生物质灰结渣和腐蚀特性

李海英; 张泽; 姬爱民; 赵荣煊; 杨鹏

doi:10.3969/j.issn.1674-991X.2017.01.016

生物质灰结渣和腐蚀特性

doi: 10.3969/j.issn.1674-991X.2017.01.016

李海英¹,
张泽^1,*, ,,
姬爱民¹,
赵荣煊¹,
杨鹏²

1.
华北理工大学冶金与能源学院,河北唐山 063009
2.
中国农业科学院环境保护科研监测所,天津 300191

详细信息

作者简介:
李海英(1971—),女,教授,博士,主要从事工业节能技术开发,zhguijie@vip.sina.com

通讯作者:
张泽 E-mail: 877083668@qq.com

中图分类号: X705
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出版历程
- 收稿日期: 2016-05-24
- 刊出日期: 2017-01-20

Behavior of slagging and corrosion of biomass ash

1.
School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China
2.
Institute of Agro-environmental Protection, Ministry of Agriculture, Tianjin 300191, China

More Information

Corresponding author: Ze ZHANG E-mail: 877083668@qq.com

摘要

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。
- 生物质灰 /
- 结渣 /
- 腐蚀 /
- 防治措施
Abstract: The problems of slagging and corrosion of heating surface caused by biomass ash formed during the combustion of biomass were concerned. Through analyzing the characteristics of biomass ash, such as the content of element and mineral, physical and chemical properties and ash fusion, the slagging formation process and the mechanism of the heating surface corrosion were discussed. It was found that biomass slagging is caused by the following reasons. Firstly, the forming of the alkali metal sulphates and chloride decreased the fusion point and increased the stickiness in the surface of the fly ash; and then the slagging was formed on the heating surface. In addition, based on the formation of the HCl and Cl₂ during high temperature, the heating surface of the boiler will be corroded owing to Fe reaction with the HCl and Cl₂. According to the analysis of the influence factors on slagging and corrosion including the content of the fuels, temperature in the furnace, materials of the heating surface and so on, it was proposed that some measures such as co-firing of biomass and coal, additives in biomass, biomass fuel washed with water and metal anticorrosion on heating surface, be used to prevent the problems of slagging and corrosion.
- biomass ash /
- slagging /
- corrosion /
- prevention measures

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