1000MW超超临界机组降压法蒸汽吹管  

Intermittent pressure steam purging for 1 000 MW ultra-supercritical units

作　　者：胡志宏[1] 郝卫东[1] 孙伟 梁茂春[3] 杨金发[3] 

机构地区：[1]山东电力研究院,山东济南250002 [2]东北电力科学研究院,辽宁沈阳110006 [3]邹县发电厂,山东邹城273522

出　　处：《华东电力》2008年第6期79-82,共4页East China Electric Power

摘　　要：介绍邹县电厂四期工程2×1 000 MW超超临界锅炉在采用或不采用炉水循环泵时不熄火降压吹管的情况。吹管时发现无炉水循环泵时锅炉上部水冷壁存在短时干烧现象,此时应减少燃料量;在有炉水循环泵时增加给水流量达到吹管蒸发量后干烧现象消失。不熄火降压吹管时锅炉水冷壁水动力工况稳定,受热面管壁不超温,其成功经验可为类似锅炉吹管提供参考。The details on the intermittent pressure cycle purging for 2 × 1 000 MW ultra-supercritical units with or without the boiler circulating pump in the fourth-stage project of Zouxian Power Plant are presented. It was observed that the upper water-wall dried out when the purge control valve was open for a boiler without the circulating pump, and such phenomenon disappeared when the feed-water flow rate equaled to the purging steam flow rate with help of the circulating pump. The fuel should also be reduced to the lowest degree as dry-out occurred. The practice shows that the hydrodynamic performance in the water-wall is stable and the tube wall temperature of the heating surface is normal during intermittent pressure cycle purging with flame.

关 键 词：超超临界 炉水循环泵 直流锅炉 蒸汽吹管 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]