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Active protection of work area against explosion of dust–gas mixture
International Journal of Coal Science & Technology Pub Date : 2021-01-01 , DOI: 10.1007/s40789-020-00387-0
Zbigniew Szkudlarek , Sebastian Janas

Potentially explosive atmosphere can occur not only in the production systems of the food, energy, chemical and petrochemical industries but also in the production processes of the mining industry. Gases, vapours, mists and dusts arise can escape in an uncontrolled way during production, processing, transportation and storage of flammable substances. In combination with oxygen, they create explosive atmospheres that, if ignited, lead to an explosion causing catastrophic damage to people's lives and property. To protect against the results of hazardous dust–gas mixtures explosions in a confined work space, where employees can stay, various control and protection mechanisms are used in the form of an active explosion-proof system. The article presents the results of tests on an active system for limiting the effects of ignition of gas and/or dust based on a highly efficient explosion suppression system—equipped with an ignition detection system, high-pressure fire extinguisher and a power supply and trigger system. Smokeless powder was used as the explosive charge and sodium bicarbonate as the suppressive material. Tests of the effectiveness of the active explosion suppression system were carried out on two devices: a small-size dry dust collector and a zone extinguishing system adapted for direct explosion suppression in closed working spaces. In both cases, the explosion suppression process took place through the action of extinguishing powder blown out of the fire extinguisher after membrane perforation by compressed combustion products.



中文翻译:

主动保护工作区域,防止粉尘-气体混合物爆炸

潜在的爆炸性气氛不仅会出现在食品,能源,化工和石化行业的生产系统中,而且还会出现在采矿业的生产过程中。在生产,加工,运输和储存易燃物质的过程中,产生的气体,蒸气,雾气和粉尘会以不受控制的方式逸出。与氧气结合,会形成爆炸性气氛,如果点燃,会导致爆炸,从而对人们的生命和财产造成灾难性破坏。为了防止有害的粉尘-气体混合物在员工可以居住的狭窄工作空间中爆炸的结果,采用了主动防爆系统形式的各种控制和保护机制。本文介绍了基于高效爆炸抑制系统的主动系统上的测试结果,该系统用于限制气体和/或粉尘的着火效果,该系统配备了点火检测系统,高压灭火器以及电源和触发器系统。使用无烟粉末作为炸药,使用碳酸氢钠作为抑制剂。主动抑爆系统有效性的测试是在以下两种设备上进行的:小型干粉尘收集器和适于在封闭工作空间内直接抑爆的区域灭火系统。在两种情况下,爆炸过程都是通过灭火剂的作用来实现的,该灭火剂是通过压缩燃烧产物在膜上穿孔后从灭火器中吹出的。

更新日期:2021-01-01
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