1、BRITISH STANDARDBS EN 14792:2005Stationary source emissions Determination of mass concentration of nitrogen oxides (NOx) Reference method: ChemiluminescenceThe European Standard EN 14792:2005 has the status of a British StandardICS 13.040.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g5
2、4g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIBS EN 14792:2005This British Standard was published under the authority of
3、 the Standards Policy and Strategy Committee on 4 January 2006 BSI 4 January 2006ISBN 0 580 46990 5National forewordThis British Standard is the official English language version of EN 14792:2005.The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subco
4、mmittee EH/2/1, Stationary source emissions, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document
5、 may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. User
6、s are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change,
7、 and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 51 and a back cover.The BSI copyright notice displayed in this document i
8、ndicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14792November 2005ICS 13.040.40English VersionStationary source e
9、missions - Determination of massconcentration of nitrogen oxides (NOx) - Reference method:Chemiluminescencemissions de sources fixes - Dtermination de laconcentration massique en oxides dazote (NOx) - Mthodede rfrence: ChimuluminescenceEmissionen aus stationren Quellen - Bestimmung derMassenkonzentr
10、ation von Stickstoffoxiden (NOx) -Referenzverfahren : ChemilumineszenzThis European Standard was approved by CEN on 30 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national sta
11、ndard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other la
12、nguage made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Ge
13、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement
14、Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14792:2005: ELicensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 2 Contents Page Fore
15、word 4 1 Scope .5 2 Normative references .5 3 Terms and definitions.6 4 Principle.10 4.1 General 10 4.2 Measuring principle 10 5 Description of measuring equipment - Sampling and sample gas conditioning systems11 5.1 General 11 5.2 Sampling line components.12 5.2.1 Sampling line.12 5.2.2 Filter .12
16、5.2.3 Sample cooler (configuration 1) 12 5.2.4 Permeation drier (configuration 2).12 5.2.5 Dilution system (configuration 3) 13 5.2.6 Heated line and heated analyser (configuration 4).13 5.2.7 Sample pump 13 5.2.8 Secondary filter.13 5.2.9 Flow controller and flow meter 13 6 Analyser equipment14 6.1
17、 General 14 6.2 Converter.14 6.3 Ozone generator14 6.4 Reaction chamber.15 6.5 Optical filter.15 6.6 Photomultiplier tube .15 6.7 Ozone removal 15 7 Determination of the characteristics of the SRM: analyser, sampling and conditioning line.15 7.1 General 15 7.2 Relevant performance characteristics of
18、 the SRM and performance criteria 16 7.3 Establishment of the uncertainty budget17 8 Field operation 18 8.1 Sampling location .18 8.2 Sampling point(s)18 8.3 Choice of the measuring system .19 8.4 Setting of the SRM on site19 8.4.1 General 19 8.4.2 Preliminary zero and span check, and adjustments 20
19、 8.4.3 Zero and span checks after measurement20 9 Ongoing quality control21 9.1 General 21 9.2 Frequency of checks 21 10 Expression of results22 11 Evaluation of the method in the field.23 12 Equivalence with an alternative method .23 13 Test report .24 Licensed Copy: Wang Bin, na, Fri Mar 10 06:44:
20、38 GMT 2006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 3 Annex A (informative) Four different sampling and conditioning configurations.25 Annex B (normative) Determination of converter efficiency 26 B.1 General 26 B.2 First method : cylinder gases for calibration26 B.3 Second method : gaseous phas
21、e titration 26 Annex C (informative) Examples of different types of converters28 C.1 Quartz converter .28 C.2 Low temperature converter (molybdenum).28 C.3 Stainless steel converter28 Annex D (informative) Example of assessment of compliance of chemiluminescence method for NOxwith requirements on em
22、ission measurements29 D.1 General 29 D.2 Process of uncertainty estimation.29 D.2.1 Determination of the model equation29 D.2.2 Quantification of uncertainty components .29 D.2.3 Calculation of the combined uncertainty29 D.3 Specific conditions in the field 30 D.4 Performance characteristics of the
23、method .31 D.4.1 NO measurement 32 D.4.2 NOx measurement 38 D.4.3 Results of standard uncertainties calculation40 D.4.4 Calculation of combined uncertainties .42 D.5 Conversion of the concentrations in mg/m3.42 D.5.1 No measurement.43 D.5.2 NO2measurement.43 D.5.3 NOxmeasurement .43 D.5.4 Combined u
24、ncertainty 43 D.5.5 Overall uncertainty43 D.6 Evaluation of the compliance with the required measurement quality.43 Annex E (informative) Procedure of correction of data from drift effect45 Annex F (informative) Evaluation of the method in the field.46 F.1 General 46 F.2 Characteristics of installat
25、ions46 F.3 Repeatability and reproducibility in the field47 F.3.1 General 47 F.3.2 Repeatability48 F.3.3 Reproducibility49 Annex ZA (informative) Relationship with EU Directives50 Bibliography.51 Licensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 4
26、 Foreword This European Standard (EN 14792:2005) has been prepared by Technical Committee CEN/TC 264 “Air Quality”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the l
27、atest by May 2006, and conflicting national standards shall be withdrawn at the latest by May 2006. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For re
28、lationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus,
29、Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2
30、006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 5 1 Scope This European Standard describes the chemiluminescence method, including the sampling and the gas conditioning system, to determine the NO/NO2/NOxconcentrations in flue gases emitted from ducts and stacks to atmosphere. This European Standar
31、d is the Standard Reference Method (SRM) for periodic monitoring and for calibration or control of Automatic Measuring Systems (AMS) permanently installed on a stack, for regulatory or other purposes such as calibration. To be used as the SRM, the user shall demonstrate that the performance characte
32、ristics of the method are better than the performance criteria defined in this European Standard and that the overall uncertainty of the method is less than 10 % relative at the daily Emission Limit Value (ELV). NOTE When the chemiluminescence method is the measurement principle used for AMS, refere
33、nce should be made to EN 14181 and other relevant standards provided by CEN TC 264. An Alternative Method to this SRM may be used provided that the user can demonstrate equivalence according to the Technical Specification CEN TS 14793, to the satisfaction of his national accreditation body or law. T
34、his SRM has been evaluated during field tests on waste incineration, co-incineration and large combustion installations. It has been validated for sampling periods of 30 min in the range of 0 mg NO2/m3to 1 300 mg NO2/m3for large combustion plants and 0 mg NO2/m3to 400 mg NO2/m3for waste incineration
35、, according to emission limit values (ELVs) laid down in the following Council Directives: Council Directive 2001/80/EC on the limitation of emissions of certain pollutants into the air from large combustion plants; Council Directive 2000/76/EC on waste incineration plants. The ELVs for NOx(NO + NO2
36、) in EU directives are expressed in mg NO2/m3, on dry basis, at a reference value for O2and at the reference conditions (273 K and 101,3 kPa). 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edi
37、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ENV 13005, Guide to the expression of uncertainty in measurement. EN 14790:2003, Stationary source emissions - Determination of the water vapour in ducts. CEN/TS 14793, Stati
38、onary source emissions - Intralaboratory validation procedure for an alternative method compared to a reference method. EN ISO 14956, Air quality - Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956:2002). Licensed Copy: Wang Bin
39、, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 6 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. NOTE In this European Standard, NOxis defined as the sum of NO and NO2. The mass concentration of NOxis exp
40、ressed as the equivalent NO2concentration in milligrams per cubic metre at normal conditions. 3.1 adjustment (of a measuring system) operation of bringing a measuring system into a state of performance suitable for its use VIM 4.30 3.2 ambient temperature temperature of the air around the measuring
41、system 3.3 automatic measuring system (AMS) measuring system permanently installed on site for continuous monitoring of emissions NOTE 1 An AM is a method which is traceable to a reference method. NOTE 2 Apart from the analyser, an AMS includes facilities for taking samples (e.g. probe, sample gas l
42、ines, flow meters, regulators, delivery pumps) and for sample conditioning (e.g. dust filter, moisture removal devices, converters, diluters). This definition also includes testing and adjusting devices, that are required for regular functional checks. EN 14181 3.4 calibration statistical relationsh
43、ip between values of the measurand indicated by the measuring system (AMS) and the corresponding values given by the standard reference method (SRM) used during the same period of time and giving a representative measurement on the same sampling plane NOTE The result of calibration permits to establ
44、ish the relationship between the values of the SRM and the AMS (calibration function). 3.5 converter efficiency percentage of NO2present in the sample gas converted to NO by the converter 3.6 drift difference between two zero (zero drift) or span readings (span drift) at the beginning and at the end
45、 of a measuring period 3.7 emission limit value (ELV) emission limit value according to EU Directives on the basis of 30 min, 1 hour or 1 day Licensed Copy: Wang Bin, na, Fri Mar 10 06:44:38 GMT 2006, Uncontrolled Copy, (c) BSIEN 14792:2005 (E) 7 3.8 influence quantity quantity that is not the measu
46、rand but that affects the result of the measurement adapted VIM 2.7 NOTE Examples: ambient temperature; atmospheric pressure; presence of interfering gases in the flue gas matrix; pressure of the gas sample. 3.9 interference negative or positive effect upon the response of the measuring system, due
47、to a component of the sample that is not the measurand 3.10 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 accept
48、ed value of such test gases NOTE 1 Lack of fit may be a function of the measurement result. NOTE 2 The expression “lack of fit” is often replaced in everyday language by “linearity“ or “deviation from linearity“. 3.11 measurand particular quantity subject to measurement VIM 2.6 3.12 measuring system
49、 complete set of measuring instruments and other equipment assembled to carry out specified measurements VIM 4.5 3.13 performance characteristic one of the quantities (described by values, tolerances, range) assigned to equipment in order to define its performance 3.14 repeatability in the laboratory closeness of the agreement between the results of successive measurements of the same measurand carried out under the same conditions of measurement NOTE 1 Repeatability conditions include: same measurement procedure; same laboratory; same measu
