罩式炉加热罩空燃比优化  

Heating Hood Air-Fuel Ratio Optimization of Bell Annealing Furnace

作　　者：刘胜杰 Liu Shengjie(Tinplate Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan Hebei 063200,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司镀锡板作业部,河北唐山063200

出　　处：《山西冶金》2024年第6期207-209,共3页Shanxi Metallurgy

摘　　要：罩式炉加热罩燃烧使用的焦炉煤气为混合气体,其热值不稳定,易受多种因素的影响,难以精准控制空燃比。空燃比设置偏高,排出的废气增多,热量损失大,降低了热效率。空燃比设置偏低,加热能力不足,退火时间长,导致产量降低。基于此,提出采用排烟系统中废气氧含量反馈法对空燃比进行优化。经过测算,最终确定出空燃比的最优值和调节范围,实现了在退火过程中对空燃比的闭环控制,解决了煤气热值不稳定带来的问题,达到了预期效果。Coke oven gas used for heating hood combustion of bell annealing furnace is a mixed gas,which has an unstable calorific value.It is easily affected by various factors,which greatly interferes with the setting of the air-fuel ratio of the heating hood.If the air-fuel ratio is set too high,more exhaust gas being discharged,resulting in more heat loss and reduced thermal efficiency.If the air-fuel ratio is set too low,the heating capacity being insufficient,the annealing time being long,which reduces production.Both of them can cause pollution to the atmosphere.This article introduces a control strategy for the feedback method of exhaust gas oxygen content.After measurement and calculation,the optimal value and adjustment range of the air-fuel ratio were ultimately deter mined,achieving closed-loop control of the air-fuel ratio during the annealing process,solving the problem of unstable gas calorific value.The heating hood can burn completely,saving energy and reducing emissions,achieving the expected effect.

关 键 词：罩式退火炉 加热罩 空燃比 氧含量 

分 类 号：TG307[金属学及工艺—金属压力加工]