Delayed Coker Blowdown System Water Reuse
Delayed Coker Blowdown SystemWater ReusePresented by Mitch Moloney of ExxonMobil Research & st Hungary coking.comMJ Moloney - ExxonMobilaThis material is not to be reproduced without the permission of Exxon Mobil Corporation and coking.com.May-2012 coking.comOctober-20170
Delayed Coker Blowdown System Water ReuseTopics:(1) Blowdown System Overview(2) Recycling BD Water Constituents, Methods, Incentives & Risks(3) Water System Layouts(4) Coker Water Balance(5) Adding Flash and/or Bleach FacilitiesSpecial acknowledgement to Fritz Bernatz for his detailedevaluation and development of this technologyOctober-2017 coking.com Budapest1
Delayed Coker Blowdown System Water ReuseGeneral Overview of BD System Operations(1) Receive Coke Bed Vapors during Stripping & QuenchingHighest Normal Hydrocarbon Load During Steam StrippingHighest Normal Steam Load During Peak Quenching(2) Receiving Coke Drum and/or Heater PRV DischargesHighest Abnormal Hydrocarbon Loads Majority of newer units receive the coke drum PRV Older units may receive furnace PRV because the WilsonSnyder was not designed for pump shut-in pressure(3) Receiving Wet (and Dry) Coke Drum Warm-Up Condensate / Gas(4) Receive Start-Up and Shutdown Drain Slops(5) Handle Foam Entrainment or a Coke FoamoverOctober-2017 coking.com Budapest2
Delayed Coker Blowdown System Water ReuseGeneral Overview of BD System Operations (cont’d)ObjectivesCool Vapors on a Batch BasisSeparate feeds into five products Heavy BD oil Light BD oil Non-condensable Gas Sour Water CokeBe a Robust and Reliable OperationOctober-2017 coking.com Budapest3
Delayed Coker Blowdown System Water ReuseModern Blowdown Design - 1BD CondensersPRV’s 375 FLow Pres Lt Gases 375 F150 FHeavyDrainsFlareSeal Pot8 - 40 psig2 - 10 psig300 FWaterCoolerQuenchVaporsSettler 375 FWarm-UpVaporsBD GasDemulsifierHotContactorNCMin FlowSWSLt SlopNCMake-up Gas OilQuenchWater TankSteam Heater375 FNCSlop150 FWarm-UpCondensateOctober-2017 coking.com Budapest4
Delayed Coker Blowdown System Water ReuseModern Blowdown Design - 2BD CondenserGAS TO FLAREBypassGAS TO WGCSettlerFROM COKE DRUMSAWATER TO QUENCH / CUTTINGWATER TANKHotContactorWATER TO SWSASETTLED WATERWATER TODESUPERHEATINGLIGHT SETTLED OILHEAVY BLOWDOWN OILNCNO30 kg/cm2 steamBD OIL PRODUCTBD OIL PRODUCT TO FCC FEEDCondensateOctober-2017 coking.com Budapest5
Delayed Coker Blowdown System Water ReuseSmall Blowdown System & Water TankHot ContactorBD CondenserFin FansCutting & QuenchWater TankOctober-2017 coking.com Budapest6
Delayed Coker Blowdown System Water ReuseBlowdown Condenser Fin FansBD CondenserInletDistributionPipingINLETFin Fan BayIsolationValvesOctober-2017 coking.com Budapest7
Delayed Coker Blowdown System Water ReuseDCU Blowdown Water Constituents*H2S, NH3 and phenols will vary as the coke drum cycles from steam stripping tothe end of coke bed quenching. Many factors will affect the concentrations:- Resid type (S, N, geographical origin)- Steam stripping operations (timing, duration, rates)- Coke Bed size- Blowdown System operations Is water recycled for vapor desuperheating? Size of BD Settler Are downstream settling tanks used?BD StageSteamQuench - startQuench - midQuench - endH2SNH3Phenols100 - 200100 - 400130 - 50020 - 12040 - 120100 - 175150 - 20050 - 20015 - 6015 - 6015 - 5015 - 20* Proper sampling protocols areneeded to get accurate resultsOctober-2017 coking.com Budapest8
Delayed Coker Blowdown System Water ReuseRecycle of Condensed Blowdown Water(1) Joliet Refinery has been recycling blowdown water since start-up in early 1970’s Cited in Oil & Gas Journal 23-apr-1973 Heritage Mobil Oil technology Blowdown water is flashed in closed-roof tank with vapor recovery Coker water purge rate is high due to watery sludge addition andfines maze clean out with fire water, which reduces odors also due todilution of constituents(2) A refiner, no longer owned by ExxonMobil, has been recycling settledblowdown water to the cutting/quench water tank for over 30 years Sodium Hypochlorite (Bleach) is added to cutting water inthe fines settling lane Coker water system purge rate was adjusted tobalance sludge water additionOctober-2017 coking.com Budapest9
Delayed Coker Blowdown System Water ReuseIncentives to Recycle Blowdown WaterReduce Sour Water Stripper (SWS) LoadingsA typical SWS consumes around 1.3 lb of 150# steam / gal of feed,which allows the energy incentive to be calculated40,000 gal /drum * 1.5 drums/D/train * 365 D/yr* 0.95 SF * 1.3 lb/gal * Y/1000 lbs of steam ZZZ k / yr for each coke drum trainconservatively assuming an 18 hr coking cycleReduced inorganic loading to the Waste Water Treatment PlantAvoidance of capital expenditures for more SWS capacityReduced raw water make-up to the DCUElimination of mold in the quench/cutting water system and areaOctober-2017 coking.com Budapest10
Delayed Coker Blowdown System Water ReuseRisks Considered with Recycling BD WaterExposure to low level H2S and NH3 emissions in the airOdorsIncrease in dissolved hydrocarbon levels in the recycled water Function of BD System Water-HC Separation EfficiencyFormation of chlorinated hydrocarbonsIncreased corrosion in cutting/quench water systemWWT Effects:- Excess chlorine- SO4- Chloramines- AOX (Adsorbable Organic Halides)All risks were evaluated and determined to beacceptable with proper facilities design andproceduresOctober-2017 coking.com Budapest11
Delayed Coker Blowdown System Water ReuseCoker Water System - SluicewayOctober-2017 coking.com Budapest12
Delayed Coker Blowdown System Water ReuseCoker Water System - PitOctober-2017 coking.com Budapest13
Delayed Coker Blowdown System Water ReuseCoker Water System - PadOctober-2017 coking.com Budapest14
Delayed Coker Blowdown System Water ReuseWater BalanceWater Added to System: Big Steam Sludge Water Pump Seal and Instrument Flushes Water added for cleaning purposes RainWater Leaving System: Coke Moisture Evaporation Blowdown Water – Yes or No? Addition or Purge?October-2017 coking.com Budapest15
Delayed Coker Blowdown System Water ReuseWater Balance – The NumbersBasis: 50 kB/D or 331 m3/hr or 8230 metric ton/D 4-drum coker on 14 hour coking cycle; 28 hr drum cycleBase CaseBD to SWSWater Added to System Big Steam Sludge Rain (annual avg) Pump Seal and Instrument Flushes Water added for cleaning purposesBD WaterSludgeRecycledAddedkgal / DaySludge Fines LaneCleaningBaseBD WaterSludgeRecycledAdded3m /DSludge Fines 630584906305849170630228491706376304Water Leaving System: Coke Moisture Blowdown Water 78011Make-up / (Purge)16735(10)(30)631131(39)(115)Drain Cutting Water Recycled Water from Pit/Pad 220360580kgal/DOctober-2017 coking.com Budapest83313632196m3/D16
Delayed Coker Blowdown System Water ReuseCoker Water System - PadOctober-2017 coking.com Budapest17
Delayed Coker Blowdown System Water ReuseFlashing the Blowdown Water Minimum of 25% removal of H2S and NH3 at 0.14 barg (2 psig), Flashing at lower pressure is recommended to increase H2S and NH3removal, but especially to remove hydrocarbons Proper upstream blowdown operations are needed to properlyseparate oil and water Steam Eductor on flash drum can create a very low pressure (0.01 barg)October-2017 coking.com Budapest18
Delayed Coker Blowdown System Water ReuseBleach Chemistry – H2SSulfide ReactionsAt coker BD water pH range of 7.5 to 9.0 sulfides are typically in the form HSRapid ReactionsBleach dissociationNaOCl H2O HOCl Na OH HOCl H OCl–(In equilibrium at 40-60% range based on pH)Reaction of Bleach with sulfides at low excess chlorine (under acidic conditions)H2S HOCl H S0 Cl - H2OReaction of Bleach with sulfides (under alkaline conditions)H2S 4 NaOCl H2SO4 4 NaClOctober-2017 coking.com Budapest19
Delayed Coker Blowdown System Water ReuseBleach Chemistry – NH3Ammonia ReactionsChlorine/Ammonia reactions at a ratio of less than equilmolar will not formfree chlorine. Blowdown water treatment will be in dilute aqueous solutions.HOCl NH3 NH2Cl (monochloroamine) H2O- Ratio of chlorine to ammonia is equimolar (5:1 by wt) or less- Monochloramine preferred at pH 7.5Organic compoundsR HOCl RCl H2O- Expected organic compounds are slow to react.- Any excess bleach will react with ammoniaMonochloroamines are slow to react with organic matterOctober-2017 coking.com Budapest20
Delayed Coker Blowdown System Water ReuseAOX Considerations for the Waste Water Treating Plant Adsorbable Organic Halides (AOX) is a measure of the organichalogen load. These organic halides are released in wastewaterfrom the oil, chemical, and paper industries. Chloro-organics are a type of AOX Chloro-organics may be formed by bleach addition to the Blowdownreuse water and may be sent to the WWTP through the water purge. This should be considered relative to WWTP permits.October-2017 coking.com Budapest21
Delayed Coker Blowdown System Water ReuseExample Bleach Operations for a Hypothetical DCUBasis 50 kBD (331 m3/h) fresh feed Sulfur 4.5 wt%; Nitrogen 0.8 wt%Design Basis needs to determine how much of the worst case sulfidesand ammonia need to be treated. One option is: Sulfide treatment at stoichiometric level Ammonia treatment at 50% stoichiometric levelOther factors to consider: Benchmarking with other water-chemical dosing programs Can you take credit taken for pre-flash of water?Facility design should have % overdesign factorOctober-2017 coking.com Budapest22
Quench - start 100 - 400 100 - 175 15 - 60 Quench - mid 130 - 500 150 - 200 15 - 50 Quench - end 20 - 120 50 - 200 15 - 20. 9 Delayed Coker Blowdown System Water Reuse October-2017 coking.com Budapest Recycle of Condensed Blowdown Water Cited in Oil & Gas Journal 23-apr-1973 (1) Joliet R
found the resurgence of Coker Creek in the time of the Civil War (1861-1865), as the place of a military encampment referred to as Camp Coker Creek. The endeavor was then to figure out the role that Coker Creek played in the War Between the States, and to connect, if proper to do so, the archaeological camp remains at 40MR708 with the Camp
Coker University is a student-centered, comprehensive university. It is dedicated to providing every . Undergraduate Day Program 7 Undergraduate Adult Degree and Online Programs 9 Graduate Program 11 INTRODUCING COKER UNIVERSITY 13 . Psychology 117 Sociology 119 Theatre 120 MASTERS PROGRAMS 124
Purchasing and installing an automatic blowdown control system can cost from 2,500 to 6,000 with a mostly 1- to 3- year payback period on the investment. A complete system should consist of a low- or high-pressure conductivity
CHS-150* 15.3 150 5 50A 60A 30 1 300 4/0 181 260 452 130 CHS-180* 18.4 180 6 50A 60A 30 1 300 250 217 3 30 543 . manual blowdown switch until water level falls enough to trip cutout switch. Close drain valve or release manual blowdown switch. If
blowdown tank or separator or an air gap that will allow the blowdown water to cool to at least 140 F (60 C) and reduce the pressure to 5 psig (34 kPa) or less. Proposed Text ADDITION: For equipment rooms with heating boilers that use glycol, provide for the disposal of glycol in accordance with applicable regulations. 2
The non-contact cooling water includes cooling tower blowdown, chiller blowdown, chiller flushing/bleed streams and chiller condensate. When discharging, samples taken in compliance with the monitoring requirements below shall be taken at a point representative of the discharge but prior to entry into Pierce Ditch.
Calculation EC-041-0508, Revision 4, Cooling Tower Evaporation and Blowdown Rates for Power Uprate (NRC Document Request 109) Far Informition Only, PCAF #2004-1318 Page 4 of 4 NUCLEAR ENGINEERING CALCULATION COVER SHEET . The cooling tower and blowdown line designs have not been changed. c. The calculated 'required' service water per PPL .
Autodesk AutoCAD Architecture 2017 Fundamentals 3-1. Lesson 3 . Floor Plans . The floor plan is central to any architectural drawing. In the first exercise, we convert an AutoCAD 2D floor plan to 3D. In the remaining exercises, we work in 3D. Exercise 3-1: Going from a 2D to 3D Floor plan Drawing Name: New . Estimated Time: 45 minutes
