粗媒体颗粒流化床半干法烟气脱硫

72Vol.7,No.220062TechniquesandEquipmentforEnvironmentalPollutionControlFeb.200611213(1.,110142;2.,110026),,,,,:,;Ca/S,122mm,15182850h-11.01.164m,90%X70113A100829241(2006)0220057205FluegasdesulfurizationbyasemidryprocesswithcoarseparticlefluidizedbedZhangLi1MaHongbin1MaZhiyu2LiuYunyi1(1.DepartmentofChemicalEngineering,ShenyangInstituteofChemicalTechnology,Shenyang110142;(2.ShenyangGasHeatResearchandDesignInstituteofConstructionMinistry,Shenyang110026)AbstractAnewtypeoffluegasdesulfurizationtechnology,removalofSO2fromfluegasbyasemidryprocessincoarseparticlefluidizedbed(CPFB),wasdeveloped.Inthisprocesscoarseparticleswereaddedintoafluidizedbedinwhichthedesulfurizationabsorbentparticleswerepromotedtocontactwithfluegasbythecoarseparticles.Accordingly,thereactionbetweentheabsorbentandSO2wasimproved,andhighdesulfuriza2tionefficiencycanbeobtained.Intheexperiments,limestoneslurrywasusedasthedesulfurizationabsorbent.Theeffectsofthestaticheightofthecoarseparticlesinthebedandotheroperationconditionsondesulfurizationefficiencywereinvestigated.Experimentalresultsshowedthat:desulfurizationefficiencyincreaseswiththein2creasingoftheheightofcoarseparticlesinthebed,themolarratioofCatoSandtheinletconcentrationofSO2increasing,andwiththedecreasingofthediameterofthecoarseparticles,thespacevelocityofsimulatedfluegasandtheapproachingsaturationtemperatureandthediameterofabsorbent.Basedontheobservation,whenthestaticheightofthecoarseparticlesinthebedis122mm,themolarratioofCatoSis1.01.1,theap2proachingtosaturationtemperatureis1518,thespacevelocityoffluegasis2850h-1,andthediameterofabsorbentis64m,desulfurizationefficiencyisover90%.Keywordsfluegas;desulfurization;fluidizedbed;sulfurdioxide:(20576072):2004-07-20;:2004-10-08:(1975),,,,E2mail:[e-mail]3,E2mail:[e-mail]11995,SO22350t,94%[1],(FGD)SO2,3,,,;,;,,,,[2,3]7,,,,,,[4],,,[5,6],,,,,,,,,,21SO2,111m,1215cm,5%,,150450m,,,SO2,SO2,,1Fig.1FlowsheetofsemidryFGDwithCPFB,,,,,M2900SSO2DWS508D,D100,,,[7]:CaCO3+SO2+1/2O2+1/2H2O=CaSO41/2H2O+CO2,:=CSO2,i-CSO2,oCSO2,i100%:CSO2,i;CSO2,o;(%)33.13.1.1H,,275m,22Fig.2Effectofstaticheightofcoarseparticlesondesulfurizationefficiency852:2,,,,Ca/S,122mm,CaCO3,90%,Ti120,42,,,,,,3.1.2,3dp,,,,,[8]3Fig.3Effectofdiameterofcoarseparticlesondesulfurizationefficiency,,,,,,,,,,150450m3.23.2.1T,,TbTs:T=Tb-Ts,Tb,TsTb24,,,,,,,SO2,4,[9]:15T45,,;T45T15,T45,,,;T15,,T15,4Fig.4Effectofapproachingtosaturationtemperatureondesulfurizationefficiency3.2.2Fg957,,h-1Fg2850h-1,,5,,,,,,,,,5Fig.5Effectofspacevelocityoffluegasondesulfurizationefficiency3.2.3(Ca/S)CaCO3SO26Ca/S6,115,Ca/SCa/S115,,Ca/S115,CaCO3,,Ca/S,,,;Ca/S115,CaCO3,SO2,Ca/S,,,1153.2.4SO27,SO2,Ca/S,,SO2,SO2,6Ca/SFig.6EffectofratioofCatoSondesulfurizationefficiency7SO2Fig.7EffectofinletconcentrationofSO2ondesulfurizationefficiencySO2-3HSO-3,,,,SO2,SO2,SO220802140mg/m33.2.58ds,Ca/S,,SO2,,,,Geldart[10]C,,,062:8Fig.8Effectofdiameterofabsorbentondesulfurizationefficiency4,1215cm111m,CaCO3,:(1)Ca/SSO2(2),122mm15182850h-1Ca/S11064m,90%,Ca/S,(3)15[1]..,2001,(2):58[2],,..,2002,15(1):5557[3],..,2003,(1):3638[4]YunyiLiu,KunioKato.Processanalysisofsemidrydesulfu2rizationprocessinpowder2particlespoutedbed.JournalofChemicalEngineeringofJapan,2000,33(2):223231[5]XiaoxunMa,TakaoKaneko,QiminGuo,etal.RemovalofSO2fromfluegasusinganewsemidryfluegasdesulfuriza2tionprocesswithapowder2particlespoutedbed.TheCana2dianJournalofChemicalEngineering,1999,22(4):356362[6]XuGuangwen,GuoQimin,KanekoT1,etal.Anewsemi2drydesulfurizationprocessusingapowder2particlespoutedbed.AdvancesinEnvironmentalResearch,2000,(4):918[7]ZhangLi,LiuYun2yi,KunioKato.RemovalofSO2bylime2stoneandsomesaltmixtureinasemidryprocesswithpow2der2particlespoutedbed.JournalofShengyangInstituteofChemicalTechnology,2002,16(3):177183[8]KatoK.,T.Takarada,N.Matsuo,T.Suto,N.Nakagawa.Residencetimedistributionoffineparticlesinapowder2particlefluidizedbed.InternationalChem.Eng1,1994,34(4):605610[9]1.,2001,27(12):490493[10]GeldartD.Typesofgasfluidization1PowderTechnol.,1973,(7):28529216