The method of concentrating an aqueous sodium hydroxide solution using the evaporation equipment and the equipment aqueous solution of sodium hydroxide

摘要

PROBLEM TO BE SOLVED: To provide an evaporative concentration facility of an aqueous caustic soda solution constituted by connecting an evaporator and a vapor-liquid separator while providing a compact evaporative concentration facility overall and securing an ultimately high droplet collection efficiency within the vapor-liquid separator.;SOLUTION: The provided multiple-effect evaporative concentration facility of an aqueous caustic soda solution is an evaporative concentration facility of an aqueous caustic soda solution furnished with: an evaporator for heating an aqueous caustic soda solution so as to evaporate water therefrom; and a vapor-liquid separator for separating a concentrated liquid having been heated and concentrated within the evaporator from water vapor, in which a plate-type heat exchanger is used as the evaporator.;COPYRIGHT: (C)2014,JPO&INPIT