1、BRITISH STANDARD BS EN 12953-12:2003 Shell boilers Part 12: Requirements for grate firing systems for solid fuels for the boiler The European Standard EN 12953-12:2003 has the status of a British Standard ICS 27.060.30; 27.100 BS EN 12953-12:2003 This British Standard, was published under the author
2、ity of the Standards Policy and Strategy Committee on 14 October 2003 BSI 14 October 2003 ISBN 0 580 42758 7 National foreword This British Standard is the official English language version of EN 12953-12:2003. When reference to this part of the European Standard has been published in the Official J
3、ournal of the European Communities (OJ), compliance with it will confer a presumption of conformity with the essential safety requirements of the Pressure Equipment Directive covered by this part of the standard. The UK participation in its preparation was entrusted to Technical Committee PVE/16, Sh
4、ell 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 international or European publications referred to in this document may be found in the BSI Catalogu
5、e 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. Users are responsible for its correc
6、t 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, and keep the UK interests infor
7、med; 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 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indi
8、cates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1295312 September2003 ICS27.060.30;27.100 Englishversion ShellboilersPart12:Requirementsforgratefiringsystemsfor solidfuelsfortheboiler Chaudirestubesde
9、fumePartie12:Exigencespour lesquipementsdechauffegrillepourcombustibles solidesdelachaudire GrowasserraumkesselTeil12:Anforderungenan RostfeuerungsanlagenfrfesteBrennstoffefrdenKessel ThisEuropeanStandardwasapprovedbyCENon12June2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhi
10、chstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English
11、,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hung
12、ary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyf
13、ormandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN1295312:2003EEN1295312:2003(E) 2 Contents Page Foreword3 1 Scope 4 1.1 Firingsystems 4 1.2 Fuels4 1.3 Operationalequipment. .4 2 Normativereferences 4 3 Termsanddefinitions. .5 4 Fuelbunkerswithconveyingplant. .6 4.1 General6 4.2 Conv
14、eyingplant . 7 4.3 Fuelbunkers .7 4.4 Fuelbins . 8 5 Fueltreatment 8 5.1 General8 5.2 Sizereductionofthefuel 8 5.3 Dryingofthefuel 8 6 Fuelfeeding 9 7 Explosionpreventionmeasures. 9 8 Equipmentforcombustionairsupplyandfluegasdischarge.10 8.1 Airsupply 10 8.2 Combustionair/fuelratio . .10 8.3 Fluegas
15、discharge 10 9 Firingsystem. .11 9.1 General11 9.2 Controlandmonitoring .11 9.3 Electricalequipment 11 9.4 Safetyprecautions .11 9.4.1 General11 9.4.2 Purgingofthefluegaspasses 12 9.4.3 Lightingup . 12 9.4.4 Startup .12 9.4.5 Shuttingdown . .13 9.5 Commonstackforseveralfiringsystems . .13 10 Ashhand
16、lingandextraction .13 11 Operationandmaintenance 14 11.1 General14 11.2 Operatinginstructions . .14 AnnexA (informative) Operationalrequirementsforpermanentlysupervisedfiringsystemsforsolid fuelsongratefiringsystems 15 AnnexZA (informative) RelationshipbetweenthisEuropeanStandardandtheEssentialRequi
17、rements ofEUDirective97/23/EC . 17 Bibliography 18EN1295312:2003(E) 3 Foreword ThisdocumentEN1295312:2003hasbeenpreparedbyTechnicalCommitteeCEN/TC269“Shellandwatertube boilers”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanident
18、icaltextor byendorsement,atthelatestby March2004 ,andconflictingnationalstandardsshallbewithdrawnatthelatestby March2004 . ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s)(PressureEquipmentDi
19、rective 97/23/EC)1. ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. TheEuropeanStandardEN12953concerningshellboilersconsistsofthefollowingParts: Part1: General Part2: Materialsforpressurepartsofboilersandaccessories Part3: Designandcalculationforpressurep
20、arts Part4: Workmanshipandconstructionofpressurepartsoftheboiler Part5: Inspectionduringconstruction,documentationandmarkingofpressurepartsoftheboiler Part6: Requirementsforequipmentfortheboiler Part7: Requirementsforfiringsystemsforliquidandgaseousfuelsfortheboilers Part8: Requirementsforsafeguards
21、againstexcessivepressure Part9: Requirementsforlimitingdevicesoftheboilerandaccessories Part10: Requirementsforfeedwaterandboilerwaterquality Part11: Acceptancetests Part12: Requirementsforgratefiringsystemsforsolidfuelsfortheboiler Part13: Operatinginstructions CR12953Part14: Guidelinefortheinvolve
22、mentofaninspectionbodyindependentofthemanufacturer(TR) AlthoughthesePartsmaybeobtainedseparately,itshouldberecognizedthatthePartsareinterdependent.Assuch, thedesignandmanufactureofshellboilersrequirestheapplicationofmorethanonePartinorderforthe requirementsoftheEuropeanStandardtobesatisfactorilyfulf
23、illed. TheannexAofthisEuropeanStandardisinformative. ThisdocumentincludesaBibliography. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,H
24、ungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN1295312:2003(E) 4 1Scope 1.1 Firingsystems ThispartofthisEuropeanStandardspecifiestherequirementsforinternalorexternalgratefiringsystems commencingatthefuelbunkersandendi
25、ngattheashextractionplant.Forcombinationofvariousfiringsystems, theindividualrequirementsofeachsystemalsoapply. Ifseveralfuelsareburntsimultaneouslyorifafuelqualityvariesconsiderably(e.g.moisturecontent),additional safetymeasurescanbenecessary,especiallywithrespecttolimitationofthefuelflowintothefir
26、ingsystemand ensuringproperairsupplytotheindividualfuels. 1.2Fuels Thesolidfuelscoveredare: allcoalqualities,e.g.ligniteorbrowncoal,subbituminousorhardbrowncoal,bituminouscoalorhardcoal, pitchcoal,anthracite,coke,coalculm,coalsludge; otherfossilsolidfuels(e.g.petrolcokepeat,oilshale); biomasssolidfu
27、els(e.g.wood,woodwastesbark,energyplantsmiscanthus,harvestwastesstraw); municipalwastesolidfuels(e.g.garbage,sewagesludge,refusederivedfuelsRDF); industrialwastesolidfuels(e.g.petrolcoke,soot,tyres,paperwastes,coatedwoodchips,spentwood,animal productwastes). Fuelblendsfromtwoormoreofthesegroups(see4
28、.1.7),orfuelsofunconventionalorunknownqualitycan requirespecialsafetymeasureswhichcanbeprovedeitherbypracticalexperiencegainedfromcomparablefuels, orbysuitabletests,e.g.inaccordancewithEN 261841.Suchmeasuresshouldbedocumentedbythe manufacturer. Fuelsonwhichthedesignisbasedshouldbe specifiedintheoper
29、atinginstructions(see11.2).Thisshouldinclude thefueldatafor100%inputofthebasicfuelandthedataforanysupplementaryfuelstogetherwiththeirmaximum thermalinputpercentage. 1.3 Operationalequipment Therequirementsforoperationalequipmentinclauses4to10applytosteamboilersandhotwatergeneratorswith permanentsupe
30、rvisionbyproperlytrainedpersonnelfamiliarwiththespecialconditionsofthefiringsystemsandthe typeoffuel. AnnexAcontainstheoperationalrequirementsforpermanentsupervision. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativerefere
31、ncesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoappli
32、es(includingamendments). EN129528:2002, WatertubeboilersandauxiliaryinstallationsPart8:Requirementsforfiringsystemsforliquid andgaseousfuelsfortheboiler. EN129529:2002, WatertubeboilersandauxiliaryinstallationsPart 9:Requirementsforfiringsystemsfor pulverizedsolidfuelsfortheboiler. EN129537, Shellbo
33、ilersPart7:Requirementsforfiringsystemsforliquidandgaseousfuelsfortheboiler.EN1295312:2003(E) 5 EN261841, ExplosionprotectionsystemsPart1:Determinationofexplosionindicesofcombustibledustsinair (ISO61841:1985). prEN501561, ElectricalequipmentforfurnacesandancillaryequipmentPart1:Requirementsforapplic
34、ation designandinstallation. 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 backupfiringsystem separatefiringsystemtomaintainsafeignitionandstablecombustion.Thelightingupequipmentcanbeusedfor thispurpose 3.2 basicfire layerofglowingfuel,firebedor
35、flameofthefedfuel.Thebasicfirecanalsoperformthedutyofthelightingup equipment,orthebackupfiringsystem(mostlyair) 3.3 carriergas transportmediumforpneumaticconveying 3.4 combustionair totalairsuppliedtothefiringsystemforcombustion 3.5 firingsystems canbedistinguishedinaccordancewiththetypeandstructure
36、ofthefuel,thefeedingprocedureandtheprocess ofcombustion.Fuelandaircanbeintroducedinthecombustionchamberindifferentwaystoestablishand maintainproperignitionandstablecombustion.Combustionofthefuelisperformedongrates 3.6 fuelbin silo dusttightcontainerfortemporarystorageofcombustiblesolidsintheboilerro
37、om 3.7 fuelbunker openstorageofsolidfuel 3.8 fuelfeedingsystem devicetotransportfuelintothecombustionchamber NOTE Thiscanbeeffecteddirectlybyfeedersthroughportsinthefurnacewalls,bymeansofchutesorthroughthe bottomgrate 3.9 fuelhandlingplant installationforconveying,mixinganddistributingsolidfuelstoth
38、eindividualfuelbunkersorfuelbins 3.10 gratefiringsystem fuelisburntinalayersupportedbyasystemoffirebarswhichmayhaveacoolingsystem NOTE Thefirebarsshouldbesospacedastoadmittheundergratecombustionairsupplyinproperdistribution.Other meansofadmittinganddistributingthecombustionairsupplycanbeprovided.EN1
39、295312:2003(E) 6 3.11 indicator measuringinstrumentwhichindicatesavariablevalue(e.g.pressure,temperature,flow,level).Itcanbeequipped withanannunciator 3.12 lightingupequipment facilitytoachievesafeignitionofthefeedfuel 3.13 limiter transducer,which,onreachingafixedlimitvalue(e.g.pressure,temperature
40、,flow,level)isusedtointerruptand lockouttheenergysupplyandItrequiresmanualunlockingbeforerestart 3.14 lockout interruptionoftheenergysupply.Manualunlockingisrequiredbeforerestart 3.15 masterfueltrip devicelocatedatasafeplaceforrapidautomaticshutoffofallfuelsuppliestothegrateandelectricalignitersinth
41、e eventofdanger 3.16 maximumcontinuousrating(MCR) allowableheatoutput steamboilerorhotwaterheatoutputthatcanbegeneratedduringcontinuousoperationandatwhichthesteamor hotwatergeneratormaybeoperated,takingthespecifiedsteamconditionorhotwatercondition(watermassflow timesthedifferencebetweenoutletandinle
42、tenthalpy)intoconsideration 3.17 monitor transducerthatsensesthereachingofafixedlimitvalueandinitiatesanalarmand/orashutdown.Theoutputsignal onlyreversesifthecausingvaluehaschangedatadefinedrange 3.18 purgingofthefluegaspasses flowofairthroughcombustionchamber,fluegaspasses,andassociatedductsincludi
43、ngfluegastreatmentsystems, whicheffectivelyremovesanygaseouscombustiblesandreplacethemwithair 3.19 startupcondition theplantcanbestarted cold(temperatureofceramicliningisatambientvalue); hot(temperatureofceramicliningisabovetheminimumignitiontemperatureofthebasicfuel);or warm(temperatureofceramiclininginbetweentheambientandminimumignitiontemperature) 4 Fuelbunkerswithconveyingplant 4.1General 4.1.1 Allfacilitiesshallbedesignedsoastowithstandmechanicalandthermalstresses.Fuelshallnotbeheated toanunacceptablelevel.Siteswherefuelmayaccumulateshall
