发电技术 ›› 2026, Vol. 47 ›› Issue (2): 285-294.DOI: 10.12096/j.2096-4528.pgt.260206

• 发电及环境保护 • 上一篇    

基于锅-炉耦合的超超临界锅炉水冷壁流量分配及工质出口温度分布研究

陈智海1,2, 谭鹏1,2, 吴凡1,2, 谢树涛2, 张成2, 方庆艳2, 陈刚2   

  1. 1.华中科技大学能源与动力工程学院,湖北省 武汉市 430074
    2.煤燃烧与低碳利用全国重点实验室(华中科技大学),湖北省 武汉市 430074
  • 收稿日期:2025-05-26 修回日期:2025-07-30 出版日期:2026-04-30 发布日期:2026-04-21
  • 作者简介:陈智海(1999),男,硕士研究生,研究方向为燃煤锅炉的灵活运行,czh07060509@163.com
    谭鹏(1989),男,博士,副教授,研究方向为融合数据与机理的发电过程智能建模、数据驱动的智能发电控制与运行优化,本文通信作者,tanpeng@hust.edu.cn
  • 基金资助:
    国家重点研发计划项目(2022YFB4100401)

Study of Water Wall Flow Distribution and Mass Outlet Temperature Distribution in Ultra-Supercritical Boiler Based on Pot-Furnace Coupling

ZhiHai CHEN1,2, Peng TAN1,2, Fang WU1,2, ShuTao XIE2, Cheng ZHANG2, QingYang FANG2, Gang CHEN2   

  1. 1.School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, China
    2.State Key Laboratory of Coal Combustion and Low Carbon Utilization (Huazhong University of Science and Technology), Wuhan 430074, Hubei Province, China
  • Received:2025-05-26 Revised:2025-07-30 Published:2026-04-30 Online:2026-04-21
  • Supported by:
    National Key Research and Development Program of China(2022YFB4100401)

摘要:

目的 深度调峰下,水冷壁超温爆管是锅炉安全运行面临的关键问题之一,为此,提出了一种锅-炉耦合仿真方法。 方法 通过燃烧数值模拟获得各工况下水冷壁壁面热流分布,然后基于Modelica建立工质侧计算模型,以便于对某660 MW超超临界锅炉水冷壁流量分配及工质出口温度分布进行研究。 结果 水冷壁出口工质关键参数误差均在3%以内,验证了模型的可靠性。螺旋水冷壁流量分配在负荷较高时表现负流量特性,在超低负荷时表现正流量特性。垂直水冷壁始终呈负流量特性,在100%汽轮机热耗率验收(turbine heat acceptance,THA)工况下,垂直水冷壁出口工质的最大温差为37.60 ℃,在40%THA和30%THA工况下,最大温差分别增至138.33 ℃和141.27 ℃。(超)低负荷垂直水冷壁前后墙出口工质温度高且温差大,左右侧墙出口工质温度低且温差小。 结论 研究成果可为锅炉深度调峰下的安全运行提供参考。

关键词: 火力发电, 锅炉安全, 流量分配, 工质温度, 水动力, 锅-炉耦合, 深度调峰

Abstract:

Objectives Water wall over-temperature tube burst under deep peaking is one of the key problems facing the safe operation of boilers. A coupled boiler-furnace simulation method is proposed. Methods The heat flow distribution on the water wall surface under each operating condition is obtained by numerical simulation of combustion. Then, a calculation model of the mass side is established on the basis of Modelica, so as to study the distribution of water wall flow rate and the temperature distribution of the mass outlet of a 660 MW ultra-supercritical boiler. Results The errors of key parameters of water wall outlet mass are all within 3%, which verifies the reliability of the model. The spiral water wall flow distribution shows negative flow characteristics at high loads and positive flow characteristics at ultra-low loads. Vertical water wall always shows negative flow characteristics, and the maximum temperature difference of the vertical water wall outlet mass is 37.60 ℃ at 100% turbine heat acceptance (THA), and increases to 138.33 ℃ and 141.27 ℃ at 40% THA and 30% THA, respectively. The (ultra) low load vertical water wall outlet mass temperature of the front and rear walls is high and the temperature difference is large, while the outlet mass temperature of the left and right side walls is low and the temperature difference is small. Conclusions The research results can provide a reference for the safe operation of the boiler under deep peaking.

Key words: thermal power generation, boiler safety, flow distribution, working fluid temperature, hydrodynamics, boiler-furnace coupling, deep peaking

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