可调煤粉浓度燃烧技术在670t/h贫煤锅炉上的应用

Application of Controllable Pulverized Coal Rich/Lean Combustion Technology at the 670t/h Lean Coal Boiler

河南省鹤壁万和发电有限责任公司２ 号炉是配２００ＭＷ 机组的６７０ｔ／ｈ 燃煤粉四角切圆燃烧锅炉，１９９８ 年３ 月应用浙江大学热能工程研究所开发的双稳可调浓淡煤粉燃烧器对原第二、第三层直流燃烧器进行改造。改造后连续运行至今的实践表明：在４５％ ～５０％ 负荷下调峰，可不投助燃油稳定燃烧。在同样工况下，改后的飞灰可燃物含量在高负荷（２００ＭＷ）和低负荷（１００ＭＷ）时分别从１．８３％ 和１．３２％ 下降到１．１２％和１．１７％ 。取得良好节油经济效益。图６ 表９

The No.2 (670t/h,200MW) at Hebi Wanhe Power Generation Co. Ltd., was put into use in 1992. This is a coal fired boiler with tangential fired method. The design coal is Hebi lean coal. To stabilize the combustion without oil at low load, eight original designed burners placed to No.2 and 3 level on the No.2 boiler were replaced with the controllable pulverized rich/lean ones developed by the Institute of Thermal Power Engineering (ITPE) of Zhejiang University. The practice of successive operation shows that stable combustion can be achieved at 50% load without support oil, even at 45% load. The combustible matter in fly ash decreased to 1.12% and 1.17% from 1.83% and 1.32%, respectively at full load(200MW) and half load (100MW). The application has obvious economic benafits. Figs 6, tables 9 and refs 4.