Co-firing bituminous coal in a W-shaped flame boiler with closed intermediate storage pulverization system

ZHANG Yong; WANG Huajian; WANG Yang; LI Chao; TANG Rongfu; XIE Lei; LAN Xiaohong; LAN Yongsheng; ZUO Tianxiang

doi:10.19666/j.rlfd.202406122

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Co-firing bituminous coal in a W-shaped flame boiler with closed intermediate storage pulverization system

更新时间：2025-09-28

- Co-firing bituminous coal in a W-shaped flame boiler with closed intermediate storage pulverization system
- Thermal Power Generation Vol. 54, Issue 3, Pages: 99-107(2025)
- 作者机构：
  
  1. 皖能马鞍山发电有限公司
  2. 西安热工研究院有限公司
  3. 华能重庆珞璜发电有限责任公司
  4. 华能辛店发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202406122
  CLC： TM621.2
- Published：2025
- 稿件说明：
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ZHANG Yong, WANG Huajian, WANG Yang, et al. Co-firing bituminous coal in a W-shaped flame boiler with closed intermediate storage pulverization system[J]. Thermal power generation, 2025, 54(3): 99-107.
DOI：

ZHANG Yong, WANG Huajian, WANG Yang, et al. Co-firing bituminous coal in a W-shaped flame boiler with closed intermediate storage pulverization system[J]. Thermal power generation, 2025, 54(3): 99-107. DOI： 10.19666/j.rlfd.202406122.

摘要

闭式中储式制粉系统W型火焰锅炉设计燃用低挥发分贫煤和无烟煤，大比例掺烧烟煤可以提升锅炉煤种适应范围和灵活性调峰运行能力，但需要解决制粉系统防爆、送粉系统防烧损和炉内防结焦等技术难题。提出采用低温炉烟调温的全炉烟惰性防爆制粉技术，可以有效解决制粉系统防爆燃难题；结合送粉介质降温和燃烧器适应性改造技术，可以有效防止一次风管和燃烧器烧损；再辅以卫燃带优化和燃烧优化调整技术，可以有效控制炉内结焦的同时改善炉内燃烧的性能指标。综合以上技术措施，实现了闭式钢球磨煤机中储式制粉系统W型火焰锅炉安全经济掺烧70%烟煤的目标。

Abstract

The W-shaped flame boiler with closed middle storage pulverizing system is designed to burn low volatile lean coal and anthracite. Blending coal with high proportion of bituminous coal is able to improve the adaptability of fuel and the flexibility of the boiler. It is necessary to solve the technical problems such as explosion prevention of the pulverizing system

anti-burning of pulverized coal pipes and prevention of serious slagging in the furnace. Therefore

an inert explosion-proof pulverizing technology

in which low temperature flue gas is used for temperature adjustment

is proposed. This method solves the problem of explosion prevention of coal pulverizing system effectively. By increasing the capacity of cooling air from primary fan to reduce the temperature of hot primary air conveying pulverized coal and the adaptability of the burners to blended bituminous

the safety of the primary air pipes and the burners will be guaranteed. With the optimization of refractory belt arrangement and combustion adjustment

this method not only controls the slagging

but also improves the performance of combustion in the furnace effectively. By these integrated technologies presented above

the goal of co-firing 70% bituminous coal safely and economically in the W-shaped flame boiler with closed ball mill medium storage pulverizing system is achieved.

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