燃用高碱煤锅炉的宽负荷对冲燃烧技术研究及应用  

Research and application of wide load opposed firing technology for high-alkali coal fired boilers

作　　者：邓坚 冉燊铭 杨章宁 范贤 王杜佳 郭洋洲 李艳飞 李维成 高国栋 潘绍成 张秀昌 DENG Jian;RAN Shenming;YANG Zhangning;FAN Xian;WANG Dujia;GUO Yangzhou;LI Yanfei;LI Weicheng;GAO Guodong;PAN Shaocheng;ZHANG Xiuchang(Sichuan Province Key Laboratory of Combustion and Flue Gas Cleaning,Chengdu 611731,China;Dongfang Boiler Group Co.,Ltd.,Dongfang Electric Corporation,Zigong 643001,China;Huadian Xinjiang Zhundong Wucaiwan Power Generation Co.,Ltd.,Changji 831700,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]清洁燃烧与烟气净化四川省重点实验室,四川成都611731 [2]东方电气集团东方锅炉股份有限公司,四川自贡643001 [3]华电新疆准东五彩湾发电有限公司,新疆昌吉831700 [4]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2024年第1期73-81,共9页Thermal Power Generation

基　　金：国家重点研发计划项目(2022YFB4100800)。

摘　　要：新疆准东高碱煤是优良的动力煤种,但大比例燃用高碱煤时锅炉设备易发生严重结渣问题,燃用准东煤锅炉的燃烧系统设计原则与提高低负荷稳燃能力的传统技术措施相矛盾。为解决该问题,基于煤粉稳定燃烧机理,研究了节油点火燃烧器布置优化、中层燃烧器交错布置、煤粉浓度在线可调、燃烧器结构优化等措施。某燃用准东高碱煤的350 MW机组对冲燃烧锅炉深度调峰改造项目应用该技术,实现了不投油稳燃负荷低于18%额定负荷。Xinjiang high-alkali coal is a cost-effective power coal,but when it is used in large proportions,boiler equipment is prone to severe slagging problems.The design principles of the combustion system for boilers using Zhundong coal are inconsistent with conventional technical measures to improve low-load stable combustion performance.To solve this problem,based on the mechanism of stable combustion of pulverized coal,measures such as optimized layout of tiny oil ignition burners,interlaced arrangement of middle layer burners,online adjustable coal powder concentration and burner design optimization have been studied.The technology was applied in a 350 MW unit’s deep peak regulation retrofit project using Zhundong high-alkali coal as fuel,and achieved a stable combustion load of less than 18%rated condition without oil injection.

关 键 词：高碱煤 对冲燃烧 超低负荷 稳燃技术 防结渣 工程应用 

分 类 号：TM621.2[电气工程—电力系统及自动化]