袋式除尘器的除尘效率研究

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1、西南交通大学硕士学位论文袋式除尘器的除尘效率研究姓名：周军申请学位级别：硕士专业：环境工程指导教师：王文勇20070401西南交通大学硕士研究生学位论文第1l页ABSTRACTHavebeenusedfortwentyyears，bagfilterswhichwereproducedbyoldenterprisesin1980sinChina，agedandworkdifficultly,andnon·normaldamageofthebagsbecomemoreandmore，whichcannotsatisfyther

2、equirementsofenvironmentalprotection．Soweneedrenovationbadly．Becauseoftheexpansionofproductionanddisabilityofmeetthedemandsofproductionprocesstheoriginaldustremovalsystem，someenterprisesrealizetheneedsofgearing．Becauseoftheveuue，fundingandtime．constraints，enterpri

3、seslookforwardtoefficient，energy—saving，practicaldustmodificationtechniques．Asmentionedbefore，thethesisfocusesonthefilteringofbagfiltersandwefindthatefficiencyiswhatpeopleconcernmost．Moreovertheefficiencyformulaofclassicalfiltrationtheoryisexpressedasimplicitfunct

4、ionandisinconvenienttobeused．howeveritonlycanbeusedunderstationaryfiltrationconditionandCannotworkundernon—stationarymtrationcondition．Excepttheseproblemshowtopredictthepressuredropundernon-stationaryconditionisanotherproblem．Inordertoresolvetheseproblemsmentioned

5、above，firstlytheauthoranalyzedthechangelawoffiltrationefficiencywheneachfactorwhichaffectsfiltrationefficiencychangedsolely．Inthebaseofthis，thetestingsetofbagfiltrationwassetup．Theexperimenthasbeendoneunderstationaryfiltrationconditionanduon—stationaryfiltrationco

6、nditionrespectively．Undercleanfiltrationstage，firstlytheauthortookthestudyabouttheeffectoffiltrationvelocityonfiltrationefficiency．Theresearchshowsthatthereexistsacriticalvelocity．Sothepointofconstructionoptimizationshouldbeconcentratedonthefiltercylinder．Atlastfr

7、omthemultianalysis，theregressionrelationoffiltrationefficiencywasobtained．AftercomparingthisformulawiththetestdataandtheoreticalcalculatiOn．theauthordrewaconclusionthatthisformulacouldbeusedtopredictthefiltrationefficiency．Underdustfiltrationstage，theauthormadeath

8、eoreticalderivationof西南交通大学硕士研究生学位论文第1

9、I页filtrationefficiencyunderdustfiltrationstage．Basedonclassicalfiltrationtheory,accordingthecharacteristicofdustf