Full Content is available to subscribers

Subscribe/Learn More  >

Case Studies: Problems Solving in Fluidized Bed Waste Fuel Incineration

[+] Author Affiliations
Rong Yan, David Tee Liang, Leslie Tsen, Kaiwen Yao, Joo Hwa Tay

Nanyang Technological University, Singapore

Paper No. FBC2003-020, pp. 729-735; 7 pages
  • 17th International Conference on Fluidized Bed Combustion
  • 17th International Conference on Fluidized Bed Combustion
  • Jacksonville, Florida, USA, May 18–21, 2003
  • Conference Sponsors: Advanced Energy Systems
  • ISBN: 0-7918-3680-0 | eISBN: 0-7918-3675-4
  • Copyright © 2003 by ASME


Fluidized bed combustion technology has been widely used as the new, flexible, multi-fuel boiler for waste combustion and energy recovery from low-grade fuels. However, problems such as low thermal efficiency, high emissions and bed agglomeration etc., are still encountered in operation of fluidized beds. Valuable experiences were gained from the two case studies recently conducted regarding wastes combustion in industrial-scale fluidized beds. In the first case, the performance of a fluidized bed combustor for energy recovery from oil sludge was evaluated during the commercial trials. Apart from the sludge characterization and bed material analysis, the combustion efficiency, solid flow balance, on-stack emission of CO, SOx , NOx were addressed, as well as the fluidization quality. Although the system was operated with good combustion efficiency (>99.9%), sulfur dioxide emission (>1,000ppm) was found to be substantially higher than the allowable discharge limit. It was recommended to increase limestone feed rate in order to meet the SO2 emission standard and subsequently, installation of a cyclone is suggested to remove the potential significant increase in ash and fine particles. The second case study focused on the bed agglomeration observed in a fluidized bed incinerator where burning blend of three wastes (i.e., carbon soot, biosludge and fuel oil) are involved. To understand the mechanisms and chemistry related, several analytical approaches are employed to identify the bed materials (fresh sand and degrader sand) and clinkers formed from full-scale incinerator tests. The formation of clinker is believed to follow the mechanism of partial melting and/or reactive liquid sintering. The effects of temperature and blending ratio are tested in a muffle furnace. Carbon soot is believed to be more susceptible than the other two fuels. Thermodynamic multi-Phase multi-Component Equilibrium (TPCE) calculations predict that the main low melting point species are predominant under oxidizing condition, suggesting that reducing conditions might be favorable to restrain the bed agglomeration. This study provides valuable information for the better understanding of the chemistry related to clinker formation; it also helps in developing methods for the control and possible elimination of the bed agglomeration problem for the design fuels.

Copyright © 2003 by ASME
Topics: Fuels , Fluidized beds



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In