Combustion Characteristics and Slagging during Co-Combustion of Rice Husk and Sewage Sludge Blends

Hao Rong, Teng Wang, Min Zhou, Hao Wang, Haobo Hou and Yongjie Xue
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Hao Rong: School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
Teng Wang: School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
Min Zhou: School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
Hao Wang: Department of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
Haobo Hou: School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
Yongjie Xue: State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Energies, 2017, vol. 10, issue 4, 1-13

Abstract: In this work, the thermal behavior of rice husk, sewage sludge, and their blends during combustion processes was investigated by means of thermogravimetric analysis (TGA), and the slagging characteristics were studied through X-ray fluorescence (XRF) and melting temperature. The effects of the proportion of rice husk and sewage sludge blends on the combustion process, ignition and burnout characteristics were also studied. The blends had rice husk percentages of 30, 50, 70 and 100%. The results indicate that there are four main stages of the material burning processes: dehydration, volatile oxidation, and decomposition/oxidation. The reactivity of the blends improved with increasing amounts of rice husk and the results suggest synergistic interactions between rice husk and sewage sludge during the co-combustion process. All co-combustion ashes showed a lower slagging potential owing to their high amorphous SiO 2 content. On the basis of combustion properties and slagging characteristics of ash, the ratio of sewage sludge in the blends should not exceed 30%.

Keywords: rice husk; sewage sludge; co-combustion; thermogravimetric analysis (TGA); slagging (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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