调峰运行大型余热锅炉设计要点

Key Design Point on Large Capacity HRSG for Cycling Operation

联合循环机组容量的提高,促进余热锅炉的设计大型化。调峰运行要求对余热锅炉适应机组快速启、停和负荷变化要求提出了挑战。针对调峰余热锅炉常会发生的问题,重点阐述余热锅炉关键受压部件产生的疲劳机理,提出相应的设计措施;介绍上海锅炉厂有限公司余热锅炉设计采用的独特Harp型结构和强化的疏水等措施,能有效地防止余热锅炉的低周疲劳,适应大型联合循环调峰运行的要求。

HRSG should be designed to fit for the requirements as fast start and shutdown, fast load change of large capacity CC unit power station. This paper analyses fatigue mechanism of pressure parts of HRSG and presents measures to avoid damage problem on cycling operation HRSG. The SBWL＇s HRSG design characters, such as Harp-Type heating surface and effective drain system, which are suitable for cycling operation, were also introduced.