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本文对吸热式发生器的放—吸热过程进行了分析,对吸热式发生器在运行过程中容易出现炭黑的原因进行了初步探讨并得出以下结论:发生器底部的炭黑主要是在500～800℃之间原料气的裂解及燃烧—放热反应过程中出现的。由于烯烃存在c=c双键。所以其含量愈高炭黑的出现就愈严重。当放热反应温度超过1000℃时,由于甲烷的直接裂解也会出现炭黑;如果吸热反应温度过低,也会出现炭黑。消除炭黑的途径是充分抑制裂解、放热过程;减少反应系统的能量损耗;在温度、时间方面为吸热反应创造有利的条件。基于上述认识对发生器进行了一些改造,并作了分析。
In this paper, the endothermic-endothermic process of the endothermic generator was analyzed. The reasons that the endothermic generator easily appeared during the operation were discussed and the following conclusions were drawn: The carbon black at the bottom of the generator is mainly It is during the pyrolysis and combustion-exothermic reaction of the feed gas between 500 and 800 ℃. Due to the presence of olefin c = c double bond. So the higher its content, the more serious the appearance of carbon black. When the exothermic reaction temperature exceeds 1000 ° C, carbon black may also occur due to the direct cracking of methane, and carbon black may occur if the endothermic reaction temperature is too low. The way to eliminate carbon black is to fully suppress the pyrolysis and exothermic process, reduce the energy loss of the reaction system, and create favorable conditions for endothermic reaction in terms of temperature and time. Based on the above understanding of the generator some modifications, and made an analysis.