12results about How to "Guaranteed combustion stability" patented technology

The invention discloses a deep in-situ resource composite fluidization mining method. The method comprises deep in-situ resource liquefaction mining, deep in-situ resource gasification mining and deep in-situ resource reinforcement and degradation. Wherein deep in-situ resource liquefaction exploitation is realized through combination of well group hydraulic fracturing and organic solvent dissolution; in the deep in-situ resource gasification mining, the residual solid coal resources after liquefaction are gasified and combusted, and heat extraction is achieved through heat exchange; in the deep in-situ resource reinforcement and degradation process, during filling reinforcement, residual coal resources are continuously utilized through the degradation effect of microorganisms; integrated mining is formed through mutual cooperation of liquefaction, gasification and microbial degradation of deep in-situ resources, the utilization efficiency of deep in-situ resource conversion is greatly improved, the resource recovery rate is remarkably improved, underground residual chemical reagents are treated, the problem of environmental pollution is effectively relieved, and the method is suitable for industrial production. And a technical support is provided for the development of a deep in-situ resource fluidization mining theory.

The utility model belongs to the technical field of combustion, and particularly discloses a fire grate, a combustor and gas heating equipment. The fire grate comprises an inner shell, an inner core head and a rectification inner core. An injection channel and a first flame channel which communicate with each other are formed in the inner shell, and the upper end of the first flame channel is open; the inner core head comprises a fire hole plate covering an opening in the upper end of the first flame channel, and at least three first fire holes are formed in the fire hole plate in the first direction of the fire row; the rectifying inner core is vertically inserted into the first flame channel, the rectifying inner core and the two side walls, in the first direction, of the inner shell are arranged at intervals, the upper portion of the first flame channel is divided into a plurality of sub-flow channels through the rectifying inner core, and the upper end of each sub-flow channel communicates with the corresponding first fire hole. According to the fire grate, the combustor and the fuel gas heating equipment, the structure of the fire grate can be simplified while the combustion stability is improved, the machining difficulty of the fire grate is reduced, and therefore the cost of the combustor and the fuel gas heating equipment is reduced.

The present application belongs to the technical field of internal combustion engine, and particularly relates to a kind of alcohol hydrogen fusion engine precombustion chamber system and its control method.Alcohol hydrogen fusion engine precombustion chamber system includes the engine main body with the main combustion chamber and precombustion chamber being communicated with each other, and also includes methanol supply unit, hydrogen production unit, hydrogen delivery control unit, exhaust gas recirculation unit and main control unit;Main control unit collects engine operating parameters and judges current working condition, and adjusts methanol supply path, hydrogen supply path, precombustion chamber working mode, hydrogen production unit heating mode and on-off state of exhaust gas recirculation unit according to working condition.The present application can realize engine full-condition combustion performance optimization without complex auxiliary device, and also considers cold start reliability, high and low load combustion stability and operation energy efficiency, to improve the whole machine operation reliability and transient response capability.

The application discloses a combined propulsion device mode conversion scheme design method, comprising the following steps: obtaining a Mach number interval of a combined propulsion device when the combined propulsion device is converted from a first mode to a second mode, and selecting a plurality of representative flight state points; for each representative flight state point, respectively performing discrete scanning on a primary propulsion unit mass flow range and a secondary fuel fuel-air ratio range, to form a plurality of candidate working condition combinations; for each candidate working condition combination, calculating flow and combustion characteristics in a thrust chamber, and screening a target working condition combination which can stably combust and meet a thrust demand; obtaining an optimal target working condition combination under each representative flight state point based on enumeration search, and generating a continuous and implementable mode conversion scheduling path. The application is applied to the combined propulsion field, and can effectively realize efficient, stable and safe operation of a mode conversion process.

The invention discloses a self-adaptive control method for a low-carbon multi-fuel internal combustion engine based on fuel activity online identification, which comprises the following steps of: acquiring a pressure signal in a cylinder and a crank angle signal, calculating an instantaneous apparent heat release rate, and extracting waveform topological characteristics of the heat release rate; inputting the extracted heat release rate waveform topological features into the trained fuel activity mapping model to obtain an equivalent reaction activity index of the current mixed fuel; based on the equivalent reaction activity index, dynamically interpolating in a map database or switching to a corresponding reference control strategy, determining a basic value of a control parameter under the current working condition, and performing closed-loop increment correction on the control parameter based on the deviation between the current combustion parameter and a target parameter to obtain a correction value, and performing one-cycle control by taking the sum of the basic value and the correction value as a final value of the control parameter. The invention further discloses a corresponding control system. The combustion stability of the internal combustion engine under the multi-fuel variable working condition can be ensured without knowing the specific fuel type.

The warmer with the heat conduction structure comprises a gas cylinder, an ignition container and a fire grate, the gas cylinder is used for storing combustible gas, the ignition container is communicated with a gas cylinder gas path and used for igniting the combustible gas in the gas cylinder, a radiation panel is arranged on the side, away from the gas cylinder, of the fire grate, and the fire grate is arranged at the tail end of the ignition container and the tail end of the gas cylinder gas path. A heat conduction piece is arranged between the gas cylinder and the fire grate, and a heat conduction path from the fire grate to the gas cylinder is formed through the heat conduction piece. The gas cylinder has the effects of improving the gasification efficiency of liquefied gas in the gas cylinder, ensuring the combustion stability and the heating effect and saving energy.

The application discloses a kind of premixing combustion stabilization method and device of tank furnace, belongs to calcined coke production technical field, using preheated air and cold air mix, participate in volatile combustion, make first layer fireway negative pressure-50~‑20Pa;The eighth layer fireway negative pressure is-180~‑120Pa;Gate negative pressure is-250~‑150Pa;First layer fireway temperature is 1260~1320 ℃;Second layer fireway temperature is 1260~1320 ℃;The eighth layer fireway temperature is 1060~1120 ℃;Exhaust fume temperature is 1040~1100 ℃.The application is by using the method of preheated air and cold air mixing combustion-supporting, maintains the stability of flame distribution in fireway.

The present application belongs to the technical field of aero-engines, and particularly relates to a variable geometry combustion chamber with an adjustable two-stage vortex finder, which can automatically adjust the outlet geometric areas of the middle and outer two-stage swirlers according to the incoming flow temperature, so as to realize the automatic adjustment of the air intake amount at the flame tube head, and realize the variable air intake geometry of the combustion chamber through an adaptive air intake device, so as to ensure the ignition start and combustion stability, and control the combustion temperature in the typical working state, so as to realize low pollution emission. The air intake device mainly comprises an SMA spring with temperature-varying elastic force and a bias spring, which jointly push the cooling structure to change the outlet size of the swirler, and realizes the function of automatically adjusting the air intake geometry of the combustion chamber and adjusting the air intake amount at the head by adapting to the air intake temperature. Compared with the fixed geometry combustion chamber of staged combustion and the variable geometry combustion chamber of active adjustment, the combustion chamber has a simple structure, light weight, low cost and high reliability.

The application discloses an engine combustion control method, and relates to the technical field of engine control, which comprises the following steps: obtaining a current intercooled mixture temperature at an outlet of an intercooler; when the current intercooled mixture temperature is less than a preset temperature threshold, controlling engine coolant to flow into the intercooler through a heating passage to heat the mixture in the intercooler by using the engine coolant; determining a target ignition angle corresponding to the current intercooled mixture temperature from a preset mapping relationship between the intercooled mixture temperature and the ignition angle based on the current intercooled mixture temperature; and controlling an ignition device to perform an ignition action based on the target ignition angle. The application actively heats the low-temperature mixture by using the engine coolant and synchronously corrects the ignition angle, thereby improving the mixture atomization quality and the combustion rate under a low-temperature working condition, improving the combustion stability, and improving the thermal efficiency of the engine.

The application belongs to the technical field of aero-engines, and discloses an aero-engine combustion chamber main combustion stage fuel nozzle and a fuel control method. The aero-engine combustion chamber main combustion stage fuel nozzle comprises a same center axis, a duty class fuel nozzle, a swirler and a main combustion stage fuel nozzle which are sequentially sleeved from inside to outside, and the outlet of the main combustion stage fuel nozzle is sleeved with a sleeve. The fuel control method ensures that the fuel jet flow of the duty class fuel nozzle is unchanged, the swirler rotates around the duty class fuel nozzle, the fuel jet flow of the main combustion stage fuel nozzle is adjusted, and then the total fuel jet flow of the aero-engine combustion chamber main combustion stage fuel nozzle is changed. The fuel control method of the aero-engine combustion chamber main combustion stage fuel nozzle realizes efficient fuel injection under different working conditions, guarantees the combustion efficiency and stability of the combustion chamber, controls the combustion temperature distribution of the main combustion zone, and reduces the pollutant emission of the combustion chamber.

The application discloses a kind of ignition angle control method, device, vehicle and storage medium, the method comprises: determining the target EGR rate and target EGR flow of engine in steady state condition;Based on the speed and load parameters of engine and target EGR rate, determine the modified ignition angle of engine under target EGR rate, and based on the speed and load parameters of engine, determine the basic ignition angle of engine under no EGR rate;Current EGR state of engine is obtained, and according to current EGR state, target EGR flow, modified ignition angle and basic ignition angle, determine the target ignition angle of engine.So, ignition angle can be matched with EGR rate, reach the best control state of engine, improve the combustion efficiency of engine.

The utility model discloses a combustion head of a full-premixing water-cooled combustion engine, which comprises a mounting seat, a combustion head, a water-cooled combustion head and a water-cooled combustion head, and is characterized in that the mounting seat is fixed on a boiler; the water inlet pipe is horizontally arranged above the mounting seat; the water outlet pipe is horizontally arranged below the mounting seat; the first cooling pipe is vertically arranged between the water inlet pipe and the water outlet pipe, and a plurality of layers of cooling fins are arranged on the outer wall of the first cooling pipe. The water-cooling burner has the advantages that the burning temperature of flames is reduced in a water-cooling mode, the radiating fins are arranged, burning gas flows through the radiating fins, a structure similar to a nozzle is formed, the purpose of shortening the length of the flames is achieved, burning is more sufficient and stable, and formation of nitric oxide is reduced.