流化床稀相区淤浆停留时间和蒸发时间的计算

以Hypol聚丙烯工艺第三反应器为例，计算了淤浆液滴在气相流化床反应器稀相区的平均蒸发时间和平均停留时间，并讨论这2个计算值之间的关系，结果表明，淤浆液滴在流化床稀相区，液相丙烯已完全蒸发，因此适量增加淤浆量，进一步提高反应器产率是可能的，扬子石油化工公司聚丙烯装置B线扩容改造后，丙烯循环量增加，而流化床流化态稳定，本文提供了理论依据。

The calculation of mean evaporation time and residence time of the slurry in the dilute phase of fluidized bed

The mean evaporation time and residence time for the liquid droplet in the dilute phase of fluidized bed were calculated with the formulas given in this paper by taking the third gas reactor in Hypol polypropylene (PP) process as an example. The relation between the two calculated values was also discussed. The results showed that the liquid propylene inside the PP slurry droplet was completely evaporated in the dilute phase of the fluidized bed. Because the PP polymerization heat could be removed in the evaporation process of the slurry, it was possible to increase the production rate by raising the slurry quantity fed into the third gas reactor. The present paper provided the theoretical basis for the capacity expansion of the Production Line B in Yangzi Petrochemical Co, Ltd.; the cyclic quantity of propylene was increased and the fluidized state of the fluidized bed was kept stable after the revamping.