【作者】 刘学禹；

【导师】 李士雨；

【作者基本信息】 天津大学 ， 化学工程， 2006， 硕士

【摘要】 石化企业的自动化生产程度的高低很大程度上影响着我国国民经济,其中准确、及时的过程检测是实现自动化的基本保障。目前,如何利用现代计算机信号处理和过程模拟技术提高过程检测水平,保证生产的安全高效进行,降低成本以获得更高的经济效益,已经成为一个重要课题。本文分析了现有的过程检测的执行方式,针对石化过程检测中迫切需要实现的现代滤波技术保证的数字滤波技术、实时在线检测和对检测难度很大的检测变量的软测量,提出使用基于CHEMCAD用户接口技术的过程虚拟检测的方法,利用CHEMCAD在化工过程模拟计算上的优势,结合现代滤波技术,建立以COM技术为手段、以现代数字滤波为保障,以过程模拟计算为核心,以石化过程检测为研究对象的虚拟检测模式;通过EXCEL程序将各个模块组件有机结合,对过程检测数据进行显示、分析、统计,实现测、图、表、管一体化。并可与现有石化过程检测系统整合,如:DCS系统,实现过程的实时检测、预估,并为过程的在线优化和先进控制提供了技术条件。为了实现基于CHEMCAD用户接口技术的过程虚拟检测系统,作者进行了有益的尝试。在EXCEL程序中,使用VBA语言和Microsoft COM组件技术,针对实际丙烯精馏单元完成了该系统的实例程序,证明了其可行性,并对各种集成手段和程序功能进行了讨论和实现。更多还原

【Abstract】 Petrochemical enterprise is so important for the economy of our country that its degree of automation, which depends on the exact and opportune process detection, directly affects the national economy total value. Currently, it is in a low level in the world, so how to improve the process detection by modern computer signal processing and process simulation, for the purpose of production safe and efficiency, reducing the costs and getting better economical benefit, has become a critical task that needs to be solved immediately.With the analysis of the current process detection, a new pattern of process virtual detection system based on the CHEMCAD user interface has been developed, given that the digital filtering, online detection and soft-measurement are cried for in petrochemical process. By taking the advantage of CHEMCAD in chemical process simulation and integrating with the modern signal filtering, the virtual detection mode, which depends on the COM interface, modern digital filtering and process simulation, is described. The new pattern should integrate every module and realize the integration of detection, graphs, tables and operation, also with the petrochemical process detection system in existence, such as the DCS. By real time detection and prediction, the new application makes the online optimization and advanced control come true.In order to realize the virtual detection system in petrochemical process based on CHEMCAD user interface, the author has designed the application with VBA language and Microsoft COM interface in EXCEL, which based on the propylene distillation unit. It has proved the correctness and the feasibility of the new pattern and its program code.更多还原