CFB boiler is designed for customers, who use the boiler fuel with wide range, different characteristics, but small size. The available fuel is biomass fuel such as bulk straw or stalks, shaped biomass fuel.
Special design of CFB biomass power station boiler
1.Furnace and secondary air:
There are some obvious differences between biomass boiler and coal boiler account of low-density, low heat valve, high volatile content and high moisture of the biomass fuel. So the biomass boiler must have the larger combustion space and enough height to make sure the fuel have the sufficient time to burn in the furnace, meanwhile the adequate and stratified secondary air is deployed to fit in with the concentrated combustion of volatile content, so that guarantees the fuel and air fully mixed to burn out in the furnace.
Because part of the CI in biomass fuel must be transformed into HCI and CI2, avoiding superheater deposit or ash is an effective measure to reduce the extent of corrosion in superheater, which is caused by the interaction of alkali metal salt, CI2 and HCI. This series of boilers use platen superheater as its high-temperature superheater to essentially avoid deposit or ash in superheater, eliminate one of the reasons that might cause the corrosion to the high-temperature superheater.
3. The layout of the heating surface in the tail part and soot blower:
Because the strong agglutinating value of the deposit or ash is remained after the combustion of the biomass fuel. For one thing, during the course of design, the heating surface should be reasonably laid out to maintain flue gas temperature of the inlet of high-temperature superheater within a lower level. For another, the tubes of high-temperature superheater adopt heating-resisting material, and soot blower should be reasonably laid out to prevent high-temperature superheater from deposit or ash.
After reading Circulating Fluidized Bed biomass boiler for power station, i guess that you have a basic knowledge of features of biomass CFB power station boiler. If you have requirement of CFB biomass boiler, please contact us.