Study on Water Quality Control for Marine Turbine Plants and Its Automation (II): Boiler Water Concentration Control and Deoxidizer Plant Effects

摘要

It is very important for realizing the automatic water quality treatment to analyze the behavior of water quality of marine turbine plant. Following the first report, which investigated the change of pH and phosphate ion concentration in boiler water, this second report studies the influence of hydrazine on the water quality of marine steam turbine plant. In this study, the authors analyze theoretically the concentrations of chloride ion, silica and electric conductivity of boiler water, and also pH and electric conductivity of feed water. The analysis can reveal the maximum allowable concentration of residues in boiler water so that it makes possible to control the blowing-down appropriately. And the analysis shows some characteristics of boiler water quality and its treatment system, which are to be helpful to marine engineers.