鍋爐改造中方形臥式分離器的研究與開發(fā).pdf

1、浙江大學碩士學位論文鍋爐改造中方形臥式分離器的研究與開發(fā)姓名：王東申請學位級別：碩士專業(yè)：工程熱物理指導教師：程樂鳴王勤輝20030101浙江大學碩士學位論文王東ABSTRA(汀ABSTRACTBecauseofthebehindhandfacilitiesandtechnologyofcoalcombustion，therearecertainproblemssuchaslowcombustionefficiencyseriouspo

2、llutionproblemsOI“costlyfuelcostinalargenumberofregularboilers(includingpulverized‘coal—firedboilers，chaingratestokerboilers，oilburningboilers)inourcountTyOneofsolulionstoaboveproblemsistetrofitthoseboilerstoCFBonesGasso

3、lidseparatorplaysavitalroleduringtheprocessTothiscase，anewkindofcyclone，thehorizontalsquarecyclone，hasbeenpresentedinthispaperTherearethreepartsinthispaperInthefirstpart，thedevelopmentofcycloneshasbeensummarized，includin

4、gcapabilitycriterionsforcycloneevaluation，factorsaboutseparationcapabilityanddevelopmentofflowfieldwithincyclonesandseveralclassicalcyclones。ThenthehorizontalsquarecyclonehasbeenintroducedforboilerretrofitInthesecondpart

5、，basedontheelementaryconfiguration—optimizationtestonthehorizontalsquarecyclone，theexperimentaboutseparationefficiencyandpressuredrophasbeendoneTheresultsshowsthat，fortheparticlewhichdiameterislargerthan100工Im，theseparat

6、ionefficiencyofthecycloneishigherthan90％，whileitspressuredroplowerthan1500Pa；盔知isabout50ttm(whileV=18m／s，J口=08kg／m3)，Inaddition，byanalyzingthesedata，twoempiricalregressingformulaehavebeenputforwarduponseparationefficienc

7、yandpressuredropInthelastpart，F(xiàn)LUENTisusedtocalculatethetrajectoryofparticles，whichhavedifferentsizesThensomeinformationaboutflowfieldhasbeenobtainedbesidestheparticletrajectoriesTheresultshowsthattwoclearvortexesexistin