There are a lot of silicon impurities left in the pipeline of the newly built and overhauled units. The water quality of the boiler water exceeds the standard and the steam quality is unqualified after the boiler is raised. This paper discusses a silicon washing method in the operation of the units. The silicon washing agent of high parameter boiler hot state is used to wash the silicon

which can quickly dissolve the silicon impurities in the thermal system and make the water quality reach the national standard in a short time. It has been successfully applied in the power plant

the actual problem of unqualified water quality is solved.