摘要
超超临界汽轮机发电技术是高效率和低排放发电的一个选择。它的蒸汽温度和压力超过其用在传统超临界电厂中的数值。这种新的蒸汽工况对汽轮机组提出了新的要求。可以通过采用3DVT(M可变反动度三维设计)的先进叶型和叶片通道技术、新开发的钛制末级叶片、先进的密封工艺以及能够应付高达30MPa/600℃/620℃蒸汽条件的所有高温部件材料的发展等,来应对效率增加的要求。文章对超超临界汽轮机组部件设计、密封工艺、叶片通道形式以及材料研究提出要求及设计解决方案。对未来主蒸汽和再热蒸汽达700℃时汽轮机的设计提出设想。
The ultra supercritical fossil power plant is an option ot electricity generation for high-efficiency ana lowemissions. It is based on increased steam temperatures and pressures, beyond those traditionally employed for supercritical plants. This steam conditions put new requirements on the steam turbine turboset. The challenge of efficiency increase will be handled by advanced blade profile and blade path technology named 3DV^TM （3 dimensional design with variable reaction）, newly developed end stage blades made of titanium, advanced sealing technology and material development of all high temperature components to cope with steam conditions up to 30 MPa/600℃/620℃. This paper presents demands and design solutions on the ultra supercritical steam turbine for component design, sealing technology, blade path set up and material perspective. An outlook will be presented towards a steam turbine design for future 700℃ main and reheat steam application.
