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Energies 2017, 10(4), 438; doi:10.3390/en10040438

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

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1,2,* and 3,*
1
School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
2
Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430079, China
3
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
4
Department of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Mejdi Jeguirim
Received: 10 February 2017 / Revised: 21 March 2017 / Accepted: 21 March 2017 / Published: 30 March 2017
View Full-Text   |   Download PDF [4494 KB, uploaded 30 March 2017]   |  

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 SiO2 content. On the basis of combustion properties and slagging characteristics of ash, the ratio of sewage sludge in the blends should not exceed 30%. View Full-Text
Keywords: rice husk; sewage sludge; co-combustion; thermogravimetric analysis (TGA); slagging rice husk; sewage sludge; co-combustion; thermogravimetric analysis (TGA); slagging
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rong, H.; Wang, T.; Zhou, M.; Wang, H.; Hou, H.; Xue, Y. Combustion Characteristics and Slagging during Co-Combustion of Rice Husk and Sewage Sludge Blends. Energies 2017, 10, 438.

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