76results about How to "Fully mixed combustion" patented technology

The invention discloses a cyclone reburning method and device for reburning fuel in a cyclone drum for denitration. The device comprises a cyclone drum, a boiler main hearth and a granulating water tank, wherein the cyclone drum and the boiler main hearth are connected seamlessly through a concave outlet of the cyclone drum, overfire air nozzles are distributed at the upper part of the boiler main hearth, and the granulating water tank used for granulating liquid slag is arranged at the bottom of the boiler main hearth. In the invention, since reburning denitration is realized in the cyclone drum, reburnt fuel can stay in a boiler for a longer time; meanwhile, the upper part of the boiler main hearth at the rear part of the boiler has enough space for the distribution of the overfire air nozzles; therefore, the problem that the normal operation of a cyclone furnace boiler is threatened when a conventional reburning technology is adopted is solved very well, and the problems of the reburning technology per se, such as low burn-off rate of reburnt fuel and high smoke temperature of a hearth outlet and the like, can be overcome very well. The method disclosed in the invention not only has high denitration rate, but also uses simple equipment, is convenient and easy to implement, has low cost, is easy in the reformation of a traditional boiler, has remarkable social benefit and can be promoted and applied widely.

The invention discloses a spiral-flow type fluidized bed incinerator which comprises an incinerator body and a cyclone separator. The incinerator body is used for providing combustion space for a fluidized bed, and the cyclone separator is used for recycling insufficiently-combusted ingredients for secondary combustion. At least three layers of secondary air jet orifices are further formed in the walls of the incinerator body and located in a transition zone between a dense-phase zone and a lean-phase zone. The other ends of the secondary air jet orifices are communicated with a secondary air source. The secondary air jet orifices on the same layer are distributed in the walls of the incinerator body. The air flow is spiral so as to enhance transverse mixing of particles and air in the incinerator body and prolong the residence time of the particles in the incinerator body. High-speed secondary air is jetted into the lean-phase zone on the upper portion of an air distribution plate of the circulation fluidized bed incinerator body in a classified manner through wall type tangential firing, so that transverse mixing of particles and air is enhanced, temperature distribution in different areas in the dense-phase zone is more uniform, the combustion efficiency and the desulphurization efficiency are improved, NOx emissions are lowered, the heat transferring is enhanced, and the equipment size is reduced.

The present invention discloses a production technology and device of high-quality calcium oxide, and is intended to address the deficiencies that the calcium oxide produced after calcination of the existing limestone can be easily mixed with ash, underfiring and overburning are common in the calcining process, and the calcium oxide has lower quality. The process is as below: 1, selecting calcite as the raw material, cleaning and draining; 2, crushing the calcite and sieving calcite particles in similar size for standby; 3, sending the calcite raw material into a shuttle kiln for calcining; 4, taking calcium oxide out of the kiln, cooling calcium oxide to about 400 DEG C, and milling the calcium oxide at a temperature more than 200 DEG C; 5, after milling, sending the calcium oxide immediately into a sealed dry container for cooling, cooling to around 50 DEG C, and packaging immediately, wherein the time interval between taking calcium oxide out of the kiln and packaging is 30 min.

The invention discloses a smoke purifying and waste heat utilizing system of a waste incineration power plant. The smoke purifying and waste heat utilizing system comprises an incinerator body, a steam turbine, a power generator, a smoke purifying treatment device and a smoke discharge chimney. The smoke purifying treatment device comprises a pipeline combustor, a steam generator, a waste heat recoverer, a smoke decomposer, a washing tank and an adsorption purifier which are sequentially arranged from a high-temperature smoke outlet and the smoke discharge chimney. The smoke discharge pipe isarranged between the pipeline combustor and the steam generator. A particle collecting pipe is arranged on the lower side of the smoke discharge pip. A spiral smoke pipe is arranged in the steam generator. A heat pipe is arranged in the waste heat recoverer. An outer cylinder, an inner cylinder and a decomposition ball are arranged in the smoke decomposer. An inner electrode is arranged on the inner side of the inner cylinder. An outer electrode is wound on the outer surface of the outer cylinder. A washing pipe is arranged in the washing tank. The adsorption purifier is filled with adsorptionfiller. By means of the system, the combustion state is improved, combustion efficiency is improved, the dioxin content is reduced, and the waste heat recovery efficiency is improved.

The invention discloses an air single regenerative burner, which comprises a burner brick (1) and a burner mounting plate (2). A burner shell (3) is arranged on the burner mounting plate (2); a heat accumulator (4) is arranged in the burner shell (3); a secondary air pipeline (5) leading to a hearth is arranged on the burner shell (3); a gas pipeline (6) is arranged outside the burner shell (3); the tail end of the gas pipeline (6) is inserted into the burner brick (1); a primary air pipeline (7) is arranged in the gas pipeline (6); and the gas pipeline (6) and the primary air pipeline (7) can also be arranged in the burner shell (3). The air single regenerative burner of the invention can fully burn fuel in industrial furnaces and kilns so as to reduce the generation of NOX, save energy and protect environment, can effectively prevent backfire in the gas pipeline and has good safety.

The invention discloses a high-power heat exchange burner for an industry kiln stove. The high-power heat exchange burner for the industry kiln stove is characterized by being mainly composed of a heat exchanger (1), an air inlet pipe (4), a combustor (3), a mixer (2) and a main gun (6), the heat exchanger (1) is provided with an air channel and an exhaust gas channel, the air inlet pipe (4) is arranged on the heat exchanger (1) and communicated with the air channel of the heat exchanger (1), the combustor (3) is communicated with the air channel of the heat exchanger (1) and the air inlet pipe (4), the mixer (2) is arranged in the combustor (3), and the main gun (6) is communicated with the mixer (2) and used for conveying fuel gas. The heat exchanger and the burner are integrated, the high-power heat exchange burner is suitable for fuel media such as natural gas, coke oven gas and producer gas, preheated combustion air and fuel gas can be fully mixed and burnt in the combustor after being mixed, and the maximum burning power reaches 4000 KW and is more than twice that of a traditional burner.

The invention relates to a device with an annular cold air low-heat-storage quick start ignition and combustion system. The device is characterized in that an ignition and combustion device is composed of a combustor body and an ignition device of which an ignition end extends into the combustor body, wherein the ignition and combustion device is arranged in a combustion air duct; the combustion air duct is connected with an air supplementing duct and an air distribution duct; the air supplementing duct is provided with an adjusting damper; a communicating chamber is provided with an expansion joint; a thermal fire-proof layer is arranged outside the device with the annular cold air low-heat-storage quick start ignition and combustion system. In an ignition starting process of a boiler, primary hot air volumes of the air supplementing duct and the air distribution duct are adjusted through the adjusting damper, so that hot air and fuel are fully mixed and combusted and the combustion efficiency is improved; the purposes of low oil consumption and quick start of a circulating fluidized bed boiler are reached by reducing the lengths of the ducts, reducing the using amount of the thermal fire-proof material and reducing the heat storage capacity of the ducts.

The invention provides a 3D printing method for a metal combustion chamber of a civil rocket engine. The 3D printing method includes the steps that a, the placement manner of the combustion chamber and the adding margin of the bottom of the combustion chamber are determined, then operation is conducted according to a printing program of a metal combustion chamber part STL file, and a layer of metal powder of an engine combustion chamber material is pre-laid on a base plate used for printing; b, a laser with first set energy is transmitted so that the bottom, with double feeding runners, of themetal combustion chamber of the engine can be formed; c, a laser with second set energy is transmitted, and forming connection of a bottom grid shape is achieved; d, a laser with third set energy istransmitted so that the inner and outer surfaces of all the structures of the combustion chamber of the engine can be smooth; and e, after smelting of a preference zone of the previous layer of metalpowder is over, powder with the same thickness is laid continuously, and operation is conducted continuously according to the sequence till the operation is completed according to the printing programof a metal combustion chamber part STL file. By means of the 3D printing method, the rocket engine combustion chamber better facilitating heterogeneous fuel mixed combustion can be manufactured, andthe inner and outer surfaces of the structures are smooth.

The invention discloses a mechanical grate type garbage gasifying and incinerating system and a cyclone combustor. A cavity of the cyclone combustor comprises a conical slag outlet, a combustion channel, a V-shaped conical channel, an annular smoke channel and an annular draught flue, wherein the conical slag outlet, the combustion channel and the V-shaped conical channel are arranged from bottom to top; the annular smoke channel and the annular draught flue surround the V-shaped conical channel from top to bottom; a cyclone combustor inlet is formed in the lower end of a side wall of the combustion channel in the tangential direction; the ventilating area of the annular smoke channel is gradually reduced from top to bottom; the upper end of the annular smoke channel communicates with the upper end of the V-shaped conical channel; a tangential smoke outlet is formed in the side wall of the cyclone combustor and communicates with the annular draught flue; and an annular ash discharge opening is formed in the lower end of the annular draught flue. The cyclone combustor has relatively high dust removal efficiency and combustion efficiency and relatively high heat recycling efficiency; controlled combustion and controlled collection can be realized; heat loss is reduced; and emission of pollutants can be reduced effectively.

The invention discloses a lower feeding biomass smokeless multi-purpose furnace capable of directly combusting crushed straw. The lower feeding biomass smokeless multi-purpose furnace comprises a furnace body, a movable combustion barrel arranged in the furnace body and a lower feeding mechanism supplying materials into the combustion barrel through the bottom of the combustion barrel. A lower feeding spiral feeder is arranged at the bottom of the furnace body. Biomass crushed materials in a storage hopper are spirally conveyed into the combustion barrel from the bottom of the combustion barrel to be combusted, coking generated at the bottom of the combustion barrel after the biomass crushed materials are combusted is crushed along with the bottom feeding process, and the problems that due to coking, oxygen supply is insufficient and combustion is insufficient are solved. An arch breaking device simple in structure is arranged in the storage hopper, and biomass material crushing and leaking are continuous and smooth. The lower feeding biomass smokeless multi-purpose furnace is reasonable in structure and suitable for smokeless combustion of various kinds of biomass fuel, fuel is combusted sufficiently, the thermal efficiency is high, and the smoke pollution is reduced. The lower feeding biomass smokeless multi-purpose furnace can be applied to family cooking, heating of industries and shops and heating of greenhouses and the cultivation industry and can also be used for small industry drying.

The invention discloses a boiler which comprises a combustor, an air supplying device, a smoke discharging device and a coal feeding device. A smoke duct of the smoke discharging device and the coal feeding device are both communicated with the combustor, the air supplying device comprises an air feeder and an air supplying pipe, and the two ends of the air supplying pipe are communicated with the air feeder and the combustor respectively. The boiler further comprises a microwave chamber formed in the lateral portion of the combustor and used for delivering microwaves to the combustor, and the microwave chamber comprises a magnetron, a microwave chamber body and a microwave output window installed on the microwave chamber body. Due to the fact that the microwave chamber delivers the microwaves to the combustor, a large amount of heat is released, coal can be dry through microwave combustion supporting, the utilization rate of the coal can be improved, and resource waste caused by coal gradual discharging is avoided. According to the microwave combustion supporting principle, coal graduals and hot air in the combustor are disturbed through the microwaves to be sufficiently mixed and combusted, sulfur oxide corrosion, nitrogen oxide generation and coal gradual discharging are avoided, environment pollution is reduced, and therefore according to the boiler, the environment pollution can be reduced while resource waste is reduced.

The invention provides a solid waste decoupling combustion device, a solid waste decoupling combustion system device and a combustion method of the solid waste decoupling combustion device. The combustion device comprises a shell, wherein the interior of the shell is divided into a feeding combustion channel, a flue gas mixed combustion channel and a flue gas afterflame channel which are sequentially communicated through partition plates in the material flowing direction, and the feeding combustion channel is divided into a preheating drying area, a pyrolysis gasification area, a semi-coke area and a burnout area in the material flowing direction; an air distribution device is arranged below the feeding end in the feeding combustion channel, and vent holes are formed in the outer wall of the side, close to the preheating drying area and the pyrolysis gasification area, of the air distribution device; at least one deflection baffle is arranged in the flue gas afterflame channel, and a rotary deflection flue gas flow channel is formed in the flue gas afterflame channel through the deflection baffles; and an air-smoke heat exchanger is arranged in the flue gas afterflame channel close to the outlet. Through the reasonable flue and air distribution design and the optimized combustion process, materials are fully combusted, and the combustion device has the advantages of being compact in structure, small in pollutant emission and the like.

The invention provides a novel pulverized coal nozzle and a pulverized coal feeding mode. A pulverized coal inlet is formed on the pulverized coal nozzle, a channel of the pulverized coal inlet is tangential to the outer wall of a pulverized coal channel, and the included angle between the nozzle and the center line of the pulverized coal channel is 68 degrees; two reinforcing steel bars are parallely arranged in the pulverized coal channel, so that a cyclone pulverized coal channel is formed in the pulverized coal channel; the two reinforcing steel bars are wound on the inner wall of the pulverized coal channel, the winding angle of the pulverized coal inlet is 35 degrees, and that of the pulverized coal outlet is 60 degrees; pulverized coal and nitrogen rotate forward along the cyclone pulverized coal channel formed between the two reinforcing steel bars to be rotatably sprayed out of the pulverized coal channel at a certain angle, and the pulverized coal sprayed out of the nozzle is still of a certain suspension degree. According to the invention, pulverized coal and an oxidant are fully mixed and combusted, the pulverized coal can be uniformly conveyed into a hearth, and the novel pulverized coal nozzle is stable and reliable to use.

The invention discloses a mechanical grate type garbage gasifying and incinerating system and a combustion chamber with an inverted-cone-shaped cavity. The cavity of the combustion chamber with the inverted-cone-shaped cavity comprises a combustion channel, a conical channel, a fly ash settling chamber, a conical slag outlet, an annular smoke channel and an annular draught flue, wherein the combustion channel, the conical channel, the fly ash settling chamber and the conical slag outlet are successively arranged from top to bottom; the annular smoke channel and the annular draught flue surround the conical channel; the top of the conical channel is small while the bottom of the conical channel is large; the diameter of the fly ash settling chamber is greater than that of the lower end of the conical channel; the annular smoke channel is conical; the top of the annular smoke channel is small while the bottom of the annular smoke channel is large; the lower end of the annular smoke channel communicates with the fly ash settling chamber; the lower end of the annular draught flue communicates with the upper end of the annular smoke channel; and the top of the conical slag outlet is large while the bottom of the conical slag outlet is small. The combustion chamber with the inverted-cone-shaped cavity has relatively high dust removal efficiency and combustion efficiency and relatively high heat recycling efficiency; controlled combustion and controlled collection can be realized; heat loss is reduced; and emission of pollutants can be reduced effectively.

The invention discloses a steel ladle baking device which has an above structure. A rotary connector is omitted, a metal flexible pipe is adopted for connecting an external fuel gas pipeline so as toeliminate a potential safety hazard of gas leakage since the rotary connector is frequently damaged, meanwhile, a thermal insulation layer is added, a specially-designed nozzle is adopted, an originalcombustion fan, an induced draft fan and a heat accumulator are omitted, and the residual heat of a ladle cover is used for heating air. Since fuel gas owns certain pressure, the exhaust inlet of theladle cover generates negative pressure under a function of fuel gas pulling power, external air is automatically sucked into the interlayer channel of the ladle cover, and then, and the external airis preheated to be fully mixed and burnt with the fuel gas in the nozzle.

The invention discloses a self-heating three-section biomass low-tar carbon gas co-production regulation and control device. The device comprises a self-heating fluidized bed pyrolysis reactor, a homogeneous partial oxidation reforming reactor and a fixed bed gasification reactor. The fluidized bed pyrolysis reactor adopts air and water vapor as reaction media; in the partial oxidation reforming section, pure oxygen and volatile components are subjected to a strong partial combustion reaction, a large amount of heat is released, and tar is promoted to be subjected to strong cracking; and biomass coke generated by the pyrolysis section enters the gasification reduction section through a gas locking and material returning device, a small amount of residual tar after the gasification reduction reaction is subjected to deep catalytic cracking through a carbon bed, and the tar content at the outlet of the gasification furnace reaches an extremely low level. According to the invention, agriculture and forestry biomass wastes are converted into high-added-value synthesis gas and biomass activated carbon in a segmented conversion manner, self-heating and large-scale amplification of a gasification furnace pyrolysis process are realized by utilizing directional distribution of a gasification medium, and meanwhile, high-efficiency in-furnace removal of tar is realized.

The invention discloses an alcohol combustion system for gasifying methanol based on waste heat of an engine. The alcohol combustion system comprises a diesel engine, a methanol supply system, a methanol gasification generator, a methanol steam injection system and a control system. The methanol supply system comprises a methanol tank, a filter and a methanol pump which are sequentially connected to the methanol gasification generator through an alcohol-resistant pipeline. The methanol gasification generator is divided into an electric heating gasification part and a waste heat gasification part, each part comprises a methanol atomizing nozzle and a one-way outlet, and gasified methanol is connected with the methanol steam injection system through the outlet. The methanol steam injection system comprises a gas-liquid separator, a gas storage tank, a pressure regulating valve, a methanol gas rail and a methanol steam nozzle which are sequentially connected through an alcohol-resistant heat preservation pipeline. The alcohol combustion system improves the concentration and temperature of mixed gas of methanol and air and improves the low-temperature starting performance of a methanol fuel engine in a manner of atomizing, gasifying and pressurizing methanol. The method has the characteristics of sufficient methanol combustion and high alcohol-diesel ratio.