|
 |
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
May 13-17, 2007 - Vancouver, Canada
| Editors: |
Franco Berruti, The University of Western Ontario, London, Canada
Xiaotao (Tony) Bi, The University of British Columbia, Vancouver, Canada
Todd Pugsley, University of Saskatchewan, Saskatoon, Saskatchewan, Canada |
The articles for these proceedings are peer-reviewed.
|
<Previous article
|
Next article>
|
Fluidized Bed Combustion for Clean Energy
Filip Johnsson, Chalmers University of Technology, Dept. of Energy and Environment, Goteborg, Sweden
ABSTRACT:
This paper gives a brief overview of the status and prospects for fluidized bed
combustion (FBC) for clean energy, with focus on power and heat generation. The
paper summarizes recent development trends for the FB technology and makes an
outlook into the future with respect to challenges and opportunities for the
technology. The paper also identifies areas related to fluidization, which are critical
for the technology and, thus, will require research.
The main advantage with the FBC technology is the fuel flexibility. A compilation of
715 FB boilers (bubbling and circulating) worldwide illustrates the two main
applications for the FBC technology: 1. Small and medium scale heat only or
combined heat and power boilers (typically of the order of or less than 100 MW
thermal), burning biomass or waste derived fuels, including co-firing with coal and 2.
larger (up to 1,000 MWth) power boilers using coal (black coal or lignite) as fuel.
Emerging development includes circulating fluidized beds with supercritical steam
data (power boilers) with the first project coming on-line in the near future and
research on oxy-fuel fired circulating fluidized beds for CO2 capture (O2/CO2 recycle
schemes as well as chemical looping combustion).
Research needs on the topic of fluidization are mainly related to mixing of fuel, solids
and gas, including penetration and mixing of secondary air. The larger the cross
section of the furnace, the more critical is the fuel mixing, i.e. this is critical for large
power boilers. For small and medium scale FBC boilers burning waste and waste
derived fuels, there is also a need to understand fuel and gas mixing in order to be
able to lower the excess air ratio and, thus, to increase the efficiency.
Filip Johnsson, "Fluidized Bed Combustion for Clean Energy" in "The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering", Franco Berruti, The University of Western Ontario, London, Canada
Xiaotao (Tony) Bi, The University of British Columbia, Vancouver, Canada
Todd Pugsley, University of Saskatchewan, Saskatoon, Saskatchewan, Canada Eds, ECI
Symposium Series, Volume RP4 (2007). http://services.bepress.com/eci/fluidization_xii/5
|
|
|
|
 |
|
|
|
|
|
|
|
