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首页> 外文期刊>Biomass Conversion and Biorefinery >Influence of mean gas residence time in the bubbling fluidised bed on the performance of a 100-kW dual fluidised bed steam gasifier
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Influence of mean gas residence time in the bubbling fluidised bed on the performance of a 100-kW dual fluidised bed steam gasifier

机译：鼓泡流化床中平均气体停留时间对100 kW双流化床蒸汽气化炉性能的影响

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In this study, the influence of mean gas residence time in the bubbling fluidised bed, τ_f, on the performance of a pilot scale 100 kWdual fluidised bed gasifier was experimentally investigated. In the experiments, inert greywacke river sand was used as the bed material, and wood pellets of radiata pine sawdust were used as the feedstock. The gasification temperature and the steam to biomass ratio were set at 730–750°C and 0.8 kg/kg_(dry), respectively. The τ_f was varied using three different bed material inventories in the gasification reactor of 5.8, 9.1 and 12.1 kg with the corresponding τ_f being calculated to be 0.16, 0.19 and 0.21 s, respectively. The results of this study show that the overall performance of the dual fluidised bed steam gasifier increased with τ_f. The key findings are: (1) the total tar concentration in the producer gas was reduced by 24% (except C3 tar) with the τ_f increasing from 0.16 to 0.21 s, thus the tar dew point decreased by 16°C, from 188°C to 172°C; (2) the carbon conversion rate and the cold gas efficiency increased by 8% and 3%, respectively, as the τ_f was increased in the above range and (3) the water–gas shift reaction appeared to play a more important role with the increase of τ_f
机译：在这项研究中，实验研究了鼓泡流化床中平均气体停留时间τ_f对中试规模100 kW双流化床气化炉性能的影响。在实验中，惰性的格雷瓦克河砂被用作床层材料，辐射松木屑的木屑被用作原料。气化温度和水蒸气与生物质之比分别设置为730–750°C和0.8 kg / kg_（干）。在气化反应器中使用三种不同的床料库存5.8、9.1和12.1 kg来改变τ_f，相应的τ_f分别计算为0.16、0.19和0.21 s。这项研究的结果表明，双流化床蒸汽气化炉的整体性能随τ_f的增加而提高。主要发现是：（1）随着τ_f从0.16 s增加到0.21 s，生产气中的总焦油浓度降低了24％（C3焦油除外），因此焦油露点从188°降低了16°C。 C至172°C; （2）随着τ_f在上述范围内的增加，碳的转化率和冷气效率分别提高了8％和3％;（3）水煤气变换反应似乎对τ_f起着更重要的作用。 τ_f的增加

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