加热炉热效率在线计算及控制方案探讨
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摘要
针对传统控制方案的不足,通过深入分析炼油厂加热炉的过程特性和热效率计算公式,采用了炉膛负压烟道挡板间隙式PID控制和前馈-反馈氧含量PID控制方案。该方案能有效地克服加热炉在负荷或燃料性质发生变化时,风道挡板或调频鼓风机的PID控制滞后、调节不及时的问题;克服了烟道挡板频繁动作导致的不利影响。可有效控制排烟温度、过剩空气系数,对提高热效率具有显著作用。
Aiming at the disadvantage of traditioanl control scheme, through in-depth analysis of the refinery furnace process characteristics and thermal efficiency calculation formula, the gap PID control of baffle in chimney flue for negative pressure of heating furnace hearth and oxygen content of feedforward-feedback PID control scheme are proposed. The scheme can effectively overcome the problem of PID control lag and untimely regulation of duct baffle or frequency modulation blower when the load or fuel property of heating furnace changes. The adverse effect caused by frequent movement of baffle in chimney flue is overcome. The exhaust gas temperature, excess air coefficient can be effectly controlled and thermal efficiency is improved.
Aiming at the disadvantage of traditioanl control scheme, through in-depth analysis of the refinery furnace process characteristics and thermal efficiency calculation formula, the gap PID control of baffle in chimney flue for negative pressure of heating furnace hearth and oxygen content of feedforward-feedback PID control scheme are proposed. The scheme can effectively overcome the problem of PID control lag and untimely regulation of duct baffle or frequency modulation blower when the load or fuel property of heating furnace changes. The adverse effect caused by frequent movement of baffle in chimney flue is overcome. The exhaust gas temperature, excess air coefficient can be effectly controlled and thermal efficiency is improved.
引文
[1] 孙优贤,邵惠鹤.工业过程控制技术应用篇[M].北京:化学工业出版社,2006:26-32,39-40.
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[3] 彭继爽.焦化加热炉热效率控制方案探讨[J],石油化工设计,2017,34(02):33-36.
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[5] 蒋慰孙,俞金寿.过程控制工程[M].2版.北京:中国石化出版社,1999.
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[7] 乐嘉谦.仪表工手册[M].2版.北京:化学工业出版社,2007.
[8] 葛延峰.提高加热炉热效率控制系统的设计与应用[J].石油石化节能,2012(09):54-56.
[9] 陈欣,加热炉均衡控制的几种方案[J].石油化工自动化,2011,47(05):27-31.
[10] 梁占伟,陈鸿伟,杨新,等.煤/气混燃锅炉运行优化与智能算法预测模型[J].自动化仪表,2018(01):20-24.
[11] 李奇达,谭树彬.燃烧空燃比控制系统性能评估[J].自动化仪表,2018(05):1-4.
[2] 白文康,黄焕民.SH/T 3045—2003石油化工管式炉热效率设计计算[S].北京:中国石化出版社,2004.
[3] 彭继爽.焦化加热炉热效率控制方案探讨[J],石油化工设计,2017,34(02):33-36.
[4] 陆德民,张振基,黄步余.石油化工自动控制设计手册[M].3版.北京:化学工业出版社,2000:429-434.
[5] 蒋慰孙,俞金寿.过程控制工程[M].2版.北京:中国石化出版社,1999.
[6] 蔡武昌,孙淮清.流量测量方法和仪表的选用[M].北京:化学工业出版社,2001.
[7] 乐嘉谦.仪表工手册[M].2版.北京:化学工业出版社,2007.
[8] 葛延峰.提高加热炉热效率控制系统的设计与应用[J].石油石化节能,2012(09):54-56.
[9] 陈欣,加热炉均衡控制的几种方案[J].石油化工自动化,2011,47(05):27-31.
[10] 梁占伟,陈鸿伟,杨新,等.煤/气混燃锅炉运行优化与智能算法预测模型[J].自动化仪表,2018(01):20-24.
[11] 李奇达,谭树彬.燃烧空燃比控制系统性能评估[J].自动化仪表,2018(05):1-4.