石油焦基本知识汇总(英文术语).doc

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1、PetroleumCokeGlossaryAAnodegradecokeAgradeofpetcokefromadelayedcoker(seesame)lowinmetalssuchasvanadium,nickelandironthatissuitableformakinggraphiteanodesforthealuminumsmeltingindustry.Ifthemetalscontentdoesnotqualifyasanodegradecoke,thenthecokeisgenerallyknown

2、asfuelgrade(seesame).Thechoiceofwhetheracokemayqualifyasanodeorfuelgradeisdrivensolelybythecrudeslateofthecrudeunitupstreamofthecokerandthemetalscontainedtherein.Generallypresenceofanyshotcoke(seesame)andVolatility(seesame)>10%areunacceptable.Sometimesanodegra

3、deisalsoreferredtoascalcineablecoke(seesame)AAshTheresidueremainingwhenallofthecokeisburnedoff.Itismostlymetalsandsilica.B  CCalcineablecokePetroleumcokethatqualifiestobecalcined,i.e.,generallynonshotandlowinmetalsthatwillqualifyforanodegrade.Calcineablecokeis

4、generallyreferredtoastheavailablesupplytocalciners.Alsoknownasgreencoke(seesame).CCalcinedcokePetroleumcokeorgreencoke(seesame)thathasbeenprocessedinacalciner(seesame)CCalcinerAlargerotarykiln(similartoacementkiln)thatdrivesoffthemoistureandvolatilityofgreenor

5、calcineablecoke(seeeach)sothatthecokecanbeusedforaluminumanodes,ortitaniumdioxideapplications.Thekilnreceivesthecokeatthehigherendwherethecokeflowsdownhillasthekilnrotates.Atthesametimeheatedaircounterflowsuphillfromthelowerend,drivingoffthemoistureandvolatile

6、materialCCarbonrejectionCrudeoilcontainsawidevarietyofhydrocarbonmolecules,rangingfromasinglecarbonatom(methane)toverylongchainmolecules.Thelightermoleculesthatmakeupgasoline,jetanddieselcontainalowerratioofcarbontohydrogenthantheheaviermolecules.Inordertoconv

7、erttheheaviermoleculestolighterproducts,theheaviermoleculesmustnotonlybecracked,buttheexcesscarbonmustberemovedtoreducethecarbontohydrogenratioofthecrackedmaterial. CirculatingFluidizedBed(CFB)BoilerAtypeofboilerwherethesolidfuelisfluidizedinaverticalfurnace.T

8、headvantageforthepetcokeindustryisthat100%veryhighsulfurcokecanbeburned.Thesulfurisremovedbyadditionoflimestoneinthebedwhichformsaneasilyremovablecalciumsulfateash.CCokerArefineryp