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BOLL & KIRCH Filterbau GmbH
bipolar,continuous, process-optimised
bipolar,continuous, process-optimised
bipolar,continuous, process-optimised
BOLLFILTER AutomaticTYPE 6.18/6.19
42
THE TASKBalancing Economy with Efficiency
THE SOLUTION Filter candle open at both endsBOLLFILTERAutomatictypes6.18and6.19usecylindricalfiltercandlesopen
atbothendswithdynamicthrottlingatthetop.
•contributetokeepingoperatingcosts
lowthroughminimummaintenance
andlongservicelives.
TheBOLLFILTERAutomatictypes6.18
and6.19fulfiltheserequirementsinan
optimalway.Withtheiruniquebipolar
modeoffunctioninginfilterandback-
flushmodes,theysettheprocessquality
andperformancestandardsinthefield
ofwaterfiltration.
Theeconomicoperationofmodern
factories,inwhichlargevolumesof
coolingwaterinopenorclosedcooling
circuits,processwaterandwaste-water
areused,placesthehighestrequire-
mentsonthefiltrationprocess.
Thefiltersusedheremust
•ensurethroughtheirprecisionthat
thefluidtobetreatediscleanedtoa
defineddegree,
•guaranteethroughtheirreliabilitythe
uninterruptedandfailure-freeoper-
atingofthecompleteplantand
Large-scale plants such as power stations require the shortest possible set-up and downtimes.For further information on areas of appli-cation, see page 7.
Simultaneously,thepressuregradient
thatarisespermitsasmallerquantityof
fluidtoflowinreverse-flowfromabove
throughthefiltercandle.Therotating
throttlewithPTFEcoveringplatesatthe
upperendofthefiltercandlesensures
deliberatecross-flowbackflushingand
distributionofthebackflushingenergy
overthefulllengthofthecandle.The
combinationofaxial-flowandcross-
flowproducesanoptimalbackflushing
effectwithuniformcleaningalongthe
fulllengthofthecandle.
Thankstothisbipolarfunctionalprinciple
withcylindricalfiltercandlesopenatboth
ends,theBOLL6.18and6.19filtershave
severaladvantagesoverfilterswithconical
orexpandingdiscfilterelements:
•Theyhavetobereplacedlessfrequent-
lythanconicalandcylindrical
candles,becausetheeffectiveback-
flushingpreventsthecandlesfrom
becomingprogressivelyblocked.
Savingbothlabourandspareparts
costs.
•Thewayinwhichsolidsareseparated
issignificantlymorereliablethanwith
expandingdiscelements,asthereisa
dangerthatparticlesofcontamination
willstickinbetweentheexpanding
discs.Atthepointofchangeover
frombackflushingtofiltration,these
trappedparticlescanbereleasedand
thedefineddegreeoffilteringwillno
longerbeachieved.
•Incontrasttoconicalandexpanding
discfilterelements,BOLLcandlescan
besuppliedwithlongitudinalwedge
wires.Thisproducessuperior
cleaningresultsparticularlywith
fibrouscontaminants.
Thefluidtobefilteredflowsviathetwo
endsintotheinsideofthecandles.In
thisway,theparticlesofcontamination
tobefilteredoutareretainedoverthe
wholelengthoftheinsideofthe
candlessothatthefullfilteringareais
uniformlyused.
Whenthecontaminationdepositedon
theinsideofthecandlereachesalevel
atwhichcleaningofthefilterbecomes
necessary,thebackflushingprocessis
initiatedautomatically.Agearedmotor
setsthecleaningdeviceinaction.A
coveringarmmovesovertheupper,
openendofthefiltercandleandcloses
it.Atthesametime,theflushingarmat
thelowerendisturnedandthesludge
releasevalveisopened.Inthisway,a
highaxialflowisestablishedinthe
filtercandle.
53Sa fe t y needs qua l i t y.
Filter candles open at both ends – the bipolar functional principle
Backflushing phase
*MET Motoren- and Energietechnik GmbH, Rostock, Prof. Dr.-Ing.habil. S.Bludszuweit, Dipl.-Ing. M. Britsch and Dipl.-Ing. Claudia Escher, 1996/1998.
Wedge wire candle
Filtration phase
Conical Element Expanding Disc Element
Backflushing phase
Longitudinal wedge
wire candle
Comparison of the flushing speed* withcandles closed at the top
Cylindrical Element Conical ElementFiltration phase
Flushing speed* with candle open at both ends with throttle at top
+ -Intensity of the flushing action
Candle designs with lower flushing action
4
Backflushing
4
TheBOLLFILTERAutomatictypes6.18
and6.19arerobustlyconstructedofa
materialsuitableforthespecificapplica-
tionnodular,castiron,carbonsteelor
stainlesssteel.Basedonyearsofexperi-
enceinthisfield,thedesignisboth,simple
foreaseofmaintenanceandeffectivefor
precisefiltrationlevels.Availableinarange
ofsizes,connectionflangesupto1000mm
foraflowrateupto10000m3/h.Thefilter
elementsandallinternalparts,connecting
tubesandunionsareofchrome-nickel-
molybdenumsteel(Cr.Ni.Mo.steel).The
solemovingpartsaretheflushingarm
andthecoveringarm.Theplasticbush-
esoftheseareself-adjusting.Thesliding
bearingandtheflushingbushesofplastic
aresealedagainstcontamination.
Infilteringmodethefluidtobefiltered
reachesthelowerpartofthehousingvia
theinletflange.Aflowofapprox.50%
oftheunfilteredmediumisledviathe
centralriserpipe inthefilterinsertinto
Theeconomicaloptimumcanbeex-
pressedas“asmuchaspossible”for“as
littleasnecessary”.Forthosemaking
capitalinvestmentdecisions,optimum
expenditurecanbeexpressedaseither,“as
littleaspossible”or,“asmuchasisneces-
sary”.Themorecapital-intensivetheplant
andmachinery,thegreaterthenecessity
foranone-offexpenditureonahighqua-
lityfilteringsystem.Inexistingplant
too,long-termeconomiescanbemade
byselectingeffectiveandefficientfilter
systems.Theinstallationofproperfiltra-
tionisthemarkofaprogressivebusiness.
THE CONCEPT
THE ADVANTAGESEconomical and ecologically trend-setting
theupperpartofthehousingandfrom
theredownwardsintotheopenendofthe
filterelements.Theotherhalfflows
fromthebottomupwardsintothefilter
element.Thefilteredfluidpassestothe
outsideviathegaps inthecandle.Gap
widthsdownto50micronsarepossible.
Duringthebackflushingcycle,thecan-
dlesarecleanedoneaftertheotherwith-
outthefiltrationprocessbeinginter-
rupted.Theinjectionflow generated
preventsblockingintheupperpartofthe
filterelement.Backflushingcanbecarried
outwiththefiltratefluid(type6.18)oran
externalmedium(type6.19),selection
beingbasedontheplantoperatingpres-
sure.Steamorwaterathighpressureis
usedastheexternalmediumatoperating
pressuresoflessthan2barorwhensticky
contaminantsarepresent.Backflushing
isinitiatedasafunctionofthedifferential
inpressurebetweentheinletand
outletoratprogrammableintervals.
BOLLFILLTERsprotecthigh-valuecapi-
talequipmentfromprematurewearby
filteringthedirtoutofthecontaminated
fluidinaconsistentmannerandfeeding
thecleanedfluidbackintotheprocess
again.Theycontributetosecuringthe
operationalreliabilityoftheplantina
continuousandlong-termmanner.
Thissavesresourceswhileprotecting
theenvironmentandreducingcosts.In
thisway,BOLLFILTERsarethebest
insuranceforbothproductandprocess,
providingtheopportunityforreinvest-
ment,growthandprofit.
Designed from experience to be flexible and application-oriented
5
Filtration
5Sa fe t y needs qua l i t y.
Pressure loss in bar
Flow
rat
es in
m3 /
h
9000
0,05 0,1 0,2 0,3 0,4 0,5
V=
2 m
/s
V=
3 m
/s
V=
4 m
/s
800070006000
50004000
3000
2000
1000
500400
300
200
150
100
50403020
DN 800
DN 700
DN 600
DN 500
DN 400
DN 300
DN 250
DN 200
DN 150
DN 100
DN 50
Flow rates of water
Of decisive importance for the design and sizing of a filter are the operational param-eters. The size has to be selected on the basis of the flow rate, the degree of contam-ination, the filtration degree required and the permissible pressure loss in the filter. The diagram shows the f low rates with water at different nominal diameters at a filtrati on degree of 0.5 mm as a function of the pressure drop.
Control and Monitoring
Asstandard,thebackflushingfilterisprovidedwithanelectroniccontrolboxwhichcomprisesthefollowingfeaturesandfunctions:
•Membranekeypadwiththreekeys
•2-linedisplay
•Impact-resistantdisplaycover
•Displayofbackflushingoperation,
numberofbackflushesanderror
messages
•Adjustableovercurrentrelease
•CPUboardwithnonvolatileEPROM
andprogrammememory
•I.O.boardinthecontrolbox
•Mainswitchwithinterlockingsystem
4
THE DETAILSIn summary form
6
THE COMPLETE OFFER
AtBOLL&KIRCH,weconcentrate
exclusivelyonthedesignandfabricati-
onoffiltersforfluids.BOLLFILTER
productsaretheresultofourownrese-
archanddevelopmentandmanyare
protectedbypatent.Customerscan
takeadvantageofourspecialistknow-
howbyinvolvingBOLL&KIRCHengi-
neersintheirprojectsrightfromthe
earlieststages.Thecombinationofex-
pertiseonbothsidesinasimultaneous
engineeringwillensureperfectresults.
BOLL&KIRCH'sglobalpresenceinall
importantindustrialcentresguaran-
teescustomersanywhereintheworld,
serviceofthescopeandreliabilitythey
havearighttoexpectfromasupplier
oftechnologicallysophisticatedfilter
systems.Acomponentofthisservice
systemisthepromisethatBOLLFILTER
GenuinePartswillbedispatchedto
anypartoftheworldwithin24hours.
Quality thanks to specialization
Economic manufacturing on CNC and DNC controlled machine tools
Our various stores and logistics systems underpin speedy and efficient production.
BOLLFILTER Genuine Parts leave the central warehouse within 24 hours of order.
Type 6.18
backflushing with filtrate fluid
filtration of water and emulsions
9000 m3/h
50 microns
50 - 900 mm
from 0 to 16 bar (higher pressures on request)
gray cast iron casting or welded steel
filtrate fluid
as function of time or differential pressure
cylindrical candles open at both ends
lateral or longitudinal wedge or wire mesh
dirt pump in the sludge removal line
Areas of application
Max. flow rate
Max. filter fineness
Nominal diameter of connection flange
Operating pressures
Housing material
Backflushing medium
Backflushing control
Filter candle type
Candle types
Optional accessories
Type 6.19
backflushing with external medium
filtration of water and emulsions
2500 m3/h
50 microns
50 - 400 mm
from 0 to 16 bar (higher pressures on request)
gray cast iron or welded steel
external medium
as function of time or differential pressure
cylindrical candles open at both ends
lateral or longitudinal wedge or wire mesh
dirt pump in the sludge removal line
booster pump
57Sa fe t y needs qua l i t y.
7. Automobile industry• Process water, cooling water
for welding shops, air-conditioning systems and power stations
• Fire extinguishing water
1. Chemical and petrochemical industry • Process water • Cooling water for production, air conditioning systems and power stations • Fire protection
2. Sewage treatment plants • For filtering of treated effluent
for use as process water• For filtering of effluent to be
discharged into open bodies of water
8. Steelworks • Cooling water for rolling mills,
skin-pass stands, heat treatment systems
• Quenching water for continuous casting lines
9. Artificial snow • Operating water for
snow-making machines
Power stations (see photo on page 2)• Cooling water for turbines and oil circuits • Sealing water for the axial face
seal of the turbine shaft
Examples of areas of application for BOLLFILTERs AutomaticTYPE 6.18 and TYPE 6.19:
TYPE 6.19
TYPE 6.18
3. Paper industry • Process water • Washing (injection) water
for the paper machine
5. Heating, refrigerating and air-conditioning systems• Cooling water for building systems
(e.g. for air-conditioning plant, computer room)
6. Mining • Process water • Cooling water
4. Offshore industry• Injection water for oil rigs
Type 6.19
backflushing with external medium
filtration of water and emulsions
2500 m3/h
50 microns
50 - 400 mm
from 0 to 16 bar (higher pressures on request)
gray cast iron or welded steel
external medium
as function of time or differential pressure
cylindrical candles open at both ends
lateral or longitudinal wedge or wire mesh
dirt pump in the sludge removal line
booster pump
•Modularsystemwithmanypossiblevariants
•Effectiveremovalofthecontamination
•Simplehandling
•Compactdesign
•Lowpressurelosses
•Lowoperatingcosts
•Lowbackflushingquantities
•Largefiltersurfaces
•Longservicelife
•Longmaintenanceintervals
•Easyandquickcleaningandmaintenance
•Preciselyfunctioningbackflushingdevice
•Exactlydefinedgradeoffiltrationthanksto
precisionfiltercandles
BOLLFILTERs Automatic are characterized by the following particularly advantageous properties:
BOLL & KIRCH Filterbau GmbH P. O. Box 14 20 • D-50143 Kerpen • GermanySiemensstr. 10-14 • D-50170 Kerpen • GermanyTel.: +49 2273 562-0Fax: +49 2273 562-223E-mail: [email protected]: www.bollfilter.de
2000
/09/
2014