1000MW超临界燃煤机组蒸汽管道性能优化研究  

Performance Optimization Research for Steam Pipeline of 1 000MW Supercritical Coal-Fired Unit

作　　者：胡玥[1] 杨志平[1] 杨勇平[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《汽轮机技术》2013年第5期368-372,共5页Turbine Technology

基　　金：国家科技支撑计划项目(项目号2011BAA04B03);国家自然科学基金联合基金项目(项目号:U1261210)

摘　　要：随着节能减排理念越来越受到人们的重视以及电厂主辅设备节能工作的深入进行,管道系统的节能降耗势在必行。基于某1 000MW超临界燃煤机组的实际设计数据:(1)对单个弯头进行了减阻分析;(2)采用弯管替代弯头、增加管径的方法对主蒸汽、再热蒸汽冷段、热段管道系统进行了减阻优化;(3)在考虑管材价格及煤价下,对减阻措施进行经济性核算,讨论其可行性。结果显示,将三大蒸汽管道所有弯头替换为3*ID弯管,并增加再热蒸汽冷段管径70mm可使机组热耗下降4.605kJ/(kW·h),煤耗下降0.170g/(kW·h),在年利用小时数5 294h下,每年节煤903t,节能效果显著。With energy saving idea attracting more and more attention and energy saving work of the main and auxiliary equipments of the power plant developing futher, the energy saving and consumption reduction of piping systems is imperative. Based on the actual design data of a 1000MW supercritical coal - fired unit, this article conducts research on the following three aspects ： （ 1 ） analyse the pressure-drop reduction measure of single elbow; （ 2 ） optimize the main steam, reheat cold and hot steam pipelines to reduce the pressure drop by replacing elbows with pipe bends and increasing pipe diameters ; （3） discuss its economic feasibility with considering the effect of pipe price and coal price on pressure - drop reduction. The calculation results show that by replacing all elbows of three steam piping systems with 3 ＊ ID pipe bends and increasing reheat cold steam pipe diameter 70mm, it decreases the unit heat consumption by 4.605 kJ/（ kW · h）, decreases the coal consumption by 0. 170g/（ kW · h）. Assuming the annual utilization hours is 5 29gh, it can save coal 903t/a. The energy-saving effect is observably.

关 键 词：管道系统 弯头 减阻优化 经济性分析 

分 类 号：TK264.9[动力工程及工程热物理—动力机械及工程]