63 results about "Flash point" patented technology

The invention discloses a preparation method of modified self-extinguishing insulating oil with flame-retardant and self-repairing functions. Wherein the insulating liquid is mixed oil of mineral oil and palm oil-based modified natural ester, and the inherent high flash point characteristic of the natural ester improves the fireproof safety of the insulating oil. The modified hexagonal boron nitride (h-BN), the magnesium hydroxide nano material and the microcapsule repairing agent are added into the insulating oil, and the h-BN can capture free electrons in the oil, so that the formation and expansion of electric arcs are inhibited, and the breakdown voltage is improved. Magnesium hydroxide is heated to decompose and absorb heat, the fault temperature is reduced, and therefore the arc self-extinguishing effect is achieved. Under the action of a high electric field and a high temperature, the capsule wall of the microcapsule repairing agent is broken, meanwhile, the repairing material is released, a chemical reaction is carried out, and the insulating property of the insulating oil is repaired. The modified insulating oil prepared by the invention has high insulating strength and high flame retardance, and also has a performance self-repairing function, so that the service life of the insulating oil is prolonged.

The present invention discloses a pyrolysis oil and gas cutting device and method, comprising a waste rubber pellet pyrolysis module, a pyrolysis oil and gas high-efficiency cutting module, a pyrolysis oil and gas condensation module, a Roots blower, a non-condensable gas pressure-stabilizing and conveying module, and a control module. By spraying cooling water and circulating non-condensable gas onto the high-temperature pyrolysis oil and gas, the present invention utilizes the vaporization of the cooling water to absorb a large amount of latent heat of phase change, fully condensing the high-temperature pyrolysis oil and gas. Furthermore, the generated water vapor and non-condensable gas reduce the partial pressure of low-flash-point components in the oil and gas, causing them to continuously migrate from the liquid phase to the gas phase. While ensuring that the oil product flash point meets standards, the minimum flash point cutting temperature required for condensation of high-flash-point oil is lowered, thereby increasing the yield of high-flash-point oil.

The invention discloses environment-friendly flame-retardant insulating oil and application thereof, and belongs to the technical field of insulating materials. The environment-friendly flame-retardant insulating oil is used for solving the technical problems that in the prior art, insulating oil needs to have a high flash point and good environment-friendly performance and flame retardant performance, and the environment-friendly flame-retardant insulating oil is obtained by mixing pretreated epoxidized soybean oil and an additive, heating, reacting, adding silicon dioxide gel after the reaction is finished, standing and filtering. Wherein in an inert gas atmosphere, maleic anhydride grafted lignin, DOPO and N, N-dimethylformamide are mixed, stirred, heated and subjected to a reflux reaction, and modified lignin is obtained; the preparation method comprises the following steps: adding hydroxyapatite and lysine into N, N-dimethylformamide, adding a catalyst, and heating for reaction to obtain modified hydroxyapatite; adding the modified lignin, the modified hydroxyapatite and triethylamine into N, N-dimethylformamide, and carrying out heating reaction to obtain an additive; the environment-friendly flame-retardant insulating oil obtained by the invention has relatively high flash point and ignition point and good biodegradability.

The invention discloses an ignition-free closed-cup flash point measuring system for petroleum products. The ignition-free closed-cup flash point measuring system comprises a sample pretreatment unit, a flash separation unit, a constant-temperature control unit, a flash point detection unit and a data processing unit which are communicated in sequence. The sample pretreatment unit is used for removing solid impurities and moisture in a petroleum sample; the flash separation unit is used for converting the pretreated sample into oil vapor and liquid components; the constant-temperature control unit maintains the temperature stability of the system; the flash point detection unit detects the flammable flash state of the oil vapor in an optical mode; the data processing unit records and analyzes the detection data to output a flash point value. The invention further provides auxiliary modules such as a circulating purification unit and a safety monitoring unit, efficient, accurate and safe measurement of flash points of various petroleum products such as gasoline, diesel oil and lubricating oil is achieved through pressure grading flash evaporation and precise temperature control, the detection period is short, the automation degree is high, and the device is suitable for rapid flash point analysis of laboratories and industrial sites.

The application discloses an oil product online detection device and relates to the technical field of oil product detection.The device comprises a detection mounting piece, an elastic supporting piece is installed on the detection mounting piece, the detection mounting piece is used for collecting oil products to be detected, a flash point control piece is installed on the elastic supporting piece, the flash point control piece is used for preventing evaporation and diffusion, a limiting control piece is inserted into the detection mounting piece, the limiting control piece is used for limiting the flash point control piece, an overflow part is installed on the detection mounting piece, and the overflow part is used for guiding oil liquid; the flash point control piece can be used to automatically control the suction of oil products and the heating and evaporation of the steam, and only when the ignition rod passes through the oil pot, the oil pot can normally generate steam to perform flash point testing, so that the problem that the current oil product online detection device is not convenient for automatically controlling the prevention of steam volatilization and diffusion when non-testing is solved.

A method and system for controlling a tank containing a low flashpoint fuel, such as methanol, for powering a vessel is disclosed. The method comprises measuring the temperature of the tank's content and determining whether this temperature exceeds a first threshold temperature, which is below the boiling point of the content. The method further comprises ingressing water into the tank if the measured temperature exceeds the first threshold temperature. The system includes a tank, sensors for measuring temperature, conduits for ingressing water into the tank, valves for controlling the ingress of water, and a computer readable medium for performing the method. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.

An embodiment provides: a foaming agent composition comprising a foaming agent having a flash point of less than 50°C and an ignition inhibitor, wherein the foaming agent composition has a flash point of 100°C or higher or the flash point is not measured; and a polyurethane resin composition comprising an isocyanate component, an isocyanate-reactive component having reactivity with the isocyanate component, and the foaming agent composition.

The utility model provides a flash point determinator with an automatic dry powder extinguishing device, which comprises a flash point determinator, the flash point determinator comprises a determination table, the rear side of the determination table is provided with a rear side plate, the left side of the determination table is provided with a left side plate, the right side of the determination table is provided with a right side plate, and the determination table is provided with an experiment cup. A fire extinguishing device is arranged above the position, opposite to the experiment cup, of the left side plate, the fire extinguishing device comprises a fire source sensor and a shell, a circuit board is arranged in the shell, and a plurality of probes are connected to the side, opposite to the experiment cup, of the circuit board in a circumferential array mode; the signal output end of the fire source sensor is electrically connected with the signal input end of a programmable logic controller, and the signal output end of the programmable logic controller is electrically connected with a starting valve of a dry powder extinguisher. According to the utility model, the fire extinguishing device can be utilized to quickly and effectively extinguish fire when the experiment cup is on fire or boils over and flows during flash point analysis, the automation degree is high, and the harm caused by fire disasters is reduced as much as possible.

This utility model discloses a liquid fuel oil gasification burner head, including an outer shell, an inner liner, a multi-layered sleeve-type gasification core, and a high-pressure ignition needle. The inner liner is nested inside the outer shell to form a U-shaped annular sealed space, and the inner liner wall is provided with upwardly inclined air injection holes. The core is vertically arranged at the center of the inner liner and consists of an inner thin tube, a middle coarse tube, and an outer conical sleeve, forming a two-stage oil passage: the inner thin tube and the middle coarse tube form a first oil passage, and the outer conical sleeve and the middle coarse tube form a second oil passage. An oil outlet is opened at the bottom of the outer conical sleeve, and the tube wall is provided with upwardly inclined air holes. The tip of the high-pressure ignition needle is directly opposite the oil outlet. The technical solution of this utility model can extend the heating path of fuel oil through the multi-layered sleeve, realize the complete gasification of high / low flash point fuel oil (such as ethylene glycol, light white oil, alcohol-based fuels, etc.), and solve the problems of traditional burners not being able to achieve small-flame combustion, incomplete combustion, and black smoke after ignition and shutdown.

The application relates to the technical field of low-flash-point fuel double-wall pipe devices, and discloses a low-flash-point fuel double-wall pipe device and an assembling method thereof, which form a set of high-efficiency welding, folding and mounting processes for the inner pipe and the outer pipe of the double-wall pipe, ensure that the welding requirements are fully met, the mechanical performance of the welding seam is improved, the forming quality of the welding seam is improved, and the one-time inspection qualified rate is high.

Stirring device for stirring a sample in a container which is closable by a lid, for a flash point determination test and / or combustion point determination test, wherein the stirring device comprises a stirring unit which may extend at least partially through the lid for stirring the sample which is arranged in the container, a drive unit which is to be arranged at least partially outside of the lid, for driving, in particular rotationally driving, the stirring unit, a coupling unit for coupling the stirring unit with the drive unit, and an actuation unit which, in particular for adjusting the coupling unit, is actuatable such that selectively in a first actuation position, when pulling up the drive unit, the lid is detachable from the container commonly with the stirring device, or in a second actuation position, when pulling up the drive unit, the drive unit is detachable from the container, and the stirring unit and the lid remain at the container.

The invention discloses a pipeline lightning stroke hazard assessment method, device and equipment, a storage medium and a product. Determining the lightning stroke probability of the target pipe section according to the position of each target ground flash point, the ground lightning density and the initial position and the final position of the target pipe section; under the condition that the lightning stroke probability is greater than a lightning stroke probability threshold value, determining a soil ionization radius of a current ground flash point for each target ground flash point; under the condition that the vertical distance from the current flash point to the target pipe section is smaller than or equal to the soil ionization radius, the breakdown probability of the coating of the target pipe section is determined; under the condition that the breakdown probability is larger than a breakdown probability threshold value, if target heat generated by the maximum lightning current corresponding to the current ground flash point is larger than or equal to a preset heat threshold value, the pipe body ablation depth of the target pipe section is determined; according to the ablation depth of the pipe body, the lightning stroke damage degree of the target pipe section is evaluated. And the accuracy and practicability of pipeline lightning stroke hazard assessment are effectively improved.

The invention discloses high-flash-point graded quenching oil and a preparation method thereof, and relates to the technical field of quenching oil. The high-flash-point graded quenching oil comprises base oil and a composite antioxidant, wherein the base oil comprises trimethylolpropane oleate, and the composite antioxidant comprises a phenolic antioxidant, an amine antioxidant, a first antioxidant synergist and a second antioxidant synergist. According to the technical scheme, the high-flash-point oleate is adopted as the base oil, meanwhile, the composite antioxidant is compounded, the provided high-flash-point graded quenching oil has the extremely high flash point, the open flash point can reach 350 DEG C or above, the use temperature can reach 260-280 DEG C, the high-flash-point graded quenching oil is suitable for quenching cooling of high-hardenability workpieces and high-precision workpieces of thin-wall workpieces, and quenching deformation can be reduced. Meanwhile, the high-flash-point graded quenching oil provided by the invention has excellent oxidation resistance and can prevent oil products from being oxidized and aged too early, so that the service life of the oil products is greatly prolonged, and the use cost is effectively reduced.

The invention belongs to the technical field of heat-conducting oil, and particularly provides high-temperature-resistant heat-conducting oil and a preparation method thereof. The high-temperature-resistant heat-conducting oil comprises composite base oil, an antioxidant, a dispersing agent and a clearing agent, the composite base oil is oligosiloxane in which nano boron nitride is stably dispersed. The high-temperature-resistant heat-conducting oil prepared by the invention has the characteristics of high heat conductivity, high flash point, high use temperature, low residual carbon, low corrosion and long-term stability.

A lubricating oil composition that satisfies the fuel efficiency with a low viscosity and a low traction coefficient, the wear resistance, the usability with a high flash point, and the low temperature fluidity, at high levels, having a base oil having a kinematic viscosity at 40° C. of 3.000 mm2 / s or more and 20.000 mm2 / s or less as a component (A); and a base oil having a kinematic viscosity at 40°° C. of 100.000 mm2 / s or more and 2000.000 mm2 / s or less as a component (B), the component (A) having a flash point of 180° C. or more, the lubricating oil composition having a content of the component (B) of 0.01% by mass or more and 2.00% by mass or less based on the total amount of the lubricating oil composition, a lubricating method using the same, and a transmission including the same.

The layered punch-formed quick-burning grilled charcoal comprises a quick-burning layer and a burning layer which are combined through punching, the quick-burning layer is composed of low-temperature biomass carbon residue powder, auxiliary carbon powder and a complexing agent I; the combustion layer is composed of high-temperature carbon powder, high-temperature biomass carbon residue powder and a second complexing agent. The layered design of rapid combustion and continuous combustion is adopted, and according to the rapid combustion layer, the low ignition point of low-temperature biomass charcoal residue powder is utilized, ignition is rapidly responded, and the combustion rate is adjusted through assistance of the charcoal powder; the combustion layer realizes continuous high-temperature heat release by virtue of high-temperature carbon powder (high calorific value) and high-temperature biomass carbon residue powder (flame resistance); stamping combination ensures close contact of the two layers, a quick-burning layer is formed to ignite a high-temperature burning layer, and therefore burning is stable and sufficient.

The invention discloses a method for evaluating the aging performance of flame-retardant insulating oil, and relates to the technical field of performance evaluation of insulating materials of power equipment, and the method comprises the following steps: S1, sample preparation; s2, a sequential coupling aging test: sequentially performing an accelerated thermal aging test and a disruptive discharge aging test on the flame-retardant insulating oil sample; s3, performance parameter testing and characteristic rule identification: testing a flash point, a breakdown voltage, a dielectric loss factor tan delta and an acid value of the sample at different stages of the sequential coupling aging test; analyzing an evolution rule of a flash point along with thermal aging time, change characteristics of a breakdown voltage in thermal aging and breakdown discharge aging processes, and change trends of a dielectric loss factor and an acid value; and S4, comprehensive performance and service life evaluation. According to the invention, through a sequential coupling aging test, a complex working condition of a thermal-electric stress synergistic effect in the transformer is comprehensively simulated, and the limitation of a traditional single aging mode is overcome.

The utility model relates to a rapid cooling device of a closed-cup flash point detection instrument, which comprises a shell (2), more than two cooling tanks (1) are arranged at the upper part of the shell (2), a through ice injection port (3) is arranged beside the cooling tanks (1), a water outlet (4) is arranged at the bottom of the shell (2), the cooling tanks (1) are not communicated, cooling cups are arranged in the cooling tanks (1), and the water outlet (4) is arranged at the bottom of the shell (2). High-temperature oil needing to be cooled after an experiment is finished is contained in the cooling cup, an ice containing cavity (5) for containing ice is formed in the shell (2), and the cooling groove (1) is not communicated with the ice containing cavity (5). By means of the design that the cooling grooves are isolated from the ice containing cavity, the cooling cups containing the high-temperature oil are arranged in the cooling grooves, ice blocks are added into the ice containing cavity from the ice injection openings, the high-temperature oil can be rapidly cooled, the cooling grooves are not communicated with one another, mutual influence is avoided, and molten ice water can be conveniently drained through the water drainage openings.

A process for the explosion-proof storage of nitrous oxide in the liquid phase in a container comprising filling the container with nitrous oxide and an inert component selected from nitrogen, oxygen, carbon dioxide, water, argon, helium, krypton, xenon and mixtures thereof, and keeping it at a temperature of 190 to 273 K, wherein (i) the container has in all three spatial directions an inner distance between two opposite interior walls of ≥10 cm, (ii) the concentration of the inert components comprises 2 to 20 wt.-% in total, based on the nitrous oxide in the liquid phase, and (iii) compounds selected from—gases having a flammable range with air at 293.15 K and 101.3 kPa abs,—liquids having a flash point of ≤366.15 K at 101.3 kPa abs, and—mixtures thereof are kept at 0 to 2 wt.-% in total, based on the nitrous oxide in the liquid phase.

The present invention relates to the technical field of marine fuel pipelines, and more specifically, to a method for leak detection in marine low-flashpoint, toxic fuel delivery pipelines. The method comprises planning a pipeline installation path, welding an inner pipe in sections, sealing and welding an outer pipe to the outside of the inner pipe, filling the space between the inner and outer pipes with nitrogen, installing a pressure sensor in the outer pipe, installing an inflation valve and an air release valve on the pipe walls at both ends of the outer pipe, providing a liquid reservoir at a low position along the installation direction of the outer pipe body, installing a liquid level sensor and a first gas sensor in the reservoir, and installing a second gas sensor in the pipe below the air release valve. When the pressure sensor detects a pressure drop, a controller issues a fault signal, halting fuel delivery, and determining the leakage status of the inner and outer pipes based on the detection results of the liquid level sensor, the first sensor, and the second sensor. The present invention provides a method for leak detection in double-walled pipes that is simple in structure, does not require the installation of an air duct, and can be used to detect leaks in the inner and outer pipes.

The invention belongs to the technical field of mixed explosive preparation, relates to a preparation method of special coal-based synthetic oil for mixed explosives, and belongs to the technical field of coal-based liquid fuel and explosive auxiliary materials. According to the method, the coal-based synthetic oil with proper viscosity, high flash point, good low-temperature fluidity, excellent oxidation stability and good compatibility with ammonium nitrate is prepared through specific coal liquefaction, hydrofining, isomerization and component blending processes. The product can safely and efficiently replace traditional diesel oil to be applied to on-site mixed loading explosives, has the characteristics of controllable performance, controllable cost and high adaptability, and can effectively solve the problems of property fluctuation, potential safety hazards, poor environmental adaptability and the like when the traditional diesel oil is used as a fuel phase of the mixed loading explosives.

The application discloses a high-flash-point diluent dispersing device and a dispersing method thereof, which comprises a liquid inlet, a fixing ring, a supporting frame, a hose, a hard pipe, a discharge pipe and a spherical pipe. The high-flash-point diluent is uniformly mixed and dispersed through multiple modes in a coordinated and synchronous manner, the dispersing effect is improved, the diluent is transported in an uninterrupted flow mode, and the dispersing operation is performed in the process, so that the overall efficiency is improved. The dispersing modes include spreading flow, spraying, pushing and pulling and stirring, and each mode is realized through a diluent flow matching device structure, without the need of adding various equipment.

The invention relates to the technical field of detection, and discloses a purity detection device for lubricating oil production, which comprises a detection mechanism, the detection mechanism comprises a support frame, the outer wall of the support frame is fixedly connected with support legs, and the top of the support frame is fixedly connected with a glass tube. A first connecting block is fixedly connected to the end, away from the supporting frame, of the glass tube, a liquid inlet tube is fixedly connected to the top of the first connecting block, and a second fixing rod is fixedly connected to the top of the first connecting block. Different areas and depths in the lubricating oil storage device can be sampled through the sampling mechanism, so that errors of a detection result caused by a single sampling point are avoided, and meanwhile, when the purity of the lubricating oil is detected, a viscosity detector, a flash point tester and a detection light source are used for detecting the appearance of the lubricating oil in a glass tube. Therefore, the accuracy of lubricating oil purity detection results is improved.

The invention provides a real-time closed-cup flash point prediction method based on a trace distillation range measuring device, and relates to the technical field of distillation ranges and flash point tests.The method comprises the following steps that a preorder distillation range temperature set is obtained in real time, and the preorder distillation range temperature set comprises initial steam temperatures corresponding to a plurality of preset recovery volume percentage nodes; the steam pressure and the liquid temperature are obtained in real time to obtain the steam pressure change rate and the liquid temperature change gradient, and then the heat capacity disturbance factor of the device is calculated; correcting each initial steam temperature in the preorder distillation range temperature group in real time by using a heat capacity disturbance factor to obtain a corresponding first corrected steam temperature; and calculating and predicting the closed-cup flash point through linear weighting calculation of each first corrected steam temperature based on a weight distribution relation pre-established by the test steam temperature of the preset recovery volume percentage node and the linear correlation characteristic of the closed-cup flash point. According to the method, the closed-cup flash point is predicted while the distillation range is measured, and time and samples are remarkably saved.

The invention relates to a preparation method of a multifunctional microcapsule for targeted flame retardance and repair of insulating oil, an insulating liquid is mixed oil of mineral oil and palm oil-based modified natural ester, and the inherent high flash point characteristic of the modified natural ester improves the fireproof safety of the insulating oil. A multifunctional microcapsule containing a repairing agent and a flame retardant is added into insulating oil, and a shell structure of the microcapsule contains TiO2, so that the microcapsule has the capability of targeted induction of an electric field. When the insulating oil has an arc fault, a high electric field can be generated at the fault position, under the action of the high electric field and the high temperature, the microcapsule directionally migrates to the fault position and cracks, the flame retardant and the repairing material are released, the flame retardant is heated to decompose and absorb heat, the fault temperature is reduced, and meanwhile the repairing agent can repair structural defects caused by arc discharge. The modified insulating oil prepared by the invention has high flame retardance and a targeted repair function, and the service life of the insulating oil is prolonged.

The invention discloses a low-flash-point PMMA liquid resin safe glue mixing method and equipment based on inert gas protection, and relates to the technical field of low-flash-point resin glue mixing. The proportion of the inert gas in the air is increased, so that the flash point temperature of the low-flash-point substance can be improved, and the safety in the glue mixing and filling process is ensured. Aiming at the combustion risk existing in the low-flash-point PMMA liquid resin mixing and pouring process, the glue mixing equipment can effectively improve the flash point temperature of resin by increasing the content of inert gas in air in the glue mixing cavity and reducing the oxygen concentration; the equipment is provided with a real-time oxygen concentration detector to monitor the oxygen content in the glue mixing cavity, inert gas is supplemented in real time, and the specific oxygen concentration is maintained. The glue mixing equipment can control the combustion risk in the glue mixing and pouring process of the low-flash-point PMMA liquid resin from the source, has the advantages of low cost, easiness in operation and the like, and is suitable for glue mixing and pouring operation in the field of large-scale composite materials such as wind power blades, ships, airplanes and the like.

The invention relates to a dry cleaning medium and application thereof, the dry cleaning medium comprises an alcohol ether compound and water, the flash point of the dry cleaning medium is 300 DEG C or above, and the ignition point of the dry cleaning medium is 1000 DEG C or above. The dry cleaning medium provided by the invention is relatively high in flash point and ignition point, has the advantage of flame retardancy, is safe and risk-free, does not cause fabric shrinkage when being used for cleaning easily-shrunk fabrics, has an excellent stain removal rate, and has an excellent removal effect on both oil-soluble stains and water-soluble stains.

The invention discloses a safety performance evaluation method for a cooling liquid. The method comprises the following steps: measuring the flash point temperature and the ignition point temperature of the cooling liquid; respectively adjusting the measured flash point temperature and ignition point temperature of the cooling liquid to temperatures under standard atmospheric pressure to obtain a cooling liquid standard flash point temperature and a cooling liquid standard ignition point temperature corresponding to the cooling liquid; obtaining a mixture of the cooling liquid and the electrolyte; the flash point temperature and the ignition point temperature of the mixture are measured, the measured flash point temperature and the measured ignition point temperature of the mixture are adjusted to the temperature under the standard atmospheric pressure, and the mixture standard flash point temperature and the mixture standard ignition point temperature corresponding to the mixture are obtained; and evaluating the influence of electrolyte leakage on the safety performance of the cooling liquid based on the standard flash point temperature of the cooling liquid, the standard ignition point temperature of the cooling liquid, the standard flash point temperature of the mixture and the standard ignition point temperature of the mixture. According to the safety performance evaluation scheme of the cooling liquid, the influence of electrolyte leakage on the safety performance of the cooling liquid can be accurately evaluated, and an important technical support is provided for design and operation of an energy storage system.

The invention relates to the field of electrochemical energy storage devices, and discloses an electrolyte of a flame-retardant high-power electric double-layer capacitor suitable for an energy storage scene and an electric double-layer capacitor containing the electrolyte, and the electrolyte comprises a liquid-phase flame retardant, a gas-phase flame retardant, a diluent and an optional additive besides a solvent and an electrolyte salt which form the electrolyte; wherein the liquid-phase flame retardant is a macromolecular fluorinated siloxane compound with a silicon-oxygen six-membered ring or eight-membered ring as a skeleton; the gas phase flame retardant is a halogenated phosphazene alkane compound; the diluent is a fluorinated ether diluent; and the additive is a silazane additive. According to the electrolyte, through collaborative design of a gas-liquid two-phase flame-retardant system, the potential safety hazards that an existing acetonitrile-based electrolyte is low in flash point and prone to jetting combustion due to thermal runaway are greatly solved, high safety, long service life and high energy density are guaranteed, and meanwhile the economical efficiency of large-scale mass production and process feasibility are achieved; the method is especially suitable for large-scale energy storage scenes with strict safety requirements.

This invention provides a high-calorific-value, high-flash-point bio-liquid fuel and its preparation method, comprising the following raw materials: bio-based butanol, ethylene glycol, dimethyl carbonate, butanone, cyclohexylamine carbonate, and methyl acetate, in the following mass percentage proportions: bio-based butanol 60-75%, ethylene glycol 5-10%, dimethyl carbonate 15-20%, butanone 0.5-1.0%, cyclohexylamine carbonate 2.0%-6.0%, and methyl acetate 5-10%. The high-calorific-value, high-flash-point bio-liquid fuel and its preparation method provided by this invention have the characteristics of high calorific value, high flash point, high freezing point, stable flame combustion, clean and smokeless operation, and high safety in storage tank transportation and use.