The advantages of CDSI system are small investment, high efficiency and simple desulfurization process. The whole unit covers a small area, which can not only be used for desulfurization of new boilers, but also more suitable for technical transformation of existing boilers. CDSI technology is pure dry desulfurization, which will not cause secondary pollution, and the reaction products will be removed by the dust removal equipment together with the soot and transported out in a unified way Outside the factory.