【作者】 杨镇；

【导师】 王慧锋； 徐凌；

【作者基本信息】 华东理工大学 ， 控制工程， 2012， 硕士

【摘要】 乙烯是石油化学工业最重要的基础原料,一个国家乙烯工业的发展水平,已成为衡量这个国家石油化学工业水平的重要标志。如今,新一代集散控制系统已经覆盖了乙烯生产的整个过程,从顶部的经营管理层,到中间的操作管理层,再到底部的生产控制层和现场仪表层,为企业提供了一个集成化的信息平台。本文依托企业合作项目,以国内某乙烯生产线为研究和设计对象,分析了乙烯生产工艺和乙烯生产控制系统的特点,结合实际工艺流程和业主要求,研究和设计了一个以西门子SIMATIC PCS7为基础的乙烯精馏段过程控制系统。西门子SIMATIC PCS7作为全新一代DCS过程控制系统,采用了全集成自动化理念(TIA)。PCS7是一个可在众多工业领域使用的标准化控制系统,是全集成自动化的核心部件,为生产、过程和综合工业中所有领域实现统一的、符合客户要求的自动化平台。PCS7系统由多用户HMI系统、客户机/服务器系统、网络通讯系统、现场控制站等部件组成,通过统一的数据管理、通讯和组态功能,应用于过程工业、制造业以及混合型工业。本文首先分析了乙烯生产工艺的流程,结合控制系统的设计要求及控制方案,以西门子PCS7系统为软硬件控制平台,针对乙烯控制系统进行了系统硬件配置,并在保证整个控制系统的实时性和准确性的同时,采用了冗余配置的网络设计,引入了Profibus-DP现场总线技术。其次,利用CFC完成了控制系统的软件设计,分析了各种程序的逻辑组态。最后对WinCC监控系统进行了分析和研究,完成监控系统的画面组态。更多还原

【Abstract】 Ethylene is the most important basic material of petrochemical industry. A national ethylene industry level of development, has become the important sign of the level of national petrochemical industry. Now, the new generation of distributed control system has been covering the entire ethylene production process, from the top of the operating management, to the middle of the operation management, to production control at the bottom of the layer and the scene of the instrument, this system has provided enterprises with an integrated information platform. This article relies on business cooperation projects, takes ethylene production line as the research and design objects, analyzes ethylene production technology and the characteristics of control system, combining the actual process and the design requirements of the owner, studies and designs ethylene rectification section process control system based on Siemens SIMATIC PCS7 system.As the new generation of distributed control system, SIMATIC PCS7 uses the TIA (Totally Integrated Automation) concept. PCS7 is a standardized control system can be used in many industrial fields. It is the core component of TIA, and accomplishes the uniform automation platform meeting customer’s requirements for all the fields of production,process and integrated industry. PCS7 is composed of multi-user HMI system,client/server system, network communication system, automation system and so on. It is used in process industriy, manufacturing and mixed industry by data management, communication and configuration functions.This article firstly analyzes the ethylene production process, combining design requirements and control method of control system, based on PCS7, does hardware configuration for ethylene control system. And the system not only ensures the real-time and accuracy, but also adopts the redundancy technique in network design and uses the technology of Profibus-DP. Secondly, the control schemes of the control system are researched and configured with CFC. Finally, the operation and monitoring system is designed and configured by using WinCC.更多还原