Three-dimensional CFD simulation of oxy-fuel combustion in a circulating fluidized bed with warm flue gas recycle
Three-dimensional CFD simulation of oxy-fuel combustion in a circulating fluidized bed with warm flue gas recycle
复制标题
温烟气循环循环流化床富氧燃烧三维CFD模拟
DOI：
10.1016/j.fuel.2017.12.042
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发表时间：
2018-03
期刊：
影响因子：
7.4
通讯作者：
Chen Xiaoping
中科院分区：
文献类型：
--
作者：
Wu Ying;Liu Daoyin;Duan Lunbo;Ma Jiliang;Xiong Jie;Chen Xiaoping
在各种CO2捕集方法中，富氧燃烧技术在以经济的方式捕集CO2方面表现出巨大的潜力。基于中试循环流化床燃烧器，采用计算流体力学（CFD）方法对热烟气再循环富氧循环流化床燃烧进行了数值模拟。在这项工作中，WFGR在富氧燃料循环流化床燃烧的欧拉-欧拉CFD模拟实现。详细的流体力学，温度，气体特性和污染物排放的剖面进行了分析，模拟结果与实验数据之间的良好的一致性。特别注意的是，在燃烧条件下的气体分布的比较与无WFGR，说明与WFGR的富氧燃料循环流化床燃烧在CO2捕获和污染物减少的独特优势。此外，本文还研究了不同氧浓度（21%~ 40%）的富氧气氛对循环流化床燃烧性能的影响，成功地预测了高氧浓度下WFGR的富氧燃烧，丰富了循环流化床燃烧研究的手段。
Among various CO2 capture methods, the oxy-fuel combustion technology exhibits great potential for CO2 capture in an economical way. Based on a pilot-scale circulating fluidized bed (CFB) combustor, computational fluid dynamics (CFD) is applied to simulate the oxy-fuel CFB combustion with warm flue gas recycle (WFGR). In this work, the WFGR in the oxy-fuel CFB combustion is realized by the Eulerian-Eulerian CFD simulation. Detailed profile of the hydrodynamics, temperature, gas characteristics and pollutant emission is analyzed with good agreement between the simulated result and the experimental data achieved. Special attention is paid to the comparison of gas distribution under the combustion conditions with and without WFGR, illustrating the unique advantages of the oxy-fuel CFB combustion with WFGR in the CO2 capture and pollutant reduction. Besides, influence of the oxy atmosphere with different O-2 concentrations (from 21% to 40%) on the overall performance is conducted, successfully predicting the oxy-fuel combustion with WFGR under a high O-2 concentration and enriching the investigation method of the CFB combustion study.
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