汽轮发电机组分轴高低位布置二次再热超超临界技术

Double Reheat Ultra-Supercritical Technology with Cross-Compound,High and Low Positioned Steam Turbounit

在严重雾霾要求改善大气环境和气候变化要求减排CO2的双重压力下,我国燃煤火电的发展面临着巨大的挑战。为适应我国能源革命对燃煤火电的要求,燃煤火电必采用更大容量、更高参数、更高效率、更低煤耗、更低排放和更加智能化的技术路线。面对挑战,超超临界技术从600℃等级向700℃,从一次再热向二次再热发展是必然的趋势。分析了现行的常规设计1 000MW二次再热超超临界技术的现状及其存在的问题和解决方案,重点介绍了1 350MW二次再热超超临界机组汽轮发电机组高低位分轴布置方案,并比较了该方案与现行的常规设计1 000MW二次再热超超临界机组的性能。

The development of Chinas coal-fired power generation is facing great challenges for CO2 emission reduction under the double pressure of both serious smog and climate change.The roadmap and technologies of coalfired power generation were studied to meet the increasingly strict requirements for greater capacity,higher steam parameters,higher efficiency,lower coal consumption,lower emission and more intelligent.It is inevitable for ultra-supercritical(USC)technology to develop from 600℃to 700℃level and from single reheat to double reheat.The status,problems and solutions were discussed for conventional 1 000 MW double reheat USC technology.Specific emphasis was put on 1 350 MW double reheat USC with the Cross-compound,High and Low Positioned steam turbine unit.The performance of this solution was compared with that of 1 000 MW double reheat USC.