低NO_x燃烧技术研究现状及进展

Review on low NO_x combustion techniques

目前,已采用低NO_x燃烧技术的机组依然存在NO_x排放量过高、结渣、腐蚀等问题,难以满足新的NO_x排放标准。本文在分析我国低NO_x燃烧技术现状的基础上,结合低NO_x燃烧新技术的原理及发展状况,重点探讨了脉动燃烧、化学链燃烧、等离子体燃烧、O_2/CO_2燃烧、MILD燃烧等新型低NO_x燃烧技术的研究现状及进展情况,并对存在问题提出了相应的建议。认为,新型低NO_x燃烧技术能显著降低NO_x的排放量,但在实际工程中各有利弊。建议在加快新技术的研发和应用的同时,对多种低NO_x燃烧技术进行优化整合,使其达到新的NO_x排放标准。

Currently, several problems, such as over high NOx emission, slagging and corrosion, still occurred on units which have already applied the low NOx combustion technologies, thus the units are difficult to meet requirements of the new NOx emission standard. The current situation of low NOx combustion tech- nology in China is summarized in this paper. On this basis, the principle and development of the new tech- nology of low NOx combustion are studied. The theoretical research and experimental verification of the new low NOx combustion technology are investigated in detail, such as pulse combustion technology, chem- ical chain combustion technology, plasma combustion technology, Oz/COz combustion technology and MILD combustion technology. Moreover, several suggestions are put forward against the existing prob- lems. The experimental results show that the new low NOx combustion technology can significantly reduce the emissions of NOx. However, during the actual application, advantages and disadvantages both exist. It suggests that integration of multiple low NOx combustion technologies should be optimized while accelera- ting the development and application of these new technologies.