Contemporary views of Corrosion and Performance Related Issues in Modern Coal Fired Boiler

Abstract

Water and coal are the basic consumable raw materials for the continuous, around the clock, production of high purity steam at high temperatures and pressures. Whilst water undergoes a reversible physical trnasformation of state only, the combustion of pulverised coal is a destr-uctive chemical process involving (i) release of thermal energy and of the mineral matter of coal as ash, (ii) formation of the oxides of carbon, hydrogen, sulphur as products of combustion and (iii)the concomittant form-ation of environment polluting gases, NOX and SOX