[Study on the calcium-based sorbent for removal fluorine during coal combustion].

In the paper, the reaction of CaO HF and fluorine removal mechanics at high temperature by blending calcium based sorbents with coal during coal combustion were discussed, and test results about fluorine retention during coal combustion in fluidized bed and chain grate furnace were reported. The results identified that lime and calcium based sorbets developed can restrain the emission of fluorine during coal combustion. The efficiency of fluorine removal can reach 66 7%～70 0% at Ca/F 60～70 by blending lime with coal in fluidized bed combustion, and the efficiency of fluorine removal are between 57 32% and 75 19% by blending calcium based sorbets with coal in chain grate furnace combustion. Blending CaO or lime with coal during coal combustion can remove SO 2 and HF simultaneously.