化工学报2016，Vol.67Issue(12)：5237-5243,7.DOI:10.11949/j.issn.0438-1157.20160733
生物质锅炉积灰特性与露点腐蚀
Characteristics of ash deposit and dew point corrosion in biofuel boiler
摘要
Abstract
The coupling characteristics between ash deposit and dew point corrosion of deep-cooling flue gas on ND steel and 316L stainless steel (control) was investigated in a 65 t·h−1 circulating fluidized bed biofuel boiler. The ash deposit and corrosion layer were studied by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Results indicated that the deposits on tube surface could be classified as layers of corrosion, coupling and ash deposit (NH4Cl、SiO2 and (NH4)2SO4). The coupling layer contained ash deposit and metal corrosion by-product, which was prone to spall off because of strong adhesion to the ash deposit layer. The corrosion layer, mainly composed of metal compounds of chlorides and oxides, reduced dramatically in thickness with the decrease of inlet water temperature. The degree of corrosion of ND steel increased sharply when wall temperature was below water dew point of flue gas. ND steel showed corrosion resistance inferior to 316L stainless steel at experimental conditions.关键词
腐蚀/沉积物/烟道气/生物燃料Key words
corrosion/deposition/flue gas/biofuel分类
能源科技引用本文复制引用
马海东,王云刚,赵钦新,陈衡,梁志远,金鑫..生物质锅炉积灰特性与露点腐蚀[J].化工学报,2016,67(12):5237-5243,7.基金项目
国家自然科学基金项目（51606144）；高等学校博士学科点专项科研基金项目（20130201110045）。@@@@supported by the National Natural Science Foundation of China (51606144) and the Specialized Research Fund for the Doctoral Program of Higher Education (20130201110045) （51606144）
