Application Of Regenerative Burning Technology On Hot Blast Stove System

Hot blast stove is one of the most important equipment in BF iron-making process. Increasing blast temperature is meaningful to reducing the coke rate and to improve the combustion intensity. In this dissertation, finite volume method on basis of energy-balance equation is employed to model a2-D hot blast stove, established at iron-making plant, Benxi Iron&Steel Group, in Liaoning. Meanwhile, discrete equations of different coordinated systems with finite volume method are deduced. Then, the hot blast stove’s operating schedule is taken into practical accounts. At last, the conclusions are drawn, that staggered parallel air supply operating schedule possesses the better performance than one-furnace air supply and parallel air supply operating schedule.For double preheating systems that both fuel and air are preheated, adopted by most of hot blast stove systems, a kind of new preheating equipment, regenerative heat exchanger, is presented. To the best of the author’s knowledge, it is the first time to build up a mathematical model by combining regenerative heating technology with traditional heat method. The effects of different parameters and operating schedule on the accuracy of this model are also analyzed. Moreover, the model is applied in hot blast stove systems as "virtual equipment" and is compared with other preheating schedule. The results illustrate that this novel heat exchanging equipment, regenerative heat exchanger, is superior to any other traditional heat exchanging equipment. This method possesses the ability of remarkably increasing the air temperature draught from hot blast stoves, which is able to be extensively turned in practice.