21 results about "Stratified combustion" patented technology

The invention discloses a constant-volume optical test platform suitable for ammonia-hydrogen stratified combustion and a test method. The test platform comprises an experiment bench; the constant-volume combustion bomb is mounted on the experiment bench, and the interior of the constant-volume combustion bomb is divided into a combustion chamber and two heating chambers by two partition pieces; the ejector mounting seat is arranged at the top of the combustion chamber; the hydrogen ejector is mounted on the ejector mounting seat and is arranged towards the center of the combustion chamber; the two spark plugs are respectively arranged on the two separators and are arranged towards the center of the combustion chamber; the ammonia gas-air channel is arranged on the ejector mounting seat; the two first windows are symmetrically arranged on the two side faces, adjacent to the partition piece, of the combustion chamber. The second window is arranged on the bottom surface of the combustion chamber; the optical system is installed on the experiment bench, and the optical system and the constant volume combustion bomb form an optical path position required by a schlieren method and a direct shooting method; and the control system is electrically connected with the hydrogen ejector, the spark plug and the optical system.

The invention discloses an ammonia hydrogen fuel engine combustion system and method, and belongs to the technical field of clean energy, the system comprises a shell, the shell is provided with a combustion chamber, a pre-combustion chamber, an air inlet channel and an exhaust channel, and the pre-combustion chamber, the air inlet channel and the exhaust channel communicate with the combustion chamber; the injection valve set comprises an air inlet channel hydrogen injection valve, a pre-combustion chamber hydrogen injection valve, a direct injection hydrogen injection valve and an air inlet channel ammonia injection valve. The supply assembly comprises a hydrogen supply unit and an ammonia gas supply unit, the ammonia gas supply unit supplies ammonia gas to the combustion chamber through a gas inlet channel ammonia gas injection valve, and the hydrogen supply unit supplies hydrogen gas to the combustion chamber through a gas inlet channel hydrogen injection valve, a pre-combustion chamber hydrogen injection valve and a direct injection hydrogen injection valve; switching of the pure hydrogen premixed combustion mode, the pure hydrogen stratified combustion mode and the ammonia-hydrogen mixed combustion mode is achieved by adjusting the injection valve set and the supply assembly, the problems of abnormal combustion, power reduction and NOX and N2O emission existing on the engine are solved, and the operation stability of the engine is improved.

The invention relates to the technical field of natural gas hydrogen-doped power plant emission, and discloses a low nitrogen oxide emission combustion system and a combustion method, the low nitrogen oxide emission combustion system comprises a combustor, an air distributor, a flue gas circulation unit, a catalytic reduction unit and a control unit; the combustor comprises a shell with a combustion chamber, a hydrogen inlet, a natural gas inlet, an air inlet and a smoke outlet are formed in the shell, a hydrogen nozzle, a natural gas nozzle and an air nozzle are formed in the combustion chamber, and the natural gas nozzle, the hydrogen nozzle and the air nozzle are sequentially arranged in the combustion chamber at intervals from inside to outside. The air distributor is communicated with the air inlet, the flue gas circulation unit is provided with an air inlet side and an air outlet side, the air inlet side is communicated with the flue gas outlet, the air outlet side is communicated with the air distributor, and the catalytic reduction unit is communicated with the flue gas outlet. Natural gas and hydrogen are subjected to annular stratified combustion in the combustion chamber from inside to outside, flue gas reflows to dilute heat released by combustion of the natural gas and the hydrogen, and generation of nitric oxide in initial flue gas after combustion is reduced.

The application relates to an EUV process waste gas treatment device and method, wherein the EUV process waste gas treatment device comprises a water tank assembly, a reaction tower assembly and a washing tower assembly are connected to the water tank assembly; the reaction tower assembly comprises a gas inlet top cover, a reaction cavity tower section and a cooling spray tower section which are sequentially arranged; a plurality of process waste gas inlets and a plurality of first combustion-supporting gas inlets are connected to the gas inlet top cover and used for respectively introducing process waste gas and combustion-supporting gas into the gas inlet top cover; the plurality of process waste gas inlets are inclined and centered with respect to the axis of the gas inlet top cover and cross each other; the reaction cavity tower section is connected with at least two second combustion-supporting gas inlets which are used for externally supplementing combustion-supporting gas into the reaction cavity tower section and are used for forming multi-stage layered combustion in the gas inlet top cover and the reaction cavity tower section. The application can be applied to waste gas treatment with hydrogen flow varying in a large range of 0-500 SLM, and the treatment efficiency is effectively improved.

A method for controlling an internal combustion engine, said internal combustion engine comprising a cylinder designed to be able to undergo stratified combustion, said method comprising, for each combustion cycle, the steps of: a. determining (31) the number of injection and ignition patterns to be implemented, b. determining (32) the amount of fuel to be injected at each injection by dividing the amount of fuel to be injected in the combustion cycle by the number of patterns to be implemented, c. determining (33) the time of each pattern as a function of the crank angle, said time of each pattern being between the intake bottom dead center and the combustion top dead center of the combustion cycle, d. controlling (34) the fuel injection circuit and the ignition device to produce the patterns as a function of the crank angle, the amount of fuel to be injected for each pattern and the timing of each pattern.

The invention discloses an air cylinder working assembly, an air cylinder and a piston type engine, and relates to the technical field of engines, the air cylinder working assembly comprises an air cylinder sleeve and a piston, the piston can reciprocate in the air cylinder sleeve, the air cylinder sleeve comprises an upper half part and a lower half part, and the wall thickness of the upper half part is larger than that of the lower half part; a plurality of circles of cooling channels are formed in the outer wall of the upper half part, and cooling media circulate in the cooling channels; a plurality of ring grooves are formed in the outer wall of the piston, the ring grooves are used for installing piston rings, the piston rings are sequentially arranged in the length direction of the piston, the piston rings are arranged close to the upper end of the piston, the piston rings are divided into gas rings and oil rings, and the oil rings are arranged below the gas rings; the cylinder comprises a cylinder working assembly; the piston type engine comprises a combustion chamber and an air cylinder, and lean combustion or stratified combustion is adopted in the combustion chamber. Side abrasion of the air cylinder sleeve can be avoided, and then the reliability and durability of the piston type engine are improved.

The application relates to an EUV process waste gas treatment device and method, wherein the EUV process waste gas treatment device comprises a water tank assembly, a reaction tower assembly and a washing tower assembly are connected to the water tank assembly; the reaction tower assembly comprises a gas inlet top cover, a reaction cavity tower section and a cooling spray tower section which are sequentially arranged; a plurality of process waste gas inlets and a plurality of first combustion-supporting gas inlets are connected to the gas inlet top cover and used for respectively introducing process waste gas and combustion-supporting gas into the gas inlet top cover; the plurality of process waste gas inlets are inclined and centered with respect to the axis of the gas inlet top cover and cross each other; the reaction cavity tower section is connected with at least two second combustion-supporting gas inlets which are used for externally supplementing combustion-supporting gas into the reaction cavity tower section and are used for forming multi-stage layered combustion in the gas inlet top cover and the reaction cavity tower section. The application can be applied to waste gas treatment with hydrogen flow varying in a large range of 0-500 SLM, and the treatment efficiency is effectively improved.

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.

The invention discloses a combustion system for a shaft furnace for direct rod manufacturing through recycled copper, and relates to the field of recycled copper machining, the combustion system comprises the shaft furnace, a combustion unit, a staged heat cycle air supply unit and a temperature control feedback unit, the combustion unit comprises at least three double-swirl combustors, the three double-swirl combustors are arranged around the furnace wall of the shaft furnace, and the temperature control feedback unit is arranged on the double-swirl combustors. The multiple sets of combustion units are distributed in the height direction of the shaft furnace, a conical opening is formed in the top end of the shaft furnace, the top end of the conical opening communicates with an exhaust pipe, the exhaust pipe is provided with a heat exchanger, gradient heating is achieved through the stratified combustion design, raw materials are preheated through the upper combustion unit, and the heat load of the lower combustion unit is reduced; and the contact area of flames and the raw materials is increased through the double-rotational-flow combustion technology, the heat transfer efficiency is improved, and the time from feeding to melting of the raw materials is shortened.

The invention discloses a methanol-diesel oil-hydrogen energy multi-fuel self-adaptive dynamic coupling system for an inland ship. The methanol-diesel oil-hydrogen energy multi-fuel self-adaptive dynamic coupling system comprises a multi-fuel independent storage and accurate supply subsystem, a methanol online catalytic hydrolysis hydrogen production subsystem, an intelligent fuel control subsystem, an engine main body and a whole-process safety protection subsystem. The multi-fuel system stores and conveys fuel, the hydrogen production subsystem generates hydrogen, the intelligent unit collects parameters and controls fuel supply, and the safety system monitors and protects. According to the system, through multi-fuel cooperation and online hydrogen production, the problems that single diesel oil is high in pollution and hydrogen energy is difficult to store and transport are solved; intelligent control adapts to working conditions to adjust fuel proportion, and economical efficiency is improved by more than 15%; nitrogen oxides are reduced by 40% and particulate matters are reduced by 65% by the stratified combustion technology; and reliable operation is ensured through full-process protection. The method is suitable for frequent starting and stopping of inland ships and variable working condition scenes and has good application prospects.

The utility model belongs to the technical field of boilers, and particularly relates to a boiler waste heat utilization device which comprises a boiler inner container, the boiler inner container is installed on a bottom plate, a boiler shell covers the bottom plate, a water cavity is formed among the boiler shell, the boiler inner container and the bottom plate, and a water inlet and a water outlet are formed in the boiler shell. The boiler inner container comprises a combustion chamber and a plurality of heat source bodies, the adjacent heat source bodies are communicated through transverse pipes and form an S-shaped channel, the combustion chamber is communicated with the S-shaped channel, heat source body pipes are inserted into the heat source bodies, the combustion chamber is communicated with an air inlet, a reverse combustion furnace door, a forward combustion furnace door and an ash removal door, and an upper furnace branch pipe and a lower furnace branch pipe are inserted into the combustion chamber at intervals up and down. The S-shaped channel communicates with an air inlet of the induced draft fan. The stratified combustion bin is designed to adapt to fuels of different volumes, sufficient combustion of the fuels is ensured, the energy utilization rate is increased, waste heat can be efficiently recycled through a serpentine channel, and energy consumption and thermal pollution are reduced. The device is small in size, the installation difficulty and cost can be reduced, and the application scene is widened.

The utility model discloses a layered material distribution combustion system of a coal-fired boiler, and relates to the technical field of coal-fired auxiliary efficiency improvement. The coal feeding device comprises a combustion chamber, a fire grate is arranged in the combustion chamber, layered feeding mechanisms are arranged on the two side walls of the combustion chamber respectively, the discharging ends of the layered feeding mechanisms are arranged above the feeding side of the fire grate, and the layered feeding mechanisms output bottom-layer coal, middle-layer coal and upper-layer coal in sequence at a time; the purpose of adding different types of stratified combustion above the fire grate of the combustion system is achieved.

This invention discloses a stratified combustion system and control method for medium- and heavy-duty gas engines using ammonia-hydrogen fuel. The system employs a "three-intake valve + two-exhaust valve" arrangement, utilizing independent designs of two vortex intake manifolds on both sides and a central tumble intake manifold. The tumble manifold is used in conjunction with hydrogen injection, while the vortex manifold is used in conjunction with ammonia injection. Combined with a roof-type cylinder head and an eccentric guide piston, this constructs a stratified combustion system for ammonia-hydrogen fuel. This system can generate small-scale, high-intensity turbulence near the spark plug and maintain a locally rich hydrogen mixture, ensuring ignition stability. Outside the combustion chamber, large-scale vortices maintain rapid flame propagation of the ammonia mixture. This invention achieves controllable adjustment of intake volume and in-cylinder flow field across the entire operating range by dynamically adjusting the intake valve lift, in conjunction with a turbocharging system and an EGR system, thus improving the engine's thermal efficiency while maintaining its power performance.

The invention discloses an anti-explosion control method and system for hydrogen-water double-spraying combustion of an HCNG engine. The control method comprises the steps that the rotating speed of the engine and the valve lift are obtained to determine working conditions; inquiring preset parameters to adjust the engine; through monitoring of a knock sensor, hydrogen / water injection timing, ignition timing, the EGR rate and the water injection pulse width are sequentially adjusted to suppress explosion; judging the power, and if not, adjusting the air inflow, the hydrogen doping ratio and the like; and finally updating parameters, and circularly judging the next working condition. The mode of'natural gas-air-EGR out-cylinder premixing + hydrogen in-cylinder direct injection + water in-cylinder direct injection 'is adopted, accurate regulation and control and efficient stratified combustion of fuel are achieved, the hydrogen fuel utilization rate is increased, and the circulation change rate is reduced. For anti-detonation, five-stage progressive closed-loop control is constructed, detonation intensity is taken as a criterion, water spraying cooling is preferentially carried out, EGR dilution and water spraying increment assistance are carried out when necessary, high-hydrogen-doping-ratio operation is guaranteed, NOx emission is reduced, and collaborative optimization of anti-detonation performance, dynamic performance and low emission is achieved.

The invention relates to the technical field of internal combustion engines, and discloses a nozzle structure of a hydrogen ejector, the hydrogen ejector, an internal combustion engine and a vehicle. The multiple first gas spraying parts are located outside the nozzle body, first gas spraying holes communicating with the gas storage groove are formed in the first gas spraying parts, the first gas spraying holes incline in the direction away from the nozzle body in the direction from the open end of the gas storage groove to the groove bottom wall of the gas storage groove, and an included angle is formed between the central axis of each first gas spraying hole and the first direction; the included angle is larger than or equal to 30 degrees and smaller than or equal to 60 Therefore, the included angle formed by the central axis of the first gas spraying hole and the first direction is larger than or equal to 30 degrees and smaller than or equal to 60 degrees, the uniformity of mixed gas in the main combustion chamber of the air cylinder can be improved, the combustion efficiency and stability can be improved, the stratified combustion effect can be improved, and therefore the combustion efficiency of the mixed gas in the internal combustion engine is improved; performance of the internal combustion engine is improved.

The invention relates to the technical field of fuels, and discloses a modified water-based clean fuel and a preparation method thereof, and the modified water-based clean fuel comprises 65-90% of methanol, 5-30% of 180 # heavy oil, 0.8-1.0% of sorbitan monooleate, 1.2-2.0% of polyoxyethylene sorbitan monooleate, 0.9-1.5% of a composite stabilizer and 0.1-0.2% of a combustion improver. Wherein the compound stabilizer is prepared by reacting oleic acid with diethylenetriamine and is used for forming a stable steric hindrance layer on an oil-alcohol interface; the combustion improver is a ferrocene derivative and is used for catalyzing complete combustion of heavy oil components. The preparation method comprises the following steps: mixing the components to form an alcohol phase solution, and carrying out high-speed shearing emulsification and high-pressure homogenization treatment on the alcohol phase solution and preheated heavy oil. Through the synergistic effect of the specific stabilizer and the combustion improver, the problems that a high-proportion methanol and heavy oil mixed fuel is prone to layering and insufficient in combustion are solved, and the prepared fuel has the advantages of being excellent in storage stability, high in combustion efficiency and clean in emission.

Direct injection stratified charge combustion engine, including: a combustion cylinder (14) to receive an air-fuel mixture; an air intake channel to allow air into the combustion cylinder (14); a fuel injector (22) configured to deliver fuel within the cylinder in a spray pattern (24) that is substantially aligned with a cylinder central axis (26) to produce the air-fuel mixture; a spark igniter located within a path of the spray pattern to ignite the combustion of the air-fuel mixture; and a movable piston (12) defining a lower boundary of the combustion cylinder (14) to contain the combustion of the air-fuel mixture, wherein the piston (12) includes a bowl section (36) with an angled re-entrant edge and a centrally arranged convex bulge in the direction of the cylinder central axis (26), which is arranged on an inlet opening side of the combustion cylinder (14) to deflect the fluid flow to a vortex in fluid association with a combustion site near the cylinder central axis (26), characterized in that the movable piston (12) further comprises an extension wall (542) which is defined by a top surface (242) on the inlet channel side.

The invention discloses an ammonia hydrogen production coupling biodiesel supply system and an operation method, and relates to the technical field of internal combustion engine fuel supply, the supply system comprises a biodiesel tank, the biodiesel tank is connected with a biodiesel injector, and biodiesel is injected into an engine cylinder through the biodiesel injector. According to the ammonia hydrogen production coupling biodiesel supply system and the operation method, in the system starting stage, through cooperation of electric heating and waste heat recovery, the ammonia decomposition reactor rapidly reaches the reaction temperature, and compared with a traditional pure electric heating mode, starting energy consumption is reduced; during low-load driving, the proportion of liquid ammonia is automatically reduced, stratified combustion is formed by hydrogen and biodiesel, and fuel consumption per hundred kilometers is remarkably reduced in cooperation with recovery of air energy by a large-area heat exchanger; during high-load climbing, the ammonia proportion is increased, the reactor is heated through double heat sources to ensure that ammonia is fully decomposed, and the problem of biodiesel power response lag is solved through the high combustion speed of hydrogen.

To improve accuracy of a turbine inlet exhaust temperature which is a basis of temperature estimation of an exhaust system component.SOLUTION: The temperature estimation device includes a turbine-inlet exhaust-temperature map for stratified charge combustion 31 that outputs an exhaust temperature at an inlet of the turbine with respect to a rotational speed and a charging efficiency of the internal combustion engine on the assumption of stratified charge combustion, a turbine-inlet exhaust temperature map for homogeneous charge combustion 32 that outputs an exhaust temperature at the inlet of the turbine with respect to the rotational speed and the charging efficiency of the internal combustion engine on the assumption of homogeneous charge combustion, and a turbine-inlet exhaust temperature map for fuel cut 33 that outputs an exhaust temperature at the inlet of the turbine with respect to the rotational speed and the charging efficiency of the internal combustion engine on the assumption of a fuel cut state. The estimated temperature selected based on the stratified combustion determination flag and the fuel cut determination flag is given to a temperature estimation model for estimating the exhaust system component temperature.SELECTED DRAWING: Figure 3

This invention relates to the field of combustion furnace technology and discloses a glass melting furnace, comprising: a combustion furnace, a top-mounted burner, and a non-carbon-based burner. The combustion furnace includes a small furnace arch, side walls, and a small furnace bottom plate, which together form a combustion chamber. The top-mounted burner is installed on the combustion furnace and can penetrate the small furnace arch to extend into the combustion furnace. The top-mounted burner is suitable for introducing carbon-based fuel. The non-carbon-based burner is also installed on the combustion furnace and is suitable for penetrating the side walls and / or the small furnace bottom plate to extend into the combustion furnace. The non-carbon-based burner is suitable for introducing non-carbon-based fuel. This invention achieves spatially stratified combustion, resulting in more uniform fuel distribution within the combustion chamber, more complete combustion, and a more balanced heat distribution. It also generates secondary thermal radiation, compensating for the weak flame radiation capability of non-carbon-based fuels and improving the heat transfer efficiency of the molten glass.

The invention discloses a stratified combustion system of a hydrogen engine and a control method of the stratified combustion system, and relates to the technical field of engine combustion, the stratified combustion system comprises an air inlet channel injection system, an in-cylinder direct injection system and an engine controller, the air inlet channel injection system comprises an air inlet channel hydrogen injector, a first hydrogen rail and a first pressure reducing valve; the in-cylinder direct injection system comprises an in-cylinder direct injection hydrogen injector, a second hydrogen rail and a second pressure reducing valve, the first pressure reducing valve is located between the first hydrogen rail and the second hydrogen rail, and the second pressure reducing valve is located between the second hydrogen rail and the hydrogen tank. According to the engine operation condition, an engine controller injects in an advancing air channel in a working cycle to form uniform rarefied mixed gas, then in-cylinder direct injection is carried out to form high-concentration mixed gas near a sparking plug, stratified combustion becomes possible, and the combustion efficiency is improved.