氢氧化钙对垃圾焚烧炉受热面积灰腐蚀的影响  

Effect of Calcium Hydroxide on Heating Surface Corrosion of Waste Incinerator

作　　者：欧阳小平 徐海峰 周金鹏 赖建华 吴海泓 马晓茜[3] 余昭胜[3] 陈丽梅[3] 林延[3] 

机构地区：[1]广东省特种设备检测研究院惠州检测院,广东惠州516002 [2]光大环保能源(博罗)有限公司,广东惠州516100 [3]华南理工大学电力学院,广州510640

出　　处：《新能源进展》2017年第6期417-425,共9页Advances in New and Renewable Energy

基　　金：广东省质量技术监督局科技项目(2017CT08)

摘　　要：为减缓垃圾焚烧炉受热面的腐蚀,以广东惠州光大博罗垃圾发电厂为研究对象,往炉膛中添加氢氧化钙,取外管壁腐蚀层以及积灰,用扫描电镜进行微观分析,并分别用能谱仪和X射线荧光光谱仪对积灰进行局部以及全元素组成分析。结果表明,添加Ca(OH)_2能有效吸收烟气中含Cl、S等酸性气体,S在水冷壁腐蚀层的含量由25.33%降至8.17%,硫腐蚀显著减缓;而Na、K等碱金属在水冷壁腐蚀层的含量分别由0.89%、0.44%上升至4.81%、3.11%,一定程度上加速了碱金属腐蚀。水冷壁积灰中Fe的检出量由8.42%下降至4.54%,综合酸性气体腐蚀与碱金属腐蚀两方面的作用,添加Ca(OH)_2能有效缓解焚烧炉高温腐蚀。In order to slow down the corrosion of the heating surface in the incineration furnace, the Everbright Environment Energy’s （Boluo） power plant in Huizhou, Guangdong province, was selected for the study. During the study, calcium hydroxide was added to the furnace, the corrosion layer and deposition were analyzed by Scanning Electron Microscopy, and the analysis of the local and all-element components of the deposition was carried out by the Energy Dispersive Spectrometer and the X-ray Fluorescence Spectrometer. Results showed that, the acid gases which contain Cl and S were absorbed by calcium hydroxide effectively. S content in the tube layer decreased from 25.33% to 8.17%, and sulfur corrosion was greatly slowed down. Alkali metal content such as Na and K increased from 0.89% and 0.44% to 4.81% and 3.11%, and the alkali metal corrosion was accelerated to a certain extent. The amount of Fe in the deposition of the tube decreased from 8.42% to 4.54%, which proved that the high temperature corrosion was effectively alleviated by adding calcium hydroxide on considering both acid gas corrosion and alkali metal corrosion.

关 键 词：受热面 积灰腐蚀 微观分析 氢氧化钙 垃圾焚烧炉 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]