安全与环境工程2024，Vol.31Issue(4)：37-44,8.DOI:10.13578/j.cnki.issn.1671-1556.20221673
CO2驱动下NaHCO3对甲烷爆炸特性的影响
Effect of NaHCO3 on methane explosion characteristics driven by CO2
摘要
Abstract
To study the impact of NaHCO3 powder concentration on the explosion characteristics of meth-ane-air gas mixture driven by CO2,we conducted an explosion suppression test in a 1 m3 spherical explosion vessel.In this test,we used a methane-air gas mixture with an equivalent ratio of 1 and different concentra-tions of NaHCO3 powder to suppress methane explosion driven by CO2.By evaluating the maximum explo-sion pressure,maximum pressure rise rate,time to reach the maximum pressure,and flame speed,we ana-lyzed the explosion suppression effect of various NaHCO3 powder concentrations driven by CO2.The find-ings are as follows:under the current test dusting pressure,the jet gas creates turbulence disturbances,while the jet air enhances methane explosion;however,the jet CO2 exhibits a certain inhibitory effect,mak-ing it a more suitable driving gas;as the concentration of NaHCO3 powder increases,its inhibitory effect be-comes more pronounced;lower concentrations yield poor inhibition.For instance,the addition of 100 g/m3 NaHCO3 powder only reduces the maximum explosion pressure of methane by 18.7％.However,when the concentration surpasses 200 g/m3,the inhibition effect becomes evident;additionally,we conducted thermo-gravimetric analysis to explore the mechanism of methane explosion suppression by NaHCO3 powder driven by CO2.Both physical and chemical aspects are taken into consideration.关键词
甲烷爆炸/NaHCO3粉体/CO2驱动/抑爆效果/爆炸特性Key words
methane explosion/NaHCO3 powder/driven by CO2/explosion suppression effect/explosive characteristic分类
资源环境引用本文复制引用
吴君安,朱杭钦,梁志星,冯泓,张苏..CO2驱动下NaHCO3对甲烷爆炸特性的影响[J].安全与环境工程,2024,31(4):37-44,8.基金项目
福建省自然科学基金项目(2020J01505) （2020J01505）
