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X  'dxd,cAZ"Arial Regular WPC____ o0T#4\;c-C~%L0R,S-]:^;iHjItVuWdersÏď˝˝ҫӬں-Q.T0V2[4_6f8i:m@zDFG-O%,M)0P.5^:6g0BdDTxQrtvw9XF>\KC_QǿZql->.?1A/]jlfDjJDjJiYNDjg/ ]jlfi`VgNjjVRjlJTYd-/`jjGGjVVjgdj]RjjTi)/.5ljGT`djd]jdiVljlVi-/./././(6YJVd]VgjVVjigRjjlV6'./+/)/'+/)$= fDd]NJjjVTjdJjjDg=$'-/,%%,/.)$+/.)$$)-/'$%" djVTjNjDjJJjG`Djf "&$%)++*'$'*+(%$%(+)%$(+'$ / djVVjgVjdJjJJjJdljJT/  6$=  / jTVjdVjdJjGJjJfljg / @%$ / jJiVjVVJjdTjjRfdV`/ 5$9 /lj`VjjVi]VTN` / @&$ /NjJJNVYiVjjVYjD/ 7$%? //fddfVjj VfRJTJjVVDj //5$6/ #/iJjV`jJVjjVTjJj / / $5 / /  Tjl`VjGDjgVjjVdljdJj//1$:/#/  DlfVji]jYVjjTiVjRdlj"// #/1$:/#/ jJYldjVVjJjJiGjjTJjJ//2$A// jGVjYVjJj Jdjl]fNjJf /#/30$09/ #/ Gj]iljdJjGJj JdigYVV`//;$0A/ #/ `jjGTTDjGJjJTjiRjGi"//#/C<0$0Ah/ ##//YjGgDjJVjNjjGVTDjR/! / <0$2\KC_QǿZql->.?1A/]jlfDjJDjJiYNDjg/ ]jlfi`VgNjjVRjlJTYd-/`jjGGjVVjgdj]RjjTi)/.5ljGT`djd]jdiVljlVi-/./././(6YJVd]VgjVVjigRjjlV6'./+/)/'+/)$= fDd]NJjjVTjdJjjDg=$'-/,%%,/.)$+/.)$$)-/'$%" djVTjNjDjJJjG`Djf "&$%)++*'$'*+(%$%(+)%$(+'$ / djVVjgVjdJjJJjJdljJT/  6$=  / jTVjdVjdJjGJjJfljg / @%$ / jJiVjVVJjdTjjRfdV`/ 5$9 /lj`VjjVi]VTN` / @&$ /NjJJNVYiVjjVYjD/ 7$%? //fddfVjj VfRJTJjVVDj //5$6/ #/iJjV`jJVjjVTjJj / / $5 / /  Tjl`VjGDjgVjjVdljdJj//1$:/#/  DlfVji]jYVjjTiVjRdlj"// #/1$:/#/ jJYldjVVjJjJiGjjTJjJ//2$A// jGVjYVjJj Jdjl]fNjJf /#/30$09/ #/ Gj]iljdJjGJj JdigYVV`//;$0A/ #/ `jjGTTDjGJjJTjiRjGi"//#/C<0$0Ah/ ##//YjGgDjJVjNjjGVTDjR/! / <0$2,'0 &   Advantages:   Elutriatorssharemanyoftheadvantagesofothermechanicalcollectors(Wark,1981;Corbitt,1990;Perry,1984;andEPA,1998):'*b Q(eh83Ib J3     J3 ,2eh  1  .3  0 `   Lowcapitalcost;J3 ,C,݌` (#` (# Ќ   J3     J3,2eh  2  .3  0 `   Lowenergycost;J3,'-݌ ;` (#` (# Ќ   J3     J3-2eh  3  .3  0 `   Nomovingparts,therefore,fewmaintenancerequirementsandlowoperatingcosts;J3- .݌ Y ` (#` (# Ќ   J3     J3.2eh  4  .3  0 `   Excellentreliability;J3../݌' w ` (#` (# Ќ   J3     J3/2eh  5  .3  0 `   Lowpressuredropacrossdevice;J3/0݌E  ` (#` (# Ќ   J3     J302eh  6  .3  0 `   Devicenotsubjecttoabrasionduetolowgasvelocity;J30 1݌c ` (#` (# Ќ   J3     J312eh  7  .3  0 `   Provideincidentalcoolingofgasstream;J312݌ ` (#` (# Ќ   J3     J322eh  8  .3  0 `   Temperatureandpressurelimitationsareonlydependentonthematerialsofconstruction;   and,J323݌ ` (#` (# Ќ   J3     J342eh  9  .3  0 `   Drycollectionanddisposal.J34M4݌+` (#` (# Ќ  + Disadvantages:   Elutriatorsalsosharethedisadvantagesofmechanicalcollectors(Wark,1981;andEPA,1998): b "(Uh88Qb J3   0  J3'62Uh  1  .3  0` (#(#  RelativelylowPMcollectionefficiencies;J3'6r6݌f` (#` (# Ќ   J3   0  J3@72Uh  2  .3  0` (#(#  Unsuitableforstickyortackymaterials;andJ3@7w7݌Q ` (#` (# Ќ   J3   0  J3H82Uh  3  .3  0` (#(#  Largephysicalsize.J3H88݌"` (#` (# Ќ  R6b G( 88"b &  OtherConsiderations: '9 % 2  21001Themostcommonfailuremodeofelutriatorsispluggingofthedevicewithcollecteddust.Pluggingcanresultfromhopperbridgingorhopperdischargesealfailure.Suchfailurescanbepreventedorminimizedbyuseofhopperlevelindicatorsorbycontinuousmonitoringofthedustdischarge.Scheduledinternalinspectioncandetermineareasofairleakageandcondensation,bothofwhichmaycausehopperbridging.Normalinstrumentationforanelutriatorgenerallyincludesonlyanindicatorofdifferentialstaticpressure.Anincreaseinstaticpressuredropcanindicateplugging(EPA,1982).10012':2 References:  #N. Corbitt,1990. StandardHandbookofEnvironmentalEngineering,editedbyRobertCorbitt,McGrawHill,NewYork,NY,1990.EPA,1982.U.S.EPA,OfficeofAirQualityPlanningandStandards, ControlTechniquesforParticulateEmissionsfromStationarySourcesVolume1,EPA450/381005a,ResearchTrianglePark,NC,September.EPA,1996.U.S.EPA,OfficeofAirQualityPlanningandStandards, OAQPSControlCostManual,FifthEdition,EPA453/B96001,ResearchTrianglePark,NCFebruary,1996.  -W(9 EPA,1998.U.S.EPA,OfficeofAirQualityPlanningandStandards, StationarySourceControlTechniquesDocumentforFineParticulateMatter,EPA452/R97001,ResearchTrianglePark,NC,October,1998. Parsons,1999.B.Parsons,SterlingSystems,Inc.,(804)3165310,personalcommunicationwithE.Albright,October26,1999.Perry,1984. PerrysChemicalEngineersHandbook,editedbyRobertPerryandDonGreen,6thEdition, n  McGrawHill,NewYork,NY,1984.Steinbach,1999.R.Steinbach,SolidsProcessingEquipmentCo.,(714)7799279,personalcommunicationwithE.Albright,October26,1999.Wark,1981.KennethWarkandCecilWarner, AirPollution:ItsOriginandControl,HarperCollins,NewYork,NY,1981.