锅炉耦合SOFA风门水平摆角及开度偏差的汽温自纠偏研究  

Research on the Self-correction of Steam Temperature Through Coupling SOFA Damper Horizontal Swinging Angle and Opening Deviation

作　　者：康科伟 金贤星 倪淞 温小豪 李培[2] 周永刚[2] Kang Kewei;Jin Xianxing;Ni Song;Wen Xiaohao;Li Pei;Zhou Yonggang(Zhejiang Energy Group Yueqing Power Generation Co.,Ltd.,Wenzhou 325609,Zhejiang Province,China;State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江浙能乐清发电有限责任公司,浙江温州325609 [2]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《发电设备》2024年第6期399-404,共6页Power Equipment

摘　　要：针对某660 MW锅炉高温过热器左右两侧吸热量偏差过大的问题,首先尝试采用同电厂另一台锅炉的自纠偏方法,研究分离燃尽风(SOFA)风门开度偏差与汽温偏差的关系,当该方法未达到预期效果后,进一步分析了失效原因。通过耦合SOFA风门水平摆角及开度偏差方法,成功建立了二者与锅炉左右两侧汽温偏差的关系。结果表明:通过调整SOFA风门水平摆角,可以有效地改变炉膛内切圆左右两侧的推力分布;调整上3层SOFA风门开度,当左侧风门开度增大、右侧风门开度减小时,过热器两侧吸热量呈现左侧增大、右侧减小的变化趋势,使过热器两侧汽温偏差随SOFA风门开度偏差变化呈先减小后逐渐稳定的趋势。投运耦合SOFA风门水平摆角及开度偏差的锅炉汽温自纠偏优化控制系统,成功实现了锅炉汽温的自纠偏控制。To address the issue of large heat absorption deviation between the left and right of the high-temperature superheater in a 660 MW boiler,an initial attempt was made to apply the self-correcting method used in another boiler of the same power plant.This involved studying the relationship between the damper opening deviation of the separated overfire air(SOFA)and steam temperature deviation.When this approach did not achieve the expected results,the failure causes were further analysed.By coupling the SOFA damper horizontal swinging angle and opening deviation,the relationship between these factors and the steam temperature deviation on the left and right of the boiler was established successfully.Results show that,adjusting the SOFA damper horizontal swinging angle can effectively change the thrust distribution on the left and right of the furnace incircle.Adjusting the opening of SOFA dampers on the upper three layers,it is found that when the opening of the left dampers increases and the opening of the right dampers decreases,the heat absorption increases on the left side and decreases on the right side,which makes the steam temperature deviation between the two sides of the superheater decrease firstly and then stabilize gradually with the adjustment of SOFA damper opening deviation.The implementation of the self-correcting optimization control system,which couples the SOFA damper horizontal swinging angle and opening deviation,successfully achieves self-correcting control of the boiler steam temperature.

关 键 词：四角切圆燃烧锅炉 汽温偏差 SOFA 水平摆角 风门开度 

分 类 号：TM621[电气工程—电力系统及自动化]