UNIT-I ==> pulverized coal, Ash Handling System
Pulverized coal: Coal is pulverized (powdered) to increase its surface exposure thus permitting rapid combustion. The efficient use of coal depends greatly on the combustion process employed. For large-scale generation of energy, the efficient method of burning coal is confined still to pulverized coal combustion. The pulverized coal is obtained by grinding the raw coal in pulverising mills. The various pulverising mills used are as follows: ( i ) Ball mill ( ii ) Hammer mill ( iii ) Ball and race mill ...