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Bioresour Technol. 2014 Feb;154:201-8. doi: 10.1016/j.biortech.2013.11.093. Epub 2013 Dec 16.

Effect of secondary gas injection on the peanut shell combustion and its pollutant emissions in a vortexing fluidized bed combustor.

Author information

1
School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, PR China.
2
Department of Chemical Engineering, Chung Yuan Christian University, Chungli 32023, Taiwan, ROC. Electronic address: cschyang@cycu.edu.tw.
3
Department of Chemical Engineering, Chung Yuan Christian University, Chungli 32023, Taiwan, ROC.
4
R&D Center for Environmental Technology, Chung Yuan Christian University, Chungli 32023, Taiwan, ROC.

Abstract

Peanut shell is a common agricultural waste in Asia, and its high calorific value is suitable to be used as a fuel. In this study, a vortexing fluidized bed combustor (VFBC) with silica sand as the bed material was used for peanut shell combustion. There was no indication of bed agglomeration during combustions for as long as 12h. The temperatures and gas concentrations were measured along the axial direction at various operating conditions, including excess oxygen ratio and secondary gas flow rate. Results show that CO emission decreases with rising excess oxygen ratio and secondary gas flow rate, while NOx emissions show a reverse trend. To meet the minimum CO and NOx emission standards of Taiwan EPA, excess oxygen ratio ranging from 40% to 55% and secondary gas flow rate ranging from 1.56 to 2 Nm(3)/min are found optimal for crushed peanut shell combustion in a VFBC.

KEYWORDS:

Combustion; Peanut shell; VFBC; Vortexing effect

PMID:
24393745
DOI:
10.1016/j.biortech.2013.11.093
[Indexed for MEDLINE]
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