提高超超临界压力机组蒸汽参数的可行性分析  

Analysis on Feasibility of Improving Steam Parameters of Ultra-supercritical Pressure Unit

作　　者：叶如祥 刘川槐 

机构地区：[1]淮浙煤电凤台发电厂,安徽淮南232131

出　　处：《广东电力》2013年第7期39-42,共4页Guangdong Electric Power

摘　　要：为提高机组的热效率,针对目前的常规设计参数,对提高660 MW超超临界压力机组蒸汽参数的可行性进行了分析。技术分析和经济指标计算结果表明,在不改变现有锅炉型式的情况下,通过增加锅炉一次系统部分受热面壁厚来提高主蒸汽压力,通过提高再热器系统部分受热面材料等级来提高再热蒸汽温度的方案是可行的,但设备初始投资成本较大,收回成本周期较长。For improving heat rate of the unit, this paper analyzes feasibility of steam parameters of 660 MW ultra-supercriti- cal pressure unit by aiming present conventional design parameters. Technological analysis and economic index calculation results show that under the condition of unchanging existing boiler types, it is able to improve main steam pressure by in- crease wall thickness of partial heating area of the primary system of boiler. In addition, it is feasible to improve reheat steam temperature by improving partial heating area materials of reheater system but it is possible to increase primary invest- ment cost of equipments and cost-recovering period.

关 键 词：超超临界压力机组 循环热效率 主蒸汽压力 再热蒸汽温度 热耗率 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]