Abstract:

Reburning of flue gas is an effective method for NO_x emission control in furnace during combustion of coal. The conventional reburning fuel，i.e.，natural gas and coal，was discussed with respect to their bottlenecks of reburning. Then the merit of waste tire as an alternative reburning fuel was analyzed and the state-of-the-art waste tire reburning was reviewed. The results showed that 86% original NO_x was reduced when waste tire combined with lignite ash was used as reburning fuel. NO_x reduction efficiency was as high as 88% when waste tire mixed with Fe₂O₃ was used for reburning，which was much higher than that of coal and natural gas. Waste tire has important engineering application advantage when it is used as reburning fuel，which is helpful for both its utilization as a new energy source and the reduction of NO_x pollutant emission.

摘要：

再燃脱硝技术是燃烧过程中控制燃煤锅炉氮氧化物排放的有效方法。首先分析讨论了常用再燃脱硝的燃料，即天然气和煤粉的局限性，然后详细地讨论了废轮胎作为再燃燃料的可行性和优点，并介绍了作者有关废轮胎再燃脱硝的研究结果。当废轮胎与电厂褐煤灰组成混合燃料用于再燃脱硝时，其脱硝效率可达到86%，当废轮胎与Fe₂O₃组成混合燃料用于再燃脱硝时，其脱硝效率可达到88%。废轮胎用于再燃脱硝，一方面有利于它的能源资源化处理，另一方面能够非常有效地减少燃煤NO_x的排放，具有重要的工程应用价值。