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本文在PH_3和CO_2仓外混合熏蒸杀虫可行性研究的基础上,利用粮堆气流运动规律,使PH_3分子均匀地分布于粮层各部位。根据离进气口距离不同、混合气体压力衰减规律设计出孔径和开孔率各异的杀虫管道安置于粮面,以PH_3和CO_2混合间歇熏蒸杀虫,提高了杀虫效果。
Based on the feasibility study of mixed fumigation and insecticide with PH_3 and CO_2, this paper makes use of the law of airflow movement of grain piles to make PH_3 molecules distribute evenly in every part of the grain layer. According to the different distance from the inlet, the pressure attenuation law of mixture gas is designed to dispose insecticidal pipe with different aperture and opening ratio on the grain surface. The insecticidal effect is improved by intermittent fumigation with PH_3 and CO_2.