Abstract

Abstract Hydrogen sulphide was first detected in the gases discharged from the air ejector of the main condenser of No. 7 unit at Springdale Station of West Penn Power Company about 6 months after the unit was placed in service. The story of potassium sulphite and its connection with this unit will form the first part of this paper. Silica deposition on the turbine blades was quite rapid, and after 8 months operation it was necessary to sandblast the silica from the blades. The search for the source of this silica, together with the information found and the corrections applied, will also be discussed.

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