15639 results about "Nitrogen gas" patented technology

The invention belongs to the field of biochar adsorbing materials, and relates to a method for preparing modified biochar with aquatic plant waste and hematite. The method includes the following steps: (1) naturally drying aquatic plants prior to crushing to obtain aquatic plant powder; (2) crushing the hematite to obtain hematite powder; (3) weighing the hematite powder prior to putting the hematite powder into deionized water, and performing ultrasonic treatment to obtain suspension; (4) weighing the aquatic plant powder, soaking the aquatic plant powder in the suspension, and stirring and drying to obtain fully mixed aquatic plant and hematite mixture; (5) weighing the fully mixed aquatic plant and hematite mixture, putting the mixture in a batch-type atmosphere furnace, and feeding nitrogen into the furnace; performing temperature programming to the target temperature, and maintaining final-temperature pyrolysis; after the pyrolysis process is finished, obtaining the target product, namely the modified biochar. The modified biochar has strong adsorbability in nitrate and phosphate, high in stability and reusable.

The embodiment of the invention provides a liquid nitrogen heating, vaporizing and pressurizing system and a liquid rocket. The liquid nitrogen heating, vaporizing and pressurizing system comprises an oxygen tank, a fuel tank, a liquid nitrogen tank, a liquid nitrogen pump, a cavitation pipe, a liquid nitrogen heater and a liquid nitrogen tank pressurizing pipe. An oxygen tank pressurizing pipe is arranged at the top of the oxygen tank; a fuel tank pressurizing pipe is arranged at the top of the fuel tank; the liquid nitrogen box is arranged in the oxygen box, and the bottom of the liquid nitrogen box is connected with a liquid nitrogen conveying pipe; the liquid nitrogen pump is arranged on the liquid nitrogen conveying pipe; the cavitation pipe is used for stabilizing the liquid nitrogen conveying flow; the liquid nitrogen heater is used for heating liquid nitrogen conveyed by the liquid nitrogen pump into high-temperature nitrogen, the heated nitrogen is used for pressurizing the oxygen tank, the fuel tank and the liquid nitrogen tank at the same time, and the liquid nitrogen heater is connected with the oxygen tank pressurizing pipe and the fuel tank pressurizing pipe. According to the liquid nitrogen heating, vaporizing and pressurizing system, the integrated pressurizing technology is adopted, the pressurizing system is simplified through the technology, meanwhile, the cost and weight of the pressurizing system are reduced through liquid nitrogen heating, vaporizing and pressurizing, and the safety and stability of the pressurizing system are improved.

The invention provides a method and a system for utilizing high-pressure water as a high-temperature compressed air energy storage heat exchange working medium, the system comprises an air compression unit and an air turbine, the pressure of nitrogen output by a nitrogen conveying unit is any saturated vapor pressure which is 10 DEG C lower than the outlet temperature of the air compression unit and corresponds to water vapor in the outlet temperature range of the air compression unit; the energy storage and release unit comprises a first heat exchanger, a shell pass inlet is connected with an air compression unit through a pipeline, a shell pass outlet is connected with an air storage device through a pipeline, a tube pass inlet is connected with a low-temperature water storage tank through a pipeline, and a tube pass outlet is connected with a high-temperature water storage tank through a pipeline; the low-temperature water storage tank is connected with the nitrogen conveying unit through a pipeline, a tube pass inlet of the second heat exchanger is connected with the high-temperature water storage tank through a pipeline, a tube pass outlet is connected with the low-temperature water storage tank through a pipeline, a shell pass inlet is connected with the gas storage device through a pipeline, and a shell pass outlet is connected with the air turbine through a pipeline. The system complexity is reduced, and the investment of heat storage and exchange working media is also reduced.

The invention discloses argon recovery equipment capable of achieving stable rectification and a working method thereof.The argon recovery equipment capable of achieving stable rectification comprises a rectification system, the rectification system comprises a temperature adjusting mechanism and an argon extraction unit, and the argon extraction unit comprises a pure argon tower, an argon tower reboiler, a pure argon pipe set, a first valve set and a stability increasing component; the stability augmentation component comprises a stability augmentation assembly and a temperature detection piece, and the stability augmentation assembly comprises a nitrogen compressor and a nitrogen reboiler. According to the amount of pure argon gasified through heat exchange between pure liquid argon obtained through rectification in the pure argon tower and dried crude argon obtained after cooling in the argon tower reboiler, the supply amount of dry nitrogen is adaptively adjusted through the stability augmentation component so as to adjust the amount of pure argon supplied to the pure argon tower by the nitrogen reboiler; the argon extraction unit and the argon tower reboiler are jointly matched with the actual working condition of the argon tower reboiler, so that the anti-interference capability of the argon extraction unit is improved, the stability of the rectification process is ensured, and the purity of the obtained pure argon is ensured.

The invention discloses a component real-time control method and system for vacuum glow coating, and relates to the technical field of vacuum coating, firstly, in a holographic component collection stage, a sensor and monitoring equipment are used for collecting multi-dimensional data in a coating process in real time, and secondly, in a self-adaptive component adjustment stage, a chromium-nitrogen component prediction value in a vacuum cavity is calculated to obtain a chromium-nitrogen component prediction value; the concentration is compared with the target concentration to judge whether component adjustment is needed or not, then in the real-time strategy adjustment stage, when the components deviate from the target value, the nitrogen flow, bias voltage and target current are automatically adjusted through the equipment management platform to ensure the stability of the coating process, and finally, in the real-time film quality correction stage, the film quality is corrected. The film layer quality is quantified through an innovative calculation formula, the stability and consistency of chromium-nitrogen film coating are improved through closed-loop control, and the film coating process can be dynamically optimized so as to ensure that the final film layer quality meets the design requirement.

The invention provides a system and a method for realizing pneumatic powder conveying by utilizing gas circulation, a gas supplementing inlet is communicated with a recovery dust remover and a recovery buffer tank, the recovery dust remover is communicated with the recovery buffer tank, and the recovery buffer tank is communicated with gas inlets of a plurality of compressors; a gas outlet of the compressor is communicated with a plurality of finished product bins connected in parallel through a gas buffer tank, the finished product bins are communicated with a target bin, and the target bin is communicated with a recovery dust remover through an emptying filter to form circulation. Under the condition that powder exists in a finished product bin or a target bin is not full, stable operation can be continuously carried out, nitrogen is recycled in the conveying process, the nitrogen utilization rate is increased, the emptying amount is reduced, and the waste gas treatment amount is reduced.

The invention discloses a uniformly radial positive electrode material precursor and a preparation method thereof. The cross section of the uniformly radial positive electrode material precursor is uniformly radial, and the shape of the uniformly radial positive electrode material precursor is divided into a core and an outer layer, the core is loose and porous, and the outer layer is in a regular radial shape; the method adopts a coprecipitation method to carry out two-stage reaction preparation, in the first reaction stage, an inner core layer is prepared; a second reaction stage: preparing a shell layer to reach a target particle size; the secondary particle D50 is 6.0-14.0 microns, the TD is greater than 1.90 g / cm, and the BET is less than or equal to 14m < 2 > / g; the precursor is small in structure core and compact in outer layer, particles grow in a radial mode from inside to outside, lithium ions can be separated and embedded out easily, the particle structure is more stable, and excellent rate performance and cycling stability are shown; a staged coprecipitation method is adopted, and controllable growth of a particle structure is realized by accurately controlling the ratio of oxygen to nitrogen and reaction conditions; according to the whole process design, the complex parameter adjusting range is reduced, and the production stability and repeatability are improved.

The invention provides a thermal behavior experiment system and method under a narrow rectangular channel reflooding cooling condition. The system comprises a heating water storage tank, a nitrogen tank, a steam tank, a shield pump, a preheating section, a first direct-current power supply, a second direct-current power supply, a narrow rectangular channel test section, a steam-water separator, a surge tank, a flow control valve, a silencer and an electromagnetic valve. The experimental working medium is deionized water, and re-submerging cooling experiments under different system pressures, working medium supercooling degrees, heating wall surface heat flux densities, working medium submerging speeds, heating wall surface initial temperatures and channel interior initial liquid levels can be carried out on an experimental section of a narrow rectangular channel structure. The device is suitable for narrow rectangular channel structures with different sizes, and can be used for carrying out re-submerging experiments on experiment sections with single-plate double-channel, double-plate three-channel and more channels. The system pressure and the inlet flow in the submerging process can be kept stable, and it can be ensured that the supercooling degree of a working medium, the heating wall surface temperature and the initial liquid level are controllable.

The invention belongs to the field of hydrogen energy, and particularly relates to a hydrogen purification system with a self-repairing function and a purification method. The product hydrogen is used as the regeneration gas, and when the adsorption effect of the adsorbent is reduced, the product gas in the long pipe vehicle can be directly returned to the PSA system for regeneration operation, so that the problem of system replacement caused by regeneration by using nitrogen is effectively avoided, the problem of replacement after regeneration is avoided, and the production time is shortened.

The invention discloses magnetic modified biochar, a preparation method and application of the magnetic modified biochar to adsorption of micro-plastics, and belongs to the technical field of biochar. The method comprises the following steps: pretreating industrial hemp straws, pyrolyzing at 700 DEG C in a nitrogen atmosphere to obtain original biochar, activating with potassium hydroxide, and continuously pyrolyzing in the nitrogen atmosphere to obtain activated biochar powder; soaking the obtained activated charcoal powder in an iron nitrate nonahydrate solution, mixing and stirring, drying and pyrolyzing, washing and drying to obtain the magnetic modified charcoal. Compared with traditional biochar, after the activated biochar is subjected to impregnation-pyrolysis treatment, Fe < 3 + > is introduced into the formed magnetic modified biochar, so that the specific surface area, the pore diameter, the adsorption performance and the magnetism are improved; meanwhile, in the application process of adsorbing the micro-plastics, a magnet can be used for separating the magnetic modified charcoal adsorbent from the micro-plastics, and the effects of recycling and cyclic regeneration are achieved.

The invention discloses a preparation method of a solar cell, and the method comprises the following steps: placing an N-type silicon wafer in a furnace tube of a diffusion furnace, and introducing nitrogen and oxygen into the furnace tube to form a first oxide layer on the surface of the silicon wafer; boron trichloride, oxygen and nitrogen are introduced into the furnace tube, so that a boron diffusion layer is formed on the surface, away from the silicon wafer, of the first oxide layer; introducing nitrogen into the furnace tube, and controlling the temperature of the furnace tube to be a first temperature so as to carry out oxygen-free propulsion of the boron element; introducing nitrogen and oxygen into the furnace tube, and controlling the temperature of the furnace tube to rise from the first temperature to a second temperature so as to carry out aerobic propulsion of the boron element; dry oxygen and wet oxygen are alternately introduced into the furnace tube for multiple times to form a second oxide layer; the temperature in the furnace tube is reduced, and dry oxygen continues to be introduced into the furnace tube; and nitrogen is introduced into the furnace tube, the temperature in the furnace tube is reduced, and boron diffusion of the silicon wafer is completed. According to the preparation method of the solar cell, the silicon wafer can have low surface concentration shallow junctions and uniform sheet resistance.

The single-person oxygen generator comprises a compressor for compressing air and an adsorption assembly for separating nitrogen and oxygen in the air, the adsorption assembly comprises two adsorption tanks, a circulation tank is arranged between the two adsorption tanks, and a spiral sleeve, a rotating rod, a feeding plate and a collecting tank are arranged in the circulation tank; the rotating rod is coaxially and slidably connected with the spiral sleeve, the feeding plate is in threaded connection with the spiral sleeve, the collecting tank is located below the feeding plate, and the feeding plate can move in the circulation tank to screen out broken bodies and powder in molecular sieve particles and change positions of the screened-out molecular sieve particles. The circulation tank of the oxygen generator is used for screening broken bodies and powder of molecular sieve particles, meanwhile, the feeding plate can move the screened molecular sieve particles from the air inlet end to the air outlet end, the adsorption energy efficiency of the molecular sieve at the air inlet end is kept, and the collecting tank in the circulation tank can collect and timely treat the screened broken bodies and powder.

A composite catalyst includes a nickel foam and cobalt, copper, or both electrodeposited on the nickel foam. Making the composite catalyst includes contacting the nickel foam with an aqueous solution comprising copper, cobalt, or both, and electrodepositing nanodomains of copper, cobalt, or both, respectively, on the nickel foam. Electrochemically converting nitrate to ammonia includes contacting an electrode and a cathode comprising the composite catalyst in an electrochemical cell with an aqueous solution including nitrate, adsorbing the nitrate onto the copper, the cobalt, or both, reducing the nitrate to yield nitrite, and reducing the nitrite to yield ammonia.

The invention relates to the technical field of safety and environmental protection, in particular to a negative-pressure circulating explosion-control dust removal method suitable for combustible dust places, which comprises the following steps: firstly, sealing a bin body and injecting carbon dioxide-nitrogen inert gas to generate a low-oxygen environment; then, a flow guide angle-adjustable cyclone separator, a dielectric barrier discharge plasma reactor and a waste heat thermo-acoustic transducer are driven to cooperatively capture dust, and sound node amplitude synthesis capture data are obtained through compressed sensing of a microphone; inputting the environment data and the capture data into a reinforcement learning process containing a micro-thermochemistry model, and outputting instructions for adjusting negative pressure pulse, inert flow, sound field intensity and cyclone geometry; in combination with distributed radio frequency imaging data, an adversarial digital twinborn model is generated to predict explosion free energy, and automatic rollback or shutdown is carried out when the explosion free energy exceeds a threshold, so that a safe, efficient and low-energy-consumption closed loop is formed.

The invention relates to the technical field of motor rotors, and discloses a motor rotor and a machining method thereof.The method comprises the steps that hot forging is conducted on an alloy steel base material based on the preset forging and pressing temperature, and multi-layer gradient cutting is conducted on a rotor initial blank; the method comprises the following steps: performing composite deposition treatment on a cylindrical blank based on a magnetic material, placing the magnetic composite blank in a vacuum environment for dynamic heat treatment, performing dynamic balance finishing on the heat treatment blank based on a preset alloy, performing surface strengthening treatment on a balance rotor in a nitrogen atmosphere, and coating the balance rotor subjected to surface strengthening with a preset coating, the motor rotor with the optimized surface is obtained; and dynamic balance trimming is combined with preset alloy characteristics for microstructure regulation and control, and it is ensured that the rotor has excellent operation stability in a high-rotation-speed environment. And finally, surface strengthening treatment is carried out in a nitrogen atmosphere, and a functional coating is used for covering, so that the wear resistance and corrosion resistance of the surface layer are remarkably improved, and the requirements of a motor system on a high-performance rotor under complex working conditions are met.

The invention belongs to the technical field of drying equipment, and particularly relates to a double-cone vacuum dryer and a silver nitrate drying method.The double-cone vacuum dryer comprises a stock bin, a gas circuit mechanism, a heat source mechanism, a first power mechanism, a blowing adjusting mechanism and a second power mechanism; a second power mechanism drives an arc-shaped plate in a blowing adjusting mechanism to rotate back and forth relative to the transfer bin so as to adjust the direction and the flow speed of the hot nitrogen blown out of an upper opening of the transfer bin, and when the arc-shaped plate rotates clockwise, the silver nitrate wet material which is turned upwards under the action of centrifugal force is blown away; the second power mechanism is matched with the blowing adjusting mechanism to adjust the blowing-out direction and the blowing-out flow speed of hot nitrogen in a reciprocating mode, it can be guaranteed that a dry layer on the surface of the silver nitrate wet material is broken, and the problem that the silver nitrate wet material splashes after the dry layer on the surface of the silver nitrate wet material is broken can be solved; the problems that after a drying layer is formed on the surface of the silver nitrate wet material, the internal heat and mass transfer path is lengthened, and the drying efficiency and the drying time are affected are solved.

The invention relates to the technical field of tobacco curing, in particular to a nitrogen preparation and storage oxygen content automatic control system which comprises a purity and pressure joint control module, a humidity regulation and optimization module, an oxygen content dynamic regulation and control module, a moisture response regulation module and a multi-parameter coupling linkage module. According to the system, intelligent dynamic adjustment is achieved through multi-parameter real-time collection and linkage feedback, synchronous judgment and optimal adjustment path formation between the nitrogen outlet purity and the pressure of each compression section, and matching of the airflow temperature, the wet film area and the nitrogen humidity, it is guaranteed that humidification is uniform and controllable in combination with automatic comparison of the outlet humidity and the storage target standard, and the system is suitable for large-scale popularization and application. The nitrogen injection flow rate and the outlet humidity directly participate in the active response process of oxygen content change, self-adaptive balance of the storage oxygen environment is achieved, moisture monitoring penetrates through the surface layer and the interior, temperature setting and the wet film area are finely adjusted along with the moisture state, and the nitrogen humidity state is finely matched with the tobacco leaf requirement.

The invention discloses a positive electrode material of an upward flow type electrochemical dephosphorization system, and the preparation method comprises the following steps: preparing a polyaniline-coated ZIF-8 derived carbon loaded magnesium-aluminum double-metal hydroxide electrode material, and the preparation process comprises ZIF-8 carbonization in a nitrogen atmosphere, aniline oxidation polymerization, and loading of magnesium-aluminum double-metal hydroxide by a coprecipitation method; the electro-adsorption positive electrode material belongs to a polyaniline magnesium aluminum double-metal hydroxide mesoporous synergistic platform in ZIF-8 derived carbon, and has a nano frame with strong pore accessibility and high electrochemical activity; the synergistic process comprises attraction of polyaniline to phosphate ions and trapping of the magnesium-aluminum double-metal hydroxide. The electrode prepared by the method has a unique mesoporous framework, a large number of phosphorus removal sites are obtained on the surface of the electrode, a rapid ion storage behavior mainly based on a capacitance control process is realized on a solid-liquid interface, phosphate in water can be effectively separated in an electro-adsorption system, and the method is a pollution control process with a clear mechanism.

The invention belongs to the technical field of connectors, and discloses a high-voltage large-current connector which comprises a working box and a plug shell, the inner wall of the working box is fixedly connected with a socket shell, the two ends of one side of the inner wall of the socket shell are fixedly connected with high-voltage terminal pieces respectively, the two sides of the outer wall of the socket shell are fixedly connected with protruding rods respectively, and the high-voltage large-current connector further comprises a plug, when the current connecting mechanism is pulled out of the plug shell, firstly, a connecting block is pushed in the direction close to the working box, the connecting block drives a transverse plate and a bent plate to move, and the bent plate drives a movable plate to push and extrude a sliding plate, so that the sliding plate pushes nitrogen in a fixed shell into a conical head gas pipe; nitrogen enters the socket shell and the plug shell through the conical head gas pipe, generation of an electric arc and consumption of electric arc energy are restrained through the chemical stability of the nitrogen, generation of the electric arc can be effectively restrained, when a high-voltage terminal piece is separated from a high-voltage terminal line, the electric arc energy can be rapidly consumed through injection of the nitrogen, and damage of the electric arc to equipment is prevented.

Provided herein are methods and apparatuses for reducing line bending when depositing a metal such as tungsten, molybdenum, ruthenium, or cobalt into features on substrates by periodically exposing the feature to nitrogen, oxygen, or ammonia during atomic layer deposition, chemical vapor deposition, or sequential chemical vapor deposition to reduce interactions between metal deposited onto sidewalls of a feature. Methods are suitable for deposition into V-shaped features.

The invention discloses a split type vehicle-mounted intelligent oxygen supply system based on the VPSA technology and a control method, and the system comprises an air compressor which is arranged at the inner side of a wheel cover protection plate of a rear wheel of a vehicle and is used for compressing air and discharging the compressed air to a molecular sieve assembly; the molecular sieve assembly is arranged below a spare tire in a trunk of the vehicle and is used for separating nitrogen from oxygen in the air to generate oxygen; the oxygen conveying pipe is arranged on the inner side of the vehicle roof and connected with an oxygen outlet of the molecular sieve assembly, and an oxygen outlet is formed in the position, located above each seat, of the oxygen conveying pipe; the detection module comprises an altitude sensor and an oxygen concentration sensor, the altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is arranged on a ceiling in a vehicle compartment; distributed arrangement is adopted, all parts of the oxygen supply system are installed at different positions of the vehicle, the space occupied by the oxygen generation system can be reduced, and meanwhile directional oxygen supply to specific seats is achieved through the distributed oxygen outlets.

The present invention relates to an in-situ micro-nano impact indentation testing instrument, falling within the technical field of material micromechanical testing. The instrument comprises a nitrogen generation module, an environmental chamber, a high / low temperature loading module, an “optical-infrared” in-situ monitoring module, an “electromagnetic-piezoelectric” coupling impact module, etc. After the nitrogen is introduced into the environmental chamber and the test area is determined by microscopic imaging, the “electromagnetic-piezoelectric” coupling impact module can drive an indenter to indent a specimen. An acoustic emission sensor embedded in the high / low temperature loading module can monitor the surface crack propagation of the specimen. The “optical-infrared” in-situ monitoring module can perform real-time high-speed optical imaging and infrared imaging on the impact indentation process. The present invention can perform micro-nano impact indentation testing on the material at high or low temperatures.

The invention relates to the technical field of high-performance structural ceramic materials and corrosion resistance optimization thereof, in particular to a preparation method of high-performance silicon nitride ceramic, which realizes performance improvement through dynamic optimization of a composite sintering aid, closed-loop regulation and control of air pressure sintering and multi-process data linkage. In the raw material pretreatment stage, a laser particle size analyzer is adopted for monitoring particle size distribution in real time, surface modification parameters are adjusted in a linkage mode, and a uniform monomolecular coating layer is formed; the proportion of rare earth oxide and aluminum oxide in the composite sintering aid is dynamically adjusted according to the fluctuation of the mixing torque, and agglomeration and segregation of the aid are inhibited. And in the air pressure sintering stage, the argon pressure and the heating rate are dynamically adjusted based on the slope of a shrinkage curve, and directional arrangement of beta-phase grains is promoted by combining low-temperature nitrogen protection and high-temperature argon densification. And multi-dimensional process control synergistically optimizes grain boundary components, structure and density, so that the corrosion resistance and the service life of the silicon nitride ceramic in a sulfur-containing environment are remarkably improved and the service life of the silicon nitride ceramic in the sulfur-containing environment is remarkably prolonged.

The invention discloses a pyrolysis recovery system for cooperative treatment of waste wind power blades by a power station boiler, and belongs to the technical field of solid waste recovery. The system comprises a power station boiler, a pyrolyzing furnace, a mixed flue, a nitrogen air flue and a controller. Oxygen is accurately controlled by mixing flue gas at different temperature levels and mixing nitrogen, and a safe and stable heat source is provided for the pyrolyzing furnace; pyrolysis gas returns to a boiler hearth through an outlet flue to be burnt out, and recyclable fibers and residues are conveyed out through a chain grate stoker; and the controller is linked with each sensor to execute oxygen control, temperature regulation, fiber quality protection and safety interlocking operation. The problems that in pyrolysis of the waste wind power blade, heat source adaptability is poor, oxygen concentration is out of control, fiber quality is poor, the risk is high, and pyrolysis gas is difficult to dispose are solved, and gradient utilization of energy, intrinsically safe operation, high-quality and high-purity recovery of fibers and collaborative treatment of pollutants are achieved.

The invention relates to the technical field of battery recycling, and discloses waste ternary lithium battery recycling equipment which comprises a crusher, a crushing roller and a crushing plate, a guide hopper is installed in the crusher, a conveying belt is arranged below the guide hopper, a crushing assembly is arranged on the outer side of the crushing roller, and an air hole used for spraying nitrogen is formed in the side portion of the crushing assembly. A gas conveying assembly is arranged in the crushing roller and communicates with the gas holes. In an oxygen-deficient environment, the crushing assembly extrudes and crushes the lithium battery, and when the lithium battery is crushed, the air holes spray nitrogen to the lithium battery, so that an oxygen-free environment is instantly formed near the lithium battery, and the risk of explosion generated when the lithium battery is crushed is effectively reduced; and the crushing head is driven by the sliding block to move outwards by the same distance for compensation, so that the distance between the end part of the crushing head and the crushing plate is not changed, and a good crushing effect is ensured.

The invention discloses a porous carbon material applied to a silicon-carbon negative electrode as well as a preparation method and application of the porous carbon material, and belongs to the technical field of lithium ion batteries. Uniformly mixing asphalt and mixed acid, heating and fully reacting to obtain acid modified asphalt; dispersing the acid modified asphalt in deionized water to prepare an asphalt aqueous solution, sequentially adding melamine and KOH, uniformly dispersing to obtain a mixed solution, and drying to obtain precursor powder; carbonizing the precursor powder under the protection of nitrogen, and then introducing CO2 or water vapor or mixed gas of the CO2 and the water vapor for activation; and washing and drying the activated product to obtain the porous carbon material. The obtained material has excellent conductivity, stability and high silicon loading performance, and can be applied to the field of lithium ion battery negative electrode materials, a silicon-carbon negative electrode prepared by taking the porous carbon material as a carrier is applied to a lithium ion battery, and the technical effects of high capacity density and long circulation can be achieved.

The invention provides a full-automatic vacuum oxygen-free oven, belongs to the technical field of wafer processing, and solves the problems that an existing wafer oven is low in feeding, discharging, heating and baking efficiency; and the automation degree is low. The full-automatic vacuum oxygen-free oven comprises an oven frame assembly, an EFEM frame assembly, two vacuum pump assemblies and four wafer loaders which are evenly distributed at equal intervals, four cavity assemblies and four automatic door assemblies are arranged in the oven frame assembly, and a robot transplanting assembly and a machine control box are arranged in the EFEM frame assembly. A main control computer is arranged on the left side of the EFEM frame assembly, the cavity assemblies are connected with the vacuum pump assemblies on the same side through exhaust pipelines, and the cavity assemblies are connected with an external high-purity nitrogen source. According to the invention, through cooperation of multiple sensors, mechanical linkage and a gas-liquid cooling system in the whole process, full-automatic stable grabbing and loading, vacuumizing treatment, heating, constant-temperature process baking treatment, dual-mode cooling and taking treatment of wafers in an oxygen-free and high-precision temperature control environment are realized.

The invention discloses a preparation method of a broadband heat-conducting and wave-absorbing gasket and the broadband heat-conducting and wave-absorbing gasket, and relates to the technical field of wave-absorbing materials. The preparation method of the broadband heat-conducting wave-absorbing gasket comprises the following steps: S300, adding pretreated Fe-Si-Al powder into a reaction system of polypyrrole under the protection of nitrogen, and continuously stirring until polypyrrole forms a coating layer on the surface of the pretreated Fe-Si-Al powder; s400, after the reaction in the step S300 is finished, separating a reaction mixture in the step S300 to obtain polypyrrole coated Fe-Si-Al powder, and washing and drying the polypyrrole coated Fe-Si-Al powder; and S500, mixing the dried polypyrrole coated Fe-Si-Al powder with a polymer matrix material, a heat-conducting filler, a curing agent, a dispersing agent, an inhibitor and a catalyst to obtain a mixture, pressing the mixture into sheets, and curing the sheets to obtain the broadband heat-conducting wave-absorbing gasket. By the adoption of the technical scheme, the advantages of being capable of effectively absorbing electromagnetic waves in a broadband and good in heat conduction performance are achieved.

The invention relates to the technical field of gas purification, in particular to a novel start-up method for a PSA (Pressure Swing Adsorption) hydrogen extraction device, which comprises the following steps: on the basis of the working environment of the PSA hydrogen extraction device, checking before start-up is carried out, nitrogen replacement is carried out, the oxygen content of a hydrogen extraction system is controlled within a preset range, and the pressure of the hydrogen extraction system is reduced to normal pressure; the difference between the current environment data and the standard environment data is analyzed, the valve opening degree and the adsorption pressure are adjusted, the equipment operation parameters are optimized to meet the current environment conditions, and an environment parameter adjusting instruction is obtained. By collecting and analyzing the current environmental data, dynamically adjusting the adsorption pressure and the valve opening and connecting the gas quality monitor to collect and analyze the hydrogen purity in real time, the concentration change of impure substances can be found in time, the adsorption time is optimized according to the data, and it is ensured that the hydrogen purity continuously reaches the high standard; and through continuous monitoring and quality verification of the hydrogen purity of the product, the consistency and reliability of the hydrogen product are guaranteed.

The invention discloses a self-rescue device for new energy automobile battery thermal runaway, which comprises a battery monitoring unit, a mounting part and a battery module, a protection box is arranged on the outer side of the lower part of the battery module, the protection box is slidably arranged in a mounting groove formed in the bottom of an automobile, and a sealing mechanism, a support sensing plate and a power mechanism are arranged in the protection box; a self-rescue assembly is arranged in the sealing mechanism and comprises an air storage tank and an exhaust part. According to the self-rescue device for thermal runaway of the battery of the new energy automobile, after an abnormal battery module falls into the protection box, the sealing mechanism is unfolded to completely cover and wrap the battery module, the self-rescue assembly runs immediately, the gas storage tank sprays nitrogen to the battery module through the gas discharging opening in the telescopic gas discharging pipe, the battery module is protected in time, and the service life of the battery module is prolonged. According to the battery module provided by the invention, the situation that fire rapidly spreads is avoided under the condition that the battery module is isolated from the outside, so that normal and intact batteries are prevented from being influenced by abnormal batteries, the batteries which are not abnormal yet are effectively protected, and the practicability is better.