Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves

doi:10.1016/j.cjche.2022.12.012

中国化学工程学报 ›› 2023, Vol. 59 ›› Issue (7): 182-192.DOI: 10.1016/j.cjche.2022.12.012

• Full Length Article • 上一篇下一篇

Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves

Jian Han^1,2, Xinhua Liu¹, Shanwei Hu¹, Nan Zhang¹, Jingjing Wang^1,2, Bin Liang^1,2

1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2022-07-14 修回日期:2022-12-26 出版日期:2023-07-28 发布日期:2023-10-14
通讯作者: Xinhua Liu,E-mail:xhliu@ipe.ac.cn;Nan Zhang,E-mail:nzhang@ipe.ac.cn
基金资助:
We would like to thank financial supports from the “Transformational Technologies for Clean Energy and Demonstration”, Strategic Priority Research Program of Chinese Academy of Sciences (XDA21040400).

Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves

Jian Han^1,2, Xinhua Liu¹, Shanwei Hu¹, Nan Zhang¹, Jingjing Wang^1,2, Bin Liang^1,2

1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2022-07-14 Revised:2022-12-26 Online:2023-07-28 Published:2023-10-14
Contact: Xinhua Liu,E-mail:xhliu@ipe.ac.cn;Nan Zhang,E-mail:nzhang@ipe.ac.cn
Supported by:
We would like to thank financial supports from the “Transformational Technologies for Clean Energy and Demonstration”, Strategic Priority Research Program of Chinese Academy of Sciences (XDA21040400).

摘要/Abstract

摘要： Burning coal briquettes or biomass pellets in household decoupling stoves is of significance to the reduction of residential pollutant emissions such as NO and CO. In order to make full use of the superiority of decoupling combustion technology, the household stoves should be specially designed and optimized to adapt to fuel types and combustion characteristics. Using numerical simulation and experimental validation, this study quantitatively clarified that the reducibility of devolatilization char plays an important role in the suppression of NO emission in the decoupling combustion of coal, while the reducibility of pyrolysis gases has a dominant effect on the reduction of NO in the decoupling combustion of biomass. An optimal parameter combination of throat height and grate angle was obtained for the simultaneous suppression of NO and CO emissions in the household decoupling stove burning coal briquettes. Two types of decoupling stoves were developed to enable the clean combustion of biomass pellets. The A-type biomass stove with a multi-pass smoke tunnel shows a better comprehensive NO and CO reduction effectiveness than the B-type biomass stove consisting of a two-stage grate structure and an S-shaped pyrolysis chamber. The optimal structural parameters provided references for the design and manufacture of commercial decoupling coal and biomass stoves.

关键词: Decoupling combustion, Coal, Biomass, Numerical simulation, Nitrogen oxide, Carbon monoxide

Abstract: Burning coal briquettes or biomass pellets in household decoupling stoves is of significance to the reduction of residential pollutant emissions such as NO and CO. In order to make full use of the superiority of decoupling combustion technology, the household stoves should be specially designed and optimized to adapt to fuel types and combustion characteristics. Using numerical simulation and experimental validation, this study quantitatively clarified that the reducibility of devolatilization char plays an important role in the suppression of NO emission in the decoupling combustion of coal, while the reducibility of pyrolysis gases has a dominant effect on the reduction of NO in the decoupling combustion of biomass. An optimal parameter combination of throat height and grate angle was obtained for the simultaneous suppression of NO and CO emissions in the household decoupling stove burning coal briquettes. Two types of decoupling stoves were developed to enable the clean combustion of biomass pellets. The A-type biomass stove with a multi-pass smoke tunnel shows a better comprehensive NO and CO reduction effectiveness than the B-type biomass stove consisting of a two-stage grate structure and an S-shaped pyrolysis chamber. The optimal structural parameters provided references for the design and manufacture of commercial decoupling coal and biomass stoves.

Key words: Decoupling combustion, Coal, Biomass, Numerical simulation, Nitrogen oxide, Carbon monoxide

Jian Han, Xinhua Liu, Shanwei Hu, Nan Zhang, Jingjing Wang, Bin Liang. Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves[J]. 中国化学工程学报, 2023, 59(7): 182-192.

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Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves

Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves

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