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Smart LDAR: October 30, 2002

Smart LDAR: October 30, 2002. Dave Markwordt, Bill Grimley, Tom Logan. Outline. Fugitive Emissions & Why We Control Them What is Smart LDAR? The Smart LDAR Instrument Regulatory Issues with Smart LDAR Next Steps. Fugitive Emissions.

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Smart LDAR: October 30, 2002

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  1. Smart LDAR:October 30, 2002 Dave Markwordt, Bill Grimley, Tom Logan

  2. Outline • Fugitive Emissions & Why We Control Them • What is Smart LDAR? • The Smart LDAR Instrument • Regulatory Issues with Smart LDAR • Next Steps

  3. Fugitive Emissions • Routine leakage from valves, pumps, flanges, connectors, etc. • Can aggregate to significant tonnage • Can be hazardous air pollutants with direct health impact • Can be controlled by equipment design or,more commonly, leak detection & repair programs

  4. Most current LDAR programs require visiting every component regularly (e.g.. monthly).

  5. 84% of emissions come from 0.13% of components Most equipment doesn’t leak Taback et al., 1997, API Publ 310, “Analysis of Refinery Screening Data”

  6. What Is Smart LDAR? • SmartLeak Detection And Repairis nothing more than the efficient locating and repair of the relatively small number of leaky valves, pumps, connectors, etc., in a large population of process equipment.

  7. Smart LDAR Conceptual Framework • Use remote sensing technology to quickly & economically identify significant leakers • Scan often enough to catch significant leakers before emissions accumulate • Repair (same as existing program)

  8. Smart LDAR Conceptual Framework (cont.) • Tradeoffs include: • More frequent detection scans but fewer repairs(don’t repair little leakers) • More expensive equipment but less manpower for inspection and less repair cost (?)

  9. Smart LDAR Instrument • API helping develop (with DOE & EPA)Backscatter Absorption Gas Imaging (BAGI) by LIS • BAGI scans laser over imaged area • Reflected laser captured by camera to form image of area • Target gas absorbs laser and image appears black

  10. Instrument Development • Commercial product: • GasVue from Laser Imaging Systems • Uses CO2 laser to see SF6 • Being adapted by Sandia National Labs • Changing to PPLN laser to look at H-C bond stretch(periodically-polled Lithium Niobate) • Making man-portable and intrinsically safe • Issues include laser power, battery life, weight • Largely paid for by DOE & EPA

  11. Shoulder-mounted camera Shoulder-mounted camera Backpack power/control unit

  12. Does Instrument Work? • 1998 petrochem plant test • 1999 refinery test • 2001 laboratory tests • 2002 refinery test delayed due to instrument problems • Various glitches & gremlins in the system • Fully expect to establish reliable field detection limit

  13. Smart LDAR Regulatory Progress • 2000 report established “equivalence” criteria between Smart LDAR and Method 21 • Required sophisticated Monte Carlo analysis • Determined relationship between frequency of scan and required reliable detection limit

  14. Open Issues / Next Steps • Reliability in field use • Detection limit and subjectivity of interpretation • Standardized Procedures &Recordkeeping • Commercial availability of BAGI units • Alternative technologies development

  15. Summary • Significant incentives exist to continue developing Smart LDAR technologies & regulations • Laser BAGI technology poised to achieve field demonstration status for a man-portable unit • All participants in this multi-stakeholder, multi-disciplinary effort are optimistic of a successful conclusion.

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