摘要
针对攀钢钒炼铁厂3#高炉热风炉外排烟气存在的问题,提出通过降低热风炉燃料中硫化物的含量以降低外排烟气SO_(2)浓度的工艺路线。通过分析热风炉改造前烟气排放情况及煤气成分,研究掺混部分转炉煤气条件下SO_(2)的排放情况,论述其达到超低排放要求的可行性,并分析不同条件下热风炉内的阻力损失。结果表明,系统设计按转炉煤气与高炉煤气3∶7的比例,实际运行按2.2∶7.8混合,当煤气含水量为60 g/m^(3)时,平均外排烟气SO_(2)浓度≤33.41 mg/m^(3),系统阻力损失降低,热风炉系统的燃烧温度、风量以及阻力损失等均可通过现有设备有效调节,仅需改造转炉煤气及高炉煤气管网系统,即可满足热风炉烟气超低排放要求。
Aiming at the problem of exhaust flue gas emissions from the hot blast stoves of No.3 blast furnace at Panzhihua Steel&Vanadium Plant,a process route was proposed to reduce the SO_(2) concentration in the exhaust gas by decreasing the sulfide content in the stove fuel.By analyzing the flue gas emission status and gas composition before the retrofit,this study investigated SO_(2) emis⁃sions under conditions of blending with converter gas and discussed the feasibility of achieving ultralow emission requirements,as well as analyzing the resistance loss in the hot blast stove under differ⁃ent conditions.The results show that with a system design ratio of converter gas to blast furnace gas at 3∶7 and an actual operation ratio at 2.2∶7.8,when the water content in the gas is 60 g/m^(3),the av⁃erage SO_(2) concentration in the exhaust flue gas is≤33.41 mg/m^(3),and the system resistance loss is re⁃duced.Parameters such as combustion temperature,air volume,and resistance loss of the hot blast stove system can be effectively regulated using existing equipment.Only modifications to the con⁃verter gas and blast furnace gas pipeline systems are required to meet the ultra-low emission stan⁃dards for hot blast stove flue gas.
作者
候晓梅
苟志远
施敏
陈向华
蒋昭祎
周中艳
HOU Xiaomei;GOU Zhiyuan;SHI Min;CHEN Xianghua;JIANG Zhaoyi;ZHOU Zhongyan(Panzhihua Pangang Group Design&Research Institute Co.,Ltd.;Pangang Group Panzhihua Steel&Vanadium Co.,Ltd.,Panzhihua,Sichuan 617023,China)
出处
《冶金动力》
2025年第5期73-77,共5页
Metallurgical Power
关键词
热风炉
烟气
超低排放
SO_(2)
阻力损失
hot blast stove
flue gas
ultra-low emissions
SO_(2)
resistance loss
