دانلود مقاله Effect of Seeding Operation on the Dynamic Strength of Urea Prills in Petrochemical Plants
سال انتشار: ۱۳۸۶
محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی
تعداد صفحات: ۱۱
Bahman ZareNezhad – Department of Chemical and Petroleum Engineering, Shiraz University of Technology, Shiraz, Iran
Effect of seeding operation on the dynamic strength of urea prills is investigated in a large scale urea production unit of a petrochemical plant. According to experimental results the mean dynamic strength of 88 wt% well above the recommended value of 85 wt% can be obtained if a seed composition of 450 ppmw with the mean seed size of 20 µm is used for seeding operation. A semi empirical correlation for description of the seeding process is also presented. The predicted prill dynamic strength is always within ± ۳٫۳% of the measured value.