1、December 2016 English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 75.160.40!%O“2596144www.din.deDI
2、N EN ISO 18846Solid biofuels Determination of fines content in quantities of pellets (ISO 18846:2016);English version EN ISO 18846:2016,English translation of DIN EN ISO 18846:2016-12Biogene Festbrennstoffe Bestimmung des Gehaltes an Feingut in Mengen von Pellets (ISO 18846:2016);Englische Fassung E
3、N ISO 18846:2016,Englische bersetzung von DIN EN ISO 18846:2016-12Biocombustibles solides Dtermination de la teneur en fines dans des chantillons de granuls (ISO 18846:2016);Version anglaise EN ISO 18846:2016,Traduction anglaise de DIN EN ISO 18846:2016-12www.beuth.deDocument comprises 11 pagesDTran
4、slation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN ISO 18846:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 18846:2016) has been prepared by Technical Committee ISO/TC 238 “Solid biofue
5、ls” in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” (Secretariat: SIS, Sweden). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-82 AA Biogene Festbrennstoffe.
6、 The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3310-2 DIN ISO 3310-2 ISO 14780 DIN EN ISO 14780 (at present at draft stage) ISO 16559 DIN EN ISO 16559 ISO 17225-1 DIN EN ISO 17225-1 ISO 17225-2 DIN EN ISO 17225-2 ISO 17225-6 DIN EN IS
7、O 17225-6 ISO 18135 DIN EN ISO 18135 (at present at draft stage) NOTE It is intended to publish ISO 17225-8, Solid biofuels Fuel specifications and classes Part 8: Graded thermally treated and densified biomass fuels, at ISO level as a “Technical Specification” (TS), not as an International Standard
8、. The TS will, however, not be adopted by CEN as a common European specification. Adoption of the document at German national level as DIN ISO/TS 17225-8 is currently being discussed. National Annex NA (informative) Bibliography E DIN EN ISO 14780, Solid biofuels Sample preparation DIN EN ISO 16559,
9、 Solid biofuels Terminology, definitions and description DIN EN ISO 17225-1, Solid biofuels Fuel specifications and classes Part 1: General requirements DIN EN ISO 17225-2, Solid biofuels Fuel specifications and classes Part 2: Graded wood pellets DIN EN ISO 17225-6, Solid biofuels Fuel specificatio
10、ns and classes Part 6: Graded non-woody pellets E DIN EN ISO 18135, Solid biofuels Sampling DIN ISO 3310-2, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 18846 September 2016 ICS 27.190; 75.160.10
11、 English Version Solid biofuels - Determination of fines content in quantities of pellets (ISO 18846:2016) Biocombustibles solides - Dtermination de la teneur en fines dans des chantillons de granuls(ISO 18846:2016) Biogene Festbrennstoffe - Bestimmung des Gehaltes an Feingut in Mengen von Pellets (
12、ISO 18846:2016) This European Standard was approved by CEN on 7 August 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 bibli
13、ographical references concerning such national standards 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 respons
14、ibility of a CEN member into its own language and notified 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 Repub
15、lic of Macedonia, France, Germany, Greece, Hungary, 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 NORMALI
16、SATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management 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 18846:2016 EForeword .4Introduction .51 Scope . 62 Normative references
17、 63 Terms and definitions . 64 Principle 65 Apparatus . 66 Sample preparation . 76.1 Sample reduction 76.2 Size of the test portion . 77 Procedure. 77.1 Sieving 77.2 Weighing . 88 Calculations 88.1 Total mass of all fractions 88.2 Proportion of fines . 88.3 Quality control . 89 Performance character
18、istics 810 Test report . 8Bibliography 9Contents PageEN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 2European foreword .3European foreword This document (EN ISO 18846:2016) has been prepared by Technical Committee ISO/TC 238 “Solid biofuels“ in collaboration with Technical Committee CEN/TC 335 “Soli
19、d 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, at the latest by March 2017, and conflicting national standards shall be withdrawn at the latest by March 2017.
20、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 any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organization
21、s of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
22、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 18846:2016 has been approved by CEN as EN ISO 18846:2016 without any modification. EN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 3 Forewo
23、rdISO (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 technica
24、l 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 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of ele
25、ctrotechnical 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 different approval criteria needed for the different types of ISO documents should be noted. This document was
26、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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such paten
27、t 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/patents). Any trade name used in this document is information given for the convenience of users and does not c
28、onstitute 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 principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe
29、 committee responsible for this document is ISO/TC 238, Solid biofuels.EN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 4 IntroductionThis International Standard describes a method for manual determination of the fines content in samples of pellets. The fines content is defined as the percentage in ma
30、ss of material below 3,15 mm in size. The fines content is an important parameter since excessive amounts of fines in consignments of pellets increases the risk for dust explosions and is also a health problem if the dust is inhaled.EN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 5 1 ScopeThis Intern
31、ational Standard specifies a method for determining the amount of material passing through a sieve with 3,15 mm diameter round hole.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated ref
32、erences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3310-2, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plateISO 147801), Solid biofuels Sample preparationISO
33、16559, Solid biofuels Terminology, definitions and descriptionsISO 181352), Solid biofuels Sampling3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16559 apply.4 PrincipleA test sample is subjected to sieving by means of manually shaking a sieve with 3
34、,15 mm diameter round holes by horizontal movements and the mass of the material passing through is determined.5 Apparatus5.1 Sieve. The sieve shall have round holes with a diameter of 3,15 mm and aperture geometry in accordance with ISO 3310-2. A sieve with a diameter of 400 mm is recommended. The
35、frame of the sieve shall have a height that enable the sieves to contain a sample and allows a free movement of the sample during the sieving process. Other sizes of sieves may be used for practical reasons but it is important to make sure the sieve is not overloaded which may result in insufficient
36、 agitation of the test sample which may impact the flow of fines through the apertures of the sieve.5.2 Collecting pan, for collection of material passing through the sieve, a collecting pan of adequate size is required.5.3 Weighing container, for weighing of the fractions, the collecting pan or a s
37、eparate container of adequate size is required.1) To be published.2) To be published. (Until ISO 18135 is published, EN 14778 should be used.)EN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 6 5.4 Balance. The balance shall be capable of reading to the nearest 0,1 g.The balance shall have a weighing c
38、apacity of 2 kg or a weighing capacity equal to the selected size of the sieve fractions and the mass of the weighing container.6 Sample preparation6.1 Sample reductionThe laboratory sample used for the determination of the fines content shall be obtained in accordance with ISO 18135. The sampling s
39、trategy shall be such that special provisions are taken regarding the tendency for stratification of the fines in a consignment of pellets. For example, the entire quantity of pellets in a bag shall be sampled in order to obtain a representative test sample. Due to the special provisions necessary r
40、egarding sampling for fines determination, the combined (raw) sample may end up being very large. The combined sample may be divided into one or more smaller test portions using a procedure for sample division in accordance with ISO 147803).NOTE In bulk handling of large volumes of pellets, there is
41、 often a risk for stratification of materials in storage bins. There is also the risk of incremental variations of fines in volumes of pellets due to batch-wise operation during transportation with rail cars, trucks and ocean vessels.6.2 Size of the test portionThe size of the test portion shall be
42、selected in relation to pellets diameter as given in Table 1.NOTE A larger size of the test portion will yield a higher accuracy (e.g. 1 % according to ISO 17225-1, ISO 17225-2 and ISO 17225-6).Table 1 Minimum mass of test portion for pellet diameter classes in accordance with ISO 17225-1, ISO 17225
43、-2 and ISO 17225-6Pellet diametermmSample sizekgMinimum Recommended12 (up to 25) 10 15 to 20The total mass of the test portion shall be weighed to the nearest 0,1 g and recorded for the quality control calculation in 8.3.7 Procedure7.1 SievingThe sieving shall be done in such a way that the fine par
44、ticles are separated from the pellets but at the same time avoiding new fines being created. This is best achieved by 5 to 10 circular horizontal rotations of 0,5 kg of material in the sieve. If a sieve with a diameter other than 400 mm is used, the size of the sieved sub-portions (of the test porti
45、on) shall be adjusted to achieve the same degree of filling of the sieve.After each sub-portion is sieved, the fines in the collecting pan shall be transferred to a weighing container or if practical the fines may be left in the collecting pan as fines from subsequent sub-portions 3) To be published
46、. (Until ISO 14780 is published, EN 14780 should be used.)EN ISO 18846:2016 (E) DIN EN ISO 18846:2016-12 7 collected. The coarse material retained on the sieve from each sub-portion shall be transferred to another container.7.2 WeighingAfter completing the sieving of all sub-portions of the test por
47、tion, weigh the total amount of material which passed through the sieve (the fines fraction) and weigh the total amount of material retained on the sieve (the coarse fraction).The weighing of the fines fraction can be performed either by weighing the collecting pan with the fines fraction and subtra
48、cting the mass of the empty collecting pan, or the fines fraction can be transferred to a tared weighing container for determining the mass of the fraction.8 Calculations8.1 Total mass of all fractionsCalculate the total mass of all fractions as the sum of the mass of the fines fraction and the mass of the coarse fraction.8.2 Proportion of finesCalculate the
