印尼煤掺烧方式对锅炉运行性能的影响

摘要

Under low NOx combustion condition,experimental research on influence of Indonesia coal blending combustion mode on operating performance of boiler was developed for one 700 MW tangentially fired boiler. Three blending combus-tion modes of combining Indonesia coal and mixed coal were designed and temperature of metal wall,efficiency of the boiler and NOx emission load was tested with different combustion modes so as to obtain optimized combustion mode for Indonesia coal. Comparison results indicate that compared with other blending combustion modes,temperature of the metal walls,e-mission loads of CO and NOx ,exhaust gas temperature and carbon contents of fly ashes of the superheater and the reheater are the lowest and efficiency of the boiler is the highest by using the mode of Indonesia coal blending combustion in the lower burner which may be in favor of improving security,economy and environment protection performance of the boiler.%在低氮燃烧条件下对一台700 MW四角切圆锅炉开展了印尼煤掺烧方式对锅炉运行性能影响的试验研究。设计了3种印尼煤与神混煤掺烧方式，测试不同掺烧方式下的金属壁面温度、锅炉效率和 NOx 排放量，以获得优化的印尼煤掺烧方式。对比结果表明，相比于其他掺烧方式，采用下层燃烧器掺烧印尼煤的方式，过热器和再热器的金属壁面温度、CO和NOx 排放量、排烟温度、飞灰含碳量均最低，锅炉效率最高，有利于提高锅炉运行安全性、经济性和环保性能。