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Biomass Energy Systems for Steam, Power, and Fuel Production

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Biomass is a renewable fuel that can be used to produce energy and reduce operating costs. This presentation covers the subject from the forest to stack. The emphasis is on the tried and true, with …

Biomass is a renewable fuel that can be used to produce energy and reduce operating costs. This presentation covers the subject from the forest to stack. The emphasis is on the tried and true, with diagrams and photographs of actual equipment and installations. Presenter Thomas F. McGowan is president and founder of TMTS Associates, Inc., a firm that specializes in thermal systems and air pollution control. To view the full presentation, visit http://bit.ly/anBbfh

Published in: Education, Technology, Business

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  • 1. Carbon-Neutral Biomass Energy Systems Produce and Steam, Power, Hot Oil and Hot Gas Thomas F. McGowan, PE TMTS Associates, Inc. 399 Pavillion St. Atlanta, GA 30315 Copyright © 2009 TMTS Associates, Inc.
  • 2.
    • Biomass is a renewable energy source made of biological material that is alive, or was recently alive
    • Examples in decreasing order of importance:
    • Wood
    • Agricultural (ag) waste and crop residue
    • Landfill gas
    • Anaerobic digester gas
    • Pulp mill black liquor (future uses)
    • Energy crops (future potential)
    • Why Biomass?
    • Fuel costs
    • Concern about oil imports vs. homegrown energy
    • Concern about global warming due to Greenhouse gases
    • Concern about supplies and fuel flexibility in case of curtailment (e.g., Hurricanes, winter weather)
    • Biomass is a solution to all the above!
  • 3. Biomass is Greenhouse Gas Neutral!
    • Burning biomass releases CO2, which in turn, goes into the atmosphere, to grow more biomass in a endless loop
    With fossil fuels - one way ticket ! CH Ref: http://ec.europa.eu/environment/climat/kyoto.htm CO2 CHO Combustion Photosynthesis CO2
  • 4. Fuel Value and Cost - Industrial * Data collected October 2009 $5.14 18,266 No. 6 fuel oil $9.31 19,567 No. 2 fuel oil $7.86 (industrial) $19.12 (res/commercial) 21,523 Propane (winter cost higher!) $4.58 * 23,896 Natural gas Approximate Cost, $/MM Btu Gross Heating Value Btu/lb Fuel
  • 5. Fuel Value and Cost Data collected October 2009 $3.20 $2.60 4250 at 50% mc 4250 at 50% mc Whole tree Chips Tub grind waste $1.20 ~6130 at 11% mc Chicken litter Local/internal use $9.80 Ind/$16.80 Res 7650 at 10% mc 7650 at 10% mc Planer shavings Wood Pellets $1.20 4250 at 50% mc Wood waste $2.15 (Utility) $1.49/$1.61 9000 – 15000 ~15,500 Coal Pet coke/TDF Approximate Cost, $/MM Btu Gross Heating Value Btu/lb Fuel
  • 6. Typical Material Flow Steam, hot gas & power Truck dump Disc screen Hog Storage silos (Optional) Rotary dryer Surge bin Combustor APC Bucket elevator Ash to land application Over-thick chips
  • 7. Wood Fired Boilers
    • Small units, HRT (horizontal return tubular) boilers with refractory firebox (5-60K lb/hr steam)
    • Larger units are water tube (50-500K+ lb/hr stream)
    • Usually use pneumatic spreader stokers for suspension/grate burning; some sloped grates
    • Larger sizes (e.g., 500K lb/hr steam) now use fluid bed combustors
    • Many burn oil, gas, coal as aux fuel for load control, startup, and to maintain furnace temp
  • 8. Wood Fired Boiler Systems Used with permission: Indeck Keystone Energy Used with permission Hurst Boiler Industrial Process Steam Indeck/Keystone Decker Energy 48 MW Power Plant
  • 9. National Wood Resource Oak Ridge study: Sustainable harvest 350 million dry tpy wood residue Add to that ag burn or bury of 900 million tpy = 1.25 billion tpy In comparison, annual coal production 1.17 billion tons, equivalent to 1.4 billion tons of biomass
  • 10. The Book for Those Who Want More Details… Available from John Wiley & Sons and Amazon.com http://tinyurl.com/Amazon-biomass-book For further information, contact Tom McGowan TMTS Associates, Inc. 404 627 4722 [email_address] http://tmtsassociates.home.mindspring.com View the complete webinar .