1、BRITISH STANDARD BS EN 858-2:2003 Separator systems for light liquids (e.g. oil and petrol) Part 2: Selection of nominal size, installation, operation and maintenance The European Standard EN 858-2:2003 has the status of a British Standard ICS 13.060.30 BS EN 858-2:2003 This British Standard was pub
2、lished under the authority of the Standards Policy and Strategy Committee on 15 April 2003 BSI 15 April 2003 ISBN 0 580 41600 3 National foreword This British Standard is the official English language version of EN 858-2:2003. The UK participation in its preparation was entrusted to Technical Commit
3、tee B/505, Wastewater engineering, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be fou
4、nd in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are resp
5、onsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep
6、the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright date displayed i
7、n this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN8582 January2003 ICS13.060.30 Englishversion Separatorsystemsforlightliquids(e.g.oilandpetrol)Part2: Selectionofnominalsize,installa
8、tion,operationand maintenance Installationsdesparationdeliquideslgers(parexemple hydrocarbures)Partie2:Choixdestaillesnominales, installation,serviceetentretien AbscheideranlagenfrLeichtflssigkeiten(z.B.lund Benzin)Teil2:WahlderNenngre,Einbau,Betriebund Wartung ThisEuropeanStandardwasapprovedbyCENon
9、29September2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManageme
10、ntCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandar
11、dsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG M
12、anagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN8582:2003EEN8582:2003(E) 2 Contents page Foreword3 1 Scope 3 2 Normativereferences 3 3 Termsanddefinitions. .4 4 Determinationoftypeandsizeofseparators
13、ystems . 4 4.1 General4 4.2 Componentsofseparatorsystems,theircombinationandapplication4 4.2.1 General4 4.2.2 Bypassseparators. 4 4.2.3 Classesofseparators. .5 4.3 Sizingofseparators .5 4.3.1 General5 4.3.2 Factors 5 4.3.3 Combineddrainageofrainwaterandwastewater. .6 4.3.4 Wastewater .6 4.3.5 Rainwa
14、terflowrate . .8 4.3.6 Spillages .8 4.3.7 Quantityoflightliquid .8 4.3.8 Specialcases. .9 4.4 Sludgetraps .9 5 Installation 9 5.1 Limitations9 5.2 Retentionoflightliquid. 10 5.3 Automaticwarningdevicesandelectricaldevices 10 5.4 Drainagetoandfromseparatorsystems 10 5.5 Placeofinstallation . 10 5.6 P
15、rotectionagainstescapeoflightliquids .10 5.7 Connectiontothedrainagesystem. 12 6 Operation,inspectionandmaintenance . 12 AnnexA (informative) Densityfactor f d forparticularlightliquidsandcombinationofcomponents14 AnnexB (informative) Configurationandapplicationofseparatorsystems17 Bibliography 20EN
16、8582:2003(E) 3 Foreword ThisEuropeanStandard(EN8582:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC165“Wastewater engineering“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJuly2003,andc
17、onflictingnationalstandardsshallbewithdrawnatthelatestby July2003. Itisthesecondpartofatwopartstandardforseparatorsystemsforlightliquids.Part1givesprinciplesofdesign, performanceandtesting,markingandqualitycontrolofseparatorsystemsforlightliquids. Whenpollutioncontrolrequiresthetreatmentofpollutants
18、otherthanlightliquids,additionalmeasurescanbe necessary. TheannexesAandBareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,H
19、ungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom. 1Scope ThisEuropeanStandardappliestoseparatorsystemsusedtoseparatehydrocarbonsofmineraloriginfrom wastewater.Itdoesnotapplytogreaseandoilsofvegetableoranimaloriginnortosep
20、arationofemulsionsor solutions. ThisEuropeanStandardprovidesguidanceontheselectionofnominalsizes,aswellastheinstallationoperation andmaintenanceoflightliquidseparatorsmanufacturedinaccordancewithEN8581.Italsogivesadviceonthe suitabilityofcleansingagentsiftheyaredischargedtoaseparator. 2 Normativeref
21、erences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Sta
22、ndardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN7522, DrainandsewersystemsoutsidebuildingsPart2:Performancerequirements. EN7524, DrainandsewersystemsoutsidebuildingsPart4:Hydraulicdesignandenvironmental
23、consideration. EN8581:2002, Separatorsystemsforlightliquids(e.g.oilandpetrol)Part1:Principlesofdesign,performance andtesting,markingandqualitycontrol.EN8582:2003(E) 4 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN8581aswellasthefollowing termanddefinitiona
24、pply. 3.1 cleansingagent chemicalsubstancewhich,whencombinedwithlightliquids,initiallyformsanemulsionduringcleaningprocess thatrapidlybreaksdownintheseparator 4 Determinationoftypeandsizeofseparatorsystems 4.1General Separatorsystemsareusedinawidevarietyofsituationstofulfilanumberofdifferentrequirem
25、ents.Itisimportant toestablishwhyaseparatorsystemisneededandwhatspecificfunctionitisexpectedtofulfilbeforeselectingthe appropriatesizeandtypeofinstallation. Generally,separatorsystemsareinstalledforoneormoreofthefollowingreasons: a) totreatwastewater(tradeeffluent)fromindustrialprocesses,vehiclewash
26、ing,cleansingofoilcoveredparts orothersources,e.g.petrolstationforecourts; b) totreatoilcontaminatedrainwater(runoff)fromimperviousareas,e.g.carparks,roads,factoryyardareas; c) toretainanyspillageoflightliquidandtoprotectthesurroundingarea. Wherethereisnospecificsizingmethodgivenbyaregulatoryauthori
27、tythefollowingguidanceonsizingofthe separatorsystemshallbeused: 4.2 Componentsofseparatorsystems,theircombinationandapplication 4.2.1General ThecomponentpartsofseparatorsystemscomplyingwithEN8581arelistedinTable1. Table1Componentsofseparatorsystems Components Codeletter Sludgetrap S SeparatorClassII
28、 II,IIb(forbypassseparators) SeparatorClassI I,Ib(forbypassseparators) Samplingshaft P AnnexBgivesguidanceontheselectionofcomponentstosuitparticularapplications. 4.2.2 Bypassseparators Bypassseparatorsincludeadevicetoallowaflowinexcessofthemaximumpermissibleflowtobypassthe separator.EN8582:2003(E) 5
29、 Bypassseparatorsarenotsuitableforcategorya)uses(see4.1).Theyshallbeusedonlyinlocationswhereitis unlikelythattherewillbesignificanthydrocarboncontaminationduringtimesofheavyrainfall. Separatorsystemsshallnotsurchargeorcausesurchargingupstreamwhensubjecttotheirmaximumdesignflow. 4.2.3 Classesofsepara
30、tors Classesofseparators(classIandII)aredefinedinEN8581:2002,clause4. ClassIseparatorsprovideahigherdegreeofseparationthanclassIIseparators(seeTableB.2forapplications). 4.3 Sizingofseparators 4.3.1General Thesizingoflightliquidseparatorsshallbebasedonthenatureandflowrateoftheliquidstobetreatedandwil
31、l needtotakeaccountof: maximumflowrateofrainwater; maximumflowrateofwastewater(tradeeffluent); densityofthelightliquid; presenceofsubstancesthatmayimpedeseparation(e.g.detergents). Thesizingdoesnottakeintoaccountspecialoperationalconditions(see4.3.8). Thesizeoftheseparatorshallbecalculatedfromthefol
32、lowingformula: d s x r f Q f Q NS ) ( + = (1) where NS isthenominalsizeoftheseparator; Q r isthemaximumflowrateofrainwater,inl/s; Q s isthemaximumflowrateofwastewater,inl/s; f d isthedensityfactorfortherelevantlightliquid; f x istheimpedimentfactordependingonthenatureofthedischarge. 4.3.2Factors 4.3
33、.2.1 Impedimentfactor f x Theimpedimentfactor f x allowsforunfavourableseparatingconditions,e.g.wheredetergentsarepresentinthe wastewater.TheminimumrecommendedimpedimentfactorsarelistedinTable2.EN8582:2003(E) 6 Table2Minimumimpedimentfactors f x Dischargetypeinaccordancewith4.1 f x a) 2 b) notreleva
34、ntas Q s =0(onlyrainwater) c) 1 4.3.2.2 Densityfactor f d Thedensityfactorf d allowsfordifferingdensitiesoflightliquidswhenusingdifferentcombinationsofsystem components.AdditionalinformationisgiveninannexA. Table3Densityfactors f d Density g/cm upto0,85 over0,85upto0,90 over0,90upto0,95 Combination
35、Densityfactor f d SIIP 1 2 3 SIP 1 a 1,5 a 2 a SIIIP 1 b 1 b 1 b a ForclassIseparatorsoperatingbygravityonly,use f d forclassIIseparator. b ForclassIandclassIIseparators. 4.3.2.3Cleansing agents Cleansingagentmanufacturersshallsubmitadeclarationstatingthattheproductisfreefromorganicallycombined halo
36、gencompoundsorBTXaromas.Onlycleansingagentswhichformtemporarystableemulsionswithlight liquidsandthendeemulsifyafterthecleaningprocessshouldbeused.Instructionsforuseshallalsobeprovided, togetherwiththeeffectsofmixingwithothercleansingagents,particularlyregardingtheseparationprocess. 4.3.3 Combineddra
37、inageofrainwaterandwastewater Ifaseparatorisreceivingrainwaterandwastewater,e.g.fromvehiclewashing,andthetwomaximumflowsarenot expectedtooccursimultaneously,thentheseparatorcanbesizedforthehigherflowrate. 4.3.4Wastewater Thewastewaterinflowinaccordancewith4.1,casea),shallbecalculatedasthesumofthecon
38、tributingflowsfrom thefollowingformula: . 3 2 1 + + + = s s s s Q Q Q Q (2) where Q s1 istheflowfromdrawoffpoints,inl/s; Q s2 istheflowfromcarwashes,inl/s;EN8582:2003(E) 7 Q s3 istheflowfromhighpressurecleaningunits,inl/s. Anyothercontributingflowshallbeadded. 4.3.4.1Drawoff points Whereitisnotpossi
39、bletodeterminethemaximumflowfromdrawoffpointsbymeasurement,itmaybeestimated byusingTable4.Table4takesaccounttheprobabilityofthelikelihoodofalldrawoffpoints,irrespectiveofsize, beingusedatthesametime.Calculationsshouldbebasedontheflowratesfromthelargestdrawoffpointsfirst. Table4Flowratesfromdrawoffpo
40、ints Drawoffpoints Nominaldiameter Flowsfromdrawoffpoint Q s1 a inl/s 1stpoint 2ndpoint 3rdpoint 4thpoint 5thpointandsubsequent DN15 0,5 0,5 0,35 0,25 0,1 DN20 1,0 1,0 0,70 0,50 0,2 DN25 1,7 1,7 1,20 0,85 0,3 a Valuesgivenforsupplypressureofabout4barto5bar;othersupplypressuresmaycausedifferent Q v v
41、alues. Exampleforcalculationof Q s1 for1DN15,1DN20and2DN25points: 1stpoint DN25=1,7l/s; 2ndpoint DN25=1,7l/s; 3rdpoint DN20=0,7l/s; 4thpoint DN15=0,25l/s; Q s1 =4,35l/s Incaseofsupplypressuredifferingfromthatstatedinfootnote1ofTable4,theflowfromdrawoffpointshallbe calculatedfromthefollowingformula:
42、bar bar 4 ) bar 4 ( 1 s ) xbar ( 1 s x Q Q = (3) where Q s1(xbar) istheflowfromdrawoffpointatasupplypressureof x bar,inl/s; Q s1(4bar) istheflowfromdrawoffpointasgiveninTable4,inl/s. 4.3.4.2 Automaticcarwashes(rollover,drivethrough) Wastewaterfromlowpressurecarwashes(withabackpressureupto20bar)where
43、onlycarriagebodiesand chassisarecleaneddoesnotusuallycontainanysignificantamountoflightliquid. Shouldtherebewastewaterfromhighpressurecarwashes(withabackpressurehigherthan20bar)and/orany additionalwashingprocedureswhichwillresultinwastewatercontaininglightliquids,thenforeverycarwashplace ordrivethroughawastewatervalueQ s2 of2l/splusawastewatervalue Q s3 foreachhighpressureunitin accordancewith4.3.4.3shallbeincluded.Whenth
