[1]王文康,卜昌盛,熊金琴,等.流化床O2/CO2气氛对烟煤焦反应速率的影响研究王文康,卜昌盛,熊金琴,王昕晔,张居兵,朴桂林,张孝勇[J].南京师范大学学报(工程技术版),2017,17(04):053.[doi:10.3969/j.issn.1672-1292.2017.04.009]
　Wang Wenkang,Bu Changsheng,Xiong Jinqin,et al.Investigation on Reaction Rate of Bituminous Coal-Char Particlesin O2/CO2 Atmosphere in a Fluidized Bed[J].Journal of Nanjing Normal University(Engineering and Technology),2017,17(04):053.[doi:10.3969/j.issn.1672-1292.2017.04.009]
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流化床O2/CO2气氛对烟煤焦反应速率的影响研究王文康1,卜昌盛1,熊金琴1,王昕晔1,张居兵1,朴桂林1,张孝勇2
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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
17卷
期数:
2017年04期
页码:
053
栏目:
能源与机械工程
出版日期:
2017-12-30

文章信息/Info

Title:
Investigation on Reaction Rate of Bituminous Coal-Char Particlesin O2/CO2 Atmosphere in a Fluidized Bed
文章编号:
1672-1292(2017)04-0053-06
作者:
王文康1; 卜昌盛1; 熊金琴1; 王昕晔1; 张居兵1; 朴桂林1; 张孝勇2
(1.南京师范大学能源与机械工程学院,江苏 南京 210042)(2.中国大唐集团科学技术研究院有限公司,北京 102206)
Author(s):
Wang Wenkang1; Bu Changsheng1; Xiong Jinqin1; Wang Xinye1; Zhang Jubing1; Piao Guilin1; Zhang Xiaoyong2
1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China)(2.China Datang Corporation Science and Technology Research Institute,Beijing 102206,China
关键词:
流化床; O2/CO2燃烧; 烟煤; 燃烧; 气化
Keywords:
fluidized Bed; O2/CO2 combustion; bituminous coal; combustion; gasification
分类号:
TQ534.2
DOI:
10.3969/j.issn.1672-1292.2017.04.009
文献标志码:
A
摘要:
流化床O2/CO2燃烧是实现煤炭清洁利用及近零碳排放的有效技术之一. 为进一步探究工业流化床O2/CO2燃烧条件下的煤颗粒燃烧机制,本研究在小型流化床试验台上,通过在线测量流化床出口烟气中O2和CO的浓度,深入考察了O2/CO2取代O2/N2后,不同的床层温度(800～900 ℃)、O2浓度(4%～10%)及颗粒粒径(2～8 mm)下的烟煤焦燃烧特性. 实验结果表明:O2/CO2气氛下,煤焦反应速率随床层温度的升高、O2浓度的升高和颗粒粒径的降低而增加; 煤焦燃烧反应由O2扩散控制,气化反应由反应动力学控制; 相较于O2/N2气氛,低床温下,O2/CO2气氛下的O2扩散速率降低是煤焦反应速率改变的主要原因; 高床温下,除O2/CO2气氛下O2的扩散速率降低外,煤焦气化反应对煤焦反应速率的影响同样不可忽略.
Abstract:
Oxy-fuel fluidized bed(FB)combustion is one of the promising technologies achieving the clean utilization of coal and nearly zero emission of CO2 from coal fired power plants. To obtain the oxy-fuel combustion characteristics of coal particles in the industry FB conditions,experimental study of combustion of bituminous coal particles is conducted in a bench-scale FB in O2/CO2 and O2/N2 atmospheres through continuously measuring the concentrations of O2 and CO in the exit gas at the bed temperatures of 800～900 ℃,the O2 concentrations of 4%～10% and the coal particle sizes of 2-8 mm. Results indicate that the combustion rate of bituminous coal-char particle increases with the increase of bed temperature,O2 concentration and the decrease of the coal-char size in O2/CO2 atmosphere. Oxidation of coal-char is controlled by the diffusion of O2,whereas gasification of coal-char is limited by the reaction kinetics. Compared with coal-char combustion in the O2/N2 atmosphere,the decreased diffusivity of O2 in CO2 is the main reason for the changed reaction rate of coal-char particle in O2/CO2 atmosphere at a low bed temperature. However,at a high bed temperature,in spite of the low diffusion rate of O2,the effect of gasification on the coal-char reaction could not be ignored as consequence of the increased gasification rate.

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　Yan Minjie.On Emerging and Efficient Depainting Technology in Fluidized Bed Incinerator[J].Journal of Nanjing Normal University(Engineering and Technology),2012,12(04):082.

备注/Memo

备注/Memo:
收稿日期:2017-06-08.
基金项目:国家自然科学基金青年基金(51606104)、江苏省高校自然科学研究面上项目(16KJB470010)、中国博士后科学基金面上项目(2016M591879)、安徽省科技重大专项计划(15czz02045).
通讯联系人:卜昌盛,博士,讲师,研究方向:煤燃烧与气化. E-mail:csbu@njnu.edu.cn
更新日期/Last Update: 2017-12-30