電廠天然氣鍋爐富氧燃燒特性研究.pdf

1、北京交通大學碩士學位論文電廠電然氣鍋爐富氧燃燒特性研究姓名：張楊申請學位級別：碩士專業(yè)：工程熱物理指導教師：楊飛201106ABSTRACTInChinathemainsourceofgreenhousegasemissionsWasfromthermalpowerplantsbasedonbumingfossilfuels，whichcanbeeffectivelyreducegreenhousegasemissions，byusin

2、goxygenenrichedcombustiontechnologyInrecentyears，thenumbersofgasboilerswereincreasedamongChina’Spowerplants，andnlecunentresearchesforcombustioncharacteristicsofoxygen—enrichedinpowerplant，sgasboilerswerefewThispaperinves

3、tigateda325MWgaspowerplantboilerwhosecharacteristicsofgasoxygen—enrichedcombustionwerestudiesbythemethodsofexperimentalandnumericalsimulationThecharacteristicsofnaturalgasforoxygenenrichedcombustionweresnldiesintheatmosp

4、hereofO到rN2Theresultsshowedthat，withtheincreasingofoxygenconcentrationfrom21％to30％戧1eflametemperatureincreasedthedistributionofhightemperatureareawasmoreconcentratedWhentheoxygenconcentrationwasgreaterthan27％，therisingof

5、temperaturesloweddownMathematicalmodelsofcombustionprocessweresetupfornaturalgasboilerandthismodeIWasappliedtosimulatethetestbedwhichWasprovedtobeaccurateThecombustioncharacteristicsofnaturalgasboilerinpowerplantwerestud

6、iedbvthemethodofnumericalsimulationbothbythetraditionalapproachandtheoxygenenrichedcombustiontechnology(02／C02combustiontechnology)Theresuitsshowedthatwhentheoxygenconcentrationwas25％，thetemperaturedistributionandfluegas

7、radioactivepropertiesinthefurnacewereclosetothe缸aditionalcomblIstionWhentheoxygenconcentrationisincreasedfrom21％to40％，tlle鋤oul吐ofsmokedecreasedby41％，thetemperatureoffurnaceflueWasfoundtohavemoresignificaI：吐improvementthe

8、averagetemperatureintheburnersectionincreasedmorethan300Kvolumeaccountsoftheflameinfurnacebecameworse，theburnoutrateslightlvdecreased，gasradiationincreasedandheatfluxoftheradiationheat仃a11sfbr丘omtIlefurnacewallincreasedb

9、y26％Thecombustioncharacteristicsofoxygen—enrichedfornaturegaswereexamil】edbynumericalmethod，invariousairsupplyingconditionsTheresultsshowmatcomparedwithoxygenblownbythesecondaryairandthegradedairwhenoxygenblownuniformlyt