锅炉技术2026，Vol.57Issue(3)：71-76,6.
褐煤锅炉中速磨煤机直吹式系统的二介质干燥方案及实现
The Two-Medium Drying Scheme and Implementation of the Medium-Speed Mill Direct-Fired System in Lignite Boilers
张跃 1薛宁 2包银泉 1徐立东 1王鸿印 1许东升 1孙东伟 1斯琴巴图 1王琼 1韩键平2
作者信息
- 1. 内蒙古能源发电科右中发电有限公司,内蒙古兴安盟 013550
- 2. 西安热工研究院有限公司,陕西西安 710032
- 折叠
摘要
Abstract
The issue of drying capacity in medium-speed mill direct-fired pulverizing systems for lignite-fired boilers has long been a challenge for the power industry.A two-medium drying scheme using high-temperature flue gas combined with high-temperature hot air is proposed,and its engineering implementation has successfully resolved the problems of excessively high primary air flow and insufficient drying capacity when grinding high-moisture lignite in medium-speed mill direct-fired systems.Practical application in a 660 MW unit demonstrates that under various load conditions,this system thoroughly addresses the issues of low hot primary air temperature and insufficient mill drying capacity in lignite-fired boilers,raising the mill outlet temperature by 5-10 ℃.Moreover,the reduction in primary air flow and the introduction of flue gas into the primary air significantly lower NOx generation in the furnace,reduce the operating cost of the boiler SCR system,alleviate air preheater blockage caused by high ammonia slip,and decrease the induced draft fan current.The reduction in both primary air fan current and induced draft fan current also contributes to a lower auxiliary power consumption rate.关键词
褐煤锅炉/中速磨煤机/二介质干燥/炉烟风机/防磨技术/NOx/厂用电率Key words
lignite-fired boiler/medium-speed mill/two-medium drying/flue gas fan/anti-wear technology/NOx/auxiliary power consumption rate分类
能源科技引用本文复制引用
张跃,薛宁,包银泉,徐立东,王鸿印,许东升,孙东伟,斯琴巴图,王琼,韩键平..褐煤锅炉中速磨煤机直吹式系统的二介质干燥方案及实现[J].锅炉技术,2026,57(3):71-76,6.
