从余热回收与利用角度,在热工测试的基础上,系统分析了烧结和冷却系统漏风的成因,定量研究了漏风对余热回收与利用的影响,并从减小漏风部位内外压差的角度提出了控制漏风的手段。研究表明,冷却系统漏风使得中国大中型烧结机工序能耗增加3%～4%,烧结系统漏风使得工序能耗增加8%～10%;正确设置冷却段鼓风机全压,使得烧结矿层上部和集气罩下部处于微正压,这是降低冷却系统漏风的有效途径之一;降低烧结机引风机的流量与全压是降低烧结系统漏风的另一条有效途径。
From the viewpoint of recovery and utilization of waste heat, the formation of leakage was analyzed systematically firstly; then the influence of leakage on recovery and utilization of waste heat was studied quantitatively; finally, the leakage control measures were brought forth from the aspect of decreasing the pressure difference be- tween inside and outside of leakage location. The results show that leakage of cooling system increases the working procedure of sintering process by 3%-4 %, and the leakage of sintering system increases the working procedure by 8%-10%. It is one of the effective way to set up the total pressure of air blower in cooling system properly, make the top of sinter ore and the bottom Of gas-collecting hood in the condition of micro-positive pressure for reducing the leakage of cooling system. Besides, it is an effective way to reduce the flow-rate of draught fan and total pressure for reducing the leakage of sintering system.
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