- 1. 为了研究瓦斯的爆炸危险性，选取对其影响较大的初始温度和初始压力进行实验研究。运用特殊环境20 L爆炸特性测试系统，对不同初始温度(25~200 ℃)和初始压力(0.1~1.0 MPa)条件下瓦斯的爆炸极限、最大爆炸压力和点火延迟时间进行实验研究。结果表明：高温高压条件使瓦斯的爆炸上限升高、下限降低，爆炸极限范围扩大；随着初始温度升高，瓦斯爆炸的最大爆炸压力逐渐减小；初始温度越高，点火延迟时间越短。通过对实验结果的分析，运用安全原理知识和危险度定义，给出初步评估瓦斯爆炸危险性的方法。
摘要: 为了研究瓦斯的爆炸危险性，选取对其影响较大的初始温度和初始压力进行实验研究。运用特殊环境20 L爆炸特性测试系统，对不同初始温度(25~200 ℃)和初始压力(0.1~1.0 MPa)条件下瓦斯的爆炸极限、最大爆炸压力和点火延迟时间进行实验研究。结果表明：高温高压条件使瓦斯的爆炸上限升高、下限降低，爆炸极限范围扩大；随着初始温度升高，瓦斯爆炸的最大爆炸压力逐渐减小；初始温度越高，点火延迟时间越短。通过对实验结果的分析，运用安全原理知识和危险度定义，给出初步评估瓦斯爆炸危险性的方法。
Experimental study on gas explosion hazard under different temperatures and pressures
- 1. School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210092, Jiangsu, China;
- Available Online:
Abstract: In order to study the gas explosion hazards under different initial temperatures and high pressures, an experimental study was conducted on methane/air explosion under high temperatures and pressures with a special environmental testing system for studying explosion characteristics, with which the explosion limits were obtained under high temperatures (25-200℃) and high pressures (0.1-1.0 MPa) and so were the maximum explosion pressure and ignition delay time were also under high initial temperatures (25-200 ℃). The experimental results show that with the initial temperature and pressure rising up, the upper gas explosive limit increases, its lower limit decreases, resulting in a widened range of explosive limits. Compared with the narrower range of explosive limits under ordinary temperatures and pressures, the width of the explosive range at 200 ℃ and 1.0 MPa was increased by 101.77% so that the gas explosive probability increases. With the initial temperature rising up, the maximum gas explosive pressure decreases. Compared with the maximum explosive pressure at 25 ℃ and 0.1 MPa, the one at 200 ℃ and 0.1 MPa decreases by 35.89%. When the initial temperature increases, the ignition delay time of gas explosion is shortened. Based on the analysis of the experimental results and the reference of safety principles, a preliminary assessment method of the gas explosion hazard is put forward, which provides a certain basis for the prevention and treatment of gas explosion.