CO-COMBUSTION OF RICE HUSK AND SINAI COAL IN CIRCULATING FLUIDIZED BED | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 10, Volume 39, No 4, July and August 2011, Page 839-852 PDF (173.91 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2011.127721 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Hamada M. Abdelmotalib; Mahmoud A. M. Youssef; Ibrahium M El-Mogazy | ||||
| Department of Mechanical Power Engineering and Energy, Faculty of Engineering, Minia University, Egypt | ||||
| Abstract | ||||
| Rice husk is one of the most important agricultural residues in Egypt. The present study introduces an experimental investigation on circulating fluidized bed (CFB) combustion of rice husk and co-combustion of rice husk and Egyptian (Sinai) coal. The test rig is a pilot scale CFB combustor of 145 mm inner diameter, 2 m tall and 100 kW thermal capacity. The influences of excess air, and coal share were studied. Temperature and heat flux along the reactor height, in addition to the concentrations of CO, NOx and SO2 in the flue gas out from cyclone were measured. The combustion efficiency was estimated based on CO and unburned char in flue gas. The highest efficiency recorded for rice husk combustion was 98% at excess air ratio (EA) = 1.1 and secondary air ratio (SAR) = 50%. Co-combustion of Sinai coal and rice husk reduced CO but increased SO2 and NOx emissions. The results suggest that rice husk is potential fuel that can be utilized for efficient and renewable energy production by using CFB combustion system especially at co-combustion with coal. | ||||
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