Optimum Design of Separator for Uranyl Nitrate MVR-Evaporation Process
In view of the problem that metal impurities were introduced into the product due to the corrosion of 304L stainless steel packing in the rectification section of the separator of uranyl nitrate MVR evaporation system,using Aspen Plus simulation software,the operating conditions of the separator were determined.Through calculation and optimization,it was determined that the theoretical number of plates required for the separator was 19 and the reflux ratio was 0.072 6.At the same time,the distribution curves of temperature,pressure and acidity in the separator were obtained.The simulation results showed that the acidity of the feed liquid below the 11th plate exceeded 0.3 mol·L-1.At the high temperature of 99℃,the electrochemical corrosion of 304L stainless steel was strong.According to the simulation results,the combination of stainless steel and ceramic filler was selected to slow down the corrosion of filler.
NETL
NSTL
万方数据
维普
