热力发电2017，Vol.46Issue(8)：36-41,6.DOI:10.3969/j.issn.1002-3364.2017.08.036
超超临界1000 MW二次再热机组锅炉水动力及流动不稳定性计算分析
Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1000 MW double-reheat unit boiler
摘要
Abstract
The ultra supercritical 1000 MW unit boiler with double-reheat cycle in Datang Leizhou Power Plant adoptsП type arrangement. Due to the complexity of water flow inП type boiler, there exists the risk of uneven distribution of mass flow rate, which may result in the water wall overheat accident. In the processes of unit wide load operation and fast peak shaving, flow instability may occur in the water wall of the boiler due to the coal supply disturbance. To solve these problems, the distributions of mass flow rate, working fluid and metal temperatures in water wall at BMCR load were calculated by flow network system method, and the flow instability was checked for 30％THA load. On this basis, the optimal design and safe operation of the water wall were analyzed. The calculation results show that the water wall can avoid excessive stress between pipes and tension crack. The mass flow rate can finally restore stability after being disturbed by heat load. The water wall is safe and reliable.关键词
超超临界/锅炉/二次再热/水冷壁/水动力特性/流动不稳定性/流动网络系统Key words
ultra supercritical/boiler/double reheat/water wall/hydrodynamic characteristics/flow instability/flow network system分类
能源科技引用本文复制引用
茆凯源,聂鑫,谢海燕,杨冬,王凤君,黄莺..超超临界1000 MW二次再热机组锅炉水动力及流动不稳定性计算分析[J].热力发电,2017,46(8):36-41,6.基金项目
国家重点研发计划项目(2016YFB0600201) National Key Research and Development Program (2016YFB0600201) （2016YFB0600201）
