过程控制系统毕业论文--精馏塔控制系统设计.docVIP

摘 要 精馏是一种利用回流使液体混合物得到高纯度分离的蒸馏方法，是工业上应用最广的液体混合物分离操作广泛用于石油、化工、轻工、食品、冶金等部门。精馏的目的是利用混合液中各组分具有不同的挥发度，将各组分分离并达到规定的纯度要求。精馏过程的实质是利用混合物中各组分具有不同的挥发度，即同一温度下各组分的蒸汽分压不同，使液相中轻组分转移到气相,气相中的重组分转移到液相，实现组分的分离。精馏操作的应用越来越广，分流物料的组分越来越多，分离的产品纯度越来越高。 本文主要围绕选丁醇塔为研究对象，在分析其工艺流程和系统构成的基础上，结合实际系统，进行了温度、流量、液位、和压力等影响因素方面的控制系统设计，详细设计了精馏过程的控制方案,包括串级控制、分程控制等。使精馏塔控制系统达到工业生产的要求。 关键词：精馏，控制系统，串级控制分程控制  Abstract 分享到 翻译结果重试 抱歉，系统响应超时，请稍后再试 支持中英、中日在线互译 支持网页翻译，在输入框输入网页地址即可 提供一键清空、复制功能、支持双语对照查看，使您体验更加流畅 Distillation is a use of liquid mixture backflow get high purity of distillation separation method, is the most widely used in industry of liquid mixture separation operation widely used in petroleum, chemical industry, light industry, food, metallurgical and other departments. The goal was to use the mixture of distillation of components with different volatile degree, separation and the various components of the purity of the specified requirements. The essence of the distillation process is to use the mixture of components with different volatility for, namely the same temperature of various components of the steam partial pressure of different, make the light component in liquid phase transfer to the gas phase, restructuring of the gas phase transfer to liquid, realize the separation of components. Distillation operation used more and more widely, tap the components of the material is more and more, the separation of more and more high purity This paper, focusing on choose butanol tower as the research object, the analysis of the process flow and system components on the basis of the practical system, the temperature, flow, liquid level, and stress factors as the control system design, detailed design the distillation process control plan, including cascade control, process control points. Make the column to industrial control system of production requirements. Keywords: Distillation. Control system. Cascade control. Process control points  目 录 摘 要 I Abstract II 第1章 绪 论 1 1.1 课题研究的目的和意义 1