56results about How to "Prevent backfire" patented technology

The invention discloses a rotational flow micro-mixing nozzle with built-in plasma combustion supporting and a micro-mixing combustor. The rotational flow micro-mixing nozzle comprises a tangential rotational flow part, a fuel pipe and a mixing pipe which are coaxially arranged, and plasma combustion supporting exciters arranged on the fuel pipe and the mixing pipe. The plasma combustion-supporting exciter is integrated in the nozzle, the structural design of the micro-mixing combustor can be simplified, and the size and complexity of the micro-mixing combustor are reduced; the plasma combustion-supporting exciter is installed at the top of the mixed gas channel of the rotational flow micro-mixing nozzle, stable adjustment of the combustion process under the variable working conditions can be achieved by controlling opening and closing and the discharge intensity of the plasma combustion-supporting exciter when the load changes, and meanwhile the response speed under the different working conditions is increased; air or an oxidizing agent can be fully mixed with fuel at a specific rotational flow degree through rotational flow air flow generated by the tangential rotational flow component, the combustion range can be widened, and the stable combustion effect under the extreme working condition is enhanced.

The invention relates to a liquid hydrogen power aircraft, comprising: a liquid hydrogen storage system comprising a liquid hydrogen storage tank for storing liquid hydrogen, a liquid hydrogen pump arranged in the liquid hydrogen storage tank and used for conveying the liquid hydrogen to a liquid hydrogen vaporization device; the liquid hydrogen vaporization device is used for converting liquid hydrogen into normal-temperature high-pressure hydrogen; the fuel conveying and control system is used for conveying the normal-temperature high-pressure hydrogen to the combustion system; the combustion system comprises an engine which is provided with a combustion chamber, and combustion of hydrogen is conducted in the combustion chamber to generate thrust; heat generated during combustion is obtained through an air entraining pipe or an exhaust nozzle to serve as a heat source of the liquid hydrogen vaporization device; and under the action of the heat source, the liquid hydrogen is vaporized after passing through the liquid hydrogen vaporizing device and reaches a combustible state. The liquid hydrogen power system can be used for an aircraft in which liquid hydrogen fuel generates power through combustion, the number of needed devices is small, the overall weight of the liquid hydrogen power system is low, and the reliability of the overall framework of the liquid hydrogen power system is improved.

An internal combustion engine supplying gaseous fuel, in particular hydrogen, comprises, for each cylinder (1), a first intake duct (3A) and a second intake duct (3B) controlled by a first intake valve (VA) and a second intake valve (VB), respectively. In each operating cycle of the cylinder, first only the opening and closing movement of the first intake valve (VA) is activated while the second intake valve (VB) remains closed, and successively only the opening and closing movement of the second intake valve (VB) is activated while the first intake valve (VA) remains closed. According to the present invention, due to the cooling obtained during the opening of the first intake valve, gaseous fuel is directly supplied into the cylinder only from the moment after the first intake valve (VA) is closed and before the second intake valve (VB) is opened, thereby enabling regular combustion without a pre-ignition phenomenon or a tempering phenomenon.

The invention discloses a low-flow hydrogen burner suitable for a solid oxide fuel cell, which comprises a combustion chamber provided with a fan inlet, and the combustion chamber is positioned at the axis and is symmetrically distributed; a primary air pipe, a primary air annular channel, a hydrogen combustion pipe, an annular plate, a hydrogen pore plate, a secondary air annular channel, a secondary air inlet pipe, an air distribution outer annular channel, a round pipe and a blocking plate are arranged in the combustion chamber; the primary air annular channel, the secondary air annular channel and the air distribution outer annular channel are sequentially arranged outwards from the center of a shaft and are provided with a plurality of air nozzles, and combustion is achieved after primary air and secondary air are distributed. A plurality of hydrogen nozzles are formed in the hydrogen pore plate, and fuel is jetted to form jet flow; the nozzle is divided into an inner ring, a middle ring and an outer ring, the diameter of the middle ring is the largest, and the diameters of the inner ring and the outer ring are the same and minimum; air and low-flow hydrogen can be rapidly mixed, combustion is sufficient, and backfire can be effectively prevented. Meanwhile, through reasonable channel air volume distribution, the problem that the air excess coefficient is too large is solved.

The utility model relates to the technical field of gas water heaters, in particular to a fire grate and a burner. Gas channels and air channels which are not communicated with each other are arranged in the fire grate side by side in the width direction, and one air channel is arranged between every two adjacent gas channels. The top end of the fire grate is provided with fire holes corresponding to the fuel gas channels and communicated with the fuel gas channels, the top end of the fire grate is provided with air outlet holes corresponding to the air channels and communicated with the air outlet holes, and the fire holes and the air outlet holes are arranged in a staggered mode in the width direction. The burner comprises the fire grate, fuel gas at the fire holes and air flowing out of the air outlet holes are mixed in a crossed mode, and the mixing effect of the fuel gas and the air is improved. A supplementary channel for supplying air is formed between every two adjacent fire rows, so that the mixing effect of the gas and the air is further enhanced, excessive load concentration is reduced, the occurrence of a local combustion high-temperature area is avoided, the combustion time of the gas is shortened, the combustion efficiency and the combustion stability are improved, and meanwhile the combustion problem of detonation or detonation caused by backfire is avoided.

The utility model relates to the technical field of gas water heaters, in particular to a fire grate and a burner. Gas channels and air channels which are not communicated with each other are arranged in the fire grate in a staggered mode in the width direction, and the air channels are arranged on the two sides of each gas channel. The top end of the fire grate is provided with communicated air outlet holes corresponding to each air channel, and the top end of the fire grate is provided with a plurality of fire holes corresponding to each fuel gas channel along the length direction; every two adjacent fire holes are arranged in a staggered mode in the length direction of the fire row. Fuel gas sprayed out of the fire holes and air flowing out of the air outlet holes in the two sides are mixed in a crossed mode, meanwhile, the multiple fire holes are formed in the length direction in a staggered mode, the contact area of the fuel gas at the fire holes and the air is further increased, the mixing effect of the fuel gas and the air is improved, the combustion time of the fuel gas is shortened, and the combustion efficiency and the combustion stability are improved.

The invention relates to the technical field of flame cutters, and provides a continuous casting machine steel billet flame cutting ignition device which comprises a supporting frame, a supporting seat, a movement mechanism, two welding mechanisms and a cleaning mechanism, the movement mechanism is used for moving along with a steel billet, the two welding mechanisms are arranged on the movement mechanism, and the cleaning mechanism is arranged on the supporting seat. The two welding mechanisms are oppositely arranged, the welding mechanisms are used for welding steel billets, the two cleaning mechanisms are fixedly arranged on the movement mechanism, the cleaning mechanisms are detachably connected with the welding mechanisms, the cleaning mechanisms are used for cleaning the welding mechanisms, the cleaning mechanisms comprise sealing cabins, the sealing cabins are fixedly arranged on the movement mechanism, and the sealing cabins are detachably connected with the welding mechanisms. And an igniter is fixedly arranged on the side, close to the welding gun, of the sealing cabin and arranged on the side of the sealing assembly, and through the technical scheme, the problem that in the prior art, in the working process of a flame cutting device on an existing continuous casting machine, fuel is wasted too much is solved.

The present invention discloses a low-emission swirl burner for a gas turbine and an operating method thereof. The burner comprises a hollow inner cone and an outer cone which are coaxially arranged. A plurality of swirl blades are arranged between the inner cone and the outer cone. A plurality of inner cone fuel spray hole channels penetrating the inner cone wall are arranged on the inner cone wall. An annular blade fuel spray hole channel is also arranged on the inner cone wall. A plurality of blade fuel spray holes are arranged on each swirl blade, and each blade fuel spray hole is connected to the blade fuel spray hole channel. An air channel is formed in the cavity between the inner cone and the outer cone. The fuel nozzle of the burner is designed in two stages. The first stage is the inner cone fuel spray hole channel on the inner cone wall of the burner. When the load is low, the fuel is sprayed out from the inner cavity of the inner cone through the plurality of inner cone fuel spray hole channels, which can stabilize the flame and control the emission. The other stage is the blade fuel spray hole on the swirl blade. When the load is high, the fuel is sprayed through the blade fuel spray hole, mixed with the air and burned under the action of strong swirl, which can reduce the emission of NOx.

A fuel air premixer can prevent tempering and explosion and comprises an air inlet pore plate, a fuel air inlet pore plate, an air outlet pore plate and a fuel air inlet pipe. The fuel air inlet hole plate is arranged on the downstream of the air inlet hole plate, and the air outlet hole plate is arranged on the downstream of the fuel air inlet hole plate. A fuel and air mixing cavity is formed between the air inlet pore plate and the fuel inlet pore plate; a fuel gas collecting cavity is formed between the fuel gas inlet pore plate and the gas outlet pore plate; the air inlet direction of the air inlet holes points to the fuel and air mixing cavity from the upstream side of the air inlet hole plate. The gas inlet direction of the fuel gas inlet hole points to the upstream side of the fuel gas inlet hole plate from the fuel gas collecting cavity; the fuel and air mixing cavity communicates with a plurality of air outlet pipes; the fuel gas inlet pipe is communicated with the fuel gas collecting cavity; the gas outlet pipe penetrates through the fuel gas inlet pore plate and the gas outlet pore plate, and the drift diameter of the gas outlet is smaller than that of the gas inlet. A combustion chamber head includes the fuel air premixer. A combustion chamber includes the combustion chamber head.

The utility model discloses an efficient energy-saving bell-type furnace burner which comprises a fixed machine shell, a front sealing cover is installed on the surface of the front end of the fixed machine shell, a detachable structure is arranged between the fixed machine shell and the front sealing cover, a flame stabilizing disc is installed in the front sealing cover, and a gas inlet is formed in the front sealing cover. A burner head is detachably mounted at the center of the surface of the flame stabilizing disc, and multiple stages of rotational flow blades are mounted in the air inlet pipeline. The components of the furnace burner are conveniently assembled and designed, so that the burner head is positioned inside the sealing front cover, a good windproof protection effect is achieved, meanwhile, a multi-stage rotational flow structure is designed, air and fuel gas respectively generate strong rotational motion through the multi-stage rotational flow blades after entering the burner, and the burner head is prevented from being blocked by the multi-stage rotational flow blades. Air and fuel gas can be mixed more sufficiently, the combustion efficiency is improved, the flame stabilizing disc is arranged in the combustor, combustion of flames can be stabilized, flame blow-off or backfire is prevented, and stability and safety in the combustion process are ensured.

The present invention discloses a swirl micro-mixing nozzle and a micro-mixing burner with built-in plasma combustion-supporting. The swirl micro-mixing nozzle includes a coaxially arranged tangential swirl component, a fuel pipe and a mixing pipe, and a plasma combustion-supporting exciter arranged on the fuel pipe and the mixing pipe. The present invention integrates the plasma combustion-supporting exciter inside the nozzle, which can simplify the structural design of the micro-mixing burner and reduce the volume and complexity of the micro-mixing burner; the present invention installs the plasma combustion-supporting exciter on the top of the mixed gas channel of the swirl micro-mixing nozzle, and can control the opening and closing and discharge intensity of the plasma combustion-supporting exciter when the load changes, so as to achieve stable regulation of the combustion process under variable working conditions and improve the response speed under different working conditions; the present invention uses the swirl airflow generated by the tangential swirl component to make the air or oxidant fully mixed with the fuel at a specific swirl degree, which can widen the combustion range and enhance the stable combustion effect under extreme working conditions.

The invention provides a liquid hydrocarbon fuel hydrogen-doped multi-stage radial swirl nozzle and a mixing combustion method thereof. The liquid hydrocarbon fuel hydrogen-doped multi-stage radial swirl nozzle comprises an aviation kerosene centrifugal nozzle; the venturi tube and the aviation kerosene centrifugal nozzle are coaxially arranged, and an outlet of the venturi tube forms a nozzle outlet; the radial swirlers are arranged on the radial outer side of the aviation kerosene centrifugal nozzle, and each radial swirler comprises a radial channel and an axial channel which are communicated with each other; a plurality of swirl vanes in an annular array are arranged in the radial channel; the radial channel, farthest from the nozzle outlet, of the radial swirler is communicated with the hydrogen injection holes, and the hydrogen injection holes are arranged in an annular array around the central axis of the radial swirler; and the farther the radial channels in the radial hydrocyclones are away from the nozzle outlet, the closer the axial channels corresponding to the radial channels in the radial hydrocyclones are to the central axis of the radial hydrocyclones. And the adaptability with a traditional aero-engine combustion chamber is good.

The invention discloses a high-speed low-temperature spraying gun with a fuel premixing structure and a system of the high-speed low-temperature spraying gun, and belongs to the technical field of material surface modification and coating. The spray gun comprises a powder feeding needle, the powder feeding needle is sleeved with a pre-premixing air distribution unit I and a pre-premixing air distribution unit II, the end of the powder feeding needle penetrates through a premixing common porous catalytic ceramic plate and is communicated with a combustion chamber, and a premixing interlayer is arranged between the pre-premixing air distribution unit II and the premixing common porous catalytic ceramic plate; a fuel gas channel and a powder feeding needle-compressed air channel are arranged in the pre-premixing air distribution unit I, and the powder feeding needle-compressed air channel is arranged on the periphery of the powder feeding needle; an air and gas inlet and a compressed air channel are arranged outside the pre-premixing air distribution unit I; the compressed air channel is communicated with the air inlet, the powder feeding needle-compressed air channel, the premixing interlayer and the outer wall of the combustion chamber; and the fuel gas channel is communicated with the fuel gas inlet and the premixing interlayer. The spray gun can keep flame flow stable, reduce the temperature of particles and inhibit oxidation and decomposition of the particles.

The utility model discloses an eccentric fireproof mechanism suitable for a biomass boiler feeder, which comprises a bin body, a movable baffle assembly, an impeller material shifting assembly and a driving assembly, the bin body is arranged between a feeding conveyor and a boiler, the upper end of the bin body is in butt joint with a discharge port of the feeding conveyor, and the impeller material shifting assembly comprises a main shaft rotationally arranged in the bin body. The movable baffle assembly comprises a baffle rotating shaft rotationally arranged in the bin body, an arc-shaped baffle fixedly connected with the baffle rotating shaft, a connecting rod with one end fixed to the back face of the arc-shaped baffle and a balancing weight hung at the other end of the connecting rod. The balancing weight drives the lower end of the arc-shaped baffle on the baffle rotating shaft to abut against the outer edge face of the impeller rotor. Elastic sealing is achieved between the arc-shaped baffles and the impeller blades, materials are not prone to being clamped, and work is reliable.

The utility model relates to the technical field of phosphorus chemical industry, in particular to a phosphate ore drying machine with an anti-explosion safety ignition system. A phosphate ore drying machine with an anti-explosion safety ignition system comprises a drying roller (1), a rotating motor (2), the anti-explosion safety ignition system (3), a start button (4), a stop button (5), an alarm (6) and a controller (7). The anti-explosion safety ignition system (3) comprises a phosphorus furnace tail gas supply pipe (8), a safety water seal (9), a phosphorus furnace tail gas inlet pipe (10), a combustion-supporting air inlet pipe (11), an electronic igniter (12) and an oxygen supply fan (13); a phosphate ore discharging pipe (14), a phosphorus furnace tail gas inlet pipe (10), a combustion-supporting air inlet pipe (11) and an electronic igniter (12) are arranged at the feeding end of the drying roller (1); and a flame detector (18) is arranged above the combustion-supporting air inlet pipe (11). The drying device is simple in structure, easy and convenient to operate, high in drying efficiency, safe and explosion-proof.

The invention discloses a diagnostic device for preventing backfire of a hydrogen engine. The diagnostic device comprises the hydrogen engine, the hydrogen engine is provided with an air cylinder, a front air inlet pipe connected with the air cylinder, a throttle valve and a hydrogen injection valve which are arranged on the front air inlet pipe, an exhaust pipe connected with the air cylinder, and a turbocharger arranged on the exhaust pipe; and a throttle valve front pressure sensor and a throttle valve rear pressure sensor are respectively arranged in front of and behind the throttle valve. According to the diagnosis device and the protection method for preventing backfire of the hydrogen engine, the throttle valve front pressure sensor and the throttle valve rear pressure sensor are arranged in front of and behind the throttle valve respectively, the gas pressure difference value in front of and behind the throttle valve is monitored so as to diagnose backfire of the hydrogen engine, and the risk of backfire is judged; and after diagnosis is completed, corresponding tempering protection modes are adopted according to different triggering conditions, the gas pressure difference between the front portion and the rear portion of the throttle valve is adjusted, the tempering risk is reduced, and protection for preventing tempering of the hydrogen engine is provided.

The utility model discloses an air inlet sub-cavity anti-backfire gas engine cylinder cover, which relates to the field of engines and comprises a cylinder cover body, an air inlet valve and an air outlet valve are respectively arranged on two sides of the bottom end of the cylinder cover body, and combustion chambers matched with the bottom of the cylinder cover body are arranged at the bottom ends of the air inlet valve and the air outlet valve. A spark plug mounting pipe is arranged in the middle of the top of the combustion chamber; a first sealing assembly is arranged in the spark plug installation pipe. A plurality of camshaft seats are arranged on the inner side of the top end of the cylinder cover body, and valve guide pipes are arranged on the two sides of each camshaft seat. A second sealing assembly is arranged on the outer side of the top end of the cylinder cover body, first limiting holes are formed in the periphery of the top of the cylinder cover body, and limiting blocks matched with the cylinder cover body are arranged at one ends of the outer sides of the first limiting holes. Under the matching action of the first sealing assembly and the second sealing assembly, the sealing performance of the cylinder cover is effectively improved, and the tempering phenomenon of the air inlet sub-cavity caused by abnormal pressure or temperature is avoided.

The invention relates to an anti-deflagration and anti-explosion surface combustion gas burner (1). The burner is characterized in that it comprises a burner body (2) perforated by a series of apertures (21), each aperture extending through a rim (22), these apertures (21) being arranged in rows (24) of aligned apertures (21), and a gas distributor (5) comprising a distributor body (50) equipped with a plurality of longitudinal gas distribution branches (52), each branch (52) is perforated by a series of apertures surrounded by a rim (59). Furthermore, the distributor body (50) is located inside the burner body (2) such that each orifice of the distributor body (50) is coaxial with the orifice (21) of the burner body (2) such that air and gas mix only at the rim (22) of the burner body (2) when the burner body (2) is coupled to an air supply and the distributor body (50) is coupled to a gas supply.

The utility model discloses a hydrogen-burning fuel gas backflow stable-burning premixing condensing boiler which comprises a lower box body and an upper box body, a water cooling wall is communicated between the lower box body and the upper box body, a plurality of water cooling pipes I are arranged in an air inlet, a flow guide frame body is fixedly connected outside the water cooling pipes I, a plurality of water cooling pipes II are arranged on the downstream of the water cooling pipes I, and the water cooling pipes II are communicated with the upper box body. The second water-cooling pipes are located on the downstream of the first gas channel, second gas channels are formed between the second water-cooling pipes and the adjacent flow guide frame bodies, third gas channels are formed between every two adjacent second water-cooling pipes, a plurality of third water-cooling pipes are arranged on the downstream of the second water-cooling pipes, and a plurality of fourth water-cooling pipes are arranged on the downstream of the third water-cooling pipes. A fin is fixedly connected between the water-cooling pipe II and the water-cooling pipe III, and a water-cooling pipe group I, a water-cooling pipe group II and a water-cooling smoke barrier wall are sequentially arranged in the tapered hearth from upstream to downstream. According to the burner, flame combustion is more stable, meanwhile, the high-temperature flame is cooled, tempering is prevented, and generation of nitric oxide is reduced.

The utility model discloses a totally closed biomass boiler relates to boiler technical field, including boiler body, feed pipe, connecting shaft, base and second blast pipe, boiler body top is connected with the top cover through bolt, the top of top cover is welded with the smoke vent, the bottom of smoke vent is communicated with device main part inside, and the second blast pipe is connected with the top cover. The bottom of the device body is connected with the top of the combustion chamber, when the boiler is used, feeding is carried out through the inclined feeding pipe, in order to prevent tempering of the combustion chamber when fuel is added, a baffle is arranged at an outlet of a channel of the feeding pipe and is in a hanging state, and when the combustion chamber is tempered, under the action of the positive pressure of smoke of the combustion chamber, the baffle is in a closed state. And the baffle is pushed to be attached to the outlet end of the feeding pipe, so that the outlet end of the feeding port is closed, the tempering phenomenon of the feeding pipe during feeding is avoided, and the use safety of the boiler is improved.

The application relates to a gas stove and a burner thereof. The burner comprises an ejector pipe group and a damper end plate. The ejector pipe group has an air inlet end and an air outlet end, and a booster hole is arranged in the side wall of the ejector pipe group close to the air inlet end; the damper end plate is arranged at the air inlet end of the ejector pipe group, and a primary air inlet hole and a gas hole are arranged in the damper end plate. External air can be sucked into the ejector pipe group through the booster hole and the primary air inlet hole at the same time, the booster hole is used for increasing the air intake amount, facilitating further promotion of combustion, improving the combustion efficiency and reducing the CO emission amount. The booster hole is arranged in the side wall of the ejector pipe group close to the air inlet end, and the primary air inlet hole is arranged on the damper end plate, that is, the air flow direction of the air entering from the booster hole is different from the air flow direction of the air entering from the primary air inlet hole. Therefore, when the two air flows flow into the ejector pipe group at the same time, the two air flows collide and mix, the air and the gas are fully mixed, the combustion efficiency is improved, and the CO emission amount is reduced.

The invention relates to the technical field of combustors, and particularly discloses an infrared combustor which comprises a frame body, a combustion-supporting gas supply part, a gas supply part and an infrared combustion part. The frame body comprises a bearing part and a gas injection part arranged on the bearing part, and a plurality of premixed gas injection openings are formed in the gas injection part; combustion-supporting gas flow channels and fuel gas flow channels which are in one-to-one correspondence with the premixed gas injection openings are formed in the bearing part and the gas injection part; combustion-supporting gas in the corresponding combustion-supporting gas flow channels and fuel gas in the fuel gas flow channels are mixed at the premixed gas injection openings and then are injected out; the combustion-supporting gas supply part and the gas supply part are arranged on the bearing part; the infrared combustion part is arranged on the bearing part and surrounds the gas injection part, an arc-shaped combustion face is arranged on the infrared combustion part, and premixed gas is injected to the arc-shaped combustion face from the premixed gas injection opening at a preset angle. The infrared burner is high in heating efficiency and low in backfire risk, low-temperature combustion-supporting gas can exchange heat with the frame body, and the stability of the frame body is improved.

This application relates to the technical field of alcohol-based fuel burners, and proposes an alcohol-based liquid fuel burner, including a body, a combustion chamber fixed at the front end of the body, and a mixing chamber disposed between the body and the combustion chamber. The mixing chamber is used to fully mix liquid fuel with air. The mixing chamber is connected to the combustion chamber, and an air inlet pipe for supplying air and a spraying device for spraying liquid fuel are disposed within the mixing chamber. The spraying device is rotatably connected to the mixing chamber, and an airflow driving device for driving the spraying device to rotate is disposed within the air inlet pipe. The beneficial effects of this application are: by setting a mixing chamber before the combustion chamber, and fully mixing air and liquid fuel within the mixing chamber before combustion, the fuel and air are thoroughly mixed before combustion, which improves the fuel utilization rate of the burner.

The utility model relates to the technical field of gas water heaters, in particular to a fire grate and a burner. Gas channels and air channels which are not communicated with each other are arranged in the fire grate in the width direction, communicated fire holes corresponding to the gas channels are formed in the top end of the fire grate, communicated air outlet holes corresponding to the air channels are formed in the top end of the fire grate, and each fire hole corresponds to at least one air outlet hole. And each air outlet hole faces the adjacent fire hole. The burner comprises the fire grate, and air in the fire grate air channel directionally flows to the adjacent fire holes through the air outlet holes facing the fire holes, so that fuel gas sprayed out of the fire holes and the air provided by the adjacent air outlet holes are mixed in a crossed mode. And meanwhile, a supplementary channel for supplying air is formed between the adjacent fire rows, so that the mixing effect of the fuel gas and the air is further enhanced, excessive load concentration is effectively reduced, the occurrence of a local combustion high-temperature area is avoided, the combustion time is shortened, and the combustion efficiency and the combustion stability of the fuel gas are improved.

The invention discloses a center-staged low-emission combustion chamber head with an efficient anti-backfire structure, and belongs to the technical field of low-emission combustion chamber heads. Comprising a pre-combustion stage part, a main combustion stage part and an anti-backfire structure located between the pre-combustion stage part and the main combustion stage part. Fuel oil in the pre-combustion-stage component is ejected out through a pre-combustion-stage centrifugal nozzle, so that a solid conical atomization field is formed; fuel oil in the main combustion stage component is injected into a main combustion stage annular channel through a main combustion stage transverse fuel oil direct injection hole to form an annular atomization field, and combustible premixed oil gas is formed after the fuel oil is mixed with air in a main combustion stage first-stage radial swirler. The anti-backfire structure provides an anti-backfire air wall for the interior of the main combustion stage annular channel, an output port of the anti-backfire air wall is located on the inner wall face of the main combustion stage, the included angle between the output port and the inner wall of the main combustion stage on the outlet side of the main combustion stage annular channel is an acute angle, and the output port and the inner wall of the main combustion stage are used for preventing main combustion stage flames from extending towards upstream premixed oil gas. The tempering phenomenon is efficiently prevented, and therefore potential safety hazards caused by tempering are prevented.

A full-premixing surface combustion engine is provided with a PLC control unit and a PID controller, expected oxygen content data are set through the PLC control unit and transmitted to the PID controller, an oxygen content analyzer is further arranged, the oxygen content analyzer extracts air around a combustion head, analyzes the oxygen content and transmits the information to the PID controller, and according to the oxygen content information, the combustion head is controlled by the PLC control unit. And the PID controller transmits a signal to the air blower, controls the rotating speed of the air blower and adjusts the amount of blown air, so that the effect of full premixing is realized. Due to the fact that full-premixing fuel gas oxygen supply is sufficient, flame burning around the burning head does not need to stretch like the outside to obtain oxygen, the situation that the flame is attached to the surface of the burning head for burning is shown, the flame is uniform, generation of nitric oxide is reduced, generation of carbon monoxide is avoided, and the energy utilization rate is increased.

The utility model relates to the technical field of biomass energy-saving furnaces, in particular to an anti-backfire structure of a biomass energy-saving furnace, which comprises a fuel bin, a feeding end of a conveying mechanism is arranged at the bottom of the fuel bin, a transition bin is arranged at a discharging end of the conveying mechanism, a discharging pipe is arranged at the bottom of the transition bin, the discharging pipe is arranged in an air chamber in a penetrating manner, one side of the air chamber is connected with a fan, and the other side of the air chamber is connected with an air outlet. A gas material pipe is arranged on the other side of the gas chamber, the gas material pipe and the discharging pipe are coaxially arranged, and the outlet end of the gas material pipe is arranged in the combustion chamber. The fuel bin achieves automatic feeding of biomass fuel into the combustion chamber through the arranged conveying mechanism, the fuel is lifted into the transition bin through the conveying mechanism, the fuel in the transition bin enters the gas material pipe through the discharging pipe and finally enters the combustion chamber, and danger caused by backfire entering the conveying mechanism is avoided through buffering of the transition bin.

The invention discloses an ammonia, hydrogen and natural gas mixed combustion system which comprises a hearth, a combustor, a heat exchanger, a mixer and a storage tank, the combustor and a conical combustion cavity are installed in the hearth, the storage tank is provided with a first branch pipeline through a conveying pipe and connected with the heat exchanger, and the heat exchanger is connected with an inlet of the mixer; an outlet of the mixer is connected with a fuel input port of the combustor; the conveying pipe is provided with a second branch pipeline to be connected with an ejection opening of a first ejector, the first ejector is installed on a smoke recirculation pipe connected with a hearth smoke exhaust pipeline bypass, and the other end of the smoke recirculation pipe is connected with an auxiliary fuel inlet of the combustor. The method has the beneficial effects that the problem of transportation danger of hydrogen is solved, and the ignition performance is improved; the stable ignition and combustion of the ammonia gas are ensured, and the carbon deposition phenomenon is avoided; and the temperature of a combustion area is gentle, and a local high-temperature area is avoided, so that the generation of nitrogen oxides can be reduced.

This invention relates to the field of carbonaceous material reactor technology, specifically to a slag melter, comprising: a combustion aid distribution ring, which is a pipe arranged in a ring around the outer periphery of a discharger; a first pipe connected to the combustion aid distribution ring to introduce combustion aid; a gas-liquid fuel distribution ring, which is a pipe arranged in a ring around the outer periphery of the discharger; a second pipe connected to the gas-liquid fuel distribution ring to introduce gas-liquid fuel; multiple burners connected to both the combustion aid distribution ring and the gas-liquid fuel distribution ring; the multiple burners generate flames and high-temperature flue gas, which, in conjunction with the discharger, agitate, mix, oxidize, heat, and lift inorganic residues to produce molten liquid inorganic residues; this application distributes gas-liquid fuels and combustion aids as needed, fully mixes and combusts them, generates a stable high-temperature flame to agitate the inorganic residues according to operational needs, and adjusts the temperature of the inorganic residues, maintaining the slag level of the inorganic residues and ensuring smooth discharge.

The invention provides a hydrogen fuel orthogonal vortex pair efficient mixing anti-backfire low-pollution burner. The hydrogen fuel orthogonal vortex pair efficient mixing anti-backfire low-pollution burner comprises a petal-shaped fuel nozzle, a partition plate and an air guide plate. Hydrogen fuel is sprayed out through fuel holes formed in a lobe structure of the lobe-shaped fuel nozzle and is intensively mixed with incoming flow air; the premixed gas forms vortex pairs which are the same in size and opposite in direction on the downstream of the tail edge of the lobe, secondary reinforced mixing of fuel and air is achieved along with increasing of the axial distance and the reinforcing and crushing process of the orthogonal vortex pairs, meanwhile, the axial speed of the premixed gas is kept uniform, a low-speed area does not exist, and center tempering can be prevented; and the other part of the air flows through a circular seam between the partition plate and the air guide plate, and the spatial distribution of the combustible mixture and the air is changed at an outlet of the combustor, so that the tempering phenomenon of a boundary layer is prevented. According to the invention, high-efficiency reinforced mixing is realized, emission of nitrogen oxides generated in the combustion process is reduced, thermoacoustic oscillation can be inhibited through parameter differentiation and grading of lobes, and meanwhile, a tempering phenomenon is avoided.