DL 519062012 电力建设施工技术规范 第6部分 水处理及制氢设备和系统英文

DL5190.6-2012

TechnicalSpecificationforThermalPowerErectionandConstruction

Part6:WaterTreatmentandHydrogenGenerationEquipmentSystem

Contents

1Generalprovisions4

2Terms4

3Basicrequirement6

3.1Generalrequirement6

3.2Constructionengineering7

3.3Inspectionandstorageofequipmentandmaterials8

3.4Leaktestofequipmentandsystem9

3.5GreenConstruction10

4Waterpretreatmentequipment11

4.1Conventionalequipment11

4.2Ultrafiltrationandmicrofiltrationequipment15

4.3Wastewaterdisposalequipment16

5Waterpre-demineralizationequipment17

5.1Reverseosmosisunit17

5.2Seawaterdesalinationandevaporationequipmentand

thermalcompressionandjettingequipment20

5.3Stainlesssteelequipmentandpipelineprotection22

6Boilerfeedwatertreatmentequipment23

6.1Ionexchangeequipment23

6.2Carbondioxideremovaldevice25

6.3Electricdeionizationdevice25

7Condensatedwaterprocessingequipment26

7.1Generalrequirement26

7.2Filters27

7.3Ionexchangersandregenerationdevice27

8Coolingwatertreatmentequipment27

8.1Sterilizationdevice27

8.2Scaleandrustinhibitiondevice29

8.3Makeupwaterandby-passflowtreatmentequipment29

9Samplinganddosingsystem30

10Boxes,drumsandtanks33

11Rotatingmachineryandotherequipment34

11.1Hydratedlimemachinesandlimecrane34

11.2Watertreatmentpumps34

11.3Aircompressorsandaccessoried37

11.4Agitators39

12Specialpipingandvalves39

12.1Generalrequirement39

12.2Specialmediapipeline40

12.3Pipemadeofspecialmaterials41

12.4Specialvalves45

13Anticorrosiveconstruction45

13.1Generalrequirement45

13.2Anticorrosiveconstructionprocess46

13.3Constructionofplastics49

14Startupandadjustmentofwatertreatmentsystem51

14.1Generalrequirement51

14.2Waterpretreatmentandpre-demineralizationsystem51

14.3Desalinationsystem54

14.4Condensatetreatmentsystem54

15Hydrogenstation55

15.1Generalrequirement55

15.2Inspectionandinstallationofequipmentinhydrogen56

15.3Inspectionandinstallationofpipinginhydrogen57

15.4Startupandadjustmentofhydrogengenerationequipment..60

1Generalprovisions

1.0.1Thistechnicalspecificationiscompiledforconstructionofwatertreatmentandhydrogengenerationequipment.

1.0.2Thispartapplytonew-build,extensionandrebuildwatertreatmentandhydrogengenerationequipmentandsystemof1000MWandunder1000MW

thermal

power

plant

,cyclegas-steamturbineunits,conventionalislandofnuclearpowerstationandBOPsystem.

1.0.3Watertreatmentandhydrogengenerationequipmentandsystemconstructionmeetthepartandrelevantprovisionsofnationalstandardsandcurrentstandards.

2Terms

2.0.1Waterpretreatment

Processingwaterbyprecipitation,coagulationandclarification.

2.0.2Clarification

Producewaterwithlittleparticlesbyprecipitationofsuspendedparticlesinlargetank.

2.0.3Filtration

Removeparticlesbypassingfitterstrainer.

2.0.4Ultrafiltration

Ultrafiltrationisinbetweenmicrofiltrationand

nanofiltration

,filteringrecisionbetween0.01μmand0.10μm.Thetypesincludevacuumandpressure.

2.0.5Microfiltration

Microfiltrationisinbetweengeneralfilterandultrafiltration,filteringrecisionbetween0.1μmand1.0μm.

2.0.6Reverseosmosis

Wedoforciblyhigherthantheosmoticpressureofthesolutionatthesideofthemembrane,thatisthesideofrawwater,allowingwaterandsomecomponentsselectivetransmission,andothermaterialcan'tthroughthemembrane.

2.0.7Recycledwater

Wastewatercanbeusedafterpropertreatment,ofwhichqualityisinaccordancewithstandard.

2.0.8Wastewater

Thewaterdischargedwhichfrompowerplant,thewatercanbeusedaftertreatment.

2.0.9Tightnesstestwithvacuumbox

Themethodofcheckingleakfor

welding

ofwatertankbaseplatewithvacuumbox.

2.0.10Lowtemperaturemulti-effectdistillationunit(LT-MED)

UsethespraAniongtechnologyoflowtemperaturehorizontaltubefordistillation,ofwhichmaximumtemperatureofsaltwaterlessthan70℃.

2.0.11

Desalination

Theprocessofremovingthesaltinthewater,desaltedwatercanbeusedof

drinking

water

,productionwatersupplyand

cooling

water

.

2.0.12Electrodeionization

Inthefreshwatercompartmentofelectrodialyzerfillinganionandcationmixedionexchangeresin,combiningelectrodialysisandionexchange,removeioninwater,makeuseofpolarizationphenomenonintheprocessofelectrodialysis,doelectrochemicalregenerationforionexchangeresin.

2.0.13Ionexchange

Theprocessofsomeanionorcationinwaterthroughthefilterbed.

2.0.14Perforated-steelandplasticcompositepipe

Perforated-steelandplasticcompositepipeisreinforcementofporous

sheet

steel

pipe

throughhydrogenarcwelding.Anewcompositepipeof

two-sided

compositethermoplasticplastics.

2.0.15Electricalfusionbellandspigotconnection

A

connection

method

thatconnectedpipeinsertedintomuzzlebellandcontactareaofmuzzlebelltogetherbyfusionwelding,makeuseofGreatheatproducedby

electrical

heating

element

insertedintoinnerwallofmuzzlebellwithelectricity.

2.0.16Stainlesssteellinedcompositesteelpipe

Adopting

compound

technology

,steelpipeusedforfluidtransport,suchasweldedpipe,seamlesspipe,ect,theirinnerwallliningwith

stainless

steel

anticorrosivelayer,whichmakeupCompositestructurewallpipe.

2.0.17Electrolysisthesaltsolution

ElectrolysisIndustrial

sodium

chloride

solution

,ChemicalMethodsthatproduce

sodium

hypochlorite

and

chlorine

.

3Basicrequirement

3.1GeneralRequirement

3.1.1Thepartincludetherequirementsofwatertreatmentandhydrogengenerationequipmentandsystem,involvesmechanicalinstallation,pipeinstallation,weldingconstruction,monitoringinstrumentandprogrammedcontrolect,itshouldmeettherelevantprovisionsofnationalstandardsandcurrentstandards.

3.1.2Themainequipmentmanufacturersshouldhave

manufacturing

licence

issuedbystate,province(autonomousregion),Direct-controlledmunicipalityorthestateadministrative

supervision

and

administration

department.Qualityacceptanceof

equipment

manufacture

onthebasisofthecurrentrelevantstandardsofthestateorindustry,ifnorulers,inaccordancewiththecontract.

3.1.3Allkindsofequipmentconstructionaccordingtorequirementsofdesignandtechnicaldocumentationoftheproduct.Tomodifythedesignorusealternativeequipmentsorthematerials,itshouldbeapprovedbydesignedunits,supervisorandconstructionunits,andthanitcanbeimplemented.

3.1.4Non-standardequipmentconstructionwhichisnotincludedinthispartshallbeinaccordancewiththecontractagreementordesignrequirements.Forimportedequipment,weshouldformulatetechnicalmeasuresforconstructionaccordingtothecontractagreementorrelevanttechnicalrequirements.

3.1.5Orderingcompletesetofdevicesshouldsign

technical

agreement

andacceptanceasanattachmentofthecontractandthebasisofconstructionacceptance.

3.1.6ThereareSupervisionandinspectionreportsbeforeinstallingcompletesetofdevices.

3.1.7

Liquid

level

measurement

and

analysis

meter

installationafterrinsthesystemandcleanandqualified.

3.1.8

Drainage

pipeline

ofthecontainershouldbearrangedinthetrench,itsdirectionshouldbethesamewithdraindirections.

3.1.9Dosingroomshouldbeequippedwiththerinsewater.

3.1.10Storingor

conveAniong

equipment

foracid-basemediaaswellassystemsoperationmuststrictlyobservethesafetyrules.

3.1.11Storage,handlingandinstallationofstainlesssteelpipesandpipefittingsshouldnotbecontactwiththeferritematerials,betweenthestainlesssteelpipeandcarbonsteelhangershouldbeSeparatedwithStainlesssteelskinorlessthan50mg/kgofnon-metallicgaskets.

3.1.12Frameinstallationqualityofultrafiltration,reverseosmosis,electrodeionizationdevicesshouldcomplywith

relevant

regulation

ofGB50205CodeforAcceptanceofConstructionQualityofSteelStructures.

3.2Constructionengineering

3.2.1

Beforeequipment

installation

intoplace,theconstructionunitorsupervisionunitshouldorganizeinstallationwork,thecontractorscheckconstructionprojectwiththem,meetthefollowingrequirements:

1Geometricdimensioning,locationandelevationofequipmentfoundationsshouldmeetthedesignrequirements.

2Geometricdimensioning,locationandelevationofembeddedinsertandreserveholesshouldmeetthedesignrequirements.

3Asphaltsandcushionshouldbepavedonthefoundationoftheflatbottomtank,thedirectionandgradientofslopeshouldmeetthedesignrequirementsorrelevantprovisionsofGB50128Codeforconstructionandacceptanceofverticalcylindricalsteelweldedstoragetanks.

3.2.2Acceptanceofconcretestructuresinaccordancewithdesigndrawings.Acceptanceofanti-corrosionrequirementsofreinforcedconcretestructuresandbuildingsshouldbeinaccordancewithDL5190.1Technicalspecificationforthermalpowererectionandconstruction-Part1:CivilEngineering,GB50212Specificationforconstructionandacceptanceofanticorrosiveengineeringofbuildings,GB50224Codeforacceptanceofconstructionqualityofanticorrosiveengineeringofbuildings.

3.2.3WeshoulddowaterfillingtestforreinforcedconcreteContainers.Beforethetest,theinstallationofpipejointsshallmeetthedesignrequirements,thetimeofwaterfillingtestisnotlessthan24h,thereshouldbenoleakage.Installationofequipmentandpipingcanbecarriedoutafterpassingthewaterfillingtest.

3.2.4Beforewatertreatmentequipmentoperation,buildingconstructionshouldbecompletedthefollowingtasks:

1Ananti-corrosiongroundofindoorandoutdoorofwatertreatmentroom,anti-corrosionditchandneutralizationtank,wastepondconstructionaccordingtodesignrequirementsandpassacceptanceinspection:drainagetrench,slagdraintrenchtotallyunimpeded:Acompleterangeoftrenchcover,trenchcoverandgroundareinaplane

2Whitewash,paint,floors,platforms,stairs,doors,windowsandlightingofindoorandoutdoorofwatertreatmentroom,theconstructionofthemaccordingtodesignrequirement.

3Thewater,heating,ventilation,lighting,aircondition,powersupplyandexperimenttableoftestroomconstructioninaccordancewithdesignrequirements.

4Structure,corrosionprotection,ventilationandsafetyfacilitiesofacid-basereservoirpoolconstructionworkiscompletedandthenpassacceptanceinspection.

3.2.5Beforeadjustingcommissioningofhydrogenstationequipmentandsystems,buildingandelectricalconstructionshallcomplywiththefollowingProvisions:

1Lightningrod,groundinggridofhydrogenstationconstructionworkiscompletedaccordingtodesignrequirementsandthenpassacceptanceinspection.

2Roads,fencesandgates,doorsandwindowsofHydrogenStationconstructionworkiscompletedaccordingtodesignrequirementsandthenpassacceptanceinspection.

3Thewater,heating,ventilation,lighting,aircondition,powersupplyofhydrogenstationconstructionworkiscompletedaccordingtodesignrequirementsandthenpassacceptanceinspection.

4Safety,firefightingfacilitiespassacceptanceinspection,meetoperatingcondition,acompleterangeofSafetywarningmark.

3.3Inspectionandstorageofequipmentandmaterials

3.3.1

Open-box

inspection

ofequipmentincludesthefollowingcontents:

1Packinglist,certificateofproductquality,CertificateofApproval,generaldrawingofproduct,theproductinstructionsandotherrandomfileshouldbecomplete.

2Productqualitycertificateincludesthemainpressurepartsmaterialwarrantybook,hydrostatictestreports,forequipmentofNDTrequirements,thereshouldhaveweldjointNDTreports.

3Accordingtolists,checkquantity,specifications,packagingandappearanceofthematerialsandequipments,andmake

open-box

inspection

records.Ifthereiscorrosion,cracking,deterioration,damageandotherdefectsequipmentormaterials,itshouldbeanalyzethecauseswithrelevantunits,findouttheresponsibilityanddealwiththeseissuestimely.

3.3.2StorageofmaterialsandequipmentsinaccordancewiththeregulationsofDL/T855-Thecodeformaintenanceandsafekeepingofthermalpowerequipmentinelectricpowerconstructionandrequirementsofthetechnicaldocumentationofproducts.

3.3.3Anticorrosiveequipmentandmaterialstransporttotheconstructionsite,do

appearance

inspection

andleakagetestinspection,anditshallmeetthefollowingrequirements:

1Aliningmaterialsanditsthicknessshallmeetthedesignrequirements.

2Therearenofloatingandhollowingforanticorrosivecoating.

3Dotheleakagetestforallanticorrosivecoatingwithhigh-frequencysparkdetector,itshouldnotproducespark.Detectionprobestayatanyonelocationarenottoolongtime,thespeedofdetectionprobeis3m/min~6m/min.thevoltageseeTable3.3.3.

Table3.3.3Theleakagetestforvoltagecheckofanticorrosivecoating

Anticorrosivecoatingmaterials

Theleakagetestforvoltagecheck

Rubberlining

Slab

rubber

3KV/mm

Liningplastic

Steelpipeconnectedcathode,

positive

pole

connectedliningplasticlayer,Lowestleakdetection

voltage

U=7843,

U-minimumvoltagefordetection,V

T-Thicknessofliningplasticlayer

Glass

fiber

reinforced

plastics

Checkingvoltage3KV--3.5KV

Others

Checkingvoltageshouldbemeetdesignrequirement:therearenorequirements,thethicknessofcoatingmultiplyby5V/um

4Qualitydefectsarefound,dealwithitaccordingtothecontract,aftertreatmentshouldbetestedagain,afterqualifiedforinstallation.

3.3.4Specialmaterialsforwatertreatmentandpotionwhichtransporttosite,andthendosamplinginspection,thequalityshouldmeetthetechnicalrequirementsandtherelevantprovisions,Storethembycategory,safekeeping.

3.4Leaktestsofequipmentandsystem

3.4.1Afterinstallationofvarioustypesofpipesandequipmentiscomplete,Testpressureofsteelpipes,testmethodsand

announcements

shouldbeinaccordancewithrelevantregulationsofDL5190.5-ThespecificationoferectionofelectricpowerconstructionPart5:Pipingandsystem.

3.4.2Rubberlining,liningplastic,

glass

fiber

reinforced

plastics

,plasticsandothernon-metallicmaterialsteelpipe,thepressureofleaktestisratedworkingpressure.Differentratedworkingpressureequipment,pipinginstalledinthesamesystem,doleaktesaccordingtoratedworkingpressureofthelowestratedworkingpressureofequipmentorpipesinthesystem.Whentheworkingpressureisambiguous,powerequipmentheadcanberegardedastheworkingpressure.

3.4.3Leaktestofstainlesssteelpipingwithcleanwater,itschlorideioncontentbelessthan25mg/L.

3.4.4Ionexchange,regenerationdevicesofwatertreatment,afterinstallation,itshoulddo

hydrostatic

test

ofsingleworkingpressure.

Singleworkingpressureshouldbecompletedafterthehydrostatictest.

3.4.5Pressure-bearingequipmentaccordingtorelevantprovisionsofTSGR0004-SupervisionRegulationonSafetyTechnologyforStationaryPressureVesselpressurevesselpressuretest.Ifthereiscertificateofhydrostatictestqualified,thistestcannotbedo,butweshoulddoleaktestofpipewhichconnectedwithpressure-bearingequipment

3.4.6Dowaterfillingtestfor

normal

pressure

vessel

,itshouldbeensurethatitdoesnotleak.

normal

pressure

vessel

smadeon-site,allweldingseamof

normal

pressure

vessel

bottomshoulddoleaktestofvacuumboxmethod,negativepressureisnotlessthan53kPa.

3.4.7

Float

bowl

inequipmentandcontainershoulddowaterfillingtesttomakesurethatthefloatbowldoesnotleak.

3.4.8CheckingvesselsandequipmentofconcretestructureshouldbeinaccordancewiththerelevantprovisionsofGB50300-Unifiedstandardforconstructionqualityacceptanceofbuildingengineering

3.4.9Allequipmentsandsystemsshoulddowaterfillingtest,oil-leakagetestorleaktest,afterqualified,wecandoanti-corrosionandinsulationwork.

3.5GreenConstruction

3.5.1Theconsructionshouldbeinaccordancewiththefollowingregulations:

1Optimaltheconstructionprocess,andpromoteenergyconservationandemissionreduction.

2Adoptingnewtechnology,newprocess,newequipments,newmaterials,high-pollutiontechnologyshouldnotbeused.

3Environmentalprotectionandenergysaving,thedevicesandmachineries,andincreasingutilization.

4Recyclingexperimentalwater.

5Wastegeneratedbytheconstructionshouldbeclassifiedanddisposed.

6Prohibittheuseofmaterialsandtechnologiesprohibitedbythestateregulations.

3.5.2WastewaterdischargeofWatertreatment,wastewatertreatmentshallcomplywithIntegratedwastewaterdischargestandardGB8978andlocalpollutantdischargestandard.

3.5.3Prohibittheuseofoverflow,seepagewells,leachingcesspool,wastemine

attenuation

orothermeanstodilutethedischarge

poisonous

andhazardouswastewater.

3.5.4Wasteorsludgefromwaterandwastewaterdisposalshouldbestoredin

specialized

stackingarea

,theyshouldbecomprehensiveutilized.

specialized

stackingareaadoptmeasurestopreventdustandlixivatedwater.

3.5.5Constructionprojectsputintoproductionoruse,atthesametime,environmentalcontrolfacilitiesbeingputintouse.

4Waterpretreatmentequipment

4.1Conventionalequipment

4.1.1Theinstallationofdefecatormeetthefollowingregulations:

1

Steel

catchwaterchannel,afterwaterfillingwatertest,assemblingthosedevices

.Theholeofcatchwaterchannelcenterlineshouldbeatthesamelevel,

allowable

deviation

is2mm.

2catchwaterchanneland

clapboard

shouldbeweldedtight.

3Theinstallationofsamplingtube,valveshallcomplywiththefollowingrequirements:

1)samplingtubeendinsertedintotheinsideofthevesselshouldbedownwarping,verticalinsertiondepthis50mm~100mm.

2)Thetextureofsamplingtubeshallmeetthedesignrequirements.

3)Theelevationofsamplingtubeshouldmeetthedesignrequirements,allowabledeviationis:±10mm

4)Samplingvalvesshouldbearrangedinpositionforeasyoperationandsolidinstallation.

4Installationofcellularinclinedtubeorinclinedboardshallmeetthedesignrequirementsandinagoodorder,clingcloseeachother,notbeloose.Theintervalbetweenthecomponentsshouldnotbelagerthantheporesize.

5Elevationofoverflowpipeandoutletpipeshouldmeetthedesignrequirements,andits

allowable

deviation

is±5mm.

4.1.2ladderofclarifiershouldbefullweldedandittreatedwithpreservatives.

4.1.3Inflowdistributionboxofclarifier,its

allowable

height

deviation

ofneighbouring

crest

of

weir

is5mm.

4.1.4Filterwithwatervalvebonnet,checkingitsgapsandcompletenessbeforeyoucaninstallit,watervalvebonnetshouldbetightenedwhenitisinstalled,Wheninstalled,waterspraytestshouldbedone,thewatervalvebonnetwon'tcomeoffordamaged.

4.1.5Physicalandchemicalproperties,gradation,particlesize,uniformitycoefficientoffiltermaterialsandthegradedgravellayertextureshouldmeetthedesignrequirements.Nodesignrequirements,itshallmeettheprovisionsofAppendixofthispart.

4.1.6Whenthefilterisinstalled,Measuringequipmentcenterisbasedontheoutletflangecenter,

allowable

deviation

is10mm;theelevationoffilterisbasedoninflowflangecenter,its

allowable

deviation

is10mm,itsverticaldeviationisnotmorethan0.25%ofdeviceheight.

4.1.7Airseparatorinstallationshallmeetthefollowingregulations:

1Thecenterandelevationofairseparatorshouldmeetthedesignrequirements,allowabledeviationofverticaldegreeforshellisitsheightof0.4%,andthemaximumdeviationis20mm.

2allowabledeviationbetweenseparatorcenterlineoftheoriginalpipecenterextendedintotheairandcenterlineofairseparatoris5mm,

horizontal

andallowabledeviationupperedgeofthe

water

pond

is2mm.

4.1.8Suspendingclarifierinstallationshallmeetthefollowingrequirements:

1Thegapbetweensupportringand

foundation

shouldbe30mm~40mm.Thesupportringshouldbehorizontal,allowabledeviationis0.1%ofitsdiameter,andthemaximumdeviationis5mm.

2verticalandallowabledeviationofitsshellis0.25%ofthedevice,andthemaximumdeviationis5mm.

3Thecenterlineoftheuppercatchwaterchannel,theinnercylinderandtheinnercylindertubethatcollectedslagshouldbeonthesameaxis,theallowabledeviationis0.5%ofitsshelldiameter,andthemaximumdeviationis20mm.

4Internalhorizontalandverticalsteadyflowplateweldingshouldbefirm,aperturepitch-rowshouldmeettheprovisionsofthedesigndrawings,edgeoftheholeshouldbesmooth.

5Machiningdimensionsoftaperedpartforinletnozzleshouldmeetthedesignrequirements,theinternalsurfaceshouldbesmoothandclean.Whenitisinstalled,thenozzleandthecasingshouldbelevel.Twonozzlesareparalleltoeachother

andbeperpendiculartothetaperedpartoftheclarifier.

6Attachmentbracketofinnerandoutertubeshouldbeweldedsecurely.Theholeof

internal

cylinder

andtaperedpartshouldnotleak.

7Theupperorloweredgesoftheinnercylinderareparalleltoeachother,theedgeoftheholeshouldbesmooth.

8Experimentalwaterofclarifier

water

filling

test

shouldbeflowinto

internal

cylinder

andthen

outer

cylinder

4.1.9Installationofclarifiershallmeetthefollowingregulations:

1Circulatorclarifier

1)verticalcenterlineallowabledeviationofReactionchamberis0.25%ofthediameterofclarificationtank,Centerlineallowabledeviationof

hollow

throat

,nozzlesis0.5%ofthereactionchamber

inner

diameter

,flaredpipeovalityofthereactionchambershouldbenomorethan1%,perpendicularityofreactionchamber,levelnessshouldmeetthedesignrequirements.

2)Thenozzlesizeshouldmeetthedesignrequirements,theinnersurfaceshouldbesmooth.

Allowable

deviation

ofnozzleand

hollow

throat

centerlineis3mm.

3)Verticalslidebaofhollowthroatisinstalledaftertakingnozzle,hollowthroatandriserinplace,hollowthroatslidesupanddowneasily.

2Mechanicalstirringclarifier:

1)Thefirstreactionchamber,asecondchamberandthecenterlineoftheclarifieris0.25%oftheclarificationtankdiameter.

2)Theinstallationforbearingofmechanicalstirringdevicesandtransmissionpartsis

on

the

basis

of

therelevantregulationofDL5190.2-Technicalspecificationforthermalpowererectionandconstruction-Part2:boilerunit.

3)Forspindlecenterlineofstirringdeviceandthecenterlineofsecondreactionchamber,theirallowabledeviationis0.5%ofthesecondreactionchamberdiameter.

4)Processingsizeofpulpboardandconnectingangleshallmeetthedesignrequirements.

5)Setting

slushing

equipment

placeandhollowthroatangleofimpellerregulatorbottom

6)Insertedheightatthebottomofchemicalfeedpipe,sludgethickeningcone,blowdownpipeand

clarification

tank

shouldmeetthedesignrequirements.

7)Thedistancebetweenthe

scraping

fender

andthe

bottom

of

the

pool

shouldmeetthedesignrequirements,ifnorequirement,itshouldnotbelessthan5mm,allowabledeviationis+4mm.

8)Thelevelnessoftheumbrellaboardshouldmeetthedesignrequirements.

4.1.10Filterinstallationshouldmeetthefollowingrequirements:

1Theelevationofauxiliary

pipe

orifice

,filteroutlet,

crest

of

weir

ofinlet,thebottomofinletpipedistributionbox,thebottomoftheu-shapedpipeaccordingtothedesigndrawingsor

standard

drawing

forconstruction,itsallowabledeviationis±10mm.

2Waterfenderthatunderthefiltercovershouldremainlevel,itsallowabledeviationis±2mm.

3Wheninstallingsiphonauxiliarypipe,itshouldnotbeusesquareelbow,

pipe

orifice

shouldbeinsertedintothesiphonelbow.bleedingpipeorificethatonthetopofsiphonbendshouldbeinsertedintosiphonpipeabout10--20mm.

415°inclinedtubeusedforflushingconstructionshouldbefollowdesigndrawingsor

standard

schematic

handbook

,allowabledeviationof

inclind

tube

is2degrees.Inclinedpipeorificeshouldclosetotheexhaustpipe,theinstallationofthemshouldbeonthesamesideofthesiphontube.

5siphonpipe,LiquidIndicator,siphonauxiliarypipe,exhaustpipe,siphontubeshouldnotleak.

6Thebackwashingintensityadjustmentboardshouldbeeasytoadjustandflexible.

4.1.11filterinstallationshouldmeetthefollowingrequirements:

1Mechanicalfilter:

1)Thefiltershouldbeinstalledvertically,verticalallowabledeviationofshellis0.25%ofitsheight,andthemaximumdeviationis5rnm,shellupright,thenweldingsupportingfoot,padironwithPre-buried

pipe

fitting

firmlyandgoingonsecondarygrouting.

2)ThecenterlinebetweenmainandbranchpipeofFilterthewaterdistributionsystem,drainagesystemandairdistributionsystemsshouldbeperpendiculartoeachother,thelevelallowabledeviationofthebranchpipeis±2rnm.

3)Thecenterlineofdraincapseatperpendiculartothe

horizontal

plane

ofbranchpipe,alldraincapshavethesameheight,allowabledeviationis±3mm,thespacebetweendraincapsaswellasthespacebetweendraincapandbottomplateofcontainershouldmeetthedesignrequirements,andsolidinstallation.

4)Filterusesmainpipeandbranchpipetypeof

water

distribution

system

,pipeholeshouldbesmooth.Meshofbranchpipeshouldmeetthedesignrequirementsandsolidlashing.

5)Thereisairswagingdeviceinfiltermechanicalfilter,theupperplanofcushionatthebottomofitandeyeletorstrainerareonthesameplan

6)Whenthereis

anticorrosive

coating

insideoffiltershell,beforefillingmaterials,weshouldcheckthequalityof

anticorrosive

coating

accordingtotheprovisionsofarticle3.3.3.

7)Filledwithactivatedcarbonorfiltersofother

fragile

filter

material

sforreverseosmosissystem,thecushionatthebottomofitshallcomplywithAppendixAofthispart.

2Fabricfilter

1)Installingfabricfiltershallconformtoprovisions