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高炉本体工程中热风炉投资约占三分之一,设备十分庞大.随着风温日益提高,热风炉将更加增大.目前国外风温己达1250℃以上.我国近年来也在迅速提高风温,因此,不少工厂甚感原有热风炉在结构上和蓄热能力上均不能适应高风温的需要,今后将利用大修的机会逐步进行改造.热风炉改造是否一定要扩大才能提高蓄热能力呢?从热工状态及工作特征来分析,如能采用高效格子砖或提高废气温度并予热助燃空气,则现有尺寸的热风炉潜力将可得到充分挖掘利用.在发挥各有利因素的基础上,完全可能作到在周期传热量相同的情况下,将蓄热室高度大大降低;或者在不增大现有尺寸的条件下,大大提高蓄热能力,从而提高风温水平和热量利用效率.本文就设计高效热风炉的有关问题发表一些粗浅的看法以供商讨.
Blast furnace engineering investment in hot blast stove accounts for about one-third, the equipment is very large.With the increasing temperature, hot air stove will be more increased.At present, the temperature outside the wind has reached 1250 ℃ above .In recent years, China is also rapidly raising the temperature Therefore, many factories feel that the original hot blast stove can not meet the need of high temperature in structure and heat storage capacity, and will gradually make use of the opportunity of overhaul in the future. Whether the reform of hot blast stove must be expanded can increase the heat storage Capacity? From the thermal status and characteristics of the work to be analyzed, such as the use of high-efficiency grid brick or raise the exhaust gas temperature and heat combustion air, the existing size of the hot stove potential will be fully tapped in the use of various favorable factors , It is entirely possible to greatly reduce the regenerator height with the same amount of heat transfer in the cycle or greatly increase the heat storage capacity without increasing the existing size so as to improve the air temperature level and the heat utilization efficiency This paper presents some superficial comments on the issues related to the design of efficient hot stoves for discussion.