Tank farm for solvents at a road building materials manufacturer

•Continuousmonitoringofcurrenttankinventory•2-wireconnectiontechnology•Maintenance-free,non-contactlevelmeasurement

1. Background ASwisscustomeroperatesatankfarmforsolventsrequiredintheproductionofroadbuildingmaterials.Inthepast,measuringdevicesbasedonmechanicalmeasuringprincipleswereusedtomeasurethelevelsinthetanks.Theywereextremelyinaccurateandrequiredsignificantmaintenance.

Theendproductsare•standardised,specialbindingagentsforroadsurfacescontainingbitumen,•bitumenemulsionsforrepairingandbuildingroads,•specialemulsionsforsurfacerecyclingandslurrysurfacing.•bindersforthesurfacetreatmentaswellas•specialproductstoprotect,repairandreconstructingroadsurfaces.

2. Measurement requirements

Radarlevelmeasuringdevicesweretheonlyoptionwhenitcametoupgradingthetankfarmasultrasonicdevicesarenotsuitedtothepropertiesoftheproducts.Non-contactmeasurementwasalsoanimportantrequirementforusingradarmeasuringdevices.Onefurtherrequirementwasthetwo-wireconnectiontechnologyusedtokeepwiringcoststoaminimum.Aspecialmeasuringprinciplewasrequiredforthelowerchamberofone2-chambertank.Thislevelmeasurementnowtakesplaceusingabypassmeasuringdevicewhichalsomeetstherequirementsoutlinedabove.Themeasuringdevicesmustbeeasytoconfigureusingcommunicationtechnologyfromonemeasuringstationandtheymustsupporttheremoteretrievalofmeasuredvalues.

APPLICATION NOTE Chemicals

Bypass measurement on a 2-chamber tank

Application 143 EN.indd 1 05.05.2010 15:32:07 Uhr

©KROHNE5/2010-14

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3. KROHNE Solution

KROHNEsupplied7OPTIWAVE7300CradarlevelmeasuringdevicesandoneBM26Wradarbypassmeasuringdevice.

AlldevicesfunctionbasedontheFMCWradarmeasuringprinciple.

ThePACTwareandDTMsincludedasstandardmakeitpossibletoconfigureandrecordthemeasuredvaluesofthelevelmeasuringdevicesfromthemeasuringstation.

4. Customer advantages

Fromthemeasuringstationitisnowpossibletocontinuouslymonitorthecurrentinventory.Assoonasthepresetmaximumlimithasbeenreachedwhenfillingthetank,thepumpsareswitchedoff.Thiseliminatestheneedfortime-consumingon-sitemonitoring.Oncethepresetminimumlevelhasbeenreached,newsuppliescanbeordered.Thebypasssolutionforthe2-chambertankwiththeBM26WfunctionsasreliablyastheKROHNEOPTIWAVE7300CFMCWradarmeasuringdevicesinstalledonthetanks.

Themeasuringdeviceshavealreadyproventhemselvesinpracticeandareworkingsmoothly.

5. Products used

OPTIWAVE 7300 C • Precisemeasurementindifficultconditions–evenintankswithagitatedsurfaces,foamorinternalobjects

• Producttemperatureupto200°Candoperatingpressureupto40bar• Measuringrangeupto80m• PACTwareandDTMsarepartofthestandardscopeofdelivery• Standardmeasurementdeviation≤±3mm• 2-wireconnectiontechnology,minimalwiringexpense• Maintenancefree

BW 26 W• Precisemeasurementindifficultconditions• Producttemperatureupto300°Candoperatingpressureupto120bar• Measuringrange0.5to6m• PACTwareandDTMsarepartofthestandardscopeofdelivery

Contact

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APPLICATION NOTE

Installation on top of tanks

OPTIWAVE 7300 C

BM 26 W

Application 143 EN.indd 2 05.05.2010 15:32:15 Uhr