1998 Volume 41 Issue 4 Pages 1023-1028
The IHI flue gas desulfurization system was completed for a new 700 MW coalfired boiler in December 1995. The system is now operating very smoothly, achieving a removal efficiency of more than 90% for SO2 and more than 85% for particulates. 100% availability has been maintained so far. Special features of the system are as follows: 1.A simultaneous SO2 and particulates removal absorber with a forced oxidation system is used, which is the largest spray tower ever built in Japan. 2.Two variable pitch axial flow fans are positioned downstream of the absorber(C-Position). 3.Optimum FGD control system is installed to minimize the operating cost for AFC(automatic frequency control) operation of the power plant.