狭长密闭空间高硫天然气泄漏组合控制效果研究  

Composite Control Effect of High-sulfur Natural Gas Leakage in Closed Narrow-long Space

作　　者：邓奇根[1,2,3] 杨炎杰 李伟华 任闯难 DENG Qi-gen;YANG Yan-jie;LI Wei-hua;REN Chuang-nan(School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control(Henan Polytechnic University),Jiaozuo 454003,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo 454003,China;Puguang Branch of Zhongyuan Oil Field,SINOPEC,Dazhou 636156,China)

机构地区：[1]河南理工大学安全科学与工程学院,焦作454003 [2]河南理工大学瓦斯地质与瓦斯治理国家重点实验室培育基地,焦作454003 [3]煤炭安全生产与清洁高效利用协同创新中心,焦作454003 [4]中国石化中原油田普光分公司,达州636156

出　　处：《科学技术与工程》2023年第10期4463-4468,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51774116);河南省高等学校青年骨干教师培养计划(2019GGJS052)。

摘　　要：为研究底板排气、通风及挡烟垂壁对狭长密闭空间高硫天然气泄漏控制效果,利用ANSYS Fluent 19.2软件模拟多种工况下硫化氢摩尔含量为5%的高硫天然气持续泄漏60 s后硫化氢及甲烷分布特征。分析底板排气速度、通风风速及挡烟垂壁下垂高度对泄漏高硫天然气分布影响规律。结果表明:增设挡烟垂壁使泄漏高硫天然气形成涡流,挡烟垂壁下垂高度应设置为0.5 m;当底板排气速度为4.0 m/s,采用0.63 m/s通风能将泄漏高硫天然气限制在泄漏口所在挡烟垂壁区间,为最优组合;通风及底板排气系统能在高硫天然气云团表面形成空气膜,可防止高硫天然气大范围扩散。In order to study the control effect of bottom exhaust,ventilation and ceiling screen on the leakage of high-sulfur natural gas in closed narrow-long space,ANSYS Fluent 19.2 software was used to simulate the distribution characteristics of hydrogen sulfide and methane in high sulfur natural gas with hydrogen sulfide mole content of 5%after 60 s continuous leakage under various working conditions.The influence of bottom exhaust velocity,ventilation velocity and the sagging height of ceiling screen on the distribution of high-sulfur gas leakage were analyzed.The results show as follows.The addition of ceiling screen will lead to the formation of vortex cluster of high-sulfur gas leakage.The sagging height of ceiling screen shall be set to 0.5 m.When the floor exhaust velocity is 4.00 m/s,0.63 m/s ventilation can limit the leakage of high-sulfur natural gas to the ceiling screen section where the leakage port is located,which is the optimal combination of prevention and control.The ventilation system and bottom exhaust system can form air film on the surface of high-sulfur gas vortex,which can prevent the large-scale diffusion of high-sulfur gas.

关 键 词：仿真模拟 硫化氢 底板排气 通风 挡烟垂壁 

分 类 号：X937[环境科学与工程—安全科学]