罩式炉加热罩空燃比优化
Heating Hood Air-Fuel Ratio Optimization of Bell Annealing Furnace
刘胜杰1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
bell annealing furnace/heating hood/air-fuel ration/oxygen content引用本文复制引用
出版年
2024
NETL
NSTL
万方数据