宝钢3号高炉炉顶均压煤气回收系统设计

Design of top equalizing gas recovery system of No3 BF at Baoshan Iron & Steel Co.

宝钢3号高炉采用了炉顶均压煤气回收系统,本文阐述了其设计思路、工艺流程及特点。回收工艺为一次回收、二次放散的方式。设置均压煤气回收后,将适当延长炉顶装料时间,使设备赶料能力稍有下降。在烧结矿分级入炉情况下,装料周期达到了573s,装料设备作业率达83％。由于采取了两次除尘措施,回收煤气含尘量可以降到～200mg/m^3n以下,并入净煤气管网后,净煤气含尘量将从5mg/m^3n增加到～6.4mg/m^3n,仍处于用户所能接受的范围内。

This paper describes the design concept,technological flow and characteristics of top equalizing gas recovery system of No3 BF at Baoshan Iron & Steel Co..The recovery technology consist of one times recovery and two times relief.Installating the top equalizing gas recovery system will lead to prolong suitably the filling time and so cause a slight decrease of the capacity to lift stockline.Under the condition of seperate charging of sinter by fraction size,the filling cycle is 573s and the operation efficiency of charge equipment is 83%.Owing to the adoption of two stage dust cleaning,dust content in recoveried gas is decreased to less than 200mg/m3n,and when recoveried gas comes in the clean gas pipes net,dust content in clean gas was raised to 6.4mg/m3n from 5mg/m3n,but this content is still within the limits permitted by user.