Coal Fired CFB (Circulating Fluidised Bed) Boiler Manufacturer China

Reckoned as one of the most prominent industrial boiler suppliers in China. All our boilers including gas and oil fired boiler, biomass fired boiler and coal fired boilers are precisely designed, followed by extensive research. Designed with excellence, our coal fired boilers can exactly ensure perfect performance in its daily operating.

Coal fired boiler types

Coal fired boiler is a typical type and has been used in industries for hundreds of years. Chain grate coal fired boiler and circulating fluidized bed coal fired boiler are the main kinds. Of particular note, the CFB type coal fired boiler is much more efficient than a chain grate type one, one of our 116MW CFB coal fired boiler reached a quite high efficiency of 91.98%!

coal fired circulating fluidized bed boiler 

Coal fired CFB (Circulating Fluidised Bed) boiler

Coal is mixed with sand and limestone/dolomite (to absorb SOx pollutant gases). Coal is combusted with the help of hot primary air from air pre-heater. However, here, coal doesn't combust violently resulting into flames, but rather the heat resulting from combustion is instantaneously exchanged with the water tubes running through the coal-bed-air suspension bed. Thus, the combustion of coal takes place at a relatively lower temperature of around 850-900 deg C, necessitating lower thermal insulation of the boiler compared to PC boiler.

Advantages of coal fired CFB boiler:

1. Lower combustion temperature translates into lower thermal insulation needs of the boiler, directly resulting in savings.
2. As most of the SOx gases are absorbed by the bed, flue gases can be cooled to lower temperatures than PC boiler, thereby increasing the amount of potential heat exchange.
3. Unburnt coal particles are recycled back with the help of cyclone separators. These separators separate heavy unburnt coal particles from the lighter ash particles by centrifugal action. The unburnt coal is then fed back into the bed for combustion. This results in direct savings on fuel.

If you are seeking for a coal fired boiler, ranging from 2 ton to 400 ton, contact us and we will do our best to make a perfect solution for you! Visit www.zbgboiler.com or email to zbgboiler@zzboiler.com