聚乙烯粉粒产品贮槽闪爆事故分析

本文详细地分析了上海石化总厂塑料厂高压聚乙烯产品在管道运输与贮槽贮存过程中,由于粉粒摩擦产生静电放电进而引起闪燥事故的各种因素,测定了粉粒分布、各种静电参数以及在粉尘与乙烯气体混合情况下在空气中爆炸的下限等大量数据,最后认为塑料厂高压车间的三次贮槽闪爆事故系静电放电所引起。作者希望采用静电、粉尘和可燃气的自动监控,采取爆炸卸压和爆炸遏制的措施,以防止爆炸事故。

An Analysis on the Flash Explosion of polyethylene powder in Storing Slot

This article gives a detail analysis on the factors which caused the flash explosion in the plastic Factory of The Shanghai General petrochemical plant during static-electricity discharging due to the friction of powder granules in the procedure of high pressure polythylene product transportation in the pipe and its storage in the storing slot. It also shows the measurement results of the granule distribution, the perameters of all kinds of staticelectricity as well as the lower limit for the mixture of dust and ethylene gas to explose in the air. At last, the article comes to a conclusion that all the three flash explosion happened in the storing slot of the hihg pressure workshop of the plastic Factory were caused hy the staticelectricity discharge. The authors hope to prevent the kind of accident by using automatic static-electricity, dust and flamable gas monitor and by adopting some measures to relief and contain the explosion.