113 results about "Flame propagation" patented technology

This application relates to the field of kitchen appliance technology, and more particularly to an inner ring burner cap and a gas stove. The inner ring burner cap has an inner ring cavity; ignition holes and flame-preserving holes, respectively communicating with the inner ring cavity, are formed on the side walls of the inner ring burner cap. The ignition holes are configured opposite to the ignition needle, and the flame-preserving holes are configured opposite to the thermocouple; a main burner hole, communicating with the inner ring cavity, is provided at the top of the inner ring burner cap; an ignition groove, communicating with the inner ring cavity, is formed on the outer side wall of the inner ring burner cap, arranged around the axis of the inner ring burner cap, and located between the outlet of the flame-preserving hole and the outlet of the main burner hole. The ignition groove on the inner ring burner cap facilitates the upward propagation of the flame at the flame-preserving hole to form a flame at the main burner hole, enabling the inner ring burner cap to achieve rapid and stable flame propagation, thus improving the user experience.

This application provides a flame-retardant silicone and its preparation method. In this flame-retardant silicone, through the synergistic effect of boron-containing polysiloxane prepolymer and functionalized boron nitride, the flame-retardant silicone has an afterflame time of ≤5s at 800℃, an oxygen index of ≥36%, and has passed UL94V-0 certification. It can quickly form a ceramic barrier layer at high temperatures, effectively preventing flame propagation. The helical structure of the siloxane main chain, combined with the reinforcing effect of functional fillers such as nano-fumed silica, low-melting-point glass powder, and activated inorganic smoke suppressant and flame retardant, makes the tensile strength of the flame-retardant silicone ≥45N, and the permanent tensile modulus retention rate ≥85% under 125% radial shrinkage, exhibiting excellent tear resistance. This flame-retardant silicone is suitable for applications requiring high flame-retardant performance, such as new energy cables and electronic device protection.

This utility model discloses a high-efficiency flame-arresting and explosion-proof valve suitable for dusty gas environments, including a valve body, a valve disc, a counterweight device, and a self-locking device. The valve body includes a valve shell and a top cover plate. Inlet flanges and outlet flanges are provided on the left and right sides of the valve shell. The inner side of the inlet flange extends into the valve body and is equipped with a rubber ring. The upper side of the valve disc is welded to a rotating shaft via a rotating arm. The two ends of the rotating shaft are rotatably connected to the valve body via bearings. The counterweight device includes a counterweight, a slender rod, and a stop rod. The self-locking device is a combination of a spring pin and a locking switch. In the event of an explosion, the high-efficiency flame-arresting and explosion-proof valve provided by this utility model closes the valve disc and is locked by the self-locking device, effectively cutting off the propagation path, achieving flame arrest and explosion isolation, preventing the propagation of shock waves and flames generated by the explosion, effectively preventing secondary and multiple explosions, and effectively protecting the safety of personnel and upstream equipment.

The application discloses a kind of multi-stage linkage explosion venting test methods combined with powdery combustion inhibitor, it is related to explosion-proof engineering and safety detection technical field;The method is by constructing with explosion venting device, ignition system, powdery inhibitor delivery system and pressure and optical sensor test cabin, uses PLC to realize ignition, pre-delivery, pressure relief trigger, synchronous inhibition and afterflame inhibition and so on multi-stage linkage control;And through pressure, temperature and flame sensor real-time acquisition of multi-dimensional data of explosion process;By before ignition, ignition instant and in the process of pressure relief with different doses of powdery inhibitor, the explosion suppression performance under different linkage strategies can be systematically evaluated;The application can simultaneously obtain peak pressure, pressure rise rate, flame propagation speed and re-burning conditions and other multi-parameters, realize the quantitative evaluation of the explosion suppression efficiency of powdery combustion inhibitor under multi-stage linkage explosion venting conditions, with the advantages of good data integrity, strong repeatability and suitable for standardization explosion-proof test method construction.

The utility model discloses a dry-type flame arrester for a coal mine gas conveying pipeline, which relates to the technical field of flame arresting of the coal mine gas conveying pipeline and comprises a shell component, a flame arresting part and a fastener. Through the combined design of the fire-retardant sleeve, the stainless steel wire mesh and the corrugated plate type fire-retardant disc, flame propagation can be effectively blocked, and gas explosion accidents are prevented; the flame arrester adopts the design of the shell assembly and the flame arresting part which are in mirror symmetry, is convenient to install and maintain, and ensures the stability of the structure through the connection of a fastener; the flame arrester is suitable for gas conveying pipelines with different pipe diameters, can meet the use requirements under different pressure conditions, and is wide in application range; when the gas passes through the flame arrester at the average flow speed of 15m / s, the pressure drop is less than or equal to 1kPa, so that the gas conveying efficiency is not influenced; in conclusion, the dry type flame arrester provided by the utility model can effectively solve the explosion problem in a coal mine gas conveying pipeline, insulates flame propagation, ensures the production safety of a coal mine, and has a wide application prospect.

The application provides a hydrogen-doped natural gas explosion characteristic experiment device in a confined space, which comprises a pipeline system and a gas distribution system, the pipeline system comprises a driving pipe, a visible pipe and a test pipe arranged in sequence, the gas distribution system comprises a vacuum pump, an electric control valve group and a gas cylinder pipeline connected with each electric control valve in the electric control valve group, and the gas distribution system is connected with the driving pipe through a gas inlet. The hydrogen-doped natural gas explosion accident characteristic evolution and inhibition experiment of different hydrogen proportions can be carried out, and important characteristic parameters in the deflagration and detonation flame propagation process of the hydrogen-doped natural gas can be recorded.

The application belongs to the technical field of fireproof and heat-insulating glass, and particularly relates to a fireproof and heat-insulating glass and a preparation process thereof, which comprises assembling frames, a glass body, reinforcing plates and fireproof and heat-insulating sponges, wherein the assembling frames are provided in pairs, the glass body is clamped on the inner walls of the assembling frames, the reinforcing plates are arranged between the two assembling frames and are connected through the reinforcing plates, and the fireproof and heat-insulating sponges are installed on the reinforcing plates; special tempered glass or fireproof glass is selected as a base material, the strength of the glass plate can be maintained at high temperature, the glass plate is subjected to mechanical processing and edge grinding treatment, the safety and compatibility of the component are ensured, the developed fireproof and heat-insulating sponge material has excellent heat-insulating property, can protect the structure from high temperature, adopts a hollow sandwich design to block heat and flame propagation, improves the fireproof performance, forms a closed system preventing smoke penetration through edge sealing and surface reflection coating, effectively reduces heat transfer, and realizes efficient heat insulation.

The application relates to a combustion and explosion risk prediction method and device based on a working condition self-adaptive fractal dimension, and particularly relates to the technical field of combustion and explosion safety. The method comprises the following steps: firstly, acquiring environment monitoring data and space structure data of a closed space; then, determining a flow field working condition in the closed space according to the environment monitoring data and the space structure data, the flow field working condition being used for determining a fractal dimension and a flame acceleration critical radius, the fractal dimension and the flame acceleration critical radius being self-adaptive to the turbulent intensity of the flow field working condition; using an overpressure prediction model to determine a combustion and explosion overpressure prediction result of a combustible mixture in the closed space according to the fractal dimension and the flame acceleration critical radius; and finally, determining a combustion and explosion risk grade corresponding to the closed space according to the combustion and explosion overpressure prediction result. The application can self-adaptively determine the flame propagation characteristics corresponding to the fluid working condition, predict the combustion and explosion overpressure, and further improve the combustion and explosion overpressure prediction accuracy.

A method and apparatus for operating a flare stack pilot with a fuel having a high flame speed includes a structure which is operable to recirculate products of combustion to be mixed with the incoming fuel to dilute the incoming fuel to reduce the flame speed of the resulting mixture.

The application discloses a kind of multi-phase mixture laminar flow flame burning rate measuring device and measuring method, the measuring device includes reaction shell, liquid atomization module, gas supply module, gas-liquid mixing module, rectifier nozzle module, ignition module and optical measurement module, reaction shell has the reaction cavity for gas-liquid mixing;Liquid atomization module is used to gather liquid fuel, and liquid fuel is atomized to form droplet;Gas supply module is used to control the flow and direction of gas into reaction cavity;Gas-liquid mixing module is arranged in reaction cavity, including the flow guide baffle for forming buffer space;Rectifier nozzle module includes rectifier unit and nozzle unit, rectifier unit is used to weaken flow field disturbance, and nozzle unit is used to output gas mist two-phase mixture fluid;Ignition module is used to ignite the gas mist two-phase mixture ejected;Optical measurement module is used to obtain flame propagation data.The measuring device can realize the accurate measurement and analysis of multi-phase mixture combustion process.

The invention relates to an experimental device and method for preventing a quadratic type cloud explosive bomb from fire channeling. The device comprises a cloud explosive bomb main body which is a hollow pipe containing central initiating explosive and cloud explosive fuel, an upper end opening is detachable, and a plurality of notch grooves are distributed in the inner side wall of the cloud explosive bomb main body. The central tube is filled with the porous material, the inert explosion suppression dust is uniformly dispersed in pores of the porous material, and explosion flame propagation of the central initiating explosive is inhibited under the combined action of the porous physical structure and the chemical explosion suppressant, so that the fire channeling phenomenon is prevented. The center initiating explosive is tightly connected with the detonator, and the detonator is fixed through a center initiating detonator plug. And the ignition delay system is used for controlling the initiation time sequence of the central primer detonator and the secondary primer detonator. The method can prevent the fire channeling phenomenon of the cloud explosive bomb, so that the damage power of the cloud explosive bomb is improved, and the method has the advantages of being simple in process, easy to operate, low in cost and suitable for batch production.

The present application relates to a kind of powder starting test device, solve the existing powder starting test bench cannot simulate high altitude low pressure environment, and powder starting test needs to be completed in dependence on whole machine test and on high altitude test stand, lead to test cost is high, research cycle is long and cannot early obtain component performance and flame propagation law Problem.It includes closed box, air pump, air pump, temperature measuring device, flame generator, barometer and multiple groups of cameras;Pressure in closed box is adjusted by air pump and air pump cooperation, simulate different altitude environment;Temperature measuring device can move along horizontal direction, temperature distribution in flame field is inducted by grid-like temperature indicating paint, cooperate multiple groups of cameras to capture flame range and propagation distance, realize the accurate test of the combustion performance of powder starting device under different altitude environment.The present application is compact in structure, convenient to operate, low in test cost, short in cycle, can early obtain key performance data, provide reliable support for the optimization design of powder starting device.

A flame mitigator for a container includes a plurality of wire portions reticulated to define a plurality of spaces therebetween and form a body having a substantially dome-shaped profile extending along a longitudinal axis between a first end and an opposite second end, and a rim positioned adjacent the first end and defining an opening of the body. The plurality of spaces collectively provide an openness of the opening to inhibit flame propagation along a fluid stream from entering into the container. The flame mitigator further includes a projection extending radially outward from the rim and defining a periphery of the body, and a well extending radially inward and longitudinally away from the rim to the second end. The projection is elastically deformable and configured to deflect relative to the rim.

This invention provides a combustion chamber head device and ignition method for a pure hydrogen gas turbine. It relates to the field of gas turbine combustion chamber design, solving the problem of unreliable ignition in existing pure hydrogen combustion chambers. The device includes: a fuel distribution component, a multi-cluster burner, and a base; the multi-cluster burner includes a central combustion cluster and multiple interconnected combustion clusters surrounding the central combustion cluster; the multiple interconnected combustion clusters are divided into N-stage combustion chambers; the fuel distribution component includes a central fuel pipe and N-stage interconnected fuel pipes; each stage of interconnected fuel pipes is isolated from each other and from the central fuel pipe; the central fuel pipe is connected to the top of the central combustion cluster; each stage of interconnected fuel pipe is connected to the top of its corresponding combustion chamber; the bottom ends of the central combustion cluster and the N-stage combustion chambers are respectively connected to the base. This invention provides reliable start-up, stable operation, and low emissions over wide loads, achieving multi-cluster interconnection and reliable flame propagation, significantly improving ignition success rate and combustion stability.

The invention provides a lithium ion battery, a preparation method thereof and electric equipment comprising the lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm and electrolyte. The diaphragm is of a three-layer composite structure and comprises polar polymer fiber layers located on the two sides and a thermal turn-off functional layer clamped between the polar polymer fiber layers. According to the lithium ion battery disclosed by the invention, under a high-temperature condition, the polar polymer fiber layer can maintain the structural integrity of the diaphragm and improve the wettability of an electrolyte, and the thermal shutdown functional layer is heated to be softened or molten to block micropores, so that rapid closing of an ion channel can be realized, internal current can be cut off, and thermal runaway spreading can be prevented; meanwhile, the flame retardant in the electrolyte is decomposed at a high temperature to generate a free radical trapping agent, so that the free radical chain reaction in the combustion process is effectively interrupted, and flame propagation is inhibited. Therefore, through the synergistic effect of the composite diaphragm and the flame-retardant electrolyte, the battery disclosed by the invention can be fully applicable to the fields of power and energy storage with high safety requirements.

Combustion system comprising: an injection device (40) configured to inject fuel into a combustion chamber (38) of an engine (91, 92); a spark plug (50) configured to perform ignition (I) of the fuel in the combustion chamber; and a normal control unit (65) configured to perform normal control (α) to cause the injection device to perform a predetermined normal injection (F), and subsequently to cause the spark plug to perform ignition, wherein in a predetermined delay range (D) in the combustion chamber the propagation of the flame (P) is further delayed than in any other range when normal control is performed, and in a knocking condition auto-ignition occurs in the fuel in the delay range when normal control is performed, the combustion system further comprising: an adjustment control unit (66),which is configured to perform a predetermined adjustment control (β) when the knock condition is established in order to suppress auto-ignition, wherein the adjustment control does the following: cause the injector to perform a predetermined main injection (Fm) and subsequently perform a predetermined partial injection (Fs) in a second half of a compression stroke to adjust fuel distribution in the combustion chamber to facilitate flame propagation (P) into the retardation region further than with normal injection, and subsequently cause the spark plug to perform ignition.

The invention relates to a rotating sliding arc plasma atomizing nozzle, and belongs to the technical field of combustion chambers. One end of an anode shell is connected with an air inlet structure and used for air inlet, and one end of an oil pipe arranged on the side face of the anode shell is connected with the side face of a cathode connector; the anode shell is matched with the cathode connector to generate plasma sliding arc; one end of the cathode connector is connected with the air inlet structure through a cathode connecting rod, and the other end of the cathode connector is connected with the atomizing nozzle; and the cathode connector, the atomizing nozzle and the oil pipe are communicated in sequence to convey a medium to the atomizing nozzle for atomization. The nozzle is simple in structure and high in universality, the size and flow distribution are compatible with those of a traditional nozzle, and direct replacement can be achieved. Fuel oil is cracked into small molecular fuel by plasma arc, and fuel oil drop particles are refined to reduce the spray particle size, so that the combustion efficiency and the flame propagation speed are remarkably improved, and the combustion range is effectively widened.

The utility model discloses a kind of explosion-proof fan, including the casing of three-layer composite explosion-proof resin material and wind wheel, wherein outer layer carbon nanotube PEEK composite material effectively leads out static electricity, middle aluminium hydroxide flame-retardant layer prevents flame spread, inner layer ultra-high molecular weight polyethylene reduces friction spark risk.Electrostatic belt can effectively eliminate static electricity accumulation in transmission process, avoid static spark, improve explosion-proof safety.Fan is equipped with rotary electrostatic brush and ground copper wire to eliminate static electricity, and fire barrier is configured at air inlet to prevent flame propagation.Wind wheel blade is provided with tungsten-containing wear-resistant coating and zircon ceramic wear-resistant strip to avoid friction spark.Explosion-proof motor is built-in temperature sensor and vibration sensor, and stator winding adopts arc-resistant enameled wire.The utility model solves the problem of heavy weight and single protection of traditional fan through multiple explosion-proof design, with the characteristics of lightweight, superior explosion-proof performance, stable and reliable operation, especially suitable for flammable and explosive places such as petroleum and chemical industry.

The application discloses a precombustion chamber jet piloting device integrated on a piston, which is characterized by a concave pool in the center of the top of the piston, an upper part of the concave pool being provided with a fence, a spherical flame injector being nested and welded in the fence above the concave pool, and the spherical flame injector covering the concave pool to form a cavity chamber. A plurality of jet pipes are arranged in the spherical flame injector. Two precombustion chambers are respectively communicated with the two sides of the fence, and the two precombustion chambers are located in the same plane but are asymmetrically arranged. The cavity chamber is provided with two conical passages respectively communicated with the two precombustion chambers, and two piloting injectors are respectively connected with the two precombustion chambers; two main fuel injectors are connected with a cylinder. The included angle between the central axis of the main fuel injector and the vertical direction is 120-140 degrees, and a scavenging port is arranged at the lower part of the cylinder. The main fuel enters the two precombustion chambers through the spherical flame injector, and the flame generated by the precombustion chamber ignites the main fuel in the cylinder through the spherical flame injector. The structure shortens the flame propagation distance and prevents the knocking phenomenon generated in the combustion chamber.

The utility model relates to the technical field of mining electrical equipment, and particularly discloses a mining flame-proof and intrinsically safe frequency conversion speed regulation control box, which comprises a control box provided with a box door, the interior of the control box is divided into a flame-proof cavity and an intrinsically safe cavity which are distributed up and down through a metal partition plate, and the top end of the control box is provided with a heat dissipation cavity. The heat dissipation cavity and the explosion-proof cavity are physically isolated through a heat conduction metal wall, strong and weak electricity physical isolation can be achieved through the explosion-proof cavity and the intrinsic safety cavity which are distributed up and down, energy crosstalk is avoided, the cavity distribution is optimized, and meanwhile regional operation of maintenance personnel is facilitated. The stepped concave-convex structure is matched with the double-layer sealing structure, explosion flames and pressure can be limited in the cavity, the explosion flames and high-temperature gas in the explosion-proof cavity are prevented from leaking out, the external environment is prevented from being ignited, the explosion-proof reliability is achieved, compared with traditional plane sealing, the stepped concave-convex structure can increase the complexity of a flame propagation path, and the explosion-proof performance is improved. The vibration deformation resistance is improved, and the sealing performance can still be kept after long-term use.

An electrical machine includes an enclosure that features a plurality of assembly joints. An ignition source ignites a reactant mixture distributed within the enclosure to cause a flame to propagate from inside the enclosure to outside the enclosure through one or more flame paths. The one or more flame paths are formed along the plurality of assembly joints, where one or more porous linings are positioned along the one or more flame paths, and where the one or more porous linings within the one or more flame paths cool down and reduce a flow rate of the flame as the flame propagates through the one or more flame paths.

The present application belongs to the field of new fuel, and specifically provides a special low-emission high-efficiency fuel for parallel hybrid electric vehicles, which mainly comprises alkylated gasoline, oxygen-containing fuel, hydrogenated gasoline, C7 aromatic hydrocarbon, C8 aromatic hydrocarbon, high olefin C5 and raffinate oil. Compared with traditional vehicle gasoline, the special fuel has low C9+ aromatic hydrocarbon content, higher alcohol addition and higher paraffin content, which ensures better fuel economy and lower emission characteristics of the parallel hybrid engine under the frequent start-stop working condition. The low C9+ aromatic hydrocarbon content and alcohol fuel can reduce PN emission; at the same time, the alcohol fuel and high paraffin content can increase the flame propagation speed and combustion stability, so that the PN emission is reduced and the combustion efficiency is improved during the start-stop process, which can realize more than 50% reduction of PN emission and 5%-10% reduction of fuel consumption.

The invention discloses a hydrogen internal combustion engine injection control method based on pre-combustion chamber ignition, which comprises the following steps of: when a piston is positioned in a range of a crankshaft angle of 50-70 degrees before a compression top dead center, starting to inject hydrogen into a pre-combustion chamber; the hydrogen injection duration of the pre-combustion chamber is controlled to be smaller than a 5-degree crankshaft angle, and the equivalence ratio of the pre-combustion chamber during ignition is 0.8-1.2; when the piston is close to an upper dead center, a pre-combustion chamber spark plug is triggered to ignite, so that a pre-combustion chamber flame kernel is formed within a crankshaft angle of 1-5 degrees after ignition; flame of the pre-combustion chamber is sprayed into the main combustion chamber through the jet flow channel, multi-point ignition flame cores are formed in the main combustion chamber, and combustion of mixed gas formed by mixing hydrogen and air is promoted. And when the compression stroke is finished, hydrogen injection of the pre-combustion chamber is stopped, and the total injection duration angle does not exceed the 100-degree crankshaft angle before the lower dead center of the piston. According to the hydrogen internal combustion engine injection control method based on pre-combustion chamber ignition, by optimizing the time, duration and control strategy of pre-combustion chamber fuel injection and cooperating with a corresponding sensing and feedback adjusting mechanism, stable and rapid ignition and flame propagation of hydrogen lean combustion are achieved, and the combustion efficiency is improved. The lean burn limit is widened, NOx emission is reduced, and the heat efficiency of the engine is remarkably improved. The invention further discloses an engine system.

This invention discloses a method and system for analyzing the steady-state of a laminar diffusion jet flame, relating to the field of gas turbine combustion technology. The method includes: obtaining the instantaneous propagation velocity of the laminar jet diffusion flame when the flame root reaches its final stable position during propagation towards the nozzle. S d and the local airflow velocity at that location U G ;according to S d and U G Determine the instantaneous combustion rate; compare the instantaneous combustion rate with... U G If the difference between the two is within a preset range, it indicates that the combustion rate and the local airflow velocity are in dynamic equilibrium, and it is determined to be a pusher flame; if the instantaneous combustion rate is greater than 1, it indicates that the combustion rate and the local airflow velocity are in dynamic equilibrium, and it is determined to be a pusher flame. U G If the difference exceeds a preset range, it indicates that the flame propagation and the extinction caused by heat loss are in equilibrium, and the flame is identified as an attached flame. This invention achieves precise identification of the flame's stable state by quantifying the comparison between combustion rate and airflow rate, providing a quantitative basis for combustion adjustment and significantly reducing operational blindness and time costs. A corresponding analysis system is also provided.

According to the integrated graphite gap lightning protection module provided by the utility model, the heat conduction columns are arranged at the bottom of the accommodating cavity and on the inner side of the cover plate in an array manner, and the insulating partition plates are arranged on the heat conduction columns, so that the heat conduction area is obviously increased, and the heat generated by the graphite gap lightning protection module is effectively and quickly conducted out of the accommodating cavity; the graphite gap lightning protection assembly is prevented from being overheated due to heat accumulation to affect the service life or cause safety accidents, and the performance stability of the lightning protection module is improved. And secondly, the insulating partition plate is composed of a flame-retardant layer, a heat conduction silica gel layer and an insulating base material layer, the heat conduction efficiency in the containing cavity is further improved through the arrangement of the heat conduction silica gel layer, flame propagation in the shell can be blocked through the flame-retardant layer, fire can be prevented from spreading in the shell, and the fire risk is reduced. And finally, the shell and the cover plate are each composed of a high-strength base material layer, a fireproof layer and a corrosion-resistant layer, the arrangement of the fireproof layers can effectively block propagation of flames inside and outside the shell and the cover plate, and the fireproof safety of the lightning protection module is improved.

The invention discloses a dual-fuel natural gas engine combustion system and a control method, and relates to the technical field of natural gas engines, the system comprises an air cylinder, a piston is arranged in the air cylinder, the piston reciprocates in the air cylinder, a shallow-basin-shaped groove is formed in the top of the piston, and a combustion chamber is formed by the shallow-basin-shaped groove and the wall surface of the air cylinder; an ignition device is arranged at the top of the cylinder; the gas inlet channel is communicated with the combustion chamber, and a dimethyl ether ejector and a natural gas ejector are arranged on the gas inlet channel; the electronic control unit is configured to receive an engine load signal, independently control injection parameters of the natural gas injector and the dimethyl ether injector according to the engine load signal, and match different combustion modes by controlling an ignition device; the natural gas flame propagation speed can be increased, meanwhile, heat transfer loss is reduced, in addition, according to the engine operation working condition, the combustion modes are flexibly switched, and the full-load efficiency is improved.

The application provides a preparation method of fireproof heat-resistant paint, fireproof heat-resistant paint and a battery, and particularly relates to the technical field of paint. The preparation method of the fireproof heat-resistant paint comprises the following steps: adding silica gel particle powder, a high-molecular polymer and mesoporous honeycomb-shaped aluminum hydroxide into a solvent, and stirring uniformly to obtain the fireproof heat-resistant paint. The fireproof heat-resistant paint prepared by the preparation method has the mesoporous honeycomb-shaped aluminum hydroxide with rich pore structures and a large specific surface area, so that the heat in the combustion process is reduced, and heat transfer and flame propagation are prevented. Moreover, the aluminum hydroxide is decomposed to release water under heat, absorbs heat to reduce the system temperature, and the generated aluminum oxide is a refractory material, which is covered near the battery to improve the ability to resist flames, so that the purpose of preventing combustion by isolating air is achieved, and more serious accidents are prevented. The silica gel particle is compounded with the mesoporous honeycomb-shaped aluminum hydroxide, so that the performance of the fireproof heat-resistant paint is improved, and the fire-retardant effect is improved.

The application discloses an ammonia-hydrogen engine based on a reforming mechanism, which comprises an engine controller, an ammonia fuel tank, a fuel pump, a multifunctional ammonia reformer, a throttle valve, a circulating reciprocating internal combustion engine and a controllable flow control device. The ammonia is reformed into hydrogen by the multifunctional ammonia reformer for use, so that the hydrogen enters a premixing chamber through a second valve to be mixed with ammonia to form hydrogen-rich fuel for combustion, thereby overcoming the shortcomings of a pure hydrogen engine, such as insufficient power, and a pure ammonia engine, such as high ignition energy, slow flame propagation speed and difficult ignition. In addition, the hydrogen-rich ratio is calculated based on the current load of the ammonia-hydrogen engine, the target ammonia injection amount and the target hydrogen injection amount are calculated according to the hydrogen-rich ratio and the target hydrogen-ammonia fuel supply amount, so as to realize accurate control of the ammonia injection amount and the hydrogen injection amount, and make the mixed fuel in the circulating reciprocating internal combustion engine more combustible, the flame more stable and the combustion more sufficient.

The invention discloses a composite turbulent flow EGR stratified combustion system for a gas engine, which comprises a multi-valve composite turbulent flow structure, a rotational flow and turbulent flow mixer and a self-adaptive high-energy ignition system, and the multi-valve composite turbulent flow structure ensures that both a core area flow field and a peripheral area flow field of a combustion chamber have enough turbulent flow intensity; an EGR layered control strategy of an air inlet channel is achieved through air inlet manifold distribution and air channel arrangement, the EGR concentration of a mixture entering a tumble air channel is low, the EGR concentration of a mixture entering a vortex air channel is high, and therefore the space distribution rule of low EGR of a flow field of a combustion chamber core area and high EGR of a flow field of a combustion chamber peripheral area is achieved. Through the synergistic effect of the composite turbulent flow system, EGR layering, intake manifold turbulent flow and self-adaptive high-energy ignition, the comprehensive effects of rapid formation of fire cores at the initial stage of combustion, flame propagation acceleration, reduction of the knocking tendency and enhancement of combustion stability are achieved, and the self-adaptive high-energy ignition system is particularly suitable for popularization and application of natural gas fuel in heavy trucks and ship engines.