关键词: 支链爆炸, 浓度爆炸极限, 爆炸形态, 爆炸波形, 防爆安全指标

Abstract: The characteristics and application of the branched chain explosion of hydrocracking hydrogenation recycle gas and the relevant combustible gases were systematically studied. The explosive limits of concentration, explosive morphology, explosive waveforms and their influence factors were investigated. From the different kinds of explosive morphology and its pressure waveforms, a new idea on compartmentalization of explosive morphology for the hydrocracking hydrogenation recycle gas was introduced.Within the explosive limits, four kinds of explosive morphology (cold flame, deflagration，detonation，and transition from deflagration to detonation) could be compartmentalized and seven explosive zones (lower cold flame zone, lower deflagration zone, lower deflagration transformed into detonation zone, detonation zone，upper deflagration transformed into detonation, upper deflagration zone and upper cold flame zone) could be classified. The different mechanisms for developing the pressure waves of the explosive morphology were explored. Such knowledge is valuable for further studying the relevant system of branched-chain explosion and developing the theory of branched-chain explosion.The minimum ignition energy, the maximum experimental safe gaps, the degree of explosion danger and other
explosion characteristics were experimentally determined. This paper also introduces the concept of ‘key components’ and pointes out that it is the key components of H2 and oxidant O2 that ignite explosion for the system consideres here.The references and methods for developing the explosion-proof safety guidelines were proposed. The results will be of significance in preventing accidents caused by mixture gas branched-chain explosion, giving directions to designing explosion-proof electric equipment and fire arresters, supervising the application of the concepts of branched-chain burning and branched-chain explosion to practice.

Key words: 支链爆炸, 浓度爆炸极限, 爆炸形态, 爆炸波形, 防爆安全指标