Performance evaluation of a pilot scale vortexing fluidized bed combustor |
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Authors: | Chien-Song Chyang Kuo-Chao Lo Kuo-Lian Wang |
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Affiliation: | (1) Department of Chemical Engineering, Chung Yuan Christian University, 320 Chung-Li, Taiwan, R.O.C. |
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Abstract: | To understand vortexing fluidized bed combustor (VFBC) performances, an investigation was carried out in a 0.45 m diameter
and 4.45 m height pilot scale VFBC. Rice husks, corn, and soybean were used as the biomass feedstock and silica sand serving
as the bed material. The bubbling bed temperature was controlled by using water injected into the bed. The experimental results
show that the excess air ratio is the dominant factor for combustion efficiency. The in-bed combustion proportion increases
with the primary air flow rate and bed temperature, and decreases with the volatile/fixed carbon ratio. The stability constant
is proposed to describe the inertia characteristics of the vortexing fluidized bed combustor. The experimental results indicate
that the stability of the VFBC increases with bed weight and primary air flow rate, but decreases with bed temperature. |
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Keywords: | Vortexing Fluidized Bed Combustor Combustion Proportion Biomass Stability |
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