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: info@bollfilter.deInternet: www.bollfilter.de

2000

/09/

2014