tailieunhanh - AUTOMATED CONTINUOUS PROCESS CONTROL

Automatic process control is concerned with maintaining process variables, temperatures, pressures, flows, compositions, and the like, at a desired operating value. As we shall see in the ensuing pages, processes are dynamic in nature. Changes are always occurring, and if actions are not taken, the important process variables— those related to safety, product quality, and production rates—will not achieve design conditions. | 7 3 2003 8 30 PM Page i AUTOMATED CONTINUOUS PROCESS CONTROL 7 3 2003 8 30 PM Page iii AUTOMATED CONTINUOUS PROCESS CONTROL CARLOS A. SMITH Chemical Engineering Department University of South Florida A Wiley-Interscience Publication JOHN WILEY SONS INC. 7 3 2003 8 30 PM Page iv This book is printed on acid-free paper. Copyright 2002 by John Wiley Sons Inc. New York. All rights reserved. Published simultaneously in Canada. No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording scanning or otherwise except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act without either the prior written permission of the Publisher or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center 222 Rosewood Drive Danvers MA 01923 978 750-8400 fax 978 750-4744. Requests to the Publisher for permission should be addressed to the Permissions Department John Wiley Sons Inc. 605 Third Avenue New York NY 10158-0012 212 850-6011 fax 212 850-6008 E-Mail PERMREQ@. For ordering and customer service information please call 1-800-CALL-WILEY. Library of Congress Cataloging-in-Publication Data Is Available ISBN 0-471-21578-3 Printed in the United States of America. 10 .