摘要
[目的]为了推动采用再热温度630℃的1 000 MW新一代超超临界二次再热机组发展,需对某沿海电厂2×1 000 MW新一代超超临界二次再热机组的可行性进行研究。[方法]文章分析了主机参数、主机技术条件、主机设备可行性、辅机设备可行性、主要系统配置、机组经济性和热经济性指标。[结果]研究表明:1 000 MW新一代超超临界二次再热机组是可行的,已具备示范应用条件。与1 000 MW常规超超临界二次再热机组相比,1 000 MW新一代超超临界二次再热机组热效率更高,污染物排放更少,经济效益较高。该1 000 MW新一代超超临界二次再热机组热效率达到48.72%,发电标煤耗达到252.48 g/kWh,供电标煤耗达到260.16 g/kWh,为国内最优水平。[结论]我国具有自主知识产权的先进马氏体耐热钢G115和带小发电机的抽背式给水泵汽轮机可以应用于新一代超超临界二次再热机组。
[Introduction] The feasibility study of a 2 × 1 000 MW new generation ultra-supercritical unit with double re-heating cycles in a power plant in coastal areas is completed to promote the development of 1 000 MW new generation ultra-supercritical unit with double re-heating cycles at 630 ℃. [Method] The aspects of the main equipment parameters,specifications for main equipment,feasibility for main equipment,feasibility for auxiliary equipment,main system configuration,unit economy and thermal economy were analysized. [Result] The results showthat 1 000 MW new generation ultra-supercritical unit with double re-heating cycles is feasible,which can be applied in our country. Compared with 1 000 MW ultra-supercritical unit with double re-heating cycles,1 000 MW new generation ultra-supercritical unit with double re-heating cycles has a higher thermal efficiency,a lesser pollutant emissions,and a better economic profit. The 1 000 MW new generation ultra-supercritical unit with double re-heating cycles has a48. 72% thermal efficiency,a 252. 48 g/kWh gross coal consumption rate and a 260. 16 g/kWh net coal consumption rate,and is best in China. [Conclusion]Advanced martensitic heat-resistant steel G115 with independent intellectual property rights in China and extraction back pressure feed water pump steam turbine with a small generator can be used in 1 000 MW new generation ultra-supercritical unit with double re-heating cycles.
作者
王东雷
张鹏
霍沛强
WANG Donglei;ZHANG Peng;HUO Peiqiang(China Energy Engineering Group Guangdong Electric Power Design Institute Co.Ltd.,Guangzhou 510663,China)
出处
《南方能源建设》
2018年第3期33-41,共9页
Southern Energy Construction
基金
中国能建广东院科技项目"更高参数
二次再热超超临界机组双机回热带小发电机发电技术"(EV04031W)
关键词
新一代超超临界二次再热机组
主机参数
G115
热力系统
new generation ultra-supercritical unit with double re-heating cycles
main equipment parameter
G115
thermal system
