75results about How to "Reduce Excess Air Coefficient" patented technology

The invention discloses an oxygen-enriched combustion transformation method for a garbage incineration grate furnace. The method comprises the steps that an oxygen injecting step is added before the primary air of a combustion section, namely, oxygen obtained by gasifying and pressure regulating is injected into a primary air pipeline of the combustion section, so the air is fully mixed with the normal air of the combustion section and is then injected into a hearth; injection of normal secondary air is stopped, a draught fan behind a cloth bag deduster is connected with a secondary fan by a pipeline, so circulated smoke is guided into a secondary air pipeline by the secondary draught fan, and is injected into the hearth by a secondary air opening. The invention discloses a corresponding oxygen-enriched combustion device. The excess air coefficient is reduced, the flame temperature in the furnace is improved, the combustion condition is optimized, the generation of pollutants such as dioxin is effectively inhibited, the efficient, stable and safe operation of the incineration equipment is ensured, the smoke exhaust is reduced, the smoke heat loss and output of the draught fan are reduced, the combustion efficiency is improved, and the investment and operation cost of smoke purifying equipment are favorably reduced.

The invention relates to a three-dimensional hierarchical air supply combined waste incinerator, in particular to a waste incinerator. The waste incinerator provided by the invention solves the problems of single function and narrow application range of the traditional waste incinerator. In the waste incinerator provided by the invention, the lower end of a feeding device is communicated with one end of a rotary drying pyrolysis device; the other end of the rotary drying pyrolysis device is communicated with a grate type incinerator; the feeding device and the rotary drying pyrolysis device are fixedly installed on a first bracket; two groups of secondary air spray pipes are both communicated with a secondary air main pipe; one group of the two groups of secondary air spray pipes is positioned above a rear arch and arranged on the outer side wall of a rear wall, and the other group of secondary air spray pipes are arranged at the lower end of a front wall; each group of secondary air spray pipes is communicated with a hearth; a high-temperature smoke interface is communicated with a horizontal flue through a pipeline; an intermediate-temperature smoke interface is communicated with a tail flue through a pipeline; and an air interface is communicated with the air outlet of an air preheater through a pipeline. The waste incinerator provided by the invention is used for incinerating waste.

The invention relates to a cold crude gas heat accumulating type oxygen-enriched combustion method and a cold crude gas heat accumulating type oxygen-enriched combustion system. The combustion method comprises the steps of transmitting cold crude gas, generating and transmitting mixed oxygen-enriched air, reversing the oxygen-enriched air by an air-smoke reversing valve, heating the reversed oxygen-enriched air in a heat accumulating type burner, mixing the oxygen-enriched air with gas for burning, discharging smoke, and the like; the combustion system comprises a gas system, an air-smoke system and an oxygen system, wherein the tail end of a pipeline of the oxygen system is connected with a dynamic mixer of the air-smoke system; the tail end of a branch behind the air-smoke reversing valve in the air-smoke system is connected with the heat accumulating type burner of the gas system. Compared with the prior art, the method and the system have the beneficial effects that (1) the burning velocity is increased, the tempering is avoided, and the combustion safety is improved; (2) the ignition temperature of fuel and the burn out time are reduced; (3) the excess air coefficient is reduced, and the amount of the smoke after combustion can be reduced; (4) the production of CO2 and NOX can be effectively reduced, so that the environmental protection can be better realized; (5) the system is simple in structure, convenient to operate and high in degree of automation.

The invention relates to a 4D multidimensional low-nitrogen combustor. The combustor comprises a boiler furnace. Along the vertical direction of the boiler furnace, the air for combustion is divided into four grades: the first grade is a main combustor area, the second grade is over fire air next to the top of the main combustor, the third grade is low-position over fire air, which is higher than the main combustor, and the fourth grade is high-position over fire air, which is higher than the low-position over fire air. In the vertical direction, the air is combusted in three grades. Along the horizontal cross section direction of furnace, from inner to outer, the air flow is divided into condensed coal powder air flow, diluted coal powder air flow, and flow of air close to the wall; and in the horizontal direction, the air is combusted in two grades. At the same time, the reduction and burn-out time of flue gas in the combustion area in furnace are controlled so as to reduce the discharge of oxynitride and minimize the influence on boiler burning efficiency. The provided combustor can solve the problem of limitation influence of combustion air mode, effectively reduce the discharge of oxynitride in coal-fired boiler by 50% or more, and effectively reduce the discharge of oxynitride in old boiler improvement.

The invention relates to the technical field of boiler burning, in particular to a smoke recirculator for a boiler. According to a conventional smoke recirculator, auxiliary equipment is needed, a system is complicated, the investment is large, and it is quite difficult to stably lowering the oxygen concentration to the degree which is low enough in the true sense on most occasions. According to the smoke recirculator for the boiler, recirculating smoke and air are mixed, so that the burning temperature is decreased, the oxygen concentration is lowered, the smoke heat exchange coefficient is increased, and the overall efficiency of the boiler is improved; by arranging a smoke and air mixing chamber and optimizing the structure of a flue system, a complicated flue structure is simpler and more reasonable, and the stability and safety of the whole system are improved.

The invention provides an industrial pulverized coal boiler burning device used for spraying ammonia in the center of a burner, and relates to the technical field of industrial pulverized coal boilers. The problems that according to an existing horizontal industrial pulverized coal boiler, the NOx emission amount is high, the NOx emission reduction cost is high, the burnout condition of pulverized coal is poor, the adjusting capacity for load change is poor, the boiler thermal efficiency is low, and slagging is severe are solved. The burning device comprises a primary air pipe, a direct flow secondary air pipe, a rotational flow inner secondary air pipe, a rotational flow outer secondary air pipe, a mixer, an amino reducing agent conveying pipe, a concentrated pulverized coal conveying pipe, a hearth and a two-stage over-fire air system. The primary air pipe, the direct flow secondary air pipe, the rotational flow inner secondary air pipe and the rotational flow outer secondary air pipe are sequentially arranged from inside to outside. The amino reducing agent conveying pipe and the concentrated pulverized coal conveying pipe are connected with the inlet end of the mixer. The outlet end of the mixer is connected with the inlet end of the primary air pipe. The two-stage over-fire air system is arranged on the wall of the hearth. The burning device is used for an industrial pulverized coal boiler.

The invention discloses a device and a method for cooling clinker by liquid oxygen and liquid nitrogen of a cement kiln. The device is characterized in that a high-temperature cooling region of a grate cooler of the cement kiln is provided with a liquid oxygen input connector, and a middle-temperature cooling region of the grate cooler is provided with a liquid nitrogen input connector. The method comprises the steps of adding liquid oxygen the volume of which is 1%-12% of the total volume of cooling air fed by an air blower of a high temperature section of the grate cooler of the cement kiln, and adding liquid nitrogen the volume of which is 1%-45% of the total volume of cooling air fed by an air blower of a middle temperature section of the grate cooler of the cement kiln. The device and the method provided by the invention have the advantages that the cooling rate of clinker is improved by inputting liquid oxygen, and high-temperature clinker is cooled suddenly, so that the decomposition of D3S at 1250 DEG C is prevented or alleviated, the crystallization of MgO is prevented or alleviated, and the stability of the clinker is improved; a C3S crystal is prevented from growing, and thus the grindability of clinker is improved; the C2S crystal transfer is effectively prevented or alleviated by introduced liquid nitrogen.

The invention discloses a slag lean-oxygen combustion catalytic oxidation type staged combustion boiler system and method. The slag lean-oxygen combustion catalytic oxidation type staged combustion boiler system comprises a lean-oxygen combustion chamber and a carbon monoxide catalytic oxidation device. A cavity is contained in the lean-oxygen combustion chamber. The upper end of the lean-oxygen combustion chamber is provided with a smoke outlet. A secondary combustion chamber is arranged on the downstream side of the smoke outlet of the lean-oxygen combustion chamber. A smoke inlet of the secondary combustion chamber communicates with the smoke outlet of the lean-oxygen combustion chamber. An air supplementation chamber is arranged on the downstream side of the smoke outlet of the secondary combustion chamber. A smoke inlet of the air supplementation chamber communicates with a smoke outlet of the secondary combustion chamber. The downstream side of the smoke outlet of the air supplementation chamber is provided with the carbon monoxide catalytic oxidation device. The smoke inlet of the carbon monoxide catalytic oxidation device communicates with a smoke outlet of the air supplementation chamber. According to the slag lean-oxygen combustion catalytic oxidation type staged combustion boiler system and method, through staged combustion of coal, high efficiency and low emission of NOx can be achieved, and atmospheric pollution is lowered; a SCR denitration device is not arranged, so that the catalyst optimum temperature limitation problem, the ammonia injection mixing evenness problem, the catalyst waste treatment problem and other serious problems in the denitration process can be avoided.

The invention provides a surrounding air method for reducing the NOx emission concentration of a power station pulverized coal powder plant boiler. The method includes the specific step of replacing existing secondary air with primary air high in wind pressure under the condition that it is ensured that the total air volume of a hearth is not changed, wherein the primary air is used as surrounding air of a cooling pulverized coal spray nozzle. Because the wind pressure of primary air is higher than the wind pressure of secondary air, after the existing surrounding air is replaced with primary air, the flowing speed of surrounding air is increased. It is ensured that the momentum of surrounding air is constant before and after replacement, and therefore the mass flow rate of surrounding air is correspondingly decreased after replacement. Because the momentum of surrounding air is not changed, the cooling effect the same as that of a combustor can be achieved, and rigidity of the pulverized coal jet flow is also ensured. Meanwhile, the mass flow rate of surrounding air is decreased, and therefore the excess air coefficient of the initial combustion period of pulverized coal is decreased, NO generation in the initial period of combustion is restrained, and therefore the NO emission concentration during running of the boiler is reduced.

The invention discloses a low emission type circulating fluidized bed boiler and relates to a circulating fluidized bed boiler, in particular to a low emission type circulating fluidized bed boiler adopting an in-furnace desulfurization and low nitrogen combustion technology in order to solve the problems than in an out-furnace environment-friendly device of an existing circulating fluidized bed boiler, desulfurization and denitration equipment is in low removal efficiency, high in running cost and large in floor space. The low emission type circulating fluidized bed boiler comprises a separator, a refeeder, a hearth, a coal feeding device, a primary air chamber, a secondary air bellow, a high temperature coal economizer and a low temperature coal economizer; the coal feeding device and the secondary air bellow are installed on the lower portion of the hearth; the primary air chamber is arranged at the bottom of the hearth; in a tail flue, the high temperature coal economizer and the low temperature coal economizer are sequentially arranged from top to bottom; and the ratio of the width of the primary air chamber to the width of the hearth is 0.4-0.5. According to the low emission type circulating fluidized bed boiler, the initial super-low emission of the boiler is adopted by adopting the in-furnace desulfurization and low nitrogen combustion technology, 'out-furnace treatment' is converted into 'in-furnace emission reduction', and pollutant generation is controlled from the source.

The invention discloses a pyrolysis and gasification garbage incinerator adopting an oxygen enriched combustion technique. The pyrolysis and gasification garbage incinerator comprises an oxygen preparation unit, an oxygen injection unit and an incinerator main body unit, wherein the oxygen injection unit is connected with the oxygen preparation unit and the incinerator main body unit, the oxygen injection unit comprises a booster fan, a shutoff valve and two oxygen flow control devices, and each oxygen flow control device comprises a flow meter, a regulating valve, a stop valve, a mixer and an air supply fan; the shutoff valve is connected with the flow meters; the incinerator main body unit comprises an incinerator body and a smoke purification device, and the incinerator body comprises a first combustion chamber, a second combustion chamber and a partition. According to the pyrolysis and gasification garbage incinerator, the problems of low combustion temperature and combustion efficiency, substandard pollutant discharge and the like caused by low oxygen content of air or low garbage calorific value can be effectively solved.

The invention discloses a power and heat co-supply system based on a Stirling engine and a power and heat co-supply method of the system. Grids cannot be laid in a great majority of families in mountainous areas and underdevelopment areas. Biomass combusts in a combustion furnace, molten salt in a heat storage pot is heated, and the high-temperature molten salt heats a hot end of the Stirling engine to drive the Stirling engine to generate power; a circulating water system for cooling a cold end of the Stirling engine flows through the cold end of the Stirling engine and an economizer, waste heat of the two parts is recovered, and hot water at 50-100 DEG C is finally obtained. With the adoption of the system and the method, the problems that the Stirling engine causes severe ash accumulation and coking at the hot end when applied to a biomass direct-combustion power generation boiler and the power generation efficiency is decreased are solved; gradient utilization of energy is realized and the thermal efficiency of the system is high; power and heat co-supply is realized and the energy saving effect is remarkable; the power output quality is stable, the system is very suitable for energy storage and release, and a way is provided for solving the problem about power in power islands in remote areas.

The invention relates to a low nitrogen emission coke-oven heating system adopting rich gas heating and adjustment method thereof. The coke-oven heating system comprises a small flue, a heat exchangepassage, a combustion-supporting gas passage and a combustion chamber. The heat exchange passage comprises a heat exchange passage for gas supply at the bottom of a vertical flue and a heat exchange passage for gas supply at the section of the vertical flue; a small flue connecting pipe corresponding to the heat exchange passage for gas supply at the bottom of the vertical flue is provided with agas supply hole at the bottom of the vertical flue and a gas intake flow adjustment device I, and the heat exchange passage for gas supply at the bottom of the vertical flue is communicated with the outlet of the combustion-supporting gas at the bottom of the vertical flue through the combustion-supporting gas passage; the small flue connecting pipe corresponding to the heat exchange passage for gas supply at the section of the vertical flue is provided with the gas supply hole at the section of the vertical flue and a gas intake flow adjustment device II at the section of the vertical flue, and the heat exchange passage for gas supply at the section of the vertical flue is communicated with the outlet of the combustion-supporting gas in the partition of the vertical flue through the combustion-supporting gas passage. According to the low nitrogen emission coke-oven heating system, the amount of combustion-supporting air entering the bottom, middle, and upper parts of the vertical fluecan be independently and quantitatively adjusted, and the formation of nitrogen oxides can be effectively reduced.

The invention relates to a reciprocating-oscillation type mechanical grate used with a layered decoupling burning furnace, which comprises a reciprocating-type upper grate with a grid structure, and an oscillating type lower grate, and a lower grate. The left end of the reciprocating-type upper grate is overlapped with the upper end of the oscillating type lower grate. The right end of the reciprocating-type upper grate is supported by and connected with a supporting rod. The lower end of the oscillating type lower grate is supported by and connected with a supporting beam. The lower end surface of the oscillating type lower grate is connected with a transmission mechanism. Under the drive of the transmission mechanism, the oscillating type lower grate oscillates reciprocatingly and alternately in clockwise and counterclockwise directions, around the upper part of the supporting beam as a center, with an oscillation included angle of 10-40 degrees. The grate realizes the mechanical automation of layered decoupling burning furnaces with various specifications, increases the efficiency and environment-friendly performance, and solves the problems of the prior layered decoupling burning furnace with large capacity (above 700kw), such as large size, uneasy operation, and poor stability in environmental protection.

The invention discloses novel environment-friendly methanol diesel fuel and a preparation method thereof. The novel environment-friendly methanol diesel fuel is prepared from the following raw materials in parts by weight: 30 to 50 parts of biodiesel, 20 to 30 parts of methanol, 15 to 20 parts of petroleum diesel, 5 to 7 parts of methylal and 3 to 5 parts of an additive, wherein the additive is prepared from the following assistants in parts by weight: 0.3 to 0.5 part of a mutual solvent, 0.3 to 0.5 part of a combustion improver, 0.1 to 0.3 part of a purification dispersant, 0.01 to 0.03 partof an anti-seismic detonation inhibitor and 0.01 to 0.05 part of an antioxidant. According to the novel environment-friendly methanol diesel fuel disclosed by the invention, by utilizing and combiningabandoned illegal cooking oil in catering in and by utilizing a modernized ultrasonic emulsifying technology, the novel environment-friendly methanol diesel fuel is produced, a safe and environment-friendly reproducible alternative energy source is provided, the problems that carbon deposition is generated during combustion of previous diesel, the ignition is poor, cold boot is difficult, cylinder knocking is prevented from being generated during rapid combustion and the like are overcome, emission of tail gas is reduced, and pollution to the environment is reduced.

The invention provides a waste incineration power generation and water electrolysis hydrogen production coupled system which comprises a waste incineration power generation mechanism and a water electrolysis hydrogen production mechanism, and the waste incineration power generation mechanism is used for supplying power to the water electrolysis hydrogen production mechanism. The water electrolysis hydrogen production mechanism supplies hydrogen and oxygen to the waste incineration power generation mechanism through a first pipeline and a second pipeline correspondingly, and the pure water preparation mechanism is connected with the waste incineration power generation mechanism through a third pipeline and used for introducing dead steam. According to the water electrolysis hydrogen production system, the waste incineration power generation system is coupled with the water electrolysis hydrogen production system, waste heat generated in the waste incineration power generation process serves as a heat source in the membrane distillation process, pure water needed by water electrolysis hydrogen production is prepared, and the water electrolysis hydrogen production system has the advantages that the waste incineration power generation system is coupled with the water electrolysis hydrogen production system; the energy consumption required by pure water preparation is reduced, and the energy conversion efficiency of waste incineration power generation is improved.

The invention discloses a fluidized bed heat energy center of low-heat-value fuel for combustion and a using method of the fluidized bed heat energy center. The fluidized bed heat energy center comprises a three-return-stroke hearth; the bottom of the three-return-stroke hearth is connected with an isobaric air chamber through a small hood air distribution plate; the lower portion of the three-return-stroke hearth is provided with a feeding pipe, a high-position buried pipe and a material return opening; the top of the three-return-stroke hearth is provided with a water cooling wall upper header which communicates with a boiler barrel through a steam guide pipe; an outlet of the three-return-stroke hearth communicates with a tail vertical shaft through a horizontal flue bent; a conductionoil heating device and a bypass flue are vertically and parallelly distributed on the tail vertical shaft; an inlet of the bypass flue is provided with an adjusting baffle, and an outlet of the bypassflue is connected with a fresh air device; a lower outlet of the tail vertical shaft communicates with a volute separator through a downdip flue; and an outlet of the volute separator communicates with a drying production line through a connection flue. Through the fluidized bed heat energy center of the low-heat-value fuel for combustion and the using method of the fluidized bed heat energy center, the equipment investment and operation cost can be reduced, system adjusting is easy, convenient, safe and reliable, original NOX emission of equipment is low, and the flue gas up-to-standard discharge environmental protection operating cost is reduced.

The invention relates to a coal-fired boiler high-temperature ammonia spraying denitration system based on biomass pyrolysis and a method thereof, a biomass pyrolysis device and an amino reducing agent spraying device are connected to a boiler main combustion area, and high-temperature flue gas obtained after a high-temperature superheater is extracted is connected with the high-temperature flue gas inlet end of the biomass pyrolysis device; biomass fuel is subjected to multi-stage heating pyrolysis to generate mixed gas, and the mixed gas and an amino reducing agent are sequentially introduced into a main combustion area of the boiler; an air staged combustion mode is adopted, and the excess air coefficient of a main combustion area is reduced by utilizing a low-nitrogen combustor and an SOFA air nozzle; an SOFA nozzle is additionally arranged, so that a main combustion area is in a reducing atmosphere; an amino reducing agent is sprayed into the main combustion area, the amino reducing agent can be subjected to a reduction reaction with nitric oxide in flue gas in a high-temperature reducing atmosphere, and the concentration of the nitric oxide at a hearth outlet is reduced.

The invention discloses a natural gas condensing boiler system and a method thereof for catalytic oxidation of fuel-rich combustion. A combustor is successively connected with a fuel-rich combustion chamber, a second return flue pipe and a third return flue pipe to form three flue gas return paths. An excess air coefficient maintained in the fuel-rich combustion chamber is less than 1. 0, an unburnt gas catalytic oxidation device is arranged on the third return flue pipe, and flue gas passes through the three flue gas return paths and is connected with a chimney by passing through an energy saver and a condenser successively. According to the natural gas condensing boiler system, rapid combustion in a reducing atmosphere is achieved, and almost no NO<x> is generated by low-temperature oxidation in the unburnt gas catalytic oxidation device, thus the NO<x> emission level can be strictly controlled, and environmental pollution is reduced; according to the natural gas condensing boiler system and the method thereof for catalytic oxidation of fuel-rich combustion, NO<x> emission can be effectively decreased, meanwhile, the alteration cost is saved, and the heat is recycled; and the system has a wide application range, and is suitable for various heating condensing boilers.