1045MW超超临界贫煤锅炉燃用高挥发分烟煤的燃烧调整研究及工程实践

Study of the Adjustment to the Combustion in a 1 045 MW Ultra-supercritical Boiler Burning Bituminous Coal With a High Volatile Content Instead of Lean Coal and Its Engineering Practice

针对某1 045 MW超超临界燃烧贫煤锅炉改烧高挥发份烟煤问题,进行锅炉(或燃烧器)冷态空气动力场试验,调整了燃烧器配风及煤粉细度,确定了燃煤掺配方案。并对改进后炉膛热态温度分布进行了监测,运行结果表明贫煤锅炉燃用高挥发分烟煤试验工作取得初步成功,截至目前燃烧器未见烧损迹象,锅炉无明显结焦,较好地保证了锅炉安全、经济和稳定运行,拓宽了锅炉及制粉系统对实际煤种的适用能力。

A cold-state aerodynamic field test of a 1045 MW ultra-supercritical boiler( or its burners) burning bituminous coal with a high volatile content instead of lean coal was conducted with the air distribution and pulverized coal fineness in the burners being adjusted and a version for diluting and mixing the coal burned being determined. At the same time,the hot-state temperature distribution in the furnace after the improvement was monitored. The operation results show that the test of the boiler burning bituminous coal with a high volatile content instead of lean coal has achieved a preliminary success. Up to date,there emerge no signs of any combustion-caused damage to the burners and also no obvious signs of coking in the boiler,thus ensuring relatively well the safe,economic and stable operation of the boiler and enhancing the adaptability of the boiler and its milling system to the actual coal ranks.