发电技术 ›› 2026, Vol. 47 ›› Issue (2): 295-303.DOI: 10.12096/j.2096-4528.pgt.260207

• 发电及环境保护 • 上一篇    

600 MW超临界低热值褐煤八角切圆锅炉低负荷稳燃技术

郭宝群1, 岳嘉豪2, 丛茂展2, 刘洪鹏2, 孙佰仲2   

  1. 1.国能宝清煤电化有限公司,黑龙江省 双鸭山市 155630
    2.东北电力大学能源与动力 工程学院,吉林省 吉林市 132011
  • 收稿日期:2025-10-21 修回日期:2025-12-20 出版日期:2026-04-30 发布日期:2026-04-21
  • 作者简介:郭宝群(1987),男,助理工程师,研究方向为热能工程,17045904@ceic.com
    岳嘉豪(2001),男,硕士研究生,研究方向为低碳燃烧和污染物控制,1073955018@qq.com
    丛茂展(1999),男,硕士研究生,研究方向为低碳燃烧和污染物控制,1714636398@qq.com
    刘洪鹏(1981),男,博士,副教授,主要研究方向为生物质热转化利用技术、油页岩综合利用技术,hongpeng5460@126.com
    孙佰仲(1973),男,博士,教授,主要研究方向为生物质类废弃物热转化技术的理论与应用、清洁能源供热技术,本文通信作者,sunbaizhong@126.com
  • 基金资助:
    吉林省自然科学基金项目(20210101072JC)

Low-Load Stable Combustion Technology of 600 MW Supercritical Low-Calorific Value Lignite Octagonal Tangentially Fired Boiler

Baoqun GUO1, Jiahao YUE2, Maozhan CONG2, Hongpeng LIU2, Baizhong SUN2   

  1. 1.Guoneng Baoqing Coal Electrification Co. , Ltd. , Shuangyashan 155630, Heilongjiang Province, China
    2.School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132011, Jilin Province, China
  • Received:2025-10-21 Revised:2025-12-20 Published:2026-04-30 Online:2026-04-21
  • Supported by:
    Jilin Provincial Natural Science Foundation Project(20210101072JC)

摘要:

目的 随着电网中高比例的新能源发电机组接入,对传统火电机组深度调峰能力提出了更高要求,而低热值褐煤锅炉在低负荷下难以实现稳燃,因此,需要根据实际情况对其进行优化调整。 方法 通过改变燃烧组织方式来压缩火焰中心的高度并提高火焰的充满度,结合运行参数优化,实现锅炉在低负荷条件下的稳燃。为了预测稳燃效果,建立了综合流动、传热、传质和燃烧的模型,对600 MW超临界低热值褐煤八角切圆锅炉在不同负荷(从100%降至35%)下的燃烧特性开展了研究。 结果 通过局部集中给粉和采用1、3、4、5、7号磨煤机的运行方式,使得燃用水分为50%、热值为8.85 MJ/kg的600 MW超临界八角切圆锅炉的最低稳燃负荷达到35%,且在各个负荷下炉膛出口的NO x 浓度变化不大。 结论 采用局部集中给粉和磨煤机运行方式的优化,可以解决低热值褐煤锅炉在低负荷工况下难以实现稳燃的难题,提高了电厂深度调峰的能力。

关键词: 火电机组, 八角切圆锅炉, 深度调峰, 低负荷稳燃, 数值模拟, 低热值褐煤, 燃烧特性

Abstract:

Objectives With the high proportion of new energy generation units connected to the power grid, higher requirements are put forward for the deep peak shaving capacity of traditional thermal power units. However, low-calorific value lignite boilers are difficult to burn stably under low-load conditions, so they need to be optimized and adjusted according to the actual situation. Methods By changing the combustion organization to compress the height of the flame center and improve the flame filling degree, combined with optimized operating parameters, stable combustion of the boiler under low-load conditions can be achieved. To predict the stable combustion effect, a comprehensive model of flow, heat transfer, mass transfer and combustion is established to study the combustion characteristics of a 600 MW supercritical low-calorific value lignite octagonal tangentially fired boiler at different loads (from 100% to 35%). Results Through local centralized coal feeding and operating No. 1, 3, 4, 5 and 7 coal mills, the minimum stable combustion load of a 600 MW supercritical octagonal tangentially fired boiler with a moisture content of 50% and a calorific value of 8.85 MJ/kg can reach 35%, and the NO x concentration at the furnace outlet does not change significantly under various loads. Conclusions Optimizing local centralized coal feeding and coal mill operation modes can solve the problem of difficult stable combustion of low-calorific value lignite boilers under low-load conditions, and improve the deep peak shaving capacity of power plants.

Key words: thermal power units, octagonal tangentially fired boiler, deep peak shaving, low-load stable combustion, numerical simulation, low-calorific value lignite, combustion characteristics

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