热力发电2018，Vol.47Issue(3)：18-25,8.DOI:10.19666/j.rlfd.201706140
富氧燃烧模式下水冷壁高温腐蚀实验
Experimental study on high temperature corrosion behavior of water wall materials during oxy-fuel combustion
摘要
Abstract
Oxy-fuel combustion (OFC) is one of the most promising technologies for CO2 capture in coal combustion process,and is attracting more and more attentions.However,under OFC operating conditions,the concentrations of CO2,H2O,SO2 and SO3 significantly increase,which might aggravate the corrosion threat.In this study,high temperature corrosion tests for water wall materials (20G,12Cr1MoV) were conducted in tube furnace with simulated OFC flue gas.The microstructure and composition of the oxide layer were analyzed by SEM-EDS and XRD.The experimental results show that,the high concentration of CO2 accelerates the high temperature corrosion of water wall materials.In OFC atmosphere (CO2/O2/SO2),the mass gain rate can be aggravated by 10％～30％ compared with that in air combustion atmosphere (N2/O2/SO2),and the component of oxide layer is mainly magnetite.In the OFC reducing atmosphere (CO2/CO/SO2/H2S),the component of oxide layer is mainly magnetite and Iron(Ⅱ) sulfide.For both water wall materials tested in this study,the corrosion mass gain curves are parabolic,and the high moisture content in flue gas accelerates the corrosion rate.关键词
富氧燃烧/烟气再循环/水冷壁/20G/12Cr1MoV/高温腐蚀/腐蚀速率/CO2捕集Key words
oxy-fuel combustion/flue gas recirculation/water wall/20G/12Cr1MoV/high temperature corrosion/corrosion rate/CO2/capture分类
能源科技引用本文复制引用
张兰,王昭,张嘉烨,李艳,杨涛,王学斌,谭厚章..富氧燃烧模式下水冷壁高温腐蚀实验[J].热力发电,2018,47(3):18-25,8.基金项目
国家自然科学基金项目(51676157)National Natural Science Foundation of China (51676157) （51676157）
