34results about How to "Reduce incomplete combustion losses" patented technology

The present invention relates to the layered decoupling coal buring technological and mechanical layered decoupling furnace. Coal is burned in the combustion chamber to produce fume exhausted to gasifying chamber or flue and semi-coke conveyed to the mechanical grate of gasifying chamber; the coal on the semi-coke layer is ignited from the bottom, burnt in anoxic condition and gasifying pyrolyzed; NOx in the fume is reduced into N2; and after being mixed with the second draft, CO and smoke black are burnt out. The separated burning in the mechanical layered decoupling furnace produces lowered pollutant exhaust and high burning efficiency.

The invention discloses a front coal gasification grate-firing device and a combustion method thereof. By the aid of the front coal gasification grate-firing device and the combustion method thereof, the problems of emission of the high NOx content and the high SOx content of traditional chain layer burners are solved, and the boiler efficiency is improved. The front coal gasification grate-firing device comprises a coal bucket, a coal gasification chamber and a coke discharge pipe which are communicated sequentially, a gas pipe is arranged at the top of the coal gasification chamber, an injection nozzle is arranged inside the gas pipe, communicated with a secondary air pipeline through an injection air pipeline and parallel with the secondary air pipeline, an opening of the injection nozzle faces towards a hearth, the secondary air pipeline and the gas pipe are arranged in parallel in an up-and-down mode and communicated with the hearth, a bottom bellows is installed at the bottom of the coal gasification chamber, communicated with a gasification air pipeline and communicated with the coal gasification chamber through a fire grate I, the fire grate I is inclined towards the inlet direction of the coke discharge pipe, a coke breaking machine is installed at the position of an inlet of the coke discharge pipe, and an outlet of the coke discharge pipe is located above a fire grate II at the bottom of the hearth.

The invention particularly aims to the technical field of boiler air preheating. A disclosed air preheating and flue gas waste heat utilizing system comprises a flue gas channel (17), an air channel (20), an air preheater (9), a condensed water flue heat exchanger (8) and a condensed water air channel heat exchanger (19), and further comprises a condensed water feeding main pipe (15) and a condensed water returning main pipe (12); the flue gas channel (17) and the air channel (20) are connected with the air preheater (9); the condensed water flue heat exchanger (8) is arranged on the flue gas channel (17) at the back of the air preheater (9) in a flue gas flowing direction; the condensed water air channel heat exchanger (19) is arranged on the air channel (20) at the front of the air preheater (9) in an air flowing direction. According to the air preheating and flue gas waste heat utilizing system, flue gas discharge and heat exchange can be automatically adjusted according to change of operation conditions; on the premise of ensuring the safety of a heated surface and the regular operation of the system, the maximization of the heat circulation efficiency and the system economical efficiency is ensured.

The invention provides a control system for the flue gas oxygen content of a layer combustion boiler based on flue gas recirculation. The control system is mainly composed of the layer combustion boiler, a blower, a flue gas recirculation fan, a zirconium oxide analyzer, an air pipe, a DCS system (or a PLC system) and the like, and can be widely applied to the field of combustion control and combustion optimization of layer combustion boilers. The control system adopts conventional equipment, performance is reliable and stable, stable operation of the boiler under the very low load (the 30% rated load) can be achieved, ash accumulating of the heating surface of the tail of the boiler is reduced, the initial discharge concentration of boiler nitrogen and oxygen compounds can be reduced by 15-20%, and the heat efficiency of the boiler under the low load is improved by 5% or more.

The invention discloses a pulverized coal co-combustion system of an industrial boiler. With the system, layer combustion and suspension combustion can form in a furnace. The system includes a boiler, a raw coal supply device and a co-combustion device. The boiler comprises a furnace, a coal inlet located at the lower part of a front end wall, and a chain grate disposed at the lower part of a furnace inner chamber. The raw coal supply device is connected to the coal inlet through a coal hopper. The co-combustion device is arranged at the boiler tail, and is composed of a boiler-front mill, a pulverized coal combustor and a pulverized coal conveying pipe. The boiler-front mill includes a rotation shaft running through a primary milling chamber, an intermediate milling chamber and a fine milling chamber connected in order, a primary hammer type impeller, an intermediate hammer type impeller and a final hammer type impeller. The front end wall upper part of the primary milling chamber is provided with a coal inlet, and the chamber wall upper part of the fine milling chamber is provided with a pulverized coal nozzle. The pulverized coal combustor includes a combustor body and a combustion nozzle. The combustor body is equipped with a secondary air inlet and a pulverized coal inlet. And the pulverized coal conveying pipe connects the pulverized coal inlet of the combustor body and the pulverized coal nozzle of the boiler-front mill.

The invention relates to a supercritical CO2 circular and elliptical tangential boiler furnace body with uniform thermal loads. A furnace hearth comprises a burner cavity. The cross section of an inner cavity of the burner cavity is circular or elliptical. At least one burner assembly is axially arranged in the burner cavity, and the burner assembly comprises a first deflection secondary air nozzle, a primary air nozzle, a second deflection secondary air nozzle and a direct current secondary air nozzle which are arranged in a spaced manner from bottom to top successively. A SOFA air nozzle isarranged on a cavity wall of the burner cavity. An air path system comprises a primary air fan, a secondary air fan, a coal mill and a secondary air distributor. An outlet of the primary air fan and apulverized coal outlet of the coal mill are connected to the primary air nozzle through a primary air pipe. An air outlet of the secondary air fan is connected to the first deflection secondary air nozzle, the second deflection secondary air nozzle, the direct current secondary air nozzle and the SOFA air nozzle separately. The supercritical CO2 circular and elliptical tangential boiler furnace body has the advantages that the thermal loads in the furnace hearth are uniformly distributed axially and radially, so that overtemperature of a heated surface of the boiler furnace is avoided.

A large-scale water-fire tube hot water boiler of double-barrel transverse vertical type threaded flue relates to a water-fire tube hot water boiler. The aim of the invention is to settle the problems of ash accumulation, hard ash elimination, and reduced thermal efficiency of boiler in the prior water-fire tube hot water boiler. A burnout chamber, a convection calandria and a vertical threaded flue coal economizer are provided in the boiler body. The convection calandria is communicated with the upper barrel and the lower barrel. A warm water area and a hot warm water area are installed in the upper barrel. A first connecting pipe is communicated with a lower box of water cooled wall of back wall and the lower drum. A second connecting pipe is communicated with a lower drum and a vertical threaded flue coal economizer. A third connecting pipe is communicated with a hot water area and the vertical threaded flue coal economizer. The down pipe of water cooled wall of front wall is communicated with a lower collection box of water cooled wall of front wall and the cold water area. The down pipe of left wall is communicated with a lower collection box of water cooled wall of left wall. The down pipe of right wall is communicated with a lower collection box of water cooled box of water cooled wall of right wall. The large-scale water-fire tube hot water boiler of double-barrel transverse vertical type threaded flue according to the invention adopts the vertical threaded flue coal economizer and has the advantages of no ash accumulation in the threaded flue, easy ash elimination and high thermal efficiency of boiler.

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 an incineration boiler integrated system for efficiently treating high-calorific-value garbage, and relates to the technical field of garbage incineration equipment. The systemcomprises a fire grate frame, the fire grate frame is provided with a water-cooling hearth, a fire grate arranged on the fire grate frame is arranged in the water-cooling hearth, the upper end of thewater-cooling hearth is provided with a smoke outlet, a garbage inlet is arranged at the front end of the water-cooling hearth, a slag outlet is arranged at the rear end of the water-cooling hearth,and the smoke outlet of the water-cooling hearth is connected with a flue set. The fire grate frame is provided with the water-cooling hearth so that the high-calorific-value household garbage can betreated, a scheme is provided for the treatment of the high-calorific-value garbage at present, the heat of the garbage can be utilized to the maximum, and the heat efficiency is high.

The invention discloses a powdery straw cleaning combustor. The combustor comprises a combustor body, wherein the combustor body comprises a combustor shell, a combustion chamber and a flue gas outlet, wherein the combustion chamber and the flue gas outlet are positioned in the combustor shell; the combustion chamber comprises a cylindrical part and a conical part, the combustion chamber is near to the flue gas outlet, the combustor shell is provided with a primary air inlet pipeline and a secondary air inlet pipeline, the primary air inlet pipeline is axially parallel to the combustion chamber, the secondary air inlet pipeline is tangent to the cylindrical part of the combustion chamber, a nozzle of the secondary air inlet pipeline is located on the inner wall of the combustion chamber oris close to the inner wall of the combustion chamber, and a cylindrical backflow cone is arranged at the junction of the flue gas outlet of the combustion chamber and the cylindrical part of the combustion chamber. The powdery straw cleaning combustor has the advantages of lean combustion and liquid slag discharge, the combustor is compact in structure, high in outlet smoke cleanliness and uniform in temperature field, good in combustion stability, small in solid incomplete combustion loss, less in emission of Nox and particulate matters, and the powdery straw cleaning combustor has importantsignificance in promoting the development of renewable energy sources and reducing the emission of pollutants.

The invention relates to a natural circulation type hot water boiler structure comprising a hearth. The natural circulation type hot water boiler structure is characterized in that a cyclone separator is arranged at an outlet of the hearth, the outlet end of the cyclone separator is communicated with a horizontal flue, a tail vertical shaft is arranged at one side of the horizontal flue, an economizer is installed in the tail vertical shaft, an air preheater is installed at the bottom part of the tail vertical shaft, and a flue gas outlet is arranged at the lower part of the air preheater; and an economizer header is installed at the lower part of the economizer, the economizer header is connected with a boiler barrel at the upper end of the hearth by a connecting pipe, a boiler pipe is connected with a lower header of a water cooling wall by a centralized downcomer at the outside of the hearth, the lower header of the water cooling wall is connected with a water inlet of the water cooling wall, a water outlet at the upper end of the water cooling wall is connected with the boiler barrel, and a water outlet of the boiler barrel is connected with the hot water outlet header at the top part of the tail vertical shaft. According to the natural circulation type hot water boiler structure, the height of the tail vertical shaft is decreased, the height of the hearth is decreased, the metal consumption quantity of the boiler main body is reduced, the imperfect combustion loss of the boiler machinery is reduced, and the boiler efficiency is improved.

The invention discloses a combustion system and method of an inverted-alpha shaped flame air distribution type layered boiler, and belongs to the technical field of boilers. The combustion system comprises a front arch, a rear arch, a fire grate and an air distribution system, wherein the front arch and the rear arch are separately arranged aslant; the top height of the front arch is less than that of the rear arch; the rear arch is shorter than the front arch; an included angle of the front arch and the rear arch is an obtuse angle; the front arch, the rear arch and a partitioning plate are divided into a front zone and a rear zone, the front zone is a combustion zone and the rear zone is a cooling area; the air distribution system comprises a main pipe, air blowers, a fume exhaust pipe and a plurality of air distribution pipes; the fume exhaust pipe and one end of each of the plurality of air distribution pipes are connected with the main pipe; the other end of each of the pluralityof air distribution pipes extends into a combustion chamber from the front arch or the rear arch; an adjusting valve is arranged on the each air distribution pipe; the other end of the fume exhaust pipe extends into a cooling fume exhaust zone, the main pipe communicates with an air pre-heater of an existing boiler; and the air blowers are separately arranged on the main pipe and the fume exhaustpipe. According to the system and the method disclosed by the invention, generation of nitrogen oxide can be reduced, and fume exhaustion loss is reduced.

The invention relates to the technical field of coal-fired blast furnaces, and discloses a pulverized coal distributor for a coal-fired blast furnace. The pulverized coal distributor comprises an airinlet main pipe, wherein a bottom inclined body is fixedly mounted at the top of the air inlet main pipe, and an upper sealing cover is fixedly mounted at the top of the bottom inclined body through bolts. Through the arrangement of a first distribution chamber, a movable vertical pipe and a second distribution chamber, primary air entering from the air inlet main pipe and pulverized coal carriedby the primary air are divided into two parts with different concentrations, concentration separation of the pulverized coal is achieved, after the pulverized coal is uniformly distributed in the first distribution chamber and the second distribution chamber, the pulverized coal is conveyed into a boiler from a first distribution air pipe and a second distribution air pipe, the ignition temperature and the ignition heat of the concentrated pulverized coal are low, so that the concentrated pulverized coal is ignited firstly and then the low-concentration pulverized coal is ignited, and the low-load warm combustion capacity of combustion is improved; and meanwhile, stable ignition of inferior coal can be realized, the combustion efficiency is improved, the blast furnace operation cost is reduced, and the utilization rate of inferior coal is increased.