This project is a renovation turnkey project, Mirshine is responsible for all work except civil construction and outlet CEMS including installation, maintenance and replacement of all process systems, pipes, valves, equipment, instruments and electrical equipment. The flue gas of this company adopts ammonia desulfurization and dust removal process, which ensures SO2≤35mg/Nm3, dust emission concentration≤10mg/Nm³ under design conditions. The flue gas treatment capacity of absorption tower is 260000m3/h(working condition). The desulfurization system is arranged near the cement chimney. The whole device meets the requirements of safety, environmental protection and industrial hygiene.