A novel cyclonic fluidized-bed combustor (ψ-FBC):: Combustion and thermal efficiency, temperature distributions, combustion intensity, and emission of pollutants

被引:32
作者
Madhiyanon, T. [1 ]
Lapirattanakun, A.
Sathitruangsak, P.
Soponronnarit, S.
机构
[1] Mahanakorn Univ Technol, Dept Engn Mech, Bangkok 10530, Thailand
[2] King Mongkuts Univ Technol, Sch Energy & Mat, Bangkok 10140, Thailand
关键词
combustor; cyclone; fluidized bed; gas emission; rice husk; swirl flow;
D O I
10.1016/j.combustflame.2006.03.008
中图分类号
O414.1 [热力学];
学科分类号
摘要
A novel cyclonic fluidized-bed combustor (psi-FBC) was developed and tested for burning rice husk. The purpose of the new design was to integrate cyclonic and fluidized-bed combustion into a unique combustor for more efficient combustion, while maintaining its compact nature. The performance of the psi-FBC, with a design capacity of 100 kW(th), was analyzed in terms of combustion and thermal efficiency, volumetric combustion intensity, and pollutant emissions. A combustion efficiency of 98% was easily obtained, and a maximum volumetric intensity up to 0.95 MW m(-3) was achieved. For all conditions, significant effects of primary, secondary, and tertiary air velocity on combustion efficiency were not observed; however, a too-high fluidizing air velocity decreased combustion efficiency. Nearly isothermal bed conditions could be established without using sand as bed material. Analysis of gas emissions within the combustor displayed a successful merging of the two distinct combustion technologies. Emissions of CO and NO, based on 6% (volume) O-2, were determined to be in the range 50-400 and 350-425 ppm, respectively. (c) 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码:232 / 245
页数:14
相关论文
共 23 条
  • [1] Co-combustion of coal and olive oil industry residues in fluidised bed
    Armesto, L
    Bahillo, A
    Cabanillas, A
    Veijonen, K
    Otero, J
    Plumed, A
    Salvador, L
    [J]. FUEL, 2003, 82 (08) : 993 - 1000
  • [2] Combustion behaviour of rice husk in a bubbling fluidised bed
    Armesto, L
    Bahillo, A
    Veijonen, K
    Cabanillas, A
    Otero, J
    [J]. BIOMASS & BIOENERGY, 2002, 23 (03) : 171 - 179
  • [3] BECKER FE, 1989, Patent No. 4881476
  • [4] Experimental study on rice husk combustion in a circulating fluidized bed
    Fang, M
    Yang, L
    Chen, G
    Shi, Z
    Luo, Z
    Cen, K
    [J]. FUEL PROCESSING TECHNOLOGY, 2004, 85 (11) : 1273 - 1282
  • [5] GAYAN P, FUEL, P277
  • [6] GUPTA AK, 1984, SWIRL FLOW, P300
  • [7] Evaluation of the combustion efficiency and emission of pollutants by coal particles in a vortexing fluidized bed
    Lin, CH
    Teng, JT
    Chyang, CS
    [J]. COMBUSTION AND FLAME, 1997, 110 (1-2) : 163 - 172
  • [8] Agglomeration in bio-fuel fired fluidized bed combustors
    Lin, WG
    Dam-Johansen, K
    Frandsen, F
    [J]. CHEMICAL ENGINEERING JOURNAL, 2003, 96 (1-3) : 171 - 185
  • [9] Overview of combustion and gasification of rice husk in fluidized bed reactors
    Natarajan, E
    Nordin, A
    Rao, AN
    [J]. BIOMASS & BIOENERGY, 1998, 14 (5-6) : 533 - 546
  • [10] PARTICLE FLOW PATTERN IN THE FREEBOARD OF A VORTEXING FLUIDIZED-BED
    NIEH, S
    YANG, G
    [J]. POWDER TECHNOLOGY, 1987, 50 (02) : 121 - 131