1、BS EN ISO 17827-2:2016Solid biofuels Determinationof particle size distribution foruncompressed fuelsPart 2: Vibrating screen method using sieveswith aperture of 3,15 mm and below (ISO17827-2:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 17827-2:2016
2、 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 17827-2:2016. It supersedes BS EN 15149-2:2010 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee PTI/17, Solid biofuels.A list of organizations represented on this
3、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 correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 81469 3 ICS 7
4、5.160.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD
5、 NORME EUROPENNE EUROPISCHE NORM EN ISO 17827-2 May 2016 ICS 27.190; 75.160.10 Supersedes EN 15149-2:2010English Version Solid biofuels - Determination of particle size distribution for uncompressed fuels - Part 2: Vibrating screen method using sieves with aperture of 3,15 mm and below (ISO 17827-2:
6、2016) Biocombustibles solides - Dtermination de la distribution granulomtrique des combustibles non comprims - Partie 2: Mthode au tamis vibrant douverture de maille infrieure ou gale 3,15 mm (ISO 17827-2:2016) Biogene Festbrennstoffe - Bestimmung der Partikelgrenverteilung fr unkomprimierte Brennst
7、offe - Teil 2: Vertikales Rttelsiebverfahren mit Sieben mit einer Lochgre von 3,15 mm und darunter (ISO 17827-2:2016) This European Standard was approved by CEN on 30 April 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
8、European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical 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 ver
9、sions (English, French, German). A version in any other language made by translation under the responsibility 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
10、, 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, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
11、Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION 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 na
12、tional Members. Ref. No. EN ISO 17827-2:2016 EBS EN ISO 17827-2:2016EN ISO 17827-2:2016 (E) 3 European foreword This document (EN ISO 17827-2:2016) has been prepared by Technical Committee ISO/TC 238 “Solid biofuels“ in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretari
13、at 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 November 2016, and conflicting national standards shall be withdrawn at the latest by November 2016. Attention is drawn
14、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. This document supersedes EN 15149-2:2010. According to the CEN-CENELEC Internal Regulations, the national
15、 standards organizations 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, Lithuan
16、ia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17827-2:2016 has been approved by CEN as EN ISO 17827-2:2016 without any modification. BS EN ISO 17827-2:2016ISO 17
17、827-2:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus . 25.1 Sieves . 25.2 Collecting pan . 25.3 Weighing containers . 25.4 Brush . 25.5 Mechanical sieving equipment 25.6 Balance . 36 Sample preparation . 36.1 Sample size . 36.2 Moisture condi
18、tioning 47 Procedure. 48 Calculation 59 Performance characteristics 610 Test report . 6Annex A (normative) Determination of the median value of a particle size distribution 7Annex B (informative) Guidance data on performance characteristics. 9Bibliography .10 ISO 2016 All rights reserved iiiContents
19、 PageBS EN ISO 17827-2:2016ISO 17827-2:2016(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 normally carried out through ISO technical committees. Each memb
20、er 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 the work. ISO collaborates closely with the International Ele
21、ctrotechnical 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 different approval criteria needed for the different types
22、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 document may be the subject of patent rights. ISO shall not be hel
23、d 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/patents).Any trade name used in this document is information
24、 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 principles in the Technical Barriers to Trade (TBT) see the foll
25、owing URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 238, Solid biofuels.ISO 17827 consists of the following parts, under the general title Solid biofuels Determination of particle size distribution for uncompressed fuels: Part 1: Oscillating screen me
26、thod using sieves with apertures of 3,15 mm and above Part 2: Vibrating screen method using sieves with apertures of 3,15 mm and belowPart 2 can also be used for round hole sieves with apertures of 4,0 and 5,6 mm.iv ISO 2016 All rights reservedBS EN ISO 17827-2:2016INTERNATIONAL STANDARD ISO 17827-2
27、:2016(E)Solid biofuels Determination of particle size distribution for uncompressed fuels Part 2: Vibrating screen method using sieves with aperture of 3,15 mm and below1 ScopeThis part of ISO 17827 specifies a method for the determination of the size distribution of particulate biofuels by the vibr
28、ating screen method. The method described is meant for particulate biofuels only, namely, materials that either have been reduced in size, such as most wood fuels, or are physically in a particulate form. This part of ISO 17827 applies to particulate uncompressed fuels with a nominal top size of 3,1
29、5 mm and below (e.g. sawdust).2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
30、document (including any amendments) applies.ISO 3310-1, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire clothISO 3310-2, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plateISO 147801), Solid biofuels Sample preparationISO 1655
31、9, Solid biofuels Terminology, definitions and descriptionsISO 17225-1, Solid biofuels Fuel specifications and classes Part 1: General requirementsISO 18134-1, Solid biofuels Determination of moisture content Oven dry method Part 1: Total moisture Reference methodISO 18134-2, Solid biofuels Determin
32、ation of moisture content Oven dry method Part 2: Total moisture Simplified methodISO 181351), Solid biofuels Sampling3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16559 apply.4 PrincipleA laboratory sample is subjected to sieving through vibrating
33、sieves, sorting the particles in decreasing size classes by mechanical means.NOTE Manual sieving is excluded due to the fact that small sieve holes could easily be clogged by particles.1) To be published. ISO 2016 All rights reserved 1BS EN ISO 17827-2:2016ISO 17827-2:2016(E)5 Apparatus5.1 SievesFor
34、 the test, an appropriate number of either circular or rectangular sieves with a minimum effective sieve area of 250 cm2is required. For laboratory samples with a top size below 3,15 mm, the sieves shall have an aperture geometry in accordance with ISO 3310-1 (metal wire cloth) and for test material
35、s with a top size 3,15 mm or above, the sieves shall have round perforated holes in metal plate in accordance with ISO 3310-2 (perforated metal plate). The frame of the sieves shall have a height that enables the sieves to contain the samples and allows a free movement of the sample during the sievi
36、ng process.The number of sieves and the aperture sizes of the sieves shall be chosen with the size specification for the actual laboratory sample material in accordance with ISO 17225-1. For sawdust and similar fine grade materials, the following set of sieves is recommended: 3,15 mm round holes; 2,
37、8 mm metal wire cloth; 2,0 mm metal wire cloth; 1,4 mm metal wire cloth; 1,0 mm metal wire cloth; 0,5 mm metal wire cloth; 0,25 mm metal wire cloth.NOTE If further classification of larger particles is required, sieves with round holes with an aperture of 4,0 mm and 5,6 mm can be applied.5.2 Collect
38、ing panFor collection of material passing through the sieves, a collecting pan of adequate size is required.5.3 Weighing containersThe weighing of the sieved particle fractions can be performed either by weighing the remaining material directly on the tarred weighed sieves or by collecting and weigh
39、ing the material in weighing containers. For this purpose, an adequate number of weighing containers are required.5.4 BrushFor cleaning the sieves, a brush is required.5.5 Mechanical sieving equipmentThe mechanical device (sieving machine) shall apply a vibration on the sieves. Some sieving machines
40、 have adjustable parameters. The results of the sieving may differ depending on how adjustable parameters are controlled. It is therefore important for comparative purposes to report how adjustable parameters have been used in terms of frequency, amplitude, duration, etc. If machines have adjustable
41、, dimensionless settings, an estimate of the adjustable degree shall be recorded to the best of the ability of the operator.For a principle drawing of the sieving operation, see Figure 1.NOTE Be aware that vibrating at an amplitude that is too low might lead to incomplete particle segregation. The m
42、inimum amplitude can be determined by pre-tests.2 ISO 2016 All rights reservedBS EN ISO 17827-2:2016ISO 17827-2:2016(E)1234Key1 increasing hole diameter2 material addition3 material flow direction4 vibration directionFigure 1 Principle of the sieving operation5.6 BalanceThe balance shall be capable
43、of reading to the nearest 0,01 g.6 Sample preparation6.1 Sample sizeThe laboratory sample shall be obtained in accordance with ISO 18135 and a test sample of minimum 50 g shall be extracted using volume reduction methods in accordance with ISO 14780. To prevent overloading of the sieves, the height
44、of the layer of material on the upper sieve shall never exceed 2 cm. If the material height does exceed 2 cm, then the test sample shall be divided into test portions, which ISO 2016 All rights reserved 3BS EN ISO 17827-2:2016ISO 17827-2:2016(E)are processed in sequential sieving operations. The res
45、ults of the separate determinations of the test portions shall be combined in accordance with Clause 8.The laboratory sample shall include sufficient material for determination of size distribution and moisture content.6.2 Moisture conditioningThe test sample shall be sieved at a moisture content be
46、low 20 w-% wet basis, thus preventing the particles from sticking together or losing significant amount of moisture during the sieving process. If necessary, the test sample shall be pre-dried. Drying is done in accordance with ISO 14780.NOTE By pre-drying, as described in ISO 14780, the laboratory
47、sample is brought into equilibrium with the humidity of the surrounding atmosphere.Determine the moisture content of the material to be sieved on a separate test portion by following the procedure given in ISO 18134-1 or ISO 18134-2. The moisture content shall be determined and reported concurrently
48、 with the particle size distribution determination.7 ProcedureThe test sample to be used for sieving shall be weighed to the nearest 0,01 g.Assemble and operate the mechanical shaking device with the appropriate sieves with decreasing aperture, ending with the collecting pan at the bottom. If the si
49、ze of the test sample is significantly larger than the minimum 50 g proposed in 6.1, the test sample shall be divided into two or more test portions, which are to be processed subsequently.Spread the material in an even layer on the top sieve and start the sieving operation. As a pre-test, a sieving operation shall be continued until the mass changes between two sequential sieves do not exceed a maximum of 0,3 % of the sample mass under test per 1 min time of sieving operation. As an alternative
