82results about How to "Efficient and clean combustion" patented technology

The invention provides a combined fuel oil atomizing, evaporating and combusting device for a gas turbine, relates to an air inlet device of the gas turbine, a fuel oil atomizing, evaporating and blending device, and core technology of organized combustion and stable flame, and belongs to the power field of an aeronautic power propulsion system and a ground gas turbine. A nozzle 1 is arranged at a central position of an inlet of a premixing chamber 2; an evaporator 3 is fixed in an inner cavity of the premixing chamber 2; double cyclones 4 are arranged at the inside of the outlet end of the premixing chamber 2 and connected hermetically; a centrifugal nozzle 5 is arranged at a central position of the double cyclones 4; a venturi 6 is welded at a transition position of an outlet of internal and external cyclones of the double cyclones 4; a sleeve 7 is hermetically welded with the outside of an outlet of the premixing chamber 2; and the head of a combustion chamber 8 is hermetically welded with the sleeve 7. Compared with the prior fuel oil combined nozzle, the device has the advantages of improving properties of fuel oil atomizing, evaporating and blending and evenness of oil-gas space distribution, improving combustion performance, shortening flame length and reducing discharge of pollutant, and is a comparatively ideal combined fuel oil atomizing and combusting device for a high-performance gas turbine.

The present invention is the technological process of simultaneously burning solid and liquid fuel in circular fluidized bed boiler. In the boiler, are installed simultaneously granulator for feeding coal water slurry, spiral coal feeder for feeding coal powder, coal gangue powder or coal powder mixture with inflammable garbage, and auxiliary double-fuel feeder. The technological parameters includes coal water slurry pressure of 0.2-0.4 MPa, certain solid/liquid fuel ratio, fluidized bed expansion ratio of 1.5-2.1, operation gas speed of 3-7 m/s, circulation multiplying factor of 6-8, boiling pressure difference of 4500-6000 Pa, and burning temperature of 800-950 deg.c. The burning technological process includes three different cases including that with coal water slurry, that without coal water slurry and that with coal powder mixture; and coal powder adding amount is regulated based on the bed layer height and the furnace temperature mainly.

The invention relates to a combined combustion system of a chain boiler. The combined combustion system comprises a pulverized coal making-pulverized coal conveying system, a smoke recirculating system, an air supply system and a combusting system; and a discharging opening of a coal hopper is divided into two paths, one path is connected with a chain fire grate, the other path feeds coal in the coal hopper into a fan coal mill through a coal feeder, a circulating fan is connected with an induced draft fan through a smoke pumping pipeline, the circulating fan pumps part of smoke from a flue of an induced draft fan outlet via the smoke pumping pipeline to serve as a drying agent of pulverized coal in the fan coal mill, and a coarse and fine pulverized coal separator is connected with a pulverized coal combustor through a pulverized coal conveying pipeline. The system is organically combined with the traditional combined combustion technology, the fuel grading combustion technology and the smoke recirculation technology, the problems that an existing chain boiler is poor in coal type adaptation, low in boiler combustion efficiency, insufficient in performance and slightly high in NOx emission are solved, and the clean, efficient and safe combustion manner is provided for the chain boiler.

The invention discloses a wood stove capable of burning biomass pellet fuel and belongs to the technical field of biomass pellet fuel equipment. The wood stove capable of burning the biomass pellet fuel mainly comprises cookware and a stove chamber, wherein a plurality of fins are distributed on the lower bottom surface of the cookware, a biomass pellet burner is arranged inside a stove wall so as to replace an original grate, a metal reflective surface which is smooth on the surface is installed on the periphery of the top of the biomass pellet burner, the reflective surface is arc-shaped and parallel to the lower bottom surface of the cookware, and the fins arranged at the bottom of the cookware are arranged in a radial mode. The wood stove capable of burning the biomass pellet fuel has the advantages of being simple in structure, easy to construct, convenient to use, and capable of achieving efficient cleaning burning of the biomass fuel, reducing pollution emission, effectively avoiding heat radiation of flames on the stove wall and the ground, improving the utilization rate of flame radiant heat, increasing the heat-absorption surface area of the cookware, improving the rate of utilization of smoke flow heat by the flames and finally enabling heat efficiency of a normal wood stove to reach over 40%.

A porous-medium premixing combustor is provided, which includes: an air-fuel gas mixer, a combustor body, a thermocouple, an ignition electrode, and a detecting electrode. The combustor body includes a casing connected to the air-fuel gas mixer; an outer and an inner burner-block, wherein the outer burner-block and the casing are connected, forming a square chamber, and the inner burner-block is provided inside the square chamber, with a via hole communicating with a pipe; and a mixed gas distributing plate, an ordered porous plate, a small-pore foamed ceramic plate, and a big-pore foamed-ceramic plate sequentially provided along an axis direction of the via hole of the inner burner-block. The thermocouple is provided at the casing and extends into the square chamber. The ignition electrode is provided close to an end of the big-pore foamed-ceramic plate. The detecting electrode is provided close to an exit end of the big-pore foamed-ceramic plate.

The invention belongs to the technical field of engines, and relates to a lean burn engine and an automobile. The lean burn engine comprises a water spraying system and an electric control unit, wherein the water spraying system comprises air flue water sprayers, pressure sensors and a water supply device; the air flue water sprayers are connected with the water supply device through water pipes;the pressure sensors are used for detecting the pressure values of the water pipes and sending the pressure values to the electric control unit; the air flue water sprayers are arranged on air inlet channels of air cylinders of the engine and spray water to the air inlet channels; the electric control unit is in signal connection with the air flue water sprayers and the pressure sensors; and whenthe engine is in different work conditions, the pressure values of the water pipes change, the pressure sensors send corresponding signals to the electric control unit according to the different pressure values of the water pipes, and the electric control unit controls the air flue water sprayers to adjust the water spraying amount. According to the lean burn engine, the electric control unit controls the air flue water sprayers to adjust the water spraying amount according to different engine work conditions (loads), and efficient clean combustion of the engine is achieved.

The invention aims to provide a multi-mode combustion organization method of a natural gas/diesel oil dual-fuel engine. Natural gas used as a low-reaction-activity fuel is injected into a gas channelby a natural gas low-pressure injection system, is preliminarily mixed with air in a gas inlet channel and enters a gas cylinder through a gas inlet valve; diesel oil used as a high-reaction-activityfuel is directly injected into the gas cylinder by a high-pressure common-rail fuel injection system; after the diesel is spontaneously combusted, the mixed gas with the natural gas and the air is ignited so as to supply power to the engine. According to the multi-mode combustion organization method of the natural gas/diesel oil dual-fuel engine, through independent or collaborative control of thehigh-pressure common-rail fuel injection system and the natural gas low-pressure injection system, multi-mode combustion of the natural gas/diesel oil dual-fuel engine can be achieved under differentconditions, so that the engine can operate more flexibly; the problems of difficult cold starting, high emission of low-load THC and high-load knocking can be avoided; and reliable operation and efficient and clean combustion of the engine can be achieved.

The invention discloses a device for reforming fuel at low temperature through exhaust gas residual heat of an engine. The device comprises an engine cylinder and an externally-arranged low-temperature fuel reformer, an air inlet pipe and a fuel sample injection pipe are connected to an inlet of the externally-arranged low-temperature fuel reformer, and the air inlet pipe is provided with a gas flowermeter; a fuel injection pump and a fuel vaporization tank are connected to the fuel sample injection pipe, and an outlet of the externally-arranged low-temperature fuel reformer is provided with a thermocouple and connected with an engine gas inlet pipe through a reforming gas pipe. According to the device, full utilization of the exhaust gas residual heat of the engine is achieved by winding an engine exhaust gas pipe around the externally-arranged low-temperature fuel reformer and the fuel vaporization tank; a low-temperature product obtained after reforming enters the engine gas inlet pipe through the reforming gas pipe and is mixed with fresh air again to form uniform mixed gas, the uniform mixed gas is introduced into the engine cylinder and burnt with fuel directly sprayed in the cylinder in a mixed mode, mixed gas activity and concentration layering is achieved, and due to the fact that a catalyst does not need to be added in the process, the engine can run more efficiently in a better energy-saving mode.

The invention discloses a device for reforming fuel through engine waste gas waste heat in a catalyst-free low-temperature water adding manner. The device comprises an engine air cylinder and an external low-temperature water adding reformer. An inlet of the external low-temperature water adding reformer is connected with an air inlet pipe and a fuel sample inlet pipe. The fuel sample inlet pipe is connected with a fuel injection pump and an evaporation tank. An inlet of the evaporation tank is connected with a water sample inlet pipe. A waste gas pipe passes through the external low-temperature water adding reformer and the evaporation tank through an engine in a wound manner, and engine waste gas waste heat is fully utilized. In the external low-temperature water adding reformer, fresh air and mixed gas of evaporated fuel and water are subjected to low-temperature reforming, a low-temperature product obtained after reforming passes through a reforming gas pipe to enter an engine gas inlet pipe and is mixed with the fresh air again to form even mixed gas to be guided into the engine air cylinder, and the even mixed gas and fuel directly injected in the cylinder are mixed and combusted to achieve mixed gas activity and concentration layering. Due to the fact that a catalyst does not need to be added in the process, the engine operates more efficiently by saving more energy.

The invention discloses a method for constructing a gasoline alternative fuel model and simplifying a mechanism. The method comprises the following steps: determining key components and an adaptationmechanism of a gasoline alternative fuel; systematically simplifying the framework of the single fuel mechanism from the perspective of framework simplification by adopting a directed relation graph (DRG) method, a directed relation graph (DRGEP) method based on error propagation, and a directed relation graph (DRGEPSA) method based on a full substance sensitivity analysis (FSSA) method and coupling error transfer and sensitivity analysis; coupling single fuel mechanisms obtained after respective simplification to obtain a constructed alternative fuel simplification mechanism; and selectingthermodynamic parameters, and comparing and verifying a constructed simplified mechanism model by utilizing comparison of experiments and numerical simulation. The method greatly reduces the sizeof the detailed mechanism, and can achieve efficient and accurate calculation.

The invention discloses a novel gasification counter-heating water boiler, which comprises a boiler shell, a boiler furnace, a fire grate, a coal door, a poke door, an ash door, a smoke channel, a chimney and an automatic control device, and is characterized in that: the coal door, the poke door and the ash door are all visible sealed furnace doors with micro positive pressure, and the novel gasification counter-heating water boiler further comprises a circumferential multipoint air distributing device, a wet desulfurizing dust remover of a built-in pipe burying afterheat recycling device, and a smoke gas afterheat recycling air heater. The novel gasification counter-heating water boiler has the advantages of less equipment investment, low running cost, automated operation, 85 percent of the boiler thermal efficiency, low pollutant discharge and boiler modularization, and can be widely used in places needing small-scale heat supply such as residential houses, bath centers, factories, hotels, government agencies and the like.

The invention discloses a power station system and method for realizing semi-coke low NOx blended combustion through chemical chain air separation. Oxygenation high-temperature reductive combustion, chemical chain air separation and semi-coke preheating system are mainly included, large proportion, low NOx and high-efficiency mixed combustion of a semi-coke low-volatile fuel with coal in a power station boiler can be realized, and the economic and environmental benefits of a power plant are remarkably improved. An optimized metal oxygen carrier is selected, pure oxygen prepared by a chemical chain air separation principle is fed into a hearth through secondary air or a wall type air nozzle, it is guaranteed that excess oxygen coefficient of a main combustion area is lower than 0.8, and a reductive high-temperature oxygenation area is created; a chemical chain air separation device is utilized to obtain high-temperature oxygen-poor air to preheat the semi-coke fuel, the furnace inlet temperature is increased, and the problem of difficult combustion is solved; combustion air adopts high oxygen concentration air or pure oxygen to improve the combustion efficiency of the fuel; and oxygen generated by a reduction reactor is carried by the extraction steam of a steam turbine and is condensed and separated by a low-pressure heater of the power plant, so that the energy consumption ofan air separation system is greatly reduced.

The embodiment of the invention discloses an engine control method and an engine. The engine control method specifically comprises the steps that firstly, current operation parameters of the engine are obtained, an operation condition is determined according to the operation parameters, and a corresponding combustion strategy and a switching strategy are read according to the operation condition;and the engine is controlled to start a first combustion mode according to the combustion strategy. Meanwhile, whether the operation condition of the engine changes or not is detected in real time, and if yes, the engine is controlled to be switched from the first combustion mode to a second combustion mode according to the switching strategy. Obviously, when the operation condition of the enginechanges, stable switching of the combustion modes can be achieved according to the pre-configured switching strategy, so that efficient and clean combustion in the full-condition range is achieved, and the flexibility of combustion process control is improved.

The invention relates to a diesel oil ignition natural gas engine combustion system and a control method thereof. The diesel oil ignition natural gas engine combustion system comprises an engine body,a diesel oil inlet system, a natural gas inlet system, a variable cross-section turbocharger VGT, an exhaust gas recirculation system EGR, a variable valve regulator VVT, a dual-fuel ECU, a comprehensive ECU, a computer and a power source, wherein the exhaust gas recirculation system EGR comprises an EGR intercooler and an EGR valve. According to the system, according to different operation conditions of an engine, accurate control over the fuel gas amount is achieved through strategies of adjusting a gas channel and gas injection of a gas injection valve in a cylinder, mixed gas with different filling amounts and layering states is formed in the cylinder, thermodynamic state control is coupled on the basis, through combined control of the variable valve regulator VVT and the exhaust gasrecirculation system EGR and cooperation of different equivalent ratios, stable ignition and controllable stratified combustion under various working conditions are achieved, the natural gas replacement ratio of a dual-fuel engine is further increased, and efficient and clean combustion within a wider working condition operation range is achieved.

The invention provides a thermodynamic cycle method for a prime mover on the basis of a correct timing constant volume combustion mode. In thermodynamic cycle, a multistage compression interstage cooling process, a countercurrent flow heat exchange process, a correct timing constant volume combustion process and an adiabatic expansion process are included, and thermal energy is converted into mechanical energy in the thermodynamic cycle. Compression power consumption is reduced through the multistage compression interstage cooling process; through the countercurrent flow heat exchange process, enthalpy of working media to be exhausted to the external environment originally is recycled and used for the thermodynamic cycle, and the utilization rate of the thermal energy is improved; through the correct timing constant volume combustion process, long-time uniform low-temperature constant volume combustion is achieved, generation of harmful pollutants such as HC, CO, PM and NOx is effectively suppressed, and meanwhile combustion efficiency is improved; through the adiabatic expansion process, pressure after expansion is approximate to ambient pressure, and work is fully done in an expanding mode. The method provides orientation for design of efficient low pollutant emission and high-performance prime movers in future.

A composite biomass briquette is made up of biomass including stalk or straw, wood leftover, city household garbage and raw coal through crushing, mixing with chlorine fixating agent, sulfur fixating agent and combustion promoter, and hot die pressing. Its advnatages are high compression strength, low combustion point, high combustion efficiency and less environmental pollution.

The invention discloses a municipal sludge-coal water slurry co-fired organic working medium boiler which comprises an air distribution device, a combustion chamber, a vortex separation burnout device and a tail convection heating surface component, wherein the combustion chamber is divided into a dense-phase zone and a dilute-phase zone; the air distribution device is provided with an air distribution plate; vent holes are formed in the air distribution plate; the vent holes are sequentially arranged from the middle to the edge of the air distribution plate, and the areas of the vent holes are gradually reduced; the dense-phase zone is of an inverted landing-shaped structure, and a buried pipe is arranged in a return flow zone of the dense-phase zone; water cooling walls are arranged around the dilute-phase zone; the vortex separation burnout device is arranged at the upper part of the dilute-phase zone; the tail convection heating surface component is arranged at the rear part of the vortex separation burnout device; the organic working medium boiler adopts the municipal sludge-coal water slurry mixed fuel. According to the municipal sludge-coal water slurry co-fired organic working medium boiler disclosed by the invention, the application range of the municipal sludge is widened, and the use cost of the organic working medium boiler is lowered.

The invention discloses a biomass-coal water slurry co-fired organic working medium boiler which comprises an air distribution device, a combustion chamber, a vortex separation burnout device and a tail convection heating surface component, wherein the combustion chamber is divided into a dense-phase zone and a dilute-phase zone; the air distribution device is provided with an air distribution plate; the air distribution plate is of a V shape; vent holes are formed in the air distribution plate; the vent holes are sequentially arranged from the middle to the edge of the air distribution plate, and the areas of the vent holes are gradually reduced; the dense-phase zone is of an inverted landing-shaped structure, and a buried pipe is arranged in a return flow zone of the dense-phase zone; water cooling walls are arranged around the dilute-phase zone; the vortex separation burnout device is arranged at the upper part of the dilute-phase zone; the tail convection heating surface component is arranged at the rear part of the vortex separation burnout device; the organic working medium boiler adopts the biomass-coal water slurry mixed fuel. According to the biomass-coal water slurry co-fired organic working medium boiler disclosed by the invention, the application range of the biomass fuel is widened, and the use cost of the organic working medium boiler is lowered.