a tail gas emission treatment system, the solar heat collection device is connected with the pyrolysis system and provides heat energy for the pyrolysis system, the pyrolysis system is connected with the extraction system, and the tail gas emission treatment system is connected with the extraction system. According to the system, a three-layer soil covering system is arranged to replace a traditional cement layer, excavation and transportation are not needed, leakage of polluted soil is avoided, the engineering earthwork volume is reduced, and low carbon and environmental protection are achieved; solar energy is used for providing a heat source for soil in-situ pyrolysis desorption, a tail gas treatment system is arranged, the structure and the working principle are simple, the heat exchange efficiency is high, pollutant desorption is fast, and good popularization value is achieved; the device has the advantages of simple structure, safety and reliability in use, low energy consumption and no tail gas emission, and provides a new scheme for energy conservation and emission reduction of a soil pyrolysis desorption technology.

The utility model discloses a petroleum drilling waste mud solid waste separation device which comprises a multi-layer mud vibrating screen device, a three-phase centrifugal machine device and a thermal desorption device, and the multi-layer mud vibrating screen device comprises a screening mechanism and a stirring mechanism. The screening mechanism comprises a slurry inlet pipe, a first slurry vibration screen and a second slurry vibration screen, the first slurry vibration screen and the second slurry vibration screen are arranged below the slurry inlet pipe, a first conveying belt is arranged at the bottom of the screening mechanism, a stirring mechanism is arranged below the screening mechanism, and a water supplementing pipe is arranged at the top of the outer side wall of the front end of the stirring mechanism. A sludge outlet pipe is arranged at the bottom of one side of the stirring mechanism, the other end of the sludge outlet pipe is connected to the three-phase centrifugal machine device, the second conveying belt is connected to the front side of the thermal desorption device, a heat preservation and insulation layer is arranged on the outer side of the thermal desorption device, and a discharging opening is formed in the bottom of the rear side of the thermal desorption device. The solid-liquid separation and landfill device is reasonable in structural design, can quickly and effectively carry out solid-liquid separation and landfill on the drilling mud, and separates out petroleum organic components.

The utility model belongs to the technical field of soil remediation and improvement, and particularly relates to a soil pollution treatment device. According to the technical scheme, the soil pollution treatment device comprises a soil pollution treatment tank body, and the top of the soil pollution treatment tank body is connected with a slurry liquid inlet pipe used for inputting slurry to be treated; a driving motor is mounted at the top of the soil pollution treatment tank body, the output end of the driving motor is connected with a rotating shaft, and a stirring paddle is fixed on the rotating shaft; an oxidant leacheate pipe is arranged on the soil pollution treatment tank body; a heating pipe is mounted in the soil pollution treatment tank body; the top of the soil pollution treatment tank body is connected with a vacuum exhaust pipe, and a conveying belt is installed in the lower portion of the soil pollution treatment tank body. The utility model provides a soil pollution treatment device. Vapor and treated slurry are separated through thermal desorption treatment and oxidation treatment.

The invention discloses a hydrogen trap characteristic parameter determination method based on a genetic algorithm, and relates to the technical field of hydrogen trap characteristic calculation. Placing the sample in a hydrogen filling device for hydrogen filling treatment, wherein the hydrogen concentration in the sample is saturated; transferring the sample into a heating thermal desorption device for hydrogen desorption treatment, collecting overflowed hydrogen through a mass spectrometer to obtain an actually measured TDS curve, and analyzing the category number of hydrogen traps in the material; according to the McNabb and Foster theories, in combination with an Oriani hypothesis, a calculated TDS curve is obtained; establishing an error function between the actually measured TDS curve and the calculated TDS curve; and according to the error function, a genetic algorithm is adopted to invert and solve the concentration and binding energy of various hydrogen traps. The method can accurately predict the concentration of various hydrogen traps in the material and the characteristic parameters of binding energy, and provides technical support for hydrogen embrittlement prevention design, safety evaluation and the like of steel for hydrogen energy storage and transportation equipment.

The invention discloses a thermal desorption multi-layer cylinder rotary kiln reactor for rapid restoration of site pollution, which comprises a rotary cylinder, a plurality of layers of inner cylinders are arranged in the rotary cylinder, the layers of inner cylinders are arranged in a mutually sleeved manner from inside to outside along the axial direction, the diameters of the plurality of layers of inner cylinders are gradually increased from inside to outside, and the diameters of the plurality of layers of inner cylinders are gradually increased from inside to outside. The interior of the rotary barrel is divided into a plurality of annular cavities by the multiple layers of inner barrels, sieve pores are formed in the side walls of the inner barrels, and the sieve pores in the inner barrel on the inner side are larger than the sieve pores in the inner barrel on the outer side; and a side wall cavity heat source input structure is arranged in the rotary cylinder and forms multi-point surrounding type heat source input corresponding to the annular cavity in the rotary cylinder. By arranging the multi-layer rotary cylinder structure and combining the pore size distribution of the screen, the polluted soil is subjected to heat transfer according to particle sizes in the rotary kiln, and compared with a conventional rotary kiln, under the condition that the cylinder length, the cylinder diameter and the cylinder inclination angle are the same, the rotary kiln can improve the complete reaction degree of materials or improve the treatment efficiency by about 50%.

The invention discloses an in-situ thermal desorption synergistic remediation system suitable for a complex polluted site, and relates to the technical field of site remediation. The intelligent composite heating module is fused with a technology and automatically adjusted according to soil characteristics, and a nano element goes deep into the ground and is rapidly heated; the self-adaptive extraction module adjusts gas extraction according to gas concentration and flow direction; a multi-stage coupling purification module integration technology is used for deeply decomposing pollutants; the multi-source fusion monitoring module adopts multiple monitoring means and 5G data transmission; the cloud control intelligent decision-making module receives monitoring data through cloud computing and artificial intelligence, analyzes and predicts the monitoring data in real time, and automatically adjusts the operation mode of each module. Intelligent heating is accurate and efficient, extraction is adaptive, energy is saved, multi-stage purification deep treatment is achieved, monitoring is accurate, transmission is fast, and intelligent decision-making and real-time adjustment are achieved; and an additive can be accurately injected to promote ecological restoration, complex pollution is efficiently treated, and both environmental protection and economical efficiency are achieved.

The invention relates to a catalytic thermal desorption remediation device and method for organic contaminated soil. The catalytic thermal desorption remediation device comprises a rotationally arranged thermal desorption barrel, a metal screen which is annularly arranged in the thermal desorption barrel and wraps the thermal desorption barrel to form a reaction cavity, a heating structure arranged on the inner wall of the thermal desorption barrel, and a catalyst filled between the heating structure and the metal screen. The reaction cavity is used for containing organic contaminated soil, and the filling rate of the catalyst is 75-95%; the method comprises the following steps: starting a heating structure to control the temperature at reaction temperature; feeding the organic contaminated soil into a reaction cavity and sealing; and then the thermal desorption cylinder is alternately rotated forwards and backwards so as to promote the reaction to remove organic pollutants in the organic contaminated soil, and the treated soil is obtained. Compared with the prior art, the method can be used in the soil thermal desorption process, and the recovery rate, activity, use conditions and practical engineering application effect of the catalyst are ensured.

The invention provides a dry-process low-temperature pulse iodine positive electrode preparation method and a battery, and relates to the technical field of iodine positive electrode preparation, the iodine positive electrode preparation method comprises the following steps: mixing elemental iodine with activated carbon to obtain a carbon-iodine composite material, then putting the solid powdery carbon-iodine composite material, a conductive agent and polytetrafluoroethylene into a high-speed stirrer, and stirring at a high speed; and sequentially carrying out constant-speed intermittent pulse stirring, speed-reducing pulse stirring and speed-increasing pulse stirring, and finally rolling to obtain the iodine positive electrode. According to the stirring operation, the temperature rise effect in the high-speed stirring process is inhibited, the mixture obtained after polytetrafluoroethylene fiberization is obtained through low-temperature pulse stirring, the surface of the prepared iodine positive plate is smooth and flat, the cracking phenomenon does not exist, the shearing force is regulated and controlled through low-temperature pulse stirring, mechanical disturbance is weakened, and the iodine positive plate has the good application prospect. And the temperature is reduced to inhibit thermal desorption of iodine molecules, so that the damage to the iodine adsorption effect of porous carbon is reduced, and the mechanical strength and electrochemical performance of the electrode are remarkably improved.

The invention relates to an industrial organic polluted soil ectopic thermal desorption carbon emission analysis method which comprises the following steps: dividing ectopic thermal desorption process flows, and determining the type of a carbon emission source generated by each process flow; determining a data acquisition and transmission mode in the ectopic thermal desorption process flow; establishing a carbon emission calculation model of each technological process according to the equipment type and the carbon emission source type in each technological process in combination with the carbon emission factor and the polluted soil treatment volume; on the basis of a carbon emission calculation model in each technological process, ex-situ thermal desorption carbon emission traceability analysis is carried out. According to the method, boundary clearness, data acquisition intellectualization, calculation quantification and analysis traceability of carbon emission in the whole ectopic thermal desorption process are realized, the accuracy and scientificity of carbon emission evaluation are improved, a reliable basis is provided for optimization and emission reduction of a polluted soil remediation process, and the method has good popularization and application values.

The invention discloses an anti-deformation efficient degreasing technology for large-size silicon nitride ceramic, and belongs to the technical field of ceramic products. According to the method, industrial honeycomb-shaped activated carbon is adopted to be processed, so that a blank subjected to thermal desorption is completely matched in the honeycomb-shaped activated carbon, the blank is completely fixed in the activated carbon, and a molten binder is sucked out of the blank under the action of capillary force, so that efficient degreasing is realized, and after the binder in the blank is softened at a high temperature, the binder in the blank is subjected to thermal desorption; according to the technology, the defect that the periphery of the blank is not uniform due to removal of the binder can be overcome, and the blank is embedded in the honeycomb-shaped activated carbon, so that the honeycomb-shaped activated carbon plays a certain role in supporting the blank.

The utility model relates to a thermal desorption treatment device for high-concentration mercury polluted soil, which comprises a feeding device, the feeding device comprises a feeding hopper, the bottom of the feeding hopper is connected with the input end of a conveying belt, the output end of the conveying belt is provided with a spiral conveyer, and the output end of the spiral conveyer is provided with an indirect thermal desorption device; the indirect thermal desorption device comprises a material cavity, a combustion cavity is arranged below the material cavity, and a combustor is arranged below the combustion cavity; the tail part of the material cavity is provided with a gas phase treatment device, the gas phase treatment device comprises a high-temperature ceramic dust remover, the upper end of the high-temperature ceramic dust remover is communicated with the upper end of a first-stage condenser through a pipeline, the first-stage condenser is communicated with the upper end of a second-stage condenser through a pipeline, and the second-stage condenser is communicated with the tail part of the material cavity through a pipeline. The second-stage condenser is connected with the upper end of the freezer through a pipeline, the freezer is connected with the demister through a pipeline, and the demister is communicated with the upper ends of the first-stage adsorption tank and the second-stage adsorption tank through pipelines.

The invention discloses an oily sludge thermal desorption treatment system and a treatment process, the oily sludge thermal desorption treatment system comprises a tank body, the feeding end of the tank body is rotatably provided with a connecting sleeve, the oily sludge thermal desorption treatment system also comprises a feeding pipe, the feeding pipe is fixedly connected in the connecting sleeve, one end of the feeding pipe is sleeved with a material guide pipe, the material guide pipe is movably arranged on the feeding pipe, one end of the connecting sleeve is provided with a cleaning piece, and the cleaning piece is in transmission connection with the tank body. According to the device, the movement of the material guiding pipe is controlled through oil sludge in the feeding pipe, so that the material guiding pipe extends into the tank body along the feeding pipe, the oil sludge is extruded out in a strip shape through the discharging hole, the strip-shaped oil sludge extruded out of the material guiding pipe is broken through the cleaning piece, and the phenomenon that the oil sludge is accumulated at the feeding end of the tank body in a lump mode is reduced; the accumulated oil sludge is prevented from being coked on the inner wall of the high-temperature tank body, the material guide pipe is driven by the cleaning piece to rotate along the axis of the feeding pipe, the inner wall of the feeding pipe is cleaned through the arc-shaped strip fixedly connected in the material guide pipe, and the phenomenon that the feeding pipe is blocked due to the fact that the residual oil sludge is dried and caked in the feeding pipe is avoided.

This invention relates to the field of separation, analysis, and detection technology, specifically an apparatus and method for detecting formic acid and acetic acid in baijiu (Chinese liquor) starter and mash. The apparatus includes a rotary thermal desorption sampler, a headspace thermal desorption sampler, pulse valve I, pulse valve II, ion migration tube I, and ion migration tube II. The gas paths are as follows: one path connects to the rotary thermal desorption sampler via pulse valve I and then to ion migration tube I; the other path connects to the headspace thermal desorption sampler via pulse valve II and then to ion migration tube II. Drift gas is connected to dopant gas and then enters the ion migration tube. After sample treatment with methanol, samples for acetic acid detection are injected via the rotary thermal desorption sampler, and samples for lactic acid detection are injected via the headspace thermal desorption sampler. This invention allows for the separate separation and analysis of lactic acid and acetic acid components, reducing the mutual interference of simultaneous detections. Samples only require methanol extraction for analysis, saving four times the time.

The invention relates to the technical field of heat recovery, in particular to a heat energy recovery management method, device, equipment and medium for a compression heat regeneration drying machine. The method comprises the steps that when high-temperature and high-humidity compressed air generated by an air compressor passes through a switching valve, an air guiding instruction is triggered; high-temperature and high-humidity compressed air is respectively guided to a first drying tower in an adsorption mode and a second drying tower in a regeneration mode; in the regeneration process of the second drying tower, preheating desorption is conducted on the drying agent in the second drying tower through high-temperature compressed air flowing through the first drying tower, and high-temperature regenerated gas is generated; the high-temperature regenerated gas is introduced into a regeneration cooler and exchanges heat with a cooling medium, so that the high-temperature regenerated gas is cooled and condensed, and liquid water is separated out; and the cooling medium after heat recovery is conveyed to a heat utilization unit, heat energy recycling is achieved, and operation parameters of the air compressor and the drying tower are coordinated in real time so as to maintain system pressure balance. The effect of improving the heat recovery efficiency during compression heat regeneration is achieved.

The utility model relates to the technical field of waste incineration fly ash treatment, in particular to an online desorption system for removing dioxin in waste incineration fly ash, which comprises a waste incinerator, a feeding device, a gas-ash separating device, a thermal desorption device, an ash collecting device and a high-temperature circulating fan, the feeding device is used for inputting fly ash generated by waste incineration to the thermal desorption device, and a hot air inlet and a hot air outlet of the thermal desorption device communicate with a smoke outlet of the waste incinerator and an air inlet of the gas-ash separation device correspondingly. An air inlet and an air outlet of the high-temperature circulating fan communicate with an air outlet of the gas-ash separation device and an air inlet of the garbage incinerator correspondingly, and an ash outlet of the gas-ash separation device communicates with the ash collecting device. High-temperature flue gas generated by the garbage incinerator exchanges heat with fly ash entering the thermal desorption device, efficient thermal desorption of dioxin in the fly ash is achieved, the dioxin is gasified and discharged from the exhaust port of the gas-ash separation device along with the high-temperature flue gas, and the dioxin is fed into the garbage incinerator to be thoroughly burned and removed.

The application provides a simple gate oxide integrity testing device, which comprises a test sample and a test structure; the test sample comprises a substrate, a dielectric layer (gate oxide layer) on the substrate, a gate replacement layer used for replacing a gate layer or being located above the gate layer, so that the test sample forms a three-layer structure comprising the substrate-dielectric layer-gate replacement layer, and the gate oxide integrity of the dielectric layer is tested by combining a thermal desorption technology; the test structure is used for accommodating the test sample, providing a test temperature, and recording released elements; the application also provides a simple gate oxide integrity testing method, which has the technical effects of low cost, simple operation, and rapid feedback of test results, and does not need to prepare a transistor device, adopts the gate replacement layer arranged on the substrate-dielectric layer (gate oxide layer) to combine the thermal desorption technology, and directly tests the stacked layer material contained in a MOS stacked layer structure.

The utility model discloses a novel thermal desorption treatment and detection combined device, and belongs to the field of soil pollution treatment. According to the device, thermal desorption treatment and a detection device are connected in series for integrated operation, so that the simplicity and convenience of operation are improved; the conditions that the gas purging is too fast and the flow is too large are improved; an air inlet detection method and a liquid inlet detection method are provided and are suitable for different conditions; the loss of the collected pollutants in the transfer process is reduced, the detection accuracy and credibility are improved, and the method has a relatively good application prospect.

This application relates to the field of trace detection technology, and more specifically, to a method for detecting trace gaseous substances, a thermal desorption pre-concentrator, and its preparation method. The preparation method of the thermal desorption pre-concentrator includes: sequentially cleaning, acid-activating, drying, and cutting a metal foam sheet; immersing a metal foam substrate in an adhesive and then removing it; dispersing a particulate adsorbent phase on the surface of the metal foam substrate; guiding the particulate adsorbent phase into and adhering to the internal pore surface of the metal foam substrate through negative pressure filtration to obtain a metal foam substrate loaded with the particulate adsorbent phase; applying a DC voltage to the metal foam substrate loaded with the particulate adsorbent phase; placing the metal foam adsorbent in a housing with an airflow channel, and electrically connecting the metal foam adsorbent to a conductive electrode. This application is advantageous for achieving rapid and complete desorption of the target analyte, improving pre-concentration efficiency, and increasing detection response speed.

The application discloses a quantitative analysis method of tobacco medium-polarity VOCs, which comprises the following steps: S1, inert gas is used to purge tobacco, and meanwhile, the tobacco is heated and sampled, so that the medium-polarity VOCs in the tobacco are collected; and S2, the medium-polarity VOCs in the tobacco are enriched by using MWCNTs-COOH / rGO, then, the medium-polarity VOCs are subjected to thermal desorption, and then, the medium-polarity VOCs are subjected to secondary enrichment and secondary analysis by using a cold trap, and finally, the medium-polarity VOCs are subjected to quantitative analysis by using GC-MS. When the MWCNTs-COOH / rGO is used as the adsorption medium of the thermal desorption of the purge and trap method, the flow rate, time and secondary enrichment temperature of the inert gas purging during the enrichment of the medium-polarity VOCs in the tobacco are simultaneously controlled, so that the quantitative analysis method of the medium-polarity VOCs in the tobacco is established. The enrichment effect of the medium-polarity VOCs in the tobacco is improved, and the accuracy of the quantitative analysis of the medium-polarity VOCs in the tobacco is also improved.

The invention discloses an efficient adsorption and condensation coupled waste gas organic matter recovery system and method, and relates to the technical field of industrial waste gas treatment. Comprising an adsorption concentration unit and an efficient heat exchange and circulation module connected to a desorption gas outlet of the adsorption concentration unit through a pipeline, the deep condensation recovery unit is connected to a desorption gas outlet of the adsorption concentration unit through a pipeline, the catalytic oxidation unit is connected to a heat exchange outlet of the efficient heat exchange and circulation module through a pipeline, and the catalytic oxidation unit is used for controlling the adsorption concentration unit. The energy consumption is obviously reduced by adopting indirect heating desorption and an efficient heat exchange network; the system is high in integration level and capable of achieving full-automatic operation, meanwhile, the recycled organic matter is liquefied and recycled, the resource utilization level is improved, the operation cost is reduced, and meanwhile remarkable environmental protection and economic benefits are obtained.

The invention relates to the technical field of trace detection, in particular to a trace gaseous substance detection method, a thermal desorption preconcentrator and a preparation method of the thermal desorption preconcentrator. The preparation method of the thermal desorption preconcentrator comprises the following steps: sequentially carrying out cleaning treatment, acid activation treatment, drying treatment and cutting treatment on a metal foam sheet; the method comprises the following steps: dipping a metal foam substrate in a binder, taking out the metal foam substrate, dispersing a granular adsorption phase on the surface of the metal foam substrate, and guiding the granular adsorption phase to enter and be attached to the internal pore surface of the metal foam substrate through negative pressure suction filtration, so as to obtain the metal foam substrate loaded with the granular adsorption phase; applying a direct current voltage to the metal foam substrate loaded with the granular adsorption phase; the metal foam adsorption body is arranged in the shell with the airflow channel, and the metal foam adsorption body is electrically connected with the conductive electrode. According to the invention, rapid and sufficient desorption of the target object is realized, and the pre-concentration efficiency and the detection response speed are improved.

The utility model discloses an oil sludge thermal desorption tail gas treatment device which is characterized in that a treatment device main body is of a cubic structure, a plurality of groups of fixing rods are arranged in a filler layer, a plurality of rotatable hollow spheres are fixed on the fixing rods through limiting plates, the bottom of the treatment device main body is of a cone structure, and an annular pipeline is arranged on the cone structure; according to the flue gas treatment device, contact of gas and solid is better achieved, the flue gas treatment effect is improved, the flue gas inlet pipeline extends into equipment for the stability of flue gas inlet, flue gas is dispersed around the flue gas inlet pipeline in a distributed mode, the stability of flue gas exhaust is improved, and the flue gas treatment effect is improved. And the flue gas treatment capacity is further improved.