362 results about "Kerosene" patented technology

The invention belongs to the technical field of aircraft oil leakage monitoring, and relates to an aircraft oil leakage detection method based on a high-sensitivity mass spectrometry technology, and the method comprises the steps: obtaining a time-resolved mass spectrogram of aviation kerosene molecules in a sample testing stage, and storing the time-resolved mass spectrogram in a database; then oil gas molecules are captured at leakage-prone points of an aircraft pipeline system through a gas collection probe, the captured oil gas molecules are transmitted to an ion source end of a proton transfer reaction mass spectrometer through a negative pressure transmission system to be ionized to generate ions, and the ions are analyzed by a mass analysis system to obtain a mass spectrum; comparing the mass spectrogram obtained by analysis with a time-resolved mass spectrogram in a database, and judging whether leakage occurs or not; based on the method, the problems of insufficient anti-interference capability, difficulty in sample collection and the like of a high-sensitivity mass spectrum oil gas leak detection method can be solved in a targeted manner, and the functions of environmental interference suppression, efficient collection of oil gas molecules, improvement of spatial scanning resolution and the like can be realized at the same time.

The invention discloses an aviation kerosene quality online detection and optimization system based on a green hydrogen substitution technology, and relates to the technical field of quality detection, and the aviation kerosene quality online detection and optimization system comprises a quality monitoring module, an optimization control module and a carbon footprint tracking and verification module. The quality monitoring module monitors the purity of sulfide, aromatic hydrocarbon and hydrogen in real time through a multispectral and electrochemical sensor, determines the optimal mounting position of the sensor by combining hydrodynamic analysis, triggers early warning when the sensor exceeds the standard, and pushes the sensor to the optimization module. The optimization control module dynamically adjusts temperature, pressure and green hydrogen flow based on a deep reinforcement learning algorithm, constructs a multi-objective optimization model, maximizes sulfur removal efficiency, reduces energy consumption and carbon emission, and realizes closed-loop intelligent regulation and control; according to the method, the accuracy and real-time performance of aviation kerosene quality detection and regulation are improved, effective tracking and verification of the green hydrogen full-life-cycle carbon footprint are realized, and the green sustainable development of aviation kerosene production is promoted.

The utility model belongs to the field of hypersonic propulsion, particularly relates to a preheated liquid fuel single droplet generation system under a high-speed incoming flow condition, and aims to solve the problem that in the prior art, a system capable of illustrating different broken forms of preheated liquid fuel single droplets and a droplet breaking kinetic model under the high-speed incoming flow condition is lacked. The kerosene instillation test bench comprises a test bench, a high-speed incoming flow generation system and a kerosene instillation controller, the high-speed incoming flow generation system and the kerosene instillation controller are both fixedly arranged on the test bench, and the input end of the high-speed incoming flow generation system is communicated with the output end of the kerosene instillation controller. According to the method, different broken forms of a single droplet of the preheated liquid fuel and a droplet breaking kinetic model under the high-speed incoming flow condition are clarified, the understanding of the physical process of secondary atomization of transverse injection of different preheated liquid fuels under the high-speed incoming flow condition can be deepened, and meanwhile, a reference is provided for engineering application of an engine injection scheme.

The invention discloses a biomass horizontal carbonization furnace waste heat recovery device and method, and relates to the technical field of carbonization furnaces, the biomass horizontal carbonization furnace waste heat recovery device comprises a horizontal carbonization furnace and a cooling bin, a heat insulation pipeline is fixedly installed on the surface of the horizontal carbonization furnace, a material conveying bin is fixedly installed at the other end of the heat insulation pipeline, and a feeding hopper is fixedly installed at the top of the material conveying bin; a spiral blade rotatably penetrates through one surface, far away from the heat insulation pipeline, of the material conveying bin, and comprises a three-way pipe, the three-way pipe fixedly penetrates through the inner wall and the outer wall of the horizontal carbonization furnace, a valve and a hollow frame are arranged on the three-way pipe, the hollow frame is fixedly mounted on the circumferential surface of the material conveying bin, and the hollow frame is fixedly connected with the three-way pipe; moisture in biomass raw materials is evaporated through the preheating device, it is ensured that the carbonization process of the raw materials is more sufficient, the temperature in the material conveying bin is controlled, and the situation that the raw materials are coked too early, and generated kerosene adheres to the interior of the material conveying bin is prevented.

Systems and methods are provided for co-processing plastic waste in a coker as part of an integrated refinery environment that produces kerosene, jet fuel, and / or jet fuel blending components as a product. The co-processing can be performed in a fluidized coker, a delayed coker, or a combination of fluidized cokers and delayed cokers. After coking, hydroprocessing can be performed on one or more portions of the coker effluent that contribute to formation of the kerosene, jet fuel, and / or jet fuel blending component product(s). The hydroprocessing can be used to reduce or minimize the presence of unexpected nitrogen contaminants in the resulting kerosene, jet fuel, and / or jet fuel blending component product(s).

The invention relates to the field of aircraft maintenance, in particular to an intelligent aviation kerosene and bactericide mixed filling device which comprises a shell and an oil conveying pipeline, the oil conveying pipeline penetrates through the shell, and a fuel oil input connector and a fuel oil output connector are arranged at the two ends of the oil conveying pipeline correspondingly; the bactericide distribution bin is communicated with one end of the bactericide conveying pipeline, the other end of the bactericide conveying pipeline is inserted into the oil conveying pipeline and connected with a three-stage impeller with holes, the three-stage impeller with the holes and the oil conveying pipeline are coaxially arranged, and a fuel oil flow sensor is embedded in the oil conveying pipeline and used for detecting the oil amount in the oil conveying pipeline. An electromagnetic valve and an electromagnetic diaphragm metering pump are installed on the bactericide conveying pipeline, a controller is installed in the shell, the controller is electrically connected with the fuel flow sensor, the electromagnetic valve and the electromagnetic diaphragm metering pump, in the refueling process, kerosene and a bactericide can be intelligently controlled to be mixed, and the mixing effect is guaranteed.

The invention discloses a method for separating and extracting rhenium in smelting waste acid, which comprises the following steps: adding hydrogen peroxide into rhenium-containing waste acid for oxidation, adding Na2S for copper precipitation and molybdenum precipitation, acidifying supernate, extracting by adopting an extraction organic phase formed by mixing TOA, sec-octyl alcohol and kerosene, and carrying out chemical reverse extraction on the extraction phase by using ammonia water, and carrying out condensation crystallization and vacuum filtration on the strip liquor to obtain ammonium rhenate solid powder and the like. According to the method, a separation and extraction method of precipitation-extraction-condensation crystallization is adopted, and high-selectivity extraction of the high-valence rhenium compound is carried out through TOA, so that effective extraction of rhenium can be completed only through primary extraction and reverse extraction, the process period of rhenium extraction is effectively shortened, the total yield of rhenium reaches 99% or above, and the method is suitable for industrial production. And the mass fraction of the produced ammonium rhenate product is greater than 99.9%, and the method has the advantages of low process technology cost and easier realization of industrialization.

The invention discloses a mixed waste plastic recovery and conversion reaction system which comprises a waste plastic raw material bin, a spiral feeder, a reaction furnace, a combustion chamber, a condensing device and an oil storage tank. The reaction furnace is sequentially provided with a feeding end, a reaction area and a discharging end, the reaction area comprises a plurality of reaction sections which are connected in series, the reaction sections are sequentially and continuously arranged along the length of a furnace body, and each reaction section is provided with a temperature control device which is independently opened and closed; the discharging end is communicated with a condensing device, and the condensing device is provided with a condensed kerosene outlet and a non-condensed pyrolysis gas outlet; the non-condensing pyrolysis gas outlet is divided into two paths, one path is communicated with the reaction furnace, and the other path is communicated with the combustion chamber. According to the invention, multiple reaction sections are combined and connected in series, multiple reaction mode combinations are provided, and high-value aviation kerosene can be produced. According to the invention, dechlorination can be effectively carried out before pyrolysis, and equipment corrosion, catalyst poisoning, secondary pollution and the like are prevented; according to the invention, the non-condensed gas is recovered for hydrogenation upgrading of products and self-heating of the system, so that energy is saved.

The invention provides a dual-fuel composite pre-cooling engine system based on jet flow / heat exchanger pre-cooling and a using method of the dual-fuel composite pre-cooling engine system, and relates to the field of aircraft engine systems. An air inlet channel, a fuel pump, a precooler, a jet device, an air compressor, a main combustion chamber, a turbine, an afterburner and an exhaust nozzle sequentially form an engine main body in the axial direction. According to the system, the characteristics of jet flow precooling and heat exchanger precooling are combined, liquid ammonia / kerosene dual-fuel layout is adopted, and a cooling working medium can realize conversion of precooling working places through a control valve according to precooling requirements, so that incoming flow air in different flight states is efficiently precooled; and the problems that a heat exchanger is large in precooling weight and flow resistance and a jet device is poor in precooling heat exchange effect are effectively solved. And finally, the system gives consideration to the simple jet flow pre-cooling structure and the high efficiency of heat exchanger pre-cooling, and the pre-cooling effect and the propelling performance of the pre-cooling engine are effectively improved.

To provide a kerosene composition having proper combustion property as well as excellent lubricity and oxidation stability even when isoparaffin-based base materials are included as its main base material.SOLUTION: A kerosene composition is characterized by containing 15-50 vol.% of an isoparaffin-based base material containing sulfur components, isoparaffin, n-paraffin, and aromatic components at specific amounts, respectively, and having a density at 15°C and a distillation range being in specific ranges, respectively, as well as containing 25-45 vol.% of a hydrodesulfurization kerosene base material containing a specific amount of sulfur components and having a density at 15°C and a distillation range being in specific ranges, respectively, and 15-40 vol.% of a high-pressure hydrotreated base material obtained from a hydrotreated oil of a specified raw oil, containing specific amount of sulfur components, and having a density at 15°C and a distillation range being in specific ranges, respectively, and showing a kinematic viscosity at 30°C of a prescribed value or more.SELECTED DRAWING: None

The present invention provides a method for separating molybdenite and chalcopyrite based on surface oxidation, belonging to the technical field of mineral separation. In this method, molybdenite and chalcopyrite are ground finely. The ground materials are taken and added with water and put into the flotation cell of a flotation machine. After adding hydrogen peroxide and stirring, ultrasonic treatment is carried out for 3 - 5 minutes. After the treatment, the pH of the pulp is adjusted with a pH adjuster, collector kerosene and foaming agent MIBC are added and stirred for 1 - 5 minutes, and then air flotation is carried out to obtain concentrate and tailing products. Under the action of an oxidant, the surface of molybdenite is oxidized, and the oxidation products generated on the surface of molybdenite will fall off during ultrasonic treatment. This oxidation product will inhibit the flotation of chalcopyrite but will not inhibit the flotation of molybdenite. This method can achieve the flotation separation of molybdenite and chalcopyrite without using inhibitors, thereby reducing the reagent cost.

The invention discloses a method for synthesizing sustainable aviation kerosene through CO2 hydrogenation in biogas. The method comprises the following steps: taking Fe / Mn-CaO as a CO2 adsorption separating agent, taking NiMoGa ternary liquid metal as a catalyst for methane decarbonization hydrogen production, and taking a metal oxide-molecular sieve as a catalyst for synthesizing aryl aviation kerosene through CO2 hydrogenation. According to the metal oxide-molecular sieve catalyst for synthesizing the aromatic sustainable aviation kerosene through CO2 hydrogenation, a metal oxide (ABO3) with a perovskite structure is synthesized through a sol-gel method, and the metal oxide (ABO3) is physically mixed with a molecular sieve; a in ABO3 is lanthanum, and a B element comprises iron, chromium, cobalt or nickel; the molecular sieve contains ZSM-5 (Zeolite Socony Mobil-5), ZSM-11 (Zeolite Socony According to the oxide catalyst disclosed by the invention, a polydentate chelate is formed by metal nitrate and citric acid, and a special perovskite structure can be formed through simple drying and roasting, so that the oxide catalyst has excellent carburization resistance, and a formed oxygen-containing intermediate is diffused into a zeolite molecular sieve to form aromatic aviation kerosene; the preparation of aryl aviation kerosene from bio-based CO2 hydrogenation is realized.

The invention discloses a heavy axle rolling method based on rolling differentiation, which comprises the following steps: S1, axle pretreatment: adopting a two-stage cleaning process, firstly performing high-pressure flushing through kerosene at 60-80 DEG C, then performing double-frequency alternate ultrasonic cleaning, and drying with hot air at 70 DEG C after cleaning, so that the surface roughness Ra of the pretreated axle is less than or equal to 1.6 mu m, and the oil stain residual quantity is less than or equal to 5mg / m < 2 >; s2, three-dimensional modeling and stress partitioning are carried out, an axle digital model is established, and stress simulation is carried out. According to the method, a plastic deformation layer of 0.2 mm-0. 3mm and a residual compressive stress field of which the depth is greater than or equal to 0.5 mm are formed on the surface layer aiming at reinforced rolling of a high-stress area, and the range value is-200MPa to-300MPa, so that the tensile stress in the working process is effectively counteracted, the fatigue life of the axle is prolonged, and the service life of the axle is prolonged. According to the stepped rolling technology, surface defects are eliminated through pre-rolling, a uniform strengthened layer is formed through main rolling, the surface quality is optimized through fine rolling, the overall impact resistance of the axle is improved, and the axle can adapt to the severe working condition of long-term heavy-load running of heavy vehicles.

The invention relates to the technical field of metal material surface modification, in particular to AlCrCuMoNi high-entropy alloy powder with high temperature, wear resistance, corrosion resistance and good heat conduction, a coating and a preparation method thereof.The high-entropy alloy powder with the particle size being 15-45 microns and suitable for thermal spraying is prepared through a mechanical alloying method, and then the high-entropy alloy powder is prepared through an oxygen-kerosene supersonic flame spraying technology; the preparation method comprises the following steps: spraying high-entropy alloy powder on the surface of a key part matrix by taking high-entropy alloy as a matrix, oxygen as a combustion improver, kerosene as a fuel, high-purity nitrogen as a powder feeding carrier gas and air as a cooling medium to prepare an AlCrCuMoNi HEA coating; al, Cr, Cu, Mo and Ni elementary substance powder is subjected to ball milling according to the required molar ratio through a mechanical alloying method, AlCrCuMoNi HEA powder is obtained, the coating is prepared through the hypersonic flame spraying technology, the method is suitable for improving the high-temperature abrasion resistance and hot corrosion resistance of the surfaces of key parts in the industries of energy, metallurgy, chemical engineering and the like, and the service life of boiler pipes is prolonged.

The invention provides an intelligent control method, device and equipment for an aviation kerosene preparation system, and the method comprises the steps: obtaining various sample data, the various sample data comprises physical property parameters, distillation range distribution parameters and component content parameters of sample oil, and process parameters of the aviation kerosene preparation system; according to the multiple sample data, a long-short-term memory network algorithm and a physical information neural network algorithm, a prediction algorithm model is established, and the prediction algorithm model is at least used for predicting the yield of aviation kerosene of the aviation kerosene preparation system; according to the prediction algorithm model and the multiple sample data, determining the prediction yield of the aviation kerosene in a first preset time period and multiple operation parameters of the aviation kerosene preparation system in the first preset time period; and adjusting the process parameters of the aviation kerosene preparation system according to the predicted yield of the aviation kerosene and the plurality of operation parameters. The method solves the technical problem of unstable aviation kerosene yield in the aviation kerosene preparation process of the aviation kerosene preparation system.

The present application relates to the technical field of metal material plating, in particular to a kind of γ-TiAl material turbine blade sawtooth crown wear-resistant coating plating method, it includes multi-station special plating device and aviation kerosene oxygen mixed fuel supersonic flame spraying process.Plating device is divided into two kinds of linear arrangement and annular arrangement, respectively realize 15 pieces and 30 pieces of blade one time clamping plating, significantly improve efficiency;Device realizes accurate positioning and non-spraying area protection by positioning block, pressing plate assembly and other structures.Co-Mo-Cr-Si wear-resistant coating is plated by using supersonic flame spraying process, heat input is low, coating is dense, and bonding strength is high;Subsequent grinding processing makes coating surface roughness reach Ra<0.8 μm.The present application solves the problem of high heat input and low construction efficiency in the prior art, and meets the requirements of high precision and high reliability for aeroengine.

The invention relates to the technical field of rectification, and discloses a high-purity isoparaffin efficient rectification upgrading device for aerospace kerosene, which comprises a tank body, the surface of the tank body is fixedly connected with a motor, the output end of the motor is fixedly provided with a rotating rod, the right end of the rotating rod is fixedly connected with a first bevel gear, and the right end of the first bevel gear is fixedly connected with a second bevel gear; a rotating part is rotatably connected to the top end of the inner wall of the tank body, a connecting rod is fixedly connected to the bottom end of the rotating part, a second bevel gear is fixedly connected to the surface of the connecting rod, the second bevel gear is in meshed connection with the first bevel gear, and a rotating cylinder is slidably connected to the surface of the connecting rod. The rotating rod and the first bevel gear are driven by the motor to rotate, so that the second bevel gear and the connecting rod are driven to rotate, and the rotating cylinder and the fixed disc on the surface of the connecting rod are synchronously driven to rotate when the connecting rod rotates, so that the disturbance and mixing effects of gas and liquid phases between tower plates are enhanced, and the gas-liquid mass transfer efficiency is improved.

The invention provides a high-Mach-number boron powder ramjet engine based on air fluidization. The high-Mach-number boron powder ramjet engine comprises a boron powder conveying module and a kerosene conveying module. The boron powder conveying module can convey boron powder to the combustion part; the kerosene conveying module can convey kerosene to the combustion part; and the combustion part is provided with a stable combustion support plate. The problems of boron powder conveying and ignition stable combustion of the high-Mach-number boron powder ramjet engine based on air fluidization are solved, and incoming flow air is directly used as driving gas and fluidizing gas to fluidize boron powder fuel; kerosene is combusted, and injected fluidized air generates a high-temperature low-speed oxygen-enriched area behind the stable combustion support plate, so that removal of an oxide layer on the surface of the boron powder fuel is accelerated, and the combustion effect of the boron powder fuel is improved. The problem that in the prior art, a boron powder fuel conveying system is too complex to be integrated with an engine system is solved, the defects that reliable ignition and stable combustion are difficult to achieve due to the poor ignition combustion characteristic of boron powder fuel are overcome, and high integration of the boron powder fuel conveying system and the engine and ignition stable combustion of the boron powder fuel are achieved.

The invention discloses a kerosene sealing test clamp and method for a graphite sealing device. The test clamp is mainly composed of a sealing ring, a support, a screw, an extrusion flat plate, a nut, a base and an oil inlet nozzle. A cylindrical protrusion is arranged on the upper end face of the base, a cylindrical blind hole is formed in the top face of the cylindrical protrusion and serves as a cavity for containing the graphite sealing device, external threads are machined on the outer surface of the cylindrical protrusion, an oil liquid flow channel is formed in the bottom face of the cylindrical blind hole, the oil liquid flow channel extends to one outer surface of the base, and an oil liquid connector is formed in the surface of the oil liquid flow channel. The oil inlet nozzle is connected to the oil liquid connector, the sealing ring, the support and the nut are installed on the base, the screw is installed on the support, and the extrusion flat plate is placed between the screw and the cylindrical protrusion. During a sealing test, the requirement of the graphite sealing end face displacement is met by controlling the screw pitch of the screw, and axial sealing of the graphite sealing device is achieved through the nut and the sealing ring. Effectiveness of a graphite sealing test is guaranteed, the activity amount of the end face in the test process is accurately controlled, and the sealing effect is good.

The invention relates to the technical field of biofuels, and discloses an aviation kerosene biological alternative fuel based on multi-objective optimization, which is characterized in that a comprehensive selection index system comprising density, kinematic viscosity, thermodynamic characteristics (lower calorific value and hydrogen-carbon ratio) and molecular weight is established based on a multi-objective optimization model constructed by a genetic algorithm; the invention discloses a biological fuel formula for replacing RP-3 aviation kerosene by optimizing the design of biological alternative fuel components, the biological alternative fuel is prepared from the following components in parts by volume: 70-80 parts of second-generation biodiesel, 10-15 parts of tetrahydrofuran and 7-15 parts of isopropanol, the components are easy to obtain, the production process is simple, and the biological alternative fuel is suitable for large-scale production. The second-generation biodiesel, tetrahydrofuran and isopropanol are used as raw materials, the obtained biofuel has low kinematic viscosity, the low calorific value reaches 43 MJ / kg or above, the physicochemical property of the biofuel is similar to that of RP-3 aviation kerosene, and the biofuel has good substitutability and wide popularization value.

The invention relates to the cross technical field of solid waste resource utilization and low-carbon building material preparation, in particular to a seawater and fly ash coal-based solid waste material preparation method which comprises the following steps: step 1, carrying out ball milling modification on fly ash, and filtering impurities from seawater to obtain pretreated seawater; 2, adding a composite alkali activator into the pretreated seawater to prepare an excitation solution, and reacting with the modified fly ash at 60-70 DEG C for 90-120 minutes to obtain an active calcium ion dissolution solution; 3, a trioctylamine-sulfonated kerosene system with the volume ratio being 1: (3-5) is used for extraction for 40-50 min at the temperature of 35-40 DEG C, and chloride ions are removed; and 4, transferring the dechlorinated solution into a high-pressure reaction kettle, introducing carbon dioxide under the conditions of 0.8-1.2 MPa and 55-65 DEG C for mineralization for 180-240 minutes, and curing, drying and demolding the slurry to obtain the finished product material. And the material performance index meets the ocean engineering building material standard.

The present application relates to the technical fields of chemical synthesis, and discloses a kind of aviation kerosene production process and equipment, production process includes: carbon source gas, hydrogen, circulating gas is sent into main reactor reaction and obtains including hydrocarbon, methanol, CO, water and unreacted gas mixed component a;Mixed component a is sent into cascade reactor and is prepared to obtain including aviation kerosene component, light hydrocarbon component and water mixed component b, wherein light hydrocarbon component includes one or more of C2-C7 light hydrocarbon;Mixed component b is fractionally condensed to collect liquid phase and gas phase, and liquid phase is carried out three-phase separation to obtain aviation kerosene component, light hydrocarbon component and water respectively, aviation kerosene component is hydrotreated, fractionation to obtain aviation kerosene.The present application realizes the step-by-step control of reaction path in carbon source hydrogenation process through the synergistic effect of main reactor and cascade reactor, improves the selectivity of aviation kerosene target product, so that the obtained product meets the 3# aviation kerosene standard requirements in key indicators such as distillation range distribution, aromatic content and low temperature performance.

The present invention discloses a method for predicting the ignition of a scramjet combustion chamber, belonging to the technical field of ignition prediction. The method comprises the following steps: numerically simulating the combustion chamber using a three-dimensional density-based steady-state injection; determining whether convergence conditions have been met; extracting flow field data of the combustion chamber after convergence; and calculating the residence time t of aviation kerosene microclusters in the ignition region based on the flow field data. z ; Calculate the ignition delay time t of the ignition area based on the flow field data c Calculate Da in the ignition area. Predict ignition conditions based on Da. The scramjet engine combustion chamber ignition prediction method of the present invention calculates Da based on injection field data and predicts ignition success based on the relationship between Da and 1. This helps adjust actual ignition conditions and improve ignition success rates. It can meet the ignition prediction needs of combustion chambers of various configurations.

The utility model relates to a filler device technology field especially relates to a filler device for kerosene system, including furnace shell, the furnace shell includes main casing and the front door of turnover open, the front door installs at the front end surface of main casing, one side of main casing is installed with positioning bracket, positioning bracket and main casing longitudinal sliding connection, and still install the drive part of adjusting positioning bracket height on furnace shell, the upper end surface fixed mounting of positioning bracket has the filler shell. Through setting up the front door on the furnace shell, and through installing the flow guide shell and the feeding inclined shell on the front door, so in use time can cooperate with the filler shell steady and send fuel into the furnace shell, and through the setting of the filler shell and the feed assembly to ensure that the automatic filling is carried out, ensure that the use is more convenient, and through the setting of the drive part to facilitate the height adjustment of the filler shell and the feed assembly, so in use time can ensure that the feeding is more convenient.

1. The name of the product of this design: Lighter (Voice-controlled Kerosene No. 1). 2. Purpose of the product with this design: This product with this design is a tool for lighting cigarettes or fires. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The application belongs to the technical field of aviation second power system, and discloses an airplane emergency power gas generating system and method based on water enhancement technology, wherein the system adopts fuel oil and high-pressure gas cylinder gas supply to combust in a gas generator, high-temperature and high-pressure gas is generated as the emergency power of the airplane; when the fuel oil and air are mixed and combusted in the gas generator, water is sprayed in the gas generator, water is used as the combustion coolant, and the compressed air amount used by the gas generator after combustion to generate unit gas is reduced. The aviation kerosene and high-pressure air are used as the fuel and oxidant, the fuel system has the advantage of good compatibility with the airplane, the compressed air amount used by the gas generator to generate unit gas is greatly reduced, the working time of the gas generator system is prolonged, the expensive catalyst is not used, and the problems of short service life of the gas generator system and high price of the catalyst of the traditional emergency power system are avoided.

The present invention belongs to the technical field of aviation fuel preparation, and specifically relates to a method for synthesizing thermally stable aviation kerosene from 2,5 - hexanedione. The method comprises the following steps: 1) Using 2,5 - hexanedione as a raw material and an alkali solution as a catalyst, an unsaturated ketone compound with twelve carbon atoms is obtained through an alkali - catalyzed aldol condensation reaction; 2) The unsaturated ketone compound obtained in step 1) undergoes a hydrodeoxygenation reaction under the action of a ternary mixed metal oxide catalyst to obtain a saturated cycloalkane liquid fuel with twelve carbon atoms containing alkyl decalin. The method of the present invention simplifies the current route for preparing alkyl decalin from biomass, and the intermediate products and the final product do not need to undergo a purification / distillation process; significantly reduces the production cost, the raw materials are cheap and easily available, the reaction conditions are mild, and it is suitable for large - scale industrial production.

The present invention provides a process to prepare kerosene, the process at least comprising the steps of: (a) providing a syngas stream comprising hydrogen (H2) and carbon monoxide (CO); (b) subjecting the syngas stream provided in step (a) to a Fischer-Tropsch reaction thereby obtaining a Fischer-Tropsch product comprising at least 50 wt.% of compounds boiling above 370°C; (c) separating the Fischer-Tropsch product into at least a C1-C4 fraction, H2O and a C5+ fraction; (d) subjecting the C5+ fraction as separated in step (c) to hydroprocessing thereby obtaining a mixture comprising at least a kerosene fraction and a heavier fraction; (e) separating the mixture as obtained in step (d) thereby at least obtaining the kerosene fraction and the heavier fraction, wherein the kerosene fraction has a Final Boiling Point of at most 302°C, preferably at most 300°C as determined by ASTM D86-18 and a flashpoint of at least 38°C as determined by IP170, wherein in the separation of step (e) the effective cut point, as determined by ASTM D2892-15 X2, between the kerosene fraction and the heavier fraction is at least 315°C and at most 330°C, and wherein in step (e) a kerosene yield of above 70 wt.% is obtained, based on the weight of the C5+ fraction subjected to hydroprocessing in step (d); (f) recycling at least a part of the heavier fraction as obtained in step (e) to the hydroprocessing of step (d); wherein step d) is carried out by contacting the C5+ fraction with a first catalyst, wherein the first catalyst comprises a molecular sieve with a pore size between 5 and 7 angstrom and a SiO2 / AlO3 ratio of at least 25 and a group VIII metal.

The invention discloses a filtering device suitable for aviation kerosene and a filtering method thereof, and belongs to the technical field of aviation fuel purification and filtration. The cylinder shell, the annular supporting ribs and the main filter material form a filter cylinder, kerosene penetrates through the intervals of the annular supporting ribs from outside to inside and gathers in the central positioning shaft to be led out, in a quasi working state, the filter assembly is disassembled and transversely inserted into an inner cavity of the filter element socket, one end of the filter assembly is fixed in the inner cavity of the filter element socket, and the locking piece is driven to amplify thrust through the force amplifier; the pressing rod linearly extrudes the filter element, the threaded transmission sleeve is rotated through the spiral driving rod, so that the piston pressing disc compresses the cotton core at a constant speed, residual oil is recovered from the bottom liquid drainage hole in the axial direction, and the cotton core is taken out after squeezing; the filter element of the same cylinder is not replaced, only the inner-end fine filter layer is replaced by the reducing fine filter layer with a smaller inner diameter, the through-flow area is suddenly reduced, the local flow speed is increased, the surface of a main filter material is reversely washed, and impurities fall off; the reducing step generates secondary high pressure difference, the fiber gap is further compressed, and the precision is improved.

The invention relates to the technical field of cutting fluid, in particular to cutting lubricating fluid as well as a preparation method and application thereof. The invention provides a special cutting lubricating liquid for finish machining of flutes on the inner wall of an aluminum alloy waveguide, the special cutting lubricating liquid comprises the following components in parts by weight: 89-91 parts of kerosene, 4-6 parts of No.40 engine oil, 0.8-1 part of rapeseed oil, 0.3-0.5 part of tung oil, 0.3-0.5 part of a flame retardant and 0.8-1 part of a penetrant, the composition comprises kerosene, engine oil, rapeseed oil and tung oil, and the flame retardant and the penetrant are supplemented. The lubricating fluid comprehensively solves the problems of built-up edges, oxidation corrosion and cutter wear in deep and narrow flute processing through complementation of advantages of all the components in permeation, lubrication, cooling and film-forming properties.