The move toward increased water conservation in recirculating cooling water systems has prompted development of a new organic scale control agent capable of inhibiting calcium carbonate (CaCO3) at high cycles of concentration. Additionally, because the use of sulfuric acid for pH control is undesirable in many systems, the new organic agent is designed for acid free operation and the associated highly scaling waters that result from elevated alkalinity. Successful use of this technology is demonstrated in a recirculating cooling water system previously treated at low cycles of concentration with conventional phosphonate technology. This application demonstrated that in an acid free environment, the new agent was capable of controlling scale and corrosion at increased cycles of concentration. Microbiological control and overall system cleanliness were not compromised with this program. The effect on water consumption and overall water cost savings are clearly quantified.

Subject
Acids, Costs, Water, Alkalinity, Corrosion rate, Phosphonates, Scale inhibitors, Calcium, Acidity, Condensers, Cooling systems, Cycles of concentration, Langelier saturation index
Keywords:
CaCO3 inhibition, high cycle operation, acid elimination, cooling water treatment, corrosion control, water reuse
© 1994 Association for Materials Protection and Performance (AMPP). All rights reserved. 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, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1994
Association for Materials Protection and Performance (AMPP)
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