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Performance of entrained flow and fluidised bed biomass gasiflers on different scales

机译：夹带流床和流化床生物质气化炉在不同规模下的性能

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摘要

This biomass gasification process study compares the energetic and economic efficiencies of a dual fluidised bed and an oxygen-blown entrained flow gasifier from 10 MW_(th) to 500 MW_(th) While fluidised bed gasification became the most applied technology for biomass in small and medium scale facilities, entrained flow gasification technology is still used exclusively for industrial scale coal gasification. Therefore, it is analysed whether and for which capacity the entrained flow technology is an energetically and economically efficient option for the thermo-chemical conversion of biomass. Special attention is given to the pre-conditioning methods for biomass to enable the application in an entrained flow gasifier. Process chains are selected for the two gasifier types and subsequently transformed to simulation models. The simulation results show that the performance of both gasifier types is similar for the production of a pressurised product gas (2.5 MPa). The cold gas efficiency of the fluidised bed is 76-79% and about 0.5-2 percentage points higher than for the entrained flow reactor. The net efficiencies of both technologies are similar and between 64% and 71% depending on scale. The auxiliary power consumption of the entrained flow reactor is caused mainly by the air separation unit, the oxygen compression, and the fuel pulverisation, whereas the fluidised bed requires additional power mainly for gas compression. The costs for the product gas are determined as between €4.2 cent/kWh (500 MW_(th)) and €7.4 cent/kWh (10 MW_(th)) in the economic analysis of both technologies. The study indicates that the entrained flow reactor is competitive technology for biomass gasification also on a smaller scale.
机译：这项生物质气化工艺研究比较了双流化床和吹氧气流床气化炉从10兆瓦（th）到500兆瓦（th）的能量和经济效率，而流化床气化已成为小型和小型生物质应用最广泛的技术。在中等规模的设施中，气流床气化技术仍仅用于工业规模的煤气化。因此，分析了对于生物质的热化学转化来说，夹带流动技术是否以及对于哪种容量是在能量和经济上有效的选择。特别注意生物质的预处理方法，以使其能够在气流床气化炉中应用。为这两种气化炉类型选择了工艺链，然后将其转化为模拟模型。模拟结果表明，两种类型的气化炉的性能在加压产品气（2.5 MPa）的生产中都相似。流化床的冷气效率为76-79％，比气流床反应器高约0.5-2个百分点。两种技术的净效率相近，取决于规模，介于64％和71％之间。夹带流反应器的辅助功率消耗主要由空气分离单元，氧气压缩和燃料粉化引起，而流化床则主要需要用于气体压缩的附加功率。在两种技术的经济分析中，产品气的成本确定在4.2欧分/ kWh（500 MW_th）至7.4欧分/ kWh（10 MW_th）之间。研究表明，气流床反应器在较小规模上也是生物质气化的竞争技术。

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  • 来源
    《Energy Conversion & Management》 |2013年第5期|95-106|共12页
  • 作者

    Alexander Tremel; Dominik Becherer; Sebastian Fendt; Matthias Gaderer; Hartmut Spliethoff;

  • 作者单位

    Institute for Energy Systems, Technische Universitaet Muenchen, Boltzmannstrasse 15, 85748 Garching, Germany;

    Institute for Energy Systems, Technische Universitaet Muenchen, Boltzmannstrasse 15, 85748 Garching, Germany;

    Institute for Energy Systems, Technische Universitaet Muenchen, Boltzmannstrasse 15, 85748 Garching, Germany;

    Institute for Energy Systems, Technische Universitaet Muenchen, Boltzmannstrasse 15, 85748 Garching, Germany;

    Institute for Energy Systems, Technische Universitaet Muenchen, Boltzmannstrasse 15, 85748 Garching, Germany;

  • 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

    gasification; biomass; entrained flow; fluidised bed; process simulation; cold gas efficiency;

    机译：气化;生物质夹带流量流化床过程模拟;冷气效率;

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