Advanced Practical Process Control

Abstract

The use of general descriptive names , registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.Typesetting: Camera ready by authors Cover-design: medio, Berlin Printed on acid-free paper 62/3020 hu -5 43 2 1 0 - PrefaceIn the process industries there is an ongoing need for improvement of the operation of the process . One of the disciplines that will help the process engineer to achieve this is process control. There are many industrial automation systems today that will offer powerful tools to meet the process control needs of industries with continuous, batch and discrete operations. Advanced control solutions sustain and improve the plant's competitiveness by ensuring:-safe operations -compliance with environmental regulations -effective use of raw materials and energy -efficient production -manufacturing of high quality products -flexible accommodation of changing process requirements This book was written from the perspective of introducing advanced control concepts, which can help the engineer to reach the aforementioned goals . Many advanced control techniques have been implemented in industry in recent years, since hardware and software platforms are becoming increasingly powerful. Manufacturers of process control equipment call this hardware and software environment generally 'distributed control system' . The distributed control system equipment offers the engineer an excellent platform for writing and implementing advanced control solutions. However, most large chemical and petrochemical manufacturers hire control specialists to implement these control solutions, while small manufacturers often lack the funds to hire these professionals. Therefore it is our experience that in the latter case, process engineers often write the control programs required to improve process operation.However, the step from textbook or theory to control implementation is a major one. Simulation can help the engineer to increase his or her understanding of the problem and enables him or her to first check whether the proposed solution indeed solves the problem.This book is set up to help the engineer and student to start from the available theory and build control solutions. The focus of the book is not on process dynamics but on process control and process optimization. It is assumed that the reader is familiar with process dynamics, even though some simple models are developed II Preface and explained. The book uses a very practical approach to problems and gives many examples .If the user is disappointed because a thorough treatment of the underlying theory is missing, we would like to refer him or her to the many excellent books on process dynamics, control and optimisation. Many of these books miss, however, the practical solution and implementation of the solution in a simulation environment. Rather, many books dwell on theoretical considerations and...

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