Reduction of SO_2 emissions from A fluidized bed under staged combustion by fine limestone

摘要

This paper considers the effects of operating variables on SO_2 emission in staged combustion with a stainless steel combustor 2 m high with a 0.3 x 0.3 m cross section. Fluidizing air was supplied through a multihole distributor. The experiments were carried out for fluidizing velocities of 1-2 m/s, bed temperature of 830-880 deg.C, 20-40/100 excess air, and bed particle sizes of 0.313 and 0.655 mm. The bed temperature, fluidizing velocity, and excess air level had a significant effect on SO_2 emissions reduction during staged combustion.