FLARE RECOVERY SYSTEMS AND THE “FLARE BULLET” Economic approach to flare minimisation - PowerPoint PPT Presentation

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FLARE RECOVERY SYSTEMS AND THE “FLARE BULLET” Economic approach to flare minimisation

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  1. FLARE RECOVERY SYSTEMS AND THE “FLARE BULLET”Economic approach to flare minimisation Jonathan MILES Argo Environmental Engineering Limited

  2. The Environment • CO2 from Power Generation and Fuel Gas • CO2 from Flaring • VOC from tank emissions / transport

  3. Environmental Emissions - UKOOA Flaring rose in UK in 2006 to 1.725 m tonnes CO2 emissions in 2006 fell by about 1m tonnes

  4. UKOOA Commitment 47 • UK Flaring in 2001 represented about 30% of Industry CO2 emissions (5.5 m tonnes) • Started Emission Trading Scheme • Participants agreed target 10% emission reduction below consent agreements

  5. Best In Class? • Analysis 2000-2004 has shown: • Best in class produces 0.63 ave kg CO2/boe Worst in class – 38.61 ave kg • Of worst 10 performers in flaring only 3 had stranded gas reservoirs with 7 connected to gas gathering systems • Foinhaven has stranded gas reservoir but achieves in top 10 CO2 from Flare / boe • 7 of top 10 performers were BP operated

  6. The “Death Zone” on a flare – Turndown to 1-2% Flare and associated equipment damage Wasted Gas – especially if fuel gas deficient – burning diesel CO2 or trading or tax regime. Reputation Potential revenue/cost saving of $1million per year How does reduced flaring save cost

  7. What is zero flaring

  8. Flare Gas Recovery HP flare To flare Bursting Disc LO LO HH HH PT PT FOV N supply 2 HH FE XV Check valve HP K.O. Sources Drum Drain

  9. FOV Layout To flare Bursting disc Tie in 2 Manual valve FOV Tie in 1

  10. Fast Opening Valve • Mokveld valve has SIL-level 3 (MTBF=2160 years of operation to "full stroke") • Tyco valve has SIL-level 3 (MTBF=523 years of operation to "full stroke")

  11. Flare Opening AssembliesRupture disc/Buckling pin valve Buckling pin valve Bursting disc

  12. Flare Gas Recovery – economics • Annual value assuming: • Quota trading • Increased gas export • 2 flare change outs • Annual revenue from flare gas recovery $1,000,000 • Typical Installed Cost - $2-4 million (cheaper on new facilities) • Pay back time will typically be 2-4 years

  13. Low Pressure System

  14. LP ignition system: Automatic Pellet Launching cabinet and air launching bottle Guide pipe Pellet collector unit (optional) Flare Gas Ignition

  15. LP system typical installation

  16. Long-range ignition pellet Armed by the launching pressure Ignite when emerged from guide pipe Independent of emerging velocity Will not ignite if exposed to fire Flare Gas Ignition System

  17. Low pressure Ignition SystemEkulama II - SPDC Nigeria

  18. Low pressure Ignition SystemEkulama II - SPDC Nigeria

  19. Flare Gas Ignition • No moveable parts or electronic equipment located near flare tip • When required maintenance is performed at cabinet • All equipment in heat radiation areas are heat in resistant material • High reliability and long lifetime

  20. Conclusions and Recommendations • Install FGR if technically feasible • Increased revenue typically $1million • Cost to install $2 – 4 million • Install Pellet Ignition system – suit all systems • Increased reliability of ignition • Increased safety • Reduced maintenance cost • Cost approx $150,000