Novolen聚丙烯工艺中载气分离塔的改造

Technical Improvement of Carrier gas Splitter in Novolen PP Technology

本装置开车以来载气分离塔运行不正常,塔压、塔顶和塔底温度达不到设计要求,塔顶冷凝器冷却效果不好,轻组分中丙烯含量大.通过对塔顶管线的改造,塔底丙烯得到提纯,塔顶轻组分中丙烯含量由35.76％～83.4％降到6.48％以下.

The carrier gas splitter didn＇t work properly from the test running of PP device, the pressure and temperature of carrier gas splitter didn＇t reach design value, the cooling effect of Splitter condenser was not good. By technical improvement, propylene from the bottom of the splitter was purified, and propylene in the overhead of the splitter decreased from 35.76 %-83.4 % to 6.48 % （volume ratio）.