全流程智能控制在国产化乙烯装置上的应用  

Application of Whole Process Intelligent Control System in Domestic Ethylene Plant

作　　者：李全善 王堃[2] 朱连勋[2] 陈平 Li Quanshan;Wang Ktm;Zhu Lianxun;Chen Ping(Beijing Century Robust Technology Co.,Ltd.,Beijing 100020,China;PetroChina Daqing Petrochemical Company,Daqing Heilongjiang 163711,China)

机构地区：[1]北京世纪隆博科技有限责任公司,北京100020 [2]中国石油大庆石化分公司,黑龙江大庆163711

出　　处：《石油石化绿色低碳》2018年第5期6-10,共5页Green Petroleum & Petrochemicals

摘　　要：为推动石油化工节能与绿色发展,基于工业生产大数据研发了智能建模、智能内模PID优化控制、智能变参数非线性区域控制、烽燧控制和多变量智能控制五大关键技术,形成了信息化与工业化深度融合的全流程智能控制技术。全流程智能控制技术解决了常规控制回路抗干扰能力差、无法适应多工况问题;针对生产过程参数变化,通过消除相关过程间的干扰,依靠塔器的缓冲作用,实现生产过程平稳过渡。该技术的应用解决了生产装置中多变量、非线性、强耦合、纯滞后、间歇式和连续式控制并存、多约束和多目标调控等技术难题,达到全流程高精度快速平稳控制,实现了生产装置在正常运行、开停工过程的智能精准控制,提高了收率、降低了能耗。在国产化60万吨/年乙烯装置上应用后,石脑油和乙烷炉双烯收率分别提高0.52和1.99百分点,能耗降低40.12千克标油/吨,实现了乙烯装置低碳高效运行。As part of an effort to promote the energy conservation and green development in petrochemical industry, the whole-process intelligent control technology featuring deep integration of informatization and industrialization has been created based on intelligent modeling（Robust-M）, intelligent internal model PID optimal control（Robust IMC-PID）, intelligent variable parameter nonlinear region control（Robust VNLAC）, beacon fire control（Robust BFC） and multivariable intelligent control（Robust MIC）, as well as big data of industrial production. The technology can solve the problems of poor anti-interference ability and failing to adapt to multiple operating conditions existed in conventional PID control, and realize smooth transition of production processes amid the variable process parameters by eliminating interference among the related processes and utilizing buffer effect among facilities like tower and reactor. It can also solve the technical issues concerning multivariable, nonlinear, strong coupling, pure lag, mixed intermittent and continuous control, multi constraints and multi-objective control, thereby achieving precise, swift and steady control of the whole process and intelligent, precise control in normal operation, startup and shutdown of facilities, with higher product yield and lower energy consumption. After its commercial application in a domestic 600 kt/year ethylene plant, the ethylene yield from naphtha cracking furnace and ethane cracking furnace has increased by 0.52 and 1.99 percentage points respectively, and energy consumption reduced by 40.12 kgEO/t, resulting in low-carbon and high efficient operation of the ethylene plant.

关 键 词：全流程 智能控制 双烯收率 能耗 

分 类 号：TQ221.211[化学工程—有机化工] TP273.5[自动化与计算机技术—检测技术与自动化装置]