20 results about "Particle combustion" patented technology

A method for evaluating the combustion performance of fuel in sintered quasi-particles is disclosed, relating to the field of iron and steel metallurgy. This method involves sampling and sieving the fuel of the type to be evaluated, preparing different types of quasi-particles based on particle size, and conducting quasi-particle combustion experiments. The experimental data are weighted and averaged based on the fuel particle size distribution to obtain efficiency values ​​for different combustion performances of the fuel. The fuel combustion performance is then evaluated based on these efficiency values. Since different particle sizes of fuel will form different types of quasi-particles during the secondary mixing process, different types of quasi-particles are designed according to the fuel particle size during preparation. Various indicators of the fuel within the quasi-particles are analyzed, which can simultaneously simulate the actual combustion environment of sintered quasi-particles and differentiate the combustion performance of different types of fuel. This is of great significance for reducing sintering costs and minimizing the combustion of sintered solids.

The invention discloses a wood chip particle combustion device, which relates to the technical field of particle combustion, and comprises a large hearth, and a high-temperature fuel gas outlet, a primary blower nozzle, a large furnace door, an ash cleaning channel and a wood chip particle inlet which are arranged on the large hearth, a secondary air self-suction adjustable inlet, a fire grate mounted on the primary blower nozzle and a refractory brick small hearth mounted on the fire grate are arranged on an ash cleaning door of the ash cleaning channel; the sawdust particle combustion device further comprises a protection device mounted on the large hearth; the protection device comprises a fixing plate, a fixing rod installed between the fixing plate and the large hearth and a protection plate installed on the fixing rod in a sliding mode, the protection plate is moved and unfolded by a safe distance, it is ensured that the outer wall of the large hearth can conduct normal heat dissipation during operation, and the situation that the protection plate is too close to cause heat accumulation is avoided; and meanwhile, the protection plate can effectively protect the large hearth, and damage to the large hearth caused by accidental collision between external objects and the large hearth is prevented.

The invention relates to a boron-containing composite particle and a preparation method thereof. The boron-containing composite particle comprises hydrofluorinated amorphous boron, fluororubber and an oxidizing agent, according to the hydrofluorinated amorphous boron, amorphous boron is activated by adopting a hydrofluorination process; the boron-containing composite particles are prepared from the following raw materials in parts by weight: 100 parts of hydrofluorinated amorphous boron, 10-55 parts of an oxidizing agent and 3-8 parts of fluororubber, and fluorine and hydrogen are adsorbed on the surface of the hydrofluorinated amorphous boron by amorphous boron through a hydrofluorination process. It is determined through experiments that the explosion reaction complete rate of boron in the boron-containing composite particles reaches 80% or above, the combustion heat of the boron-containing composite particles is remarkably improved, and the combustion heat is not lower than 30 MJ / kg; and the boron-containing composite particles have the advantage of low sensitivity, and the mechanical sensitivity of the boron-containing composite particles is lower than 40%.

The utility model relates to the technical field of plastic particle experiment devices, in particular to a dust-removal plastic particle combustion test device which comprises a test box, an impurity groove is formed in the lower side of the inner wall of the test box, a waste frame is in sliding fit with the inner wall of the impurity groove, and a cleaning frame is in sliding fit with the inner wall of the test box. Through the arrangement of the cleaning frame, the scraping frame, the arc-shaped guide groove, the stress rod, the waste frame and other components, the interior of the cleaning frame can drive incineration residues to be discharged by pulling the cleaning frame outwards, and the stress rod moves in the arc-shaped guide groove, so that the scraping frame scrapes the interior of the cleaning frame; impurities adsorbed in the arc-shaped guide groove are pushed into the waste frame, the lower sides of the cleaning frame and the scraping frame can be scraped and taken out by pulling out the waste frame, then the impurities are pushed into the cleaning frame to continue next detection, the residue taking-out speed is increased, and then the combustion efficiency of the plastic experimental particles is improved.

The utility model relates to a heating stove, in particular to an integrated heating stove, which comprises a particle combustion unit, a coal and firewood combustion unit and / or a heat exchange unit, and is different from the prior art in that a hopper module is placed on the rear side of the top surface of a stove body; most easily-damaged parts of the particle combustion unit, the coal and firewood combustion unit and / or the heat exchange unit in the furnace body can be exposed. Therefore, the maintenance convenience is obviously optimized, and the operation problem of narrow installation space is solved.

The utility model discloses a single combustible particle combustion characteristic testing device. The single combustible particle combustion characteristic testing device comprises a laser, a focusing lens, a reflecting mirror, a colorimetric measurement module, combustible particles, an ultrasonic transducer, an ultrasonic driving module and a computer, the ultrasonic driving module generates an ultrasonic control signal and drives the ultrasonic transducer to emit ultrasonic waves, the ultrasonic waves are reflected by the reflector to form standing waves, single combustible particles are suspended in the air, the laser emits pulse laser, the pulse laser is focused on the combustible particles after passing through the focusing lens, the particles are ignited, and the colorimetric measurement module measures the temperature of the combustible in real time. The single combustible particles are ultrasonically suspended, the temperature in the combustion process is measured in real time, the influence of background interference in traditional measurement can be overcome, and an experimental platform is provided for accurately analyzing the combustion process of the combustible.

The invention discloses an internal combustion engine carbon-based particle combustion energy conversion system which comprises a fuel supply unit used for conveying carbon-based particles to a transmission and distribution unit; the transmission and distribution unit is used for forming a carbon-based particle gas-solid two-phase flow with the carbon-based particles by taking oxygen or air as carrier gas and sending the carbon-based particle gas-solid two-phase flow to the injection unit; the injection unit is used for injecting the carbon-based particle gas-solid two-phase flow and ignition fuel into an air cylinder of the internal combustion engine in a time-sharing mode; the ignition unit is used for conducting graded ignition in a compression ignition or spark plug ignition mode, generated high-temperature and high-pressure gas pushes a piston to reciprocate, chemical energy is converted into heat energy in the process, then the heat energy is converted into mechanical energy, and finally the ship is driven to operate; and the control unit is used for cooperatively regulating and controlling the transmission and distribution unit and the injection unit by receiving internal combustion engine sensor data in real time so as to realize efficient combustion. The engine adopting the system can cover low-speed, medium-speed and high-speed intervals and can meet different ship power requirements.

The invention provides a test method for simulating an aluminum powder diffusion process in an aluminum-containing explosive explosion field, which comprises the following steps of: mixing inert material particles with aluminum powder particles to obtain mixed particles, and replacing original aluminum powder particles in an aluminum-containing explosive sample with the mixed particles, the sample can weaken the burning strong light of aluminum powder particles in the explosion process, so that high-speed cameras arranged in the axial direction and the radial direction of the aluminum-containing explosive sample can conveniently capture scattering and diffusion images of particle clouds in an explosion field; the dynamic distribution space of the aluminum powder can be reconstructed according to the obtained radial image and axial image, the change process of the space volume along with time is determined, key data is provided for the dynamic change of the concentration of the aluminum powder, and the technical problem that the spatial and temporal distribution and concentration evolution process of aluminum powder particles in an aluminum-containing explosive sample explosion field are lack of effective measurement means is solved. And important technical support is provided for optimal design of an aluminum-containing explosive sample formula and a charging structure.

The application discloses a kind of high-temperature turbulent flow environment particle ignition combustion test device based on cyclone stable flame, belong to combustion test field.The present application is composed of external cyclone stable flame device, central premix burner, adjustable turbulent intensity orifice plate, center powder supply tube four parts.By central premix burner to generate high-temperature high-speed methane turbulent flame, by external cyclone stable flame device to carry out stable flame to high-temperature high-speed turbulent flame, increase the turbulent intensity of flame.By high-temperature high-speed methane flame to construct high-speed turbulent field and high-temperature flue gas range, realize the combustion of aluminum particles in turbulent field, and the combustion law of aluminum particles in complex flow field is researched and tested.By changing the hole density and aperture of adjustable turbulent intensity orifice plate, the turbulent intensity of high-temperature high-speed turbulent flame is changed, by changing the gas ratio in central premix burner, the simulation of different fuel gas oxygen enrichment degree, turbulent intensity and flame temperature is realized, and the test analysis of different turbulent intensity on condensed phase particle combustion process is realized.

The utility model relates to a vertical particle combustion device applied to the technical field of combustion equipment, which realizes that a servo motor and a water-cooling flange are started through a controller, so that particles in a particle bin enter a feeding screw and are conveyed into a particle combustion chamber, and the feeding quantity can be controlled through the water-cooling flange, so that the particles are conveyed into the particle combustion chamber. At the moment, the heating element is started through the second controller for heating to burn the particles, and meanwhile the temperature can be adjusted. Meanwhile, air is pressurized by a compressor and then quantitatively enters a particle combustion chamber together with particles through a preheating system, combusted ash falls into an ash collecting device along the particle combustion chamber at the bottom, an air pump is started to extract gas and ash generated in a reaction tube, and dust precipitates are collected in the ash collecting device; gas is connected to a gas analyzer through an outlet of the sucking pump, and when combustion is stopped, the ash collecting device can be opened to take out internal ash for cleaning.

This application belongs to the field of numerical simulation technology, and relates to a numerical simulation method, apparatus, equipment, and medium for the ignition and combustion of aluminum particles. The method includes: obtaining control variables based on the aluminum particle combustion process, constructing a gas-phase control variable transport equation; considering the change in total gas-phase enthalpy, changing the temperatures on the oxidizer and fuel sides, applying a correction factor to the chemical reaction source term in the gas-phase temperature equation of a one-dimensional opposed flame, and solving the one-dimensional gas-phase opposed flame according to the gas-phase reaction mechanism to obtain a steady-state numerical solution, establishing a four-dimensional chemical reaction database; initializing the flow field, solving the gas-phase control variable transport equation to obtain the current values ​​of the control variables, interpolating and looking up tables in the four-dimensional chemical reaction database to obtain the gas-phase state parameters; when the gas-phase state parameters reach preset conditions, obtaining the thermophysical quantities of the gas phase in the combustion chamber of a solid-fuel propellant missile. This method can improve the speed of numerical simulation.

The present application relates to a kind of method for capturing and harmless treatment of organic pollutants and its precursor discharged by coal-fired.The present application uses the mechanism of high-efficiency adsorption capture of adsorbent under different temperature field conditions, high-efficiency removal and collection of fine particles including adsorbent, high-temperature combustion of collected fine particles, so that the organic pollutants and its precursor discharged by coal-fired adsorbed in adsorbent are efficiently captured and finally completely harmless treated.The present application sets up hearth adsorbent injection device and fine particle combustion device in lower part of boiler furnace respectively, sets up tail adsorbent injection device in high-temperature flue at the tail of boiler, and sets up fine particle removal device in low-temperature flue at the tail of boiler, which provides a kind of method for high-efficiency removal and harmless treatment of organic pollutants and its precursor in industrial flue gas such as coal-fired, oil-fired and waste incineration, which has high removal efficiency, complete harmless treatment, low operation cost, convenient maintenance and operation maintenance, and is suitable for high-efficiency removal and harmless treatment of organic pollutants and its precursor in industrial flue gas such as coal-fired, oil-fired and waste incineration.

The invention belongs to the technical field of resourceful and harmless treatment of retired photovoltaic modules, particularly relates to a method for carrying out all-component recovery on retired modules by adopting normal-pressure low-temperature cracking and a modular integrated system thereof, and solves a series of problems in the recovery process of the retired photovoltaic modules. And the complete set of cracking system is efficient and suitable for large-scale recovery production of large-scale photovoltaic module decommissioning. According to the technology, during combustion of the combustion furnace, particle combustion materials are designed to be ignited and combusted, a temperature control device is additionally arranged, electric stove wires are not additionally arranged, electric power is not directly used, the technology is economical, energy-saving and safe, only auxiliary equipment and illumination use electric power, no harmful substance and gas are generated in the whole process, the recovery treatment technology is reasonable, and the cost performance is extremely high. The recovery efficiency of glass and the like is more than 98.6%, and the method has huge market competition space and popularization value.

The application provides an ignition device and method for single particle of energetic material in a sealed and pressurized environment, which comprises a shell, a pressurized sealing flange and a sealing flange, the shell, the pressurized sealing flange and the sealing flange are connected to form a pressurized and sealed combustion chamber, and a heating ignition assembly is arranged in the pressurized and sealed combustion chamber; the heating ignition assembly comprises a glass slide, and fixing grooves for fixing electric heating wires are arranged on the two opposite side walls of the glass slide, the electric heating wires can be connected with a conductive column extending into the pressurized and sealed combustion chamber, and the conductive column is detachably connected with an external power source arranged outside the shell; a pneumatic quick connector is arranged on the pressurized sealing flange, and the pneumatic quick connector can be connected with a pressurizing device arranged outside the shell, the method can provide a high-temperature and high-pressure single particle combustion environment, more flexibly realize the ignition and combustion imaging of the single particle of energetic material, and effectively realize the non-interference test of single particle micro-combustion under a high-temperature and high-pressure environment.

This invention relates to the field of organic solid fuel combustion technology and discloses a method for predicting the amount of particulate matter generated during solid fuel combustion. The method involves: performing component analysis on the solid fuel; predicting the release concentration in the gas phase of the solid fuel combustion, the concentration of reduction reaction products, the particle size distribution curve of easily broken mineral particles after breakage, the particle size distribution curve of fuel particles after breakage, and the particle size distribution curve of intrinsic minerals after fuel particle combustion; generating source terms based on the predicted data; inputting the source terms into a group equilibrium model; outputting the particle size distribution curve of the particulate matter after the combustion reaction; and predicting the particulate matter emission amount based on the output particle size distribution curve. This method solves the technical problem that existing research on the generation of particulate matter from organic solid fuel combustion lacks a means to predict the generation of particulate matter from organic solid fuel combustion.

The application discloses a kind of indirect igniter starting and temperature field fast evaluation calculation method, comprising the following steps: S1: obtaining the velocity field and oil mist field distribution of indirect igniter;S2: export velocity field and oil mist field data;S3: according to the range of backflow area, the igniter is zoned;S4: determine the type of igniter, and determine the lean limit and rich limit accordingly;S5: the combustion zone is regionally discretized, and S6-S9 are executed for each discrete region;S6: give the speed boundary condition of combustible;S7: judge whether fuel particle exists;S8: if DPM particle exists, take DPM particle combustion temperature as the highest temperature when non-premixed combustion;S9: if DPM particle does not exist, calculate local combustion temperature according to combustible limit, fuel vapor mass fraction;S10: iteration traverses the entire combustion zone, and export temperature distribution evaluation result.The application overcomes the defects of complex combustion field CFD calculation, many parameters of fire core prediction method and slow speed in the prior art, and realizes fast evaluation in seconds.

The invention discloses an iron powder particle cloud combustion numerical calculation method for simulating and considering differential diffusion, and belongs to the field of iron powder combustion numerical simulation calculation. According to the method, numerical simulation can be carried out on 2D flames of iron powder particle cloud free propagation considering differential diffusion under the microgravity condition, and for the difference of thermal diffusivity between gas phase components, the effect of surface reaction kinetics and the effect of a diffusion control mechanism are considered at the same time in an autonomously established iron powder particle combustion model; the local Lewis number is calculated in real time, a diffusion term is corrected in a gas phase component equation, and the influence of differential diffusion on the flame temperature and flame propagation speed of iron powder particle cloud and the influence on the heat release rate of single particle combustion and the mass fraction of oxygen on the particle surface are quantitatively analyzed. The influence of oxygen concentration and thermal expansion on combustion of the iron powder particle cloud is further considered. The method has guiding significance for developing a lean fuel iron flame model with a low flame propagation speed and other metal particle combustion models.

The application discloses a mechanism model and method for pure boron combustion under high-temperature and high-pressure working conditions, and the model comprises an ICCD transient spectrum measurement system and a shock tube system; the shock tube system comprises a driving section, an experimental section and a diaphragm; the diaphragm is arranged between the experimental section and the driving end for separating the driving gas and the experimental gas, and the end of the experimental section is connected with the transient spectrum measurement system; an adjustable support rod is arranged at the end cover of the driving section; the method comprises the following steps: S1, using a boron particle combustion reaction mechanism device based on ReaxFF-MD to carry out an ignition experiment on boron powder; S2, calculating the meteorological reaction of the boron particle combustion reaction of ReaxFF-MD; S3, obtaining the MD simulation diagram of cluster combustion, the kinetic analysis result of the new reaction, the result of experimental verification and the reaction mechanism analysis result; the application solves the problem that the boron powder fuel has high volume and mass heat values, but the oxidation layer on the surface of the boron powder hinders ignition, and the high melting and boiling point properties of the boron powder limit combustion.

The application discloses a numerical calculation method for simulating iron powder particle cloud combustion considering differential diffusion, and belongs to the field of iron powder combustion numerical simulation calculation. The application can numerically simulate 2D free propagation of a flame of an iron powder particle cloud under microgravity conditions considering differential diffusion. For the difference of thermal diffusion rates among gas phase components, the application considers the effects of surface reaction kinetics and diffusion control mechanism in the self-established iron powder particle combustion model, calculates a local Lewis number in real time, corrects a diffusion term in a gas phase component equation, quantitatively analyzes the effects of differential diffusion on the flame temperature and flame propagation speed of the iron powder particle cloud, and the effects of differential diffusion on the heat release rate of single particle combustion and the oxygen mass fraction of a particle surface, and further considers the effects of oxygen concentration and thermal expansion on the iron powder particle cloud combustion. The application has guiding significance for developing a lean fuel iron flame model with low flame propagation speed and other metal particle combustion models.

The present application relates to solid propellant combustion technology, aiming at providing a lattice Boltzmann simulation prediction method for aluminum-based solid propellant combustion agglomeration. It comprises: using LBM method for solid propellant combustion process simulation and aluminum particle agglomeration behavior research, through mesoscale numerical simulation of solid propellant combustion process quantitative calculation and prediction, using the statistical physics principle of LBM to couple multiple field distribution, realize the simulation of complex aluminum particle combustion. The present application can more naturally simulate the drag force, thermophoretic force and other effects of particles in fluid, and is closer to the physical reality; can realize the reduction of calculation complexity, realizes the efficient simulation of tens of thousands of aluminum particle agglomeration process, significantly improves the calculation efficiency of large-scale particle system simulation; can deeply reveal the internal mechanism of pressure, burning rate, particle size, oxidizing gas concentration and other factors affecting agglomeration; realize the coupling of multiple physical fields, and truly reflect the complex environment in the combustion chamber.