One of the prime concerns in the incineration of municipal solid waste has been to select materials which enable efficient, long term operation of the combustor and superheater to be maintained with minimum servicing. This paper describes an evaluation of tubing retrieved from a water cooled rotary combustor and associated superheater from an operating incinerator. The data indicate that both the carbon steel waterwall combustor tubing and the superheater tubing experienced minimal metal wastage in this aggressive erosion/corrosion environment after several years of operation. Results from test programs designed to identify alternate materials and coatings for possible future use as tubing in plants operating at higher steam conditions are described. Indications are that nickel alloys containing greater than 20 % chromium together with molybdenum have the best resistance to the chloride containing oxidizing environment existing in the combustor. Alternate superheater materials under study include alloys based on the 9 % chromium - 1/ molybdenum composition, stainless steels and nickel alloys.

Subject
Coatings, Materials, Metal surfaces, Nickel based alloys, Tubes, Nozzles, Incinerators, Tubing, Metals, Carbon steel, Deposit corrosion, Steam, Chlorides
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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