228 results about "Methane gas" patented technology

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.

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.

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 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 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.

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 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 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 invention discloses a natural gas hydrate CT image threshold segmentation method and a storage medium, and belongs to the technical field of natural gas hydrate detection.The method comprises the steps that S1, a natural gas hydrate sample image obtained through synchrotron radiation CT scanning is obtained, the image is preprocessed, and a central area image is obtained; s2, performing edge recognition on the preprocessed central region image by using a convolutional neural network and combining a Sobel operator to obtain an edge feature matrix; s3, clustering the edge feature matrix by adopting a KMeans clustering algorithm, and determining gray boundary values of the solid particles and the methane bubbles; s4, removing gray scale parts of solid particles and methane bubbles in the image according to the gray scale boundary value, and performing maximum and minimum normalization processing on the residual gray scale values of water and hydrates to obtain a gray scale probability density; and S5, drawing a normalized gray probability density map according to the gray probability densities of all the images, and determining a threshold segmentation range of the hydrate according to the probability density peak displacement. The method can automatically extract the hydrate threshold range, and improves the segmentation precision.

This invention relates to a method for evaluating the escape rate of shale gas reservoirs with different dip angles, employing the following technical solution: including the following steps: Step (1) Calculate the drilling angle θ of the plunger sample based on the shale bedding type, calculate the length L of the plunger sample based on the plunger diameter d, and drill the plunger sample based on the drilling angle θ and length L; Step (2) Test the minimum starting pressure P0 of the plunger sample using methane gas; Step (3) Calculate the fluid pressure P of the formation where the plunger sample is located. 流 hydrostatic pressure P 水 Minimum starting pressure P0 and static rock pressure P 岩 Calculate the test pressure Δ for permeability testing p and confining pressure P 围 Step (4) is performed according to the test pressure P determined in step (3). 测 and confining pressure P 围 The permeability of the plunger sample is tested to obtain the permeability k; step (5) calculate the gas escape rate R; step (6) evaluate the shale gas escape capacity of the layer where the sample is located based on the gas escape rate R. The larger the escape rate R is, the stronger the shale gas escape capacity is. Then calculate the shallowest burial depth H where the layer where the sample is located can be effectively preserved.

The invention provides a combined measurement system and method for gas adsorption and resistivity of coal rocks with different temperatures and pressures, and belongs to the field of physical analysis of coalbed methane storage rocks.The gas adsorption system comprises a gas chamber, the gas chamber is connected with a methane gas tank and a nitrogen gas tank through a first valve and a third valve, the gas chamber is connected with a sample holder through a second valve, and the sample holder is connected with a gas storage tank through a third valve. A first pressure gauge is arranged between the air chamber and the second valve, a second pressure gauge is arranged between the second valve and the sample holder, a temperature controller is connected between the air chamber and the sample holder, the sample holder is connected with a constant-flux pump through a fourth valve, and the sample holder is connected with a vacuum pump through a fifth valve; and the sample holder is also connected with the bridge instrument. According to the combined measurement system and method for gas adsorption and resistivity of coal rocks with different temperatures and pressures, under the conditions of different temperatures and pressures, the gas adsorption amount of the coal rocks is accurately measured, the resistivity change of the coal rocks is synchronously monitored, and the dynamic incidence relation of the gas adsorption amount and the resistivity change is established.

This invention relates to the field of new energy and discloses a highly selective photocatalytic method for producing acetone from methane. The method includes: placing a transparent substrate coated with a photocatalyst in a photocatalytic reactor, adding liquid water, introducing methane gas to purge air, sealing the photocatalytic reactor, and conducting a gas-solid two-phase photocatalytic reaction under light irradiation and heating at 50-100°C to generate a liquid oxygen-containing organic compound, primarily acetone. The photocatalyst is BiVO4, ZnO, or a modified photocatalyst based on morphology control, surface modification, semiconductor composite, or elemental doping of BiVO4 or ZnO. This invention uses methane and water as raw materials, reacting with a photocatalyst in a gas-solid two-phase reaction to produce a liquid oxygen-containing organic compound, primarily acetone, with high acetone yield and selectivity. This invention has advantages such as low requirements for the reaction environment, simple and environmentally friendly process, and low cost.

The invention discloses a system for hydrogen production and carbon production through methane cracking synergistically enhanced by plasma. The system comprises a gas source, a cracking reaction bin and a plasma torch, a double-layer stainless steel sleeve catalytic carrier is arranged in the cracking reaction bin, the double-layer stainless steel sleeve catalytic carrier comprises an inner-layer sleeve and an outer-layer sleeve, through holes with the aperture of 5-10 microns are distributed in the inner-layer sleeve, and through holes with the aperture of 20-50 microns are distributed in the outer-layer sleeve; the inner wall of the inner-layer sleeve is coated with a catalytic coating; the gas source provides and conveys methane gas into the cracking reaction bin; and the direct-current plasma torch conveys high-temperature plasma into the double-layer stainless steel sleeve catalytic carrier. A double-layer porous stainless steel sleeve is constructed in a plasma reaction cracking bin to serve as a catalytic carrier to load a catalytic coating, and a deep coupling structure of plasma cracking and catalytic cracking is constructed; and efficient conversion of methane and synchronous preparation of a high-added-value carbon material and high-purity hydrogen energy are realized.

A haz gas detection system includes a haz gas sensor and a controller. The haz gas sensor generates an output indicative of a measured concentration of a gas fuel in an airflow vented from a gas turbine enclosure. The controller is communicatively coupled to the haz gas sensor and receives the output from the haz gas sensor; compares the output of the haz gas sensor to a first threshold, wherein the first threshold is determined for operation of the haz gas sensor with methane gas; receives a valve control signal indicative of a propane valve being open; compares the output of the haz gas sensor to a second threshold, wherein the second threshold is determined for operation of the haz gas sensor with propane gas; and in response the determining that the output of the haz gas sensor exceeds the second threshold, generates an alarm, generates instructions to shut down the gas turbine system, or both.

The invention provides a device and method for smelting magnesium and co-producing carbon nanotubes through carbon thermal reduction in a vacuum electric arc furnace, the device comprises a magnesium smelting electric arc furnace, MgO, coke, biological pyrolytic carbon and methane gas are used as raw materials to be added into molten iron in the magnesium smelting electric arc furnace for carbon thermal reduction, and mixed furnace gas containing metal magnesium steam, iron steam and CO is obtained; the mixed furnace gas is introduced into a heat compensation chamber, iron-containing chloride is introduced into a quenching condenser to be mixed with the mixed furnace gas flowing out of the heat compensation chamber so as to conduct isentropic expansion and cooling treatment on the mixed furnace gas, and then ternary mixed powder is obtained after the mixed furnace gas is cooled through a first cooling chamber; performing metal magnesium vacuum distillation and carbon annealing operation on the ternary mixed powder offline; residual gas in the first cooling chamber is subjected to secondary cooling through the second cooling chamber; and further, carbon thermal reduction magnesium smelting and carbon nanotube co-production are realized.

A quantitative evaluation method for determining the influence of formation water salinity on shale gas reservoir reserves relates to the field of shale gas resource quantity and reserve evaluation, and solves the problem that the existing method is difficult to accurately describe the influence of formation water distribution and salinity on formation water, thereby making the result of calculating the formation gas reservoir reserves inaccurate. The method comprises the following steps: S1: collecting basic data of target shale layer in a target area, and constructing a shale reservoir model consistent with the real underground situation; S2: inserting shale gas into the shale reservoir model; determining the size of the methane gas reservoir in the model; S3: inserting methane gas molecules under different temperatures and pressures into the three numerical models of the reservoir, and recording the calculated methane gas reservoir quantity simulation value; S4: establishing a three-dimensional data coordinate system; S5: establishing a quantitative fitting relationship between the methane gas reservoir quantity simulation value and the underground pressure and salinity conditions. The quantitative evaluation method can accurately calculate the result of the formation gas reservoir reserves.

This invention discloses a subsea pipeline methane leak detection device based on SPR technology, comprising: a gas sampling module for collecting seawater containing methane gas leaking from the subsea pipeline; a methane separation module for separating the methane gas from the seawater collected by the gas sampling module; a gas mixing module for mixing the methane gas separated by the methane separation module with nitrogen; and an SPR detection module for detecting the presence of methane gas in the gas mixing module based on the SPR effect. The detection system provided by this application is expected to enable real-time sampling and detection of subsea pipeline methane leaks using an ROV; the intensity-modulated near-infrared SPR detection device provided achieves a balance between miniaturization and high sensitivity compared to existing technologies.

A methane purification device 1 comprises a flow path 10 through which a methane-containing gas flows, an ozone supply unit 20 that supplies ozone to the gas, and a non-metallic heater 32, which is arranged downstream of the ozone supply unit 20 in the flow path 10 and heats the gas and the ozone. The heater 32 carries a catalyst for purifying the methane by causing the ozone to react with the methane.

The invention relates to a composite functional carrier material and a preparation method thereof, and belongs to the technical field of resource utilization and biological energy. The preparation method comprises the following steps: S1, selecting waste biomass to prepare a matrix material; s2, performing pyrolysis treatment on the base material prepared in the S1 to obtain porous conductive activated carbon; and S3, mixing the porous conductive activated carbon obtained in S2 with a magnetic substance, an iron substance and an enzyme according to a mass ratio of (50-100): (10-50): (5-30): (1-10), and granulating to prepare the composite functional carrier material. The composite functional carrier material prepared by the invention has both environmental protection property and economical efficiency, can effectively inhibit the generation of harmful gases such as hydrogen sulfide and the like while increasing the yield of methane gas in the anaerobic fermentation process, and can realize magnetic recovery and cyclic utilization of the carrier material.

The invention relates to the technical field of rocket injectors, in particular to a novel full-flow oxygen-enriched and methane-enriched gas injector which is characterized in that a mixing pipeline is fixedly mounted in a protective shell, a Y-shaped pipeline is fixedly mounted above the mixing pipeline, one-way valves are fixedly mounted on the two sides of the upper end of the Y-shaped pipeline respectively, and a spiral body is rotatably mounted in the mixing pipeline; an impact disc is fixedly installed on the side wall of the spiral body, evacuation holes are formed above the impact disc, a turbine is fixedly installed above the spiral body, a round hole is formed above the turbine, a spherical cavity is fixedly installed at the bottom of the mixing pipeline, a warping plate is fixedly installed in the spherical cavity, and a spraying pipe is fixedly installed at the bottom of the spherical cavity. And the two high-pressure air flows are subjected to high-speed collision in the Y-shaped pipeline to finish primary mixing. Afterwards, the mixed gas flow enters the mixing pipeline, the turbulence intensity and the mixing uniformity are improved, rotating vortexes are formed in the spherical cavity through flow guide of the warping plate, and therefore an ideal premixed gas source is provided for subsequent ignition and stable and efficient combustion.

The invention provides an electric furnace thermal reduction magnesium smelting co-production silicon carbon negative electrode material and a device thereof. MgO, SiO2, coke, biological pyrolytic carbon and methane gas are used as raw materials and are added into a magnesium smelting electric arc furnace for carbon thermal reduction to obtain mixed furnace gas; the mixed furnace gas enters a quenching condenser to be subjected to isentropic expansion and cooling treatment after being subjected to heat compensation through a heat compensation chamber, and solid-phase particles and cooling furnace gas are obtained; the solid-phase particles and the cooling furnace gas are cooled by a first cooling chamber to obtain ternary mixed powder, and the ternary mixed powder is subjected to the operations of metal magnesium vacuum distillation, magnesiothermic reduction and silicon monoxide disproportionation reaction offline; residual gas in the first cooling chamber is secondarily cooled through the second cooling chamber, and a primary material required by the silicon-carbon negative electrode material is co-produced in a gas-phase reaction mode in the magnesium smelting process, so that near-full continuous production of main links of the silicon-carbon negative electrode material and co-production coupling of carbon thermal reduction of magnesium metal are realized.

The application discloses a biological methanation system and method for sealing CO2 in a salt cave gas storage, and the methanation system comprises a salt cave cavity arranged underground, a first channel conveying device provided with a first channel which is arranged to extend from the ground to the salt cave cavity and is configured to input a biomass waste suspension into the salt cave cavity or output biomass reaction residues, and a second channel conveying device provided with a second channel which is connected with the salt cave cavity and is configured to input supercritical CO2 into the salt cave cavity or discharge methane from the salt cave cavity. The application can meet the requirement of sealing supercritical CO2 in the underground salt cave, and can realize energy and resource utilization of the sealed supercritical CO2, and the final product is high-quality biological methane gas which can be used as household and industrial fuel gas after simple treatment.