INTERNATIONAL ISO STANDARD 9931 First edition 1991-12-15 Coal --- Sampling of pulverized coal conveyed by gases in direct fired coal systems Charbon -- Echantillonnage de charbon pulverise transporte par des gaz dans des systemes a combustion directe de charbon This material is reproduced from Iso documents under International Organization for Standardization (Iso) Copyright License number IHS/lcc/1996. Not for resale, No part of these Iso documents may be reproduced in any form, electronic retrieval system or otherwise, except as aliowed in the copyright law of the country of use, or with the prior written consent of IS0 (Case postale 56, 1211 Geneva 20, switzerland, Fax +41 22 734 10 79), IHS or the ISO Licensor's members. Reference number ISO 9931:1991(E) Not for Resale d without license from IHS ISO 9931:1991(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- work. Iso collaborates closely with the internationai Electrotechnical Commission (lEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approva! by at least 75 % of the member bodies casting a vote. International Standard IsO 9931 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels. Annexes A, B and C of this International Standard are for information only IsO C 1991 All rights reserved. No part of this publication may be reproduced or utillized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the pubiisher. International Organizationfor Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzeriand without license from IHS Not for Resale ISO 9931:1991(E) Introduction This International Standard was developed for use in determining the distribution of pulverized coal between separate burners in a coai-fired power station Sampling in accordance with this International Standard can give infor- d coal firing mation about performance characteristics of a pulverized system, for example 一 with a view to equa! fuel distribution to the burners; when monitoring and adjusting the performance of dividers and baffles in fue! distribution systems; when monitoring pulverizer performance for specified particle size. NOTE 1 The sampler and the sampling method described in this International Standard were developed for the sampling of pulverized coals. However, this does not preclude this International Standard from being suitable for sampling pipes. At present, however, no experience or experimental results for pulverized materials other than coal are available. ii d without license from IHS Not for Resale