惰化系统极限氧浓度变化规律及监测预警研究

doi:10.16265/j.cnki.issn1003-3033.2018.01.013

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (1): 75-80.doi: 10.16265/j.cnki.issn1003-3033.2018.01.013

惰化系统极限氧浓度变化规律及监测预警研究

周宁¹ 副教授, 王宇飞¹, 赵会军¹ 教授, 纪虹¹ 讲师, 袁雄军¹ 讲师, 刘晅亚² 研究员

1 常州大学石油工程学院,江苏常州 213016
2 公安部天津消防研究所科技处,天津 300381

收稿日期:2017-10-16 出版日期:2018-01-28 发布日期:2020-09-28
作者简介:周宁 (1977—),男,四川仁寿人,博士,副教授,主要从事爆炸与冲击动力学、油气爆炸安全等方面的研究。E-mail:zhouning@cczu.edu.cn。
基金资助:
国家重点研发计划(2017YFC0806600、2017YFC0805100);江苏省高等学校自然科学研究重大项目(17KJA440001);公安部科技项目(2016JSYJD04);天津市科技计划项目(16ZXCXSF00080)。

Study on change regulation of limit oxygen concentration and monitoring early warning system for inerting system

ZHOU Ning¹, WANG Yufei¹, ZHAO Huijun¹, JI Hong¹, YUAN Xiongjun¹, LIU Xuanya²

1 College of Petroleum Engineering, Changzhou University, Changzhou Jiangsu 213016,China
2 Department of Technology,Tianjin Fire Research Institute of the Ministry of Public Security, Tianjin 300381,China

Received:2017-10-16 Online:2018-01-28 Published:2020-09-28

摘要/Abstract

摘要： 为解决高龄油气管罐事故多发且事故后果严重的问题,通过研究惰性气体保护封存技术,提出惰化系统氧浓度等级分级、氧浓度安全裕量设定原则以及极限氧浓度(LOC)测试方法;通过理论与试验相结合的方法,分析CO₂、N₂等2种惰化剂对液化石油气(LPG)爆炸极限与LOC的影响以及抑制机制,并基于此设定预警阈值。结果表明:随着CO₂、N₂量的增加,最大爆炸压力到达时间延时可达7倍,抑爆效果明显,2种惰化剂抑爆机制的不同主要体现在三元碰撞反应;当CO₂充入量达到22%或N₂充入量达到32%时,LPG处于完全惰化状态;根据试验结果,可设定LPG惰化系统在线和间断氧浓度监测时预警阀值。

关键词: 爆炸性气体, 爆炸极限, 极限氧浓度(LOC), 监测预警, 惰化防爆

Abstract: In order to solve the problem of frequent accidents with serious consequences involving oil gas pipe tanks at their old age, this paper was aimed at developing an inert gas protection and sealing technology. A method for oxygen concentration classification of inerting system, an oxygen concentration safety margin setting principle and a LOC test method were proposed. The influences of CO₂ and N₂ on explosion limits of liquefied petroleum gas(LPG) and LOC were studied theoretically and experimentally. The restraining mechanism was analyzed. Warning thresholds were set. The results indicate that there is a positive correlation between the maximum explosion pressure arrival time and the volume fraction of CO₂ or N₂, the ratio of the time delayed to that undelayed could reach 7 depending on the fraction, that the mechanisms of explosion suppression of the two inert agents are different, which is mainly reflected in ternary collision reaction, that when the volume fraction of CO₂ is 22% or that of N₂ is 32%, LPG is completely in a state of inertia, and that the early warning valve values could be set according to the experimental results for LPG inerting system on-line monitoring and oxygen concentration monitoring.

Key words: explosive gases, explosion limit, limit oxygen concentration(LOC), monitoring and warning, inert explosion-proof

中图分类号:

X932

周宁, 王宇飞, 赵会军, 纪虹, 袁雄军, 刘晅亚. 惰化系统极限氧浓度变化规律及监测预警研究[J]. 中国安全科学学报, 2018, 28(1): 75-80.

ZHOU Ning, WANG Yufei, ZHAO Huijun, JI Hong, YUAN Xiongjun, LIU Xuanya. Study on change regulation of limit oxygen concentration and monitoring early warning system for inerting system[J]. China Safety Science Journal, 2018, 28(1): 75-80.

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惰化系统极限氧浓度变化规律及监测预警研究

Study on change regulation of limit oxygen concentration and monitoring early warning system for inerting system

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