title: Experimental study on rice husk combustion in a vortexing fluidized-bed with flue gas recirculation (FGR).
abstract: Vortexing fluidized-bed combustor (VFBC) has been proven to be an effective equipment in converting biomass wastes into clean energy. This study conducted experiments on rice husk combustion in a VFBC with FGR. The effect of FGR on combustion characteristics is investigated. In addition, the effect of operating variables such as excess oxygen ratio, and in-bed stoichiometric oxygen ratio on the temperature distributions, pollutants emissions, and combustion efficiency are also studied. The results show that the combustion efficiency of rice husk can reach 99% at optimal operation condition. CO emission increases with the in-bed stoichiometric oxygen ratio, but decreases with excess oxygen ratio. NOx emissions show inverse trend, and it can be effectively reduced by using FGR in the VFBC.
authors.affiliation: School of Metallurgy and Resource, Anhui University of Technology, Maanshan 243002 Anhui Province, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Duan
authors.forename: Chien-Song
authors.initials: CS
authors.lastname: Chyang
authors.forename: Chien-Wei
authors.initials: CW
authors.lastname: Lin
authors.forename: Jim
authors.initials: J
authors.lastname: Tso
mesh_terms: D000393:Air Pollutants; D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D002245:Carbon Dioxide / Q000032:analysis; D005740:Gases / Q000737:chemistry*; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D012275:Oryza / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis; D013696:Temperature; D014866:Waste Products / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D005740:Gases; D009566:Nitrates; D009573:Nitrites; D014866:Waste Products; D002245:Carbon Dioxide; D010100:Oxygen