煤自燃环境磷氮系抑爆剂抑制多元可燃气体爆炸机制研究

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (3): 398-404.

煤自燃环境磷氮系抑爆剂抑制多元可燃气体爆炸机制研究

张术琳1, 文拙1, 鲁义1, 杨明瑞2

（1. 湖南科技大学资源环境与安全工程学院，湖南湘潭 411201；2. 应急管理部天津消防研究所，天津 300381）

出版日期:2024-03-15 发布日期:2024-03-15
作者简介:张术琳(1992- )，山东烟台人，湖南科技大学资源环境与安全工程学院讲师，博士，主要从事煤矿热动力灾害防治方面的研究，湖南省湘潭市雨湖区桃园路，411201。
基金资助:
基金项目：国家自然科学基金青年项目(52304215)；湖南省自然科学基金青年项目(2023JJ40292)；湖南省教育厅科学研究项目(22C0240)；湖南科技大学博士后科研项目(E62203)

Study on the mechanism of multiple combustible gas explosion suppression by phosphorus-nitrogen series explosion suppressant in coal spontaneous combustion environment

Zhang Shulin1, Wen Zhuo1, Lu Yi1, Yang Mingrui2

(1. School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Hunan Xiangtan 411201, China;2. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China)

Online:2024-03-15 Published:2024-03-15

摘要/Abstract

摘要： 利用CHEMKIN软件，建立了磷氮系抑爆剂磷酸二氢铵(ABC)、三聚氰胺氰尿酸盐(MCA)抑制甲烷/乙烯/氢气多元可燃气体爆炸化学反应动力学模型，并进行数值模拟计算。模型包含多元可燃气体燃烧的化学反应动力学模型和磷氮系抑爆剂热分解的化学反应动力学模型，共61种组分和259步基元反应。根据模拟计算得到多元可燃气体各关键组分摩尔分数变化、反应平衡时温度变化、氢自由基和羟基自由基摩尔分数变化、温度敏感性系数变化等数据，探究关键抑爆组分并对其反应路径进行分析，揭示抑爆剂的抑爆机制。结果表明，ABC和MCA均对多元可燃气体有较好的抑爆效果，且抑爆效果随ABC和MCA比例的增加而增强，ABC抑爆效果优于MCA。两种抑爆剂皆可通过促进H基和OH基结合，生成更加稳定的H2O从而达到抑爆效果，其中ABC的主要抑爆机制为HOPO和PO2形成2HOPO?PO2抑制循环，消耗大量H基与OH基生成更稳定的H2O，切断链式反应从而抑爆；MCA的主要抑爆机制为HNCO消耗H基和OH基生成H2O，切断链式反应从而抑爆。

关键词: 煤自燃, 多元可燃气体爆炸, 磷氮系抑爆剂

Abstract: Uses the CHEMKIN software to establish a kinetic model of the chemical reaction of the explosion of methane/ethylene/hydrogen multiple combustible gases suppressed by phosphorus-nitrogen series explosion suppressants, including ammonium dihydrogen phosphate (ABC) and melamine cyanurate (MCA), and conducts numerical simulation calculations. The model includes the kinetics model of the chemical reaction of multiple combustible gas combustion and the kinetics model of the thermal decomposition of phosphorus-nitrogen series explosion suppressants, with a total of 61 components and 259 elementary reactions. According to the simulation calculation, the mole fraction changes of each key component of the multiple combustible gas, the temperature changes at the reaction equilibrium, the mole fraction changes of hydrogen free radicals and hydroxyl free radicals, and the changes of temperature sensitivity coefficients were obtained to explore the key explosion suppression components and analyze their reaction pathways. This reveals the explosion suppression mechanism of the explosion suppressant. The results show that both ABC and MCA have good explosion suppression effects on multiple combustible gases, and the explosion suppression effect increases with the increase of ABC and MCA proportions, and the explosion suppression effect of ABC is better than MCA. Both explosion suppressants can achieve explosion suppression by promoting the combination of H radicals and OH radicals to form more stable H2O. The main explosion suppression mechanism of ABC is the formation of the HOPO and PO2 forming 2HOPO?PO2 suppression cycle, consuming a large amount of H radicals and OH radicals to produce more stable H2O, and cutting off chain reactions to suppress explosions. The main explosion suppression mechanism of MCA is that HNCO consumes H radicals and OH radicals to produce H2O and cut off chain reactions to suppress explosions.

Key words: coal spontaneous combustion, multiple combustible gas explosion, phosphorus-nitrogen series explosion suppressant

张术琳, 文拙, 鲁义, 杨明瑞. 煤自燃环境磷氮系抑爆剂抑制多元可燃气体爆炸机制研究[J]. 消防科学与技术, 2024, 43(3): 398-404.

Zhang Shulin, Wen Zhuo, Lu Yi, Yang Mingrui. Study on the mechanism of multiple combustible gas explosion suppression by phosphorus-nitrogen series explosion suppressant in coal spontaneous combustion environment[J]. Fire Science and Technology, 2024, 43(3): 398-404.