Cold flow model of dual fluidized bed: A review
Cold flow model of dual fluidized bed: A review
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DOI：
10.1016/j.rser.2015.09.034
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发表时间：
2016
影响因子：
15.9
通讯作者：
Siddhartha Shrestha;B. S. Ali;M. D. Hamid
中科院分区：
文献类型：
--
作者：
Siddhartha Shrestha;B. S. Ali;M. D. Hamid
双流化床气化炉（DFBGs）气化已被证明是一种很有前途的技术。除气化外，双流化床（DFB）技术还用于CO2捕获-化学链燃烧（CLC）、钙链（CaL）和吸附增强重整（AER）。虽然有应用这些技术的试验工厂，但仍需改进才能在商业上可行。基本上，反应器的性能取决于反应器内的流体动力学。因此，冷态流动模型（CFMs）被广泛应用于研究过程的基本特性，如压力降、固相分数和循环速率，以改善操作和解决故障。本文概述了尺度关系的应用，以实现工业规模的工厂，实验室规模和双流化床（DFB）的CFMs之间的流体动力学相似。此外，通过回顾文献中已有的数据，对DFB冷态模型中发生的流化状态和稳定操作区域进行了探索。从现有的研究中获得的压力分布，固体分数分布和固体循环速率，并与影响其行为的参数的效果一起讨论。
Gasification in dual fluidized bed gasifier (DFBGs) has proven itself as a promising technology. Apart from gasification, dual fluidized bed (DFB) technology has also been utilized for CO2capture-chemical looping combustion (CLC), calcium looping (CaL) and adsorption enhanced reforming (AER). Although pilot plants applying these technologies are available, still need improvement to be commercially viable. Fundamentally, the performance of the reactor depends upon the fluid dynamics within the reactor. So cold flow models (CFMs) are widely used in order to study the process fundamentals such as: pressure drop, solid fraction and solid circulation rate, to improve the operation and tackle the problem by troubleshooting. This paper outlines the application of scaling relationships to realize the hydrodynamic similarity among the industrial scale plant, the laboratory scale and CFMs of dual fluidized bed (DFB). Moreover, the occurring fluidization regimes and the stable operating regions in the cold model of DFB have been explored by reviewing the existing data in the literature. The pressure profiles, solid fraction profiles and the solid circulation rate obtained from the existing studies are presented and discussed together with the effect of the parameters influencing their behavior.