基于水泥修饰的赤铁矿载氧体污泥化学链燃烧特性研究

牛欣; 沈来宏; 肖军; 蒋守席; 顾海明

基于水泥修饰的赤铁矿载氧体污泥化学链燃烧特性研究

东南大学能源热转换及过程测控教育部重点实验室, 能源与环境学院, 江苏南京 210096

基金项目: 国家自然科学基金(51476029,51276037,51406035,51561125001)资助项目

详细信息

通讯作者:
沈来宏,E-mail:lhshen@seu.edu.cn,Tel:025-83795598,Fax:025-57714489

中图分类号: X705
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出版历程
- 收稿日期: 2015-05-27
- 修回日期: 2015-07-23
- 刊出日期: 2015-11-30

Chemical looping combustion of sewage sludge with oxygen carrier of cement-modified hematite

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Funds: The project was supported by the National Natural Science Foundation of China (51476029, 51276037, 51406035, 51561125001).

摘要

摘要: 采用水泥修饰赤铁矿来提高载氧体的反应活性。实验在1kW_th串行流化床上进行,研究了添加水泥对污泥化学链燃烧特性的影响,考察其长期运行的物化性能。结果表明,在实验工况下,赤铁矿添加水泥后,出口的未燃气体浓度明显下降。燃料反应器温度低于870℃时,水泥的添加使污泥的碳转化率和燃烧效率显著升高。在10h长期运行后,一部分污泥灰沉积在载氧体表面。虽然在反应过程中部分的Fe₂O₃被深度还原,但在长期运行中未出现流化问题和烧结现象。
- 化学链燃烧 /
- 污泥 /
- 赤铁矿 /
- 水泥
Abstract: Chemical looping combustion (CLC) for sewage sludge has a relatively low efficiency using hematite as oxygen carrier. The experiments on improving the reactivity of hematite with cement modified for CLC of sewage sludge in a 1kW_th continuous CLC unit were carried out. Compared to hematite oxygen carrier, the concentrations of unconverted combustible gas rapidly decrease when the cement-hematite is used. Moreover, both carbon conversion and combustion efficiency increase when the cement is added. Although some ash particles deposit on the surface of oxygen carrier and a part of Fe₂O₃ is reduced to FeO, there are no defluidization and sintering problems.
- chemical looping combustion /
- sewage sludge /
- hematite /
- cement

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参考文献(19)

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