Co-firing of Thai lignite and municipal solid waste (MSW) in a fluidised bed: Effect of MSW moisture content
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Author list: Suksankraisorn K., Patumsawad S., Fungtammasan B.
Publisher: Elsevier
Publication year: 2010
Journal: Applied Thermal Engineering (1359-4311)
Volume number: 30
Issue number: 17-18
Start page: 2693
End page: 2697
Number of pages: 5
ISSN: 1359-4311
eISSN: 1873-5606
Languages: English-Great Britain (EN-GB)
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Abstract
Co-firing investigation of a high-moisture-content municipal solid waste (MSW) with Thai lignite have been performed in a laboratory-scale fluidised bed to study the effects of MSW moisture content on the combustion and emission characteristics of major gaseous pollutants. In this study the comparison of 35%- and 60%-moisture MSWs were tested. The results show that the bed temperature in the case of 35%-moisture content is higher than for in case of 60%-moisture content due to the difference of physical properties of the fuel. The combustion efficiency for the case of 35%-moisture MSW is higher than that for 60%-moisture MSW due to higher bed temperature at lower waste moisture content. The synergistic effect of the co-firing of lignite with MSW reduces the emission of CO leading to increase in combustion efficiency. CO concentration for the case of 35%-moisture content is generally lower, and is much less sensitive to the level of excess air. Both the concentration values of SO 2 and the fuel-S converted are lower for lower moisture content waste, particularly at high mass fraction of waste. The fuel mixture with low-moisture in waste gives higher fuel-N conversion to NO whereas the fuel-N conversion to N2O is higher for higher moisture content waste, particularly at high excess air. ฉ 2010 Elsevier Ltd. All rights reserved.
Keywords
Fluidised bed, Solid waste
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