rocsole - tank liquid scanning service - case …...5000 m3 oil storage tanks in an oil refinery....

©RocsoleLtd/ Confidential

Tank LiquidScanning Service

CaseStudy:Interface Detection andWater

Contentofoil Measurement inOilRefinery StorageTanks

©Rocsole Ltd/ Confidential

Tank LiquidScanning Service

TankLiquidScanningServicedetectsandprofilesmultipleinterfacesandmeasureswatercontentoftheproductlayerinsideindustrialtanks.

Scanningsensor

Report

BENEFITS§ Improvedoutput(oil)quality§ Optimizedresidencetime§ Optimizedtankmaintenanceby

accuratedetectionofwaterbottom andsedimentlayer

§ Verificationofmanualsampling§ Optimizedchemicalinjection

©Rocsole Ltd/ Confidential

Scanning SystemComponents

Scanningsensor:⌀ 6.3”(16cm),length13.8”(35cm)

Laptop

Datacabinet:110/230V50-60Hz

Tripod

Zincwire

Cables:98-164ft.(30-50m) Electrodes

©Rocsole Ltd/ Confidential

Scanning Procedure1. Scanningsystemistakentothetopofthetank.2. Scanningsensorisloweredtothetankthroughaninspectionhatchuntilitreachesthethe

oillayer.3. Systempoweristurnedon.4. Scanningsensorisloweredthroughthetankin20”(50cm)intervals,stoppingthesensor

for30secondsduringeachintervaltoperformthemeasurement.5. Whenthebottomofthetankisreached,thesystempoweristurnedoffandthescanning

sensorisliftedupfromthetank.6. Rocsole calculatesthetankprofilebasedonthemeasurementdatareceivedfromthe

scanning.Thecalculationsarereadywithintwohoursafterfinishingthemeasurement.

NOTES:§ NitrogenpurgeisrecommendedinATEX/IECEx zones.§ Thecustomerguaranteesthesafetyofthemeasurementasnon-ATEX/IECEx system

isusedforthescanning.ThecustomerneedstoprovideallnecessaryinformationtoRocsole forthesafetyevaluation.

©Rocsole Ltd/ Confidential

CaseStudy:Goals

Theaimwasperformtwoscanningroundstotwo5000m3oilstoragetanksinanoilrefinery.Thetankswereknowntocontainlayersofair,oil,amudlikewater/metalsedimentonthebottom.Thegoalsofthefirsttankscanningroundwere:§ Todetectlocationoftheinterfaces§ Tofindoutifanemulsionlayerexistsbetween

theoilandwater/metalsedimentlayer

Thegoalofthesecondtankscanningroundwas:§ Tomeasurewatercontentofoillayertodefine

optimalresidencetime

©Rocsole Ltd/ Confidential

CaseStudy:Setup

§ Rocsole’s tripodtypeofscanningsystemwithwireandscanningsensorincludedwasusedtolowerandliftthescanningsensorthroughahatchontopofthebothtanks.

§ Thewirehadmarksevery20”(50cm)toindicatethedepthofthesensorduringthescanning.

§ Datacablesofthesensorwerereeledaroundseparatecablereels.

§ Scanning was performed during the lowering phase.

SCANNINGSENSORBEFORE

MEASUREMENT

SCANNINGSENSORAFTER

MEASUREMENT

NOTE:Rocsole’s scanning system works eventhe scanning sensor ishighly contaminated.

©Rocsole Ltd/ Confidential

CaseStudy:Results ofthe Round 1Interfaces &EmulsionLayer

COMPOSITIONDETECTION§ Thepermittivityvariesasafunctionof

tankheightanditispossibletoseparatethecompositionoftheoil+sludgetoreducecleaningcosts.

§ Locationoftheinterfacesandthicknessoftheemulsionlayerweredetectedaccurately.

§ Tank1(red):Thetrendchangeissharp,becausethereisacleaninterface.

§ Tank2(blue):Thetrendchangebecomesmoregradualastheemulsionelectricalpropertiescreateatransitionbetweenthatofoilandwater.

Air

Oil

Sediment(water&metals)

Emulsion

©Rocsole Ltd/ Confidential

WATERCONTENTINOILMEASUREMENT§ Tank1(blue):Oilhasbeensettlingfor7days

andtheprofileisvertical§ Tank2(red): Oilhasbeensettlingfor3days→ Redtrendlineindicatesthereisstillwater

intheoillayer.Thecustomer’sgoalistominimizethewaterinoiltransferredtotherefinery,soitwasconcludedthatthesettlingtimeofthetank2needstobeextended.

Tank1Tank2

WatercontentWatercontent

OilLayerT

hickne

ss(m

)

CaseStudy:Results ofthe Round 2Water ContentinOil Layer

©Rocsole Ltd/ Confidential

https://tank.rocsole.fi/#/map

ROCSOLEWEBROC

Tank Profile ManagementOnlinePlatform

Rocsole offersanonlineplatformformanagingtankscanningneedsthroughoutthewholesite.Itstoresthescanningdataandindicatestheupcomingscanningneedsofthetanksinthesite.

©RocsoleLtd/ Confidential

RocsoleContacts

©RocsoleLtd/ Confidential

PasiLaakkonenCEO

+358401478797pasi.laakkonen@rocsole.comwww.rocsole.com

Contact