燃煤锅炉排放小颗粒污染及声波团聚排放控制研究

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1、洳≥：≥、博士学位论文⑧论文题目燃堪堡坦盎趑型!题趋透鎏作者姓名筮鸿指导教师签卫洼瞳±竖地迭数援堡明、江数撞所在学院扭篮堂瞳提交日期2鲤鱼生!Q县浙江大学博士学位论文声强、频率、粒径分布和温度等参变量对于团聚频率系数的影响。建立了烟尘颗粒声波团聚气溶胶动力学方程并进行数值求解，与实验数据进行对比吻合较好，分析了主要参数声压(SPL)、频率、烟尘浓度、团聚时间对声团聚过程的影响，得到较优化的实验参数选取范围。关键词：颗粒物；PMlo-PM2．5．燃煤电厂；重金属元素；多环芳烃(PAHs)；BET：飞灰；声波团

2、聚；气溶胶动力学方程ⅡAbstractTheenergyConsumesstructuredependingoncoalfiredpowerplantsmakeseriouspollutiontotheenvironment．inChinaforalongtime．Particulatesemissionfromcoalcombustionisoneoftheimportantsourcg$ofInhalableParticulate(P)intheatmosphereenvironment．PMt0,es

3、peciallyPM25hasbecomethemostimportantairpollutantinonrcountryandhasbeenattraetadattentionintheworldatpresent，$ineoitnotonlyeffectstheworldclimatechange，destroysecologysystemandhistoryarchitectures，butalsohasamountofadverseeffectsonhumanhealthaccordingtoepi

4、demiologicalstudies．FluegassampleexperimentsemittedfromcoalfiredboilerworeperformedthroughanisokineticallydesignedsystemaccordingtosouseemissionUSEPAMethod5．Particulatesampleswel'eextractedfromfluegasofCFBboilersusingcascadeimpactors．Particlesizedistributi

5、onandthefractionofPMl0／PM2．5influegasarecalculatedatupstreamanddownstreamoftheelectrostaticprecipitatorandcaptureefficieneiesofPMl0／PM2．yPMl．oforESPwerederivedinthethesis．HeavymetalsandPAHsdimributioninPMl0fromcoalfiredfluegasweremeasuredinexperiments．Char

6、acteristicsofsurfacepropertiesofdifferentsizeparticleswereanalyzedwitlllow—temperaturenitrogenabsorptionBETexperiments．SeveraltoxicheavymetalsincludingHgCd，PbetalconcentrationinparticulateswasanalyzedandtheresultshowstheconcentrationsofmediumvolatilityCdan

7、dPbincreasewithdecreasingparticlesizeandtendstoenrichinsubmieronparticles．Hgisakindofvolatileelement，and90％ofrigexistsinfluegasandflyash．PAHsconcentrationinPMlo／PM25sampledatinletandoutletofESPweremeasuredandresultsshowt11at5／6-ringPAHsaremoreabsorbedinsma

8、llparticles．BETsurfaceareaofsegregatedparticlescanbederivedfromhysteresisloopsandPM2．5hasthegreatestsurfaceareacomparedtootherparticles．Thusmanypollutantssuchastoxicheavymetals．organicmatterandacidgasaleprone