吴泾第二发电厂脱硫改造的工程研究

上海交通大学硕士学位论文吴泾第二发电厂脱硫改造的工程研究姓名：沈琦申请学位级别：硕士专业：动力工程指导教师：范浩杰;郭进2008030175%SO2SO2600MWABSTRACTChinaisthebiggestcoalconsumerintheworld.CoaltakesthemajorpositioninChineseenergystructureand75%primaryenergyinputiscoalinChina.Coalcombustionmakesmillionstonesofsulfurdioxideemissioneveryyear,whichformsacidrainandcausesserioussulfurdioxidepollution.Themainmethodtoreducesulfuremissionistoadoptdesulphurizationtechnologytodecreasesulfurcontentinpowerplantexhaust.ThisstudyfocusesonthedesulphurizationtechnologyapplyingonfluegasintheWuJingSecondPowerPlant,andsummarizestheadvantageandthedisadvantageofthedesulphurizationtechnicsurveyabroadanddomestic,thenitproposethedesulphurizationprojectoftheWuJingSecondPowerPlant.onthebasisoftheintroducingtheproject,itstudyandanalyzestwoimportantissueofthelimestone-gypsumwetdesulphurizationmethod----GGHboostsystem.Attheend,theauthorexploretheperformanceofthedesulphurizationsystem.Theconclusionoftheengineeringstudyisthatthelimestone-gypsumwetdesulphurizationmethodwhichgetstheadvantangeofthehighdesulphurizationefficiencyandthereliabilityissuitablefortheWuJingSecondPowerPlant;ThereismuchadvantagesanddisadvantagestoinstalltheGGH,Consideringthesystemreliabilityandeconomy,notinstallingtheGGHintheprojectisthebetterchoice;Byanalyzingthesettingoftheboostsystemandtheselectionoftheboostfan,theprojectsetupamovablevanetunablenessaxial-flowfaninthemiddleofthesuctionventilatorandtheabsorptiontower;Finally,theauthoranalyzesthetrialrunofthedesulphurizationsystemandthecommonsystem,providestheproperreferenceparameterandthedirectiveopinionfortherecoveryprocessing.Thepowerplantwhichhavingthedesulfurizationprojectcangetthereferentialexperiencefromtheconclusionofthearticle.KEYWORDS:600MW,desulphurization,engineeringresearch20086252008625200862511.1SO231SO2SO21SO2SO2H2SSO2SO2SO2SO2SO21500mg/m3SO2SO3SO3SO3H2O+H2SSO2SO2SO2SO2SO270SO21SO219801500/2080SO219972346/20001995/2025SO21983-19931010019958SO21SO21995201020001SO22SO223SO2420101SO220002SO23pH4.51998(1998-2002)[1]1Fig1TwoControlfieldpH4.51.2120002.461,20060%320053180060%200019952010200010%2%1%-2%200520102%8.5%1%-2%32.4%200520007%[2]1SO2200020032005(/)()6/12.59/16.310/18SO2(/)(1,200/19951316/21581800/3000(2.42.93(1,40020001.32003GB132232003NOxSO21996123111997112200411253230.5[3]2mgm-312320051120101120051120101120041121001200210012004001200400800120010.512550kJ·kg-140.52201511400mg/m312550kJ/kg800mg/m31.4197080“”“CAAA1979”1990“”CAAA199090FlueGasDesulphurization,FGDFGD/75%SO2FGD20701978FGD197319903.57.3107%SO22890212027%80%/FGD(EPA)FGD207070FGD1983FGD198319897SO26.890%FGD/75%FGDSDALIFACNIDDCFB2070FGD5SO2“”“”20SO2FGDFGD/FGDFGDFGD[4]62.1[1]lSO22l22.2,,(EBA)(PPCP)2.2.1(SDA)SDAJOYNIRO2SO2SO2120160SO26080107(1)22()CaOHOCaOH+→(2)SO22223SOHOHSO+→(3)23232()2HSOCaOHCaSOHO+→+(4)CaSO33241()()2CaSOaqOCaSOaq+→(5)3344()()()()CaSOaqCaSOsCaSOaqCaSOs→→1234562Fig2SDAsystem2.2.2(LIFAC)3LIFACIVOTAMPELLA,20%~30%LIFAC70%~75%LIFACLIFAC3080LIFACLIFAC300MWLIFAC83222422223212()()CaCOCaOCOCaOSOOCaSOCaOHOCaOHCaOHSOCaSOHO→+++→+→+→+3Fig3LIFACsystem2.2.3(CFBFGD)20804SO2SO3CaSO4CaSO3Ca/S1~1.590%~97%[[2]91CFB234564Fig4CFB-FGDsystem2.2.4(EBA)123456789105Fig5EBAsystem5SO2NOx90%80%10(1)2222232,,,,,()OHOeOHHHOOeOOMOMMN++→++→+(2)NOx:22222323322323NOONONOHONOOHNOOHHNONOOHHNOHNOOHNOONOONOHNOOHNO+→+→++→+→+→++→+→23222325252322HNOHNONOHONONONONOHOHNO+→++→+→SO2:2323324224243()SOOHHSOSOOSOHSOOHHSOSOOMSOMNSOeSO+++→+→+→++→+→(3)24342433432()HSONHNHSOHNONHNHNO+→+→2.3,Ca/S=190%[4]112.3.16NaOHNa2CO3NaHCO3Na2SO3SO2SO2SO223223222322NaCOSONaSOCONaOHSONaSOHO+→++→+223232()2CaOHNaSOHONaOHCaSOHO++→+⋅22322421()2222CaOHNaSOOHONaOHCaSOHO+++→+⋅12345678Na2CO391011126Fig6Two-sodaprocess2.3.2MgOMnO2CuOZnOSO2SO2SO2,790%1222323223232242324()()()()221()2MgOHSOMgSOHOMgSOSOHOMgHSOMgHSOMgOHMgSOHOMgSOOMgSO+→+++→+→++→3242212MgSOMgOSOMgSOCMgOSOCO→++→++7Fig7Magnesiaprocess2.3.38SO2,0.2~0.6mm133224332242342322432()()2NHHOSONHHSONHHOSONHSONHSOHOSONHHSO++++++ƒƒƒ8Fig8Ammoniaprocessofdesulfurization2.3.4,9SO2SO2SO2pHSO2SO2SO42-901.5222241()22SOgHOOSOH−+++→+14123SO245679BechtelFig9Seawaterprocessofdesulfurization2.3.5()-()-:95%Ca/S1.05-1.10FGD4095%90%FGD15SHU-CT121-CT121[5]162.43/80%95%80-90%75%75%/Ca/S1.11.3-1.42/172.5(1)100MW(2)75%(3)(4)-183.117km4600MW2600MW2600MW#1#22600MW20002001FGDGGH#1#1/#2//100%BMCR[7]1910Fig10WuJingsecondpowerplantdesulfurizationsystem203.23.2.1(N600-16.7/537/537)(SG2008/17.47-M903)(QFSN-600-2)[7]41#\2#600MW(BMCR)t/h2008(BMCR)MPa.g17.5(BMCR)541(BMCR)t/h1649(BMCR)MPa.g3.83(BMCR)MPa.g3.63(BMCR)327(BMCR)541(BMCR)126(BMCR)t/h232249299.382mg/Nm3151mg/Nm3(BMCR)2Nm3/s299(BMCR)Pa3685kW3150/()M240/63.2.2FGD215FGDBMCRCO2Vol%13.02213.049O2Vol%5.0665.09N2Vol%74.01674.701SO2Vol%0.0430.066H2OVol%7.8537.094553.8BMCRFGDNm3/s212.335%BMCR576.4123BMCRFGD8235%BMCR123125131180Pa03.2.36CaOMgOSiO2Al2O3FeO3()50.112.832.961.120.5942.393.2.471pH8.98.18.52(us/cm)268914251793.73(NTU)34.44.517.54Cl-(mg/L)378186.8249.35(mg/L)0.90.40.56(mg/L)3.21.92.47(mg/L)575275425.68(mg/L)186841319(mg/L)6.23.34.710(/mL)104102103223.310Fig10Absorptiontower123[8]SO