Abstract
This work aims to reveal the characteristics of pulverized coal and straw oxy-co-firing in a 300 kW vertical research furnace through reacting flow simulations. Effects of coal/straw blending ratio are systematically assessed. A 3-D model of the swirl burner and the furnace is first constructed for the simulations. Composition of oxidizer is 30% O2 and 70% CO2 and the excess oxygen is fixed to 15% in this study. It is found that the distance required for devolatilization and the low temperature region in the central region are extended with greater particle size and higher blending ratio. To maintain the thermal loading while increasing the blending ratio, the overall fuel feeding rate is increased since the heating value of straw is half of coal. The increase of fuel momentum also alters the recirculation flows. NO and SO2 emissions are influenced by the composition of fuel blends, i.e. blending ratio. The NO concentration increases and SO2 decreases with more straw in the fuel.
| Original language | English |
|---|---|
| Publication status | Published - 2013 Jan 1 |
| Event | 9th Asia-Pacific Conference on Combustion, ASPACC 2013 - Gyeongju, Korea, Republic of Duration: 2013 May 19 → 2013 May 22 |
Other
| Other | 9th Asia-Pacific Conference on Combustion, ASPACC 2013 |
|---|---|
| Country | Korea, Republic of |
| City | Gyeongju |
| Period | 13-05-19 → 13-05-22 |
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All Science Journal Classification (ASJC) codes
- Environmental Engineering
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Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace. / Lin, Po Shen; Chen, Zu Erh; Wu, Ming Hsun.
2013. Paper presented at 9th Asia-Pacific Conference on Combustion, ASPACC 2013, Gyeongju, Korea, Republic of.Research output: Contribution to conference › Paper
TY - CONF
T1 - Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace
AU - Lin, Po Shen
AU - Chen, Zu Erh
AU - Wu, Ming Hsun
PY - 2013/1/1
Y1 - 2013/1/1
N2 - This work aims to reveal the characteristics of pulverized coal and straw oxy-co-firing in a 300 kW vertical research furnace through reacting flow simulations. Effects of coal/straw blending ratio are systematically assessed. A 3-D model of the swirl burner and the furnace is first constructed for the simulations. Composition of oxidizer is 30% O2 and 70% CO2 and the excess oxygen is fixed to 15% in this study. It is found that the distance required for devolatilization and the low temperature region in the central region are extended with greater particle size and higher blending ratio. To maintain the thermal loading while increasing the blending ratio, the overall fuel feeding rate is increased since the heating value of straw is half of coal. The increase of fuel momentum also alters the recirculation flows. NO and SO2 emissions are influenced by the composition of fuel blends, i.e. blending ratio. The NO concentration increases and SO2 decreases with more straw in the fuel.
AB - This work aims to reveal the characteristics of pulverized coal and straw oxy-co-firing in a 300 kW vertical research furnace through reacting flow simulations. Effects of coal/straw blending ratio are systematically assessed. A 3-D model of the swirl burner and the furnace is first constructed for the simulations. Composition of oxidizer is 30% O2 and 70% CO2 and the excess oxygen is fixed to 15% in this study. It is found that the distance required for devolatilization and the low temperature region in the central region are extended with greater particle size and higher blending ratio. To maintain the thermal loading while increasing the blending ratio, the overall fuel feeding rate is increased since the heating value of straw is half of coal. The increase of fuel momentum also alters the recirculation flows. NO and SO2 emissions are influenced by the composition of fuel blends, i.e. blending ratio. The NO concentration increases and SO2 decreases with more straw in the fuel.
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M3 - Paper
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