1000MW超超临界汽轮机高效10级回热技术应用实践

The Application of Ten-Stage Regenerative High-efficiency Technology in a 1000MW Ultra-supercritical Thermal Power Plant

回热系统既是汽轮机热力系统的基础,也是电厂热力系统的核心,它对机组和电厂的热经济性起着决定性的作用。我国1000MW级超超临界机组的热力系统普遍采用9级回热系统,即3级高加+5级低加+1级除氧器,新建机组较多增设了前置蒸发冷却器。国华九江电厂在国内百万等级一次再热超超临界机组中首次成功应用高效10级抽汽回热技术。

As a fundamental component in a turbine thermal system,regenerative system plays a key role in thermal power plants and conducts significant influence on the performance of thermal units and plants.In China,9-stage regenerative system,which consists of 3 high-pressure feedwater heaters,5 low-pressure feedwater heaters and a deaerator,is commonly applied in 1000MW ultra supercritical thermal power plants.Additionally,a front steam cooler is often added in newly constructed plants.Against this background,the 10-stage regenerative high-efficiency technology is firstly and successfully adopted in Guohua Jiujiang Plant,which will certainly provide valuable application experience for the further use of the technology.