22213 results about "Oxygen gas" patented technology

The present invention relates to a magnetism generation coil that provides non-invasive treatment by applying a magnetic field to nerve cells or muscle cells of the body. The magnetism generation coil of the present invention comprises: a coil bundle consisting of a collection of a plurality of unit coil strands of a copper material; and a hollow tube surrounding the coil bundle and formed of a flexible material. The unit coil strands forming the magnetism generation coil of the present invention may be formed of an oxygen-free copper (OFC) coil having a low ratio of oxygen to copper.

A system and method for maintaining an oxygen concentration of a biological sample. The oxygen concentration can be maintained by measuring the oxygen concentration within the biological sample and adjusting a rate of an oxygen supplier in response to this measurement. For example, when the oxygen concentration is below a threshold, oxygen can be delivered to the biological sample at a higher rate.

The invention discloses a polyhydroxyalkanoate water-based barrier coating composition and application, and belongs to the technical field of packaging materials. The composition takes water as a dispersion medium and comprises polyhydroxyalkanoate, a plasticizer, an emulsifier and an inorganic nano filler. The stable emulsion with the volume average particle size of 400-700nm is prepared under specific proportioning and process conditions. After the emulsion is applied to a paper substrate according to the dry film coating weight of 10-12 g / m, the obtained coating shows good comprehensive performance: the oxygen permeability is not higher than 580 cm / m.d, the water vapor permeability is not higher than 290 g / m.d, and the heat sealing strength at 130 DEG C is not lower than 5.0 N / 15 mm. The biodegradable paper-based packaging film does not contain fluorine compounds, can be completely biodegraded, and provides a technical path for sustainable paper-based packaging.

The invention provides a concrete prefabricated energy storage cabin which comprises a cabin body and a cabin door which are made of a concrete composite material, so that the energy storage cabin has high compressive strength and high fire resistance rating, and a plurality of energy storage cabins can also be transversely arranged without spacing or stacked in the height direction, so that the occupied area is effectively reduced; an energy storage box provided with a basin-shaped box body and a cover plate is arranged in the cabin body, the cover plate covers the basin-shaped box body to form a closed energy storage cavity for accommodating a battery module, and the basin-shaped box body and the cover plate are also made of a concrete composite material, so that high temperature generated by thermal runaway of a battery in a single energy storage box can be effectively limited in the energy storage box; as the oxygen content in the energy storage box is relatively low, the flame can be automatically extinguished after the battery with relatively light thermal runaway degree is on fire; and for a battery fire with a heavy thermal runaway degree, a long time can be provided for fire fighting and extinguishment, and flames can be extinguished in time in the energy storage box.

A system and method for maintaining an oxygen concentration of a biological sample. The oxygen concentration can be maintained by measuring the oxygen concentration within the biological sample and adjusting a rate of an oxygen supplier in response to this measurement. For example, when the oxygen concentration is below a threshold, oxygen can be delivered to the biological sample at a higher rate.

The invention relates to the technical field of process control, in particular to an intelligent environment monitoring and adjusting system for lip fish culture, which comprises an environment parameter monitoring module, a multivariable linkage calculation module, a self-adaptive adjusting module, a fuzzy logic control module and an abnormity emergency response module. According to the method, the trend value is formed through time-phased grouping analysis and relevance calculation of the water quality parameters, dynamic prediction of the breeding environment change is achieved, the cooperative adjustment capacity among the dissolved oxygen, the water temperature and the ammonia nitrogen concentration is optimized through analysis of the multi-parameter linkage relation, the accuracy of environment control is improved, and the method is suitable for large-scale popularization and application. The cooperation efficiency of oxygen pump frequency and temperature control equipment response is improved through real-time matching calculation of equipment operation parameters, the rapid adaptive capacity to water quality changes is enhanced, abnormal fluctuation monitoring is combined with equipment linkage adjustment, rapid response during water quality sudden change is ensured, and the adverse effect of environment fluctuation on fish growth is reduced.

The invention relates to the technical field of mine ventilation control, in particular to a mine fan ventilation control method and system based on digital twinning. The method comprises the following steps: carrying out data preprocessing on acquired mine monitoring data; performing feature extraction on the preprocessed mine monitoring data; utilizing a random forest algorithm to predict the relationship between the data characteristics and the fan air volume; a digital twinborn model is used for resolving the relation between the data characteristics and the fan air volume, and a fan ventilation control strategy is obtained; and generating a PLC control instruction based on the fan ventilation control strategy. And through multi-source data fusion and deep analysis, the real-time ventilation requirement of the mine can be accurately grasped. Based on random forest algorithm prediction and digital twinborn model calculation, dynamic and accurate adjustment of the air volume of the draught fan is achieved, it is ensured that the concentration of harmful gas in all underground areas is maintained within a safety threshold value, the oxygen content is sufficient, an ideal environment is created for personnel operation and equipment operation, and the safety and reliability of a ventilation system are remarkably improved.

The present disclosure relates to a carbon-based nanomaterial composition that may be formed from a gas mixture and a sulfur powder. The gas mixture may include a carbon based gas, an oxygen gas, and a hydrogen gas. The carbon-based nanomaterial composition may include sulfur doped nanospheres.

The invention discloses a numerical calculation method for simulating combustion of iron powder group particles, belongs to the field of numerical simulation calculation of iron powder combustion, can perform numerical simulation on single-particle and iron powder group combustion under a microgravity condition, quantitatively analyzes the influence of differential diffusion on single-particle iron powder and iron powder group combustion flame temperature, and improves the calculation accuracy of the single-particle and iron powder group combustion flame temperature. And meanwhile, the influence of iron powder combustion characteristics and flame propagation speeds under different iron powder and oxygen concentration conditions is considered. The method has a certain guiding significance in research on low-propagation-speed lean-burn iron powder flames and subsequent application of iron powder fuel. The microgravity environment can eliminate the influence of convection and buoyancy, so that the combustion process is more stable and predictable, and the basic mechanisms of iron powder combustion, including combustion rate, oxidation process, phase change and the like, can be deeply researched.

The invention discloses dust removal equipment for dust explosion prevention and a dust removal method thereof, and relates to the field of dust removal equipment.The dust removal equipment comprises a dust removal box, a plurality of dust removal cloth bags in the dust removal box and a treatment mechanism for dust explosion prevention, the treatment mechanism is composed of a gas mixing assembly, a scraping assembly and a vibration assembly, and a filter bag top frame is connected with a vibration pipe frame through the vibration assembly; the gas mixing assembly is communicated with the dust removal box through a gas inlet pipe, the gas mixing assembly is used for mixing dusty gas and inert gas and preliminarily removing large-particle dust, and the scraping assembly is arranged below the gas mixing assembly and scrapes the filtered large-particle dust; and the vibration assembly is used for periodically vibrating the dust removal cloth bag after the scraping assembly is detached so as to remove fine dust attached to the inner wall of the dust removal cloth bag. Inert gas is introduced and fully mixed before entering the dust removal box, and primary large-particle dust is filtered, so that the oxygen concentration is reduced, and dust explosion is effectively prevented.

The invention discloses an intelligent management system based on metal powder production, and relates to the technical field of industrial automation intelligent management. Sensor arrays are deployed in an ultrasonic atomizer and a vacuum drying furnace, the dust concentration, the vibration frequency, the pressure, the humidity, the temperature and the oxygen concentration are measured in real time, and the current stage is obtained through a production plan; dynamically and finely adjusting the weight matrix according to the sensor parameters corresponding to different stages, generating a weighted comprehensive index, calculating theoretical control parameters based on a physical model, correcting the theoretical control parameters through an LSTM neural network in combination with real-time environmental data, outputting an equipment control instruction, and extracting the sphericity and the moisture residue of the metal powder after the production of the metal powder is completed, so as to obtain the spherical degree of the metal powder. And the production quality is judged, and different responses are adopted according to the judgment result. The multi-parameter cooperative control precision is further improved, and the system stability is enhanced.

The invention provides a redox imidazole covalent organic framework material as well as a preparation method and application thereof, belongs to the technical field of material preparation and photocatalytic preparation of hydrogen peroxide, and aims to solve the technical problem of low activity of a current covalent organic framework in preparation of hydrogen peroxide. The preparation method of the imidazole-connected redox type imidazole covalent organic framework material comprises the following steps: respectively reacting a reactant 2, 7-di-tert-butylpyrene-4, 5, 9, 10-tetraketone monomer with 4, 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ' The preparation method comprises the following steps: mixing 4, 4 '-(pyridine-2, 4, 6-triyl) tribenzaldehyde and a tri (4-formylphenyl) amine monomer, adding a solvent and a catalyst, uniformly stirring, and reacting to obtain the redox type imidazole covalent organic framework material after the reaction is finished. The application comprises the following steps: adding the covalent organic framework, oxygen and the sacrificial agent into water, and reacting under the irradiation of visible light. The preparation method is green, environment-friendly, simple and easy to implement, the prepared material has good thermal stability, and efficient visible light photocatalysis preparation of hydrogen peroxide can be achieved; meanwhile, the catalyst can be recycled and has good photocatalytic stability.

The present application relates to the field of wastewater treatment, and provides a treatment system and method for electroless nickel-plating waste liquid. The treatment system comprises a decomplexing pretreatment system; an oxidation-decomplexing system comprising a redox reactor and a decomplexing reactor which are connected in sequence, wherein an oxidizing agent in the redox reactor is oxygen, and an oxidizing agent in the decomplexing reactor is hydrogen peroxide; a chemical precipitation system comprising a neutralization reaction tank and a sedimentation tank which are connected in sequence, wherein the sedimentation tank is equipped with a filter system; and an evaporation crystallization system comprising an evaporation device, a crystallization device, and a separation device which are arranged in sequence. In the treatment system and method for electroless nickel-plating waste liquid, a two-stage oxidation method is employed to achieve oxidation and decomplexing of the waste liquid; in addition, combining chemical precipitation treatment and evaporation crystallization treatment not only reduces the waste liquid treatment cost but also avoids the introduction of other impurities, and allows for the separation of nickel salts and phosphate salts, so that the operation is easy and convenient, the treatment cost is low, the nickel removal rate is high, and resource utilization of nickel is facilitated.

The invention relates to the field of vacuum bag materials, in particular to an anti-freezing vacuum bag capable of keeping freshness of fresh food and a preparation method of the anti-freezing vacuum bag. The anti-freezing vacuum bag capable of keeping the freshness of the fresh food comprises the following raw materials: matrix resin, a solid filler, a polymerization compound additive, an antioxidant, a reinforcing agent, a toughening agent and the like. The vacuum bag material not only has good mechanical properties, but also can keep good strength stability in a low-temperature use environment, the probability of embrittlement, damage, softening and mechanical property reduction is greatly reduced, meanwhile, the barrier property of the vacuum bag material to molecules such as moisture and oxygen can be guaranteed, and the service life of the vacuum bag material is prolonged. The vacuum bag has excellent environmental moisture and temperature resistance in the long-term use process, the effective ice crystal resisting effect is achieved, the performance requirements of existing consumers for high-performance vacuum fresh-keeping materials are fully met, and very excellent application prospects are achieved.

The invention provides an intelligent aeration system and a control method, and the system comprises a multi-parameter monitoring module which collects parameters such as water depth, pressure, temperature, dissolved oxygen, inlet water ammonia nitrogen, chemical oxygen demand, and mixed liquid suspended solid concentration in real time; the data analysis and preprocessing module adopts a sliding window algorithm to carry out data cleaning and anomaly detection; the oxygen supply demand prediction module establishes an oxygen demand prediction model based on machine learning, and combines theoretical calculation and deep learning prediction; the multi-target intelligent control module adopts a reinforcement learning algorithm, establishes a Markov decision process model, and optimizes the processing effect and energy consumption at the same time; the execution control module is used for accurately adjusting the rotating speed of a fan, the opening degree of a valve and the running state of an aerator; and the system collaborative optimization module realizes linkage control of the aeration system and the carbon source adding system. The system has the functions of self-adaptive parameter adjustment, fault diagnosis and self-recovery, the DO control precision reaches 95% or above, the daily average electricity is saved by 9.7%, the NH4-N of effluent is reduced by 25%, and the annual comprehensive benefit exceeds 500,000 yuan.

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 discloses a method and system for intelligently regulating and controlling the oxygen output concentration of an oxygen generator, and relates to the field of artificial intelligence. The method comprises the following steps: acquiring real-time oxygen output concentration of an oxygen generator and physiological parameter values of a patient; inputting the real-time oxygen output concentration and the physiological parameter value into an oxygen concentration adjusting model to obtain a current target oxygen output concentration matched with the patient; the oxygen output concentration of the oxygen generator is adjusted according to the target oxygen output concentration, so that the oxygen output concentration of the oxygen generator is the target oxygen output concentration; and sending the target oxygen output concentration to terminal equipment bound with the oxygen generator, so that an equipment manager monitors the real-time oxygen output concentration of the oxygen generator in real time through the terminal equipment. The oxygen output concentration of the oxygen generator can be automatically adjusted, manual regulation and control are not needed any more, the risk of manual intervention and potential misoperation is reduced, interaction between the terminal equipment and the oxygen generator can be achieved, and remote monitoring and data synchronization are achieved.

The invention belongs to the field of battery piece manufacturing, and particularly relates to a sintering method and a sintering device for a copper paste battery piece, and the method comprises the following steps: 1) covering and wrapping the battery piece brushed with a copper paste grid line with a flexible isolation film; (2) carrying out oxygen isolation on the battery piece subjected to the step (1); (3) heating the battery piece in the step (2) to the sintering or curing temperature of the copper paste to finish the sintering of the copper paste; and (4) under the state of maintaining the step (2), transferring the battery piece covered with the isolating membrane in the step (3) to a cooling area for cooling, so that the temperature of the battery piece in the step (3) is reduced to be below the oxidation temperature of the copper paste. The problem of how to prevent the copper paste grid line from being oxidized in the battery sintering process is solved.

The invention discloses a low-energy-consumption nitrogen-charging grain storage system and method, and relates to the field of nitrogen-charging grain storage. The method comprises the steps that compressed air is sequentially introduced into a filter set, a drying machine and a micro-oil adsorber to be purified and dried; stripping oxygen O2 molecules and water H2O molecules in the air by using a carbon molecular sieve pressure swing adsorption tower to obtain nitrogen N2 molecular gas; inputting nitrogen N2 molecular gas into a cold drying system, and cooling to a preset temperature range; detecting whether the concentration of the output nitrogen N2 molecular gas meets a preset concentration range or not by using an oxygen analyzer; and when the detected N2 molecular gas concentration of the nitrogen is lower than the lower limit of the preset concentration range, starting a circulating pump to suck the mixed gas in the closed warehouse to the carbon molecular sieve pressure swing adsorption tower for adsorption and nitrogen production again until the N2 molecular gas concentration of the output nitrogen meets the preset concentration range. Aiming at the problem that the nitrogen concentration in nitrogen-filled grain storage is difficult to accurately control in the prior art, accurate control of the nitrogen concentration and yield is realized.

The invention discloses an automatic fire extinguishing device for automatically sensing thermal runaway of a battery of a new energy vehicle. The automatic fire extinguishing device comprises a base, a control box, a fire blanket body, a release assembly and a fire detection probe. The whole base is of a frame-shaped structure and is fixed to a preset position of a vehicle, and a fixed joint strip is arranged on the top face of the base. The fire blanket body is rectangular and comprises a base cloth layer, a coating and a heat insulation filling layer, a positioning strip is arranged on the top face, and heavy drooping blocks are arranged on the two sides. The release assembly comprises a fixed seat, a splicing seat, an electromagnet, a melt strip and a joint block, and the electromagnet adsorbs the heavy drooping block through magnetic force so as to store the fire blanket; the fire behavior detection probe comprises a spectrum sensor, a smoke sensor and an infrared temperature sensor and is used for monitoring fire behavior in real time. When a fire occurs, the control box receives a detection signal to cut off a power supply of the electromagnet, or the melt strip melts at a high temperature to actively cut off power, so that the weight drop block drops to pull the fire blanket body to be completely unfolded and cover a fire area, and the fire is inhibited by blocking oxygen.

The invention relates to the field of steelmaking. More specifically, the invention relates to a process for controlling nitrogen increase in electric furnace smelting. The invention provides a method for producing low-nitrogen steel from electric furnace full waste steel. The method specifically comprises the steps that waste steel is loaded into an electric furnace, CO2 gas is injected into the electric furnace before and after loading, air is exhausted, and micro-positive pressure in the electric furnace is kept. The method comprises the following steps: after an electric furnace forms a molten pool, injecting limestone powder at the top of the furnace with the injection amount of 60-80kg / t and the injection carrier gas of CO2 gas, after the electric furnace forms the molten pool, injecting oxygen and carbon powder by adopting a carbon-oxygen lance to make foamed slag, injecting CO2 gas into the molten pool to decarburize, produce two times of CO gas and intensify denitrification, and during tapping of the electric furnace, protecting steel flow from ending with air by adopting CO2 gas, and feeding into the next process for smelting after tapping of the electric furnace. Application proves that when the method is used for smelting low-nitrogen steel, nitrogen in the electric furnace can be controlled not to be increased, N is smaller than or equal to 0.003% after tapping of the electric furnace, the smelting rate of the low-nitrogen steel grade is increased, and low-carbon emission production of special varieties is achieved.

The invention discloses high-purity lithium sulfide as well as a preparation method and application thereof. The preparation method comprises the step that lithium hydride, lithium hydroxide and a sulfur source are subjected to a heating reaction in a dry inert atmosphere, and the high-purity lithium sulfide is obtained. The molar ratio of lithium hydride to lithium hydroxide is X: (10-X), and X is 1-6. The invention also discloses the prepared high-purity lithium sulfide and application of the high-purity lithium sulfide in preparation of sulfide solid electrolyte. Lithium hydroxide and lithium hydride are mixed to serve as a lithium source in lithium sulfide preparation, the lithium hydroxide quickly and uniformly reaches the reaction temperature by means of the characteristic that the lithium hydride reacts with a sulfur source to release heat and produce gas, the lithium hydride reacts to produce gas, meanwhile, discharging of product water vapor is facilitated, and oxygen in the environment is isolated; and hardening and generation of a side reaction product lithium sulfate are prevented, the conversion rate of lithium hydroxide to lithium sulfide is improved, and the raw material and process cost for preparing lithium sulfide is remarkably reduced.

The invention relates to a preparation method of a high-purity manganese target material, which belongs to the technical field of metallurgy, and comprises the following steps: firstly, drying manganese powder, then pouring the manganese powder into a graphite mold, and putting the graphite mold into a Joule hot sintering furnace for sintering, during sintering, a strategy of two-stage prepressing and four-stage gradient pressing of prepressing forming, low-pressure degassing, medium-pressure densification and high-pressure sintering is implemented, and low-temperature sintering is realized; through two-stage cooling after sintering, stress and cracking in the cooling process are avoided; by accurately controlling the temperature and time of each stage, the defects that high heating temperature and long heat preservation time are needed are overcome. The production process is integrally simplified, the internal stress is controlled to be effectively and gradually released at different temperatures, the porosity is reduced, and sintering cracking is avoided; by optimizing the sintering atmosphere of each stage, the influence of impurities such as oxygen in the air on the purity of the sintered manganese target material is avoided, and the purpose of preparing the high-purity manganese target material with low energy consumption, high efficiency and high quality is achieved.

The utility model discloses a pressure-resistant cross-linked polyethylene power cable which comprises an outer sheath, an armor layer, an oxygen isolation inner protection layer and a flame-retardant wrapping tape layer which are sequentially arranged from outside to inside, and a pressure-resistant cable core, a plurality of power cable cores and a plurality of interval units are arranged in the flame-retardant wrapping tape layer. According to the power cable, the oxygen isolation inner protection layer effectively prevents oxygen permeation and delays aging of the cable, and the flame-retardant belting layer improves the fireproof performance of the cable. The multiple surrounding plate bodies surround the pressure-resistant cable core, and the spacing plate bodies play a role in separating and fixing the power cable core, so that the pressure-resistant capability of the cable is improved, and the overall structure of the cable is more compact and stable. In addition, the insulating layer is made of the cross-linked polyethylene material, so that the cable has good insulating performance, short circuit can be effectively prevented, the safety and reliability of the cable are improved, and power transmission is stable and efficient.

The invention discloses an energy storage power station safety management system capable of realizing thermal runaway grading early warning based on flame-retardant foaming, which is characterized in that a battery module is quickly wrapped and isolated from oxygen by controlling refrigerant spraying and triggering a foaming device to start, a large amount of high-temperature-resistant flame-retardant foaming agent is quickly released, and the thermal runaway grading early warning is realized by combining the refrigerant spraying with a foaming material. The further spreading risk of thermal runaway of the battery module is avoided, and safety management of the energy storage power station is achieved. By controlling the valves, switching of different operation modes can be achieved, and safety management of graded early warning of thermal runaway of the energy storage power station is achieved. According to the system, two stages of grading early warning stages are set for the battery of the energy storage power station, a battery cooling operation mode of the second-stage early warning stage and a battery thermal runaway blocking mode in the first-stage early warning mode are achieved, the battery operation temperature can be reasonably regulated and controlled, the battery operation efficiency is improved, and the energy storage power station is protected. And the risk propagation of thermal runaway of the battery is effectively blocked.

The invention discloses an environment-friendly high-strength water-stop belt and a preparation method thereof, and relates to the technical field of high-molecular compound composition water-stop belts. The environment-friendly high-strength water-stop belt is prepared from the following components in parts by mass: 100 parts of ethylene propylene diene monomer, 40 to 70 parts of reinforcing filler, 10 to 25 parts of environment-friendly plasticizer, 1 to 5 parts of interface modifier, 1.5 to 3.5 parts of vulcanizing agent, 3 to 8 parts of active agent, 1 to 3 parts of anti-aging agent and 5 to 15 parts of flame retardant. White carbon black and calcium carbonate are adopted as reinforcing filler to replace traditional carbon black, and energy consumption and pollution emission in the production process are remarkably reduced. By optimizing the formula and the preparation process, the tensile strength, the elongation at break, the tearing strength and other mechanical properties of the waterstop are remarkably improved. Aluminum hydroxide is added as a flame retardant, absorbs heat during thermal decomposition and forms a barrier layer, so that oxygen is effectively diluted, and fire spreading is prevented.

The invention relates to the technical field of coffee machines. The vacuum coffee machine comprises a container assembly, a sealing structure, a processing structure and a carrier assembly provided with a water source connector. An electric control device, a water pump and a vacuum pump are arranged on the carrier assembly; the treatment structure comprises an integrated container, a blade assembly and a rotary power device; the integrated container is fixed in the carrier assembly and provided with a heating device, a temperature sensor, a rotating shaft hole, a water inlet, an air exhaust hole and a bottom outlet, and the bottom outlet is provided with an outlet valve. The coffee beans are ground, heated and extracted in the only sealed space, and the opportunity that coffee powder is transferred among different units and makes contact with oxygen in air is avoided or reduced, so that the oxidation effect can be minimized, and storage of volatile grease, antioxidants and enzymes in the coffee powder can be maximized.

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.

The invention discloses a production method and a production device of an energy-saving sustainable aviation fuel, and the production method comprises the following steps: S1, adsorbing carbon dioxide in air by using an adsorbent, desorbing through high-temperature carrier gas, and cooling and compressing the desorbed carbon dioxide; s2, carbon dioxide and deionized water are preheated and then electrolyzed, and synthesis gas and oxygen are generated; s3, after the synthesis gas is compressed, performing Fischer-Tropsch reaction to generate a mixture of Fischer-Tropsch oil wax, light hydrocarbon and water, cooling and separating, and returning the Fischer-Tropsch reaction heat to preheat the synthesis gas; s4, pressurizing the Fischer-Tropsch oil wax, mixing the Fischer-Tropsch oil wax with hydrogen, carrying out hydrofining reaction to generate a gas-liquid isomerous oil-gas mixture, cooling and separating, and recycling heat energy of a product to And S5, after gas-liquid separation, preheating a liquid phase, carrying out rectification operation, separating and cooling to obtain a sustainable aviation fuel product. By recovering the heat in each link, the heat is efficiently utilized, and the energy-saving performance of production is improved.