Directing against the problems occured on a tower type boiler of 500 MW unit due to ash deposition and fouling on the heating surface

such as ash falling

fireout

reducing of boiler efficiency

local overtemperature and tube-burst on the heating surface etc.

a monitoring system of boiler's heating surface fouling has been established

realizing real-time on-line monitoring of the heating surface fouling situation.Under the stable load condition

a test of soot-blowing has been carried out on said heating surface.Through analysis of the test results

and combined with the operation situation of the soot-blowing system

the fouling behavior of different main heating surfaces in the said boiler has been found.Based on these

a scheme of retrofitting acoustic soot-blowers and optimizing the existing steam soot-blowers has been put forward.After implementation

the operating situation of soot-blowing system is good

boasting remarkable economic benefit.