超临界W型火焰锅炉结构效应导致前墙水冷壁温差偏大问题的研究与治理  

Research and Treatment of the Large Temperature Difference of Water Cooling Wall in Front Wall Caused by Structural Effect of Supercritical W-Type Flame Boiler

作　　者：黄丹[1] 曾小义 冷冰川 张荣 贺道先 罗立军 陈绍敏[1] HUANG Dan;ZENG Xiaoyi;LENG Bingchuan;ZHANG Rong;HE Daoxian;LUO Lijun;CHEN Shaomin(School of Power Engineering,Chongqing Electric Power College,Chongqing 400043,China;College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China;Yunnan Provincial Energy Investment Group Co.,Ltd.,Kunming 652500,China;Yunnan Energy Investment Weixin Energy Co.,Ltd.,Zhaotong 657000,China)

机构地区：[1]重庆电力高等专科学校动力工程学院,重庆400043 [2]四川大学材料科学与工程学院,四川成都610065 [3]云南省能源投资集团有限公司,云南昆明652500 [4]云南能投威信能源有限公司,云南昭通657000

出　　处：《锅炉技术》2024年第5期72-78,共7页Boiler Technology

摘　　要：为解决某锅炉前墙水冷壁温差偏大导致水冷壁频繁超温爆管的问题,从管外传热和管内吸热两方面对热偏差进行分析,发现采用内螺纹管技术的水冷壁管具有自补偿特性,通过数值模拟试验发现结构效应带来温度场和气流场的变化对热偏差影响显著,是造成水冷壁变形和泄漏的主要原因,进而提出二次风差异配风、水冷壁前墙喷涂绝热涂料和优化卫燃带等治理方案,成功治理了水冷壁超温爆管问题.To solve the problem of frequent water wall tube overtemperature and tube failure of the front water wall of a boiler,the thermal deviation from two aspects of heat transfer outside the pipe and heat absorption inside the pipe were analyzed.It is found that the water wall with the rifled tube has self-compensation characteristics.Through numerical simulation experiments,it is found that the change of temperature field and airflow field caused by structural effect has significant influence on the thermal deviation.It is the main reason for the deformation and leakage of the water wall.Then,the treatment schemes such as differential distribution of secondary air,thermal insulation coating of the front water wall and optimization of the combustion zone are put forward,which successfully control the problem of overtemperature tube failure of the water wall.

关 键 词：超临界 W火焰锅炉 结构效应 水冷壁 超温损坏 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]