SO₃ Migration and Emission Characteristics of CFB Boilers

In order to study the migration and transformation of SO 3 from circulating fluidized bed boiler (CFB) in air preheater flue gas treatment facilities, 10 boilers with installed capacities between 150 MW 330 were measured by controlled condensation method. Ten ranging using It is showed that removal rate was affected exit temperature, which ranged 6.7 % 36.5 %, rotary higher than tubular preheater. The cloth bag filter electric above 40 %; electrostatic precipitator 6.1 10.8 %. wet desulfurization method ranges 41.7 73.4 highest double tower cycle. off-furnace CFB semi-dry reached 89.7 %~97.9 dry process inside furnace + could reduce at outlet below 0.3 mg/m under tested conditions. conclusions test analysis this paper can provide reference for control related policy formulation.