对CZDM膜制氮机组降氧工艺与氧气浓度变化规律进行了研究,利用CZDM膜制氮机组产生的低氧浓度气体,采用一系列降氧工艺使试验仓粮堆内的氧气浓度从20.9%降低到2.0%共用去408h。各工艺阶段粮堆平均氮气(氧气)浓度变化与该工艺前粮堆平均氮气(氧气)浓度和该工艺充入粮堆氮气浓度差成正比。本研究结果为开展低氧防治储粮害虫技术的应用提供了参考依据。 The process of oxygen reduction and the variation of oxygen concentration in CZDM membrane nitrogen plant were studied. By using a series of oxygen reduction process, the oxygen concentration in the experimental warehouse was reduced from 20.9% by using the low oxygen concentration gas produced by CZDM membrane nitrogen unit. To 2.0% share to 408h. The average nitrogen (oxygen) concentration of the grain piles at each process stage is directly proportional to the difference between the average nitrogen (oxygen) concentration of the piles before the process and the nitrogen concentration of the process fed to the piles. The results of this study provide a reference for carrying out the application of hypoxic control of stored grain pests.