About IGCC Plant
Outline of IGCC Plant
|Capacity||543 MW (Gross)|
|Coal Consumption||Approx. 3,400 t/day|
|Efficiency (Net)||Approx. 48 % (LHV)|
|System||Gasifier||Air-Blown & Dry Feed Two Stage Entrained Flow|
|Gas Clean-up||Wet (Chemical Absorption) + Gypsum Recovery|
|Gas Turbine||Simple open cycle , single-shaft (1400℃ -class)|
|Flue Gas Properties||SOx||10 ppm (16 % O2 basis)|
|NOx||6 ppm (16 % O2 basis)|
|Particulate||5 mg/m3N (16 % O2 basis)|
IGCC is a new power generation system aiming at higher eﬃciency than conventional pulverized coal firing systems by integrating coal gasification with combined cycle power generation technology.
Trend of Coal-Fired Power Plants Efficiency
Improvement of thermal eﬃciency realizes fuel savings and reduction in CO2 emissions. The thermal eﬃciency of IGCC is higher than that of conventional pulverized coal firing systems.
Eﬀective Utilization of Low Ash Melting Point Coal
IGCC makes low ash melting point (1400℃ and under) coal available, while it is diﬃcult to use this for conventional pulverized coal firing systems.
Superior Environmental Performance
IGCC is more eﬃcient than conventional pulverized coal firing systems, and CO2 emissions are reduced by about 15%. IGCC can also reduce the volume of coal ash and the amount of cooling water discharge.
The volume of ash is reduced by around 50% since the ash is dissolved as glassy slag instead of coal ash. The slag can be recycled such as for cement components and road materials.
Air-blown IGCC has been developed for over 30 years in Japan.