The results showed that recirculation fumigation under film can effectively improve airtightness of the warehouse and control stored grain insects.
结果表明，采用膜下环流熏蒸可有效提高仓房的气密性，取得良好的熏蒸杀虫效果。
Recirculation fumigation equipment was used to ventilation after the warehouse was rebuilt in gastight and heat insulated.
将仓房进行气密和隔热改造后，利用环流熏蒸设备，进行环流通风。
Owing to reasonable duct distribution, PH3 can distributed uniformly and the PH3 concentration reached quickly effective standard. The difficult problem on fumigation in large warehouse was solved.
由于内环流管网风道布置合理，熏蒸气体在高大粮堆中均匀分布，各部位PH3浓度快速达到有效浓度，解决了高大平房仓的熏蒸难题。
Owing to reasonable duct distribution, PH3 can distributed uniformly and the PH3 concentration reached quickly effective standard. The difficult problem on fumigation in large warehouse was solved.
由于内环流管网风道布置合理，熏蒸气体在高大粮堆中均匀分布，各部位PH3浓度快速达到有效浓度，解决了高大平房仓的熏蒸难题。
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