113results about How to "Fire stable" patented technology

A combustion technique for water-coke slurry features that a pre-combustion chamber with secondary tangential air inlet, a cyclone burner of primary air at one end of said pre-combustion chamber and a spray gun in the center of cyclone burner for atomizing the water-coke slurry are used. The outlet of said precombustion chamber is communicated to industrial furnace. The temp in the pre-combustion chamber is at least 950-1000 deg.C.

The invention discloses a three-layer secondary air low nitrogen oxide (NOx) swirling burner which comprises a central air pipe as well as a primary air pipe, an inner secondary air pipe, a middle secondary air pipe and an outer secondary air pipe which are concentrically arranged at the periphery of the central air pipe from inside to outside, wherein the air inlets of the inner secondary air pipe, the middle secondary air pipe and the outer secondary air pipe are provided with swirling adjusting mechanisms for generating straightly-flowing secondary air or secondary air with variable swirling intensity by virtue of the respective secondary air pipes; three independent air boxes are sleeved outside each secondary air pipe; and the air volume of each secondary air pipe can be adjusted by air box baffle plate adjusting mechanisms on the air boxes. By adopting the structure of the low NOx swirling burner, the partial grading burning effect of the burner is enhanced and the high temperature smoke reflow is increased, thus finally achieving the aim that the burner burns coals stably and reduces the NOx generated by burning. The three-layer secondary air low NOx swirling burner has a simple structure, is easy to manufacture and install, is high in industrial applicability, is applicable to various coals and guarantees the burning stability and the burning economy of a boiler.

The invention relates to a composite concentration triple-wind-regulating low-NOx cyclone pulverized-coal burner which comprises a central wind passage, wherein a primary wind passage, an internal direct-flow secondary wind passage, an internal rotational-flow secondary wind passage and an external rotational-flow secondary wind passage are sequentially and concentrically arranged at the outer side of the central wind passage from inside to outside, a conical pulverized-coal concentrating device and a star-shaped pulverized-coal concentrating device are arranged in the primary wind passage, and a reversed V-shaped expanded opening and a zigzag axial and radial double concave-convex structured burning-stabilizing device are arranged at the outlet of the primary wind passage; and after primary wind passes through the pulverized-coal concentrating device, an intense standing-vortex burning-stabilizing firing area with obvious circumferential and radial pulverized-coal concentration distribution is formed at the outlet of the burner, and the burning conditions of high-temperature reflow smoke gas and oxygen-deficient rich fuel are generated. The burner has extremely strong firing-stabilizing performance and good coal adaptability and effectively reduces the concentration of nitrogen oxides.

The invention provides an afterburner with an airflow channel designed in a rectifying support plate, the oil and gas mixing degree can be effectively improved, the mixed gas staying time is prolonged, and the combustion efficiency is improved. Airflow from an inner duct and an outer duct is mixed among rectifying support plate flame stabilizers through a sliding baffle type rear duct ejector, airflow enters the support plate from small air inlet holes formed in the surfaces of the two sides of the rectifying support plate flame stabilizers and passes through the airflow channel formed by partition plates, the speed is reduced in the process, fuel oil in fuel oil channels is heated, then the fuel oil is sprayed out towards the center on the back through small air spraying holes formed in the surfaces of the tail flame stabilizers, the fuel oil enters fuel oil channels in the rectifying support plate flame stabilizers through oil supply pipelines, after being heated, the fuel oil is sprayed out through small oil spraying holes connected with the surfaces of the flame stabilizers, the fuel oil is disturbed through multiple strands of airflow, the fuel oil is further heated and mixed with the airflow, and combustion is conducted in a back low-speed backflow area. The fuel oil is good in heating, atomizing and evaporation effect and is disturbed by the airflow, the oil and gas mixing time is long in the low-speed area, accordingly the oil and gas mixing effect is good, and therefore the combustion efficiency can be improved. Meanwhile, ignition and stable combustion can be achieved under the condition of the small oil and gas ratio.

The invention discloses a center-feeding cyclone pulverized coal combustion device adopting a pre-combustion chamber and double-layer jet flow to separate secondary air, and relates to a pulverized coal combustion device, and the center-feeding cyclone pulverized coal combustion device solves the problems that an existing pulverized coal combustion device is high in NOx discharge amount, is poor in flame stability, is severe in slag-bonding and is poor in after-combustion. High-concentration pulverized coal gas flow is conveyed in a primary air tube; a cyclone pulverized coal combustor is arranged at the front end of the pre-combustion chamber; the cyclone pulverized coal combustor and the pre-combustion chamber are coaxially arranged, and each pipeline spray hole of the cyclone pulverizedcoal combustor is flush to the inner wall of the pre-combustion chamber; a plurality of separating secondary air spray holes are distributed at the outer side of the pre-combustion chamber in a double-layer annular mode; a circle on which the centers of each layer of separating secondary air spray holes are located is coaxial with the cyclone combustor; the two layers of separating secondary airspay holes are uniformly crossed with one another; each separating secondary air spray hole is flush to the inner wall of a furnace hearth; and included angles beta between the center lines of the separating secondary air spray holes and the axis of the air tube at each stage of the cyclone combustor are 0-60 degrees. The center-feeding cyclone pulverized coal combustion device is used for an industrial pulverized coal boiler.

The invention provides a dual-injection type turbulent jet ignition pre-combustion chamber device for a spark ignition engine. The dual-injection type turbulent jet ignition pre-combustion chamber device comprises two compression bolts, a fuel injector (3), a gas injector (9), a pre-combustion chamber upper cavity (8), a pre-combustion chamber nozzle (5), a pre-combustion chamber nozzle compression piece (6) and a spark plug (7). The spark plug (7), the fuel injector (3) and the gas injector (9) are fixed in the pre-combustion chamber upper cavity (8), and each of the fuel injector (3) and the gas injector (9) is fixed in the pre-combustion chamber upper cavity (8) through a compression bolt; each compression bolt is provided with a through hole (10), two ends of each compression bolt are provided with threads, one end of each compression bolt is connected with the pre-combustion chamber upper cavity (8) through the threads and used for fixing the gas injector (9) or the fuel injector (3), and the other end of each compression bolt is connected with a gas path or a fuel path; and the pre-combustion chamber nozzle (5) is pressed by the pre-combustion chamber nozzle compression piece (6) and is fixed to the lower end of the pre-combustion chamber upper cavity (8) to form a pre-combustion chamber inner cavity (12).

The invention discloses a two-stage-adjustable steam plasma swirl burner. The two-stage-adjustable steam plasma swirl burner comprises a first-stage plasma ignition device, a second-stage plasma adjuster and a steam supply system. The first-stage plasma ignition device comprises a primary air pipeline, an internal combustor, a rich-lean separator, a swirl generator, a first-stage steam inlet pipeline, a central air pipeline and a first-stage plasma generator. The second-stage plasma adjusting device comprises a second-stage steam inlet pipeline, a second-stage plasma generator, an internal secondary air inlet pipeline and an external secondary air inlet pipeline. The two-stage-adjustable steam plasma swirl burner solves the problems that combustion is hardly stable and the NOx pollutant emission is high, is especially suitable for meager coal, smoke-free coal and the coal which is difficult to ignite and generates a large amount of NOx pollutants and has the effects of being low in nitrogen and stable in combustion.

The invention discloses a boiler tail exhaust gas heat utilization system which comprises multiple stages of preheaters with the progressively-increasing and mixed temperatures and a coal economizer. The preheaters are communicated with the coal economizer through a flue. The boiler tail exhaust gas heat utilization system further comprises a secondary flue (13) penetrating through all the preheaters. Some heat of boiler tail exhaust gas is absorbed by the coal economizer, and the rest of the heat is totally used for heating primary air and secondary air entering a boiler, so that the boiler efficiency is improved by 0.5%-2%, and the coal consumption is lowered.

The invention discloses a small-size precombustion chamber for an engine. The small-size precombustion chamber for the engine comprises a precombustion chamber body (1), wherein a primary cyclone (2), a secondary cyclone (3), an oil spray rod (4) and an ignition electric nozzle (5) are arranged in the precombustion chamber body (1), the ignition electric nozzle (5) is vertically arranged on the center line of the primary cyclone (1) and the secondary cyclone (2), the oil spray rod (4) is inserted into an oil inlet passage communicated with the primary cyclone (2), the primary cyclone (2) comprises a worm case (2-1) and a cyclone blade (2-2), the secondary cyclone (3) comprises a worm case (3-1), a cyclone blade (3-2) and a Venturi pipe (3-3), and the rotating directions of the cyclone blade (2-2) and the cyclone blade (3-2) are opposite. The small-size precombustion chamber for the engine provided by the invention has the advantages that a good fuel oil atomization and stable low-speed ignition region can be provided, the structure of the whole precombustion chamber is compact, the dimension is small, the successful ignition can be realized in a wide stream Mach number range, and the application range is wide.

A main component has a general formula of {(1−x)(K_1−a−bNa_aLi_b)_m(Nb_1−c−dTa_cSb_d)O_3−x(M1_0.5Bi_0.5)_nM2O₃} (wherein M1 is Ca, Sr or Ba, M2 is Ti, Zr or Sn, 0.005≦x≦0.5, 0≦a≦0.9, 0≦b≦0.3, 0≦a+b≦0.9, 0≦c≦0.5, 0≦d≦0.1, 0.9≦m≦1.1, and 0.9≦n≦1.1). At least one specific element selected from the group consisting of In, Sc, Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb and Lu is contained at as in sample numbers 46 to 48, 0.1 to 10 mol in total per 100 mols of the main component (preferably, 1.5 to 10 mol). This provides a piezoelectric ceramic composition and a piezoelectric ceramic electronic component that can have a desired high piezoelectric d constant in a consistent and highly efficient manner in both a very low electric field and a high electric field.

The invention relates to a multi-channel reverse injection type swirl single cone combustor and a use method thereof. The combustor comprises a pulverized coal supply mechanism, a transition channel,a multi-stage air distribution assembly, diversion plates, a stable combustion cavity and a rectifying cavity; the multi-stage air distribution assembly comprises N air ducts, the N air duct is connected with the stable combustion cavity and the rectifying cavity in sequence to form a combustor body, the pulverized coal supply mechanism penetrates through the inner part of the combustor body,and the transition channel sleeves the pulverized coal supply mechanism; except for the N air duct, the other air ducts are of double-layer hollow structures, and one end of at least one diversionplate is inserted into the corresponding air duct; at least one direct current channel is formed between each diversion plate and the stable combustion cavity, flaring is formed in the other end of each diversion plate, and the angle of the flaring is the same as the angle of the stable combustion cavity. The combustor adopts the design of the multi-stage air distribution assembly, air is dividedinto N strands to enter the combustor body, and the turbulence intensity at the airflow boundary is strong, so that the air and powder mixing rate is strengthened, pulverized coal ignites stably, andhigh-efficiency and low-nitrogen combustion of the pulverized coal can also be guaranteed.

The invention discloses a double-volute swirl type pulverized coal burner provided with a natural gas spray pipe and a pre-burning chamber. The burner mainly comprises a double-volute burner, the natural gas spray pipe, a natural gas-air nozzle, a central air pipe flaring, a primary air pipe flaring, the pre-burning chamber and a rear secondary air duct. Combustion of low-volatile coal is supported in a natural gas feeding manner, and the natural gas can increase coal dust volatiles through phase conversion at the preliminary stage of pulverized coal combustion through reasonable structure design; a good air dynamic field is organized through structure design and reasonable air distribution, so that the low-volatile pulverized coal can be timely ignited, stably burned and efficiently burnt out. The double-volute swirl type pulverized coal burner is simple in structure, convenient to modify, capable of efficiently burning the low-volatile pulverized coal and particularly suitable for structure transformation of a small industrial boiler burner, and can be widely applied to the low-volatile pulverized coal burnt on an industrial boiler.

The invention relates to a cold-start and small-load combustion control system and method for a low-temperature combustion engine. The cold-start and small-load combustion control method for the low-temperature combustion engine comprises the steps that a control system which comprises cylinder pressure detection glow plugs, oil nozzles, common rail systems, batteries, engine electric-control units, glow plug control units and combustion state analysis units which are arranged in four air cylinders of an internal combustion engine correspondingly is arranged; the operating state information of the engine is detected, and the operating state information includes the temperature of the engine, the temperature of cooling liquid, the air inlet temperature, the air inlet pressure, the rotating speed of the engine, the torque of the engine, the torque required by a driver and the environment temperature and pressure; whether the engine is in a cold-start state or not currently is judged, and cold-start control is conducted if it is judged that the engine is in a cold-start state; the next step is executed if the engine is not in the cold-start state; whether the engine is under a small load working condition or not is judged, and small-load combustion assisting control is conducted if the engine is under the small load working condition; and otherwise, heating through the glow plugs and intervention of a low-pressure spraying method are not needed. The cold-start and small-load combustion control system and method for the low-temperature combustion engine can be widely applied to various electric-control diesel engines and electric-control gasoline engines.

The invention relates to an intelligent gasification furnace and a control method thereof. The intelligent gasification furnace comprises a combustion net, a fuel pipe, an ignition air control and material control valve, a gasification chamber, an ignition sensor, a fuel pump, a fuel tank, another gasification chamber, a solenoid valve, an oil nozzle, an annular air injection port, a combustion port, a preheating chamber, a pulse igniter, an intelligent controller, a sensor and an air injection groove. The intelligent gasification furnace solves the problems that an existing intelligent gasification furnace valve is low in work efficiency, firepower is not stable, fuel cannot be combusted fully, gas escapes easily, and air content of mixed gas is non-uniform. According to the intelligent gasification furnace, oil is controlled automatically, the fuel is saved, the structure is simple, the firepower is stable and safe, the gasification speed is high, gas is mixed uniformly, and operation is convenient. The operation method is the same as that of an existing cooking range commonly used. The intelligent gasification furnace protects environment and is economical, and liquefied gas can be replaced.

The invention discloses an air duct ignition burner, which belongs to the field of ignition devices. The air duct ignition burner of the present invention includes an inlet air duct and an outlet air duct, the inlet air duct and the outlet air duct (11) are connected to each other, and both are connected to the hot primary air duct, and the outlet air duct is provided with an inner A pre-chamber, at least one oil burner is arranged in the inner pre-chamber. The air duct ignition burner of the present invention has a simple structure and is easy to operate, and it has stable combustion during operation; the burning loss of the ignition air duct and the burner itself is small, and it can also be used as a non-combustion device for a preheating boiler; the structure is stable Reliable, not easy to be damaged by spontaneous combustion, long service life, and conducive to popularization.

The invention discloses a zigzag gas burner. A tapered gas nozzle is formed in the center of the inside of a jet. Air distribution blades are circumferentially formed between the jet and the tapered gas nozzle. Zigzag flame stabilizing bodies are arranged on the circumference of the taped gas nozzle. Gas spraying holes are formed in the tapered gas nozzle. Gas enters from the tapered gas nozzle and is sprayed out through the gas spraying holes. Gas distributed air enters a circular channel between the jet and the tapered gas nozzle and generates rotational-flow distributed air by the aid of the air distribution blades with angles. At the front end of the jet, the gas and the rotational-flow distributed air are intensely mixed and then meet an igniting device to fire. The zigzag gas burner is effective in preventing the flame from lifting, returning and extinguishing.

The invention provides an air-assisted jet flow flame ignition device which comprises a shell (1), a fuel oil-air premixing unit and a pre-combustion chamber. The device is characterized in that the fuel oil-air premixing unit comprises an oil injector (10), an air injection valve (6), a premixing sleeve (9), a premixing sleeve inner core (7) and an oil injector fastening bolt (11), and the premixing sleeve inner core (7) arranged in the premixing sleeve (9), and an oil injector fastening bolt, wherein the inner wall surface of the premixing sleeve (9) and the outer wall surface of the premixing sleeve inner core (7) form a premixing sleeve inner cavity (14), the inner wall surface of the premixing sleeve inner core (7), the lower end surface of a nozzle of the oil injector (10) and the upper end surface of an air inlet of the air injection valve (6) form a premixing cavity (13), the premixing cavity (13) communicates with the premixing sleeve inner cavity (14) through a through hole in the sidewall of the premixing sleeve inner core (7), and a pre-combustion chamber nozzle (4) is fixedly connected to the lower part of the shell (1) through a positioning pin.

The invention discloses a pulverized coal pre-pyrolyzation decoupling combustion device comprising a pyrolysis chamber, a cyclone separator, an ejector device and a particle burning device; the pyrolysis chamber is provided with a raw material inlet and a product outlet; the cyclone separator is provided with a product inlet, a volatile component outlet and a particle outlet; the product inlet ofthe cyclone separator communicates with the product outlet of the pyrolysis chamber through a pyrolysis product transport passage; a reburning fuel pipe is arranged at the volatile component outlet ofthe cyclone separator; a discharging pipe is arranged at the particle outlet of the cyclone separator; the reburning fuel pipe is used for being led into a hearth; the discharging pipe communicates with a particle combustion device through the ejector device; ejector gas flow is led into the ejector device; a particle combustion device comprises an air duct; and the air duct is led into the hearth. The pulverized coal pre-pyrolyzation decoupling combustion device is based on the decoupling idea, is suitable for pulverized coal decoupling combustion, can achieve the higher pulverized coal combustion rate, is relatively good in combustion stability, and can effectively suppress NOx generation.

The invention discloses an outdoor portable pneumatic atomizing furnace which comprises an oil storage bottle. A support is installed at the bottom end of the oil storage bottle. The bottom end of the oil storage bottle is fixedly connected with a pneumatic device. The gas outlet end of the pneumatic device communicates with one end of a gas guide pipe. A one-way valve is arranged on the gas guide pipe. The end, away from the pneumatic device, of the gas guide pipe is connected in the oil storage bottle in an inserted manner. Atomizing plates are installed in the oil storage bottle. Aerodynamics, physics and the combustion science are integrated in the outdoor portable pneumatic atomizing furnace, high efficiency and oil conservation are achieved, the value of each drop of oil is utilized, energy conversion is direct and thorough, and therefore resources are saved; and in addition, the outdoor portable pneumatic atomizing furnace has the beneficial effects that the size is small, firepower is fierce, oil consumption is low, maintenance, cleaning and preheating are omitted, carbon deposition is avoided, blockage does not exist, the firepower is consistent and stable, carrying is convenient, operation is simple, safety and high efficiency are achieved, and the effect of a gas furnace can be achieved through combustion in the gasoline furnace, and great convenience is brought to people loving travel.

The invention discloses a spiral-flow type supercritical hydrothermal combustion device and method. The device comprises a plurality of hydrothermal flame generators which are uniformly distributed atthe upper part of a device main body in the circumferential direction, and each hydrothermal flame generator is provided with a high-pressure organic slurry input branch pipe and a high-pressure oxidant input branch pipe; the geometric axis of an output port of each hydrothermal flame generator is externally tangent to an imaginary circle of a core combustion area in the device, a burnout slag slurry gathering cone is arranged on the lower part of the device main body and connected with a supercritical thermal fluid guide cone on the lower part of the burnout slag slurry gathering cone, a plurality of burnout slag slurry outlets D are formed in the upper part of the side face of the burnout slag slurry gathering cone, and a supercritical thermal fluid outlet C is formed in the bottom of the supercritical thermal fluid guide cone. According to the invention, rapid ignition, efficient clean combustion and effective separation of slag flow after burnout of solid-phase or solid-containingfuels such as fossil fuels (such as coal) and urban/industrial sludge are realized, and the method is an advanced combustion technology for promoting efficient and pollution-free conversion of chemical energy into heat energy.

The invention relates to the technical field of W flame staged combustion, in particular to a four-arch W flame two-stage dense and thin combustion device. A hearth of the device comprises an upper furnace body, a lower furnace body and a cold ash bucket, wherein the lower furnace body consists of a front upper furnace arch, a rear upper furnace arch, a front lower furnace arch, a rear lower furnace arch, a front wall and a rear wall bag. The four-arch W flame two-stage dense and thin combustion device has the beneficial effects that the ignition is stable, the space between the two sides of the jet flow of the two-stage combustor becomes large, the gas supplementing condition is good, the backflow of high-temperature flue gas is facilitated, the combustion is stable, and the heat load distribution is uniform; secondary air, dense coal powder and thin coal powder are subjected to layered injection and staged combustion after entering the hearth, so that the partial-stage concentrated community in the hearth is formed, and the air flow of the pulverized coal is reduced, the two-stage "thin-dense-dense and thin mixing" layered arrangement mode of coal power airflow is achieved, the mode of the single-layer combustor is further enhanced; and the high-efficiency low-NOx double-stage combustor and the air staged combustion technology are combined, so that the fuel reburning efficiency is improved and the emission of NOx is reduced.