Research on Numerical Simulation of High-Temperature Oxygen-Enriched Ignition
High-temperature air ignition technology in thermal power plants is a novel ignition method designed to replace traditional fuel oil ignition systems,reduce fuel oil consumption,and enhance economic efficiency and environmental performance. Oxygen-enriched combustion technology,meanwhile,offers advantages such as wide adaptability to different coal types,high combustion temperatures,and low ignition temperatures. Therefore,leveraging the advantages of both oxygen-enriched combustion and high-temperature air ignition technologies can efficiently utilize low-quality coal,eliminate the need for stabilizing oil,achieve efficient ignition,and maintain stable combustion at low loads,which is of significant research importance. This paper studies the ignition characteristics of a high-temperature air ignition burner under an oxygen-enriched atmosphere through numerical simulation. The analysis indicates that as the concentration of pulverized coal increases,the ignition distance of pulverized coal first decreases and then increases. As the primary air velocity decreases,the ignition distance of pulverized coal gradually shortens,but the rigidity of the coal powder airflow decreases,causing flame deviation. Increasing the temperature of high-temperature oxygen-enriched air can significantly shorten the ignition distance of pulverized coal.
万方数据
维普
