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Experimental study and modeling analysis of sewage sludge smoldering combustion at different airflow rates

文献类型：期刊论文

作者Zhang, Wei1,2; Song, Qianshi2; Wang, Xiaohan1,2; Wang, Xiaowei3; Li, Haowen2; Yang, Zixin2
刊名WASTE MANAGEMENT
出版日期2023-08-01
卷号168页码:126-136
关键词Sewage sludge Forward smoldering combustion Smoldering propagation Activation energy asymptotic analysis
ISSN号0956-053X
DOI10.1016/j.wasman.2023.06.001
通讯作者Song, Qianshi(songqs@ms.giec.ac.cn) ; Wang, Xiaohan(wangxh@ms.giec.ac.cn)
英文摘要Sewage sludge is a major by-product of wastewater treatment, and its unfavorable properties are frequently a key restriction of disposal technologies, resulting in high costs and ineffective waste management. Smoldering combustion is a new technique for disposing of organic solid waste with high moisture content, which efficiently recovers energy with minimal igniting energy requirements. The objective of this study is to investigate the effects of airflow rate on sewage sludge (SS) smoldering combustion by combining experimental and modeling analyses. Results show that air channeling easily forms at the reactor's edge, intensifying the smoldering reaction and forming a concave smoldering front. The minimum airflow rate required for self-sustaining smoldering is 0.3 cm/s. As the airflow rate increases, convective heat transfer becomes dominant over conduction and radiation, resulting in a surge in smoldering temperature and velocity at 0.6 cm/s, followed by a linear increase. The maximum airflow rate at which the smoldering process can propagate stably during SS disposal is 8 cm/s. The expressions of the smoldering characteristics are obtained by using the activation energy asymptotic approach, and the calculated and experimental values show the same trend of variation, with good agreement at low airflow rate conditions. Sensitivity analysis shows that porosity & phi; is the most crucial parameter affecting smoldering temperature and velocity.
WOS关键词HIGH-MOISTURE CONTENT ; WASTE ; SCALE ; REMEDIATION ; DESTRUCTION ; PYROLYSIS
资助项目National Natural Sci- ence Foundation of China[52206285] ; China Postdoctoral Sci- ence Foundation[2022M723161]
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001016231500001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Sci- ence Foundation of China ; China Postdoctoral Sci- ence Foundation
源URL[http://ir.giec.ac.cn/handle/344007/39481]  
专题中国科学院广州能源研究所
通讯作者Song, Qianshi; Wang, Xiaohan
作者单位1.Univ Sci & Technol China, Sch Energy Sci & Engn, Jinzhai Rd, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Nengyuan Rd, Guangzhou 510640, Peoples R China
3.Guangdong Ocean Univ, Sch Mech & Power Engn, Haida Rd, Zhanjiang 524088, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Wei,Song, Qianshi,Wang, Xiaohan,et al. Experimental study and modeling analysis of sewage sludge smoldering combustion at different airflow rates[J]. WASTE MANAGEMENT,2023,168:126-136.
APA Zhang, Wei,Song, Qianshi,Wang, Xiaohan,Wang, Xiaowei,Li, Haowen,&Yang, Zixin.(2023).Experimental study and modeling analysis of sewage sludge smoldering combustion at different airflow rates.WASTE MANAGEMENT,168,126-136.
MLA Zhang, Wei,et al."Experimental study and modeling analysis of sewage sludge smoldering combustion at different airflow rates".WASTE MANAGEMENT 168(2023):126-136.

入库方式： OAI收割

来源：广州能源研究所

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