安全、健康和环境2025，Vol.25Issue(8)：37-43,7.DOI:10.3969/j.issn.1672-7932.2025.08.005
对二甲苯-空气混合过程燃爆危险性分析与安全控制措施
Explosion Hazards Analysis and Control Measures for p-Xylene-Air Mixing Process
摘要
Abstract
The gas-phase oxidation of p-xylene is an environmentally friendly and green process.However,there is a possibility of explosion during the mixing process of p-xylene with air,and the safety of the process se-riously restricts the industrialization process.Through research on the explosion process of p-xylene under mixed conditions,it was clearly determined that the explosion limit of p-xylene was 0.87%to 6.85%at 190℃and 183 kPa(A),and the mixed process should be operated within an explosion range.Combined with the abnor-mal working conditions of uneven mixing,the flammability and explosion characteristics parameters of p-xylene at different concentrations were obtained,and a correlation model between concentration and explosion index was established.Based on the explosion index classification,a critical concentration of flammability and explo-sion risk during the mixing process was proposed,and p-xylene concentration below 1.28%exhibits low explo-sion risk.According to the maximum explosion pressure of p-xylene,the explosion venting design of the oxida-tion reactor was carried out,with a minimum venting area of 3.234 m2.Eight groups of bursting discs with a di-ameter of 750 mm were selected to avoid overpressure in the reactor caused by combustion and explosion during the mixing process.The mixing process of the p-xylene gas-phase oxidation process had a relatively high risk of explosion.By setting up a high-p-xylene concentration interlock cut-off feed and multiple sets of bursting discs,the process safety can be effectively enhanced,providing a safety guarantee for the engineering application of the para-xylene gas-phase oxidation process.关键词
对二甲苯/混合过程/燃爆风险/临界浓度/泄爆设计Key words
p-xylene/mixing process/explosion risk/critical concentration/venting design分类
化学化工引用本文复制引用
周明川..对二甲苯-空气混合过程燃爆危险性分析与安全控制措施[J].安全、健康和环境,2025,25(8):37-43,7.基金项目
中国石化科技部项目(KI324003),气相氧化混合过程燃爆压力削减技术研究. （KI324003）
