Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler

MAO Kaiyuan; NIE Xin; XIE Haiyan; YANG Dong; WANG Fengjun; HUANG Ying

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Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler

Thermal Power Generation Vol. 46, Issue 8, Pages: 36-41(2017)

更新时间：2025-05-30

- Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler
- 作者机构：
  
  1. 西安交通大学动力工程多相流国家重点实验室
  2. 哈尔滨锅炉厂有限责任公司高效清洁燃煤电站锅炉国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2017
- 稿件说明：
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MAO Kaiyuan, NIE Xin, XIE Haiyan, et al. Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler[J]. Thermal Power Generation2017, 46(8): 36-41.
DOI：

MAO Kaiyuan, NIE Xin, XIE Haiyan, et al. Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler[J]. Thermal Power Generation2017, 46(8): 36-41. DOI：

摘要

大唐雷州电厂超超临界1 000 MW二次再热机组锅炉为Π型布置。由于Π型锅炉汽水流程复杂

可能会存在流量分配不均的风险

导致水冷壁超温造成事故。在宽负荷运行和快速变负荷调峰过程中

由于给煤量的扰动

水冷壁易出现流动不稳定现象。本文采用流动网络系统方法计算了锅炉在BMCR负荷时的质量流速分配、工质汽温以及金属温度分布

并对30%THA负荷进行了流动不稳定性校核

并在此基础上

分析了水冷壁的优化设计及安全运行特性。计算结果表明

水冷壁能避免管间应力过大和拉裂

在施加热负荷扰动后流量均能恢复稳定

锅炉水冷壁运行是安全可靠的。

Abstract

The ultra supercritical 1 000 MW unit boiler with double-reheat cycle in Datang Leizhou Power Plant adopts Π type arrangement. Due to the complexity of water flow in Π 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.

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Related Institution

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