生物质灰结渣和腐蚀特性

被引:31
作者
李海英 [1 ]
张泽 [1 ]
姬爱民 [1 ]
赵荣煊 [1 ]
杨鹏 [2 ]
机构
[1] 华北理工大学冶金与能源学院
[2] 中国农业科学院环境保护科研监测所
关键词
生物质灰; 结渣; 腐蚀; 防治措施;
D O I
暂无
中图分类号
TK6 [生物能及其利用];
学科分类号
080707 [能源环境工程];
摘要
针对目前生物质燃料燃烧过程中存在的灰结渣和受热面腐蚀问题,通过分析生物质灰的元素成分、矿物组成、理化特性及熔融特性等,探讨了灰结渣的形成过程和受热面腐蚀的机理。研究表明:生物质燃烧灰结渣的主要原因为碱金属硫酸盐及氯化物的形成降低了飞灰熔点,增加了飞灰的表面黏性,黏结在受热面表面形成结渣;此外,由于燃料中的氯化物在高温下参与氧化还原反应生成HCl和Cl2,再与金属受热面发生化学反应,形成了受热面腐蚀。通过研究燃料成分、炉膛温度、过量空气系数、受热面材质等因素对结渣和受热面腐蚀的影响,得出可以采用生物质与煤混烧、加入添加剂、水洗及金属表面防腐等防治措施避免或减少结渣和腐蚀现象发生。
引用
收藏
页码:107 / 113
页数:7
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