In view of the restrictive environmental protection and shrinking landfill capacities in Western Europe, the controlled incineration of industrial and municipal waste in conceived plants points out a chance to take care of natural resources. Such plants include subsequent units to treat the – probably catalytically oxidized – hot flue gases. Counter current scrubbers using water or caustic soda solution free the cooled flue gases from hazardous compounds.

The simultaneous demand of an acidic atmosphere and a circulating alkaline brine to the whole construction requires a careful material selection, which today is efficiently solved by choosing a combination of a thermoplastic material serving as so-called chemical barrier and a load-bearing structure made from glass-fiber reinforced plastic (FRP). Thanks to its cost-performance ratio polypropylene plays a significant part amongst thermoplastic materials.

Today different polypropylene grades for sheet material in combination with different fabric backings protect the FRP-structure from heavy alkaline and acidic attack downstream of the quenching step of waste incineration plants.

Subject
Chemical compounds, Materials, Laminates, Polypropylene, Scrubbers, Structures, Chemical attack, Flue gas, Fiber reinforced plastic, Polymers, Polyester, Resins, Adhesion
Keywords:
acidic, alkaline, caustic, FRP, GF-UP, HCl, HF, HNO3, incineration, MWI
© 2009 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).
2009
Association for Materials Protection and Performance (AMPP)
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