Nitrogen oxide (NO_x) emission from cement industry has caused severe atmospheric pollution for low denitration efficiency of existing denitration technologies. To tackle down this problem, an innovative NO_x reduction method exhibiting a higher denitration efficiency was developed in this study to satisfy the requirement of cleaner production. Besides, its specific mechanism was clarified in a bench scale experimental setup while its commercial viability was verified in a demonstration project. In accordance with the method, the pulverized coal was first pretreated in a specially designed pretreater where partial fuel nitrogen was in-situ reduced to N₂. Subsequently, products of pretreatment that exhibited higher chemical activity were injected to the precalciner to further reduce formed NO_x in the kiln gas. As revealed from the results, the denitration efficiency of the novel method can reach to 60%∼80%. Besides, it is promising in industrial application for the easy on-site implementation, high denitration efficiency and incomparable cost advantage. Under the premise of NO_x that dropped largely, the costs of initial investment and operation were overly small. It is therefore revealed that the proposed approach outperforms many of the existing denitration technologies in technological and environmental indicators, as well as from the economical perspective.

水泥行业排放的氮氧化物（NO _x）已导致严重的大气污染，导致现有脱硝技术的脱硝效率低下。为了解决向下此问题，一种创新的NO _X还原的方法表现出较高的脱硝效率在本研究中开发用于满足清洁生产的要求。此外，在实验规模的实验装置中阐明了其具体机理，并在一个示范项目中验证了其商业可行性。根据该方法，首先在专门设计的预处理器中对煤粉进行预处理，在该预处理器中将部分燃料氮原位还原为N ₂。随后，表现出更高的化学活性的预处理产物注入到分解炉，以进一步减少形成NO _X的窑气英寸 结果表明，该新方法的脱硝效率可达到60％〜80％。此外，现场易于实施，脱硝效率高，成本优势无可比拟，在工业应用中具有广阔的前景。在任何的前提下，_X是下降在很大程度上，初投资和运行成本都过于小。因此，从技术和环境指标以及从经济角度来看，所建议的方法都优于许多现有的脱硝技术。