Effect of Ash in Coal on the Performance of Coal Fired
18/08/2006#0183;#32;At an ash content of 75% in coal, the effects on the system (without fuel oil support) follow: (a) decrease in Hardgrove index from 80 to 44; (b) 20% of the specific energy consumption (SEC) of induced draft (ID) fans, 10%12% of that of forced draft (FD) and primary air (PA) fans, 17% of that of drum mills, and 12%13% of that of ballrace mills and bowl mills, are accounted for by wear