极端气象条件诱发的静电火灾事故分析与防范建议

针对重庆一家制药厂2006年9月3日22:00发生的一起火灾,利用GPS/MAT资料反演空气水汽含量产品和气象地面观测资料,并结合制药厂生产工艺,重点分析静电火灾事故原因。结果表明:高温低湿极端气象条件(空气中水汽含量达到0.5g/cm3、地表温度在40℃以上)是静电火灾发生的先决条件;生产工艺中防静电措施不合理,使静电产生和大量积聚,并产生火花放电,致使大量挥发的石油醚蒸汽燃烧而引发火灾,为减少类似静电火灾事故的发生,提出了相应防范建议以供参考。

Analysis and Preventive Countermeasures for Electrostatic Fire Accidents Caused by Extreme Weather Condition

Taking a fire accident in at a pharmacy company in Chongqing on the September 2006 as an example,the causes of the electrostatic fire accident are analyzed by using the meteorological ground observation data and water vapor content inferred from GPS/MAT data,in combination with the production processes of the company.The results show that the extreme weather condition of high temperature and low moisture（air vapour content being 0.5 g/cm3,and surface temperature above 40 ℃） is the precondition for the electrostatic fire;another important cause is the incorrect measures for electrostatic prevention,which made a great deal of static electricity accumulated,produced spark discharge,and then led to the burning of a large amount of volatile petroleum aether vapour.In order to decrease the occurrences of the like electrostatic fire accidents,some precaution suggestions are given.