Carrying Capacity and Gas Flow Path Mechanism of a Novel Multistage Air Reactor for Chemical Looping Combustion,Energy & Fuels

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Carrying Capacity and Gas Flow Path Mechanism of a Novel Multistage Air Reactor for Chemical Looping Combustion
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-11-13 00:00:00 , DOI: 10.1021/acs.energyfuels.8b02407
Yali Shao ₁ , Xiaojia Wang ₁ , Baosheng Jin ₁ , Yong Zhang ₁ , Zhiwei Kong ₁ , Xudong Wang ₁ , Zhaoyang Jin ₁

Affiliation

To overcome the disadvantages of the previous air reactor in our in situ gasification chemical looping combustion (iG-CLC) system, a novel multistage tower-type air reactor was first proposed in this work. It was mainly comprised of a tower-type moving bed, three gas distributors, and three gas dischargers. Feasibility of the multistage design and gas flow paths was investigated in detail in the experimental system of the air reactor. The results show that, in comparison to the previous single-stage air reactor, the carrying capacity of the gas flow was obviously enhanced by the multistage design. Under the involved single-inlet operating conditions, the gas leakage proportion increased with an increase in the inlet gas flow rate, which could be caused by the tower-type structure or increasing penetration power of the gas. The gas bypassing from the first and third stages to the second stage could be effectively minimized by increasing the second-stage outlet pressure, while the gas leakage from the second stage to the third stage could be controlled by regulating the third-stage outlet pressure. The gas leakage proportions between different stages under the multi-inlet conditions were smaller than those under the single-inlet conditions. Under the involved multi-inlet condition, increasing the inlet gas flow rate at one stage could not only influence the gas distribution at this stage but also affect the gas flow paths at the other two stages. Further, to minimize the gas leakage between different stages and enable favorable operation conditions, it could be effective to first regulate the third-stage outlet pressure and then adjust the second-stage outlet pressure.

中文翻译：

新型化学循环燃烧多级空气反应器的承载能力及气流路径机理

为了克服现有原位空气反应器的缺点气化化学循环燃烧（iG-CLC）系统是一种新颖的多级塔式空气反应器。它主要由塔式移动床，三个气体分配器和三个气体排放器组成。在空气反应器的实验系统中详细研究了多级设计和气体流动路径的可行性。结果表明，与以前的单级空气反应器相比，多级设计明显提高了气流的承载能力。在所涉及的单入口运行条件下，气体泄漏比例随入口气体流量的增加而增加，这可能是由于塔型结构或气体渗透能力增加所致。通过增加第二级出口压力可以有效地最小化从第一级和第三级旁路到第二级的气体，而可以通过调节第三级出口压力来控制从第二级到第三级的气体泄漏。在多入口条件下，不同阶段之间的气体泄漏比例要小于在单入口条件下的泄漏比例。在所涉及的多入口条件下，增加一个阶段的进气流量不仅会影响该阶段的气体分布，还会影响其他两个阶段的气体流动路径。此外，为了最大程度地减少不同级之间的气体泄漏并实现良好的运行条件，

更新日期：2018-11-13

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