1、BRITISH STANDARD BS EN 12952-9:2002 Water-tube boilers and auxiliary installations Part 9: Requirements for firing systems for pulverized solid fuels for the boiler The European Standard EN 12952-9:2002 has the status of a British Standard ICS 27.040 BS EN 12952-9:2002 This British Standard, having
2、been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 7 January 2003 BSI 7 January 2003 ISBN 0 580 41072 2 National foreword This British Standard is the official English language
3、 version of EN 12952-9:2002. When reference to this European Standard has been published in the Official Journal (OJ) of the European Communities, compliance with it will confer a presumption of conformity with the essential requirements covered by the standard in respect of the Pressure Equipment D
4、irective. The UK participation in its preparation was entrusted to Technical Committee PVE/2, Water-tube boilers, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement
5、 international or European publications referred to in this document 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 no
6、t 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 confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European co
7、mmittee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 t
8、o 25 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN129529 December2002 ICS27.040 Englishversion Watertubeboilersandauxiliaryin
9、stallationsPart9: Requirementsforfiringsystemsforpulverizedsolidfuelsforthe boiler ChaudirestubesdeauetinstallationsauxiliairesPartie 9:Exigencespourlesquipementsdechauffepour combustiblespulverissdelachaudire WasserrohrkesselundAnlagenkomponentenTeil9: AnforderungenanStaubfeuerungsanlagenfrdenKesse
10、l ThisEuropeanStandardwasapprovedbyCENon4November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsm
11、aybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official ver
12、sions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHE
13、SKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN129529:2002EEN129529:2002(E) 2 Contents page Foreword3 1 Scope 4 1.1 Firingsystems 4 1.2 Fuels4 1.3 Operation 4 1.4 Boundaryofpulver
14、izingsystem 4 2 Normativereferences 4 3 Termsanddefinitions. .5 4 Fuelbunkerswithconveyingplant. .8 4.1 General8 4.2 Conveyingplant . 8 4.3 Coalbunkers 8 5 Pulverizingsystemandpulverizedfuelsystem . 9 5.1 General9 5.2 Coalfeeders 9 5.3 Mills .9 5.4 Pulverizedfuelbins .10 5.5 Pulverizedfuelsupplypipe
15、sandshutoffdevices 10 6 Explosionpreventionmeasuresforpulverizingsystemsandpulverizedfuelsystems11 6.1 General11 6.2 Plantsoperatedwithoutinertgasprotection .12 6.3 Plantsoperatedwithinertgasprotection. 12 7 Equipmentforairsupplyandfluegasdischarge . .13 7.1 Airsupply 13 7.2 Air/fuelratio 13 7.3 Flu
16、egasdischarge .14 8 Firingsystem . .14 8.1 General14 8.2 Burnersforpulverizedfuel . .14 8.3 Fluegasrecirculation .14 8.4 Modificationofthefiringsystemsetting . .15 8.5 Monitoringandcontrol .15 8.6 Electricalequipment .15 8.7 Safetyprecautions 16 9 Ashextractionplant .19 10 Operationandmaintenance 19
17、 10.1 General19 10.2 Operatingmanualandinstructions .19 AnnexA (informative) Operationalrequirementsforpermanentlysupervisedfiringsystemfor pulverizedfuel 21 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsor otherprovisionsofthePressureEquipmentDirective . 24 Bibli
18、ography 25EN129529:2002(E) 3 Foreword Thisdocument(EN129529:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC269“Shellandwatertube boilers”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJu
19、ne2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2003. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective97/23/EC1. ForrelationshipwithEUDirective97/23EC,seeinformativeAnnex
20、ZA,whichisanintegralpartofthisdocument. TheEuropeanStandardEN12952concerningwatertubeboilersandauxiliaryinstallationsconsistsofthefollowing parts: Part1: General Part2: Materialsforpressurepartsofboilersandaccessories Part3: Designandcalculationforpressureparts Part4: Inserviceboilerlifeexpectancyca
21、lculations Part5: Workmanshipandconstructionofpressurepartsoftheboiler Part6: Inspectionduringconstruction;documentationandmarkingofpressurepartsoftheboiler Part7: Requirementsforequipmentfortheboiler Part8: Requirementsforfiringsystemsforliquidandgaseousfuelsfortheboiler Part9: Requirementsforfirin
22、gsystemsforpulverizedsolidfuelsfortheboiler Part10: Requirementsforsafeguardsagainstexcessivepressure Part11: Requirementsforlimitingdevicesoftheboilerandaccessories Part12: Requirementsforfeedwaterandboilerwaterquality Part13: Requirementsforfluegascleaningsystems Part14: RequirementsforfluegasDENO
23、Xsystems Part15: Acceptancetests Part16: Requirementsforgrateandfluidizedbedfiringsystemsforsolidfuelsfortheboiler CR1295217, WatertubeboilersandauxiliaryinstallationsPart17:Guidelinefortheinvolvementofaninspec tionbodyindependentofthemanufacturer. Althoughthesepartsmaybeobtainedseparately,itshallbe
24、recognizedthatthepartsareinterdependent.Assuch, thedesignandmanufactureofwatertubeboilersrequirestheapplicationofmorethanonepartinorderforthere quirementsofthestandardtobesatisfactorilyfulfilled. NOTE Parts4and15arenotapplicableduringthedesign,constructionandinstallationstages. AnnexAofthisEuropeanS
25、tandardisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcoun triesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,
26、Spain,Swe den,SwitzerlandandtheUnitedKingdom.EN129529:2002(E) 4 1Scope 1.1 Firingsystems ThisEuropeanStandardappliestopulverizedfuelfiringsystemsofsteamboilersandhotwatergeneratorsand commencesatthefillingequipmentfortheboilerbunkersorforthepulverizedfuelstoragesystemandendsatthe ashextractionplant.
27、Formultifuelfiringsystemsusingseparateorcombinedburners,theserequirementsapplytothe pulverizedfuelfiringpartinvolved.Forotherfuelsorfiringsystemsusedincombination,otherrequirementsapplye.g. EN129528. 1.2Fuels Theserequirementscovertheuseofpulverizedfuelsoriginatingfromcoalrangingfromlowtohighvolatil
28、ematter content.Thisincludese.g.coke,anthracite,bituminouscoalorhardcoal,ligniteorbrowncoal,petrolcokeandoil shale. 1.3Operation Requirementsforoperationalequipmentapplyforsteamboilersandhotwatergeneratorswithpermanentsupervision byproperlytrainedpersons. Asfiringsystemsusingpulverizedfuelmaybedesig
29、nedeitherasdirectfiringorasindirectfiringsystems,operational requirementshavetobedifferentiated.AnnexAsummarizestheoperationalrequirementsforfiringsystemsincluding thepulverizingsystem. 1.4 Boundaryofpulverizingsystem Apulverizingsystemisboundedby: theoutletofthefuelbunkersfeedingthemill; theoutleto
30、ftheburnersfedfromthatmill; thepointsatwhichthehotairorfluegasandtemperingairorfluegasleavetheirmainsupplyductsincluding theprimaryairfanifassociatedindividuallywiththemill. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativ
31、ereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferred
32、toapplies(includingamendments). EN11271, ExplosiveatmospheresExplosionpreventionandprotectionPart1:Basicconceptsandmethod ology. EN129528, WatertubeboilersandauxiliaryinstallationsPart8:Requirementsforfiringsystemsforliquidand gaseousfuelsfortheboiler. prEN501561, Electricalequipmentforfurnacesandan
33、cillaryequipmentPart1:Requirementsforapplication designandinstallation.EN129529:2002(E) 5 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN129528andthefollowingapply. 3.1 backupfiringsystem separatefiringsystemtomaintainsafeignitionandstablecombustionofthepul
34、verizedfuel 3.2 burnergroup burnersoperatedinforcedunisonandcontrolledjointlyandtheburnerssuppliedbythesamemillorthesamepul verizedfuelfeeder 3.3 burnermanagementsystem burnermanagementsystemperformsapredeterminedsequenceofactionsandalwaysoperatesinconjunction withaflamemonitor.Itreactstosignalsfrom
35、controlandsafetydevices,givescontrolcommands,controlsthe startupsequence,supervisestheburneroperation,andcausescontrolledshutdownandlockout 3.4 carriergas transportmediumforpulverizedfuelthroughmill,classifier,andpulverizedfuellines.Itmayconsistofprimaryair and/orinertgas 3.5 clearing removalofaccum
36、ulationorsettlementofpulverizedfuelinthecaseofinsufficientpurgingofthepulverizingsystem 3.6 coalbunker bunkerforthestorageofrawcoalforanindividualmill 3.7 coalfeeder installationfortheextractionofcoalfromthecoalbunkerandthecontrolledfeedingofcoalintothemill 3.8 combustionair totalairsuppliedtothefir
37、ingsystemforcombustion 3.9 conveyingplant(Coalhandlingplant) installationforconveyinganddistributingrawcoaltotheindividualcoalbunkers 3.10 directfiringsystem systemwherethefuelisgroundanddriedinthemillandthenisfeddirectlytotheburners 3.11 explosion unintentionalinstantaneouscombustionphenomenonoccur
38、ringinaconfinedspacewithconsiderablepressure buildup NOTE Aweakexplosioniscalledpuffing. 3.12 explosionpressureresistantdesign installationsthataredimensionedsoastowithstandthemaximumexplosionpressurewithoutsubstainingperma nentdeformationEN129529:2002(E) 6 3.13 explosionpressureshockresistantdesign
39、 installationsthataredimensionedsoastowithstandthepressuresurgeoccurringduringanexplosionwithout rupturealthoughpermanentdeformationmayoccur 3.14 firingrateduringstartup firingrateofaburneroraburnergroupformingpartofapulverizingsystemofadirectfiredsystemduringstartup 3.15 firingsystem equipmentforth
40、ecombustionoffuels,includingtheinstallationsforthestorageintheboilerhouse,preparation andsupplyoffuels,thecombustionairsupply,theburner(s),thefluegasdischarge,andallrelatedcontroland monitoringdevices NOTE Afluegasrecirculationsystemcanbeinstalledasanintegralpartofthefiringsystem. 3.16 firingsystemh
41、eatinput heatinputintothecombustionchamber,normallycalculatedasthemassflowofthefuelsuppliedmultipliedbyits netcalorificvalue 3.17 flamemonitor devicethatdetectsthepresenceorabsenceoftheflameandtransmitsasignaltothecontroldevice Forapulverizedfuelfiringsystemtheflamecanbedefinedas: anindividualflameo
42、fasingleburner, theflameofaburnergroupforinstanceallburnersconnectedtoapulverizingsystem, theflameofallburnersinonecombustionchamber. 3.18 flameresistantmaterial flameresistantmaterialthatiscombustibleonlywhensubjectedtoacontinualsupplyofheatenergyandextin guishesuponremovaloftheignitionsource 3.19
43、fluegasrecirculation returnoffluegasfromdownstreamoftheflamezoneorfromthefluegasexit NOTE Thiscanbeachievedbypressuredifferenceortheuseofaseparatefanorfansintothepulverizingsystem,theair registeroftheburner,ordirectlyintothecombustionchamber. 3.20 implosion unintentionalinstantaneousnegativepressurebuildup NOTE Thiscanoccurasaconsequenceofanexplosioninaconfinedspace,byrapidclosingofdampers,orbyrapidreduc tionintemperature,e.g.flameout. 3.21 indirectfiringsystem systemwherethefuelthathasbeengroundanddriedinthemillisintermediatelystoredinbinsandthevapours areseparat
