2016燃燒學(xué)年會集文獻(xiàn)

中國工程熱物理學(xué) 學(xué)術(shù)會議論 劉珂，王濤※，楊占偉，郭光海，張振，馬春元（山東大學(xué)燃煤污染物減排國家工程實(shí)驗(yàn)室，山東濟(jì)南摘要以褐煤為原料，采用一步法快速制備粉狀活性半焦，并研究了制焦溫度和模擬煙氣組分對活NO關(guān)鍵詞StudyonadsorptionofSO2andNObypowderactivatedsemi-cokesLIUKe,WANGTao,YANGZhanwei,GUOGuanghai,ZHANGZhen,MA(NationalEngineeringLaboratoryforCoal-FiredPollutantsEmissionReduction,ShandongUniversity,Jinan250061,China)AbstractActivatedsemi-cokeswerepreparedbytheone-steprapidpreparationtechnologyfromlignite,theeffectsofpreparationtemperatureandsimulatedfluegascomponentsontheadsorptionpropertiesofSO2andNOovertheactivatedsemi-cokeswerestudied.Theresultsindicatedthatthesemi-cokespreparedattemperatureof850℃isofthebestadsorptioncapacitiesofSO2andNObetween400and850℃.Moreover,thesimulatedfluegascomponentsalsohavegreatinfluenceontheadsorptioncapacitiesofSO2andNOovertheactivatedsemi-cokes.H2OcanpromotetheadsorptionofSO2overactivatedsemi-cokes,butinhibittheadsorptionofNO.TheadsorptionpropertiesofSO2overactivatedsemi-cokesaremuchbetterthanthatofNO.SO2andNOcaninhibittheadsorptionofeachotheroveractivatedsemi-cokes.Keywordsactivatedsemi-coke;adsorption;SO2;0基金項(xiàng)目：國家自然科學(xué)基金王濤（1982-），講師，Tel612，Email:wtao@模擬煙氣中SO2和NO性能的影響。（MH1Table1Theproximateandultimateanalysisofraw 在沉降爐反應(yīng)器上制備活性半焦，沉降爐實(shí)驗(yàn)系統(tǒng)如圖1所示。1Figure1Experimentalsystemofpowderactivatedsemi-cokes0.5g/min6L/minN2顆粒的運(yùn)動速度等于氣體流速與顆粒終端速度之和。沉降爐反應(yīng)器采用長2m、內(nèi)徑80mm的耐高溫不銹鋼管。為保證加熱均勻，采用上、下兩段的分段加熱方式。實(shí)驗(yàn)中通過改變沉降爐內(nèi)溫度（℃，℃，℃，℃，℃）研究制焦溫度對活性2OSO2NO吸附性能實(shí)驗(yàn)在恒溫固定床實(shí)驗(yàn)系統(tǒng)上進(jìn)行，該系統(tǒng)包括模擬煙氣配氣系統(tǒng)、固定床反應(yīng)器以及煙氣分析系統(tǒng)，實(shí)驗(yàn)系統(tǒng)如圖2所示。2Figure2ExperimentalsystemoffixedbedN2、O2、SO2、NOH2O組成。N2、O2、SO2、NO由氣瓶供給，可通過控制水浴鍋的溫度及N2流量實(shí)現(xiàn)，氣體流量控制采用質(zhì)量流量計(jì)實(shí)現(xiàn)。水浴鍋400mL/min，模擬煙氣組2N215mm500mm的250mm3001g，反應(yīng)器外部為電加熱裝置，吸附實(shí)驗(yàn)的溫度設(shè)定為75℃。采用傅立葉紅外煙氣分析儀(GasmetDx4000)對反應(yīng)器進(jìn)出口氣體中SO2和NO的濃度進(jìn)行測量。2Table2CompositionofthesimulatedflueO2/H2O/SO2/NO/N6006068068680性半焦對SO2NO的吸附效率hSO2(hNO按式（1）計(jì)算：2hSO(hNO)=(c0-c1)/c0 2P2Q(Q 0

t

1

0 RT 0QSO(QNOSO2（NO）的吸附量，mg/g；P為反應(yīng)壓力，濃度，ppmqv為模擬煙氣體積流量，L/s；MSO2（NO）時(shí)間，s，本文采用2h吸附時(shí)間為標(biāo)準(zhǔn)計(jì)算活性半焦對SO2NO的吸附量。吸附量，其中制焦氣氛中O2體積分?jǐn)?shù)為2%，吸附實(shí)驗(yàn)中模擬煙氣組分為NS。 adsorptionefficiencyofSO2overactivated

adsorptionefficiencyofNOoveractivated3制焦溫度對活性半焦SO2NOFigure3EffectofpreparationtemperatureonadsorptionefficiencyofSO2andNOoveractivatedsemi-4制焦溫度對活性半焦SO2NOFigure4EffectofpreparationtemperatureonadsorptioncapacityofSO2andNOoveractivatedsemi-全吸附（100%）10min，700600℃下依次降低，4005003（b）NO的吸附效率下降速度明顯快于其4500SO2NO的吸附量變化很小，當(dāng)500SO2NO的吸附量均明顯提高；隨著制焦溫400850SO210mg/g30mg/gNO0.8mg/g2.4mg/gSO2的吸附量明顯高NO的吸附量。這說明在一定溫度范圍內(nèi)，隨著制焦溫度的提高，揮發(fā)份釋放速SO2NONOSO2置換解析，從而造成活性半焦吸附SO2的能力強(qiáng)于其吸附NO的能力。56SO2和NO850O22%，模擬煙氣組分見表2。adsorptionefficiencyofSO2overactivated

adsorptionefficiencyofNOoveractivatedsemi-5模擬煙氣組分對活性半焦SO2NOFigure5EffectofsimulatedfluegascompositiononadsorptionefficiencyofSO2andNOoveractivatedsemi-6模擬煙氣組分對活性半焦SO2NOFigure6EffectofsimulatedfluegascompositiononadsorptioncapacityofSO2andNOoveractivated5（a）NOH2OSO2有很大影響，對H2O5（a）bc可知，NOSO25（b）a、bSO2對活性半焦吸附NO的抑制作用更為強(qiáng)烈。NOSO246mg/gNO而沒有H2O5（b）H2OSO2NO有明顯的抑制作性半焦對SO2的吸附性能明顯好于其對NO的吸附性能。下將吸附到表面的SO2最終催化氧化為H2SO4，具體反應(yīng)路徑如下：SO2(gas)fiSO2(ads)O2(gas)fi2O(ads)H2O(gas)fiH2O(ads)SO2(ads)+O(ads)fiSO3(ads)SO3(ads)+H2O(ads)fiH2SO4(ads)2NO(a)fi(NO)2O2+CffiO2(a)(NO)2(a)+O2(a)fi2NO2(a)2NO2(a)fiNO3(a)+H2O存在時(shí)，H2O會占據(jù)活性半焦表面的一部分制焦溫度對活性半焦吸附SO2和NOSO2NO的性能也有很大影響，H2O的存在會促存在對活性半焦吸附NO的抑制作用更為明顯。DaviniP.SO2adsorptionbyactivatedcarbonswithvariousburnoffsobtainedfromabituminouscoal[J].Carbon.2001,39(9):1387-1393.AtanesE,Nieto-MárquezA,CambraA,etal.AdsorptionofSO2ontowastecorkpowder-derivedactivatedcarbons[J].Chemicalengineeringjournal.2012,211:60-67.YudaT,MatsuokaM,HanashitaK,etal.Processforproducingformedactivatedcoke[P].1996-6-王洋，張守玉，房倚天，等SO2脫硫劑－活性焦的制備方法[P].山西：CN1304787,2001-07-25.WangYang,ZhangShouyu,FangYitian,etal.PreparationmethodofSO2desulfurizingagent-activatedcoke[P].Shanxi:CN1304787,2001-07-25.LiangDaming,SunZhongchao,LiLanting,etal.Akindofpreparationmethodandapplicationofactivatedcoke[P].Beijing:CN101538038,2009-09-23.鄒炎.煙氣治理活性焦的制備方法及其制備的煙氣治理活性焦[P].北京：CN1806910,2006-07-26.Zhouyan.Preparationmethodofactivatedcokeforfluegastreatmentandactivatedcokepreparedbythismethod[P].Beijing:CN1806910,2006-07-26.梁大明.活性焦干法煙氣脫硫技術(shù)[J].煤質(zhì)技術(shù)2008(648-LiangDaming.Dry-processfluegasdesulfurizationtechnologywithactivatedcoke[J].CoalQualityTechnology.2008(6):48-51.李兵.粉末活性炭循環(huán)流化床吸附脫除煙氣中SO2的實(shí)驗(yàn)研究[D].濟(jì)南:山東大學(xué),LiBing.ExperimentalstudyonadsorptionremovalofSO2fromfluegasbypowderactivatedcarbonincirculatingfluidizedbed[D].Jinan:ShandongUniversity,2012.ZhangZ,WangT,KeL,etal.Powder-activatedsemicokespreparedfromcoalfastpyrolysis:Influenceofoxygenandsteamatmosphereonporestructure[J].Energy&Fuels.2016.張振.粉狀活性半焦的快速制備過程及SO2吸附特性研究[D].濟(jì)南:山東大學(xué),ZhangZhen.Studyonfastpreparationofpowderactivatedsime-cokeandcharacteristicsofSO2adsorption[P].Jinan:ShandongUniverisity,2016.馬春元，張振，王濤，等一種粉末活性焦快速制備的方法[P].山東：CN104891487A,2015-09-09.MaChunyuan,ZhangZhen,WangTao,etal.Akindoffastpreparationmethodofpowderactivatedsemi-coke[P].Shandong:CN104891487A,2015-09-09.李蘭廷，解煒，梁大明，等.活性焦脫硫脫硝的機(jī)理研究[J].環(huán)境科學(xué)與技術(shù)2010(879-LiLanting,XieWei,LiangDaming,etal.MechanismofremovalofSO2andNOonactiv