Sludge from wastewater treatment plants in five Swedish pulp and paper mills has been burned together with wood in a circulating fluidised bed (CFB) boiler. The sludge was either mechanically dewatered or pre-dried. The mechanically dewatered sludge had to be fed with a pump, but the pre-dried sludge could be fed by the fuel feed system normally used for coal, wood chips or wood pellets. In parallel to the combustion tests in the CFB boiler the sludges were also investigated as single fuels in a small laboratory FB. The Swedish pulp and paper industry produces three major fractions of sludge: pure fibre sludge, sludge produced by employing a precipitation species like ironaluminiumsulphate, and finally, sludge subjected to biological cleaning. The way of production of the sludge influences its content of, for example, nitrogen, sulphur and chlorine, but the composition of the sludge is also influenced by the pulp and paper process. The present measurements show that the concentrations of nitrogen, sulphur and chlorine in the sludge have a great impact on the corresponding gaseous emissions from combustion. Actions to prevent these emissions could be necessary, depending on the origin of the sludge and treatment process used. In the present project all sludges were burned with wood-pellets as the main fuel under identical operating conditions, typical for a CFB boiler. Wood pellets were chosen as a well defined, low-polluting fuel that makes comparison of emissions from the sludges clear. Co-combustion with wood-pellets has the advantage of enabling operation also with wet sludges that cannot be used as single fuels without pre-drying. No actions were taken to improve sulphur and chlorine retention, by for example adding limestone. From a combustion point of view the co-combustion works well with low levels of carbon monoxide present in the flue gas and no light hydrocarbons.
Skip Nav Destination
17th International Conference on Fluidized Bed Combustion
May 18–21, 2003
Jacksonville, Florida, USA
Conference Sponsors:
- Advanced Energy Systems
ISBN:
0-7918-3680-0
PROCEEDINGS PAPER
Co-Combustion of Pulp- and Paper Sludge With Wood: Emissions of Nitrogen, Sulphur and Chlorine Compounds Available to Purchase
Lars-Erik A˚mand,
Lars-Erik A˚mand
Chalmers University of Technology, Go¨teborg, Sweden
Search for other works by this author on:
Bo Leckner,
Bo Leckner
Chalmers University of Technology, Go¨teborg, Sweden
Search for other works by this author on:
Solvie Herstad Sva¨rd,
Solvie Herstad Sva¨rd
Scandinavian Energy Project AB, Go¨teborg, Sweden
Search for other works by this author on:
Marianne Gyllenhammar,
Marianne Gyllenhammar
Scandinavian Energy Project AB, Go¨teborg, Sweden
Search for other works by this author on:
David Eskilsson,
David Eskilsson
SP, Swedish National Testing and Research Institute, Bora˚s, Sweden
Search for other works by this author on:
Claes Tullin
Claes Tullin
SP, Swedish National Testing and Research Institute, Bora˚s, Sweden
Search for other works by this author on:
Lars-Erik A˚mand
Chalmers University of Technology, Go¨teborg, Sweden
Bo Leckner
Chalmers University of Technology, Go¨teborg, Sweden
Solvie Herstad Sva¨rd
Scandinavian Energy Project AB, Go¨teborg, Sweden
Marianne Gyllenhammar
Scandinavian Energy Project AB, Go¨teborg, Sweden
David Eskilsson
SP, Swedish National Testing and Research Institute, Bora˚s, Sweden
Claes Tullin
SP, Swedish National Testing and Research Institute, Bora˚s, Sweden
Paper No:
FBC2003-097, pp. 871-882; 12 pages
Published Online:
December 22, 2008
Citation
A˚mand, L, Leckner, B, Sva¨rd, SH, Gyllenhammar, M, Eskilsson, D, & Tullin, C. "Co-Combustion of Pulp- and Paper Sludge With Wood: Emissions of Nitrogen, Sulphur and Chlorine Compounds." Proceedings of the 17th International Conference on Fluidized Bed Combustion. 17th International Conference on Fluidized Bed Combustion. Jacksonville, Florida, USA. May 18–21, 2003. pp. 871-882. ASME. https://doi.org/10.1115/FBC2003-097
Download citation file:
9
Views
Related Proceedings Papers
Related Articles
The Study of Combustion of Municipal Waste in a Fluidized Bed Combustor
J. Energy Resour. Technol (June,2006)
The Study of Partitioning of Heavy Metals During Fluidized Bed Combustion of Sewage Sludge and Coal
J. Energy Resour. Technol (June,2006)
Advanced Coal-Fired Power Plants
J. Energy Resour. Technol (March,2001)
Related Chapters
ASME Section VI: Recommended Rules for the Care and Operation of Heating Boilers
Companion Guide to the ASME Boiler & Pressure Vessel Codes, Volume 1 Sixth Edition
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies
Gas-Fluidized Beds
Two-Phase Heat Transfer