Abstract
For steam turbine ships, it is very important to control accurately water quality of the main boiler and its plant. The recovery rate of condensed water in recent marine turbine plants has been increasing and approaching a perfect closed cycle, and the techniques of pH monitoring and Fresh Water Generators have been improved too. However, as for the automation of boiler water treatment, its development seems to be very late compared to other ship techniques.
This paper investigates, therefore, the current situation of the water quality control of marine turbine plant in order to develop an automatic water treatment system. As the fundamental research on the boiler water quality control and its automatic water treatment, this first report analyzes theoretically the water treatment data of actual ship for making clear the impacts of (1) impurity mixing from make-up water (2) boiler compounds (3) blow-down of boiler water on boiler water quality, especially pH and PO4. The analysis shows some characteristics of boiler water quality and its treatment system which are to be helpful to marine engineers.
