fossil fuel fired utility and industrial boilers

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1、SectionVI:Guidelines/guidancebysourcecategory:PartIIIofAnnexCFossilFuelFiredUtilityandIndustrialBoilersAmended13April2006ByChrisMobbs,AustraliaaccordingtodiscussionsinGenevaatEGin 2005andcommentssubmittedtotheStockholmSecretariat.SectionVI:Guidelines/guidancebysourcecategory:PartIIIofAnnexCTableofCo

2、ntentsFossilfuelfiredutilityandindustrialboilers31Summaryofdevicesandprocesses31.1Introductiontoboilers31.2Boilertypes42GenerationofPCDD/PCDF,PCBandHCBfromcombustion52.1PCDDandPCDF52.2PCBandHCB73Effectoffueltypesongenerationofemissions73.1Lightfueloilandnaturalgas73.2Heavyfueloil73.3Coal73.4Lignite7

3、3.5Co-firingwithotherfueltypes84Estimationofemissionsofpersistentorganicpollutantsfromboilers85Bestenvironmentalpractices96Bestavailabletechniques106.1Primarymeasures106.2Secondarymeasures:Airpollutioncontroldevices116.3Otherconsiderations117Achievableperformancelevels12References14Fossilfuelfiredut

4、ilityandindustrialboilersSummaryUtilityandindustrialboilersarefacilitiesdesignedtoburnfueltoheatwaterortoproducesteamforuseinelectricitygenerationorinindustrialprocesses.ThevolumetricconcentrationsofchemicalslistedinAnnexCoftheStockholmConventionintheemissionsfromfossilfuel-firedboilersaregenerallyv

5、erylow.However,thetotalmassemissionsfromtheboilersectormaybesignificantbecauseofthescaleoffossilfuelcombustion,intermsofbothtonnageanddistribution,forelectricitygenerationandheatorsteamproduction.MeasuresthatcanbetakentodecreasetheformationandreleaseofchemicalslistedinAnnexCinclude:maintenanceofeffi

6、cientcombustionconditionswithintheboilerandensuringsufficienttimeisavailabletoallowcompletecombustiontooccur;undertakingmeasurestoensurefuelisnotcontaminatedwithPCB,HCBorchlorine,andislowinothercomponentsknowntoactascatalystsintheformationofPCDDandPCDF;useofappropriategas-cleaningmethodstoloweremiss

7、ionsthatmaycontainentrainedpollutants;andappropriatestrategiesfordisposal,storageorongoinguseofcollectedash.Achievableperformancelevelsaresignificantlylowerthan0.1ngTEQ/Nm3.1Introduction1.1Overviewofb