基于集成耦合传热模型的燃煤锅炉高温腐蚀综合模型  

A Comprehensive High Temperature Corrosion Model Based on Integrated Coupled Heat Transfer Model for Coal-fired Boiler

作　　者：李俊杰 闫靖文 金东昊 刘欣 张超群 李驰 王赫阳 LI Junjie;YAN Jingwen;JIN Donghao;LIU Xin;ZHANG Chaoqun;LI Chi;WANG Heyang(School of Mechanical Engineering,Tianjin University,Tianjin 300072,China;Yantai Longyuan Power Technology Co.,Ltd.,Yantai 264006,Shandong Province,China)

机构地区：[1]天津大学机械工程学院,天津300072 [2]烟台龙源电力技术股份有限公司,山东烟台264006

出　　处：《动力工程学报》2023年第8期983-991,共9页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金青年科学基金资助项目(51906176)。

摘　　要：为准确预测锅炉水冷壁高温腐蚀分布,开发了一个考虑管壁温度和H_(2)S体积分数等关键因素的高温腐蚀综合模型。由于管壁温度受锅炉烟气侧和蒸汽侧传热的共同影响,且炉膛与管道尺寸差异较大,难以在单一模型框架内进行模拟,因此开发了一个耦合传热模型。该模型分别采用三维计算流体力学(CFD)模型和一维流动模型模拟锅炉烟气侧和蒸汽侧的流动和传热过程,以准确计算管壁温度,最后将高温腐蚀模型应用于某350MW超临界锅炉中。结果表明:水冷壁上可能形成局部高温区,尽管该区域内H_(2)S体积分数降低,但管壁温度显著升高,导致水冷壁腐蚀速率大幅加快。To accurately predict the high temperature corrosion of boiler water wall,a comprehensive high temperature corrosion model that incorporates the effects of both tube temperature and H_(2)S concentration was proposed.The tube temperature depends on both the gas side heat transfer and the steam side heat transfer of the boiler,which is difficult to be simulated within a single model framework due to the great dimention difference between furnace and tube.Thus,a coupled heat transfer model was developed to provide accurate prediction of tube wall temperature.This model involved a three-dimensional CFD model and a one-dimensional hydrodynamic model to separately simulate the flow and heat transfer processes of the gas and the steam sides of the boiler.The corrosion model was applied to a 350MW supercritical boiler.Results show that local high tube temperature zones can be formed on the water wall,leading to a substantial acceleration of wall corrosion rate despite the relatively low H_(2)S concentration there.

关 键 词：燃煤锅炉 高温腐蚀 管壁温度 耦合传热模型 计算流体力学 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]