1、May 2017 English price group 21No 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 13.040.40!%e“2665999www.din.deDIN EN
2、 14792Stationary source emissions Determination of mass concentration of nitrogen oxides Standard reference method: chemiluminescence;English version EN 14792:2017,English translation of DIN EN 14792:2017-05Emissionen aus stationren Quellen Bestimmung der Massenkonzentration von Stickstoffoxiden Sta
3、ndardreferenzverfahren: Chemilumineszenz;Englische Fassung EN 14792:2017,Englische bersetzung von DIN EN 14792:2017-05Emissions de sources fixes Dtermination de la concentration massique des oxydes dazote Mthode de rfrence normalise: chimiluminescence;Version anglaise EN 14792:2017,Traduction anglai
4、se de DIN EN 14792:2017-05SupersedesDIN EN 14792:200604www.beuth.deDocument comprises 60 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17This standard has been included in the VDI/DIN Handbook on air quality, Volume 5. DIN
5、 EN 14792:2017-05 2 A comma is used as the decimal marker. National foreword This document (EN 14792:2017) has been prepared by Working Committee CEN/TC 264/WG 16 “Reference measurement methods for NOx, SO2, O2, CO and water vapour emissions” (Secretariat and Convenership: AFNOR, France) of Technica
6、l Committee 264 “Air quality” (Secretariat: DIN, Germany), with the active participation of German experts of Kommission Reinhaltung der Luft im VDI und DIN Normenausschuss KRdL (Commission on Air Pollution Prevention of VDI and DIN Standards Committee KRdL). The responsible German body involved in
7、its preparation was VDI/DIN-Kommission Reinhaltung der Luft (KRdL) Normenausschuss, Working Committee NA 134-04-01 AA “Emission measurement techniques”. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5725-2 DIN ISO 5725-2 ISO 5725-6 DI
8、N ISO 5725-6 Amendments This standard differs from DIN EN 14792:2006-04 as follows: a) in Clause 1, Directive 2000/76/EC has been replaced by Directive 2010/75/EU; b) in Clause 2, the normative reference to EN 13284-1 has been replaced by EN 15259 regarding requirements for measurement sections and
9、sites and for the measurement objective, plan and report; the normative reference to EN 15267-4:2017 regarding performance criteria and test procedures for portable automated measuring systems for monitoring emissions from stationary sources has been included; c) in Clause 3, definitions have been r
10、evised taking into account EN 15259 definitions and the new version of VIM (2012); the detection limit has been deleted from the list of definitions and performance characteristics as repeatability at zero is more suitable; d) in Clause 4, symbols and abbreviations used in the main section of the do
11、cument have been included; e) in 6.1, it is specified that the use of configuration 1 is avoided when the NO2concentration is more than 20 mg/m3; configuration 1 shall be ordinarily avoided when the NO2/NOxratio is more than 25 %, unless it is demonstrated that the losses of NO2have not been signifi
12、cant within the gas cooler; f) 6.3 corresponds to the former Clause 6; g) in Clause 7, it is specified that the performance characteristics are to be determined in a general performance test according to the test procedures described in EN 15267-4 instead of those in EN 15267-3; h) in 9.2, a referen
13、ce to EN 15259 has been included for determining homogeneity of the flue gas profile; i) in 9.4.2.1, it has been specified that test gases are to have concentrations traceable to SI units; DIN EN 14792:2017-05 3 j) in 9.4.3, an equation to calculate the concentration corrected when drift occurs has
14、been included; k) in Clause 11, the expression of results has been modified to be in line with EN 15259; l) in Clause 13, the standard deviation sr,limithas been recalculated according to new rules specified in EN 14793; m) in Annex A, an estimate of the expanded uncertainty calculated on the basis
15、of reproducibility has been included and has replaced the expression “reproducibility confidence interval”; n) a new Annex E “Calculation of the uncertainty associated with a concentration expressed for dry gas and at an oxygen reference concentration” has been included. o) in Annex G, the presentat
16、ion of the calculation of the uncertainty budget has been improved; p) in Annex H, typing errors in the table to determine the drift have been corrected. Previous editions DIN EN 14792: 2006-04 DIN EN 14792:2017-05 4 National Annex NA (informative) Bibliography DIN ISO 5725-2, Accuracy (trueness and
17、 precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method DIN ISO 5725-6, Accuracy (trueness and precision) of measurement methods and results Part 6: Use in practice of accuracy values EUROPEAN STA
18、NDARD NORME EUROPENNE EUROPISCHE NORM EN 14792 January 2017 ICS 13.040.40 Supersedes EN 14792:2005English Version Stationary source emissions - Determination of mass concentration of nitrogen oxides - Standard reference method: chemiluminescence Emissions de sources fixes - Dtermination de la concen
19、tration massique des oxydes dazote - Mthode de rfrence normalise : chimiluminescence Emissionen aus stationren Quellen - Bestimmung der Massenkonzentration von Stickstoffoxiden - Standardreferenzverfahren: Chemilumineszenz This European Standard was approved by CEN on 26 September 2016. CEN members
20、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 standards may be obtained on application t
21、o 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 notified to the CEN-CENELEC Management
22、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, Iceland, Ireland, Italy, Latvia, Lith
23、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marn
24、ix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14792:2017 EEN 14792:2017 (E) 2 Contents Page European foreword . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Symbols and abbreviati
25、ons 13 4.1 Symbols 13 4.2 Abbreviated terms . 14 5 Principle 14 5.1 General . 14 5.2 Measuring principle 14 6 Description of the measuring system . 15 6.1 General . 15 6.2 Sampling and sample gas conditioning system . 16 6.2.1 Sampling probe . 16 6.2.2 Filter 17 6.2.3 Sample gas line 17 6.2.4 Sample
26、 gas conditioning system . 17 6.2.5 Sample gas pump 18 6.2.6 Secondary filter . 18 6.2.7 Flow controller and flow meter 18 6.3 Analyser equipment 18 6.3.1 General . 18 6.3.2 Converter 19 6.3.3 Ozone generator . 19 6.3.4 Reaction chamber 19 6.3.5 Optical filter . 19 6.3.6 Photomultiplier tube 20 6.3.
27、7 Ozone removal 20 7 Performance characteristics of the SRM 20 8 Suitability of the measuring system to the measurement task . 21 9 Field operation 22 9.1 Measurement planning 22 9.2 Sampling strategy. 22 9.2.1 General . 22 9.2.2 Measurement section and measurement plane 22 9.2.3 Minimum number and
28、location of measurement points . 22 9.2.4 Measurement ports and working platform 22 9.3 Choice of the measuring system . 23 9.4 Setting of the measuring system on site 23 9.4.1 General . 23 9.4.2 Preliminary zero and span check, and adjustments . 23 9.4.3 Zero and span checks after measurement 24 DI
29、N EN 14792:2017-05 EN 14792:2017 (E) 3 10 Ongoing quality control 25 10.1 General . 25 10.2 Frequency of checks 25 11 Expression of results . 26 12 Equivalence of an alternative method 27 13 Measurement report . 27 Annex A (informative) Validation of the method in the field . 28 A.1 General . 28 A.2
30、 Characteristics of installations 28 A.3 Repeatability and reproducibility in the field 29 A.3.1 General . 29 A.3.2 Repeatability 30 A.3.3 Reproducibility 31 Annex B (informative) Sampling and conditioning configurations . 32 Annex C (normative) Determination of conversion efficiency . 33 C.1 Genera
31、l . 33 C.2 First method: cylinder gases for calibration . 33 C.3 Second method: gaseous phase titration . 33 Annex D (informative) Examples of different types of converters . 35 D.1 Quartz converter . 35 D.2 Low temperature converter (molybdenum) 35 D.3 Stainless steel converter 35 Annex E (informat
32、ive) Calculation of the uncertainty associated with a concentration expressed for dry gas and at an oxygen reference concentration 36 E.1 Uncertainty associated with a concentration expressed on dry gas 36 E.2 Uncertainty associated with a concentration expressed at a oxygen reference concentration
33、 38 Annex F (informative) Example of assessment of compliance of chemiluminescence method for NOxwith requirements on emission measurements 40 F.1 General . 40 F.2 Elements required for the uncertainty determinations . 40 F.2.1 Model equation 40 F.2.2 Combined uncertainty 41 F.2.3 Expanded uncertai
34、nty . 41 F.2.4 Determination of uncertainty contributions in case of rectangular distributions . 43 F.2.5 Determination of uncertainty contributions by use of sensitivity coefficients . 44 F.3 Example of an uncertainty calculation 44 F.3.1 Site specific conditions . 44 DIN EN 14792:2017-05 EN 14792:
35、2017 (E) 4 F.3.2 Performance characteristics of the method . 45 F.3.3 Calculation of concentration values 46 F.3.4 Determination of the uncertainty contributions 47 F.3.5 Result of uncertainty calculation . 50 F.3.5.1 Standard uncertainties 50 F.3.5.2 Combined uncertainty 51 F.3.5.3 Expanded uncerta
36、inty 52 F.3.5.4 Evaluation of the compliance with the required measurement quality 52 Annex G (informative) Example of correction of data from drift effect . 53 Annex H (informative) Significant technical changes 55 Bibliography . 56 DIN EN 14792:2017-05 EN 14792:2017 (E) 5 European foreword This do
37、cument (EN 14792:2017) has been prepared by Technical Committee CEN/TC 264 “Air quality”, the secretariat of which is held by DIN. This document supersedes EN 14792:2005. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorse
38、ment, at the latest by July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. 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
39、ny or all such patent rights. Annex H provides details of significant technical changes between this document and the previous edition. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Au
40、stria, 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, Serbia, Slovakia, Slovenia, Sp
41、ain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 14792:2017-05 EN 14792:2017 (E) 6 1 Scope This European Standard specifies the standard reference method (SRM) based on the chemiluminescence principle for the determination of the nitrogen oxides (NOx) in flue gases emitted to the atmo
42、sphere from ducts and stacks. It includes the sampling and the gas conditioning system, as well as the analyser. This European Standard specifies the characteristics to be determined and the performance criteria to be fulfilled by portable automated measuring systems (P-AMS) based on this measuremen
43、t method. It applies for periodic monitoring and for the calibration or control of automated measuring systems (AMS) permanently installed on a stack, for regulatory or other purposes. This European Standard specifies criteria for demonstration of equivalence of an alternative method to the SRM by a
44、pplication of EN 14793:2017. This European Standard has been validated during field tests on waste incineration, co-incineration and large combustion installations and on a recognized test-bench. It has been validated for sampling periods of 30 min in the range of 0 mg/m3to 1 300 mg/m3of NOxfor larg
45、e combustion plants and 0 mg/m3to 400 mg/m3of NOxfor waste incineration, according to emission limit values (ELV) laid down in the Directive 2010/75/EU. The ELV for NOx(NO + NO2) in EU Directives is expressed in mg/m3of NO2on a dry basis, at a specified value for oxygen and at standard conditions (2
46、73 K and 101,3 kPa). NOTE The characteristics of installations, the conditions during field tests and the values of repeatability and reproducibility in the field are given in Annex A. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document an
47、d 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 14793:2017, Stationary source emission Demonstration of equivalence of an alternative method wit
48、h a reference method EN 15259:2007, Air quality - Measurement of stationary source emissions - Requirements for measurement sections and sites and for the measurement objective, plan and report EN 15267-4:2017, Air quality Certification of automated measuring systems Part 4: Performance criteria and
49、 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 Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) DIN EN 14792:2017-05 EN 14792:2017 (E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NO
