This research investigated the effects of the specific primary (under-fire) air flowrate (air) on the combustion behavior of a 50–50 wt % blend of raw corn straw (CS) and raw pinewood wastes in a fixed-bed reactor. This parameter was varied in the range of 0.079–0.226 kg m−2 s−1, which changed the overall combustion stoichiometry from air-lean (excess air coefficient λ = 0.73) to air-rich (excess air coefficient λ = 1.25) and affected the combustion efficiency and stability as well as the emissions of hazardous pollutants. It was observed that by increasing air, the ignition delay time first increased and then decreased, the average bed temperatures increased, both the average flame propagation rates and the fuel burning rates increased, and the combustion efficiencies also increased. The emissions of CO as well as those of cumulative gas phase nitrogen compounds increased, the latter mostly because of increasing HCN, while those of NO were rather constant. The emissions of HCl decreased but those of other chlorine-containing species increased. The effect of air on the conversion of sulfur to SO2 was minor. By considering all of the aforesaid factors, a mildly overall air-rich (fuel-lean) (λ = 1.04) operating condition can be suggested for corn-straw/pinewood burning fixed-bed grate-fired reactors.
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April 2019
Research-Article
Effects of Air Flowrate on the Combustion and Emissions of Blended Corn Straw and Pinewood Wastes
Xiaoxiao Meng,
Xiaoxiao Meng
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China;
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: mengxiaoxiaodream@gmail.com
Harbin Institute of Technology,
Harbin 150001, China;
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: mengxiaoxiaodream@gmail.com
Search for other works by this author on:
Wei Zhou,
Wei Zhou
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: zhouweidream@gmail.com
Harbin Institute of Technology,
Harbin 150001, China
e-mail: zhouweidream@gmail.com
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Emad Rokni,
Emad Rokni
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: rokni.e@husky.neu.edu
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: rokni.e@husky.neu.edu
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Rui Sun,
Rui Sun
Professor
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: sunsr@hit.edu.cn
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: sunsr@hit.edu.cn
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Yiannis A. Levendis
Yiannis A. Levendis
Mem. ASME
Department of Mechanical and Industrial
Engineering,
College of Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: y.levendis@neu.edu
Department of Mechanical and Industrial
Engineering,
College of Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: y.levendis@neu.edu
Search for other works by this author on:
Xiaoxiao Meng
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China;
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: mengxiaoxiaodream@gmail.com
Harbin Institute of Technology,
Harbin 150001, China;
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: mengxiaoxiaodream@gmail.com
Wei Zhou
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: zhouweidream@gmail.com
Harbin Institute of Technology,
Harbin 150001, China
e-mail: zhouweidream@gmail.com
Emad Rokni
Department of Mechanical and Industrial
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: rokni.e@husky.neu.edu
Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: rokni.e@husky.neu.edu
Honghua Zhao
Rui Sun
Professor
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: sunsr@hit.edu.cn
School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China
e-mail: sunsr@hit.edu.cn
Yiannis A. Levendis
Mem. ASME
Department of Mechanical and Industrial
Engineering,
College of Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: y.levendis@neu.edu
Department of Mechanical and Industrial
Engineering,
College of Engineering,
Northeastern University,
360 Huntington Avenue, 334 SN,
Boston, MA 02116
e-mail: y.levendis@neu.edu
1Corresponding authors.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 9, 2018; final manuscript received November 7, 2018; published online December 24, 2018. Assoc. Editor: Samer F. Ahmed.
J. Energy Resour. Technol. Apr 2019, 141(4): 042205 (9 pages)
Published Online: December 24, 2018
Article history
Received:
October 9, 2018
Revised:
November 7, 2018
Citation
Meng, X., Zhou, W., Rokni, E., Zhao, H., Sun, R., and Levendis, Y. A. (December 24, 2018). "Effects of Air Flowrate on the Combustion and Emissions of Blended Corn Straw and Pinewood Wastes." ASME. J. Energy Resour. Technol. April 2019; 141(4): 042205. https://doi.org/10.1115/1.4042005
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