高风温下热风炉操作对蓄热室温度分布的影响

提高风温过程中,热风炉蓄热室温度分布将产生相应的变化。本文针对首钢迁安钢铁有限责任公司2号高炉热风炉,数值模拟高风温下各种热风炉操作引起的蓄热室温度分布变化。研究结果表明:烟气温度每提高10 K,蓄热室高温区(不小于1 573 K)向下扩展0.25 m;烟气速度每升高1 m/s,高温区将向下扩展0.83 m,烟气出口温度提高25 K;高风温条件下应增加硅砖高度,并通过加强中温区格子砖的热容和热导率,提高中温区的蓄热量和热交换效率。

Influence of operating regulation of hot blast stove on temperature distribution of regenerator in high blast temperature

With increasing blast temperature,distribution of temperature in regenerative chamber of hot blast stove will be changed correspondingly.Numerical simulation of temperature change of hot blast stove of Qiangang No.2 blast furnace,Shougang Group,was done under high temperature and various operations in the paper.As demonstrated by results,the high temperature zone(≥1573K)of regenerative chamber is extended downward by 0.25m with temperature increased by 10K;the high temperature zone of regenerative chamber is extended downward by 0.83m and output exhaust gas temperature is increased by 25K with exhaust gas speed elevated by 1m/s;the height of silica bricks should be lifted,heat capacity and heat conductivity checkered bricks in intermediate temperature zone should be strengthened in order to increase heat quantity and heat exchange efficiency under high temperature condition.