旋流煤粉燃烧器低负荷稳燃技术探讨  

Discussion on Low-load Stable Combustion Technology of Swirl Pulverized-coal Burner

作　　者：宋民航 黄云[1] 黄骞 李水清[2] SONG Minhang;HUANG Yun;HUANG Qian;LI Shuiqing(State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Haidian District,Beijing 100190,China;Department of Energy and Power Engineering,Tsinghua University,Haidian District,Beijing 100084,China)

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家实验室,北京市海淀区100190 [2]清华大学能源与动力工程系,北京市海淀区100084

出　　处：《中国电机工程学报》2021年第13期4552-4565,共14页Proceedings of the CSEE

基　　金：国家自然科学基金(青年科学基金项目)(52006120);国家重点研发计划项目(2018YFC1903000)。

摘　　要：随着可再生能源发电比例的不断提高,煤电作为基础调节能源,承担着负荷调节的关键角色。作为燃煤锅炉的关键核心设备,旋流煤粉燃烧器的低负荷稳燃性能直接决定着整体锅炉系统的运行可靠性及经济性。该文在总结常规低负荷稳燃措施及其不足的基础上,系统分析了制约旋流煤粉燃烧器低负荷稳燃性能深度提升的主要因素。在此基础上,分别从强化煤粉高效浓缩及高温烟气回流、优化燃烧器运行参数、构建不同负荷下相似的煤粉燃烧特性,以及低负荷下旋流煤粉燃烧机理研究等方面,探讨了提升旋流煤粉燃烧器低负荷稳燃性能的可行性路径及技术措施,为强稳燃能力旋流煤粉燃烧器设计提供了理论及技术借鉴。As the proportion of renewable energy in power generation continues to increase, coal-fired boilers lead a function of basic adjustable energy source and play a key role in flexible peak power regulation. As the key core equipment of the coal-fired boiler, the stable combustion performance of swirl pulverized-coal burner under low load directly determines the operational reliability and economy of the overall boiler system. Based on the summary of conventional low-load stable combustion measures and their shortcomings, this work systematically analyzed the main factors that restrict the deep improvement of the low-load stable combustion performance of swirl pulverized coal burners. On this basis, from four aspects, including enhancing the high-efficiency concentration of pulverized coal and high-temperature flue gas recirculation, optimizing the burner operation parameters, constructing similar pulverized coal combustion characteristics under different loads, and conducting systematic study on swirl pulverized-coal combustion mechanism at low loads, the feasible paths and technical measures to improve the low-load stable combustion performance of the swirl pulverized coal burner were discussed in detail, and a certain theoretical and technical reference for the design of the swirl pulverized coal burner with strong combustion stability are provided.

关 键 词：旋流燃烧器 煤粉燃烧 燃烧器设计 低负荷 运行 稳燃 

分 类 号：TK16[动力工程及工程热物理—热能工程]