purging在句中的意思? in order to control the magnitude of the exotherm, the ethylene treater is filled in stages by purging at low pressure with a stream of ethylene diluted with nitrogen. 为了控制放热量,乙烯处理塔用经过氮气稀释的乙烯进行低压吹扫,分阶段进料(乙烯)。 说明:氮气是惰性不起反应的,乙烯进料中加了氮气会降低放热量。 查看更多