电除尘器阴、阳极收尘潜力的分析

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1、华北电力大学硕士学位论文Abstract“Emissionstandardofairpollutantsforthermalpowerplants”(GB13223-2011),whichwasimplementedinJanuary1st,2012,hasstipulatedthatthedustemissionconcentrationofcoal-firedboilerin3thermalpowerplantislimitedto30mg/Nmandthedustemissionconcentration

2、ofsomeexceptionalkeyareasshallnotexceed20mg/Nm3.Thisstandardequipmentforthermalpowerplantelectrostaticprecipitatorahighertechnicalrequirements.Inthispaper,spoilerandconductivefilterplankswasstudiedbynumericalsimulation.TheGambitsoftwarewasusedtobuildthemodel

3、.TheairflowdistributionwassimulatedbytheFluentsoftware.Inordertoobtaintheoptimalshapeforspoiler,flowfiledoftheESPwithdifferentshapesspoilerwassimulated.Resultsshowthat:settingtheSpoilercanformalowvelocityzoneinthevicinityofthecoronawire,conducivecathodedustc

4、ollection;thespoilerintheshapeof“︱”and“〔”canmakethefluegasvelocitybewell-distributed.Bychangingthemountingpositionoftheconductivefiltertank,flankheight,width,holingrate,obtaineddifferentair-flowdistribution.Thenumericalsimulationresultsshowthat:settingtheSpo

5、ileraftertheanodeplatecanformalowvelocityzoneinthebehindoftheanodeplate,conducivetothecollectionofdust;decreasethemountingdistance,theairflowdistributiontendstobeuniform;theflankheightdoesnotaffecttheflowdistributionandtheamountofgasthatentertheconductivefil

6、terplank;withtheincreaseofthewidth,theair-flowdistributioninsidetheelectricfieldtendstobeuneven,butgasentertheconductivefilterplankincreases,sothewidthcanbeadjustedaccordingtodemand;whentheholingrateis50%,theair-flowdistributionisbest.Thesimulationresultsoft

7、heconductivefilterplanksandgrooveplanksshowthat:replacethegrooveplankswithconductivefilterplankshaslittleeffectontheairflowdistributionofthefrontoftheelectrostaticprecipitator;conductivefilterplanksismoreconducivetoimprovingtheuniformityoftheairdistribution.

8、Thenumericalresultsofthispaperprovideatheoreticalbasisforthedesignandmodificationofelectrostaticprecipitator.Keywords:electrostaticprecipitator;numericalsimulation;spoiler;conductivefilterplank;