摘要
甲烷报警器精准探测可以预防甲烷气体泄漏造成的火灾爆炸事故,然而油烟等恶劣环境对其报警效果会产生一定影响。针对上述问题,研究讨论了油烟对催化燃烧式甲烷报警器的响应特性如量程指示偏差、报警动作值以及报警重复性的影响,并对影响规律进行了分析。结果表明:相比于无油烟环境,有油烟环境会使量程指示偏差变大,当箱体甲烷浓度为12%LEL时,油烟浓度为7.30 mg/m^(3)时甲烷报警器的量程指示偏差增加了4.95%;相对于无油烟环境,油烟环境会使报警动作值变大,油烟浓度为7.30 mg/m^(3)时的报警动作值相比于无油烟时增长了4.01%;另外,同时还研究了油烟和温度耦合环境对甲烷报警器响应特性的影响,结果发现随着环境温度的升高,量程指示偏差和报警动作值均增大。研究为进一步解决油烟对甲烷气体报警器影响提供实验依据,有利于提高甲烷气体泄漏的精准探测从而预防火灾爆炸事故的发生,保障城市生命线安全。
The accurate detection of methane alarms can prevent fire and explosion accidents caused by methane gas leakage,but a harsh environment like lampblack will have an impact on its alarm effect.Given the above problems,the influence of oil fume on the response characteristics of catalytic combustion methane alarm,such as range indication deviation,alarm threshold,and alarm repeatability,is analyzed.The results show that,compared with the environment without oil fume,the range indication deviation will be larger in the smoky environment.When the tank methane concentration is 12%LEL,the range indication deviation of the methane alarm is increased by 4.95%when the oil fume concentration is 7.30 mg/m^(3).In addition,compared with the environment without oil smoke,the alarm threshold will increase in the environment without oil fume.When the oil fume concentration is 7.30 mg/m^(3),the alarm threshold increases by 4.01%compared with that without oil fume.At the same time,the influence of fume and temperature coupling environment on the response characteristics of methane alarm is also studied,and it is found that with the increase of environmental temperature,the range indication deviation and the alarm threshold both increase.This study provides an experimental basis for further solving the impact of lampblack on methane gas alarm,which is conducive to improving the accurate detection of methane gas leakage so as to prevent the occurrence of fire and explosion accidents and ensure the safety of urban lifeline.
作者
焦伟豪
聂士斌
张红
徐良骥
刘小勇
JIAO Weihao;NIE Shibin;ZHANG Hong;XU Liangji;LIU Xiaoyong(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;School of Public Safety and Emergency Management,Anhui University of Science and Technology,Hefei 231131,China;Institute of Energy,Hefei Comprehensive National Science Center(Anhui Energy Laboratory),Hefei 230000,China;Hefei Institute of Public Safety,Tsinghua University,Hefei 230601,China)
出处
《火灾科学（中英文）》
CAS
北大核心
2024年第2期103-111,共9页
Fire Safety Science
基金
安徽高校协同创新项目(GXXT-2022-018)
安徽省重点研发与开发计划项目(2023g07020001)
安徽省自然科学基金项目(2208085QE148)
安徽省高等学校科学研究项目(KJ2021A0460)。
