366 results about "Mixed fuel" patented technology

The invention provides a simplified modeling method and device for a complex mixed fuel combustion reaction kinetic model and a computer program product. The simplified modeling method comprises the steps of model coupling, primary model simplification by adopting a directed relation graph method based on error transfer and a species sensitivity analysis method, and optimization of the primary simplified model by taking an optimal pre-exponential factor, a temperature index and activation energy of a three-parameter modified Arranius equation as optimization objects. And the optimization model is simplified again. According to the method, a method of directly simplifying a complex model is adopted, and the model does not need to be manually disassembled and constructed; the method does not need deep reaction path analysis, does not need programming, is suitable for combustion simulation engineering practitioners without the basis of combustion reaction kinetics research, and is used for rapidly making a fuel mechanism model and carrying out reasonable verification.

Systems and methods for injecting hydrogen into a natural gas pipeline to lower the carbon intensity of the resulting fuel blend while achieving the required energy output thereof for the end user. In one embodiment a blend ratio for the blended fuel comprising hydrogen and natural gas is determined based at least in part on a minimum energy output for fuel combusted at an end-use location connected to the natural gas pipeline so that the blended fuel (i) has a lower carbon intensity than a natural gas stream flowing in the natural gas pipeline, and (ii) provides at least the minimum energy output when combusted at the end-use location. Further, one or more embodiments include adjusting a control valve of a hydrogen injection assembly connected to the natural gas pipeline upstream of the end-use location based at least in part on the blend ratio to thereby mix hydrogen into the natural gas pipeline and produce the blended fuel.

The application provides a simplified modeling method, device and computer program product of a complex mixed fuel combustion reaction kinetics model. The simplified modeling method comprises the following steps: model coupling, one-time simplification of the model by using an error transmission-based directed relationship diagram method and a species sensitivity analysis method, optimization of the one-time simplified model by taking the optimal pre-exponential factor, temperature index and activation energy of the three-parameter modified Arrhenius equation as optimization objects, and re-simplification of the optimized model. The application adopts a method for directly simplifying a complex model, does not need to artificially disassemble and construct the model, does not need to perform in-depth reaction path analysis, does not need to perform program writing, is suitable for combustion simulation engineering practitioners without a combustion reaction kinetics research foundation, is used to quickly produce a fuel mechanism model, and is reasonably verified.

The invention discloses an amino mixed fuel explosion characteristic visualization and explosion suppression coordinated regulation and control system and method, and the system comprises an explosion suppression device which is disposed in a combustion chamber and is in communication connection with a holographic monitoring device and an explosion overpressure real-time prediction model. A graded explosion suppression scheme is set according to the safety early warning grade, so that active intervention of explosion suppression intensity and mode matched with combustion or explosion development stages with different intensities in the combustion cavity is implemented. Therefore, visualization of the mixed gas combustion and explosion dynamic process under the multi-parameter coupling condition can be achieved, and the comprehensiveness and reliability of combustion and explosion research are remarkably improved; through real-time monitoring and intelligent prediction of the explosion process, the explosion process in the device can be rapidly started, the explosion suppression response can be optimized, the explosion development can be suppressed, the integrity and operation safety of an experiment system can be guaranteed, and the intrinsic safety and the system protection capability of the experiment process can be effectively enhanced.

The invention relates to the field of fuel injection systems of internal combustion engines, in particular to a liquid ammonia-hydrogen dual-fuel premixing direct injection combustion chamber which comprises a pre-combustion chamber, an injection end of the pre-combustion chamber is mounted in the combustion chamber, and a spark plug and a mixed fuel injection structure are mounted on the pre-combustion chamber. The inlet end of the mixed fuel injection structure is communicated with a liquid ammonia and hydrogen mixing structure, a hydrogen inlet is formed in the side wall of the liquid ammonia and hydrogen mixing structure, the inlet end of the liquid ammonia and hydrogen mixing structure is communicated with a liquid ammonia injection structure, an ammonia inlet is formed in the side wall of the liquid ammonia injection structure, and a valve structure is arranged in the liquid ammonia injection structure. The problems of fuel injection and ignition in the ammonia-hydrogen fusion engine are solved.

The invention discloses high-density fuel oil and a preparation method thereof. Comprising the following steps: carrying out alkylation reaction on medium and low temperature coal tar fractions, cyclohexane, a catalyst and a modifier to obtain alkylated modified coal tar; and hydrofining the alkylated modified coal tar to obtain the high-density fuel oil. Through alkylation modification reaction of medium and low temperature coal tar fractions, the problem of ring growth when coal tar is used as a raw material to synthesize high-density fuel is solved. The preparation method is simple in step, alkylation reaction raw materials are easy to obtain, and the physical and chemical properties of the prepared coal-based mixed fuel are superior to those of a high-density fuel prepared from a single compound. The density value of the high-density fuel oil is larger than 1.092 g / mL, the heat value is larger than 42.8 MJ / L, and the high-density fuel oil can meet the requirement for development of high-performance aircrafts.

The utility model discloses a special fuel oil and air mixing structure for a burner, which relates to the field of burner accessories and comprises an air inlet bin, two ends of the air inlet bin are respectively connected with an air inlet and a transmission bin, the outer side of the transmission bin is connected with a mixing bin and an air outlet, and a motor is mounted in the transmission bin. The output end of the motor is connected with air inlet fan blades and diffusion fan blades, the air inlet fan blades are located in the air inlet bin, the diffusion fan blades are located in the mixing bin, an oil inlet pipe is installed on the outer side of the mixing bin and extends into the mixing bin to be aligned with the diffusion fan blades, and a fixing steel ring is installed on the inner wall of the mixing bin. By means of the sealing plate and the fixing steel ring, when the combustor is not used any more, the sealing plate is pulled by the return spring to be tightly attached to the fixing steel ring, and the edge of the sealing plate is sealed through the inclined sleeve, so that mixed fuel in the mixing bin cannot be discharged from the transmission bin, and fuel leakage is reduced.

An ammonia mixed combustion engine 1 that operates by burning ammonia and a hydrocarbon liquid fuel causes a control unit 2 to implement at least one of decrease or increase in an air excess ratio in fuel, advance or retard in injection timing of the liquid fuel, and decrease or increase in injection pressure of the liquid fuel in accordance with increase or decrease in a mixed fuel burning ratio of ammonia in the fuel.

The invention discloses an intelligent prediction method and system for the alkali metal slagging tendency of a biomass gas coupled coal-fired boiler, and relates to the field of slagging tendency prediction.The intelligent prediction method comprises the steps that flue gas temperature data of a target area of a convection heating surface of the boiler is obtained, and the ash content melting characteristic temperature and alkali metal element content data of mixed fuel entering the boiler are obtained; performing physically constrained ash temperature-liquid phase yield adaptive correlation calculation, calculating coupling adhesion force, generating equivalent adhesion strength distribution of particle surfaces, counting particle turbulence collision physical parameters based on the equivalent adhesion strength distribution of the particle surfaces, and judging effective collision adhesion efficiency based on energy competition. The method comprises the following steps: calculating the agglomeration growth rate of ash particles in a flow field, outputting the spatial growth configuration of ash particle aggregates, carrying out macroscopic mechanical characteristic analysis and bridging stability judgment on an accumulation body at the throat part of the dry bottom hopper according to the spatial growth configuration of the ash particle aggregates, and outputting the blockage risk level of the dry bottom hopper, thereby effectively solving the blockage problem of the dry bottom hopper.

The invention discloses an ammonia-coal mixed combustion burner, comprising: a plasma coal powder pre-combustion stage module, an ammonia two-stage combustion module, a coal powder main combustion stage module, and an air-graded secondary air module; in the plasma coal powder pre-combustion stage module, discharge is performed between electrodes to generate plasma, coal powder carried by primary air passes through a plasma fire core region to burn and generate a first coal powder flame, the first coal powder flame ignites ammonia fuel in the upstream of the ammonia two-stage combustion module to generate a stable ammonia-rich flame, combustion products and unburned reactants are mixed with air in the downstream of the ammonia two-stage combustion module to generate an ammonia-poor flame to heat the coal powder in the coal powder main combustion stage module to generate a second coal powder flame, and in the air-graded secondary air module, the secondary air is used to promote the full combustion of coal powder and ammonia, thereby realizing the stable combustion of the ammonia-coal mixed fuel, and effectively solving the problems of unstable combustion of ammonia coal and NO x Problems with excessive emissions and ammonia slip.

An injection device for injecting a combined water / gaseous fuel mixture into a combustion space of an engine. The injection device comprises: a first inlet for receiving a supply of water into a water chamber; a second inlet for receiving a supply of gaseous fuel into a flow passage; a mixing device comprising a valve assembly which is configured to control the flow of water between the water chamber and the flow passage so as to establish a combined gaseous fuel / water mixture within the flow passage; and an injection nozzle including a valve needle which is operable to control the delivery of the combined gaseous fuel / water mixture from the flow passage into the combustion space. The disclosure also extends to a fuel injection system.

The present technology relates to biofuels, and more particularly, to biomass-based diesel from olefin oligomers. Diesel fuels with cetane number of 49 or greater are prepared by blending hydrocarbons produced by olefin oligomerization with renewable diesel, resulting in a blended fuel that has a lower cloud point than the cloud point of the renewable diesel. A different aspect relates to an integrated process for lipid HDO and olefin oligomerization wherein the propane coproduct of lipid HDO is subjected to dehydrogenation to produce a vapor stream having propylene and hydrogen. The propylene is subsequently oligomerized to iso-olefins and the iso-olefins are combined with the lipid feed for hydrogenation in the HDO reactor.

The method for roasting the beryllium-containing material by adopting the mixed fuel comprises the following steps: I, mixing a beryllium-containing raw material with biomass to obtain a beryllium-containing mixture; and II, roasting the beryllium-containing mixture by adopting a mixed combustible gas comprising hydrogen and a combustion-supporting gas to obtain a roasted product. According to the method for roasting the beryllium-containing material by adopting the mixed fuel, the beryllium-containing material is roasted by utilizing the hydrogen and the combustion-supporting gas, so that the carbon emission is reduced. And meanwhile, in the decomposition process of the beryllium-containing material, C in biomass and generated CO are used for reducing BeO at a high temperature, so that part of elemental beryllium is generated in a roasted product, the efficiency of the subsequent elemental beryllium preparation process is improved, and the technological process is shortened.

The invention discloses a catalytic porous medium clean combustion reactor for hydrogen-ammonia blended fuel, and relates to the technical field of reactors. The reactor comprises a reactor body, wherein a filtering assembly and a crushing assembly are mounted at the top of the reactor body; a combustion chamber is arranged in the reactor body, a ceramic porous plate is arranged on the combustion chamber, and an air inlet pipe, an air outlet pipe and a catalysis pipe are arranged on one side of the reactor body. A composite crushing structure of primary crushing of the crushing rods and secondary impact of the elastic crushing rods is adopted, and the crushing efficiency is improved by 40% or above compared with a traditional rigid structure; a conical filter screen of the filter assembly is matched with a clamping piece rapid dismounting and mounting mechanism, the screening efficiency is improved by 30%, shutdown is not needed in the impurity recycling process, retention materials can be collected by connecting lead screws between an annular shielding plate of a sliding shielding piece and an upper barrel body and a lower barrel body of a rotary fixing barrel, and the manual maintenance cost is reduced.

The invention provides a cold-state boiler starting combustion control method for a sludge and solid waste collaborative incineration boiler. Whether the feeding rate of ignition fuel, auxiliary solid waste fuel and sludge meets the requirement for safe operation of the boiler or not can be rapidly judged. The method comprises the following steps: 1, obtaining the length, width and height sizes of a hearth and the maximum heating rate of the castable; calculating the total heat exchange area and the total volume of the hearth, the total energy of ignition fuel fed into the hearth during combustion, the temperature rise value of air in the hearth after the ignition fuel is combusted, and the temperature rise value of the castable in unit time; comparing the temperature rise value of the castable in unit time with the maximum temperature rise rate of the castable; 2, calculating smoke components in the hearth when the auxiliary solid waste fuel and the sludge are added, the total energy of mixed fuel fed into the hearth during combustion, the temperature rise value of smoke in the hearth space after the mixed fuel is combusted, and the temperature rise value of the castable in unit time under the condition that the mixed fuel is added; and comparing the temperature rise value of the castable in unit time with the maximum temperature rise rate of the castable.

The invention provides a technical method for using natural gas and hydrogen mixed fuel for aluminum electrolysis anode roasting and a mixer, and belongs to the technical field of anode roasting. The invention relates to the technical field of natural gas mixing. According to the method, hydrogen in a certain proportion is mixed into natural gas through the mixer, the mixed gas serves as fuel to roast the aluminum electrolysis anode green block, the production process requirement is met, and the curve is matched with an original roasting temperature rise curve. According to the method, carbon emission in the production process can be reduced, climate changes can be coped, the combustion efficiency of natural gas can be improved, and energy waste in the production process is reduced. And the compression strength and the specific resistance of the aluminum electrolysis prebaked anode prepared from the fuel are equivalent to those of an aluminum electrolysis prebaked anode obtained by calcining natural gas.

The present invention discloses a combined quality improvement method for a flue gas modified wheat straw and lignite mixed fuel, comprising the following steps: uniformly mixing wheat straw powder and lignite powder to obtain a mixture, drying the mixture at 200-270°C for 25-30 minutes in a flue gas atmosphere, and cooling to room temperature to obtain a flue gas modified wheat straw and lignite mixed fuel. The fuel quality and physical properties of the flue gas modified wheat straw and lignite mixed fuel are improved. The combined quality improvement method can compensate for the loss of combustible components during the drying process, enhance the hydrophobicity of the flue gas modified wheat straw and lignite mixed fuel while improving the quality of the combined quality improved fuel, effectively improve the combined utilization value of lignite and wheat straw, significantly reduce the emission of NOx from the combustion product, and reduce pollution, effectively improve the utilization value of wheat straw and lignite, and achieve efficient energy saving and carbon reduction at the production capacity end.

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 application discloses a kind of layer board type ammonia-hydrogen mixed fuel nozzle, the nozzle includes bottom platform, cover and flow guide column, the fixed end and ammonia fuel import end of the flow guide column, the fixed end of the flow guide column is fixedly connected with cover, and the ammonia fuel import end of the flow guide column extends outward and penetrates bottom platform;The middle part of the flow guide column is provided with a plurality of ammonia fuel outlets;Flow guide column between bottom platform and cover is provided with by a plurality of first flow guide plate and second flow guide plate alternately arranged and formed layer board stack;The bottom platform is also provided with a plurality of hydrogen fuel inlet channels.The layer board type ammonia-hydrogen mixed fuel nozzle of the application is formed by layer board stack etched with multiple flow channels, and the function of directly injecting and mixing ammonia and hydrogen two fuels without mixing container can be realized.

The invention relates to the technical field of combustion heaters, and particularly discloses a methane mixed ammonia combustion warm air heater which comprises a combustion chamber, a combustor body is arranged in the combustion chamber, and a porous medium is arranged at the downstream of the combustor body; a fuel fluid center channel is formed in the center of the burner body, a first-stage axial channel, a second-stage axial channel, a plurality of jet flow holes and a third-stage radial channel are formed in the burner body, and a first-stage axial rotational flow channel is formed in the first-stage axial channel through first-stage blades. A second-stage axial rotational flow channel is formed in the second-stage axial channel through second-stage blades, and a third-stage radial rotational flow channel is formed in the third-stage radial channel through third-stage blades; through the combined design of the burner body and the porous medium, mixed fuel of methane and ammonia gas can be fully mixed, then stable on-duty flames are formed in the porous medium, cold air can be heated, carbon emission of cold start of a boiler is reduced, and the purpose of reducing carbon is achieved.

The invention discloses a fuel detergent, a preparation method thereof and a mixed fuel. The fuel clearing agent comprises a clearing agent main agent and an optional auxiliary agent, and the clearing agent main agent comprises a pentene amine compound, polyether amine and a phenylacetone compound. The pentene amine compound, the polyether amine and the phenylacetone compound are combined, the pentene amine compound, the polyether amine and the phenylacetone compound are mixed for use to generate a synergistic effect, the cleaning effect of the fuel detergent can be remarkably improved, the polyether amine provides good dispersity and solubility, the phenylacetone compound can be fully dispersed in fuel, and the cleaning effect of the fuel detergent is improved. The ketone group of the phenylacetone compound can further enhance the removal capability of polyether amine to specific pollutants and improve the cleanliness of the fuel, and the pentene amine compound is combined, so that the combustion efficiency can be further improved and the emission of harmful gas can be further reduced.

The invention relates to the technical field of integrated energy system dispatching, in particular to an integrated energy system low-carbon dispatching method considering fuel gas hydrogen mixing and carbon transaction, which comprises the following steps of: constructing an integrated energy system model containing electric power, thermal power, natural gas and coupling equipment, and defining an electric hydrogen production process and an electric methane production process of power-to-gas equipment by the coupling equipment model; a fuel gas mixed hydrogen energy flow calculation model is constructed, a decomposition solution method is adopted for iterative convergence and dynamic calculation of a mixed fuel gas real-time heat value, and energy balance constraints are improved; constructing an optimal scheduling model considering the stepped carbon transaction, and taking the minimization of the total operation cost as a target; and applying hydrogen mixing proportion upper limit constraint, and cooperatively deciding power distribution and a hydrogen storage tank charging and discharging strategy through an optimization algorithm to solve a target function. According to the method, the energy flow calculation precision and the renewable energy consumption capability are improved, and collaborative optimization of system economy and environmental protection benefits is realized.

The invention provides a ship ammonia gas mixed fuel and a safe release device thereof, the ship ammonia gas mixed fuel comprises a first adjusting mechanism and a second adjusting mechanism, the first adjusting mechanism is mounted in a cabin, and a storage mechanism for storing ammonia gas and a combustion improver is mounted in the cabin; the top end of the cabin is provided with an air inlet mechanism used for increasing the internal ventilation of the cabin and supplying fuel oxygen, and the air inlet mechanism is communicated with a mixing mechanism used for mixing fuel gas and air; a pressure relief mechanism used for exhausting is installed at the bottom end of the cabin, and the pressure relief mechanism communicates with the rotary drum and the second communicating pipe. The ship ammonia gas mixed fuel and the safe release device thereof have the advantages that the fuel concentration is reduced, fire is prevented, and the fuel is rapidly discharged from the interior of a ship body.

The invention belongs to the technical field of metallurgical engineering, and discloses a metallurgical reaction device and a metallurgical method.The metallurgical reaction device comprises a material preparation mechanism and a blowing mechanism. The material preparation mechanism is used for mixing the first solid fuel and the second solid fuel according to a preset proportion to prepare mixed fuel; the blowing mechanism comprises a tuyere small sleeve, an air supply piece and a spray gun, the tuyere small sleeve is provided with a first flow channel, the first flow channel is communicated with an inner cavity of the furnace body, the air supply piece is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and part of the spray gun is obliquely inserted into the air supply piece and the tuyere small sleeve; comprising a hydrogen-rich fuel injection pipe, a combustion-supporting gas injection pipe and a solid fuel injection pipe which are sequentially and coaxially arranged from inside to outside so as to inject hydrogen-rich fuel, combustion-supporting gas and mixed fuel into the first flow channel. The metallurgical reaction device can realize collaborative combustion of various fuels, effectively improve the combustion efficiency, improve the fluidity of slag, reduce the viscosity of the slag, and facilitate normal operation of a blast furnace and improvement of the quality of molten iron.

Whether the co-firing ratio is low or high, interlock control is appropriately implemented when the co-firing ratio fluctuates due to the influence of external disturbances. [Solution] This application relates to a gas turbine control device for controlling a gas turbine equipped with a fuel supply system that supplies a first mixed fuel of a first fuel and a second fuel to a first fuel nozzle. The gas turbine control device determines whether or not interlock control of the gas turbine is necessary by comparing the deviation between a target mixing ratio, which is a target value for the mixing ratio of the second fuel in the first mixed fuel, and the mixing ratio of the second fuel in the first mixed fuel, with a reference value. The reference value for determining whether interlock control is necessary differs between the first mixing ratio region, where the combustibility index of the first mixed fuel decreases with increasing mixing ratio, and the second mixing ratio region, where the combustibility index of the first mixed fuel increases with increasing mixing ratio.

The utility model relates to the technical field of cement production, and provides an ammonia-coal mixed fuel cement clinker calcining system which comprises a rotary kiln, a smoke chamber and a decomposing furnace which are sequentially connected. A sufficient combustion area and an ammonia gas pre-decomposition-NOx reduction area are formed in the decomposition furnace, and the sufficient combustion area is located at the downstream of the ammonia gas pre-decomposition-NOx reduction area; the rotary kiln and the ammonia gas predecomposition-NOx reduction area are both connected with an ammonia-coal mixture feeding module used for introducing ammonia gas, pulverized coal and a primary air mixture, the rotary kiln is provided with a secondary air inlet, and the sufficient combustion area is provided with a pulverized coal inlet and a tertiary air inlet. According to the system for calcining the cement clinker by using the ammonia-coal mixed fuel, the ammonia and the coal powder are mixed for use, so that the use of fossil fuel can be reduced, the emission of greenhouse gas CO2 in the calcining process of the cement clinker is reduced, the cost is lower, and meanwhile, the problem that a large amount of NOx is generated by combustion of the ammonia gas is solved.

The invention discloses a garbage incinerator combustion regulation and control system based on sludge atomization spraying and a regulation and control method, and belongs to the technical field of garbage combustion treatment. The regulation and control system comprises a garbage incinerator, a combustion monitoring unit, a dry sludge storage bin, a wet sludge storage bin, a sludge drying unit, a calculation control unit, a dry sludge feeding control unit and a wet sludge feeding control unit. The regulation and control method comprises the steps that the garbage incinerator is started; starting a combustion monitoring unit and a calculation control unit; the dry sludge is uniformly sprayed on a garbage bed layer through the dry sludge feeding control unit, and the overall regulation and control of combustion are realized from a fuel end; the wet sludge is accurately sprayed to an overtemperature area through a wet sludge feeding control unit, and the local temperature is reduced through heat absorption in the evaporation process; and the system automatically realizes closed-loop feedback and dynamic optimization. According to the method, the dual purposes of mixed fuel combustion stability and hearth local temperature field optimization control are achieved, and efficient and stable operation of the incineration process is effectively guaranteed.

The invention discloses a mixed fuel explosion limit rapid prediction and visual platform construction method, and relates to the technical field of explosion limit prediction modeling, and the method comprises the steps: obtaining a multi-source sample data set which comprises the explosion state labels of a plurality of mixed fuels under the conditions of different temperatures, pressures, equivalence ratios and diluent gases; based on the multi-source sample data set, performing training and hyper-parameter optimization on at least one machine learning classification model to obtain a trained explosion limit prediction model; obtaining state parameters of to-be-predicted mixed fuel input by a user through the constructed visual interaction platform, and calling the trained explosion limit prediction model to process the state parameters through the visual interaction platform to obtain an explosiveness prediction result; and carrying out fusion display on the explosiveness prediction result and an explosion limit distribution diagram generated based on the multi-source sample data set on a visual interaction platform. According to the invention, the efficiency and accuracy of mixed fuel explosion limit prediction are obviously improved.

The invention discloses a fuel supply device and a mixed fuel engine test bench, the fuel supply device comprises a raw material supply module, a fuel mixing module, a first conveying pipeline, a second conveying pipeline and a third conveying pipeline, the raw material supply module comprises a first fuel module and a second fuel module; the fuel mixing module comprises a mixed fuel storage tank and a weighing device, the weighing device is used for obtaining the mass change of the mixed fuel storage tank, the first conveying pipeline is connected between the first fuel module and the mixed fuel storage tank, and the second conveying pipeline is connected between the second fuel module and the mixed fuel storage tank. According to the invention, the weighing device is used for weighing the mixed fuel storage tank, so that the mixed fuel with an accurate proportion can be obtained in a test room, the waiting time cost in the test process is reduced, and the test efficiency is improved. The problem that the transportation cost and the transportation risk of the mixed fuel needed by the test are high is solved.

The present invention discloses a mixed fuel burner, comprising an outer tube, a preheating tube, and a fuel delivery tube. One end of the preheating tube is connected to a fuel supply device; a fan is provided at one end of the outer tube, and a tail nozzle is provided at the other end of the outer tube; a multi-stage catalytic injection device is provided in the center of the outer tube; a catalyst chamber is provided in the tail nozzle, and the other end of the preheating tube is connected to the catalyst chamber; one end of the fuel delivery tube is connected to the catalyst chamber; the multi-stage catalytic injection device includes several stages of catalytic injection components, each of which is provided with a catalyst cavity, a central heat storage body is provided in the catalyst cavity; a second catalyst is installed in the catalyst cavity; an annular gap is formed between the side of the central heat storage body and the inner wall of the catalyst cavity; a supporting connecting tube is provided between two adjacent stages of the catalytic injection components; and a thermal catalytic cover is provided around the supporting connecting tube between the two adjacent stages of the catalytic injection components. The present invention can promote the vaporization and cracking of the mixed fuel, improve the combustion efficiency of the mixed fuel, and save the use of the mixed fuel.