车载木材熏蒸污染物扩散预测及污染防治措施

摘要

As a special form of pollution emissions,the fumigation gas of CH 3-Br discharged by log in train causes serious damage to the nervous system and respiratory system of human and animals.This paper took Tongjiang log fumigation site for example,selected body source model of AERMOD to simulate the diffusion of fumigation pollution and analyzed the impact of pollution.Results showed that high concentration of CH3-Br was centered in the surroundings of fumigation lines and most occurred at night.The farther away from the fu-migation line,the lower the excess standard rate of CH 3-Br.With the prediction and the calculated maxi-mum distance,pollution control measures were proposed for the fumigation field.%车载木材熏蒸散气是一种特殊形式的污染排放,其排放的熏蒸气体溴甲烷对人和动物均可造成严重的神经系统及呼吸系统损害.以同江木材熏蒸场为例,通过分析车载木材熏蒸工艺和散气特点,选择aer-mod模式系统中的体源模式进行熏蒸污染扩散模拟,并进行污染影响分析.结果表明：溴甲烷高值质量浓度集中在熏蒸线周围,并多发生在夜间;离熏蒸线越远,溴甲烷超标率越低.结合熏蒸气体溴甲烷的预测结果和最大超标距离计算,提出熏蒸场环境防护距离和污染防治对策.