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Numerical investigation on co-firing with ammonia and pulverized coal in a 10MW_(th) combustion facility

机译：10MW_（TH）燃烧设施中氨与煤粉共同烧制的数值研究

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摘要

Ammonia (NH3) is a kind of carbon-free sustainable alternative fuel and has some merits compared with hydrogen. Recently, co-firing of NH3 with pulverized coal has attracted great attention. In this study, a combustion facility (10 MW_(th)) for pulverized coal was simulated with computational fluid dynamics (CFD) to evaluate the effects of NH3 co-firing on characteristics of combustion, heat transfer and NO_x emission. Both experiment and simulation results show that NH3 co-firing leads to a lower flame temperature, less heat absorbed by walls, more unburnt carbon loss. In addition, a lower NO_x emission in the conditions of NH3 co-firing was successfully achieved in experiment. However, in simulation, the opposite trend was obtained. Thus, it is necessary to improve the reaction rates expressions of NH3 combustion in the present NO_x model.
机译：氨（NH3）是一种无碳可持续替代燃料，与氢相比有一些优点。最近，NH3与粉煤的共同射击引起了极大的关注。在该研究中，用计算流体动力学（CFD）模拟用于粉煤的燃烧设施（10mW_（Th）），以评估NH3共射对燃烧，传热和NO_X排放特性的影响。实验和仿真结果表明，NH3共用导致较低的火焰温度，墙壁吸收的较少，更堵塞的碳损失。此外，在实验中成功地实现了NH3共烧条件下的较低的NO_X排放。然而，在模拟中，获得了相反的趋势。因此，有必要在本NO_X模型中改善NH3燃烧的反应速率表达。

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