Effect of air supply on combustion and emission characteristics of biodiesel in industrial furnace

IF 3.5 4区工程技术 Q3 ENERGY & FUELS

Biomass Conversion and Biorefinery Pub Date : 2024-09-09 DOI:10.1007/s13399-024-06089-w

Shang Jiang, Fashe Li, Shuang Wang, Xin Ma, Huicong Zhang

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Abstract

Biodiesel combustion in industrial furnaces, which functions as an effective alternative for fossil fuel combustion, is an important energy-saving and emission reduction technology. In this research, the effects of optimizing air conditions on combustion and emission characteristics of waste oil-biodiesel in an industrial furnace were studied through numerical simulation and experiment. The results showed that both the maximum temperature in the furnace and the export concentration of nitric oxide (NO) increased initially and then decreased gradually with an increase in the atomization air volume, and the excess air coefficient exhibits the same pattern of influence on the temperature and NO concentration. Increasing the atomization air volume to 30 L/min produced a lifted flame. A high temperature and low export concentration of NO were observed when the excess air coefficient and atomization air volume were 1.1 and 40 L/min, respectively. The export concentration of NO and maximum temperature were increased with a rise in the air preheating temperature and air oxygen content; however, the growth trend gradually slowed down. The export concentration of NO was increased by more than 30 times, while the air oxygen content rose from 21 to 33%. Meanwhile, the export volume of fuel gas was reduced by 34.3%, which enhanced the heat efficiency of the furnace.

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供气对工业炉中生物柴油燃烧和排放特性的影响

在工业炉中燃烧生物柴油可有效替代化石燃料燃烧，是一项重要的节能减排技术。本研究通过数值模拟和实验研究了优化空气条件对工业炉中废油生物柴油燃烧和排放特性的影响。结果表明，随着雾化空气量的增加，炉内最高温度和一氧化氮（NO）的出口浓度均先升高后逐渐降低，过量空气系数对温度和 NO 浓度的影响规律相同。将雾化空气量增加到 30 升/分钟后，火焰升高。当过量空气系数和雾化空气量分别为 1.1 和 40 升/分钟时，温度较高，NO 出口浓度较低。随着空气预热温度和空气含氧量的升高，NO 出口浓度和最高温度也随之升高，但增长趋势逐渐放缓。NO 的出口浓度增加了 30 多倍，而空气含氧量则从 21% 上升到 33%。同时，燃料气出口量减少了 34.3%，提高了炉子的热效率。

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来源期刊

Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment

CiteScore

7.00

自引率

15.00%

发文量

1358

期刊介绍： Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.