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VOC李泽清(,350003) 针对目前国内VOC废气净化的现状,以吸附-冷凝回收原理为基础,采用集成了加热器和冷却器功能的新型吸附床及纤维活性炭,通过实验研究及实践应用,确定了纤维炭吸附-热力脱附-冷凝回收处理工艺。该工艺应用于高浓度、小风量的VOC废气处理,具有较好的经济效益和环境效益。 VOC 废气 回收 净化1 VOC(Volatileorganiccompounds,),、,、、,。-,,,VOC,。,。2 2.1 尾气状况,,18,2000m3h,16.6gNm3,(THF)23.6gNm3,、N2(N2),。2.2 工艺流程图(见图1)1 1—;2—(、);3—;4—;5—;6—;7—;8—。2.3 工艺流程说明,。,,,。,、,,。,,,,VOC,VOC。,VOC,,,。3 3.1 吸附、脱附性能参数确定,,,。,-,、。,2。2 -:3000×10-5,20℃,38 200310215DOI:10.13205/j.hjgc.2003.05.0130.1m。15min,40%,≤40℃,15min,90%,150℃。3.2 吸附床设计,、,、N2,VOC。,,,;,、,,,,,VOC。3.3 冷凝效率,VOC(),,VOC,。-5℃,≥90%,THF≥85%。、,、,40℃,-5～-10℃-5℃,VOC。4 ,1。5 (1):138()。(2)2(200d,24h)。1 、THFNm3·h-1g·Nm-3THFg·Nm-3kg·h-1THFkg·h-1%THF%3.26188717.425.229.638.090.180.06.13202516.323.828.837.787.278.28.8194316.823.428.235.486.477.910.11210715.922.629.135.886.977.2199016.623.628.936.787.678.32 (0.6kW·h)(3)32h24h3.6h2.5h48000a12000a358080a (3)10108t,136t,,135。162。(4)128t、163t。6 (1)VOC--,。(2),、,。(3)、、,、。(4)、。(5)(1×10-3)、(10000m3h)VOC,、VOC、、。(6),,VOC。1 ..:,2001.2 ..:,2001.3 .().:,2001.4 KohlAL,NielsenRB.GasPurification.Fifthed.Houston:GulfPublishingCo,1997.5.5 FouhyK.Chem.Eng,1992,99(12):41. 350003 (0591)78605882002-11-2839 200310215remarkableeffectivenessisobtainedduringitsuseinproduction.Thesafetyandbenefitarealsoraisedevidently.Keywords tailgasofyellowphosphorus,recoverysystemandsafetydesignPROCESSOFRECORERYANDPURIFICATIONOFWASTEGASCONTAIRINGVOCLiZeqing(38)…………………………………………………………………………………………………………………………………Abstract InviewofcurrentsituationofpurifyingtheVOCwastegasathome,basedonthetheoryofadsorption-condensationrecovery,byusingthenewadsorbentbedthatintegratesthefunctionsofheaterandcondenser,andfibredactivatedcarbon,afterexperimentationandpracticalapplication,aprocessoffibreactivatedcarbonadsorption-thermodynamicdesorbing-condensingrecoveryisestablished.ThisprocessisusedtotreatVOCwastegaswithhighconcentrationandsmallairquantity.Itcanprovidebettereconomicandenvironmentalbenefits.Keywords VOC,wastegas,recoveryandpurificationTHESTUDYOFPREPARATIONOFHIGH-PURITYANDULTRAFINEALUMINUMOXIDEFROMFLYASHFangRonglietal(40)……………………………………………………………………………………………………Abstract Ultrafinepowderofaluminumoxidewassuccessfullypreparedbyusingofflyash.ItalsopresentedtheprocessofUsingC2S(2CaO.SiO2)crystalphasetransferandself-powder,highefficientdisperser———carbonizemethodsforthepreparationofaluminumpowderfromflyash,andconfirmedtheoptimumprocessconditionofabstractingaluminumoxidefromflyash.Thishasopenedanewwayforthehighvalueusageofflyash.Keywords flyash,crystalphasetransfer,self-powderandaluminumoxidePRELIMINARYSTUDYONSELF-CALCININGTECHNIQUEOFCOAL-GANGUEBRICKSTOCONTROLCHROMERESIDUESKuangShaopingetal(43)……………………………………………………………Abstract Apreliminarystudyonself-calciningtechniqueofcoal-ganguebrickstocontrolchromeresiduesisconductedthroughcalciningtests.TheresultsshowthatcharcoalandheatwithinthecoalganguebrickscanmakeCr(Ⅵ)inchromeresiduesreducetoCr(Ⅲ)duringtheircalcining.Themethodforcontrollingchromeresiduesfeaturessimpletechnique,lowcost,completedetoxification,highstabilityandabrightfutureofapplication.Keywords chromeresidues,detoxificationefficiency,strengthlossandpollutioncontrolBRICKSMADEFROMNEUTRALIZATIONSLAGSWITHARSENICREMOVALBYLIMEANDFERRICSALTSWangXiaopingetal(46)………………………………………………………………………………………Abstract Thispaperintroducesthemechanismofneutralizationslagswitharsenicremovalbylimeandferricsalts,aswellasmethodsofinnocuousdisposal.ThebrickmakingfromtheneutralizationslagsisdonesuccessfullybythejointeffortsofJinlongCompanyandabrickmakingyardinviewofthefactthatalandisoccupiedwithhighercostandenvironmentalhazardsetcduringdisposaloftheslags.Keywords neutralizationslag,disposal,resourcerecoveryandbrickmakingTREATMENTANDRESOURCERECOVERYOFSPENTLEADBATTERY———ANEWPROCESSOFPRODUCINGYELLOWLEADANDREDLEADSongJianfeietal(48)……………………………………Abstract Researchonthenewprocessofrecoveryofleadandproducingyellowleadorredleadbyrecyclingwastelead-acidbatterywasproposedinthepaper,whichcanhavehigherreactionefficiencywithsomeoxidant.Meanwhile,theprocessneedslowconsumptionofrawmalerials,stableproductsandgoodquality,lowforceoflabor,goodeffectivenessofdustremoval.Redleadcontinuouscalcarandotherequipmentsareairtightinordertolightenthehazardofenvironmentalpollution,whichcansaveenergyandlowercost.Keywords wastelead-acidbattery,recoveryoflead,yellowlead,continuousoxidationandredleadTHEBESTTESTINGCONDITIONSOFDETERMININGCODCrINHIGHSALINITYWASTEWATERWITHTHEMETHODOFSEALDIGESTIONShiXianghongetal(51)……………………Abstract ThispaperpresentsthebesttestingconditionsofdeterminingCODCrinhighsalinitywastewaterwiththemethodofsealdigestionafterastudyoftestingfactors—timefordigestion,concentralionofoxidationagent,andproportionofcoveringagent,whichareverifiedbyusingstandardwatersampleandactualwatersample.Theresultsindicatesthatthebesttestingconditionsarethattimefordigenstionshouldbe30minutes,proportionofcoveringagentshouldbeHgSO4∶Cl-=10∶1,concentrationofoxidationagentshouldvarywithconcentrationofCODCr.It4ENVIRONMENTALENGINEERINGVol.21,No.5,October,2003