The Quality of Steam Condensate as Related to Sodium Sulphite in the Boiler Water

Test data and conclusions are given in this paper which relate to the effect of various concentrations of sodium sulphite on the quality of condensed steam from high-pressure central-station boilers. Increase in sodium sulphite beyond certain limits was found to lower appreciably the pH and to raise the conductivity of the condensed steam. The acid material found in the steam resembles sulphurous acid. Test data, procedures, and equipment are described.