电站燃煤锅炉新型煤粉分配器的研发及应用  

Research and application of new pulverized coal distributor for power plant coal-fired boiler

作　　者：闫超[1] 廖伟辉[1] 张锋[2,3] 晋中华 吕兴城[1] 翟利军 雷航 王志超 YAN Chao;LIAO Weihui;ZHANG Feng;JIN Zhonghua;LYU Xingcheng;ZHAI Lijun;LEI Hang;WANG Zhichao(Guangdong HonghaiwanPower Generation Co.,Ltd.,Shanwei 516600,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Shaanxi Engineering Research Center of Coal Fired Boiler Environmental Protection,Xi’an 710054,China;Xi’an Yitong ThermalTechnology Service Co.,Ltd.,Xi’an 710032,China)

机构地区：[1]广东红海湾发电有限公司,广东汕尾516600 [2]西安热工研究院有限公司,陕西西安710054 [3]陕西省燃煤电站锅炉环保工程技术研究中心,陕西西安710054 [4]西安益通热工技术服务有限责任公司,陕西西安710032

出　　处：《热力发电》2023年第4期159-166,共8页Thermal Power Generation

基　　金：陕西省重点研发计划项目(2022GY-156)。

摘　　要：为减小制粉系统风粉分配偏差,优化锅炉燃烧工况,拓展煤粉分配器的应用范围,需研制新型煤粉分配器。通过试验台模型试验的方法研发新型煤粉分配器,完成了分配器模型的结构设计,研究了新型煤粉分配器的粉量调节挡板阻力特性、风粉分配调节特性、阻力调节对分配特性的影响和系统风速对分配特性的影响等分配器关键性能。模型试验和工程应用结果表明:新型煤粉分配器能有效将送粉管道的风量偏差控制在±5%,粉量偏差控制在±10%;某电厂3号锅炉完成新型煤粉分配器工程改造及调平试验后,能有效减小炉膛热负荷偏差,可将改造前最大偏差达150℃的两金属壁温点的偏差控制在15℃内。新型煤粉分配器的研发和工程应用,对减小制粉系统风粉分配偏差、解决锅炉运行中出现的偏烧、超温、高温腐蚀等系列问题有一定的指导和借鉴意义。In order to reduce the air and pulverized coal distribution deviation of pulverized coal system, optimize the boiler combustion condition and expand the application range of pulverized coal distributor, a new pulverized coal distributor needs to be developed. By means of test bench model test, a new type pulverized coal distributor is developed. The structural design of the distributor model is completed, and the key performance of the distribution is studied, such as the effects of the pulverized coal distributor’s coal amount damper resistance characteristics, the air and pulverized coal distribution and regulating characteristics, and resistance regulation on the distribution characteristics, as well as the effect of system air speed on the distribution characteristics. The results of model test and engineering application show that, the new pulverized coal distributor can effectively control the air volume deviation of the pulverized coal delivery pipeline within ±5% and pulverized coal deviation within ±10%. After the engineering transformation and leveling test of the new pulverized coal distributor for No.3 boiler of a power plant, the thermal load deviation of furnace can be effectively reduced, and the deviation of the two metal wall temperature points, which can reach 150 ℃ before transformation, can be controlled within 15 ℃, which greatly improves the safety and reliability of the boiler operation. The development and engineering application of the new pulverized coal distributor have certain guidance and reference significance for reducing the distribution deviation of pulverized coal in pulverized coal system and solving the series of problems such as partial burning, over temperature and corrosion in boiler operation.

关 键 词：新型煤粉分配器 HP1003中速磨煤机 制粉系统改造 风粉分配 

分 类 号：TM621.2[电气工程—电力系统及自动化]