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1、DRAFT FOR DEVELOPMENT DD CEN/TS 15415:2006 Solid recovered fuels Determination of particle size distribution by screen method ICS 75.160.10 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 15415:2006
2、 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006 ISBN 0 580 49554 X National foreword This Draft for Development was published by BSI. It is the UK implementation of CEN/TS 15415:2006. This publication is not to
3、 be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained. Comments arising from the use of
4、 this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be initiated not later than 3 years after its publication by the European organization so that a decis
5、ion can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion
6、into a European Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL. The UK participation in its preparation was entrusted
7、to Technical Committee PTI/17, Solid biofuels. A list of organizations represented on PTI/17 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. Amendments issued sinc
8、e publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 15415 October 2006 ICS 75.160.10 English Versio
9、n Solid recovered fuels - Determination of particle size distribution by screen method Combustibles solides de rcupration - Dtermination de la granulomtrie et de sa distribution par mthode par tamisage Feste Sekundrbrennstoffe - Bestimmung der Teilchengrenverteilung mittels Siebanalyse This Technica
10、l Specification (CEN/TS) was approved by CEN on 25 March 2006 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be
11、converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the
12、 CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
13、embourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll r
14、ights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 15415:2006: E Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Contents Page Foreword3 1 Scope 4
15、2 Normative references4 3 Terms and definitions .4 4 Principle4 5 Apparatus .4 6 Sampling and sample preparation.6 7 Procedure .7 8 Calculation of results 9 9 Precision.9 10 Test report10 Bibliography11 CEN/TS 15415:2006 Licensed Copy: London South Bank University, London South Bank University, Tue
16、Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Foreword This document (CEN/TS 15415:2006) has been prepared by Technical Committee CEN/TC 343 “Solid recovered fuels”, the secretariat of which is held by SFS. According to the CEN/CENELEC Internal Regulations, the national standards orga
17、nizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romani
18、a, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CEN/TS 15415:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 1 Scope This Technical Specification specifies the determination of
19、particle size distribution of solid recovered fuels by a machine or manual sieving method. It applies to particulate agglomerated and non-agglomerated fuels, such as fluff, pellets, briquettes, pulverised solid recovered fuels. NOTE 1 For fine particles 3,15 mm, it is recommended to use sieves with
20、hole diameters of 3,15 mm, 6,3 mm, 12,5 mm, 25 mm, 50 mm, 100 mm and 125 mm, and for solid recovered fuels 125 Manual sorting 100 to 125 1st sieve (50 mm) 50 to 100 2nd sieve (25 mm) 25 to 50 3rd sieve (12,5 mm) 12,5 to 25 4th sieve (6,3 mm) 6,3 to 12,5 5th sieve (3,15 mm) 3,15 to 6,3 Collecting pan
21、 125 mm) Number of overlong (100 to 125 mm) Length of longest particle overall, in millimetres (if required) Difference between the total mass of test portion and the total mass of all fractions (column 4), in percent of the total test portion Moisture content of the sample, in percent Raw or air-dr
22、ied sieving Manual or machine sieving Metal wire cloth or perforated metal plate Trade form (e. g. fluff, pellets, briquettes) NOTE 1 For smaller sieves, it can be convenient to combine two or more sieves in the same sieving operation. Ensure that the sieves (particularly the lower sieves) do not cl
23、og because of a too great mass on the upper sieve. If a sieve is mostly or entirely clogged, decrease the mass of the sub-samples such that there is no clogging on any sieves and repeat the test. NOTE 2 In many cases, it is useful to identify the greatest particle (maximum dimension) and record it i
24、n a scheme according to Table 1. The information on the longest particle can be required for computing the median particle size or for illustrating the results in a cumulative size distribution curve. CEN/TS 15415:2006 Licensed Copy: London South Bank University, London South Bank University, Tue De
25、c 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 9 When size classification by sieving, some of the thin particles longer than the hole diameter will pass the sieve and mix with the particles in the smaller size fractions. Most of these particles remain in that fraction. Only particles great
26、er than 100 mm (maximum dimension) shall be manually sorted as specified above. 7.3 Mechanical sieving Assemble and operate the mechanical shaking device with the appropriate sieve sizes with decreasing aperture size ending with the collecting pan. Weigh the sample to the nearest 0,1 g. Spread the s
27、ample (sub-sample) in an even layer on the top sieve and start the sieving operation. Weigh the retained net material on each sieve and in the collecting pan to the nearest of 0,1 g. In the case that a particle sticks in a sieving hole, it shall be removed and added to the fraction, which has remain
28、ed on the sieve (as if it did not pass the hole). All particles greater than 100 mm (maximum dimension) shall be manually classified into one or more fractions regardless from which sieve or collecting pan they are collected. In this case, the size is defined as maximum length of the particle. Recor
29、d the mass of each fraction in a scheme according to Table 1. Ensure that the sieves (particularly the lower sieves) do not clog because of a too great mass on the upper sieve. If a sieve is mostly or entirely clogged, decrease the mass of the sub-samples such that there is no clogging on any sieves
30、 and repeat the test. When size classification by sieving, some of the thin particles longer than the hole diameter will pass the sieve and mix with the particles in the smaller size fractions. Most of these particles will remain in that fraction. Only particles greater than 100 mm (maximum dimensio
31、n) shall be manually sorted as specified above. NOTE 1 In many cases, it is useful to identify the largest particle (maximum dimension) and record it in a scheme according to Table 1. The information on the longest particle can be required for computing the median particle size or for illustrating t
32、he results in a cumulative size distribution curve. NOTE 2 During the sieving operation, particularly fine particles can stick on the edge of the sieves due to static electricity. Since this problem mostly is connected to the intensity of the mechanical shaking operation, it should be taken into con
33、sideration in a separate pre-test for each equipment and solid recovered fuel sample materials. Grounding the sieves using a copper wire can reduce the problem with static electricity. 8 Calculation of results The results shall be expressed as a percentage of the total mass of all fractions. If more
34、 than one sample (sub-sample) is processed, the mass of the respective fractions shall be added up before calculating the overall percentage of each class. An example of this procedure is shown in Table 1. The difference between the total mass of test portion and the total mass of all fractions shal
35、l be less than 2 %. Larger differences can occur due to lost or retained particles or due to changes in moisture content. In this case, the causes for the deviation shall be investigated and the measurement repeated. In case this is impossible or the result still deviates more than accepted, this sh
36、all be reported. 9 Precision Because of the varying nature of solid recovered fuels covered by this Technical Specification it is not possible at the present time to give a precision statement (repeatability or reproducibility) for this test method. CEN/TS 15415:2006 Licensed Copy: London South Bank
37、 University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 10 10 Test report The test report shall include at least the following information: a) name of the testing establishment; b) date of the test; c) a reference to this Technical Specification, i.e
38、. CEN/TS 15415; d) identification of the product or sample tested; e) test results as shown in Table 1; f) if the difference of 2 % between the total mass of test portion and the total mass of all fractions, in percent, of the total test portion according to Table 1, column (4), has been exceeded, i
39、t shall be clearly stated and, if necessary, founded why the test has not been repeated; g) any deviation from this Technical Specification; h) any unusual features observed during the determination which may affect the result and details of any operations not included in this Technical Specificatio
40、n or regarded as optional. CEN/TS 15415:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 11 Bibliography 1 ISO 13320-1, Particle size analysis Laser diffraction methods Part 1: General principles 2 CEN/TS 1
41、5149-1, Solid biofuels Methods for the determination of particle size distribution Part 1: Oscillating screen method using sieve apertures of 3,15 mm and above 3 ISO 2395, Test sieves and test sieving Vocabulary 4 ISO 565, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet
42、Nominal sizes of openings CEN/TS 15415:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:44:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 15415:2006 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent
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