关键词: 甲醇氨氧化, 浓度爆炸极限, 爆炸形态, 阻尼效应

Abstract:

Systematic studies were carried out to investigate the explosion characteristics and morphology of the multicomponent explosive gas mixture CH₃O-NH₃-air.It was found that the explosive limit of concentration of the gas mixture (CH₃OH∶NH₃=1∶1.1) was 12.85%—45.25%.There were only two explosion morphologies for the explosive gas mixture.One is cool flame, and the other is deflagration.Furthermore, strong detonation was not observed during the explosion experiments.N₂ and steam did have some inert effect on the explosion of the explosive gas mixture, while NH₃ had a clear damping effect on the explosion for the gas mixture with CH₃OH and air.With the decrease of ratio of CH₃OH to NH₃, the degree of explosive danger, explosion maximum pressure and pressure rise rate decreased at the same time.The present work provides a good guidance for the technological upgrade of methanol ammoxidation in industrial production due to its good effectiveness of explosion suppression and powerful explosion-proof measure.It also has a potential application of methanol ammoxidation because of its substantial increase in productivity, low investment, rapid implementation, and high economic benefits.

Key words: 甲醇氨氧化, 浓度爆炸极限, 爆炸形态, 阻尼效应