35results about How to "Reduce incomplete combustion heat loss" patented technology

The invention discloses a control system and control method for outlet temperature of a novel coal mill. The control system comprises a controller, a coal mill outlet temperature detector and a coal mill hot air damper, wherein the coal mill outlet temperature detector is mutually connected with the controller; the controller is connected to the coal mill hot air damper. Compared with an existing control method, the control method disclosed by the invention can overcome the defects existing in an existing coal mill outlet temperature control method that a coal mill outlet temperature upper limit value is only set aiming at specific coal, the frequent change of the quality of coal supplied by the coal mill cannot be adapted, and a coal mill outlet temperature running value is low. According to the control system and the control method disclosed by the invention, the automatic level of coal mill operation can be improved, the outlet temperature of the coal mill is effectively improved, the power consumption generated during coal milling of the coal mill is reduced, and the carbon content of a product after pulverized coal combustion can be reduced.

A smokeless combustion device with fire stack in furnace consists of destructive distillation gasification combustion chamber, the second combustion chamber, top fire grate, bottom fire grate, fire stack in furnace, firepot, heated surface and fender. The extensive fuel materials such as raw coal, bulk coal, section coal, wood, straw and agricultural wastes can be used as fuel material of said device.

The invention discloses an industrial boiler for burning bio-briquettes. A front arch and a rear arch of which the front part is in an interdigitated shape are arranged in a body of the boiler; upper edges of two adjacent interdigitated parts of the rear arch are provided with corresponding grooves; a check block is arranged between two adjacent interdigitated parts; and two sides of the check block are fixedly connected with rotating shafts which are respectively arranged in the corresponding grooves. Furthermore, a figure-7 partition laminate is arranged above the rear arch; a movable division door is arranged between the rear end of the partition laminate and the rear arch; a circulating air pipe is connected with an air inlet of a draught fan outside the body through an air pipe; the air outlet of the draught fan is connected with a last-stage air bin of a chain grate; and a secondary air pipe at the air inlet on the side wall of a third combustion chamber is deflected toward the lower rear part, and is communicated with a main secondary air pipe outside the body. The industrial boiler has the advantages that: the bio-briquettes are efficiently and stably combusted; the boiler is started at a high speed and has high heat efficiency; black smoke is not generated when the boiler is started; and the integral delivery of the boiler can also be realized.

The invention relates to an ash internal cycle fluid afterburning device, based on high-temperature separation, wherein the invention uses furnace and secondary wind to realize initial high-temperature separation and sets high-temperature combined water cooling separator at the heated surface of water condense slag tube beam at the outlet of high-temperature smoke to realize ash high-temperature separation; and the separated ash is feedback to the high-temperature area to be cycle fluidized burnt, to meet the burning conditions as temperature, time, and disturbing mixing, to improve the burning rate and reduce the pollution. The invention can improve the burnt rate and the burning efficiency of coal.

The invention relates to an SCR inlet flue gas pre-treatment system and method, relates to boiler pollutant control technology, and are used for new construction or renovation projects of ultra-cleanNOx emission of grate-firing coal-fired boilers. The SCR inlet flue gas pre-treatment system comprises a temperature regulating system, a urea solution or ammonia water solution ejector, and a cycloneequalization system. The system adopts a heating way of extracting high-temperature flue gas from a hearth outlet and then introducing the high-temperature flue gas into a cyclone tube, and a coolingway of adding a temperature-regulating economizer or extracting low-temperature flue gas from flue gas at a boiler dust collector outlet or an air preheater outlet and then introducing the low-temperature flue gas into the cyclone tube through a cold flue, and the average temperature of SCR inlet flue gas is controlled within the working range of catalysts. A urea solution is ejected in a burnoutchamber through the urea solution ejector; an ammonia water solution is ejected at an inlet pipe of a cyclone separator through the ammonia water solution ejector; NH3 is produced under the action ofthe high-temperature flue gas and mixed into the flue gas. Under the combined action of a flow equalization board and the cyclone tube, the flue gas and NH3 are mixed uniformly to achieve the effectsof equal temperature, equal concentration field and equal velocity, thereby meeting the requirements on the temperature, concentration field and velocity field at an SCR inlet.

The invention discloses a combustion heat load distribution control method of a CSP sheet billet roller bottom type tunnel heating furnace. The heating furnace comprises a heating section, a soak section, a swing section and a public holding section. According to the method, heat loads of combustion nozzles of the heating section, the soak section, the swing section and the public holding section are controlled. According to the combustion heat load distribution control method, the mixed combustion time of air and gas injected by the combustion nozzles is prolonged; the combustion efficiency and high-temperature combustion gas heat efficiency are improved; incomplete combustion heat losses and heat losses of discharge smoke are reduced; damage of secondary combustion to a heat exchanger is reduced; and finally the aims of reducing secondary combustion in a flue, reducing energy consumption of the heating furnace, improving the sheet billet heating quality, prolonging the service life of the heat exchanger and the like are achieved.

The invention discloses a power station boiler system and a method for increasing the tail fume temperature of a power station boiler by integrating supplemental combustion for biomass gasification. According to the method, one or more fixed bed biomass gasifiers are additionally arranged, the gasifiers maintain the rated loads to continuously and stably operate, and hot primary air of the boiler is used as a gasification agent to promote the gasification efficiency of the gasifiers and increase the heat value of gasified gas; when the boiler operates with the low load, the biomass gasified gas is delivered into a flue behind a coal economizer or a steering fume chamber in front of the coal economizer, and the fume temperature at an outlet of the coal economizer is increased through supplemental combustion of the biomass gasified gas, so that a selective catalytic reduction fume denitration system operates safely and stably; supplemental-combustion gas is reduced correspondingly along with increasing of the loads, and the reduced gasification gas for supplemental combustion is delivered into the upper portion of a hearth so as to be combusted, and when the boiler operates with the full load, all the biomass gasified gas is delivered into the upper portion of the hearth so as to be combusted; and supplemental-combustion temperature increasing of the tail fume of the power station boiler is finally achieved through biomass resources, and meanwhile, the biomass resources can be further efficiently used for power generation.

The invention discloses a heat storage premixed biomass gas combustor and a using method thereof. The combustor comprises a porous medium heat storage premixing pipeline, an inner combustion-supporting air pipeline, an outer gas pipeline, an outer combustion-supporting air pipeline, a first sleeve, an inner combustion-supporting air rotational flow adjusting pull rod, a second sleeve, an outer gasrotational flow adjusting pull rod, a plurality of inner combustion-supporting air axial rotational flow blades and a plurality of outer gas axial rotational flow blades. The porous medium heat storage premixing pipeline, the inner combustion-supporting air pipeline, the outer gas pipeline and the outer combustion-supporting air pipeline are sequentially distributed from inside to outside, an outlet of the porous medium heat storage premixing pipeline is filled with a ceramic foam type porous medium, and an inlet of the porous medium heat storage premixing pipeline coaxially communicates witha central gas pipeline and a central combustion-supporting air pipeline. According to the combustor and the using method thereof, the purpose of efficient and low-pollution combustion of biomass gascan be achieved.

The invention discloses a novel gasification counter-heating water boiler, which comprises a boiler shell, a boiler furnace, a fire grate, a coal door, a poke door, an ash door, a smoke channel, a chimney and an automatic control device, and is characterized in that: the coal door, the poke door and the ash door are all visible sealed furnace doors with micro positive pressure, and the novel gasification counter-heating water boiler further comprises a circumferential multipoint air distributing device, a wet desulfurizing dust remover of a built-in pipe burying afterheat recycling device, and a smoke gas afterheat recycling air heater. The novel gasification counter-heating water boiler has the advantages of less equipment investment, low running cost, automated operation, 85 percent of the boiler thermal efficiency, low pollutant discharge and boiler modularization, and can be widely used in places needing small-scale heat supply such as residential houses, bath centers, factories, hotels, government agencies and the like.

The invention provides a low-emission system of a coal-fired boiler and a treatment method of the low-emission system. The system comprises a charging unit, a layer-burning boiler, an additive addingunit, a flue gas dust removal unit and a tail gas desulfurization and denitrification unit. A material outlet of the charging unit is connected with a fire coal inlet of the layer-burning boiler, anda material outlet of the additive adding unit is connected with a hearth of the layer-burning boiler. A flue gas outlet of the layer-burning boiler is sequentially connected with the flue gas dust removal unit and the tail gas desulfurization and denitrification unit. Briquette coal suitable for the layer-burning boiler is adopted, the burning conditions of fire coal in the layer-burning boiler are improved, an additive is sprayed, the adding manner of the additive is optimized, in combination with the tail gas treatment process, the heat loss caused by flue gas exhaust is finally reduced, theheat loss caused by the fact that solids are not completely burnt is reduced, the leakage amount of fine coal is reduced, the heat efficiency of the boiler is improved, emission of pollutants is reduced, and ultra-low emission of the industrial boiler is achieved.

The invention relates to the technical field of pulverized coal combustion of a large-scale coal-fired power plant boiler, and concretely relates to a side over fire air distribution method and a coal-fired boiler. Aiming at the defects such as large combustion heat loss, poor unit operation economy and high temperature corrosion of a water cooled wall caused by poor side over fire air supplying of an existing domestic coal-fired power plant boiler, the invention provides the side over fire air distribution method and the coal-fired boiler. The air distribution method is characterized in that hot primary air in a hot primary air bus pipe is used as an air source, air is fed to a side over fire air area of the coal-fired boiler, the fed hot primary air can deeply penetrate through flue gas, and incompletely combusted pulverized coal and generated combustible gases such as carbon monoxide are continuously combusted sufficiently, so that incomplete combustion heat loss of the boiler is reduced, the combustion efficiency of the boiler is improved, meanwhile, an after-combustion effect of the over fire air is improved, a trend of the high temperature corrosion occurred on the water cooled wall between a main combustor and the over fire air is alleviated, and the operating economy and the safety of the coal-fired boiler adopting the air distribution method are greatly improved.

The invention relates to a counter current heating exchanging water-fire tube boiler capable of saving energy and protecting the environment, which comprises a boiler shell, a containing box, a convection tube, a smoke-fire tube, a smoke separating wall, a combustion chamber and a convection tube flue, wherein high-temperature flue gas with two return trips firstly passes through a position with higher water temperature at the water side of the smoke-fire tube in the boiler shell for exchanging heat, then lower-temperature flue gas with three return trips passes through the convection tube with lower temperature at the water side of the convection tube flue for exchanging heat, and the flue gas is discharged out of the boiler body after the heat exchange; the original downstream heat exchanging means is completely changed; counter current heat exchange is realized; energy sources are saved; carbon dioxide emission is reduced; the purposes of saving energy and protecting the environment are achieved; the counter current heating exchanging water-fire tube boiler can be produced by adopting a normal boiler production technology; and the reconstruction of an existing boiler can be realized by only changing the flow of the flue gas.

The invention provides an environment-friendly flue gas circulation layer-burning boiler and a treatment method thereof. A boiler body of the layer-burning boiler internally comprises a first cavity and a second cavity, wherein the bottom of the first cavity communicates with the bottom of the second cavity. Coal adding openings/a coal adding opening are/is formed in the top and/or the side of thefirst cavity, a partition is arranged in the second cavity, and the partition is connected with the connecting portion of the first cavity and the second cavity. A steam pocket is arranged on the topof the second cavity, a rear arch is arranged on the portion, below the steam pocket, of the boiler wall of the second cavity, and burn-off tuyeres are formed in the end, close to the first cavity, of the rear arch. A first chain grate stoker is arranged on the lower portions of the first cavity and the second cavity. At least two air chambers are formed below the first chain grate stoker. A gasconveying device is arranged outside the layer-burning boiler. Pipelines in the gas conveying device are connected with a pyrolysis and gasification region and a semi-coke burning region. By means ofthe layer-burning boiler, emission of NOx, Co and other multiple pollutants can be effectively reduced, and the burn-off rate of dyestuff is increased.

The invention provides a grate-firing boiler with an in-boiler two-level dedusting device. The grate-firing boiler comprises a boiler body, a boiler hearth, a boiler grate, a front arch, a rear arch, a furnace arch, a crust block pipe separating device, a coal saver, an inertia separating device and an air preheater, wherein the boiler hearth, the boiler grate, the front arch, the rear arch, the furnace arch, the crust block pipe separating device, the coal saver, the inertia separating device and the air preheater are arranged in the boiler body. The grate-firing boiler is characterized in that the grate-firing boiler adopts twice separation, smoke is performed with primary separation through the crust block pipe separating device so as to separate most of crude particles and small amount of fine particles, and the crude particles and fine particles are rekindled after being fed into the boiler hearth through the furnace arch. The smoke performed with the primary separation moves downwards on the tail flue and then is returned back by the inertia separating device to be performed with secondary separation, the particles separated from the secondary separation are conveyed to the rear portion of the fire grate through air force to be rekindled. By means of the twice separation, mechanical incomplete combustion loss is reduced by 4%-6.5%, initial smoke discharging concentration of the boiler is reduced by more than 61%, abrasion of a tail heating surface is reduced, and continuous operation time of the device is added.

The invention relates to a counter current heat exchanging smoke-fire constant pressure boiler capable of saving energy and protecting the environment, which makes use of the counter current heat exchanging principle and comprises a boiler furnace, an upper smoke-fire tube, a lower smoke-fire tube, a boiler shell and a tube sheet, wherein high-temperature flue gas with two return trips firstly passes through a position with higher water temperature at the water side of the upper smoke-fire tube in the boiler shell for exchanging heat, then lower-temperature flue gas with three return trips passes through a position with lower water temperature at the water side of the lower smoke-fire tube in the boiler shell for exchanging heat. The flue gas is discharged out of the boiler body after the heat exchange; the original downstream heat exchanging means is completely changed; counter current heat exchange is realized; energy sources are saved; and carbon dioxide emission is reduced; as the constant pressure design is adopted, steel consumption is reduced, and the purposes of saving energy and protecting the environment are achieved; and the counter current heat exchanging smoke-fire constant pressure boiler can be produced by adopting a normal boiler production technology.

The invention discloses a low NOx emission variable cross-section circulating fluidized bed staged combustion boiler system and method. The system comprises a variable cross-sectional area furnace, afluidized bed activation chamber and a CO catalytic device; an upper flue gas outlet of the variable cross-sectional area furnace is connected with an adiabatic cyclone separator, the fluidized bed activation chamber is additionally arranged between a lower part returning mechanism of the adiabatic cyclone separator and a fuel-rich combustion chamber, the upper flue gas enters a vertical flue channel after discharging, and enters a supplementary air combustion chamber after heat exchange with a convection heat exchange surface; and a CO catalytic oxidation device is arranged on the downstreamof the supplementary air combustion chamber. According to the variable cross-section circulating fluidized bed boiler system, graded and efficient combustion of coal can be achieved, original emissionof NOx is reduced, and air pollution is reduced; to a certain extent, the problem of ash accumulation and slagging on the heating surface of the tail part is alleviated; returned materials are activated before entering a furnace, and the carbon conversion rate is improved; and an SCR denitrification device is eliminated, so that construction costs are saved, and problems such as catalyst deactivation and air preheater blockage caused by ammonia escape are avoided.

The invention relates to a device capable of improving the burning efficiency of a gas furnace by controlling oxygen content of exhaust gases from the gas furnace and application of the device. The device comprises an oxygen concentration sensor and a control module, wherein the oxygen concentration sensor is arranged at an exhaust outlet of the gas furnace and is used for detecting actual oxygen concentration in the exhaust gases from the gas furnace; the control module is respectively connected with the oxygen concentration sensor and the gas furnace and is used for setting an excess air coefficient in gas inlet of the gas furnace according to the target oxygen concentration of the exhaust gases from the gas furnace and correcting the excess air coefficient in the gas inlet of the gas furnace according to the target oxygen concentration and the actual oxygen concentration. Compared with the prior art, the device disclosed by the invention has the advantages that by setting and regulating the excess air coefficient, the concentration of oxygen in the exhaust gases from the gas furnace is reduced, unnecessary tail smoke exhaust hot loss or incomplete burning hot loss is reduced, the burning efficiency is improved, and eventually the aim of saving energy is achieved.

The invention belongs to the technical field of gas industrial boilers, and discloses a combustion method and system for achieving energy conservation and low nitrogen emission of a gas industrial boiler. The method comprises the following steps: firstly, controlling the generation of oxynitride and generating high-concentration carbon monoxide by adopting low-nitrogen combustion under the condition of a low coefficient of excess air in a furnace, and secondly, carrying out further catalytic reduction on nitrogen oxides in the flue gas in a flue region by utilizing incomplete combustion products such as carbon monoxide and soot particles in the flue gas as a reducing agent, and finally, incomplete combustion hydrocarbon substances remaining in the flue are eliminated in a catalytic combustion mode. A staged low-nitrogen combustion technology, a low-oxygen (low excess air coefficient) combustion technology, a hydrocarbon catalytic reduction denitration technology, a catalytic combustion technology and a deep flue gas waste heat recovery technology are organically combined, efficient combustion and low-nitrogen emission of the gas industrial boiler are achieved, meanwhile, the boiler efficiency is improved, and fuel consumption is reduced.