Pulverized coal boilers are fully burned, and tail flue gas desulfurization is generally used directly. The limestone powder used for desulfurization is generally required to have a particle size of 250 mesh or 325 mesh.

For desulfurization inside and outside the circulating fluidized bed furnace, the desulfurizer limestone powder fineness is required to be 1mm-0.045mm (for desulfurization inside the furnace) and 0-0.045mm (for desulfurization outside the furnace).

As a provider of overall solutions for grinding equipment, Zenith Machinery has launched the MTW European version grinding mill and LM vertical roller mill for the field of power plant desulfurization based on its nearly 40 years of R&D and manufacturing experience. On the original basis, the system is optimized, the fan is adjusted, the powder selector is optimized, and secondary classification equipment is added. It can simultaneously produce limestone powder of different particle sizes to meet the needs of different desulfurization processes. It is widely used in the limestone-gypsum flue gas wet desulfurization process (FGD) and the preparation of limestone desulfurizers inside and outside the CFB circulating fluidized bed boiler furnace.