What are the factors that affect the effective utilization of limestone in a CFB boiler?

　　Limestone undergoes a gas-solid reaction with SO2 in the circulating fluidized bed combustion chamber. Controlling the particle size of limestone is the key to ensuring the desulfurization effect of the circulating fluidized bed boiler. In addition, limestone activity, bed temperature range, calcium-sulfur molar ratio, and fine particle capture capacity of the recycling system are all important factors to ensure the effective utilization of limestone.