statitic analysis of the variation regularity between exhaust gas temperature and boiler efficiency has been made
and the effect of sootblowing on boiler efficiency and boiler economic behavior being studied. The economic benefit of a boiler for 600MW unit has been calculated
the expenses having been cutdown about 2.47 million RMB per year only by putting the sootblowers of heat recovery surface into operation for lowering the exhaust flue gas temperature. The variation of the exhaust flue gas temperature is a key factor affecting the operation of sootblowers.