Experimental tests on co-firing coal and biomass waste fuels in a fluidised bed under oxy-fuel combustion

被引:63
作者
Liu, Qinwen [1 ,2 ]
Zhong, Wenqi [1 ,2 ]
Tang, Rui [1 ]
Yu, Hongqian [1 ]
Gu, Jinrao [1 ,2 ]
Zhou, Guanwen [1 ,2 ]
Yu, Aibing [1 ,2 ,3 ]
机构
[1] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Peoples R China
[2] Southeast Univ, Monash Univ Joint Res Inst, Ctr Simulat & Modelling Particulate Syst, Suzhou 215000, Peoples R China
[3] Monash Univ, Dept Chem Engn, ARC Res Hub Computat Particle Technol, Clayton, Vic 3800, Australia
基金
中国国家自然科学基金; 澳大利亚研究理事会;
关键词
Oxy-fuel combustion; Co-firing of coal and biomass; Oxy-fuel fluidised bed; CO2; capture;
D O I
10.1016/j.fuel.2020.119312
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
The co-firing of coal and biomass waste in oxy-fuel fluidised beds is an important oxy-fuel combustion technology for CO2 capture and waste disposal. However, practical experience regarding co-firing in an oxy-fuel fluidised bed is still limited. In this study, a 10 kWth oxy-fuel fluidised bed with continuous fuel-feeding and real-time flue gas measurements was developed. The combustion stability and dynamic response during the switch in combustion states were examined. The effect of the combustion atmosphere (air or oxy-fuel combustion), inlet O-2 concentration (V(0)o(2)), combustion temperature, fuel type, and biomass blending mass ratio (Mb) on the combustor temperature distribution, CO2 enrichment, carbon conversion, and combustion residues were systematically investigated. The results indicated that the combustion state can switch quickly during the cofiring process (similar to the rapid switch in combustion states during oxy-coal or oxy-biomass combustion), and stable combustion in the fluidised bed can be maintained when V(0)o(2) is increased to 30% or more. The optimal range of Mb, which is directly related to the fuel type and combustion mode, contributes to a highly uniform temperature distribution, increased CO2 generation, and decreased amount of unburnt carbon in the fly ash. The bottom slag had a honeycomb structure, which became larger than quartz sand (bed material) after 120 h of combustion. Furthermore, no agglomeration of bottom slag, quartz sand, and fly ash was detected during the tests.
引用
收藏
页数:14
相关论文
共 81 条
[61]   Scale-up challenges and opportunities for carbon capture by oxy-fuel circulating fluidized beds [J].
Seddighi, Sadegh ;
Clough, Peter T. ;
Anthony, Edward J. ;
Hughes, Robin W. ;
Lu, Ping .
APPLIED ENERGY, 2018, 232 :527-542
[62]   Oxy-fuel combustion study of biomass fuels in a 20 kWth fluidized bed combustor [J].
Sher, Farooq ;
Pans, Miguel A. ;
Sun, Chenggong ;
Snape, Colin ;
Liu, Hao .
FUEL, 2018, 215 :778-786
[63]   Energy efficiency analysis of pressurized oxy-coal combustion system utilizing circulating fluidized bed [J].
Shi, Yan ;
Zhong, Wenqi ;
Shao, Yingjuan ;
Liu, Xuejiao .
APPLIED THERMAL ENGINEERING, 2019, 150 :1104-1115
[64]   Current status and experimental investigation of oxy-fired fluidized bed [J].
Singh, Ravi Inder ;
Kumar, Rajesh .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2016, 61 :398-420
[65]   Oxyfuel combustion for CO2 capture in power plants [J].
Stanger, Rohan ;
Wall, Terry ;
Spoerl, Reinhold ;
Paneru, Manoj ;
Grathwohl, Simon ;
Weidmann, Max ;
Schefflmecht, Guenter ;
McDonald, Denny ;
Myohanen, Kari ;
Ritvanen, Jouni ;
Rahiala, Sirpa ;
Hyppanen, Timo ;
Mletzko, Jan ;
Kather, Alfons ;
Santos, Stanley .
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2015, 40 :55-125
[66]   Oxy-fuel co-combustion of sewage sludge and wood pellets with flue gas recirculation in a circulating fluidized bed [J].
Sung, Jin-Ho ;
Back, Seung-Ki ;
Jeong, Bup-Mook ;
Kim, Jeong-Hun ;
Choi, Hang Seok ;
Jang, Ha-Na ;
Seo, Yong-Chil .
FUEL PROCESSING TECHNOLOGY, 2018, 172 :79-85
[67]   Experiences and results on a 0.8 MWth oxy-fuel operation pilot-scale circulating fluidized bed [J].
Tan, Y. ;
Jia, L. ;
Wu, Y. ;
Anthony, E. J. .
APPLIED ENERGY, 2012, 92 :343-347
[68]   Some Combustion Characteristics of Biomass and Coal Cofiring under Oxy-Fuel Conditions in a Pilot-Scale Circulating Fluidized Combustor [J].
Tan, Yewen ;
Jia, Lufei ;
Wu, Yinghai .
ENERGY & FUELS, 2013, 27 (11) :7000-7007
[69]   Emissions from co-firing lignite and biomass in an oxy-fired CFBC [J].
Varol, Murat ;
Symonds, Robert ;
Anthony, E. J. ;
Lu, Dennis ;
Jia, Lufei ;
Tan, Yewen .
FUEL PROCESSING TECHNOLOGY, 2018, 173 :126-133
[70]   A critical review on additives to reduce ash related operation problems in biomass combustion applications [J].
Wang, Liang ;
Hustad, Johan E. ;
Skreiberg, Oyvind ;
Skjevrak, Geir ;
Gronli, Morten .
TECHNOPORT 2012 - SHARING POSSIBILITIES AND 2ND RENEWABLE ENERGY RESEARCH CONFERENCE (RERC2012), 2012, 20 :20-29