Fouling is a major concern in coal-fired power plants caused by fly ash deposit on the heat exchanger tubes that decreases the overall heat transfer coefficient to water-steam mixture. Fouling has been characterized by weakly bound-loose form, which may be removed by various methods, such as soot-blowing, blast, and sand blowing. We have carried out experimental and modeling work on fouling to develop a methodology by which the thermal conductivity of the ash deposit would be determined in a way similar to the fouling process prevailing in real systems. For that we used tubes identical in material, diameter and temperature to those used in many utility boilers. In the experimental work we placed a tube in an axially symmetric 50 kW furnace, and tested fouling from three coals, bituminous and sub-bituminous. We also developed a dynamic model for the prediction of the ash deposition growth and its heat resistance. Comparison of the model prediction and experimental results yielded satisfactory fit. Consequently, thermal resistance of heat exchanger tuber with ash deposit of those coals was determined.
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ASME 2008 Power Conference
July 22–24, 2008
Lake Buena Vista, Florida, USA
Conference Sponsors:
- Power Division
ISBN:
0-7918-4832-9
PROCEEDINGS PAPER
Fouling of Heat Exchanger Tubes in Pulverized-Coal-Fired Combustion Chambers Available to Purchase
Efim Korytni,
Efim Korytni
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Yuli Berman,
Yuli Berman
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Boris Davidson,
Boris Davidson
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Miron Perelman,
Miron Perelman
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Roman Saveliev,
Roman Saveliev
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Ezra Bar-Ziv
Ezra Bar-Ziv
Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Efim Korytni
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Yuli Berman
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Boris Davidson
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Miron Perelman
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Roman Saveliev
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Ezra Bar-Ziv
Ben-Gurion University of the Negev, Beer-Sheva, Israel
Paper No:
POWER2008-60044, pp. 37-40; 4 pages
Published Online:
July 8, 2009
Citation
Korytni, E, Berman, Y, Davidson, B, Perelman, M, Saveliev, R, & Bar-Ziv, E. "Fouling of Heat Exchanger Tubes in Pulverized-Coal-Fired Combustion Chambers." Proceedings of the ASME 2008 Power Conference. ASME 2008 Power Conference. Lake Buena Vista, Florida, USA. July 22–24, 2008. pp. 37-40. ASME. https://doi.org/10.1115/POWER2008-60044
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