What kinds of desulfurizers are commonly used in circulating fluidized bed boilers?

　　Commonly used desulfurizers for circulating fluidized bed boilers include limestone (CaCO3), quicklime (CaO), dolomite (CaMg(CO3)2) and carbide slag containing Ca(OH)2. From a profit point of view, most circulating fluidized bed boilers use limestone as a desulfurizer. When dolomite or limestone containing a small amount of MgCO3 is used as a desulfurizer, the amount of MgO calcined in the furnace by MgCO3 is very small, which is usually not considered. When carbide slag is used as a desulfurizer, because the particle size of calcium carbide slag is very fine, the separation efficiency of the separator is an important factor affecting the desulfurization effect.