436 results about "Methane gas" patented technology

The invention discloses a system and a method for measuring the release flux of methane in a water body, and belongs to the technical field of measurement of the release flux of methane gas in the water body. When the diffusion flux is measured, the box body is placed on the liquid level of the water body in a floating manner, and the partition plate is arranged below the first opening of the box body at the interval of the first preset distance, so that methane gas released in the form of bubbles in the water body below the partition plate can be prevented from entering the accommodating cavity, and the interference of bubble release on the measurement result can be reduced; the determination accuracy of the diffusion flux is improved. When the bubble flux is measured, the cover body covers the sediment at the bottom of the water body below the box body, and the methane gas released by the sediment is collected by the gas collection container below the liquid level, so that the probability that bubbles are dissolved in the water body in the floating process can be reduced, and the measurement accuracy of the bubble flux is improved.

The invention discloses a porous carbon preparation method and a continuous fluidized bed system.The porous carbon preparation method comprises the steps that rice husks and bamboo fibers are mixed and smashed, the smashed rice husks and bamboo fibers are dried and then mixed with a composite activating agent solution to be steeped, and a pretreated material is formed; feeding the pretreated material into a first-stage fluidized bed, and carbonizing the pretreated product in a nitrogen atmosphere to obtain a carbonized product; feeding the carbonized product into a second-stage fluidized bed, introducing saturated steam and CO2 gas into the second-stage fluidized bed in stages, and activating the carbonized product to obtain an activated product; feeding the activated product into a third-stage fluidized bed, introducing methane gas into the third-stage fluidized bed in an inert gas atmosphere, and performing micropore surface modification on the activated product to obtain a modified product; and washing the modified product with a hydrochloric acid solution and deionized water in sequence, and carrying out vacuum drying to obtain a porous carbon product. According to the preparation method of the porous carbon, the micropore development efficiency is improved, and continuous production of the porous carbon with high specific surface area and high micropore proportion is realized.

The invention relates to a vertical graphene heterojunction and a preparation method thereof, a photoelectric detector and a use method and application thereof, and the method comprises the steps: placing a substrate in a quartz tube, and then carrying out the vacuum pumping; introducing protective gas into the quartz tube and heating the quartz tube to a set temperature; closing the protective gas and vacuumizing again; the method comprises the following steps: firstly, introducing methane into an ethanol solution, and then introducing methane gas containing ethanol steam into a quartz tube so as to grow upright graphene on the surface of a substrate.

According to the quantitative evaluation method for the dynamic output of the adsorbed gas and the free gas of the deep coal bed gas, the gas released by the coal bed rock core sample in the experiment process and the corresponding rock core experiment data are firstly obtained, and a basic data source fitting the actual reservoir characteristics of the deep coal bed is provided for subsequent evaluation. Then isotope value testing is conducted on the gas, a first methane carbon isotope value is obtained, and the fractionation characteristics of the methane gas in matrix holes and cracks are accurately reflected. First gas pressure and first core temperature of the coal bed gas in the matrix hole are calculated, second gas pressure and second core temperature of the coal bed gas in the fracture are obtained through calculation, and accurate characterization of the temperature and pressure field in the reservoir is achieved. Finally, the gas quantity of the adsorbed gas and the free gas of the coal bed gas is obtained through calculation by means of the gas state equation and the isothermal adsorption equation, and the accuracy of quantitative evaluation of the output of the adsorbed gas and the free gas of the coal bed gas is greatly improved through multi-source fitting of simulation experiment data and preset control equation calculation data.

The invention discloses a laser cladding high-entropy alloy carbide ceramic coating and a preparation method thereof, and belongs to the technical field of high-entropy alloy coatings. A laser cladding technology is adopted, a matrix and high-entropy alloy-phenolic resin composite powder are subjected to in-situ melting through a high-energy laser beam, firm metallurgical bonding between the coating and the matrix is achieved, elements at an interface are in gradient transition, and the shear strength exceeds 100 MPa. The single-layer deposition thickness can reach more than 500 microns and can reach the centimeter level through multi-layer accumulation, so that the coating thickness capability is remarkably improved; the prepared coating is high in compactness, the porosity is lower than 5%, and the key technical contradiction that the thickness and the compactness cannot be synergistically optimized in traditional thermal spraying is effectively solved. Besides, the in-situ carbonization reaction under the methane atmosphere is innovatively adopted, the complex high-temperature synthesis process of traditional high-entropy carbide powder is avoided, the preparation cost is greatly reduced, the preparation period is greatly shortened, and the method has the remarkable advantages of being efficient, low in cost and high in performance.

Suppressing methane gas emissions from paddy rice cultivation is extremely important as a measure against global warming. The challenge here is to achieve both improved rice productivity and environmental protection. Specifically, this involves developing a device that can generate large quantities of high-concentration ultrafine bubble (UFB) water in a short time, by adding methane gas emission suppression to the UFB water. [Solution] The UFB generating apparatus of the present invention incorporates a variable-speed rotary stirring device into a UFB generation tank, and this tank is filled with sandy material. By supplying gas and water to this tank at high pressure, the sandy material layer of gas, water, and sandy material is liquefied. By rapidly rotating this liquefied layer with the rotary stirring device, the gas is confined in the pore water of the liquefied layer and then finely fragmented. Furthermore, by using sandy steel slag as the sandy material, in addition to the UFB effect, methane generation due to silica, lime, and iron oxide is suppressed and crop yields are improved.

The invention provides a wide dynamic range methane detection system based on synchronous accumulation and system reconstruction. The device is characterized by comprising a modulated laser (1), a gas absorption cell (2), a photoelectric detector (APD) (3), a variable gain trans-impedance amplifier (TIA) (4) based on a digital potentiometer, a dual-threshold voltage comparator circuit (5) and a microcontroller processing unit (6). The device can be used for large-dynamic-range real-time monitoring of the methane gas concentration, and the problem that a traditional TDLAS system is prone to saturation or limited in detection limit when the concentration span is large is effectively solved. The method can be widely applied to the fields of gas concentration detection, industrial safety control and the like.

The invention relates to the technical field of mining robot mechanical arms, in particular to a mining positive-pressure anti-explosion cooperative mechanical arm and a gas control system and method thereof. The mining positive-pressure anti-explosion cooperative mechanical arm gas control system comprises a gas source processing unit and a gas storage unit, gas is directly taken from a mine laneway environment through a gas pump, the concentration of methane in the gas is detected in real time through a methane gas sensor in a buffer cavity, and a circulating purification and waste discharge path is formed through an electromagnetic valve set; and it is ensured that only qualified gas is stored in the gas storage cavity. The whole machine adopts the vertical layout of the air cavity, the equipment cavity and the mechanical arm body, and the structure is compact; the control method comprises the steps of gas purification, purging, positive pressure maintaining and the like, and through multi-stage pressure sensing and closed-loop control, the stable positive pressure, 50 Pa higher than the ambient atmospheric pressure, in the equipment cavity is dynamically maintained. According to the invention, gas source self-supply in an underground explosive environment of a coal mine is realized, and the device has the advantages of high load self-weight ratio, small transformation degree and reliable operation.

To provide a combustion system capable of suppressing emission of greenhouse effect gas caused by mixed combustion of combustion supporting fuel with mixed gas containing inert gas and hydrocarbon gas while suppressing atmospheric emission of hydrocarbon gas.SOLUTION: A combustion system 1 includes: a membrane separation device 3 that generates process gas Gp obtained by separating at least part of nitrogen gas Gn from mixed gas Gm by using a separation membrane; a boiler 19 capable of burning at least any of methane gas Gh, the mixed gas Gm and the process gas Gp; and a mixed gas control section 6 that controls supply of the mixed gas Gm to the membrane separation device 3. When inert gas ratio determination means 9 determines a ratio is larger than a first threshold value, the mixed gas control section 6 supplies the mixed gas Gm from a mixed gas line 2 to the membrane separation device 3.SELECTED DRAWING: Figure 1

The invention relates to the technical field of gas detection, and discloses a methane gas leakage detection method based on multi-sensor data fusion. According to the method, an absorption intensity sequence and a wavelength drift distance are obtained through a plurality of tunable semiconductor laser absorption spectrum sensors. The method comprises the following steps: constructing a dynamic characteristic association network taking sensor positions as nodes, taking sensor data as node initial states, comparing adjacent node state vectors in a cross manner along a preset path, and calculating a similarity matrix of absorption spectral line characteristics; a sensor subset with a cooperative change pattern is identified, and a background absorption component and a potential leakage signal component are separated from the sensor subset. Performing space-time alignment and integration on the leakage signal to generate a regional fusion concentration distribution diagram, further calculating the methane concentration gradient and change rate, and judging leakage when the methane concentration gradient and change rate exceed a preset threshold value. According to the method, through dynamic network analysis and cooperative signal extraction, the accuracy and anti-interference capability of leakage detection in a complex environment are improved.

The invention relates to a power generation system for coupling methane cracking hydrogen production with a solid oxide fuel cell, which is characterized by comprising a solid oxide fuel cell power generation module, a methane cracking hydrogen production module, an afterburning module and an air preheating module, methane gas passes through the methane cracking hydrogen production module to prepare hydrogen, the prepared hydrogen is respectively fed into the solid oxide fuel cell power generation module and the afterburning module to participate in reaction through a three-way valve, and the air preheating module is used for preheating air and then feeding the air into the solid oxide fuel cell power generation module to participate in reaction. And the afterburning module is used for feeding high-temperature gas generated after the reaction of hydrogen and air into the methane cracking hydrogen production module for providing heat for the methane cracking hydrogen production module. According to the invention, a methane direct cracking hydrogen production process is combined with a solid oxide fuel cell power generation system, so that the problems of tedious process flow, complex system, high carbon emission, large water consumption and the like of a methane hydrogen production coupling solid oxide fuel cell power generation system are solved.

The invention provides an adsorption performance evaluation device of a gas tracer for fracturing monitoring and a use method. The adsorption performance evaluation device comprises a methane supply unit, a tracer injection unit, a standard gas preparation unit and a core unit, the methane supply unit and the tracer agent injection unit are connected with the standard gas preparation unit; the standard gas preparation unit is connected with the core unit. The adsorption performance evaluation device is reasonable in design, the using method is easy to operate, adsorption performance evaluation of the core gas tracer agent under different conditions can be achieved, and data support is provided for application of the gas tracer agent in coal bed gas, tight gas and shale gas fracturing.

A blast furnace operation method according to the present invention is a blast furnace operation method of blowing oxygen gas and a reducing agent containing methane gas into a blast furnace from a tuyere of the blast furnace includes blowing preheating gas having an amount of carried heat greater than or equal to a predetermined amount of heat set in accordance with a blowing amount of the methane gas into the blast furnace from a gas blowing portion provided above the tuyere of the blast furnace in a case where an oxygen concentration in the oxygen gas is 80 vol% or more.

The invention discloses a swallowing type cow rumen sensor and a disease monitoring and early warning system. Comprising a swallowing type dairy cow rumen sensor, a data receiving host and a cloud platform upper computer, the sensor is of a sealed columnar capsule structure, a pH detection assembly, a TDLAS technology-based methane gas sensing system, a temperature sensor, a three-axis attitude sensor and a vibration power generation unit are integrated in the sensor, and the sensor resides in a rumen through a counterweight; the cow behavior recognition module is used for processing the collected posture data in real time based on an edge calculation algorithm built in the main control module so as to realize cow behavior recognition; the data receiving host is configured with a LoRa wireless receiving module and a 4G communication module and is used for receiving and synchronously uploading data; and the cloud platform upper computer analyzes the uploaded multi-dimensional physiological feature data and behavior recognition results based on a deep learning algorithm so as to realize disease diagnosis and accurate feeding decision. The device solves the problem that the deep body sign of the dairy cow is difficult to obtain, and has the characteristics of small size, corrosion resistance, discharge prevention, self power supply and the like.

The present application relates to the technical field of marine engineering geology research, and particularly relates to a deep-sea cold spring system methane gas release simulation device and method based on PIV. The device comprises a stable pressure gas supply module, a simulation reaction module, a control collection module and a visual and PIV synchronous observation module. The stable pressure gas supply module comprises a bubble generation reaction kettle and a membrane gas-liquid pressure stabilizing device, and the membrane gas-liquid pressure stabilizing device is connected in parallel on the gas supply pipeline connecting the bubble generation reaction kettle and the simulation reaction module. The simulation reaction module comprises a flexible airbag valve system and a cold spring environment reaction cabin system, and the flexible airbag valve system is located at the air inlet of the cold spring environment reaction cabin system. The control collection module is used for controlling the bubble generation and directional release, and the visual and PIV synchronous observation module is located outside the cold spring environment reaction cabin system. The device can synchronously obtain the flow field structure, hydrate generation process, and inversion vorticity, shear rate, turbulence statistics, pressure field and acceleration, and provide a reliable experimental platform for revealing the bubble-hydrate-fluid coupling mechanism in the cold spring environment.

The application discloses a catalytic combustion heater principle prototype, which comprises an air tank, a methane tank, a mixed gas tank and a combustion chamber, the air tank is connected with the mixed gas tank through a connecting pipeline, the gas outlet of the mixed gas tank is connected with the methane tank and the combustion chamber through two connecting pipelines respectively, the top of the combustion chamber is provided with a mixed gas inlet, and a blower is arranged outside the combustion chamber, the application simulates the operation state of the underground catalytic combustion heater, high-temperature tail gas released by catalytic combustion mixed gas is used for heating oil shale layers, so that the oil shale is pyrolyzed to obtain the purpose of exploiting oil and gas, the simulation reference result of the experimental prototype can be understood as the actual operation result, the application not only reduces the exploitation cost of the oil shale in-situ conversion exploitation, but also improves the oil and gas exploitation efficiency, reduces the exploitation cost and reduces the harm of the toxic tail gas generated by incomplete combustion to animals, plants and the environment caused by direct release of the toxic tail gas into the atmosphere.

The invention relates to the technical field of near-well region reservoir development, and particularly discloses a method for evaluating the permeability of pilot production near-well region reservoirs by drilling and production working fluid invasion, which comprises the following steps: selecting shallow surface layer muddy silt sediment and fine silt of a target sea area as media, and preparing an overlying stratum core and multiple groups of parallel cores with different porosity and water saturation; putting the sample tube into a holder with a nuclear magnetic cavity, introducing methane gas to generate hydrate, and monitoring pressure and nuclear magnetic signals to obtain a hydrate reservoir core; reversely injecting cold water to test the permeability before liquid phase invasion; injecting a microbial solution and a nutritive salt solution for culture and reinforcement, testing permeability before and after reinforcement, and analyzing the influence; drilling fluid, well completion fluid, reservoir transformation working fluid, transformation working fluid carrying permeation enhancing materials and ethylene glycol mining fluid are injected under the same conditions to simulate invasion, nuclear magnetic signals are monitored, the permeability after invasion is tested, and the damage degree before and after reinforcement and the anti-invasion effect are compared.

The invention belongs to the field of hydrogen production by methane, and provides a reaction device and method for producing hydrogen by pyrolyzing methane by using an ultrasonic synergistic reinforced molten medium, and the reaction device comprises a reaction device cylinder, a thermal insulation layer, a flat cover, an ultrasonic vibration mechanism, a carbon material scraping mechanism and a water-cooling heat dissipation mechanism; a heat preservation layer is arranged on the outer side of the reaction device barrel, an ultrasonic vibration mechanism and a carbon material scraping mechanism are arranged in the reaction device barrel, a water-cooling heat dissipation mechanism is arranged on the outer side of the heat preservation layer, and a flat cover is arranged at the top of the reaction device barrel. The problems that under a traditional high-temperature molten state system, local turbulence fluctuation is caused by large-size vortex capture and trailing vortex entrainment, methane bubble coalescence is caused, the bubble size is too large, and bubble distribution in a drainage basin is uneven are solved, and the gas-liquid mass transfer efficiency and the methane conversion efficiency are effectively improved; and the problem that the manufacturing cost of the device is increased by increasing the height of the reactor for increasing the bubble retention time is solved.

The invention provides a method for efficiently converting low-quality methane gas into methanol by using a plasma catalysis technology, which specifically comprises the following steps: introducing a mixed gas of methane, air and water vapor into a plasma reactor, and generating a liquid product under the action of plasma. By simulating six low-quality coal bed gas systems with different concentrations of 0.5%, 2%, 4%, 6%, 18% and 30% and introducing water vapor into reaction gas, carbon deposition reaction and generation of nitric acid byproducts are remarkably inhibited. Meanwhile, by optimizing key reaction parameters such as discharge power and water inflow, high-selectivity synthesis of a methanol product is realized, and the selectivity of the methanol product can reach 40.9% or above in a full experimental range. Experimental results show that the method has the technical advantages of mild reaction conditions, high product selectivity, remarkable side reaction inhibition and the like.

The present application belongs to the technical field of acetylene preparation, and discloses a method and system for efficiently preparing acetylene and hydrogen from natural gas based on turbine cracking. The method comprises the following steps: obtaining 95%-100% purified methane gas through raw material pretreatment, preheating to 523-823 K, and then feeding into a turbine cracking reaction unit to be heated to 1800-2200 K within 1-10 ms and cracked for 1-10 ms; the cracked gas is quenched to below 800 K within 0.5-3 ms and the waste heat is recovered; finally, carbon black, high-purity acetylene and hydrogen are obtained through gas-solid and gas separation. The system comprises raw material pretreatment, preheating, turbine cracking reaction, quenching and waste heat recovery, gas-solid separation, gas separation units, and a matching monitoring and collaborative control module, and realizes multi-parameter collaborative control and online carbon cleaning. The present application does not introduce oxygen, the conversion rate of natural gas is 92%-95%, the acetylene yield is 83%-87.5%, the energy consumption is low, the products are easy to separate, it is green and environmentally friendly, and it is suitable for industrial continuous production.

This invention discloses a small skid-mounted liquefied natural gas (LNG) unit and its operation method integrating a methane refrigeration system, belonging to the field of natural gas liquefaction technology. The unit includes a methane-rich gas liquefaction system, an expansion refrigeration system, and a methane open-loop refrigeration cycle system. Addressing the shortcomings of existing small skid-mounted LNG technologies, such as large footprint, high investment, and complex operation, this invention innovatively adopts an integrated architecture of "single-stage expansion + methane open-loop refrigeration cycle." The expansion refrigeration system employs a single-stage process of pre-cooling followed by expansion; the methane open-loop cycle uses methane from the feed gas as the refrigerant, eliminating the need for external refrigerant. Through designs such as expansion refrigeration refrigeration backflow branch and methane refrigeration branch, precise cascade utilization of cooling capacity is achieved. This method has few operating variables and is simple to operate. Overall, this invention achieves a highly compact system, low investment and maintenance costs, high energy utilization efficiency, and strong reliability, perfectly meeting the core requirements of small skid-mounted scenarios.

The brine associated gas purification and recovery system comprises a brine pipeline, a gas-liquid separation tank, a gas condenser, a first purification adsorption tank, a natural gas storage tank and a brine pool, the input end of the brine pipeline is connected with the salt well; the input end of the gas-liquid separation tank is connected with the output end of the brine pipeline; the gas output end of the gas-liquid separation tank is connected with the input end of the gas condenser, and the liquid output end of the gas-liquid separation tank is connected with the brine pool; the gas output end of the gas condenser is connected with the input end of the first purification adsorption tank, and the gas output end of the first purification adsorption tank is connected with the natural gas storage tank. The problem that in the prior art, brine associated gas is discharged to pollute the environment is solved, the technical effect of recycling and utilizing methane gas in the brine associated gas is achieved, waste water generated in the system is treated and recycled, the problem that the brine associated gas is discharged to pollute the environment is solved, and the operation stability of the system is improved.

Disclosed is a technique for producing carbon-containing reduced iron by increasing the carbon concentration of metallic iron after a reduction process and cooling the metallic iron in a direct reduction process. The production method of carbon-containing reduced iron according to the present disclosure has a reduction process of bringing a reducing gas into contact with an iron oxide raw material to obtain metallic iron and a cooling process of cooling the metallic iron. The cooling process has a first process of bringing methane gas into contact with the metallic iron after the reduction process to carbonize the metallic iron, a second process of bringing CO gas into contact with the metallic iron after the first process to carbonize the metallic iron, and a third process of bringing methane gas or an inactive gas into contact with the metallic iron after the second process.

The application discloses a natural gas hydrate stratum and wellbore working fluid interaction simulation experiment system, and relates to the field of experimental instruments, which comprises a high-pressure kettle, a gas injection unit, a liquid injection unit, a wellbore working fluid circulation unit, a vacuum preparation module and a monitoring unit; the high-pressure kettle is internally provided with a simulated stratum and a vertical simulated wellbore with a liquid permeation hole; the gas injection unit and the liquid injection unit are respectively used for injecting methane gas and working fluid into the high-pressure kettle; the wellbore working fluid circulation unit comprises a magnetic circulation pump and a high-pressure filter and is used for driving the working fluid to circulate in the simulated wellbore; the vacuum preparation module is used for preparing an initial experimental environment; and the monitoring unit comprises temperature, pressure and displacement sensors, an ultrasonic detection system, a resistivity imaging system and a microscopic imaging system and is used for monitoring and collecting parameter changes of the simulated stratum under the action of multiple physical fields in real time. The application can simulate a wellbore working fluid circulation invasion process and comprehensively evaluate the influence of the working fluid on the stability of a natural gas hydrate stratum and the phase change of hydrates.

The present invention relates to a process for producing a methane-rich gas having an operational production mode and an operational standby mode wherein the standby mode comprises directing a standby process gas comprising hydrogen and less than 0.1 vol% carbon oxide into contact with the material catalytically active for methanation.

The invention relates to the technical field of wastewater treatment, and discloses a chemical wastewater treatment system, which is characterized in that an adjusting tank is used for introducing chemical wastewater, adjusting the pH of the wastewater through a pH regulator, and adding suspended solids to obtain pretreated wastewater; the anaerobic reaction tank is used for introducing the pretreated wastewater, adding an anaerobic bacterium agent, carrying out biogas backflow aeration stirring, and regulating and controlling the biogas backflow flow and the stirring intensity in real time through a fuzzy PID algorithm; the aerobic reaction tank is used for introducing anaerobic effluent, adding an aerobic microbial agent, predicting the degradation-resistant COD (Chemical Oxygen Demand) concentration of the effluent by adopting an LSTM (Long Short Term Memory) model, and if a predicted value is greater than 50mg / L, prolonging the hydraulic retention time by 0.5-1h or increasing the dosage of the microbial agent; the hydrogen incinerator is used for heating anaerobic reaction inlet water to 30-35 DEG C through the heat exchanger; the post-treatment unit is used for discharging or recycling aerobic effluent after the aerobic effluent is subjected to membrane filtration and disinfection and reaches the standard; the degradation-resistant COD (Chemical Oxygen Demand) standard-reaching rate of effluent is improved.

The application provides a spectrum analysis and elimination method and system for water vapor interference of a laser sensor, and the method comprises the following steps: scanning a spectrum interval containing a methane characteristic absorption peak to obtain an original light intensity signal curve A composed of N discrete wavelength points; selecting M wavelength point data outside the range of the methane characteristic absorption peak in the original light intensity signal curve A, and generating a reference signal curve B through a linear regression algorithm; performing point-by-point difference ratio operation on the original light intensity signal curve A and the reference signal curve B to obtain an absorption intensity curve C; counting the number of wavelength points whose absorption intensity values in the absorption intensity curve C continuously exceed a preset threshold T within the range of the methane characteristic absorption peak; and determining that methane gas exists when the number of wavelength points continuously exceeding the threshold T reaches a set number K. In an environment where methane gas and water vapor are mixed together, the accuracy of the sensor detection result of the methane concentration can be effectively improved, and the false positive rate of the sensor in a pure water vapor interference environment can be reduced.

The application discloses a hydrate sediment sample preparation device and method at different stratum depths, and a sample stability-maintaining transfer method. The device comprises a sample preparation kettle placed in a constant-temperature water bath box, an axial pressure loading assembly connected with the sample preparation kettle and used for applying axial pressure load to the sediment sample, and a pore pressure generating assembly connected with a cavity in the sample preparation kettle. The preparation process comprises the following steps: preparing the sediment in the sample container; transferring the sediment sample to a centrifuge; adding axial pressure consolidation; injecting high-pressure methane gas; preparing the sample under supergravity; stopping the centrifuge and moving to liquid nitrogen; sampling under normal gravity while maintaining stability; and transferring the sample while maintaining stability. The application can simulate the preparation of hydrate-containing sediment samples under effective stress levels at different stratum depths in a laboratory supergravity environment, and can transfer the samples to a scanning electron microscope or other microscopic observation device for testing while maintaining the stability of the hydrates.

The application discloses a biomass fermentation process for preparing green methanol, which comprises the following steps: providing a biomass raw material, and fermenting to obtain biogas; obtaining rich-methane gas after crude purification of the biogas; obtaining qualified rich-methane gas after super-precision detoxification of the rich-methane gas; adding medium-pressure steam into the qualified rich-methane gas, and performing a methane steam reforming reaction to obtain a mixed gas; performing PSA treatment on the mixed gas to obtain a resolved gas and a raw material gas; and feeding the resolved gas into a normal-temperature catalytic heat exchange system, and taking the raw material gas as one of raw materials for methanol synthesis to prepare refined methanol. The application realizes full-chain coupling and efficient utilization, combines biomass fermentation, biogas purification and methane steam reforming, and adopts a CO2 circulation technology. The application realizes full-process energy integration: the waste heat in the fermentation process, the waste heat of the PSA resolved gas and the waste water of rectification are utilized to drive the methane steam reforming reaction, the system energy consumption is reduced, and the economic efficiency and sustainability of the system are further improved.

The utility model discloses a rapid pretreatment device for methane samples, which relates to the technical field of pretreatment devices and comprises an extraction valve, the lower end of the extraction valve is communicated with a pretreatment tank used for collecting methane gas, a filter block used for filtering extracted gas is arranged in the extraction valve, and the extraction valve exchanges heat with air through radiating fins. The water inlet in the water conveying seat is communicated with an external circulating pump, the external circulating pump is communicated with a refrigerator to inject a refrigerant, and then the refrigerant at the water outlet is pumped out through the external circulating pump, so that the water circulation condensation work is completed, and the temperature of the pretreatment tank can be quickly reduced; a refrigerant enters the adsorption block through the pretreatment tank to be absorbed, so that the moisture content in the pretreatment tank is effectively reduced, the storage difficulty is reduced, the adsorption block is dried through the water pumping seat, and the adsorption performance of the adsorption block is kept.