The effect of biomass co-combustion in a CFB boiler on solids accumulation on surfaces of P91 steel tube samples |
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| Affiliation: | 1. Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Armii Krajowej 19, 42-201 Częstochowa, Poland;2. Faculty of Environmental Engineering and Biotechnology, Dąbrowskiego 73, 42-201 Częstochowa, Poland;1. Institute for Ferrous Metallurgy, K. Miarki 12-14, 44-100 Gliwice, Poland;2. AGH University of Science and Technology, Faculty of Non-Ferrous Metals, Department of Metal Working and Physical Metallurgy of Non-Ferrous Metals, Al. Mickiewicza 30, 30-059 Krakow, Poland;3. Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego St. 18a, 44-100 Gliwice, Poland;1. Bialystok University of Technology, Wiejska 45C, Bialystok 15-351, Poland;2. The Szewalski Institute of Fluid-Flow Machinery of Polish Academy of Sciences, Fiszera 14, Gdansk 80-231, Poland;1. Centre for Energy (M473), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;2. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China |
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| Abstract: | The paper describes the results of industrial tests associated with the co-combustion of biomass and agromass with coal and focused on diagnostics and assessment of the effect of fuel type on the accumulation of solids on the surface of P91 steel tube samples placed in the vicinity of steam superheater in a commercial large-scale (over 400 MW) circulating fluidized bed boiler.Analysis of samples indicated the effect of fuel type, as well as the location of the area on the steel tube on the rate of solids accumulation. Alkali compounds were quite uniformly distributed at both front and rear sections of the steel tube samples, while calcium and sulfur components were mainly found in the front area. The average solids accumulation rates calculated for the rear areas of P91 steel tube samples were roughly two times higher than those for the front ones. The highest solids accumulation rate on the front area (1.04·10−9 ms−1) was calculated for the case of agromass co-combustion with coal. |
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| Keywords: | Co-combustion Biomass P91 steel Solids accumulation Large-scale CFB |
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