1、Stationary source emissions Determination of the mass concentration of sulphur dioxide by instrumental techniques PD CEN/TS 17021:2017 BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National foreword This Published Document is the UK implementation of CEN/TS 17021:
2、2017. The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subcommittee EH/2/3, Ambient atmospheres. 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 n
3、ecessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017. Published by BSI Standards Limited 2017 ISBN 978 0 580 90013 6 ICS 13.040.40 Compliance with a British Standard cannot confer immunity from legal obligations. This Published
4、Document was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD CEN/TS 17021:2017 TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 1702
5、1 January 2017 ICS 13.040.40 English Version Stationary source emissions - Determination of the mass concentration of sulphur dioxide by instrumental techniques missions de sources fixes - Dtermination de la concentration massique en dioxyde de soufre par des techniques instrumentales Emissionen aus
6、 stationren Quellen - Ermittlung der Massenkonzentration von Schwefeldioxid mit instrumentellen Verfahren This Technical Specification (CEN/TS) was approved by CEN on 23 October 2016 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two yea
7、rs the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be 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 nat
8、ional level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the 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, Bulgaria, C
9、roatia, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, T
10、urkey 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 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members
11、. Ref. No. CEN/TS 17021:2017 E PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 2 Contents Page European foreword . 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Symbols and abbreviations 11 4.1 Symbols 11 4.2 Abbreviated terms . 12 5 Principle 12 5.1 General . 12 5.2 Measuring princip
12、le 12 6 Description of the measuring system . 13 6.1 General . 13 6.2 Sampling and sample gas conditioning system . 14 6.3 Analyser equipment 16 7 Performance characteristics of the method . 16 8 Suitability of the measuring system for the measurement task . 18 9 Field operation 18 9.1 Measurement s
13、ection and measurement plane 18 9.2 Sampling strategy. 19 9.3 Choice of the measuring system . 19 9.4 Setting of the measuring system on site 20 10 Ongoing quality control . 22 10.1 Introduction . 22 10.2 Frequency of checks 22 11 Expression of results . 23 12 Measurement report . 23 Annex A (inform
14、ative) Example of uncertainty estimation for the method and compliance with required emissions measurement uncertainty 24 A.1 General . 24 A.2 Elements required for the uncertainty determinations 24 A.3 Example uncertainty budget 27 A.4 Evaluation of compliance with a required measurement uncertaint
15、y . 32 Annex B (informative) Calculation of the uncertainty associated with a concentration expressed under dry conditions and at an oxygen reference concentration . 34 B.1 Uncertainty associated with a concentration expressed under dry conditions 34 B.2 Uncertainty associated with a concentration e
16、xpressed at a O 2 reference concentration 36 Annex C (normative) Annual lack of fit test . 38 PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 3 C.1 Description of test procedure 38 C.2 Establishment of the regression line . 38 C.3 Calculation of the residuals . 39 C.4 Test requirements 39 Annex D (informa
17、tive) Annual check of conditioning system . 40 D.1 General . 40 D.2 Demonstration via proficiency testing scheme participation 40 D.3 Demonstration via direct user testing of conditioning system 40 Annex E (informative) Procedure for correction of data from drift effect 42 Annex F (informative) Chem
18、istry of SO 2 aqueous solubility 44 Bibliography . 45 PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 4 European foreword This document (CEN/TS 17021:2017) has been prepared by Technical Committee CEN/TC 264 “Air quality”, the secretariat of which is held by DIN. Attention is drawn to the possibility that
19、 some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to announce this T
20、echnical Specification: 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, Netherlands, Norway, Poland, Portugal, Romania, Serb
21、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 5 1 Scope This Technical Specification describes a method for sampling and determining the concentration of gaseous sulphur dioxide (SO 2) emissions from stacks. This method i
22、s based on instrumental techniques. It is applicable to both periodic measurements and the calibration of automated measuring systems permanently installed on stacks, for regulatory or other purposes. 2 Normative references The following documents, in whole or in part, are normatively referenced in
23、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 document (including any amendments) applies. EN 15259:2007, Air quality - Measurement of stationary source emissions - Requireme
24、nts for measurement sections and sites and for the measurement objective, plan and report EN 14793:2016, Stationary source emission - Demonstration of equivalence of an alternative method with a reference method EN 15267-4, Air quality - Certification of automated measuring systems - Part 4: Perform
25、ance criteria and test procedures for automated measuring systems for periodic measurements of emissions from stationary sources EN ISO 14956:2002, Air quality - Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956:2002) ISO/IEC Gu
26、ide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 standard reference method SRM reference method prescribed by European or national le
27、gislation SOURCE: EN 15259:2007 3.2 reference method RM measurement method taken as a reference by convention, which gives the accepted reference value of the measurand NOTE 1 A reference method is fully described. NOTE 2 A reference method can be a manual or an automated method. NOTE 3 Alternative
28、methods can be used if equivalence to the reference method has been demonstrated. SOURCE: EN 15259:2007 PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 6 3.3 alternative method AM measurement method which complies with the criteria given by this Technical Specification with respect to the reference method
29、 Note 1 to entry: An alternative method can consist of a simplification of the reference method. SOURCE: EN 14793:2017 3.4 measuring system set of one or more measuring instruments and often other devices, including any reagent and supply, assembled and adapted to give information used to generate m
30、easured quantity values within specified intervals for quantities of specified kinds SOURCE: JCGM 200:2012 3.5 automated measuring system AMS entirety of all measuring instruments and additional devices for obtaining a result of measurement Note 1 to entry: Apart from the actual measuring device (th
31、e analyser), an AMS includes facilities for taking samples (e.g. probe, sample gas lines, flow meters and regulator, delivery pump) and for sample conditioning (e.g. dust filter, pre-separator for interferents, cooler, converter). This definition also includes testing and adjusting devices that are
32、required for functional checks and, if applicable, for commissioning. Note 2 to entry: The term “automated measuring system” (AMS) is typically used in Europe. The term “continuous emission monitoring system” (CEMS) is also typically used in the UK and USA. SOURCE: EN 15267-4:2017 3.6 portable autom
33、ated measuring system P-AMS automated measuring system which is in a condition or application to be moved from one to another measurement site to obtain measurement results for a short measurement period Note 1 to entry: The measurement period is typically 8 h for a day. Note 2 to entry: The P-AMS c
34、an be configured at the measurement site for the special application but can be also set-up in a van or mobile container. The probe and the sample gas lines are installed often just before the measurement task is started. SOURCE: EN 15267-4:2017 PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 7 3.7 calibr
35、ation set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring method or measuring system, and the corresponding values given by the applicable reference Note 1 to entry: In case of automated measuring system (AMS) permanent
36、ly installed on a stack the applicable reference is the standard reference method (SRM) used to establish the calibration function of the AMS. Note 2 to entry: Calibration should not be confused with adjustment of a measuring system. SOURCE: EN 15058:2017 3.8 adjustment set of operations carried out
37、 on a measuring system so that it provides prescribed indications corresponding to given values of a quantity to be measured Note 1 to entry: The adjustment can be made directly on the instrument or using a suitable calculation procedure. SOURCE: EN 15058:2017 3.9 span gas test gas used to adjust an
38、d check a specific point on the response line of the measuring system Note 1 to entry: This concentration is often chosen around 80 % of the upper limit of the range 3.10 measurand particular quantity subject to measurement SOURCE: EN 15259:2007 Note 1 to entry: The measurand is a quantifiable prope
39、rty of the stack gas under test, for example mass concentration of a measured component, temperature, velocity, mass flow, oxygen content and water vapour content. 3.11 interference negative or positive effect upon the response of the measuring system, due to a component of the sample that is not th
40、e measurand 3.12 influence quantity quantity that is not the measurand but that affects the result of the measurement Note 1 to entry: Influence quantities are e.g. presence of interfering gases, ambient temperature, pressure of the gas sample. 3.13 ambient temperature temperature of the air around
41、the measuring system PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 8 3.14 emission limit value ELV limit value given in regulations such as EU Directives, ordinances, administrative regulations, permits, licences, authorizations or consents Note 1 to entry: ELV can be stated as concentration limits expr
42、essed as half-hourly, hourly and daily averaged values, or mass flow limits expressed as hourly, daily, weekly, monthly or annually aggregated values. 3.15 measurement site place on the waste gas duct in the area of the measurement plane(s) consisting of structures and technical equipment, for examp
43、le working platforms, measurement ports, energy supply Note 1 to entry: Measurement site is also known as sampling site. SOURCE: EN 15259:2007 3.16 measurement plane plane normal to the centreline of the duct at the sampling position Note 1 to entry: Measurement plane is also known as sampling plane
44、. SOURCE: EN 15259:2007 3.17 measurement port opening in the waste gas duct along the measurement line, through which access to the waste gas is gained Note 1 to entry: Measurement port is also known as sampling port or access port. SOURCE: EN 15259:2007 3.18 measurement line line in the measurement
45、 plane along which the measurement points are located, bounded by the inner duct wall Note 1 to entry: Measurement line is also known as sampling line. SOURCE: EN 15259:2007 3.19 measurement point position in the measurement plane at which the sample stream is extracted or the measurement data are o
46、btained directly Note 1 to entry: Measurement point is also known as sampling point. SOURCE: EN 15259:2007 PD CEN/TS 17021:2017CEN/TS 17021:2017 (E) 9 3.20 performance characteristic one of the quantities (described by values, tolerances, range) assigned to equipment in order to define its performan
47、ce 3.21 response time duration between the instant when an input quantity value of a measuring instrument or measuring system is subjected to an abrupt change between two specified constant quantity values and the instant when a corresponding indication settles within specified limits around its fin
48、al steady value Note 1 to entry: By convention time taken for the output signal to pass from 0 % to 90 % of the final variation of indication. 3.22 short-term zero drift difference between two zero readings at the beginning and at the end of the measurement period 3.23 short-term span drift differen
49、ce between two span readings at the beginning and at the end of the measurement period 3.24 lack of fit systematic deviation within the range of application between the measurement result obtained by applying the calibration function to the observed response of the measuring system measuring test gases and the corresponding accepted value of such test gases Note 1 to entry: Lack of fit can be a function of the measurement result. Note 2 to entry: The expression “lack of fit” is often replaced in everyday language by “linearity” or “deviation fro
