可燃性液体的爆炸性.请帮忙看下吧？ 我们公司的标准，所有储罐都要静电接地浮头罐，罐顶要和罐壁相接，电势差应小于10ohms（浮头罐在filling或者discharging的时候都有可能产生火花）就像3楼所提到的， 特别在搅拌、打料，出料或者从上面人孔取样时，罐中容易产生火花，特别是对于导电率在0.1-10 (ps/m)的液体，（一般所有的hydrocarbon）。在罐顶取样的人员要不是自己的接地，还有取样瓶的接地，有过人在人孔取样，结果把火花带进储罐，最后人被炸出去的案例。关于打料的速度和等待时间，以下是我总结的，我就不翻成中文了the hydrocarbon transfer can generate static electricity accumulation. so in the following cases, high initial flow rates shall be avoided: when tank inlet is not covered by liquid, when the roof is not floating above the liquid, when influx liquid is containing second phase. the recommended flow rate for these specials moment is 1m/s.object introduction in charged less conductive liquid can create an electrostatic discharge. a relaxation time shall be envisaged before introducing objects to ensure that the electrostatic load of the liquid can disperse: after the loading of a tank or after operations of mixturethe discharge process is called relaxation, and relaxation time is often expressed as the time required for a given charge to decrease to half its original value. if this time is very short, large static potentials in the bulk fuel are not created because the relaxation process takes over and controls the charge that can build-up. relaxation time depends primarily on the conductivity of the liquid. it can vary from a second to many minutes. for fixed storage tank, it’s about thirty minutes, for coaches or tankers: 5 to 7 minutes. 查看更多
第1天
关注盖德视界
添加小助手
