硫酰氟气体浓度衰减与仓房气密性相关性研究

Research on the Correlation between the Attenuation of Sulfuryl Fluoride Gas Concentration and the Air Tightness of Warehouses

为了解不同气密性仓房硫酰氟熏蒸过程中的浓度衰减规律,选取5个不同气密性储粮仓房,通过熏蒸过程中的硫酰氟浓度监测,分析和比较气体浓度衰减半衰期和仓房气密性的相关性。结果显示,当仓房气密性为143 s时,最长浓度半衰期为8.5 d;当仓房气密性为53、46 s时,最高浓度半衰期分别为2.7、4.6 d。无法检测出气密性的仓房气体浓度半衰期约在2~3 d。硫酰氟气体浓度越高,衰减速度越快,但研究并未发现气体浓度衰减与仓房气密性呈现明显规律。

In order to understand the concentration decay law of sulfuryl fluoride fumigation in warehouses with different airtightness,five warehouses were selected in this experiment.Through the concentration monitoring during the fumigation process,the correlation between the decay half-life of the gas concentration and the air tightness of the warehouses is analyzed and compared.The results show that when the airtightness of the warehouse is 143 s,the maximum concentration half-life is 8.5 d,while with the airtightness of 53 s and 46 s,the maximum concentration half-life are 2.7 d and 4.6 d,respectively.The half-life of gas concentration in warehouses where air-tightness cannot be detected is about 2~3 d.The higher the concentration of sulfuryl fluoride gas,the faster the decay speed,however the concentration decay process does not show a certain connection with the air tightness of the warehouses.