貴州典型高汞煤溫和熱解過(guò)程中汞的釋放及形態(tài)轉(zhuǎn)化規(guī)律的研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文貴州典型高汞煤溫和熱解過(guò)程中汞的釋放及形態(tài)轉(zhuǎn)化規(guī)律的研究姓名：李婷婷申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：熱能工程指導(dǎo)教師：陳剛20110109II華中科技大學(xué)碩士學(xué)位論文AbstractCoalisthemajsourceofpowernowadays.Mercuryemissionsattributedtocoalcombustioncausedgreatharmtotheglobalecologicalenvironme

2、nthumanhealth.Ithasbecomeahotresearchtopicthathowtocontrolmercuryemissionsfromcoalcombustion.Itisessentialtoanalyzethemercuryspeciationdistributioninthefluegasbecausethephysicalchemicalpropertiesaredifferentinthedifferen

3、tfms.Mercuryincoalcanberemovedwithoutheatvaluelossintheprocessofpyrolysisunderlowtemperaturebyusingmildthermalupgrading.TwocoalsampleswithhighmercurycontentfromGuizhouprovincewereedinthestudy.Firstlythereleasingacteristi

4、csspeciationdistributionofmercuryduringmildthermalupgradingprocessbefecoalcombustionwerestudied.Thenthesoftwareofchemicalthermodynamiccalculationwasusedtopredictthespeciationdistributionofmercuryinfluegasesduringcombusti

5、onpyrolysis.Themildthermalupgradingexperimentwascarriedoutbyusingahizontaltubefurnace.Thereleasingacteristicsspeciationdistributionofmercurywerestudiedunderdifferenttemperaturesatmospheresresidencetimesheatingrates.Theme

6、rcuryincoalwasanalyzedbyDMA80.ThegaseousmercurywascollectedbyusingOntariohydromethodanalyzedbyQM201.Itindicatesthattemperatureistheprimaryfactaffectedonthemercuryrelease.Themercuryreleaseefficiencyishighlyimprovedbetween

7、350400underlow℃oxidizingatmospherethepercentageofdivalentmercuryishigher.FinallyFactSage5.4thesoftwareofchemicalthermodynamiccalculationwasusedtopredictthespeciationdistributionofmercuryinfluegasesduringcombustionpyrolys