先进控制技术在氨法烟气脱硫装置上的应用研究  

Study of Advanced Process Control Technology and its Application for Ammonia-Based Flue Gas Desulfurization Process

作　　者：何仁初[1] 侯明辉[2] 印大伟[2] 吴冰[2] 魏永涛[2] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]中国石油大庆石化分公司,黑龙江大庆163714

出　　处：《自动化技术与应用》2014年第4期10-15,19,共7页Techniques of Automation and Applications

摘　　要：大型氨法烟气脱硫(FGD)作为一项新的环保技术,其装置几乎涉及了所有的化工操作单元,对工艺及控制也提出了很高的要求。本文采用多变量预测控制及基于机理模型的软仪表技术,使装置能快速适应原烟气各项参数的复杂变化,并运行在低能耗、最佳液气比、工艺水消耗最小、亚盐氧化更充分的工作状态下,很好的解决了氨法脱硫装置的变量关联、大滞后及耦合问题,使得装置操作更加安全平稳,有效的降低了氨耗并且改善了副产品质量,在满足环保要求的同时使氨法脱硫能经济有效地运行。As a new environmental-protection technology,large-scale ammonia-based Flue Gas Desulfurization （FGD） requires high control and process technology.The process of FGD almost includes all the operation units in chemical industry.In order to make the equipment adapt to some complex changes of original flue gas and operate on better work conditions like low energy consumption,optimum liquid/gas ratio,minimum water consumption,completely nitrites oxidization,the multivariable predictive control and soft sensor based on mechanism model are studied in this paper.The results show that these problems of variables correlation,large delay and variables coupling of FGD are resolved.In addition,ammonia consumption is lower,by-products quality is improved,Besides,the process operation is more smooth and safe,so the equipment can run effectively and economically after carrying on advanced process control.

关 键 词：氨法脱硫 多变量预测控制 环保 机理模型 软仪表 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]