A pilot scale study on co-capture of SO2 and NOx in O2/CO2 recycled coal combustion and techno-economic evaluation

被引:5
作者
Zou Chun [1 ]
Huang ZhiJun [1 ]
Xiong Jie [1 ]
Guo Peng [1 ]
Zheng ChuGuang [1 ]
机构
[1] Huazhong Univ Sci & Technol, Stated Key Lab Coal Combust, Wuhan 30074, Peoples R China
基金
中国国家自然科学基金;
关键词
O-2/CO2; Oxyfuel; coal combustion; desulphurization; denitration; OXY-FUEL COMBUSTION; MIXTURES; AIR; REDUCTION; EMISSIONS;
D O I
10.1007/s11431-009-0417-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents the study on co-capture of SO2 and NOx in O-2/CO2 recycled coal combustion in a pilot scale facility with the heat input of 0.3 MW by using high-sulphur lean coal. Detailed comparison of SO2 and NOx emission indexes and desulphurization and denitration rates have been made among three working conditions of O-2/CO2, O-2/CO2 with limestone injection (O-2/CO2+Ca) and O-2/RFG (recycled flue gas) with limestone injection (O-2/RFG+Ca). Combustion in air was performed as a base case. Results showed that in the O-2/RFG with limestone injection, desulphurization and denitration rates could reach up to 96% and 89%, respectively. Limestone injection under the high-CO2 atmosphere caused a significant reduction on SO2 emission and NOx emission as well. This indicated O-2/CO2 recycled coal combustion could reduce the investment on the flue gas purification. The techno-economic evaluation indicated that Oxy-combustion technique is not only feasible for CO2 emission control based on existing power plants but is also cost-effective.
引用
收藏
页码:155 / 159
页数:5
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