摘要
介绍了苯的特性和其对人体造成的危害,苯检测器的类型以及半导体型检测器和光致电离型检测器的测量原理和使用场所。从苯检测器的采样方式分析了扩散式采样方式和泵吸式采样方式的优缺点,苯检测器的选型要求、不同类型苯检测器的适用场所、"质量浓度"单位与"ppm浓度"单位的换算方法等。根据标准GB 50493—2009《石油化工可燃气体和有毒气体检测报警设计规范》中苯的最高容许浓度(MAC)值和短时间接触容许浓度(PC-STEL)值,结合苯蒸气检测现场经常遇到的测量干扰问题,对苯蒸气检测器的测量范围和报警设定值提出了建议和要求。
The characteristics of benzene, the harm of benzene to people after poisoning and measuring mechanisms and applications of benzene testing instruments such as semi-conductor tester and photo ionization tester are described in detail. The advantages and disadvantages of sampling by diffusion and pump suction are analyzed. The selection of benzene testers, applications of different benzene tester and conversions between ＂mass concentration＇ and ppm are introduced. The measurement range of benzene vapor tester and set point of alarm are recommended based upon the maximum allowable concentration of benzene and allowable concentration of benzene in short-time contact （PC-STEL） in national standard GB 50493-2009 ＂Standard for Design of Testing and Alarming of Inflammable Toxic Gas in Petrochemical Industry＂ and in consideration of disturbances in the testing site.
出处
《炼油技术与工程》
CAS
2012年第11期62-64,共3页
Petroleum Refinery Engineering
关键词
苯
容许浓度
检测方法
PID
真空紫外线
VOC蒸气
benzene, allowable concentration, testing method, PID, vacuum ultra violet （VUV） , VOC steam
