Transformation on No.2 unit in a power plant was conducted

namely replacing the designed fuel Huainan Datong bituminous coal for biomass.According to the combustion characteristic of biomass

and on the principle of not changing the heating surface and keeping the original structure of chain grate and furnace

necessary retrofitting on feeding system

draft fan system and air ducts was performed.After modification

the furnace with cold flow field was full filled with gas

and no gas deflection occurred after the primary air entered.The airflow distribution was uniform and no slagging appeared on the water wall and superheater.