Flue gas circulating fluidized bed semi-dry desulfurization method

The invention relates to a flue gas circulating fluidized bed semi-dry desulfurization method which comprises the following steps: carrying out desulfurization treatment on flue gas with the initial temperature of 140-160 DEG C to obtain desulfurized flue gas with the temperature of 85-95 DEG C, wherein a desulfurizing agent in the desulfurization treatment comprises quick lime and slaked lime in a mass ratio of 1: (6-7.5). According to the desulfurization method provided by the invention, by improving the temperature of the flue gas treated in the process and the proportion of the desulfurizing agent, the problems of material sticking of a desulfurizing tower, material sticking of a return hopper and large consumption of the desulfurizing agent in the prior art are solved, the phenomenon of material sticking is completely eliminated by adopting the scheme, shutdown treatment caused by material stickingis avoided, and the consumption of the desulfurizing agent in the prior art is reduced. 本发明涉及一种烟气循环流化床半干法脱硫的