高、低压脱丙烷塔长周期运行优化

Optimization of long period operation of high and low pressure depropanizer

通过对比某石化公司裂解2套装置高、低压脱丙烷塔设计参数及实际运行参数,结合前脱丙烷前加氢工艺中高、低压脱丙烷塔参数及聚合反应机理,判断出影响高、低压脱丙烷塔平稳运行的主要因素是高、低压脱丙烷塔釜容易出现聚合结垢现象,导致塔分离效果下降,并针对此影响因素采用优化工艺控制系统、提高检修质量及优化药剂注入量等措施,对高、低压脱丙烷塔进行优化,稳定工艺运行参数,抑制聚合反应的发生,保证装置长周期运行。

By comparing with the design parameters and actual operation parameters of high and low pressure depropanizer of a 2 nd cracking unit in a petrochemical company,combined with parameters and polymerization mechanism of high and low pressure depropanizer in hydrogenation process before depropanization,it could be judged that the main factor to influence the smooth operation of high and low pressure depropanizer was the aggregation fouling phenomenon in tower kettle,leading to the decrease of the tower separation effect.This paper adopted the methods of optimizing process control system,improving maintenance quality and optimizing agent injection amount in regard of these factors,optimized the high and low pressure depropanizer,stabilized process operation parameters,inhibited the occurrence of polymerization reaction so s to ensure the long period operation of the unit.