Coal combustion characteristics on an oxy-fuel circulating fluidized bed combustor with warm flue gas recycle

被引：123

作者：

Duan, Lunbo ^{[1
]}

Sun, Haicheng ^{[1
]}

Zhao, Changsui ^{[1
]}

Zhou, Wu ^{[1
]}

Chen, Xiaoping ^{[1
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China

来源：

FUEL | 2014年 / 127卷

基金：

中国国家自然科学基金;

关键词：

Oxy-fuel; CFB; Warm flue gas recycle; SO2; emission; NO emission; TECHNOLOGY; EMISSIONS; STATE;

D O I：

10.1016/j.fuel.2013.06.016

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

More than 100-h steady warm flue gas recycle operation was carried out on a 50 kW(th) oxy-fuel circulating fluidized bed (CFB) combustor burning three kinds of fuel. The results demonstrate the good safety benefit of oxy-CFB operation, especially in the oxy-transition process. A slightly higher oxygen concentration, ranging from 22.2% to 23.4% for different fuels in oxy-fuel operation, can bring equivalent or higher carbon burnout than air combustion. SO2 concentration in ppm unit is higher in flue gas while the SO2 emission in mg/MJ unit is lower than air combustion. The desulfurization efficiency of limestone can reach 80% in oxy-fuel combustion in this test. The higher Ca utilization rate burning coal in oxy-fuel combustion than that in air combustion may be associated with the high moisture content in the flue gas. Fuel nitrogen conversion ratio in oxy-fuel is much lower than in air combustion, and it looks like higher volatile content in fuel leads to a bigger reduction of NO in the recycle flue gas. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：47 / 51

页数：5

共 18 条

[1] Sulfur trioxide formation during oxy-coal combustion [J].

Ahn, Jiyoung ;

Okerlund, Ryan ;

Fry, Andrew ;

Eddings, Eric G. .

INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2011, 5 :S127-S135

[2] Oxy-fuel combustion technology for coal-fired power generation [J].

Buhre, BJP ;

Elliott, LK ;

Sheng, CD ;

Gupta, RP ;

Wall, TF .

PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 2005, 31 (04) :283-307

[3]

DUAN L, 2013, APPL ENERGY

[4] Sulfur fate during bituminous coal combustion in an oxy-fired circulating fluidized bed combustor [J].

Duan, Lunbo ;

Zhou, Wu ;

Li, Haixin ;

Chen, Xiaoping ;

Zhao, Changsui .

KOREAN JOURNAL OF CHEMICAL ENGINEERING, 2011, 28 (09) :1952-1955

[5] O2/CO2 coal combustion characteristics in a 50 kWth circulating fluidized bed [J].

Duan, Lunbo ;

Zhao, Changsui ;

Zhou, Wu ;

Qu, Chengrui ;

Chen, Xiaoping .

INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2011, 5 (04) :770-776

[6] Effects of operation parameters on NO emission in an oxy-fired CFB combustor [J].

Duan, Lunbo ;

Zhao, Changsui ;

Zhou, Wu ;

Qu, Chengrui ;

Chen, Xiaoping .

FUEL PROCESSING TECHNOLOGY, 2011, 92 (03) :379-384

[7]

HACK H, 2009, CLEARW CLEAN COAL C

[8] Emissions of SO2 and NOx during Oxy-Fuel CFB Combustion Tests in a Mini-Circulating Fluidized Bed Combustion Reactor [J].

Jia, L. ;

Tan, Y. ;

Anthony, E. J. .

ENERGY & FUELS, 2010, 24 (02) :910-915

[9]

JIANG Z, 2013, ENERGY FUELS

[10]

LAWRENCE E, 2009, CLEARW CLEAN COAL C

← 1 2 →