气粉两相体系爆炸动力学特性及机理研究进展  

Research progress on explosion dynamic characteristics and mechanism of hybrid mixtures

作　　者：苏彬 董浩伟 罗振敏 邓军 王涛 程方明 SU Bin;DONG Haowei;LUO Zhenmin;DENG Jun;WANG Tao;CHENG Fangming(School of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,Shaanxi,China;Shannxi Engineering Research Center for Industrial Process Safety and Emergency Rescue,Xi’an 710054,Shaanxi,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]陕西省工业过程安全与应急救援工程技术研究中心,陕西西安710054

出　　处：《化工学报》2024年第6期2109-2122,共14页CIESC Journal

基　　金：国家自然科学基金项目(52304252)。

摘　　要：可燃性粉尘与易燃易爆气体广泛存在于工贸行业的各个环节之中,即使当粉尘和气体浓度都低于爆炸下限时,混合体系仍有发生爆炸的可能性,所以与单一粉尘或气体相比,气粉两相体系具有更高的爆炸危险性。主要从气粉两相体系的爆炸条件、爆炸效应以及爆炸机理三方面分析总结了两相体系爆炸敏感度参数、爆炸强度参数、火焰传播特性变化规律及其爆炸反应机理。研究结果表明,气粉两相体系的爆炸特性主要是受粉体粒径、粉体浓度、粉体物理化学特性、可燃气体浓度等多因素的共同影响,且不同体系之间具有较大差异性。此外,依据粉体热稳定性将两相体系分为两大类别,并分别探讨了其爆炸机理。基于此,对气粉两相体系爆炸防控亟待解决的方向和今后研究重点进行展望,为工矿气粉涉爆企业的安全生产提供理论指导。Combustible dust and flammable gases are widely present in all aspects of industry and trade.Even when the concentrations of dust and gas are below the lower explosion limit,the mixed system still has the possibility of explosion.Compared with a single dust or gas,the hybrid mixtures have a higher explosion risk.In this paper,the explosion sensitivity parameters,explosion intensity parameters,flame propagation characteristics and its explosion mechanism of hybrid mixtures are investigated from three aspects(explosion conditions,explosion effect and explosion mechanism).The results show that the explosion characteristics of hybrid mixtures are mainly affected by the powder particle size,powder concentration,powder physicochemical properties and combustible gas concentration,and there are great differences between different hybrid mixtures.In addition,hybrid mixtures are divided into two major categories based on the powder thermal stability,and the explosion mechanism of different hybrid mixtures is examined.Based on this,the future research work focusing on the explosion prevention and control of hybrid mixture is put forward,which provides theoretical guidance for the safe production of gas-powder related explosive enterprises in industrial and mining sectors.

关 键 词：安全 爆炸 混合物 爆炸敏感度 爆炸特性 爆炸机理 两相体系 

分 类 号：TQ028.8[化学工程]