The Simulation for Ammonia Rectification Columnin Ammonia Rectifying Process

This paper simulated the ammonia rectification column in ammonia rectifying process by Aspen Plus software as the platform.Through the simulation for stage numbers,feeding stage,reflux ratio and feed heat state,did a research for the influence feature of every parameter.Concluded that a little more stage numbers is better,feeding stage took advantage while approaching the bottom,reflux ratio was fixed on by product quality firstly,feed temperature near bubble point had better.Set stage number 8,feeding stage number 6,feed temperature 100 ℃,reflux retio 1,sensitive stage 7,got the result of ammonia mole fraction in liquid ammonia from the column top 99.5%,and that of residual liquid from the column bottom5%,which exactly conformed to design specification.