富氧焙烧炉炉温先进控制的研究与应用  

Research and application of advanced process control for oxygen-enriched roasting furnace temperature

作　　者：杨义磊 魏发宏 张飞 虞垚 黄珊 沈翠莲 YANG Yilei;WEI Fahong;ZHANG Fei;YU Yao;HUANG Shan;SHEN Cuilian(Emerson Xi′an Engineering Center Co.,Ltd.,Xi′an 710100,Shaanxi,China;Huize Smelting Branch,Yunnan Chihong Zin&Ge Co.,Ltd.,Qujing 654211,Yunnan,China;Emerson Process Management Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]艾默生科技资源(西安)有限公司,陕西西安710100 [2]云南驰宏锌锗股份有限公司会泽冶炼分公司,云南曲靖654211 [3]艾默生过程控制有限公司,上海200120

出　　处：《中国冶金》2024年第7期82-91,共10页China Metallurgy

摘　　要：锌精矿富氧焙烧炉高效、安全、稳定运行的关键是控制好炉温。炉温控制受多个变量影响,存在回路难以投自动、炉温波动幅度大、劳动强度大的问题。基于工艺流程分析识别操作变量、干扰变量、被控变量和约束变量,以装置历史运行数据为数据集,通过子空间辨识算法构建模型预测控制器并验证其准确性,从而建立焙烧炉炉温先进控制系统。以炉床面积109 m^(2)、炉床处理能力7.8 t/(m^(2)·d)的焙烧炉为研究对象,对比系统投运前后数据,发现系统投运后焙烧炉炉温波动明显下降,炉温标准差下降了36.64%;炉温实现了卡边控制,其控制范围从±25℃下降到±10℃。该系统可用性强,投运率为98.69%;操作员操作频次降低98.35%,劳动强度得以降低;抗干扰能力有所加强、装置处理量提升0.22%、经济效益增加190.98万元/a。研究表明,锌冶炼富氧焙烧炉炉温先进控制系统提升了装置自动化水平、提高了焙烧炉运行效能、降低了人员劳动强度,达到挖潜增效的目的,并为先进控制技术在焙烧炉炉温控制的工业应用和推广提供理论支撑,具有一定的实践意义。The key to the efficient,safe and stable running of oxygen-enriched roasting furnace in the zinc smelting is to control the roasting furnace temperature effectively.The temperature control of the roasting furnace is affected by multiple variables.There are problems such as difficulty to switch to automatic mode for control loop,large fluctuation in roasting furnace temperature,and high labor intensity in operation.Manipulated variables,disturbance variables,controlled variables and limiting variables were identified based on process flow analysis.Using the historical operating data of the device as data set,a model predictive controller was constructed through the subspace identification algorithm and the accuracy of model was verified,therefore,an advanced temperature control system for the roasting furnace was established.Taking oxygen-enriched roasting furnace with the bed area of 109m^(2) and bed treatment capacity of 7.8t/(m^(2)·d)as the research object,comparing the data before and after the system was put into operation,it was found that the fluctuation of roasting furnace temperature decreased significantly,and the standard deviation of furnace temperature decreased by 36.64%.The furnace temperature had achieved bounder control,reducing range from±25℃to±10℃.The system utilization rate was 98.69%,showing strong system availability,and the frequency of operator operations had been reduced by 98.35%,greatly reducing the labor intensity.The system had stronger anti-interference ability,and the unit capacity had increased by 0.22%.At the same time,economic analysis showed that the system could increase by 1.9098×106 yuan/a.The research shows that the advanced process control system for the furnace temperature of oxygen-enriched roasting furnace in the zinc smelting improves the automation level and operation efficiency of roasting furnace,reduces the labor intensity,achieves the purpose of tapping potential and increasing efficiency.It also provides theoretical support and practical significance for th

关 键 词：富氧焙烧 焙烧炉炉温 先进控制 模型预测 挖潜增效 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TF813[自动化与计算机技术—控制科学与工程]