Desulfurization characteristic of calcium-based sorbent during activation process

A mathematics model is proposal for simulating desulfurization process in a CaO activation reactor of a limestone injection FGD system. The effective factors, including particle motion, water evaporation, particle impact, and aqueous sorbent reaction, have been considered in this model. By use of ca lculating results and experimental results from a 3000 N .m(3)/h pilot plan t experimental system of CaO activation reactor, the effect of flue gas tem perature, particle size, water injection and Ca/S molar ratio on desulfuriz ation efficiency is investigated in detail. It is found that desulfurizatio n efficiency rises with the increase of Ca/S molar ratio, the amount of wat er injection and the decrease of particle size, flue gas temperature. A met hod to improve desulfurization efficiency in the CaO activation reactor is also given in this paper. The above results are a help for semi-dry FGD sys tem design.