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