132results about How to "Guaranteed combustion efficiency" patented technology

The present invention belongs to the combustion controlling technology of boiler hearth, especially of multiple fire nozzle hearth, and is suitable for the combustion monitoring of combustion in a four corner-rounded boiler. The present invention relates optimized efficient low nitrogen oxide exhaust control by arranging several flame image detectors to obtain the 3-D temperature distribution in hearth and through fitting the expression between radiation energy E and power generating load NE of the poer set, measuring the flame center height and the change rules of flame section temperature center with fuel amount and blast distribution proportion in different layers and different corners, and giving control command of fuel amount and blast distributino proportion in different layers and different corners according to boiler load, fuel amount and blast amount.

The invention discloses a fuel and air mixing device for a low-pollution burning chamber of a gas turbine. Fuel comprises a main burning level and a duty burning level; and air is supplied by a three-stage cyclone. The fuel and air mixing device is characterized in that the central duty level adopts diffusive burning, and the peripheral main burning level adopts premixing or semi-premixing burning. The central duty level consists of a centrifugal atomizing nozzle and first-stage cyclone air; and the rotating directions of the first-stage cyclone air and second-stage cyclone air are opposite. The fuel of the main burning level is supplied by a multipoint direct-injection type nozzle, the air is respectively supplied by the second-stage cyclone air and third-stage cyclone air, and the rotating directions of the second-stage cyclone air and third-stage cyclone air are opposite. The central duty level is used when in low working conditions such as starting and slowing and the like, so that the stable burning range can be widened, the burning efficiency can be improved and the emission of CO and UHC is reduced; and when in large working conditions, the duty level and the main burning level work simultaneously, the duty level provides a stable ignition source for the main burning level, a main burning area is in a lean-oil state, and the temperature is far lower than the temperatureof insulated flame, so that the emission of NOx under the large working conditions can be obviously reduced. The fuel and air mixing device can be used for an aerial gas turbine engine or an industrial gas turbine.

The invention discloses a variable compression ratio device with a self-locking structure for an engine. The device comprises an eccentric shaft sleeve assembly, a transmission shaft, a gear assembly, a driver assembly and a control valve assembly, and the structure meets the first self-locking condition that f1*r1+f2*r2 is more than or equal to e. The variable compression ratio device has the self-locking capacity in a crank angle area of engine explosion pressure pulse, the huge explosion pressure of the top of a piston can be borne, the pressure is not transmitted to a transmission system, the structural damage is reduced, and the reliability of the device is improved; and the compression ratio of each cylinder can be accurately and synchronously adjusted through low driving torque only outside the crank angle area of explosion pressure pulse, so that the engine always operates at the highest efficiency regardless of conditions of full load or partial load. The variable compression ratio device has the advantages of convenience in adjustment and control, low power consumption, simple structure and low cost and is suitable for various engines.

The invention relates to a device and a method for controlling NOx discharge of a circulating fluidized bed by coupling air staging and fuel staging, and belongs to the technical field of circulating fluidized beds. According to the device and the method, the fuel staging and the air staging are combined, fuel gas generated by the circulating fluidized bed is taken as reburning gas, so that the cost is low, and the NOx discharge during running process of the circulating fluidized bed is effectively reduced. A vaporizing chamber and an air chamber of the vaporizing chamber are arranged outside the rear wall of a furnace body, a fuel gas inlet communicated with the furnace body and the vaporizing chamber is formed in the rear wall of the furnace body, a burn-out area outlet of the furnace body is communicated with a cyclone separator, the bottom of the cyclone separator is communicated with the vaporizing chamber through a return valve and a connecting pipe. Secondary fuel is added to a material inlet, and is mixed with a high-temperature circulating material in the vaporizing chamber to obtain a mixed material; air is supplied to the vaporizing chamber from the bottom of the vaporizing chamber, the mixed material is fluidized, the generated fuel gas enters the furnace body, a reburning area with a reducing atmosphere is formed at the upper end of a main combustion area, and NOx generated in the main combustion area is reduced into N2. The device and the method are used for controlling the NOx discharge of the coal-fired circulating fluidized beds.

A method for decreasing nitrogen oxide of mixed gas fuel used on pulverized-coal boiler includes dividing gas fuel to be two grades then leading them into pulverized-coal furnace tank, leading in primary gas fuel as combustion-assistant fuel at bottom of master burner at master combustion region to burn it by utilizing gradation air-combustion technique with low air overdose parameter, leading in secondary gas fuel at top of master combustion region to form reducing atmosphere of re-combustion region and leading in burn out air at top of re-combustion region.

The invention discloses a face-fired boiler advanced denitration burning method. The method comprises the following steps: fire coal is sent to a hearth through primary air in the primary air nozzles of a plurality of turbulent burners in each of layers of turbulent burners arranged on a front wall and a rear wall and is burnt, secondary air is introduced through secondary air nozzles of the turbulent burners, over fire air is introduced through one or more layers of over fire air nozzles on the front wall and the rear wall, the primary air and the secondary air on the front wall and the rear wall are oppositely introduced, the excess air coefficient range of the main burning area of the turbulent burners is 0.5-1.05, and the fire coal undergoes low oxygen burning; the excess air coefficient range of the over fire area of the over fire air nozzles is 1.05-1.3, and oxygen rich burning is carried out; and one or more layers of an amino reduction inhibitor are injected to the hearth under the uppermost over fire layer to reduce nitrogen oxides in flue gas in high temperature environment in the hearth and inhibit generation of new nitrogen oxides. The face-fired boiler advanced denitration burning method has the advantages of substantial reduction of the nitrogen oxide discharge value of the outlet of the hearth, realization of ultralow discharge, no strict temperature window or catalyst, great reduction of the denitration cost, and prevention of high temperature corrosion of water screens in the boiler.

The invention provides a mild combustor. The mild combustor comprises a combustor flame tube, a combustor casing and a combustor head baffle; the combustor head baffle and the front wall of the combustor casing form the head of the combustor, and an on-duty nozzle assembly is arranged in the center of the head of the combustor; a jet flow nozzle assembly is arranged on the circumference of the head of the combustor, and the center of the head of the combustor serves as the circle center of the circumference; a first return flow zone formed by the on-duty nozzle assembly is located in the downstream position of the outlet end of the on-duty nozzle assembly, a second return flow zone formed by the jet flow nozzle assembly is located in the downstream position of the first return flow zone, mild combustion in the combustor flame tube is achieved, and ultra-low nitrogen oxide emission in a wide load range can be achieved; and moreover, high-temperature flue gas is mixed with air/fuel mixed gas, and accordingly the combustion efficiency is improved. The mild combustor is compact in structure, is a cylindrical combustor and can directly replace a gas turbine engine combustor of the similar structure.

The invention discloses a W-firing boiler advanced denitration combustion method. The method comprises the following steps: fire coal is sent to a hearth through primary air in the primary air nozzles of a plurality of main combustors on boiler arches of a front wall and a rear wall and is combusted, secondary air and under-arch secondary air are respectively introduced through secondary air nozzles and under-arch secondary air nozzles, exhaust gas wind is introduced through exhaust gas wind nozzles on the front wall and the rear wall, one or two layers of over-fire air are introduced through over-fire air nozzles, the excess air coefficient range of a main combustion area is 0.7-1.05, and the fire coal undergoes low oxygen combustion; the excess air coefficient range of an over-fire area is 1.05-1.3, and oxygen rich combustion is carried out; and one or more layers of an amino reduction inhibitor are injected to the hearth under the uppermost over-fire air layer to reduce nitrogen oxides in flue gas and inhibit generation of new nitrogen oxides. The W-firing boiler advanced denitration combustion method has the advantages of substantial reduction of the nitrogen oxide discharge value of the outlet of the hearth, realization of ultralow discharge, no strict temperature window or catalyst, great reduction of the denitration cost, and prevention of high temperature corrosion of water screens in the boiler.

The invention provides a vehicle fuel and a preparation method thereof. The vehicle fuel comprises the following components in parts by weight: 5-10 parts of diesel oil, 30-80 parts of polymethoxy dimethyl ether, 1-5 parts of an alcohol combustion improver, 1-5 parts of a corrosion inhibitor, 1-10 parts of an anti-detonator, 1-5 parts of a catalysis combustion improver, 1-10 parts of a stabilizer, 1-5 parts of an anti-oxidant, 0.1-5 parts of a dispersing agent and 5-10 parts of solvent oil. The preparation method comprises the following steps: sufficiently stirring and mixing the diesel oil, the polymethoxy dimethyl ether and the solvent oil at normal temperature to obtain a first mixture; under the stirring state, adding the alcohol combustion improver, the corrosion inhibitor and the catalysis combustion improver into the first mixture to obtain a second mixture; under a stirring and 35-60 DEG C constant-temperature condition, adding the stabilizer, the anti-detonator, the anti-oxidant and the dispersing agent into the second mixture, wherein the time interval of addition between adjacent substances is 1-2 hours; and preserving the heat and standing for 3-5 hours after stirring for 1-2 hours. The vehicle fuel provided by the invention is good in stability, and the utilization rate of the polymethoxy dimethyl ether is high.

A combustion method capable of reducing nitrogen oxide discharge of a circulating fluidized bed comprises the following steps: a combustion device provided; fuel and combustion air, the amount of which is higher than theoretical combustion air amount and lower than conventional combustion air amount is introduced into a combustion chamber of the circulating fluidized bed, so that atmosphere in the combustion chamber of the circulating fluidized bed is kept to be reducing atmosphere; gas-solid mixtures generated by the combustion chamber of the circulating fluidized bed are enabled to enter a cyclone separator, most particles in the gas-solid mixtures are separated and returned to the combustion chamber of the circulating fluidized bed again through a back-feeder, flue gas in the gas-solid mixtures flows into a tail flue through a center cylinder and an outlet flue; and afterflaming air is introduced into the center cylinder and/or the outlet flue, so that carbon monoxide and other combustible components in the flue gas are combusted completely. By adopting the method provided by the invention, the emission concentration of nitrogen oxide in the flue gas can be reduced, and meanwhile, the combustion efficiency of the circulating fluidized bed combustion device is ensured.

The invention discloses a supercritical carbon dioxide coal-fired boiler system and a smoke-air coupling three-dimensional circulation process thereof. The coal-fired boiler system comprises a hearth,a flue, a secondary fan and a recirculation flue, wherein combined air nozzles are arranged on the peripheral wall surface of the hearth; one end of the flue communicates with the upper end of the hearth; an air outlet of the secondary fan communicates with the combined air nozzles through an air volume control valve; the air inlet end of the recirculation flue communicates with the flue; the airoutlet end of the recirculation flue communicates with the combined air nozzles through a smoke volume control valve; and a recirculation fan is arranged on the recirculation flue and is used for extracting smoke from the flue. The supercritical carbon dioxide coal-fired boiler system can guarantee the combustion efficiency of a coal-fired boiler and effectively relieves high-temperature corrosion and coking and slagging of the wall surface of the coal-fired boiler.

The invention discloses a deep denitration combustion method for a tangential boiler. The hearth of the tangential boiler comprises a main combustion zone, a reduction zone and a burning-out zone; fuel coal is fed into the main combustion zone of the hearth for combustion through primary air in one or more layers of primary air nozzles; one or more layers of secondary air is introduced through secondary air nozzles in the main combustion zone; and one or more layers of burning-out air is introduced through burning-out air nozzles in the burning-out zone. The deep denitration combustion method is characterized in that an excess air coefficient in the main combustion zone ranges from 0.5 to 1.05, and the fuel coal is subjected to low oxygen combustion; an excess air coefficient in the burning-out zone ranges from 1.05 to 1.3, and the fuel coal is subjected to oxygen-enriched combustion; an amidogen reduction inhibitor is sprayed in through one or more layers of reduction inhibitor nozzles in the hearth below the burning-out air on the uppermost layer; the reduction inhibitor nozzles on the same layer are located on the same plane; and nitric oxides in smoke are reduced in a high-temperature environment in the furnace, and generation of new nitric oxides is inhibited. By adopting the deep denitration combustion method, a nitric oxide emission value at the outlet of the hearth can be obviously lowered, and ultra-low emission is realized; strict temperature windows and analysts are not needed; denitration cost is greatly lowered; combustion efficiency can also be ensured; economic benefit is obvious; and the deep denitration combustion method has wide applicability.

The invention provides a fuel oil nozzle. The fuel oil nozzle comprises a fuel pipe, air pipes, a mixing area and a mixed gas spraying pipe. The output ends of the fuel pipe and the air pipes communicate with the input end of the mixing area, and the output end of the mixing area communicates with the input end of the mixed gas spraying pipe. The fuel oil nozzle has the beneficial effects that adequate premixing of fuel gas and air can be achieved, and discharging of NOx, CO and the like is effectively reduced while burning efficiency is guaranteed.

The invention provides an electrolytic aluminum flue gas quantity and contaminant zero-deviation emission system, which comprises an electrolytic aluminum flue gas defluorination and dust-removal unit and combustion equipment, and further comprises a zero-deviation emission flue and a flue gas circulation unit. An inlet of the zero-deviation emission flue is connected with an emission outlet of a purification unit; an outlet of the zero-deviation emission flue is connected with a combustion-supporting gas inlet of the combustion equipment; a circulation port is formed in the zero-deviation emission flue; a flue gas inlet of the flue gas circulation unit is connected with the circulation port; and a flue gas outlet of the flue gas circulation unit is connected into an electrolytic cell, so that part of the flue gas is circulated into the electrolytic cell for replacing part of air, and the rest of flue gas is fed into the combustion equipment so as to be used as combustion-supporting gas. The electrolytic aluminum flue gas quantity and contaminant zero-deviation emission system further comprises a combustion-supporting gas compensating unit and a combustion-supporting gas distributing unit for supplementing or distributing the flue gas fed into the combustion equipment so as to ensure the flue gas to be matched with the combustion-supporting gas quantity. A control unit is additionally arranged, so that the flow quantity of circulation flue gas is matched with the required cooled flue gas quantity, the temperature of the circulation flue gas is reduced to a required cooling temperature value, and the flue gas quantity fed into the combustion equipment is matched with the combustion-supporting gas quantity.

A jet nozzle of a mild combustion chamber of a gas turbine comprises a fuel inside nozzle, a fuel outside spray hole, multiple rotational flow groove channels, an outside pipeline and an inside pipeline. The mixing uniformity of fuel and air at a jet nozzle outlet is improved, the outside fuel-air equivalence ratio is relatively low, flame root lifting is facilitated, too-early ignition does not occur easily, jets of the jet nozzle belong to weak rotational flows, the overall pressure loss is relatively low, the axial speed is not prone to attenuation, and increase of the smoke reflux ratio ofthe combustion chamber is facilitated.

The invention relates to the technical field of activated aluminium oxide prepared by non-ferrous metal, specifically a novel aluminium oxide vertical activation roasting device and a roasting method.Aluminium oxide pellets move from top to bottom in a vertical roasting furnace, and are discharged from a discharging valve at the bottom of the furnace body after pre-storage, roasting and cooling processes. Flue gas generated by natural gas combustion roasts aluminium oxide pellets from bottom to top, and then is discharged after primary and secondary dust removal from the top of the furnace body. A cooling heat exchange pipe is arranged at the lower part of the furnace body, cooling gas is introduced into the pipe, the roasted high-temperature aluminium oxide pellets are cooled when flowing outside the pipe; after being heated, the cooling gas in the heat exchange pipe is sent into a combustion chamber through an air pipe to be used as combustion-supporting gas of natural gas, therefore, the waste heat recovery of the aluminium oxide pellets is realized. The roasting device provided by the invention has higher waste heat recovery utilization rate, full heat exchange between combustion flue gas and aluminium oxide pellets, and effectively reduces the natural gas energy consumption; and the method is reasonable, efficient, simple and easy to operate.

The invention discloses a low-oxygen flameless heat storage type combustion device. The device comprises a first air inlet, a combustion chamber, a preheating cavity, a shell and a control panel. Thepreheating cavity is formed in the bottom end of the interior of the shell, a heating pipe is mounted on one side of the bottom of the preheating cavity, a temperature sensor is mounted at the position, above the heating pipe, of the inner wall of the preheating cavity, a dust filter cavity is formed in the position, above the preheating cavity, in the shell, a circulation groove is formed in oneside of the bottom of the dust filter cavity, the bottom end of the circulation groove extends into the preheating cavity, a flow limiting structure is arranged in the circulation groove, a combustionchamber is arranged at the position, above the dust filter cavity, in the shell, air storage grooves are fixed to the two inner side walls of the combustion chamber, and nozzles are formed in the outer wall of one side of each air storage groove at equal intervals. The combustion efficiency during use of the combustion device is ensured, the application range of the combustion device is widened,and the portability during use of the combustion device is improved.

The invention relates to the technical field of pistons, in particular to a piston, an engine and a vehicle. The piston is provided with a combustion chamber with an omega-shape, the inner wall of thecombustion chamber comprises a conical table surface located in the center, and an arc-shaped surface connected to the periphery of the conical table surface, in the circumferential direction, a plurality of dividing bumps are arranged on the conical table surface at intervals, oil injection channels are formed between any two adjacent dividing bumps, a plurality of oil injecting holes of an oilinjector can inject the oil into the multiple oil injection channels one by one, the oil liquid can be atomized into oil mist in the combustion chamber, part of the oil mist can pass through the oil injection channels and impact on the arc-shaped surface to form upward curling flow, so as to utilize the air outside the combustion chamber for combustion, the other part of oil mist can collide on the two adjacent dividing bumps and form lateral curling flow movement, so as to utilize the air inside the combustion chamber for combustion, the air in the combustion chamber can be fully utilized toensure the combustion efficiency, and thus the overall dynamic performance and emission performance of the engine are improved.

A burner for a gas stove and a gas stove, wherein the burner includes a nozzle and an injection pipe, the nozzle of the nozzle is aligned with the inlet of the injection pipe, and there is a gap between the nozzle and the inlet; it also includes a fixing bracket for connecting The nozzle and the injection tube; the position where the fixed bracket cooperates with the injection tube is provided with a first connection hole, and the injection tube has a second connection hole corresponding to the first connection hole, which is passed through the first and second connection holes The connecting piece in the fixed bracket is fixedly connected with the injection tube. Compared with the prior art, the present invention enables the gap between the nozzle and the inlet of the injection pipe to be fixed, so that the gas and air have a stable mixing ratio and ensure combustion efficiency.