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为了预防气体静电火灾,有必要对气体静电火灾的原因和条件作一些分析。 纯净的气体,即使流动也不易产生静电。但气体中往往含有悬浮杂质,因此在气体喷射时,悬浮物与气体之间、悬浮物的颗粒之间、悬浮物与喷嘴之间及其它物体之间均会产生强烈的摩擦,这样就会使气体产生静电,并且气体中所含的杂质越多,喷射的速度越快,产生的静电也越多。 常见的气体带电有以下几种:高压蒸汽冲洗油舱或储槽时,蒸汽与空气中的油雾高速冲击摩擦,使油粒产生大量负电荷,与接地体产生火花放电,造成油汽爆炸。过去,国外曾有三艘油轮在同一个月内相继沉没的事件,其原因就是在喷射高压蒸汽冲洗油舱时发生爆炸而造成的。
In order to prevent gas electrostatic fire, it is necessary to make some analysis on the causes and conditions of gas static fire. Pure gas, even if the flow is not easy to produce static electricity. However, the gas often contains suspended impurities, so when the gas is injected, there is a strong friction between the suspended matter and the gas, between the particles of the suspended matter, between the suspended matter and the nozzle and between other objects, The gas generates static electricity, and the more impurities contained in the gas, the faster the jet, resulting in more static electricity. Common gas charged are the following: When high-pressure steam flushing the tank or tank, the high-speed impact friction between the steam and the air mist, the oil particles produce a large number of negative charges, spark discharges with the grounding body, resulting in oil-gas explosion. In the past, there were three overseas oil tankers that successively sunk in the same month. The reason for this was the explosion caused by jetting high-pressure steam to flush the tank.