Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace

Po Shen Lin, Zu Erh Chen, Ming-Hsun Wu

Research output: Contribution to conferencePaper

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 languageEnglish
Publication statusPublished - 2013 Jan 1
Event9th Asia-Pacific Conference on Combustion, ASPACC 2013 - Gyeongju, Korea, Republic of
Duration: 2013 May 192013 May 22

Other

Other9th Asia-Pacific Conference on Combustion, ASPACC 2013
CountryKorea, Republic of
CityGyeongju
Period13-05-1913-05-22

Fingerprint

Straw
Furnaces
Coal
Flow simulation
Chemical analysis
Fuel burners
Momentum
Particle size
Heating
Oxygen
Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Engineering

Cite this

Lin, P. S., Chen, Z. E., & Wu, M-H. (2013). Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace. Paper presented at 9th Asia-Pacific Conference on Combustion, ASPACC 2013, Gyeongju, Korea, Republic of.
Lin, Po Shen ; Chen, Zu Erh ; Wu, Ming-Hsun. / Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace. Paper presented at 9th Asia-Pacific Conference on Combustion, ASPACC 2013, Gyeongju, Korea, Republic of.
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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.",
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Lin, PS, Chen, ZE & Wu, M-H 2013, 'Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace' Paper presented at 9th Asia-Pacific Conference on Combustion, ASPACC 2013, Gyeongju, Korea, Republic of, 13-05-19 - 13-05-22, .

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 conferencePaper

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AU - Lin, Po Shen

AU - Chen, Zu Erh

AU - Wu, Ming-Hsun

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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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Lin PS, Chen ZE, Wu M-H. Numerical study on oxy-co-firing of pulverized coal and rice straw in a 300kW research furnace. 2013. Paper presented at 9th Asia-Pacific Conference on Combustion, ASPACC 2013, Gyeongju, Korea, Republic of.