The semi-dry process mixing tower, part of the Guizhou 75T stainless steel boiler tail gas treatment system, is currently under fabrication. This tower features a flue gas handling capacity of 30,000–140,000 m³/h, with calcium oxide (CaO) powder as the treating agent. The flue gas residence time is more than 1 second, and the flue gas temperature ranges from 180°C to 200°C. The tower is constructed from 316L stainless steel.

Fabrication of Guizhou 75T Stainless Steel Drying Tower