During production of polypropylene with intermittent liquid-phase mass polymerization, there produced a lot of wastewater containing drain off water from annular pump, chilled water for shaft seal and overflow from hot-water tank. 在利用间歇式液相本体法工艺生产聚丙烯时,易产生大量废水,包括闪蒸水环真空泵排放水、聚合釜轴封冷却水排放水、聚合升温用热水罐溢流水等。