爆炸性环境气体和蒸气混合物类别的确定  

Classification of explosive atmospheres gas and vapor mixtures

作　　者：张嘉嘉 王睿[2] ZHANG Jiajia;WANG Rui(Sinopec Engineering Incorporation,Beijing 100101,China;China Mobile Heilongjiang Co.,Ltd.,Harbin Branch,Harbin 150001,China)

机构地区：[1]中国石化工程建设有限公司,北京100101 [2]中国移动通信集团黑龙江有限公司哈尔滨分公司,黑龙江哈尔滨150001

出　　处：《电气应用》2020年第11期24-27,共4页Electrotechnical Application

摘　　要：石油化工装置经常处于易燃、易爆区域,爆炸危险区域划分显得尤为重要。在石油化工装置的部分设备中,爆炸性气体或蒸气是以混合物的状态存在的。根据GB 50058和GB 3836.11中相关条文,确定气体混合物的类别,一般先特别测定最大实验安全间隙(MESG)或者最小点燃电流比(MICR),然后再确定类别。即当气体混合物中含有氢气时,由于氢气体积百分数的不同,也会出现将该气体混合物划分为IIB类或IIC类的情况。文章将对含氢气的气体混合物类别划分予以探讨并得出结论。Petrochemical installations are often flammable and explosive areas.Classification of explosion hazard area is particularly important.Explosive gas or vapor exists in the state of mixtures in part of the equipment in petrochemical installations.According to the relevant provisions of China national standard GB 50058 and GB 3836.11,the types of gas mixtures are determined.The maximum experimental safety gap(MESG)or minimum ignition current ratio(MICR)should be determined first,and then the classification should be determined.When hydrogen is contained in a gas mixture,the gas mixture may also be classified into class IIB or class IIC due to the different percentage of hydrogen gas volume.This paper will discuss the classification of gas mixtures containing hydrogen and draws conclusions.

关 键 词：爆炸危险区域划分 气体混合物 体积百分数 

分 类 号：TE65[石油与天然气工程—油气加工工程] TQ116[化学工程—无机化工]