13results about How to "Improve flame stability" patented technology

This utility model relates to an ammonia fuel regenerative combustion device, belonging to the field of energy conservation and emission reduction. It includes an ammonia fuel regenerative chamber and a combustion-supporting chamber, both connected to the furnace via connecting ports. The ammonia fuel regenerative chamber is equipped with a three-way reversing valve for introducing ammonia fuel and discharging flue gas. The ammonia fuel regenerative chamber contains an ammonia cracking regenerative body, a denitrification reducing agent injector, and a denitrification regenerative body. The porosity of both the ammonia cracking and denitrification regenerative bodies gradually decreases along the flue gas outflow (ammonia inflow) direction. The combustion-supporting chamber has a combustion-supporting gas inlet. The angle of the denitrification reducing agent injector is adjustable. An ammonia cracking catalyst is mounted on the ceramic skeleton of the ammonia cracking regenerative body. An SCR reduction catalyst is mounted on the ceramic skeleton of the denitrification regenerative body. This utility model can improve flame stability, increase ammonia cracking efficiency and denitrification efficiency, and reduce NO₂ levels in the combustion device. x Emissions will be reduced to achieve zero carbon emissions from the heating furnace.

The utility model relates to a combustor and a gas stove. The combustor comprises a furnace end, a gas inlet and a gas outlet, the inner ring fire cover is arranged at the top of the furnace end, and an inner ring fire cavity is formed below the inner ring fire cover; the outer ring fire cover is arranged at the top of the furnace end, and an outer ring fire cavity is formed below the outer ring fire cover; the outer ring fire cover is provided with the outer ring fire seam, the outer ring fire seam is arranged around the center of the outer ring fire cover, the flame stability of outer ring seam fire is good, the flame stability of the combustor can be effectively improved, and the heat efficiency of the combustor is improved. The outer ring fire seam extends upwards in an inclined mode or extends horizontally towards the center of the outer ring fire cover, one port of the outer ring fire seam faces the center of the outer ring fire cover, and the other port of the outer ring fire seam communicates with the outer ring fire cavity; the top face of the outer ring fire cover can cover the top of the end opening, communicated with the outer ring fire cavity, of the outer ring fire gap, dirt can be effectively prevented from entering the fire cavity, and the fire cover is convenient to clean.

This invention discloses a concave cavity flame stabilizer structure, its fuel injection and cooling method, and an afterburner. The structure includes a symmetrical Tesla valve, a fluid oscillator, and shape memory alloy ribs. The Tesla valve is located at the front end of the evaporation chamber of the afterburner, utilizing its unidirectional flow resistance characteristics to suppress fuel backflow caused by pressure fluctuations and ensure stable fuel supply. The fluid oscillator replaces the traditional injection hole, converting the fuel-air mixture into a high-frequency, large-scale periodic swept jet injected into the concave cavity, improving atomization, evaporation, and mixing efficiency. The shape memory alloy ribs are located on the cold side of the bottom and rear wall of the concave cavity, automatically adjusting their shape according to changes in wall temperature to achieve dynamic matching between cooling intensity and heat load. This invention, through the system integration of fuel supply, combustion, and cooling, solves the problems of fuel backflow, low atomization efficiency, and poor adaptability of the cooling system under wide operating conditions in traditional concave cavity structures, significantly improving the combustion efficiency and thermal protection reliability of the afterburner.

The invention relates to the technical field of fire making equipment, and discloses a lighter which comprises a lighter body. The cross section of the fan cover is U-shaped, and the fan cover is installed on the machine body. The flow guide part is positioned outside the air outlet; according to the flow guide piece, a lantern ring is located on the inner side of the fan cover; the at least one spiral blade is located above the side of the air outlet hole, vertically arranged and fixedly connected to the inner side of the lantern ring, the flow guide piece further comprises a flow guide column which is fixedly connected to the machine body, the air outlet hole is located in the inner side of the flow guide column, and a flow guide groove is formed in the bottom of the flow guide column and is in a horn shape; one side of the lantern ring is fixedly connected to the upper part of the flow guide ring; a spiral gas injection mode is adopted, the flame stability is improved, the windproof effect is improved, the gas outlet holes can be shielded and protected, the phenomenon that foreign matter enters is reduced, and the gas injection effect and the follow-up using effect are guaranteed.

The invention discloses an integrated support plate stabilizer with adjustable outer splash-proof atomization. The integrated support plate stabilizer comprises a main support plate, splash-proof wing plates, a main wing side telescopic connecting rod, a flap side telescopic connecting rod and a driving unit. Wherein an oil injection rod is arranged in the main supporting plate and plays roles in supplying oil and stabilizing flame, and incoming flow forms a backflow area behind the tail edge of the main supporting plate and sucks enough fuel oil with better atomization and evaporation effects in a rolling manner so as to organize combustion; the splash-proof wing plates play a role in local rectification and splash-proof reflection of fuel oil sprayed on the side of the main supporting plate, are distributed on the two sides of the main supporting plate, and can dynamically adjust the relative positions of the splash-proof wing plates to the main supporting plate and the angles between the main wing and the flap. According to the integrated supporting plate flame stabilizer, the non-uniformity of spanwise distribution of side spraying oil supply can be improved, meanwhile, the atomization fineness of fuel oil is improved through wall face splash blocking, and dynamic adjustment under the working conditions of different hydraulic-pneumatic fuel ratios can be conducted so that the ignition and flameout combustion performance of the integrated supporting plate flame stabilizer can be fully exerted. The invention further provides an adjusting method of the integrated supporting plate stabilizer.

The invention relates to the technical field of combustion, aims to solve the problem of combustion efficiency, and discloses a carbon-free combustor capable of adjusting fuel mixing degree and flue gas recirculation, which comprises a flame retainer arranged at the center of the combustor, a hydrogen pipe surrounding the flame retainer and an ammonia pipe surrounding the hydrogen pipe, a primary air pipe is arranged outside the ammonia pipe, and a secondary air pipe is arranged outside the primary air pipe. A Venturi mixing pipe is arranged at the top of the primary air pipe, a flue gas inner circulating pipe is arranged outside the Venturi mixing pipe, the flame retainer, the hydrogen pipe, the ammonia pipe and the primary air pipe are coaxially arranged, an inner swirler is arranged in the ammonia pipe, an outer swirler is arranged in the primary air pipe, an inner inserting pipe is arranged on the wall between the ammonia pipe and the primary air pipe, and an outer inserting pipe is arranged on the wall between the outer swirler and the primary air pipe. An inner inserting pipe adjusting device is arranged at the bottom of the inner inserting pipe. The inner-layer hydrogen flame is wrapped by the outer-layer ammonia flame, and the flue gas is circulated, so that the temperature of the central flame is reduced, and the generation of thermal NOx is reduced; and the mixing process of fuel and air is optimized through flue gas internal circulation and Venturi tube design.

The present application relates to the technical field of boiler combustion, and discloses a direct combustion burner and a combustion system, wherein the combustion system directly sends hydrogen-oxygen mixed gas obtained by electrolysis of water into the combustion burner, thereby eliminating investment in purification equipment and energy consumption. The direct combustion burner is provided with a first nozzle and a second nozzle, the first nozzle converges towards the axis of the pulverized coal channel, can heat the core area of the pulverized coal jet, and is favorable for improving the ignition condition; the second nozzle is parallel to the axis of the pulverized coal conveying pipe, forms a wake flow at the periphery of the pulverized coal jet, plays a stable combustion and wrapping heating role, and is helpful to enhance the flame stability. Multiple small-aperture nozzles disperse the hydrogen-oxygen mixed gas into numerous small jets, form a small flame group which is independent and mutually supported, are helpful to control the size of the local high-temperature area and shorten the residence time of the high-temperature flue gas, thereby inhibiting the generation of nitrogen oxides. The hydrogen-oxygen mixed gas is self-provided with oxygen, the combustion process does not consume additional oxygen in the combustion-supporting air, and is helpful to reduce the carbon content of fly ash.

The invention discloses a jacket type ammonia-hydrogen co-combustion heat supply combustor and an operation process thereof. A fuel source is pure hydrogen or ammonia-hydrogen mixed gas. The combustor comprises a premixing cavity, a combustor base, a jacket type cooling structure, a temperature control system, a rotational flow stabilizing device and an ignition device, the jacket type cooling structure is composed of a combustor outer wall and a flame tube with spiral flow guide fins, air flows downwards in a spiral mode, and the combustor has the oxygen supply and cooling functions; the temperature control system regulates and controls air and fuel flow according to temperature through a temperature measuring device, a regulating valve and a controller, the rotational flow stabilizing device is composed of a rotational flow device, a flow guide pipe and a flow guide cover so as to strengthen flame stability, and the ignition device is used for safe ignition. According to the invention, hot tail gas generated by combustion supplies heat to rear-end equipment in a heat exchange manner; the device has the characteristics of high energy utilization rate, few pollutants, compact structure, high adaptability, active cooling of the combustor, stable combustion flame, stable and controllable energy supply temperature and the like.

The afterburner hydrogen-kerosene dual-fuel concave cavity supporting plate flame stabilizer comprises a plurality of supporting plates evenly arranged in an outer culvert casing, concave cavities are formed in the sides, away from gas incoming flow, of the supporting plates, the concave cavities are closed through hydrogen injection pieces, the hydrogen injection pieces are provided with splitter plates stretching into the concave cavities, and the splitter plates are connected with the outer culvert casing. The supporting plate is provided with an air entraining inlet penetrating through the air entraining flow channel and an exhaust outlet penetrating through the exhaust flow channels, the supporting plate is provided with a main combustion stage kerosene injection pipe and an on-duty stage kerosene injection pipe which extend into the air entraining flow channel, and the side of the supporting plate is provided with a low-speed backflow area. The main combustion stage kerosene nozzle is located in a low-speed backflow area. Combustion of double fuels of hydrogen and kerosene in the afterburner is achieved, on one hand, the working efficiency of the gas compressor is improved, and combustion is promoted; on the other hand, kerosene serves as an afterburner on-duty stage, hydrogen serves as a working stage, hydrogen ignition is facilitated, and the afterburner can be stably started.

A pelletized belt roasting burner with an adjustable flue gas recirculation structure is disclosed, relating to the field of burners. The pelletized belt roasting burner with adjustable flue gas recirculation structure includes a burner brick with a Laval channel and a recirculation chamber, and a connecting flange. The Laval channel connects the recirculation chamber and the combustion chamber. A burner core extending into the Laval channel and an air pipe communicating with the burner core are connected to both sides of the connecting flange. The air pipe has a gas pipe connected to it, and a blind flange with an inspection hole is provided. The air pipe and the gas pipe each have an air inlet and a gas inlet, respectively. The burner brick has multiple recirculation channels connecting the recirculation chamber and the combustion chamber, and an ignition tube connecting the recirculation chamber. The burner core is fitted with an adjusting plate that moves axially along the burner core to adjust the cross-sectional area at the connection between the recirculation chamber and the Laval channel, and an adjusting device for driving the adjusting plate. The pelletized belt roasting burner with adjustable flue gas recirculation structure can reduce NO₂ levels. X Emissions are reduced, flame stability is improved, and the hot and cold state adjustment ratio of the burner is increased.

The invention discloses a main flame expansion type low-NOx gas burner nozzle suitable for internal circulation of flue gas, relates to the technical field of combustion equipment, and solves the problem that thermal NOx is generated by gas fuel combustion of a burner due to high flame temperature of the main flame expansion type low-NOx gas burner nozzle. The device comprises a central fuel channel, an air channel and a plurality of main fuel channels, wherein the central fuel channel, the air channel and the plurality of main fuel channels are arranged on a hearth wall; the air channel coaxially sleeves the outer side of the central fuel channel, and the plurality of main fuel channels are uniformly distributed on the outer side of the air channel in a radial circumference manner; the main fuel channel comprises a main fuel inlet channel and a main fuel sleeve, one end of the main fuel inlet channel is connected with the hearth wall, and the other end of the main fuel inlet channel is connected with the main fuel sleeve. And a plurality of main fuel pipe flue gas inlets are uniformly formed in the circumference of the main fuel sleeve. Fuel is input in a dispersed mode through a plurality of channels, meanwhile, smoke is sucked into the fuel channels in an entrainment mode, the flame temperature is reduced, and therefore generation of thermal type nitric oxide is reduced.

The invention relates to a clean, efficient and stable ammonia humidification combustion power generation system and method, and belongs to the technical field of ammonia fuel clean and efficient combustion power generation. The ammonia fuel supply unit is used for providing fuel for the staged combustion chamber unit; the air supply unit is used for providing air for the staged combustion chamber unit; the oxygen supply unit is used for providing oxygen for the staged combustion chamber unit; the water supply unit provides water for the staged combustion chamber unit; the heat recovery unit recovers heat energy of the staged combustion chamber unit; and the staged combustion chamber unit does work to generate power. Water is adopted as a diluent, a humidification strategy far away from a flame root reaction area is adopted, the system mass flow rate is increased, the temperature of a combustion chamber is effectively restrained, the ammonia combustion power generation efficiency is improved, and meanwhile the thermal load of turbine machinery is reduced; ammonia oxygen-enriched on-duty flames are arranged at the roots of ammonia / air main flames, and the ignition characteristic of the ammonia flames and the stability of a power generation system are improved.

The utility model relates to ignition device technical field, and specifically is a kind of high-speed premixing ignition gun suitable for the scene needing efficient, stable ignition. Including ignition gun pipe joint, center gas gun, premixing sleeve pipe, gas interface and combustion-supporting air interface. Compared with prior art, the utility model has the beneficial effects that: by optimizing the premixing mode of fuel and combustion-supporting agent and ignition structure, the ignition efficiency, stability and safety are improved;It is suitable for various industrial combustion equipment, and the application range is wide;Adopt the cyclone disc of new structure, when combustion-supporting air passes through the slot of cyclone disc, it can rotate clockwise, enhance mixed gas turbulence, by improving the mixing degree of combustion-supporting air and gas, the flame stability is improved;Support frame can keep the rigidity of ignition electrode, effectively prevent ignition electrode and center gas gun from small gap at far away from support, strictly control insulation gap, ensure stable combustion.