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Three-stage steady-state model for biomass gasification in a dual circulating fluidized-bed

机译：双循环流化床中生物质气化的三阶段稳态模型

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摘要

A three-stage steady state model (TSM) was developed for biomass steam gasification in a dual circulating fluidized-bed (DFB) to calculate the composition of producer gas, carbon conversion, heat recovery, cost efficiency, and heat demand needed for the endothermic gasification reactions. The model was divided into three stages including biomass pyrolysis, char-gas reactions, and gas-phase reaction. At each stage, an empirical equation was estimated from experimental data. It was assumed that both unconverted char and additional fuel were completely combusted at 950 ℃ in the combustor (riser) and the heat required for gasification reactions was provided by the bed material (silica sand). The model was validated with experimental data taken from the literature. The parametric study of the gasification temperature (T) and the steam to fuel ratio (γ) was then carried out to evaluate performance criteria of a 1.8 MW DFB gasifier using woodchips as a feedstock for the electric power generation. Effective operating conditions of the DFB gasifier were proposed by means of the contour of the solid circulation ratio, the heat recovery, the additional fuel ratio and the cost efficiency with respect to T and γ.
机译：建立了三阶段稳态模型（TSM），用于在双循环流化床（DFB）中对生物质蒸汽进行气化，以计算生产气体的组成，碳转化，热回收，成本效率和吸热所需的热量需求气化反应。该模型分为三个阶段，包括生物质热解，炭气反应和气相反应。在每个阶段，都会根据实验数据估算经验公式。假定未转化的焦炭和其他燃料都在燃烧器（提升管）中于950℃完全燃烧，并且气化反应所需的热量由床料（硅砂）提供。该模型已使用来自文献的实验数据进行了验证。然后，对气化温度（T）和蒸汽与燃料的比率（γ）进行了参数研究，以评估以木片为发电原料的1.8 MW DFB气化炉的性能标准。通过固体循环比，热量回收，附加燃料比以及相对于T和γ的成本效率等高线的轮廓，提出了DFB气化炉的有效运行条件。

著录项

  • 来源
    《Energy Conversion & Management》 |2012年第1期|p.100-112|共13页
  • 作者

    Thanh D.B. Nguyen; Son Ich Ngo; Young-Il Lim; Jeong Woo Lee; Uen-Do Lee; Byung-Ho Song;

  • 作者单位

    Lab. FACS, Department of Chemical Engineering, Hankyong National University, Anseong-si 456-749, Republic of Korea,School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, Viet Nam;

    Lab. FACS, Department of Chemical Engineering, Hankyong National University, Anseong-si 456-749, Republic of Korea;

    Lab. FACS, Department of Chemical Engineering, Hankyong National University, Anseong-si 456-749, Republic of Korea;

    High Temperature Processing R&D Department, Korea Institute of Industrial Technology (KITECH), Cheonan 331-825, Republic of Korea;

    High Temperature Processing R&D Department, Korea Institute of Industrial Technology (KITECH), Cheonan 331-825, Republic of Korea;

    Department of Chemical Engineering, Kunsan National University, Gunsan, Jeonbuk 573-701, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biomass; steam gasification; dual circulating fluidized-bed (DFB); three-stage model (TSM); woodchips; electric power generation;

    机译：生物质蒸汽气化双循环流化床（DFB）;三阶段模型（TSM）;木屑;发电;

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