EN ISO 17830-2016 en Solid biofuels - Particle size distribution of disintegrated pellets《固体生物燃料破碎颗粒粒度分布(ISO 17830 2016)》.pdf

1、BSI Standards PublicationBS EN ISO 17830:2016Solid biofuels Particle size distribution ofdisintegrated pelletsBS EN ISO 17830:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 17830:2016. It supersedes BS EN 16126:2012 which is withdrawn.The UK participat

2、ion in its preparation was entrusted to Technical Committee PTI/17, Solid biofuels.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its

3、correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 81423 5 ICS 27.190; 75.160.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Po

4、licy and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17830 April 2016 ICS 75.160.10; 27.190 Supersedes EN 16126:2012English Version Solid biofuels - Particle size distribution o

5、f disintegrated pellets (ISO 17830:2016) Biocombustibles solides - Dtermination de la distribution granulomtrique des granuls dsintgrs (ISO 17830:2016) Biogene Festbrennstoffe - Bestimmung der Partikelgrenverteilung von Pellet-Ausgangsmaterial (ISO 17830:2016) This European Standard was approved by

6、CEN on 20 February 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand

7、ards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and no

8、tified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary,

9、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Ma

10、nagement Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17830:2016 EBS EN ISO 17830:2016EN ISO 17830:2016 (E) 3 European foreword This document (EN ISO 17830:2016) has been prepar

11、ed by Technical Committee ISO/TC 238 “Solid biofuels“ in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretariat of which is held by SIS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement,

12、at the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying a

13、ny or all such patent rights. This document supersedes EN 16126:2012. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark

14、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notic

15、e The text of ISO 17830:2016 has been approved by CEN as EN ISO 17830:2016 without any modification. BS EN ISO 17830:2016ISO 17830:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Reagents 16 Apparatus . 27 Sample preparation . 38 Procedure

16、. 38.1 Disintegration 38.2 Drying . 38.3 Moisture conditioning 38.4 Sieving 49 Calculation 410 Performance characteristics 611 Test report . 6Annex A (informative) Characteristics on determination of particle size distribution of material within pellets in accordance with the 2007 inter-comparison s

17、tudy . 7Bibliography 8 ISO 2016 All rights reserved iiiContents PageBS EN ISO 17830:2016ISO 17830:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma

18、lly 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, governmental and non-governmental, in liaison with ISO, also take part in th

19、e work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the

20、different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this documen

21、t may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/p

22、atents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO princ

23、iples in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 238, Solid biofuels.iv ISO 2016 All rights reservedBS EN ISO 17830:2016ISO 17830:2016(E)IntroductionIn power plants with powder fuel burner

24、s for energy production, the operators need information about the particle size distribution of the fuel for optimising particle burnout during combustion. Fuel preparation equipment, such as pulverizers, are used for crushing pellets into the original particle sizes before the material was pressed

25、into pellets. The method described in this International Standard is intended to characterize particle size distribution of the material contained within fuel pellets and also allows for a relative comparison of pellets of different manufacturing.This method is based on experience with pellets made

26、from sawdust, wood shavings and milled wood, as well as straw. The method may also be applicable for pellets produced from other solid biofuel materials provided that they can be dissolved into its constituents in water.Pellets that are engineered to resist water, e.g. pellets from materials which h

27、ave undergone some thermal treatments, cannot be characterised by this method. ISO 2016 All rights reserved vBS EN ISO 17830:2016BS EN ISO 17830:2016Solid biofuels Particle size distribution of disintegrated pellets1 ScopeThis International Standard aims to define the requirements and method used to

28、 determine particle size distribution of disintegrated pellets. It is applicable for pellets that fully disintegrate in hot water.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated refer

29、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 16559, Solid biofuels Terminology, definitions and descriptionsISO 17827-21), Solid biofuels Determination of particle size distribution for uncompresse

30、d fuels Part 2: Vibrating screen using sieves for classification of samples with apertures of 3,15 mm and belowISO 181341, Solid biofuels Determination of moisture content Oven dry method Part 1: Total moisture Reference methodEN 14778, Solid biofuels SamplingEN 14780, Solid biofuels Sample preparat

31、ion3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16559 and the following apply.3.1sieve fractionmaterial collected on a sieve4 PrincipleThe particle size distribution is determined after the sample pellets have been disintegrated in hot deionised wa

32、ter and dried in a drying cabinet or oven. The determination is performed by sieving the dried material in accordance with ISO 17827-2.5 ReagentsDeionised water.1) To be published.INTERNATIONAL STANDARD ISO 17830:2016(E) ISO 2016 All rights reserved 1BS EN ISO 17830:2016ISO 17830:2016(E)6 Apparatus6

33、.1 Disintegration container, water proof container made of material such as stainless steel capable of withstanding a temperature of 100 C. The container shall be able to hold at least 2 000 ml of the deionised water and the entire test portion of pellets without spilling over during stirring.A lid

34、or a cover, e.g. aluminium foil, shall be used to cover the container during the dissolving of the pellets in water.Volume of container should be about 5 l.6.2 Electric kettle or other suitable equipment for water heating, capable of heating at least 2 000 ml of water.6.3 Drying cabinet or oven, sha

35、ll be capable of maintaining a temperature of (60 5) C with at least three air exchanges per hour. The air velocity shall be such that the test sample particles are not dislodged from the drying container(s).NOTE Higher air exchange rates will shorten the drying time.6.4 Drying containers, shall con

36、sist of non-corrodible heat-resistant material such as metal, glass or porcelain and be able to hold sufficient volume to accommodate the slurry from the disintegration container.6.5 Balance, shall be capable of reading to the nearest 0,01 g.6.6 Sieves, set of sieves described in ISO 17827-2 and lis

37、ted in Table 1 shall be considered the default sieve set. However, other sieve sets can be used based on the specific requirements as agreed upon by the interested parties such as listed in Table 2.6.7 Weighing containers, an adequate number of weighing containers are required.The weighing of the si

38、eved particle fractions can be performed either by weighing the remaining material directly on the tarred weighed sieves or by collecting and weighing the material in weighing containers.6.8 Spoon, shall be made of non-corrodible material for stirring the disintegration slurry.6.9 Mechanical sieving

39、 equipment, sieving equipment in accordance with ISO 17827-2 shall be used for determination of the particle size distribution of the disintegrated pellets and to break down agglomerates of particles formed during the drying of the slurry.Some sieving machines have adjustable parameters. The results

40、 of the sieving might differ depending on how adjustable parameters are controlled. It is therefore important, for comparative purposes, to report how the adjustable parameters have set in terms of frequency, amplitude, duration, etc. If machines have adjustable dimensionless settings, an estimate o

41、f the adjustable degree shall be recorded to the best of the ability of the operator.6.10 Flat surfaced tool, or flat brush, shall be used for stirring the dried material and for separating agglomerated particles after drying and sieving.2 ISO 2016 All rights reservedBS EN ISO 17830:2016ISO 17830:20

42、16(E)7 Sample preparationThe laboratory sample used for the determination of particle size of disintegrated pellets shall be obtained in accordance with EN 14778 and a test sample shall be extract using volume reduction methods in accordance with EN 14780. The recommended size of the test sample is

43、(300 10) g.NOTE If a larger test sample is used, the amount of water, container sizes, etc. needs to be adjusted accordingly.8 Procedure8.1 DisintegrationThe test sample of pellets shall be transferred into the disintegration container.Approximately 2 000 ml of deionised water at the temperature jus

44、t below the boiling point shall be poured over the pellets. In order to avoid chemical dissolving components of the material, the water temperature shall not be maintained when the pellets are disintegrating. The amount of water used shall be sufficient to assure that the material fully absorbs its

45、maximum capacity of water. This is indicated by the presence of free water in the disintegration container after about 30 min.For pellets with high swelling ratio, such as straw pellets, the test sample can be reduced and/or the water volume be increased.Using a spoon, the slurry shall be carefully

46、stirred from the bottom and up until particles are segregated from each other.The spoon shall be rinsed with deionised water in the container ensuring that all particles remain in the slurry.The container shall be covered with a lid to protect from contamination and to prevent evaporation of water a

47、nd left for at least 30 min or as long as is required to disintegrate the pellets. Some pellets may require longer time for full disintegration.NOTE Some pellets can take 16 h to 24 h or more to disintegrate.8.2 DryingThe disintegrated slurry shall be mixed well and transferred to an adequate number

48、 of drying containers. The disintegration container shall be rinsed carefully with deionised water and emptied into the drying containers.Dry at a temperature not exceeding 60 C in a drying cabinet or oven to reach a moisture content of between 5 w-% and 15 w-%.NOTE The moisture content can be check

49、ed by periodic weighing provided that the exact weight of the empty drying container(s) and the exact weight and moisture content of the test sample are known.8.3 Moisture conditioningAfter drying is completed, stir the dried slurry with a flat surfaced tool to break up any agglomerates of particles or crust. The drying container(s) with the dried slurry are then placed in room atmosphere for at least 2 h in order for the material to reach moisture equilibrium with the room atmosphere.The equilibrated test sample of the disinte