Exergy analysis of biomass fast pyrolysis in dual fluidized bed based on process simulation

doi:10.16085/j.issn.1000-6613.2016.03.012

Abstract

Abstract: Fast pyrolysis of biomass in a dual fluidized was simulated using Aspen Plus software,and the process included the following unit operations:drying,pyrolysis,bio-oil condensation,and combustion . Based on the simulation results,exergetic analysis of the whole process was performed in order to optimize the overall exergetic efficiency. Analysis results indicated that the exergetic efficiency increased only slightly with a decrement of system pressure drop while increased significantly from 69% to 75.6% when the pyrolysis char combusted was reduced from 100% to 65%. The conclusions are useful for industrial design of biomass fast pyrolysis.

Key words: biomass, pyrolysis, Aspen Plus, exergy

摘要： 用Aspen Plus 软件模拟了生物质双流化床快速热解生产流程,对流程的干燥、热解、冷凝、燃烧等过程进行了?分析,找出?利用率较低的可能影响因素,并对其改善。结果表明:流程压降对热解过程?利用率影响较小;副产物焦炭完全用作燃烧供热时,整个流程热流?损失较大,65%的焦炭用作燃烧供热时,?利用率由 69%提高到75.6%,模拟结果为生物质热解工业化放大过程能耗优化设计提供了参考依据。

关键词: 生物质, 快速热解, Aspen Plus, ?

CLC Number:

LÜ Qizheng, XU Qixiang, ZHANG Changsen, ZHANG Ruiqin. Exergy analysis of biomass fast pyrolysis in dual fluidized bed based on process simulation[J]. Chemical Industry and Engineering Progree, 2016, 35(03): 727-732.

吕奇铮, 徐起翔, 张长森, 张瑞芹. 基于生物质双流化床快速热解生产流程模拟的分析[J]. 化工进展, 2016, 35(03): 727-732.

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