发电技术 ›› 2025, Vol. 46 ›› Issue (4): 849-856.DOI: 10.12096/j.2096-4528.pgt.23136

• 发电及环境保护 • 上一篇    

循环流化床锅炉宽负荷一体化脱硫建模研究

张帅柠1, 高明明1, 王勇权1, 王唯铧1, 于浩洋1, 黄中2   

  1. 1.新能源电力系统国家重点实验室(华北电力大学),北京市 昌平区 102206
    2.清华大学能源与动力工程系,北京市 海淀区 100084
  • 收稿日期:2024-05-28 修回日期:2024-09-01 出版日期:2025-08-31 发布日期:2025-08-21
  • 通讯作者: 高明明
  • 作者简介:张帅柠(2000),男,硕士研究生,研究方向为循环流化床、深度调峰、污染物超低排放优化控制,505517337@qq.com
    高明明(1979),男,博士,副教授,博士生导师,研究方向为发电过程智能测控技术与应用、新能源发电综合测控技术与应用,本文通信作者,gmm1@ncepu.edu.cn
    于浩洋(1996),男,博士研究生,研究方向为发电过程智能测控技术与应用、人工智能与应用,120202127004@ncepu.edu.cn
    黄中(1983),男,博士,研究员,研究方向为循环流化床燃烧理论与技术、燃烧过程的污染物控制,huangzhong@mail.tsinghua.edu.cn
  • 基金资助:
    国家自然科学基金项目(62276096)

Integrated Modeling Study of Desulfurization in Circulating Fluidized Bed Boilers Under Wide Load Conditions

Shuaining ZHANG1, Mingming GAO1, Yongquan WANG1, Weihua WANG1, Haoyang YU1, Zhong HUANG2   

  1. 1.State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources (North China Electric Power University), Changping District, Beijing 102206, China
    2.Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China
  • Received:2024-05-28 Revised:2024-09-01 Published:2025-08-31 Online:2025-08-21
  • Contact: Mingming GAO
  • Supported by:
    National Natural Science Foundation of China(62276096)

摘要:

目的 随着“双碳”目标的提出,我国清洁能源发电量占比不断提升,为促进新能源发电的消纳,火电机组频繁采用宽负荷调峰运行模式,因此,有必要建立能够适应宽负荷运行工况下的燃煤循环流化床(circulating fluidized bed,CFB)锅炉SO2排放浓度模型,以实现CFB机组SO2超低排放。 方法 通过对SO2生成及脱除动态特性进行深度研究,采用机理分析方法结合质量守恒方程建立了炉膛出口SO2排放浓度动态集总参数模型;通过对模型输入量的合理简化,建立了从给煤给风到脱硫塔出口SO2排放的脱硫全过程一体化动态模型;并利用CFB锅炉实际测量数据中的稳态工况及动态工况数据段进行仿真验证。 结果 所建立的动态模型能够提前约240 s预测净烟气的排放动态趋势。 结论 该模型能够反映炉内脱硫过程的动态特性,在宽负荷工况下具有一定的适用性。

关键词: 燃煤发电, 火电机组, 循环流化床(CFB), SO2排放特性, 动态建模, 宽负荷一体化, 污染物排放

Abstract:

Objectives With the proposal of the “carbon peaking and carbon neutrality” goal, the proportion of clean energy generation in China continues to increase. In order to promote the consumption of new energy generation, thermal power units frequently adopt the wide load peak shaving operation mode. Therefore, it is necessary to establish a SO2 emission concentration model for coal-fired circulating fluidized bed (CFB) boilers that can adapt to wide load operation conditions to achieve ultra-low SO2 emission of CFB units. Methods Through in-depth research on the dynamic characteristics of SO2 generation and removal, a dynamic lumped parameter model of SO2 emission concentration at the furnace outlet is established using mechanism analysis method combined with mass conservation equation. A comprehensive dynamic model for the entire desulfurization process from coal supply and air supply to SO2 emission at the outlet of the desulfurization tower is established by reasonably simplifying the input of the model. The simulation verification is carried out by using the steady-state and dynamic operating condition data segments from the actual measurement data of CFB boilers. Results The established dynamic model can predict the dynamic trend of net flue gas emissions approximately 240 seconds in advance. Conclusions The model can reflect the dynamic characteristics of the desulfurization process in the furnace, and has certain applicability under wide load conditions.

Key words: coal-fired power generation, thermal power unit, circulating fluidized bed (CFB), SO2 emission characteristics, dynamic modeling, wide load integration, pollutant emission

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