NID循环半干法烟气脱硫装置脱硫效率的分析汪建慧

　　　201129NID循环半干法烟气脱硫装置脱硫效率的分析汪建慧(,　311800)　:从NID循环半干法烟气脱硫机理的基础上,推导了脱硫效率的表达式。并对主要影响因素(Ca/S,相对湿度)与脱硫效率的关系进行了回归分析,建立了数学模型,为NID循环半干法脱硫装置的设计、运行和脱硫效率的预测提供了依据。:半干法;脱硫效率;数学模型;回归分析REGRESSIVEANALYSISOFDESULFURIZATIONEFFICIENCYFORNIDCIRCULATEDHALFDRYFGDWangJianhui(ZhejiangfeidaEnvironmentalTechnologyCo.,Ltd,Zhuji311800,China)Abstract:BasedonthemechanismofNIDcirculatedhalfdryFGD,mathematicalmodelwasmadeandthere-gressiveanalysisofthemainfactorswasemphaticallyintroduced.Areferencewasgiventodesign,operationandtheforecastofthesystemdesulfurationefficiency.Keywords:halfdryprocess;desulfurizationefficiency;mathematicalmodel;regressiveanalysis0　,,SO2。SO2。,,,。,Ca(OH)2SO2[1]。Ca(OH)2SO2、HSO3-、SO32-、Ca2+、,,[2],Ca/S,(RH),,NID、。1　NID1。Ca(OH)2,,SO2Ca(OH)2,,。1　NIDSO2[3-5]:Ca(OH)2+SO2=CaSO3.1/2H2O+1/2H2O[6-7]。,,,,。,。,SO2,,SO2。:SO2/。,HSO3-、SO32、H+,Ca(OH)2,150DOI:10.13205/j.hjgc.2011.s1.068　　　201129。CaSO3,。,、[8]。,,,,,,,,SO2。,,。,,。,。[9-10]。2　:1)。2)。3),。4)SO2Ca(OH)2。5)。6),,。dz,2。(1):VdPA=RTdnA(1)PASO2,Pa;V,m3/s;R,J/K.mol;T,K;nASO2,mol。S,m2/m3;A,m2;dz,SO2n(2):dnA=-NASAdz(2)NASO2,mol/(m2·S)(1)(2)(3):VdPA/(RT)=-NASAdz(3)V=U.A(U,m/s),(4):UdPA/(RT)=-NASdz(4)2　SO2p=nvRT,ρm=nv,,RT=Pρm(4)(5)、(6):ρmUdPAP=-NASdz(5)ρmdPAPNA=-(dzU)S=-Sdt(6)SO2:[11-13],SO2(7):NA=kg(PA-Pi)(7)(4)SO2(8):NA=EklCi(8)(9):Ci=HPi(9):kgSO2,mol/(m2.Pa·s);klSO2,m/s;E。(7)、(8)、(9)(10):NA=PA1kg+1EHkl=KG×PA(10)(10):1KG=1kg+1EHKl(10)(6)(11):∫PAoutPAinρmPdPAKGPA=-∫tre0Sdt(11):PAin,PAoutSO2,Pa;tre,s。,SO2,(6),Pgas,“-”(12):ρmdPgasPFw=(dzU)S=Sdt(12)FW,mol/(m2·s);(13)FW=Kw(Pw-Pgas)(13)151　　　201129Kw,mol/(m2·s·Pa)PW,Pa;Pgas,Pa;(13)(12),(14):∫PgasoutPgasinρmPdPgasKw(Pw-Pgas)=∫tev0Sdt(14):Pgasin,Pgasout,Pa;tev,s。(6)tre=tev,(11)=-1×(14)(15):η=1-PAoutPAin=1-exp[EHklkg(EHkl+kg)Kw×ln(Pw-PgasoutPw-Pgasin)](15)3　,[14],,Ca/S,,。(15):E,Pgasout,H,kl,kg,Kw,Pw,Pgasin。H2O-SO2-Ca(OH)2ECa/S,,,Ca/S、(RH);:η=1-exp[f(RH,Ca/S)],Ca/S0.8～1.8,30%～45%,SO21500～4000mg/m3,120～160℃,5%～7.5%(V/V),:3.1　单元回归3.1.1　Ca/S-η:η=1-exp(1.309-2.666×x1)x1=Ca/S(mol/mol)r=99.95%3.1.2　RH-η:η=1-exp(1.8693-0.1004×x2)x2=RH(%)r=99.91%3.2　多元回归:η=1-exp(-0.948×x1-0.1699×x2+0.13946×x1～2+0.00184×x2～2-0.05×x1×x2+5.3),α=0.01,,。Ca/S=1.4,3。3　RH=40%,Ca/S4。4　Ca/S3,,。,,,SO2Ca(OH)2,,。4,1,,1,。,,,,E,;,,E,。34,,。4　1),NID(205)152　　　201129。:,,,,。,。(Lu10),,。,,。,,。,。,,。[1]Wissa,AEZ.PhosphogypsumDisposalandTheEnvironment[M/OL].Florida:ardaman&Associates,Inc.,2003.[2],.[J].,2011,29(2):91-95.[3]GeoreqAKennedy.ChemistryofGypsumPondSystems[M].Bar-tow:FloridaInstituteofPhosphateResearch,1992.[4],,,.[J].,2004,23(12):2096-2099.[5]GB18599-2001、[S].[6]CJJ113-2007[S].[7]SL31-2003[S].[8],.[J].,2005,24(20):3766-3770.[9]AQ2006-2005[S].[10]LinsleyRK,FranziniJB,FreybergDL,etal.WaterResourcesEngineering[M].McGraw-Hill,1991.　　100029　2　(010)64959710E-mail　[e-mail]2010-09-14(152),、。2)NID,,,,,。,。40%。3),1.4～1.5。[1],,,.[J].,2005,21(1):13-16.[2],,,.[J].,2008,24(1):8-10.[3],.NID[J].,2005(1):10-12.[4],,.[J].,2008,24(2):9-10.[5],,,.NID200MW[J].,2006(2):15-19.[6],,.[M].:,2001.[7],,.[M].:,1984.[8],,,.[J].,2001(1):33-36.[9]StoufferMR,YoonH,BurkeFP.AnInvestigationofthemecha-nismsoffluegasDesulfurizationbyin-ductdrysorbentinjection[J].IndEngChemRes,1989(28):20-27.[10],.[J].,2004(3):21-25.[11]JamesKN.Modelforfluegasdesulfurizationinacirculatingdryscrubber[J].AICHEJournal,1996,42(1):259-268.[12]GeraldHN.ModelingtheSO2slurrydropletreacton[J].AIChEJournal,1990,36(12):1865-1872.[13]ZhangJ,YamasakiK,JensenS.NIDTechnologyAdvanceFlueGasCleaning,whichSatisfiesTodays'sandFutureRegula-tioninChina;3rdCIPEConference,Hangzhou,China,2004:21-23.[14],,,.[J].,2002,20(6).35-39.　　311800　　E-mail　[e-mail]2010-10-18205