1、BRITISH STANDARDBS EN 14884:2005Air quality Stationary source emissions Determination of total mercury: automated measuring systemsThe European Standard EN 14884:2005 has the status of a British StandardICS 13.040.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g
2、54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14884:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 January 2006 BSI 26 January 2006ISBN 0 580 47719 3National
3、forewordThis British Standard is the official English language version of EN 14884:2005. The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subcommittee EH/2/1, Stationary source emissions, which has the responsibility to:A list of organizations repres
4、ented on this subcommittee can be obtained on request to its secretary.The UK, as a member of CEN, is obliged to publish EN 14884:2005 as a British Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK consistently voted against its approval
5、as a European Standard.Total-mercury monitors commonly include a conversion system to convert all gaseous oxidized mercury into the elemental form. The performance of some of these conversion systems can be less than ideal, for example, in sources with high concentrations of acid components (such as
6、 stacks with high SO2emissions). It is in the opinion of the UK committee that EN 14884:2005 does not provide sufficient practical guidance on how to deal with such problems. Therefore the UK recommends that EN 14884:2005 should be used in conjunction with the operator-manual for each Automated Meas
7、uring System (AMS) used. The user of EN 14884:2005 should obtain the necessary information from the AMS supplier to ensure a continuing, valid performance of the AMS in the specific stack conditions to which it is applied.As identified in the scope, EN 14884:2005 is not applicable as a stand-alone d
8、ocument and is to be used in conjunction with EN 14181. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developme
9、nts and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, page i, a blank page, the EN title page, pages 2 to 18, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issue
10、d.Amendments issued since publicationAmd. No. Date CommentsBS EN 14884:2005iCross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence I
11、ndex”, 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. Users are responsible for its correct application. Compliance with a British Standard does not of itself co
12、nfer immunity from legal obligations.blankEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14884December 2005ICS 13.040.40English VersionAir quality - Stationary source emissions - Determination of totalmercury: automated measuring systemsQualit de lair - Emissions de sources fixes -Dtermination de
13、 la concentration en mercure totale:systmes automatiques de mesureLuftbeschaffenheit - Emissionen aus stationren Quellen -Bestimmung der Gesamtquecksilber-Konzentration:Automatische MesseinrichtungenThis European Standard was approved by CEN on 28 November 2005.CEN members are bound to comply with t
14、he CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or
15、 to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language 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
16、.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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland
17、and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement 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 14884:20
18、05: EEN 14884:2005 (E) 2 Contents Page Foreword 3 Introduction4 1 Scope .5 2 Normative references .5 3 Terms and definitions.5 4 Principle.6 5 AMS performance criteria for QAL 1 .6 6 AMS location .7 7 Calibration and validation of the AMS (QAL2) 7 7.1 General 7 7.2 Calibration procedure.7 7.2.1 Para
19、llel measurements with SRM 7 7.2.2 Automatic recording of AMS output signals.8 7.3 Establishing the calibration function 8 8 Ongoing quality assurance during operation (QAL 3) .8 9 Annual surveillance test (AST) 8 Annex A (informative) Example of calculation of the calibration function and of the va
20、riability test .9 A.1 General 9 A.2 Data evaluation .9 A.2.1 General 9 A.2.2 Calculation of measured values of the SRM at standard conditions11 A.2.3 Calibration function 12 A.2.4 Calibrated values of AMS .13 A.2.5 Conversion of data to standard conditions 13 A.2.6 Valid calibration range14 A.2.7 Te
21、st of variability.15 Bibliography.18 EN 14884:2005 (E) 3 Foreword This European Standard (EN 14884:2005) 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 publ
22、ication of an identical text or by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at the latest by June 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this
23、 European Standard: Austria, Belgium, Cyprus, 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. EN 14884
24、:2005 (E) 4 Introduction This European Standard describes the quality assurance procedures related to Automated Measuring Systems (AMS) for the determination of total mercury in flue gas, in order to meet the uncertainty requirements on measured values given by regulations, national or other legisla
25、tion. This European Standard is only applicable in conjunction with the general document on quality assurance of AMS described in EN 14181, and provides indications, which are specific to measurements of total mercury. The calibration and validation of mercury AMS are performed by parallel measureme
26、nts with the reference manual method described in EN 13211. The calibration and validation of mercury AMS are performed by parallel measurements with the reference manual method described in EN 13211. The species of mercury (Hg0and Hg2+) and the physical occurrence (gaseous, in dust or in droplets)
27、can vary significantly depending on the type of process to be monitored. A total mercury AMS or a gaseous mercury AMS can be chosen. Whether or not a gaseous mercury AMS can fulfil the requirements for total mercury depends on the process and sampling location. EN 14884:2005 (E) 5 1 Scope This Europ
28、ean Standard specifies specific requirements on automated measuring systems (AMS) for monitoring of total mercury. It is derived from EN 14181, which is the general document on the quality assurance of AMS. It is only applicable in conjunction with EN 14181. This European Standard sets specific requ
29、irements for the quality assurance levels and annual surveillance test as specified in EN 14181, for mercury AMS used for proving that the mercury emissions from a source are compliant with emission limits between 0,03 mg/m3and 0,5 mg/m31)(standard conditions) in ducted gaseous streams. This Europea
30、n Standard is applicable by direct correlation with the standard reference method (SRM) described in EN 13211. This European Standard is primarily developed for emissions from waste incinerators. From a technical point of view, it may be applied to other processes, for which measurement at an emissi
31、on limit is required with defined uncertainty. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inclu
32、ding any amendments) applies. EN 13211:2001, Air quality Stationary source emissions Manual method of determination of the concentration of total mercury EN 14181:2004, Stationary source emissions Quality assurance of automated measuring systems EN ISO 14956, Air quality Evaluation of the suitabilit
33、y of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956:2002) EN ISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) 3 Terms and definitions For the purposes of this European Standard, the term
34、s and definitions given in EN 13211:2001 and EN 14181:2004 and the following apply. 3.1 automated measuring system (AMS) measuring system permanently installed on site for continuous monitoring of emissions NOTE 1 An AMS is a method, which is traceable to a reference method. NOTE 2 Apart from the an
35、alyser, an AMS includes facilities for taking samples (e.g. sample probe, sample gas lines, 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 re
36、quired for regular functional checks. 1)m3expressed as m3under dry conditions, normalized to 273 K and 101,3 kPa and 11,0 % (volume fraction) O2(unless otherwise stated). EN 14884:2005 (E) 6 NOTE 3 For the purpose of this European Standard, AMS means automated mercury measuring system. 3.2 emission
37、limit value limit value related to the uncertainty requirement NOTE For the EU directives 1 and 2 it is the daily emission value that relates to an uncertainty requirement. 3.3 standard conditions reference values for a dry gas at a pressure of 101,3 kPa and a temperature of 273 K 3.4 Standard Refer
38、ence Method (SRM) method described and standardised to define an air quality characteristic, temporarily installed on site for verification purposes 3.5 tsamplesample time period of the automated measurement system 3.6 tcycletime of the total measurement cycle of the monitor 4 Principle This Europea
39、n Standard is derived from the general standard on the quality assurance of AMS (EN 14181). It shall be applied in conjunction with that standard. This European Standard only deals with the specific aspects related to mercury monitoring. According to EN 14181, three different levels of quality assur
40、ance are defined, designated as Quality Assurance Levels (QAL). These levels cover the suitability of an AMS for its measuring task (QAL1), the validation of the AMS following its installation (QAL2), the control of the AMS during its ongoing operation on an industrial plant (QAL3). An annual Survei
41、llance Test (AST) is also defined. 5 AMS performance criteria for QAL 1 The performance of the AMS shall be assessed in a suitability test referred to as QAL1. Suitability tests for an AMS are usually carried out within the framework of certification or type approval procedures. The suitability test
42、 comprises a separate laboratory test and a three-month field test in a typical application. NOTE The requirements for values of performance characteristics will be specified in a European Standard on AMS certification. The manufacturer shall ensure that the delivered AMS has the same characteristic
43、s as the tested devices. It shall be proven by use of EN ISO 14956 that the total uncertainty of the measured results obtained by the AMS meets the specifications for uncertainty stated in the applicable regulations. This total uncertainty is calculated by summing all the relevant uncertainty compon
44、ents arising from the individual performance characteristics in an appropriate manner. The AMS suitability shall be evaluated for the plant specific conditions taking into account the anticipated variations of the physical environment and interferences. Cross sensitivities of interferents in the gas
45、 to be measured are to be checked alone and together with mercury and its compounds. If there is any interaction then a restricted use of an AMS at specific emission sources is possible. EN 14884:2005 (E) 7 6 AMS location The AMS shall be located in such a way that the gas sample, which is monitored
46、, has a representative content of total mercury. The location shall be chosen according to the manufacturer recommendations, and may depend on the AMS principle of detection. The AMS shall be located to ensure that there is minimum interference with the SRM and vice versa. The working platform(s) fo
47、r the AMS shall provide an easy and safe access to the AMS in order to allow frequent inspection and quality assurance procedure implementation. If the particulate mercury amounts to more than 2% of the total mercury the working platform for the SRM shall comply with the requirements of Annex A of E
48、N 13284-1:2001 related to the manual gravimetric method. 7 Calibration and validation of the AMS (QAL2) 7.1 General The AMS should be serviced just before the calibration according to the manufacturers recommendations. NOTE 1 It is recommended to include the service report as an appendix to the cali
49、bration report. The AMS shall be calibrated and validated in accordance with EN 14181. NOTE 2 Annex A shows an example of a calculation procedure according to QAL2. 7.2 Calibration procedure 7.2.1 Parallel measurements with SRM The Standard Reference Method (SRM) used shall be in accordance with EN 13211. The testing laboratory, which performs the SRM measurements, shall have an accredited quality assurance system according to EN ISO/IEC 17025 or shall be approved directly by the competent authority. Validation test performed during writing of EN 13211 prov
