filter

Historyofdevelopment

InancientChina,filtrationtechnologywasusedinproduction,andpapermadeofplantfiberswasalreadyavailablein200BC.In105AD,CaiLunimprovedthepapermakingmethod.Duringthepapermakingprocess,hedippedplantfiberpulpondensethinbamboocurtains.Thewaterisfilteredthroughthegapsofthebamboocurtain,andathinlayerofwetpaperpulpisleftonthesurfaceofthebamboocurtain,anditbecomespaperwhenitdries.

Theearliestfiltrationwasmostlygravityfiltration.Later,pressurefiltrationwasusedtoincreasethefiltrationspeed,andthenvacuumfiltrationappeared.Therotarydrumvacuumfilterinventedatthebeginningofthe20thcenturyrealizedthecontinuityofthefiltrationoperation.Sincethen,varioustypesofcontinuousfiltershaveappearedoneafteranother.Intermittentlyoperatedfilters(suchasplateandframefilterpresses,etc.)havebeendevelopedbecausetheycanrealizeautomatedoperation,andthefilteringareaisgettinglargerandlarger.Inordertoobtainfilterresiduewithlowmoisturecontent,mechanicallypressedfiltershavebeendeveloped.

Workingprinciple

Filter(26photos)

Whenthefilterisworking,thewatertobefilteredentersthroughthenozzleandflowsthroughthefilterscreen,Throughtheoutlettoenterthepipelinerequiredbytheuserforprocesscirculation,theparticulateimpuritiesinthewateraretrappedinsidethefilter.Withsuchacontinuouscycle,moreandmoreparticlesareintercepted,andthefilteringspeedisslowerandslower.However,theimportedsewageisstillcontinuouslyentering,andthefilterholeswillbecomesmallerandsmaller,therebycreatingpressurebetweentheinletandtheoutlet.Whenthelargedifferencereachesthesetvalue,thedifferentialpressuretransmittertransmitstheelectricalsignaltothecontroller,andthecontrolsystemstartsthedrivemotortodrivetheshafttorotatethroughthetransmissionassembly.Atthesametime,thesewageoutletisopenedanddischargedfromthesewageoutlet.Aftercleaning,thepressuredifferencedropstotheminimumvalue,thesystemreturnstotheinitialfilteringstate,andthesystemoperatesnormally.Thefilterconsistsofahousing,amulti-elementfilterelement,abackwashmechanism,andadifferentialpressurecontroller.Thetransversepartitionintheshelldividestheinnercavityintoupperandlowercavities,andtheuppercavityisequippedwithmultiplefilterelements,whichmakesthefilterspacesufficientandsignificantlyreducesthevolumeofthefilter.ThelowercavityisequippedwithbackwashingSucker.Whenworking,theturbidliquidentersthelowercavityofthefilterthroughtheinlet,andthenenterstheinnercavityofthefilterelementthroughthepartitionhole.Theimpuritieslargerthanthegapofthefilterelementareintercepted,andthecleanliquidpassesthroughthegaptotheuppercavity,andisfinallysentoutfromtheoutlet.Thefilteradoptsahigh-strengthwedge-shapedfilterscreen,whichautomaticallycleansthefilterelementthroughpressuredifferencecontrolandtimingcontrol.Whenimpuritiesinthefilteraccumulateonthesurfaceofthefilterelementandcausethepressuredifferencebetweentheinletandoutlettoincreasetothesetvalue,orthetimerreachesthepresettime,theelectriccontrolboxsendsasignaltodrivethebackwashingmechanism.Whenthebackwashsuctioncupportisdirectlyoppositetothefilterelementinlet,thedrainvalveisopened,andthesystemdischargespressureatthistime.Anegativepressurezoneappearsontheinsideofthesuctioncupandthefilterelementwhoserelativepressureislowerthanthewaterpressureontheoutsideofthefilterelement,forcingpartofthenetcirculatingwaterfromtheoutsideofthefilterelement.Flowingintotheinnersideofthefilterelement,theimpurityparticlesadsorbedontheinnerwallofthefilterelementflowintothedrumwithwaterandaredischargedfromthedrainvalve.Thespeciallydesignedfilterscreenproducesasprayeffectinsidethefilterelement,andanyimpuritieswillbewashedawayfromthesmoothinnerwall.Whenthepressuredifferencebetweentheinletandoutletofthefilterreturnstonormalorthetimersettingtimeisover,thematerialflowscontinuouslyduringthewholeprocess,andthebackwashingconsumeslesswater,realizingcontinuousandautomatedproduction.Filtersarewidelyusedinthefieldsofmetallurgy,chemicalindustry,petroleum,papermaking,medicine,food,mining,electricpower,andurbanwatersupply.Suchasindustrialwastewater,circulatingwaterfiltration,emulsionregeneration,wasteoilfiltrationtreatment,continuouscastingwatersysteminthemetallurgicalindustry,blastfurnacewatersystem,high-pressurewaterdescalingsystemforhotrolling.Itisanadvanced,efficientandeasy-to-operateautomaticfilterdevice.

Thewatertobetreatedbythefilterentersthebodythroughthewaterinlet,andtheimpuritiesinthewateraredepositedonthestainlesssteelfilterscreen,resultinginapressuredifference.Thepressuredifferencebetweentheinletandoutletismonitoredbythepressuredifferenceswitch.Whenthepressuredifferencereachesthesetvalue,theelectroniccontrollerfeedsthehydrauliccontrolvalveanddrivesthemotorsignal.Aftertheequipmentisinstalled,thetechnicianswilldebugandsetthefiltertimeandcleaningconversiontime.Thewatertobetreatedentersthebodyfromthewaterinlet,andthefilterstartstoworknormally.Whenthepresetcleaningtimeisreached,theelectriccontrollerwillgivethehydrauliccontrolvalve,Drivethemotorsignal,triggerthefollowingactions:themotordrivesthebrushtorotatetocleanthefilterelement,whilethecontrolvalveopenstodischargethesewage.Theentirecleaningprocessonlylastsfortensofseconds.Whenthecleaningisover,thecontrolvalveisclosedandthemotorstopsrotating.Thesystemreturnstoitsinitialstateandbeginstoenterthenextfiltrationprocess.Theinsideofthefilterhousingismainlycomposedofcoarsefilterscreen,finefilterscreen,suctionpipe,stainlesssteelbrushorstainlesssteelsuctionnozzle,sealingring,anti-corrosioncoating,rotatingshaftandsoon.

Filter(10sheets)

Usefiltermediatodividethecontainerintoupperandlowerchamberstoformasimplefilter.Suspensionisaddedtotheuppercavity,andentersthelowercavitythroughthefiltermediumunderpressuretobecomefiltrate.Thesolidparticlesaretrappedonthesurfaceofthefiltermediumtoformfilterresidue(orfiltercake).Duringthefiltrationprocess,thefilterresiduelayeronthesurfaceofthefiltermediumgraduallythickens,theresistanceoftheliquidthroughthefilterresiduelayerincreasesandthefiltrationspeeddecreases.Whenthefilterchamberisfulloffilterresidueorthefilteringspeedistoolow,stopfiltering,removethefilterresidue,andregeneratethefiltermediumtocompleteafiltrationcycle.

Theliquidmustovercometheresistancetopassthroughthefilterresiduelayerandthefiltermedium,sotheremustbeapressuredifferenceonbothsidesofthefiltermedium,whichisthedrivingforceforfiltering.Increasingthepressuredifferencecanspeedupthefiltration,butthedeformedparticlesunderpressurewilleasilyblocktheporesofthefiltermediumwhenthepressuredifferenceislarge,andthefiltrationwillslowdowninstead.

Suspensionfiltrationhasthreemethods:filterresiduelayerfiltration,deeplayerfiltrationandsievingfiltration.

①Filterresiduelayer:thefiltermediumcanonlyretainlargesolidparticlesintheinitialstageoffiltration,andsmallparticlespassthroughthefiltermediumwiththefiltrate.Aftertheinitialfilterresiduelayerisformed,thefilterresiduelayerplaysamajorroleinfiltering.Atthistime,bothlargeandsmallparticlesareretained,suchasthefiltrationofaplateandframefilterpress.

②Deepfiltration:thefiltermediumisthicker,thesuspensioncontainslesssolidparticles,andtheparticlesaresmallerthantheporesofthefiltermedium.Whenfiltering,theparticlesareadsorbedintheporesafterentering,suchasthefiltrationofporousplastictubefiltersandsandfilters.

③Screening:Thesolidparticlestrappedbyfiltrationarelargerthantheporesofthefiltermedium,andtheinsideofthefiltermediumdoesnotabsorbsolidparticles.Forexample,arotatingdrumfilterscreenfiltersoutcoarseparticlesinsewage.Intheactualfiltrationprocess,thethreemethodsoftenappearsimultaneouslyoroneafteranother.

Filtrationspeed

Whenthesolidparticlesinthesuspensionarelargeandtheparticlesizeisuniform,theporesofthefilteredfilterresiduelayerarerelativelyunobstructed,andthefiltratepassesthroughthefilterresiduelayeratahigherspeed.Theapplicationofcoagulanttogatherthefineparticlesintolargeragglomeratesisbeneficialtoincreasethefiltrationspeed.

Forsuspensionswithfastsolidparticlessettlingspeed,applyafilterthatfeedsonthetopofthefiltermediumtomakethefiltrationdirectionconsistentwiththedirectionofgravity.Thecoarseparticlessettlefirst,whichcanreducethecloggingofthefiltermediumandthefilterresiduelayer;Mixingcoarsesolidparticlessuchasdiatomaceousearth,expandedperlite,etc.intothedifficult-to-filtersuspension(suchascolloid)canmakethefilterresiduelayerloose;whenthefiltratehasahighviscosity,thesuspensioncanbeheatedtoreducetheviscosity.Thesemeasurescanspeedupthefiltrationspeed.

Performancecharacteristics

1.High-efficiencyandprecisefiltration:Specialstructureoffilterdiscfiltrationtechnology,preciseandsensitiveperformance,toensurethatonlyparticlessmallerthantherequiredparticlesizecanenterthesystem,whichisthemosteffectiveThefiltrationsystem;thespecificationsare5μ,10μ,20μ,55μ,100μ,130μ,200μ,etc.,userscanchoosedifferentprecisionfilterdiscsaccordingtothewaterrequirements.Thesystemflowcanbeflexiblyadjustedaccordingtoneeds.

2.Standardmodularity,savingspace:Thesystemisbasedonastandarddiscfilterunit,accordingtomodulardesign,userscanchooseaccordingtotheirneeds,flexibleandchangeable,stronginterchangeability.Thesystemiscompactandoccupiesaverysmallarea.Thecornerspacecanbeflexiblyusedforinstallation.Forexample,theequipmentwithaprocessingwatervolumeofabout300m3/hoccupiesonlyabout6m2(generalwaterquality,filtrationlevel100μ).

3.Fullyautomaticoperation,continuouswaterdischarge:betweeneachunitinthefiltercombination,thebackwashingprocessalternatesalternately,andtheworkingandbackwashingstatesareautomaticallyswitchedtoensurecontinuouswaterdischarge;Thewashingwaterconsumptionisverysmall,accountingforonly0.5%ofthewateroutput;ifcombinedwithair-assistedbackwashing,theself-consumptionwatercanbereducedtolessthan0.2%.High-speedandthoroughbackwashingcanbecompletedintensofseconds.

4.Longlife:thenewplasticfilterelementissturdy,non-wearing,non-corrosive,andminimallyfouling.Afteryearsofindustrialpracticalverification,After6to10yearsofuse,thereisnowearandnoaging,andthefilteringandbackwashingeffectswillnotdeteriorateduetotheusetime.

5.Highquality,lowmaintenance:Productsmeetthecorrespondingqualitystandards,allproductsaretestedandrunundersimulatedworkingconditionsbeforeleavingthefactory,nospecialtoolsarerequired,andfewparts;easytouse,Onlyneedregularinspection,almostnodailymaintenance.

Classification

Mainclassification

Thefilterisdividedintothreetypes:gravityfilter,vacuumfilterandpressurefilteraccordingtodifferentmethodsofobtainingthedrivingforceoffiltration.kind.

Gravity

Thepressureformedonthefiltermediumwiththeaidofthegravityandthepositiondifferenceofthesuspensionisusedasthedrivingforceforthefiltration,generallyintermittentoperation,suchassandDevice.

Vacuum

Anegativepressureisformedattheoutletofthefiltrateasthedrivingforceforfiltration.Theabsolutepressureoftheoperatingvacuumoftheindustrialvacuumfilteris(2.5～8.0)×105Pa.Thetemperatureofthesuspensionduringfiltrationshouldbelowerthanthevaporizationtemperatureofthefiltrateundertheoperatingvacuum.Thisfilterisdividedintobatchoperationandcontinuousoperation.Theintermittentlyoperatedvacuumfiltercanfiltersuspensionsofvariousconcentrations.Thevacuumfilterisfilledwithsuspensioninthecontainershell.Thefilterleafwrappedwithfilterclothonbothsidesisimmersedinthesuspension,andtheinnercavityofthefilterleafisconnectedwiththevacuumsystem.Afterthefiltrateissuckedout,itisledoutbythepipe,andthefilterresidueaccumulatedonthesurfaceofthefilterleafisremovedaftertheshutdown.Continuouslyoperatedvacuumfiltersaresuitableforfilteringthicksuspensionscontainingmoresolidparticles.Theworkingprinciplesoftherotarydrumvacuumfilter,theinnerfiltersurfacerotarydrumvacuumfilter,thediscvacuumfilterandthetippingbucketvacuumfilteraresimilar.Theentirefiltersurfaceisdividedintoapluralityofseparatedfilterchambers,andeachrotatingfilterchamberissequentiallyconnectedwitheachfixedpipethroughadistributionvalvetosuckoutthefiltrateandlotioninthefilterchamber,orsendcompressedair.Eachfilterchamberrotatesonecircletocompletethewholeprocessoffilteringoperation,andtheoperationsofmultiplefilterchambersareconnectedtoformcontinuousfiltration.Thestructureofthebeltvacuumfilterissimilartothatofthebeltconveyor,withacontinuousfilterbeltsuitableforeasy-to-filtersuspensions.Thebeltvacuumfilter,theinnerfiltersurfacedrumvacuumfilterandthetippingbucketvacuumfilterareallfedonthetopofthefiltermedium(filtercloth),whichisespeciallysuitableforthesuspensionofsolidparticleswithhighdensityandfastsedimentation.

Pressure

Itusesthepressureappliedattheinletofthesuspensionorthemechanicalsqueezingforceappliedtothewetmaterialasthefilteringdrivingforce,whichissuitableforrequirementsFiltrationofsuspensionswithlargepressuredifferencesisalsodividedintotwotypes:batchoperationandcontinuousoperation.Intermittentlyoperatedtube-and-tubefilterandpressurefilterareusedforfiltrationoflow-concentrationsuspensions.Thefilterisalsoakindofintermittentlyoperatedpressurefilter,whichisdividedintothreetypes:plateandframetype,boxtypeandverticaltype,andhasawiderangeofuses.Theoilfilterisaplateandframefilterpressunitequippedwithaccessoriessuchasanoilpumpandavacuumevaporator.Continuouslyoperatedrotarydrumpressurefilteranddiscpressurefilterperformpressurefiltrationinaclosedshell,andtheirstructureissimilartorotarydrumvacuumfilteranddiscvacuumfilter.Duetothecomplexstructure,therearefewerapplications.

Commonlyusedpressurefiltrationistousethevolumeofthefilterchambertobecomesmallerorapplymechanicalsqueezingforcetofilter.Thefilterresiduehasalowmoisturecontentandissuitableforsuspensionswithahighconcentrationofsolidparticles.Inthebeltsqueezefilter,thewetfilterresidue,whichhasbeeninitiallydeliquoredbygravityorvacuum,movesbetweentwofilterbelts,andisthensqueezedanddeliquoredbyrollers.Thescrewpressfilterhasacylinderwithpores,inwhichthereisarotatingspiral.Thedepthofthespiralgrooveisdifferent.Thematerialisaddedfromthedeepgrooveendtotheshallowgrooveend.Thespaceofthefilterchamberisgraduallyreduced.Thematerialissqueezed,andthefiltrateflowsfromthecylinder.Theporesaredischarged,andthefilterresidueisdischargedfromthesmallend.

Precision

Precisionfiltersareaimedatfiltrationaccuracy,generallybetweensandfiltration(coarsefiltration)andultrafiltration.Undertheactionofpressure,therawwaterpassesthroughthefilterelement,theimpuritiesaretrappedonthewallofthefilterelement,andthewaterflowsoutthroughthefilterelementtoachievethepurposeoffiltration.Thescaleofmanufacturersoffilterequipmentinmycountryismainlysmallandmedium-sizedenterprises.Theproductadoptshigh-qualitystainlesssteel,hardpolyvinylchloride,engineeringplastics,organicglassandothercorrosion-resistantmaterialsastheoutershell,mainlyhigh-qualitystainlesssteel,withbuilt-infilterelementsofdifferentmedia.Thebuilt-infilterelementsincludePEcore,honeycombcore,foldingcore,titaniumtubesinteredcore,activatedcarboncore,ceramiccore,polypropylenefiberfiltercore,etc.Differentfilterelementshavedifferentfilteringeffects,sotheprecisionfiltercanremovesuspendedsolids,somecolloidalsubstancesandfineparticlesinthewateraccordingtotherawwaterquality,effluentqualityandwatervolumerequirementstoachievedifferentfilteringaccuracy.Thefiltrationaccuracyofprecisionfiltersonthemarketrangesfrom0.2-100um.Precisionfiltersareoftenusedasprotectivefiltersforelectrodialysis,ionexchange,reverseosmosis,ultrafiltrationandotherdevices.Theycanbeappliedtowatertreatmentinfood,wine,pharmaceutical,chemical,andelectronicsindustries,suchas:

Foodindustry:Finefiltrationofmineralwater,clarificationandfiltrationofbeveragesandalcohol.Pharmaceuticalindustry:watertreatmentofsterilewater,oralliquid,infusion,injection,etc.;

Electronicindustry:purewaterpreparationandwashingwaterfiltrationinsemiconductor,instrument,picturetubeandothermanufacturingplants;

Chemicalindustry:purificationoforganicsolvents,esters,alcohols,acids,alkalisandotherchemicalrawmaterials,oils;

Environmentalprotection:treatmentofelectroplatingwastewater,printingwastewater,pharmaceuticalwastewaterandotherindustrialwastewater.Waterqualitytreatmentfordesalinationofseawaterandbrackishwater,watersupplytreatmentforhotelsandapartments,etc.;

Gardenandgardening:parks,yards,greenhouses,animalhusbandry,industrialplaceswheresuperfinewatermistneedstobeartificiallyproduced,andhigh-endIrrigationandmaintenanceofflowers.

Performanceclassification

Linefilter

Doublecylinderfilter

Highpressurefilter

AsmentionedaboveItshouldbeameshfilter.Infact,therearemanykindsoffilters,suchaslaminatedfilters,sandrodfilters,carbonfilters,plateandframefilters,activatedcarbonfilters,diatomaceousearthfilters,microporousfilters,etc.Themainprincipleistousetheporesizeofthefiltermediumtotrapsubstancessmallerthantheporesizeofthemedium.Ofcourse,somefiltermediaalsohavespecialeffectssuchasadsorption.Mostfiltersarenotsotroublesometobackwash,aslongascleanwaterisusedtointroducethemediuminthereversebackwashfilterfromtheendofthefilteredwatertoachieveagoodbackwasheffect.

Industryclassification

Hydraulicoilfilters:mainlyusedintheoilfiltrationindustry,includingsuctionfilters,returnoilfilters,pipelinefilters,etc.

Foodfilters:dustfilters,airfilters,air-conditioningfilters.

Medicinefilters:liquidmedicinefilters,breathingfilters,bloodfilters,bacteriafilters.

Functionalclassification

Self-cleaning

Itisafilterthatdirectlyinterceptsimpuritiesinthewater,removessuspendedsolids,Particles,reduceturbidity,purifywaterquality,reducesystemdirt,bacteria,algae,rust,etc.,topurifywaterqualityandprotecttheprecisionequipmentofotherequipmentinthesystem.

Themaincomponentsare:motor,electriccontrolbox,controlpipeline,mainpipeassembly,filterelementassembly,316Lstainlesssteelbrush,frameassembly,driveshaft,inletandoutletconnectingflanges,etc.

Overcomemanyshortcomingsofthefilterproduct,suchassmalldirtholdingcapacity,easytobeblockedbydirt,thefilteringpartneedstobedisassembledandcleaned,andthefilterstatuscannotbemonitored.Ithastheabilitytofiltertherawwaterandautomaticallycleanthefilterelement.Function.Thesystemprovidesuninterruptedwatersupplyduringcleaninganddrainage,andcanmonitortheworkingstatusofthefilterwithahighdegreeofautomation.Itcoverstherequirementsofvariousfilteringprecisionsfrom10umto3000um.Adoptingadvancedequipmentintheinternationalwatertreatmentindustry,itcanbeinstalledatanypositioninanydirection,vertically,horizontally,andupsidedown.Itcanbeusedinindustries,agriculture,municipalpower,electronics,medicine,food,printinganddyeing,construction,steel,metallurgy,papermaking,etc.Industrialwaterfiltration.

Automatic

Automaticfilter(8sheets)

isasetofwidelyusedfiltersintheindustryEquipment,traditionalfilterproductshavesmalldirtholdingcapacity,areeasytobeblockedbydirt,filterpartsneedtobedisassembledandcleaned,andcannotmonitorthefilterstatus.Manyshortcomingsareovercome.Ithasthefunctionoffilteringrawwaterandautomaticallycleaninganddischargingthefilterelement.Itconsistsofashell,amulti-elementfilterelement,abackwashmechanism,anelectriccontrolbox,areducer,anelectricvalveandadifferentialpressurecontroller.Thetransversepartitionintheshelldividestheinnercavityintoupperandlowercavities.Theuppercavityisequippedwithmultiplefilterelements,whichutilizesthefilteringspaceandsignificantlyreducesthefiltervolume.Abackwashsuctioncupisinstalledinthelowercavity.Whenworking,theturbidliquidentersthelowercavityofthefilterthroughtheinlet,andthenenterstheinnercavityofthefilterelementthroughthepartitionholes.Theimpuritieslargerthanthegapofthefilterelementareintercepted,andthenetliquidpassesthroughthegaptotheuppercavity,andisfinallysentoutfromtheoutlet.

Advantages:Theautomaticfilterprecisionis100micronsbydefault,andcanbeselectedfrom10to3000microns.Thefilterareaislargeandthedirtholdingcapacityishigh.Theusercancustomizeitaccordingtotheactualworkingconditions.Thecleaningmethodissimple,andthecleaningcycleiselectronicallymonitored,whichcanrealizeautomaticcleaningandsewagedischarge.Allparametersintheautomaticself-cleaningfiltercontrolsystemcanbeadjusted.

Brushtype

Thetypesofstainlesssteelbrushfilterare:automaticstainlesssteelbrushfilter,hand-operatedstainlesssteelbrushfilter.Itsmainfunctionistoremovesuspendedsolidsinthewater,reducetheconcentrationofsuspendedsolidsinthewater,particulatematter,reduceturbidity,purifywaterquality,reducesystemfouling,bacteriaandalgae,rust,andpurifywaterquality.

Thestainlesssteelbrushfilteradoptsapatentedinternalmechanicalstructure,whichrealizesatruehigh-pressurebackwashingfunction,whichcaneasilyandcompletelyremoveimpuritiestrappedbythefilter,cleaningwithoutdeadspots,andwithoutfluxattenuation,Toensurethefiltrationefficiencyandlongservicelife.

Thestainlesssteelbrushfilterrealizesautomaticbackwashingthroughitsownretrievalandstrainfunctions,whichcancopewithunstablewaterqualityfluctuationswithoutmanualintervention.

Duringthebackwashingprocessofthestainlesssteelbrushfilter,each(group)filterscreenissequentiallybackwashed;toensurethatthefilterscreeniscleanedsafelyandefficiently,andotherfiltersarenotaffected,continuetofilter.

Thestainlesssteelbrushfilteradoptsanautomaticdrainvalve,whichhasashortbackwashingtime,lesswaterconsumptionforbackwashing,andisenvironmentallyfriendlyandeconomical.Therearefewwearingparts,noconsumables,lowoperationandmaintenancecosts,andsimpleoperationandmanagement.

Mediaclassification

Accordingtothefiltermedia,itisdividedinto:airfilter,liquidfilter,networkfilter,lightfilter.

Air

Thedevelopmentofairfilters

Andtheuseofrespiratoryprotectionequipment.Accordingtorecords,asearlyasthefirstcenturyinRome,peopleusedhempmasksforprotectionwhentheywerepurifyingmercury.Inthelongtimesincethen,airfiltershavealsomadeprogress,buttheyaremainlyusedasrespiratoryprotectiondevicesinsomedangerousindustries,suchastheproductionofhazardouschemicals.In1827,Browndiscoveredthelawofmovementoftinyparticles,andpeoplehaveabetterunderstandingofthemechanismofairfiltration.

Therapiddevelopmentofairfiltersiscloselyrelatedtothedevelopmentofthemilitaryindustryandtheelectronicsindustry.DuringtheFirstWorldWar,duetotheuseofvariouschemicalpoisons,militarygasmaskswithasbestosfiberfilterpaperasthesmokefilterlayercameintobeing.GlassfiberfiltermediaforairfiltrationwaspatentedintheUnitedStatesinOctober1940.Inthe1950s,theUnitedStatesconductedin-depthresearchontheproductionprocessofglassfiberfilterpaper,whichimprovedanddevelopedairfilters.Inthe1960s,HEPAfilterscameout;inthe1970s,HEPAfiltersusingfineglassfiberfilterpaperasthefiltermediumhaveafiltrationefficiencyof99.9998%forparticleswithaparticlesizeof013microns.Sincethe1980s,withtheemergenceofnewtestmethods,theimprovementofuseevaluation,andtheimprovementoffiltrationperformancerequirements,ithasbeenfoundthatHEPAfiltershaveseriousproblems,sohigherperformanceULPAfiltershavebeenproduced.Countriesarestillstudyinghard,anditisestimatedthatmoreadvancedairfilterswillappearsoon.

Airfilterperformance

Makethepollutedaircleantothestateneededforproductionandlife,thatis,maketheairreachacertaindegreeofcleanliness.Howtheairfilterfilterstheair:

Generalairpurificationequipmentfiltersairroughlydividedintothefollowingmethodsandsteps.

1.Multiplefilters—preventdustandgermsintheairfromenteringtheroom

Multipleactivatedcarbonfilterseffectivelyinterceptdustandgerms,filtertheair,andensurethattheairenterstheroomClean.

2.Titaniumoxidekillspoisons-degradesthepollutionoforganictoxicgasessuchasformaldehydeandbenzeneintheindoorair

Nano-gradetitaniumdioxideisactivatedbyultravioletlighttofiltertheairandeffectivelydegradetheairRadiationpollutionfromorganictoxicgasessuchasformaldehydeandbenzene.

3.Negativeionoxygenation-increasetheoxygenintheindoorairtoanappropriateamountandkeepthecontentstable

ThenegativeiongeneratoraddsoxygentotheindoorairtoensurethattheairenteringthehomeremainssufficientTheamountofoxygen,fullofvitality,strengthenthefiltrationofair>

4.PTCceramicheating-heatingindoorairtoacomfortabletemperature

Performauxiliarypreheatingtoappropriatelyincreasetheindoortemperaturetofiltertheairandmakethehomewarmandcomfortable.

⒌Ultravioletlightsterilization——-stronglykilltheepidemicvirusesandbacteriaintheair

Ultravioletlightsourcecaneffectivelykilltheepidemicvirusesandbacteriaintheair,keepingpeopleawayThesourceofinfectionistofiltertheairtoprotectthehealthofthewholefamily.

Thefilterisanindispensabledeviceonthepipelineoftheconveyingmedium.Itisusuallyinstalledattheinletofapressurereducingvalve,apressurereliefvalve,afixedwaterlevelvalveorotherequipmenttoeliminateimpuritiesinthemedium.Toprotectthenormaluseofvalvesandequipment.Whenthefluidentersthefiltercartridgewithacertainfilterscreen,itsimpuritiesareblocked,andthecleanfiltrateisdischargedfromthefilteroutlet.Whencleaningisneeded,justtakeoutthedetachablefiltercartridgeandreloaditaftertreatment.Yes,therefore,itisextremelyconvenienttouseandmaintain.

High-efficiencyair

High-efficiencyairfilters(8sheets)

High-efficiencyairfiltersaregenerallyusedastheendofthefilterTherefore,therequirementsforhigh-efficiencyfiltersarealsothemoststringent,andthefactoryneedstobetestedonebyone.Astheendofthehigh-efficiencyfilter,itisthemostcriticaloneofthevariouslevelsoffiltersandrequiresadditional"watching".Toprolongtheservicelifeofthehighefficiencyfilter,themostfundamentalwayistoblockthedustinthepre-filter.Thereplacementofthepre-filtergenerallydoesnotrequiresuspensionofproductionordebugging,soexperiencedownerswillpayattentionandmoneytothepre-filter.Forclass10,000andclass100,000cleanworkshops.Pre-filtrationcanchooseF8filter,sothattheservicelifeoftheendhighefficiencyfiltercangenerallyreachfiveyears.Inforeignprojectsanddomesticnewprojects,F8filteristhemostcommonpre-filterfornon-uniformflowcleanrooms.Forcleanworkshopsoflevel100,level10orhigherforchipfactories,thecommonefficiencylevelofthepre-filterisH10,andHEPAissimplyselectedformanynewprojects.Inthedesignofcleanroomair-conditioningsystemsinthepastinChina,thecommonconfigurationoffiltersis:coarseefficiency,mediumefficiencyandhighefficiency.Atthattime,theservicelifeofthehighefficiencyfilterwasonly1-3years,andtheworstwasonlyafewmonths.Itcanbeseenthattheefficiencyofthepre-filterdeterminestheservicelifeoftheendfilter.

Liquid

Liquidfilter(6sheets)

tocleanthecontaminatedliquidtowhatisneededforproductionandlifeState,thatis,maketheliquidreachacertaindegreeofcleanliness.

Themaincommonliquidfiltersare:swimmingpoolintegratedfilteringequipment.

Poolintegratedequipmentisamainstreamproductchoiceinthemodernswimmingpoolindustrymarket.Withitstechnicalcontentanddesignconcept,integratedswimmingpoolequipmenthasbrainstormedanewimpactontheswimmingpoolequipmentmarket.Integratedswimmingpoolequipmentisaswimmingpoolequipmentthatintegratesswimmingpoolfiltration,disinfectionandcirculation,andhasbecomeamainstreamproductintoday'sswimmingpoolequipmentmarket.

Theintegratedswimmingpoolequipmentplaysanirreplaceableroleintheoperationofmodernswimmingpools.Itscharacteristicfunctionhasthefollowingthreepoints:

First,itslocationcanbeplacedneartheswimmingpool,withlownoiseandhighsafetyfactor.

Second,theinstallationissimple,theworkloadisreduced,andtheefficiencyishigh.

Third,itissmallinsizeandburiedintheground,whichcanfreeupaplacetobeautifytheswimmingpool.

Network

Usesettingstoblockspam,sothattheinformationonthecomputerscreenmeetstherequirementsasmuchaspossible.

Light

Theprincipleofsameabsorptionseparateslightofdifferentcolorsandabsorbssomeunwantedlight.

Functionclassification

Suctionfilter

ThefilterisinstalledonthesuctionlineofthepumptofilterouttheresidueinthefueltankThepollutantsthatenterthroughtheairholesofpollutantshavetheeffectofprotectingthepump.However,inordertoavoidthecavitationofthepump,fullattentionmustbepaidtothepressureloss.Generally,coarsemetalmeshornotchedmetalwirematerialof100-200meshisused.Therefore,itisnotafiltertocontrolthepollutionconcentrationofthesystem.

High-pressurepipelinefilter(A)

ItisinstalledontheoutletpipeofthepumptoprotectpollutantsfromenteringTheroleofthesystem.Therefore,thepollutantconcentrationofthesystemcanbecontrolled.However,becauseitisahigh-pressuremainline,itissubjecttothepulsationandpressureimpactofthepump,sothematerialandstrengthofthefilterelementmustbecarefullyconsidered.

Highpressurelinefilter(B)

Inthesystem,inordertoprotecthydraulicpartsthatareparticularlysensitivetopollution,thisfilterisinstalled.Calledterminalfilter.Therefore,ittendstohaveasmallerfiltrationparticlesizethanotherfilters.Therefore,whenusing,choosealargecapacity.Inaddition,thematerialandstrengthofthecomponentsshouldbefullyconsideredasin(A).

Returnfilter

Setonthereturnlineofthesystem,itsfunctionistocapturethepollutantsgeneratedorinvadedinthesystembeforereturningtothefueltank..Therefore,itisthemosteffectiveandimportantfiltertocontrolthepollutionconcentrationofthesystem.Althoughitisalow-pressurepipeline,dependingontheoperatingconditionsofthetransmissiondevice,pulsationorpressureshockmayalsooccur,sothematerialandstrengthofthecomponentsmustbefullyconsidered.Importedpump

Circulationfilter

Itislocatedonthereturnpathofthefueltankcirculation.Thesystemhasalargecapacity,soitisoftenrequiredwhenstrictcleanlinessisrequired.Itisadopted,evenifthesystemisnotworking,itcancapturethepollutantsinthefueltank,therefore,theefficiencyofreducingthepollutionconcentrationisthebest.Inaddition,acoolerisinstalled,whichhastheadvantagesofsimultaneouscoolingandeasymaintenance.However,specialpumpsandmotorsarerequired,andthecostishigh.

Theairfilter

isinstalledonthefueltanktopreventpollutantsfrombeingmixedintothefueltankwithairduetothefluctuationofthefuelvolumeofthefueltank.Therefore,thefiltrationaccuracyshouldhavethesameperformanceasthefilter,andthecapacityshouldbeleftwithsufficientleewaytopreventtheinternalpressureofthefueltankfrombecomingnegativeduetothecloggingoftheholesandcausingthecavitationofthepump.Payspecialattentionwhenthesurroundingenvironmentisbad.

Othertypes

Usedonthefilterperformancetestbench,thistestbenchmuststrictlypurifythesystembeforethetest,sothetestsystemandthepollutioninjectionforthetestsystemThesystemneedstobeequippedwithafilter.Thefilterandthetestedfilteraretwodifferentthings.Itsaccuracyrequirementsanddirtholdingcapacityrequirementsarehigherthanthoseofthetestedfilter.InordertodistinguishbetweenthetwointhesametestsystemThiskindoffilteriscalledatestbenchfilter,andthetestedfilteriscalledthetestedfilter.

Fiber

Mechanicalfiltrationisthemostcommonlyusedmethodofsewagetreatment.Accordingtodifferentfiltermedia,mechanicalfiltrationequipmentisdividedintotwotypes:particlemediafiltrationandfiberfiltration.Theparticlemediafiltrationmainlyusessandandgravel.Theparticlefilterisusedasthefiltermediumtoachievefiltrationthroughtheadsorptionoftheparticlefilterandtheinterceptionofthesuspendedsolidsinthewaterbytheporesbetweenthesandparticles.Theadvantageisthatitiseasytobackwash,butthedisadvantageisthatthefiltrationrateisslow,generallynotexceeding7m/h;Theamountofdirtinterceptionissmall,andthecorefilterlayerisonlythesurfaceofthefilterlayer;thefiltrationaccuracyislow,only20-40μm,whichisnotsuitableforrapidfiltrationofhigh-turbiditysewage.

Thehigh-efficiencyasymmetricfiberfiltrationsystemusesasymmetricfiberbundlematerialasthefiltermaterial,andthefiltermaterialisasymmetricfiber.Onthebasisofthefiberbundlefiltermaterial,acoreisaddedtomakeitbothfiberfilterDuetothespecialstructureofthefiltermaterial,theporosityofthefilterbedcanquicklyformagradientdensityofupperandlowerparticles,whichenablesthefiltertofilterquickly,withalargeamountofdirtinterception,andeasybackwashing.Designedtomaketheprocessofdosing,mixing,flocculation,filtration,etc.becarriedoutinonereactor,sothattheequipmentcaneffectivelyremovesuspendedorganicmatterintheaquaculturewaterbody,reducethewaterbodyCOD,ammonianitrogen,nitrite,etc.,especiallysuitableforthecirculatingwateroftheholdingtankThesolidsuspensionisfiltered.

Scopeofapplication

1.Aquaculturecirculatingwatertreatment;

2.Coolingcirculatingwater,industrialcirculatingwatertreatment;

3Treatmentofeutrophicwaterbodiessuchas,rivers,lakes,anddomesticwaterscapes;

4.Reuseofreclaimedwater

Mechanismofaction

1.StructureofasymmetricfiberfiltermediaThecoretechnologyofthehigh-efficiencyautomaticgradientdensityfiberfilteristouseasymmetricfiberbundlematerialasthefiltermaterial,oneendofwhichisaloosefibertow,andtheotherendofthefibertowisfixedinasolidbodywithalargerspecificgravity.Thesolidcoreplaysaroleincompactingthefibertow,andatthesametime,duetothesmallsizeofthecore,ithaslittleeffectontheuniformityoftheporositydistributionofthefiltersection,therebyimprovingthedirtinterceptioncapacityofthefilterbed.Thefilterbedhastheadvantagesofhighfiberfiltrationporosity,smallspecificsurfacearea,highfiltrationrate,largedirtinterception,andhighfiltrationaccuracy.Whenthesuspendedflowinwaterpassesthroughthesurfaceofthefiberfiltermaterial,itwillbesuspendedundertheactionofvanderWaalsattractionandelectricity.Theadhesionofsolidsandfiberbundlesismuchgreaterthanthatofquartzsand,whichisbeneficialtoimprovefiltrationspeedandfiltrationaccuracy.

Duringbackwashing,duetothedifferenceinthespecificgravitybetweenthecoreandthefiberfilaments,thecomatailfibersspreadoutandoscillatewiththebackwashingwaterflow,resultinginastrongdragforce;thecollisionbetweenthefiltersisalsointensifiedInordertoimprovethemechanicalforceofthefiberinthewater,theirregularshapeofthefiltermaterialcausesthefiltermaterialtorotateundertheactionofbackwashingwaterandairflow,whichstrengthensthemechanicalshearingforceofthefiltermaterialduringbackwashing.Asaresultofthejointaction,thesolidparticlesattachedtothefibersurfacecaneasilyfalloff,therebyimprovingthecleanlinessofthefiltermaterial,sothattheasymmetricfiberfiltermaterialalsohasthebackwashingfunctionoftheparticlefiltermaterial.

2.Continuousgradientdensityfilterbedstructurewithsparsetopandbottomdensity

Thefilterbedcomposedofasymmetricfiberbundlefiltermaterialiscompactedbythewaterflow,whenthewaterflowsthroughthefilterlayerResistanceisgenerated.Fromtoptobottom,theheadlossisgraduallyreduced,thewaterflowisgettingfasterandfaster,thedegreeofcompactionofthefiltermaterialisgettinghigherandhigher,andtheporosityisgettingsmallerandsmaller,sothatalongthedirectionofthewaterflow,acontinuousgradientdensityisautomaticallyformedThefilterlayerisdistributed,forminganinvertedpyramidstructure.Thisstructureisveryconducivetotheeffectiveseparationofsuspendedsolidsinwater,thatis,thedesorbedparticlesontheupperpartofthefilterbedareeasilycapturedandinterceptedinthelowernarrowchannelfilterbed,realizingtheunificationofhighfiltrationrateandhigh-precisionfiltration,andimprovingthefilterTheamountofdirtintercepted,andthefiltrationcycleisprolonged.

Characteristics

1.Highfiltrationaccuracy:theremovalrateofsuspendedsolidsinwatercanreachmorethan95%,anditcanpreventmacromolecularorganicmatter,viruses,bacteria,Impuritiessuchascolloidandironhaveacertainremovaleffect.Thetreatedwateraftergoodcoagulationtreatment,whentheinletwateris10NTU,theoutletwaterislessthan1NTU;

2,thefiltrationspeedisfast:generally40m/h,Upto60m/h,whichismorethan3timesthatofordinarysandfilters;

3.Largedirtholdingcapacity:generally15～35kg/m3,whichismorethan4timesthatofordinarysandfilters;

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4.Lowwaterconsumptionrateofbackwashing:thewaterconsumptionofbackwashingislessthan1～2%oftheperiodicfiltrationwater;

5.Lowdosageandlowoperatingcost:duetothefilterbedstructureAndthecharacteristicsofthefiltermaterialitself,thedosageofflocculantis1/2to1/3oftheconventionaltechnology.Theincreaseincyclewaterproductionreducestheoperatingcostpertonofwater;

6.Smallfootprint:thesameamountofwaterisproduced,andthefootprintislessthan1/3oftheordinarysandfilter.

7.Strongadjustability.Parameterssuchasfiltrationprecision,interceptioncapacityandfiltrationresistancecanbeadjustedasrequired;

8.Thefiltermaterialisdurableandhasaservicelifeofmorethan20years.

Processflow

Theflocculationdosingdeviceisusedtoaddflocculanttothecirculatingwaterfromthepump.Aftertherawwaterispressurizedbytheboosterpump,theflocculantispassedthroughThepumpimpellerisstirredandmixeduniformlytosuspendthefinesolidparticlesandcolloidalsubstancesintherawwaterformicro-flocculationreaction,andquicklygenerateflocswithavolumegreaterthan5microns,whichflowthroughthefiltrationsystempipelineintothehigh-efficiencyasymmetricfiberfilter,andtheflocsarefilteredThematerialisfilteredandretained.

Y-type

Y-typefilter(waterfilter)belongstothepipelinecoarsefilterseries,andcanalsobeusedforgasorothermediumlargeparticlefiltration,installedonthepipelinetoremovefluidTherelativelylargesolidimpuritiesinthemediumenablethemachineryandequipment(includingcompressors,pumps,etc.)andinstrumentstoworkandoperatenormally,achieveastableprocess,andensuresafeproduction.TheY-typefilter(waterfilter)hastheadvantagesofsimpleproduction,convenientinstallationandcleaning,andlargedirtholdingcapacity.

Disctype

Thediscfilterisadevicethatiscomposedoffilteringunitsandusedinthefilteringsystem.

Thediscfilteriscomposedoffilterunitsarrangedsidebyside.Thefilterunitismainlycomposedofagroupofring-shapedreinforcedplasticfilterdiscswithgroovesorribs.Sewageentersfromtheoutsideduringfiltration,andtherimformedbytheedgeofthegrooveontheadjacentfilterdiscinterceptsthesolidsinthewater;whenbackwashing,thewaterflowsfromtheinsideoftheannularfilterdisctotheoutside,whichwilltrapthedirtonthefilterdiscRinsedownanddischargethroughthesewageoutlet.

Thediscsarestackedtightlyandcompactlyintheunit,andthemiddlegroovesoftheupperandlowerdiscsplayaroleoffilteringandinterception.Whentherawwaterpassesthroughthefilterunit,itflowsfromtheoutsidetotheinside,andtheimpuritieslargerthanthegroovewillbeinterceptedoutside.Thecorecomponentofthediscfilteristhestackedplasticfilterdiscs.Therearespecialgroovesorribsonthefilterdiscs.Thegroovesorribsontheadjacentfilterdiscsformchannelsofacertainsize.Theparticlesizeislargerthanthechannelsize.Thesuspendedmatterisinterceptedtoachievethefilteringeffect.Thisproductcanreplacetraditionalmechanicalfiltrationdevicessuchassandfilterstoalargeextent,withsuperiorperformanceandmuchlowerwaterandelectricityconsumptionthanotherproducts.

Thediscfilterisdesignedwithedgesofdifferentstructuresonbothsidesofthefilterdisc.Theseedgesaresuperimposedtoformaninterceptionsurface.Amongthem,thecurvededgemainlyservestointerceptandstorethesuspendedmatter.Theoutersideisslightlylarger.Theopendesigncanensurethatthereisnoneedtoloosenthefilterdiscduringbackwashing,andathoroughbackwashingeffectcanbeachievedwhenthewaterpressureislow;theannularedgedeterminesthefiltrationaccuracyandconstitutesthewaterchannel,andthefilterdisccanprovideupto5μfiltrationAccuracy.Whentherawwaterentersthemiddleofthetwo-layerfilterdisc,itfirstflowsalongthecurvededgeintothedisc,butitcannotenterdirectlyaftercarefulobservation.Atthistime,itistheannularedgethatplaystheroleoffilteringandinterception.Theimpuritiessmallerthanthesizeoftheannulargroovecanenterthecurvededgecommunicatingwiththeinsidealongtheannularedge,andthelargeimpuritiesareintercepted.

Theuniquestructureofthefilterdiscalsomakesthebackwashingprocessofflushingoutthedirtsimplerandeasier,withouttheneedforcomplicatedmotorsanddrivers,andasimplewaterflowisenoughtoflushoutthedirtFilterelement.Thisexcellentperformancereducesthebackwashingtimeofthefilter;atthesametime,becausethedirtisnotonlystoredbetweenthefilterplategroupandthehousing,butmorecanbestoredinsidethefilterplategroup,thefiltercanholdmoredirt

Initialeffect

FAOnePFInitialeffectfilter

InitialeffectplatefilterFAonePFprimaryeffectfilter

FA-PFprimaryeffectfilter,beforethefiltermaterialispleated,alayerofgalvanizedironmeshisattachedtotheairoutletsurfaceofthefiltermaterial.ThislayerofironmeshcannotonlyprotectThefiltermaterialwillnotbebroken,anditcanalsopreventthefiltermaterialfromdeformingduetowindpressure,soitcanensurethatallthesurfaceofthefiltermaterialcanbefullyutilized.

Useaspecialacupuncturetechniquetoprocessthefiberofthefiltermaterialtoformagradualstructure,sothatthefilterhasahigherdustcapacityandalongerservicelife.

Theouterframeofthefilteriscomposedofasolidwaterproofboard,whichisusedtofixthefoldedfiltermaterial.Thediagonaldesignontheouterframecanprovidealargefilteringareaandmaketheinnerfiltermaterialtightlyadheretotheouterframe.Thesurroundingsofthefilteraregluedwiththeouterframewithspecialprofessionaladhesiveglue,whichcanpreventairleakageordamagecausedbywindpressure.

Features:

Thefilterisdividedintothreesizesofdepth1'',2''and4'',anditsfilteringareaisageneralflatfilter.Fivetimesthenet,ithasalongerservicelifeandhigherfiltrationefficiencythanaclassofglassfiberfiltersorrayonfilters.

Itcanbeuseddirectlyorasaprimaryfiltertoprotectthemiddleandhighefficiencyfiltersinthebacksectionoftheairconditioningsystem.

Thefiberistreatedwithaspecialpinningtechniquetoformagradualstructure,sothatthefilterhasthecharacteristicsoflowpressureloss,highdustcollection,andlongservicelife.

Usage:

ThecoarsefiltersystemofgeneralairconditionercanextendtheservicelifeofbagandHFPAfilters.Itisacoarsefilterforfactoryexhaustgasandprocessingdustcollection.

Faucet

Basicinformation

Specifications:height60mmColor:lightblue,lightpink,white(randomlyissued)

Composition:1filter,1connection

Material:PSplastic,zeolite,activatedcarbon(coconutshell),PVAnon-wovenfabric

Features

Thematerialrequirementsandeffluentqualityrequirementsareproducedinaccordancewiththe"RegulationsonHygienicSafetyandFunctionalEvaluationofDrinkingWaterDisposers".

Itcanremoveresidualchlorine,heavymetalsandotherimpuritiesintapwater.Makethewatermoresweetandsanitary.

Thisproductachievestheeffectofrapidlayeredfiltrationandpurificationthroughtheinternalwaterfiltertissuelayer:

⒈Non-wovenfabric:filteroutironslagandvisibleimpuritiesinthewaterpipe;Coconutactivatedcarboncanreducethealkalinesubstancesinthewater;

⒉Silicateionzeolite:Itcanremovesomeheavymetalimpuritiesandodorssuchasresidualchlorineandresidualammonia,makingthewatermoresweetandsanitary;

⒊Coconutshellactivatedcarbon:high-qualitycoconutshellasthematerial,theproducthasgoodadsorptioncapacity,highstrength,anduniformparticlesize.Theappearanceisblack,withwell-developedvoids,highadsorptionrate,goodstrength,stableperformance,easyregeneration,anddurability.Itcaneffectivelyremovethepeculiarsmellandcolorinthewater,andcaneffectivelyhelppeopleremovecarcinogens,makingthewaterclearandsoftintaste.Itiswidelyusedinthedeeppurificationofdrinkingwater.

⒋Theproductissmallinsize,easytoloadandunload,andissuitableforallkindsofoldandnewfaucets;

⒌Slowdownandcontrolthewaterflowofthefaucet,preventwatersplashes,andsavewatersources.

Scopeofapplication

Becausethefaucetspecificationsaredifferent,inordertoenhancethesealingeffectoftheinstallation,

Itcanbeproperlyadjustedduringtheinstallationprocess.Userawmaterialtape(sealingtape).

Precautions

1Avoidusingitinhotwaterforalongtime,preferablybelow50degrees.

2Blackwaterwillflowoutwhenitisfirstused,whichiscausedbythepowderofbasicactivatedcarbon,anditcanbeusednormallyafter5-10secondsofdrainingthewater.

Newproductdevelopment

Traditionalfiltersusuallyuseafiltertoseparateparticlesfromtheliquid.Thefilterneedstobereplacedandcleanedfrequently,otherwiseitispronetoclogging.Incomparison,fishhaveastrongeroralfiltrationcapacity.Filter-feedingfish,suchasgoldfish,spoonsturgeons,baskingsharks,andwhalesharks,canretainfoodparticlesduringfilteringwhileavoidingcloggingoftheoralfilterbydebris.

TheresearchteamoftheCollegeofWilliamandMaryintheUnitedStatesreportedonMarch29,2016thattheydesignedahigh-efficiencyfiltermodelbasedonthefiltermechanismofthefilter-feedingfishmouthstructure,whichcaneffectivelyavoidthecloggingproblem.TheyreportedinthelatestissueoftheonlineversionoftheBritish"NatureCommunications"thatbasedonthestructurecalled"gillarch"inthemouthofthekeysnoutsturgeonandbaskingshark,theydesigneda3Dprintedtaperednylonplasticfiltermodel.Theyputthemodelinawaterflowpooltoobservethefilteringeffect,andcompareditwiththefilteringmechanismoftheoralstructureoftheskeysnosesturgeon.

Itturnedoutthatboththemodelandthefish’smouthareusedtotrapparticlesandpreventblockagesbycreatingvortexesintheliquid.Thegillarchisacone-shapedstructureformedbybendinghardbonesorcartilagetosupportthegills.Thebonesarearrangedinparallellikeold-fashionedradiators.

Theresearchersexplainedthatthetaperedstructurehelpsthewaterflowinthefish’smouthtoformwatercurrentsandvortices,whiletheparallelarrangementofboneshelpssmallparticlestogather,andthetwocombinetoforma"vortex".The"rotatingstepfilter"mechanismallowsparticlessmallerthanthegapbetweenthebonestobeintercepted.

OneoftheauthorsofthereportandascholaratWilliamandMaryCollegeLaurieSandersonsaidthatthiskindoffiltrationmechanismwillbewidelyusedinthefuture,frommicrofiltersthatfilteronlycell-sizedparticlestolargeindustrialpipelines.Allfilterscanplayaroleinhighefficiency.

Installationmethods

Therearethreetypes:flangeconnection,threadedconnectionandwelding.

Selectionprinciple

1.Inletandoutletdiameter:

Inprinciple,theinletandoutletdiameterofthefiltershouldnotbelessthanTheinletdiameterofthematchedpumpisgenerallythesameastheinletpipediameter.

2.Nominalpressure:

Thepressurelevelofthefilterisdeterminedaccordingtothehighestpressurethatmayappearinthefilterpipeline.

3.Selectionofthenumberofholes:

Themainconsiderationistheparticlesizeoftheimpuritytobeintercepted,whichisdeterminedaccordingtotheprocessrequirementsofthemedium.Fortheparticlesizethatcanbeinterceptedbyvariousspecificationsofscreens,checkthefollowingtable"Filterspecifications".

4.Filtermaterial:

Thematerialofthefilterisgenerallythesameasthematerialoftheconnectedprocesspipeline,anditcanbeconsideredfordifferentserviceconditions.Filtermadeofcastiron,carbonsteel,lowalloysteelorstainlesssteel.

5.Filterresistancelosscalculation

Forwaterfilters,thepressurelossis0.52～1.2kpaunderthegeneralcalculationoftheratedflowrate

Installationlocation

⑴Ingenerallow-pressuredeviceswithapressurebelow140kg/cm2,usuallyonlythesuctionfilterisinstalled,butthereturnfilterandairfiltershouldalsobeinstalled.

⑵Ingeneralmediumandhighpressureliquidinstallationswithapressureabove140kg/cm2,areturnfilterisgenerallyusedtocontrolthepollutionconcentration.However,whentherearespecialrequirementsforreliability,ahigh-pressurepipelinefiltershouldbeusedtogether.

⑶Inordertoincreasethereliabilityofelectromagneticproportionalcontrolvalveorsmallflowregulatingvalve,aterminalfiltershouldbeinstalled.

⑷Whenusingservovalves,effortsshouldbemadetoreducethepollutionconcentrationofthesystem.Therefore,highpressureandreturnfiltersshouldbeusedtogether;forlargevolumes,acirculatingfiltershouldbeinstalled,andaterminalshouldbeinstalledontheauxiliarypipeline.filter.

Precautions

Theinstallationpositionsoftheoilfilterinthehydraulicsystemareusuallythefollowing:

⑴Itmustbeinstalledatthesuctionportofthepump:

Surface-typeoilfiltersaregenerallyinstalledonthesuctionlineofthepumptofilteroutlargerimpuritiesandparticlestoprotectthehydraulicpump.Inaddition,thefilteringcapacityoftheoilfiltershouldbemorethantwicethepumpflow,Thepressurelossislessthan0.02MPa.

⑵Installedontheoutletoilcircuitofthepump:

Thepurposeofinstallinganoilfilterhereistofilteroutpollutantsthatmayinvadevalvesandothercomponents.Itsfiltrationaccuracyshouldbe10-15μm,anditcanwithstandtheworkingpressureandimpactpressureontheoilcircuit,andthepressuredropshouldbelessthan0.35MPa.Atthesametime,asafetyvalveshouldbeinstalledtopreventcloggingoftheoilfilter.

(3)Installedontheoilreturnlineofthesystem:Thiskindofinstallationplaysanindirectfilterfunction.Generally,abackpressurevalveisinstalledinparallelwiththefilter.Whenthefilterisblockedandreachesacertainpressurevalue,thebackpressurevalveopens.

⑷Installedonthebranchoilcircuitofthesystem.

⑸Singlefiltersystem:Largehydraulicsystemcanbespeciallyequippedwithahydraulicpumpandoilfiltertoformanindependentfiltercircuit.

Inadditiontotheoilfilterrequiredbytheentiresysteminthehydraulicsystem,aspecialoilfilterisofteninstalledinfrontofsomeimportantcomponents(suchasservovalves,precisionthrottlevalves,etc.).Makesuretheyareworkingproperly.

Selectionpoints

Whenselectingtheoilfilter,thefollowingpointsshouldbeconsidered:

⑴Thefilteringaccuracyshouldmeetthepredeterminedrequirements.

⑵Itcanmaintainsufficientflowcapacityforalongtime.

⑶Thefilterelementhassufficientstrengthandwillnotbedamagedbyhydraulicpressure.

⑷Thefilterelementhasgoodcorrosionresistanceandcanworkforalongtimeunderthespecifiedtemperature.

⑸Thefilterelementiseasytocleanorreplace.

Therefore,theoilfiltershouldbeselectedaccordingtothetechnicalrequirementsofthehydraulicsystem,accordingtothefilteringaccuracy,flowcapacity,workingpressure,oilviscosity,workingtemperatureandotherconditions.

Accuracyconversion

Numberofmeshes	μm	Numberofmeshes	μm
2	8000	100	150
3	6700	115	125
4	4750	120	120
5	4000	125	115
6	3350	130	113
7	2800	140	109
8	2360	150	106
10	1700	160	96
12	1400	170	90
14	1180	175	86
16	1000	180	80
18	880	200	75
20	830	230	62
24	700	240	61
28	600	250	58
30	550	270	53
32	500	300	48
35	425	325	45
40	380	400	38
42	355	500	25
45	325	600	23
48	300	800	18
50	270	1000	13
60	250	1340	10
65	230	2000	6.5
70	212	5000	2.6
80	180	8000	1.6
90	160	10000	1.3

Testprinciple

※Bubblepointmethodtestprinciple:Whenthefiltermembraneandthefilterelementarecompletelyinfiltratedwithacertainsolution,andthenpressurizedononesidebytheairsource(theairinletcontrolsysteminourinstrumentcanstabilizethepressureandadjusttheairinlet),asthepressureincreases,theairflowsfromthefiltermembraneReleaseonthesideofthefilm,showingthesizeandnumberofthefilmonthesideForbubblesofvaryingamounts,thecorrespondingpressurevaluedeterminedbytheinstrumentisthebubblepoint.

※Diffusionflowtestprinciple:Diffusionflowtestmeansthatwhenthegaspressureis80%ofthebubblepointvalueofthefilterelement,therehasnotyetbeenalargeamountofgasperforation,butasmallamountofgasfirstDissolveintothemembraneoftheliquidphase,andthendiffusefromtheliquidphasetothegasphaseontheotherside.Thispartofthegasiscalledthediffusionflow.

※Whythediffusionflowmethodisbetter:Thebubblepointvalueisonlyaqualitativevalue.Fromthebeginningofthebubbletothefinalgroupbubble,itisarelativelylongprocessandcannotbeaccuratelyquantified.Themeasurementofthediffusionflowvalueisaquantitativevalue,whichcannotonlyaccuratelydeterminetheintegrityofthefilter,butalsoreflecttheporosity,flowrateandeffectivefiltrationareaof​​themembrane.ThisiswhyforeignmanufacturersusediffusionThereasonfortheintegrityoftheflowmethodtest.

※Waterintrusionmethodtestprinciple:Thewaterintrusionmethodisdedicatedtothetestofhydrophobicfilterelements.Thehydrophobicmembraneisresistanttowater.Thesmallertheporesize,thegreaterthepressurerequiredtosqueezewaterintothehydrophobicmembrane.Therefore,underacertainpressure,measurethewaterflowsqueezedintothefiltermembranetodeterminetheporesizeofthefilterelement.

Industrystandard

CJ/T3068-1997polymersinteredmicroporoustubularfilter

GB/T13554-2008highefficiencyairfilter

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GB/T14295-2008airfilter

GB/T14382-2008three-passfilterforpipeline

GB/T17486-2006hydraulicfilter

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HG/T21637-1991chemicalpipelinefilter

HG/T4085-2009pressuretypefiberbundlefilter

JB/T7538-1994pipelinebasketFilter

SY/T0523-2008oilfieldwatertreatmentfilter

YY-T0142-1994single-useairfilterforinfusionandbloodtransfusionequipment

JB-T7374-1994pneumaticairfilter

HG-T20570.22-1995pipefilter

JB-T6417-1992airfilterforairconditioning

JB-T9044-1999highgradientmagneticfilter

YY0286.1-2007disposableprecisionfilterinfusionset

JB/T10410-2004industrialwaterautomaticreactionFlushingfilter

Maintenance

①.Coarsefilter

1.Thecorepartofthefilteristhefilterelement,whichconsistsofthefilterFrameandstainlesssteelwiremesh.Thestainlesssteelwiremeshisawearablepartandneedsspecialprotection;

2.Afterthefilterhasbeenworkingforaperiodoftime,certainimpuritieshaveprecipitatedinthefiltercore,andthepressuredropsatthistime.Increase,theflowratewilldecrease,andtheimpuritiesinthefilterelementneedtoberemovedintime;

3.Whencleaningimpurities,payspecialattentiontothestainlesssteelwiremeshonthefilterelementnottobedeformedordamaged,otherwise,installitagainAfterthefilter,thepurityofthefilteredmediumdoesnotmeetthedesignrequirements,andthecompressor,pump,instrumentandotherequipmentwillbedamaged;

4.Ifthestainlesssteelwiremeshisfoundtobedeformedordamaged,itneedstobereplacedimmediately.

②,precisionfilter

1.Thecorepartoftheprecisionfilteristhefilterelement.Thefilterelementiscomposedofspecialmaterials,whicharesuitableforwearandneedspecialprotection;

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2.Whentheprecisionfilterhasbeenworkingforaperiodoftime,thefilterelementofthefilterwillholdacertainamountofimpurities.Atthistime,thepressuredropwillincreaseandtheflowratewilldecrease.Theimpuritiesinthefiltermustberemovedintimeandcleanedatthesametime.Filterelement;

3.Whenremovingimpurities,payspecialattentiontotheprecisionfilterelement.Itmustnotbedeformedordamaged.Otherwise,thefilterelementthatisinstalledagainwillnotmeetthedesignrequirementsofthepurityofthefilteredmedium;

4.Someprecisionfilterelementscannotbeusedrepeatedly,suchasbagfilterelements,polypropylenefilterelements,etc.;

5.Ifthefilterelementisfoundtobedeformedordamaged,itneedstobereplacedimmediately.

Three.Payattentiontorustprevention,paintorbutterontheflange,andheatpreservation

Applicationindustry

⒈Irrigationofgardenlawnandagriculture.

⒉Totalwatersupplyfiltrationsystemforcatering,textile,mining,electronics,andfoundryindustries.

⒊Waterfiltrationfornozzlesinpulpingandpapermaking,metallurgyandmachineryindustries.

⒋Generalcirculatingwaterfiltrationinfood,power,mining,andsmeltingindustries.

⒌Pharmaceutical,petrochemicaloilrefining,airconditioningsystemorheatingsystemcoolingtowercirculatingwaterfiltration.

⒍Ionexchangepretreatmentofpetrochemical,electromechanical,andpharmaceuticalwastewater.

Filterscreen

Thefilterscreenismainlystainlesssteelwiremesh.

Stainlesssteelwiremesh(Stainlesssteelmesh)

Material:SUS201,202,302,304,316,304L,316L,321stainlesssteelwire

Weaving:plainweave,twillweave,denseweave

Thespecificationofstainlesssteelwiremeshis1mesh-635mesh.Inthecaseofdensetwillweave,itcanreachamaximumof2800mesh.

304stainlesssteelmeshgenerallyrefersto"18-8"(18%chromium,8%nickel)mostlybasicstainlesssteelalloy,whichisverysuitableformeshcloth.Itcanbeexposedoutdoorsandwillnotrustorbeoxidizedwhentheoutsidetemperaturerisesto1400degreesFahrenheit.

304LstainlesssteelmeshisverysimilartoT-304,thedifferenceisthatthecarboncontentisreduced,whichismoreconducivetoweavingandre-welding.

316stainlesssteelmeshcanbestabilizedbyadding2%molybdenum.T-316isan"18-8"alloy.Itislesspronetocorrosionthanotherchromium-nickelstainlesssteelsinsaltwater,sulphurwaterorinhalogensalts.Forexample,chlorideisanobviousexample.ThemostvaluablefeatureofT-316isthatithasstrongercreepresistanceatrisingtemperatures.OthermechanicalandstructuralfeaturesarethesameasT-304.

316LstainlesssteelmeshisverysimilartoT-316,thedifferenceisthatthecarboncontentisreduced,whichismoreconducivetoweavingandre-welding.

Usage:Becausestainlesssteelhasthepropertiesofacidresistance,alkaliresistance,abrasionresistance,temperatureresistance,etc.,itisoftenusedforscreening(screen)andfiltering(screen)underacidandalkalienvironmentalconditions.Itisusedasmudinthepetroleumindustry.Mesh,chemicalfiberindustryasascreenfilter,electroplatingindustryasapicklingmesh

filterelement

Asthenameimplies,theprecisionfilterelementistheheartofthefilter.Thefilterelementisgenerallyusedforoilfiltrationandwaterfiltration.Filtration,airfiltrationandotherfiltrationindustries.

1.Theairpermeabilityoftheprecisionfilterelement:thefilterelementadoptsthestronghydrophobicandoleophobicfiberfiltermaterialoftheUnitedStates,andadoptsaframeworkwithgoodpermeabilityandhighstrengthtoreducetheresistancecausedbypassing.

2.Thehighefficiencyoftheprecisionfilterelement:thefilterelementadoptsthefine-openingspongeofGermany,whichcaneffectivelypreventtheoilandwaterfrombeingentrainedbythehigh-speedairflow,sothatthesmalloildropletsthatpassdowntheroadgatheratthelowerendofthefilterelementspongeandarearrangedsidebysideThebottomofthefiltercontainer.

3.Theairtightnessoftheprecisionfilterelement:areliablesealingringisusedatthejunctionofthefilterelementandthefilterhousingtoensurethattheairflowisnotshort-circuitedandpreventimpuritiesfromdirectlyenteringthedownstreamwithoutpassingthroughthefilterelement.

4.Anti-corrosionofprecisionfilterelement:Thefilterelementadoptsanti-corrosionreinforcednylonendcapandanti-corrosionfilterelementframe,whichcanbeusedinharshworkingconditions.