Sub-high Temperature & Sub-high Pressure Power

Simple and compact in structure, it has the combustion system made up of water cooling air ventilation system, coal feeding device, under bed ignition system, high-temperature heat insulation cyclone separator, and U-shaped non-mechanical sealing feedback device. It adopts section combustion in the ratio of 6:4 or dependent on coal type; the first blast is sent from wind box under air distributor and the second one, from combustion room layer by layer. Section combustion can effectively reduce the discharge amount of NOx. Besides, appropriate limestone can be added to the boiler according to the sulfur content of fuel for desulfurization within the boiler. The boiler combustion efficiency is up to 99.5%; its heat efficiency, 85-92%; the carbon contents of fly ash and bottom ash are below 8% and 20% respectively. It is able to use various coals with different volatile matters and net calorific value ranging 8,400-24,300KJ/Kg. It can mix fuels with lower calorific value, such as gas furnace slag, chain slag, coal water slurry, etc. or gas fuels, such as coal gas, methane, etc.