Abstract
Entrusted by NEDO, IGC Research Association has conducted the R&D of an IGCC power system from 1986 to 1996.
Nakoso IGCC pilot plant is composed of an air blown gasifier, hot gas clean-up facilities (fluidized bed, fixed bed and moving bed types), and a gas turbine for low calorie coal gas.
After its mechanical completion in March 1991, test operation of the plant was started gasifying a domestic and two Australian coals.
Overcoming various difficulties such as the slagging in the gasifier, cumulative operating hours of the gasifier exceeded 4, 700 hours, including the continuous operation of 789 hours.
Almost all of the results such as the HHV of the product gas, cold gas efficiency of the gasifier, desulfurization and dedusting efficiencies of the gas clean-up facilities and load following capability of the plant, are satisfactory to the target values.
