Evaluation of the combustion efficiency and emission of pollutants by coal particles in a vortexing fluidized bed

Experiments were carried out in a pilot-scale (a0.45 m i.d.) vortexing fluidized bed combustor (VFBC), with coal particles as the fuel, limestone as sorbent, and river sand as the fluidizing medium. The effects of various operating parameters on the combustion efficiency and the pollutants emitted w...

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Veröffentlicht in:Combustion and flame 1997-07, Vol.110 (1), p.163-172
Hauptverfasser: Lin, C.H., Teng, J.T., Chyang, C.S.
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Chyang, C.S.
description Experiments were carried out in a pilot-scale (a0.45 m i.d.) vortexing fluidized bed combustor (VFBC), with coal particles as the fuel, limestone as sorbent, and river sand as the fluidizing medium. The effects of various operating parameters on the combustion efficiency and the pollutants emitted were investigated. Different formulae for the combustion efficiency are compared. A combustion efficiency of 96% can be easily obtained in a VFBC. Both the NO x and SO x emissions, based on an oxygen content of 6 vol.% in the flue gas, are found to be below 100 ppm. The retention of sulfur by limestone displays a maximum temperature in the bed at 850–880°C.
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subjects Applied sciences
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Furnaces. Firing chambers. Burners
Solid and pulverized fuel burners and combustion chambers
title Evaluation of the combustion efficiency and emission of pollutants by coal particles in a vortexing fluidized bed
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