光催化氧化法治理恶臭污染的工程应用洪伟

洪　伟　古国榜　吴志伟(,510641)　　胡毅刚(,201108)　应用光催化氧化法对50000m3h饲料生产废气进行恶臭污染治理,具有工程投资少、运行费用省、废气停留时间短、高效稳定、反应彻底且无二次污染等特点。工程结果表明光催化氧化法对废气的预处理要求较高,除此之外运行效果还受到催化剂的固定方式的影响。在此指出如何更大程度增加催化剂的比表面积、提高其吸附作用和吸光效率从而增加催化活性,也是今后需研究的内容。　光催化氧化　紫外光　纳米TiO2　恶臭1　,、、。1988,,。,,、、、、、,。2　2.1　饲料生产工艺简介,:、、、,。1　,,。,、、,,,,,。,,,:(),。,。,、、、、。、、、、、、,、、、、。2.2　污染源排放状况及治理要求:Q=50000m3h,t=40～50℃,90%～100%,200～500mgm3,=5495(),15m,1.75。《》(GB14554-93),15m,2000(),。2.3　治理工艺流程,。,;。2。2　40　　　200212206DOI:10.13205/j.hjgc.2002.06.0122.4　光催化降解有机物的原理,(VB)(CB),,,,,(E-)-(h+)。,。,,,。,TiO2H2OOH-·OH,:H2O+h+※·OH+H+OH-+h+※·OH·OH,,,CO2。2.4.1　·OH,、,,:R-CH2CH3※R-CH2CH2OH※RCH2CHO※RCH2COOH※R-CH3+CO2※RCH2OH※RCHO※R-COOH,CO2,,CO2。2.4.2　·OHH+,,,,CO2。、、、,、、、。,TiO2,,,,100nmTiO2TiO2,,,,TiO2TiO2、、、,TiO2。3　3.1　布袋除尘器,,,、,。,2mmin,1200～1500Pa,,,,。3.2　风机4-68-6.3C3,N=15kW,Q=11476～20359m3h,2560～1790Pa。,。3.3　稳流室,,3ms。3.4　光催化氧化装置,1.5ms,1.73s。TiO2,16kW,20Pa。3.5　吸附室、,。1.5ms34Pa,250Pa。4　-,。　-mg·m-3200～5005～105～10120()549519255962000　　,,,,,65%;41　　　20021220669%,90%,。5　114,55,50,9。,(、、、),0.00106m3,14,34,。6　(1),、、、、、,、、。(2),,。(3),,,TiO2,,、,。1　LinsebiglerAL,GuangquanL,YateJT,“jphotocatalysisonTiO2surfaces:principles,mechanisms,anddelectedresults”,ChemRev,1995.95:735～75.2　HoffmannMR,MartinST,WonyongCetal,“environmentalapplicationsofsemiconductorphotocatalysis”,ChemRev,1995.95:69～96.3　..,2001.85.　,,196610,。1987,、,。2002-04-0242　　　200212206next.SO2concentrationinfluegasofdesulfurizationtowerinlet,fluegasamount,andfluegastemperatureofdesulfurizationtowerinlethavedifferenteffectsontheperformanceofsemi-dryprocessfluegasdesulfurization.Keywords　operatingparamenter,semi-dryprocessandfluegasdesulfurizationENGINEERINGAPPLICATIONOFTREATINGODORPOLLUTIONBYPHOTOCATALYTICOXIDATIONPROCESSHongWeietal(40)…………………………………………………………………………………Abstract　Aphotocatalyticoxidationprocessisadoptedtotreattheodorpollutionoffodder-producingwastegas(50,000m3h).Thisprocessfeatureslessinvestment,lowrunningcost,shorttimeofwastegasresidence,high-efficiencyandstabilityaswellaswithoutsecondarypollutionetc.Theengineeringresultshowsthattheprocesshashighdemandsonthepreteatmentofthewastegas,andthattherunningresultisalsoaffectedbythefixingmodeofacatalyst.Whatneedsfurtherresearchishowtoenlargethespecificsurfaceareaofthecatalyst,increaseitsadsorptionandabsorptivity,thusraisetheactivityofcatalysts.Keywords　photocatalyticoxidation,ultraviolet,nano-TiO2andodorSYNTHETICCONTROLINGOFNOINEOFLARGESCALECOOLINGTOWERXuDelin(43)……Abstract　TheoperationofalargescaleCoolingtowerhasspecialenvironmentrequirements,butitisverydifficulttocontrolthenoise.ThisarticletakesthecontrolingofthenoiseofthelargescalecoolingtowerforachemicalenterpriseinNantongasanexample.Theposition,structure,mechanismandcharacteristicsofthetowerarediscussed,andacompletesetofapplicablecontrolingmeasuresarealsodescribed.Theresultindicatesthattheschemeisstrict,thestructureiscompactandthecostislowandtheeffectofnoisereductionisevident.Thetechnologyissuitabletothesimilartypesofnoisecontsolings.Keywords　noiseofcoolingtower,waterproofmufflerandspecialsound-proofscreen.RECONSTURCTIONPROJECTOFNOISESUPPRESSIONCONTROLOFDIESELGENERATORChenHengetal(45)………………………………………………………………………………………………Abstract　Areconstructionprojectofhowtocontrolthenoiseofahighpowerdieselgenerator,whichemitsinanarrowengineroomisintroduced,includingremakingtheoriginalengineroom,addingsoudproofmaterialofnoiseabsorbent,installingmoreventilationdevicesetc.Finallythenoisefromthegeneratorcanbelowereddowntoanormallevel.Keywords　dieselgenerator,noiselevelanddB(A)NOISECONTROLOFAUTOMATICPRODUCTIONLINEOFBUILDINGBLOCKSZhouZhaojuetal(47)…………………………………………………………………………………………………………………………………Abstract　Inordertocontrolnoisepollutionofautomaticproducingblockslinewhichismadeinforeigncountry,thesemeasures,suchastoarrangeplanepositionofworkshoprationally,todesignitsenclosurestructurerightly,andtoenclosetheshaperwhichisthemainnoisesourceinnoise-isolatinghoodwereused.Becausethedesignofnoisecontrolwentthroughthewholeconstructiveprocess,soitensuredthattheenvironmentalnoisenotonlycouldmeetthestandard,butitsexpenseswerereduced.Keywords　noisecontrol,pulverisedflyash,buildingblock,architecturaldesignandnoise-isolatinghoodRESEARCHONAPPLICATIONOFFLYASHINAEROBICLANDFILLOFMUNICIPALSOLIDWASTELiBingetal(49)……………………………………………………………………………………………………………Abstract　Thispaperdiscussestheapplicationoftheflyashinaerobiclandfillofmunicipalsoildwaste(MSW)basedonthetheoryandexperiment.TheflyashhasbetterabsorbabilityandabilityofregulatingpH.WhenitismixedwithMSWtoaproperproportion,itcanmakeupthedefectoftheaerobiclandfilling,soastodegradeMSWmoreeffectively,especiallyindegradingleachate.Keywords　flyash,aerobiclandfilling,degradationandleachateANEWPROCEDUREOFUSINGMUNICIAPLSOLIDORGANICWASTESXieLipingetal(52)……4ENVIRONMENTALENINEERINGVol.20,No.6,December,2002