Emission performance and combustion efficiency of a conical fluidized-bed combustor firing various biomass fuels.
This paper summarizes the results of an experimental study on combustion of three distinct biomass fuels (sawdust, rice husk and pre-dried sugar cane bagasse) in a single fluidized-bed combustor (FBC) with a conical bed using silica sand as the inert bed material. Temperature, CO, NO and O2 concentrations along the combustor height as well as in flue (stack) gas were measured in the experimental tests. The effects of fuel properties and operating conditions (load and excess air) on these variables were investigated. Both CO and NO axial profiles were found to have a maximum whose location divides conventionally the combustor volume into formation (lower) and reduction (upper) regions for these pollutants. Based on CO emission and unburned carbon content in fly ash, the combustion efficiency of the conical FBC was quantified for the selected biomass fuels fired under different operating conditions.
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Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand.
Kouprianov
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D000393:Air Pollutants / Q000032:analysis*; D002244:Carbon / Q000032:analysis; D002248:Carbon Monoxide; D002482:Cellulose / Q000737:chemistry*; D060729:Coal Ash; D017745:Incineration; D007700:Kinetics; D009569:Nitric Oxide; D012275:Oryza / Q000737:chemistry*; D010100:Oxygen; D052638:Particulate Matter; D019441:Plant Epidermis / Q000737:chemistry*; D013696:Temperature; D014934:Wood
D000393:Air Pollutants; D060729:Coal Ash; D052638:Particulate Matter; D009569:Nitric Oxide; D002244:Carbon; D002248:Carbon Monoxide; D002482:Cellulose; C027433:bagasse; D010100:Oxygen