U-GAS气化炉高碳飞灰燃烧特性
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摘要
采用热天平研究了U-GAS气化炉高碳飞灰燃烧特性,考察了灰分以及不同升温速率对飞灰燃烧特性的影响,探讨了飞灰造粒后应用于流化床锅炉燃烧的可行性.结果表明:与入炉煤粉相比,飞灰着火温度高、燃尽时间长、反应性较差;飞灰中灰分对飞灰燃烧性能和反应性能产生不利影响;随着升温速率增大,飞灰着火温度及燃尽温度升高,燃尽时间缩短,反应性增强;造粒后飞灰颗粒着火温度、燃尽温度均与煤粉接近,且它们的燃烧温度区域基本重合,颗粒可用于流化床锅炉燃烧.
Thermogravimetric analyzer was employed to investigate the combustion properties of high-carbon fly ash derived from U-GAS gasifier.The influence of ashes and different heating rates on combustion characteristics were researched.In addition,the combustion feasibility of granular fly ash in a fluidized bed boiler was discussed.The results indicate that fly ash has a higher ignition temperature,a longer burning time,and a lower reactivity than its corresponding pulverized coal;the ashes of fly ash have a negative influence on combustion properties and combustion reactivity.With the increase of heating rate,the ignition and burnout temperature are increased,the burnout time are shortened and the combustion reactivity are enhanced;the ignition and burnout temperature of granular fly ash are close to those of pulverized coal.In addition,the combustion temperature areas of granular fly ash and pulverized coal are basically coincident,therefore,granular fly ash can be burned in a fluidized-bed boiler.
Thermogravimetric analyzer was employed to investigate the combustion properties of high-carbon fly ash derived from U-GAS gasifier.The influence of ashes and different heating rates on combustion characteristics were researched.In addition,the combustion feasibility of granular fly ash in a fluidized bed boiler was discussed.The results indicate that fly ash has a higher ignition temperature,a longer burning time,and a lower reactivity than its corresponding pulverized coal;the ashes of fly ash have a negative influence on combustion properties and combustion reactivity.With the increase of heating rate,the ignition and burnout temperature are increased,the burnout time are shortened and the combustion reactivity are enhanced;the ignition and burnout temperature of granular fly ash are close to those of pulverized coal.In addition,the combustion temperature areas of granular fly ash and pulverized coal are basically coincident,therefore,granular fly ash can be burned in a fluidized-bed boiler.
引文
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[17]罗海华,张世红,陈汉平,等.循环流化床锅炉飞灰残碳燃烧特性的实验研究[J].煤炭转化,2008,31(1):61-65.Luo Haihua,Zhang Shihong,Chen Hanping,et al.Experimental research on combustion characteristics of residual carbon of fly ash from CFB boiler[J].Coal Conversion,2008,31(1):61-65(in Chinese).
[18]鲜晓红,杜云贵,张光辉.TG-DTG/DTA研究混煤的燃烧特性[J].煤炭转化,2011,34(3):67-70.Xian Xiaohong,Du Yungui,Zhang Guanghui.Combustion characteristics of coal blending by TG-DTG/DTA[J].Coal Conversion,2011,34(3):67-70(in Chinese).
[19]原永涛,杨倩,齐立强.循环流化床锅炉飞灰特性研究[J].锅炉技术,2006,37(3):29-32.Yuan Yongtao,Yang Qian,Qi Liqiang.Study on the characteristics of fly ash from CFB[J].Boiler Technology,2006,37(3):29-32(in Chinese).
[2]董文博.U-GAS粉煤气化技术[J].广州化工,2013,41(22):155-157.Dong Wenbo.U-GAS pulverized coal gasification technology[J].Guangzhou Chemical Industry,2013,41(22):155-157(in Chinese).
[3]Sua-iam G,Makul N.Utilization of high volumes of unprocessed lignite-coal fly ash and rice husk ash in selfconsolidating concrete[J].Journal of Cleaner Production,2014,78(9):184-194.
[4]Aysen Lav M,Hilmi Lav A.Effects of stabilization on resilient characteristics of fly ash as pavement material[J].Construction and Building Materials,2014,54(3):10-16.
[5]Mishra D P,Das S K.A study of physico-chemical and mineralogical properties of Talcher coal fly ash for stowing in underground coal mines[J].Materials Characterization,2010,61(11):1252-1259.
[6]Shaheen S M,Hooda P S,Tsadilas C D.Opportunities and challenges in the use of coal fly ash for soil improvements:A review[J].Journal of Environmental Management,2014,145(12):249-267.
[7]陈彦广,陆佳,韩洪晶,等.粉煤灰作为廉价吸附剂控制污染物排放的研究进展[J].化工进展,2013,32(8):1905-1913.Chen Yanguang,Lu Jia,Han Hongjing,et al.Research development of controlling air pollutions using fly ash as a low cost adsorbent[J].Chemical Industry and Engineering Progess,2013,32(8):1905-1913(in Chinese).
[8]欧阳平,范洪勇.基于吸附的粉煤灰改性利用研究进展[J].现代化工,2014,34(3):25-28.Ouyang Ping,Fan Hongyong.Research progress in modification utilization of fly ash based on adsorption[J].Modern Chemical Industry,2014,34(3):25-28(in Chinese).
[9]于军华,邱化慧,衣华.气力输送在锅炉飞灰回燃技术中的应用[J].中国粉体技术,2010,16(3):85-86.Yu Junhua,Qiu Huahui,Yi Hua.Application of pneumatic conveying in fly ash backflash of boilers[J].China Powder Science and Technology,2010,16(3):85-86(in Chinese).
[10]段伦博,李艳敏,刘道银,等.循环流化床锅炉掺烧煤泥飞灰底饲回燃试验[J].煤炭学报,2010,35(9):1537-1541.Duan Lunbo,Li Yanmin,Liu Daoyin,et al.Experimental on fly ash recirculation with bottom feeding in a circulating fluidized bed boiler co-burning coal sludge[J].Journal of China Coal Society,2010,35(9):1537-1541(in Chinese).
[11]李社锋,方梦祥,余斌,等.循环流化床锅炉飞灰的回燃特性[J].燃烧科学与技术,2010,16(3):230-235.Li Shefeng,Fang Mengxiang,Yu Bin,et al.Characteristics of fly ash recycle to reburn in circulating fluidized bed boilers[J].Journal of Combustion Science and Technology,2010,16(3):230-235(in Chinese).
[12]梅琳,卢啸风,王泉海,等.飞灰流化床燃烧脱碳的试验研究[J].中国电机工程学报,2014,34(26):4454-4461.Mei Lin,Lu Xiaofeng,Wang Quanhai,et al.Experimental study of fly ash decarbonization on a circulation fluidized bed combustor[J].Proceedings of the CSEE,2014,34(26):4454-4461(in Chinese).
[13]于广辉,路霁鸰,郭庆杰,等.循环流化床锅炉飞灰残碳生成机理研究[J].煤炭转化,2000,23(3):19-25.Yu Guanghui,Lu Jiling,Guo Qingjie,et al.Generation mechanism of residual carbon in fly ash of CFB boiler[J].Coal Conversion,2000,23(3):19-25(in Chinese).
[14]方立军,于澜.富氧环境下煤粒燃烧特性的热重实验[J].燃烧科学与技术,2014,20(4):297-302.Fang Lijun,Yu Lan.Thermo-gravimetric experiment on combustion performance of coal particle in oxygenenriched environments[J].Journal of Combustion Science and Technology,2014,20(4):297-302(in Chinese).
[15]晏建波,王海蓉,梁栋,等.油页岩掺混煤的燃烧性能与排放性能[J].燃烧科学与技术,2014,20(2):158-163.Yan Jianbo,Wang Hairong,Liang Dong,et al.Combustion and emission performance of oil shale mixed with coal[J].Journal of Combustion Science and Technology,2014,20(2):158-163(in Chanese).
[16]景旭亮,王志青,张乾,等.流化床气化炉半焦细粉的燃烧特性及其动力学研究[J].燃料化学学报,2014,42(1):13-19.Jing Xuliang,Wang Zhiqing,Zhang Qian,et al.Combustion property and kinetics of fine chars derived from fluidized bed gasifier[J].Journal of Fuel Chemistry and Technology,2014,42(1):13-19(in Chinese).
[17]罗海华,张世红,陈汉平,等.循环流化床锅炉飞灰残碳燃烧特性的实验研究[J].煤炭转化,2008,31(1):61-65.Luo Haihua,Zhang Shihong,Chen Hanping,et al.Experimental research on combustion characteristics of residual carbon of fly ash from CFB boiler[J].Coal Conversion,2008,31(1):61-65(in Chinese).
[18]鲜晓红,杜云贵,张光辉.TG-DTG/DTA研究混煤的燃烧特性[J].煤炭转化,2011,34(3):67-70.Xian Xiaohong,Du Yungui,Zhang Guanghui.Combustion characteristics of coal blending by TG-DTG/DTA[J].Coal Conversion,2011,34(3):67-70(in Chinese).
[19]原永涛,杨倩,齐立强.循环流化床锅炉飞灰特性研究[J].锅炉技术,2006,37(3):29-32.Yuan Yongtao,Yang Qian,Qi Liqiang.Study on the characteristics of fly ash from CFB[J].Boiler Technology,2006,37(3):29-32(in Chinese).
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