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过程工程学报 ›› 2017, Vol. 17 ›› Issue (3): 551-557.DOI: 10.12034/j.issn.1009-606X.216309CSTR: 32067.14.jproeng.216309

• 过程与工艺 • 上一篇    下一篇

玉米秸秆与煤流化床的共气化特性

曾曦1,敖先权2,曹阳3,杨爱江1   

  1. 1. 贵州大学资源与环境工程学院
    2. 贵州省贵阳市贵州大学蔡家关校区化学工程学院
    3. 贵州大学 化学与化工学院
  • 收稿日期:2016-09-25 修回日期:2016-11-18 出版日期:2017-06-20 发布日期:2017-06-14
  • 通讯作者: 杨爱江 yangaij8818@sina.com
  • 基金资助:
    贵州省科技厅重大应用基础研究项目;贵州省科技厅重大专项资助项目;教育部春晖计划资助项目

Effect of Air Vapor on Co-gasification of Corn Stalks and Coal in Fluidized-bed

Xi ZENG1,  Xianquan AO2,  Yang CAO2.3,  Aijiang YANG1,3*   

  1. 1. School of Resources and Environment Engineering, Guizhou University, Guiyang, Guizhou 550025, China;
    2. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, China;
    3. Institute of Environmental Engineerting Planing and Design, Guizhou University, Guiyang, Guizhou 550025, China
  • Received:2016-09-25 Revised:2016-11-18 Online:2017-06-20 Published:2017-06-14

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被引次数

3

摘要： 以玉米秸秆与无烟煤为原料，在循环流化床中进行空气-水蒸汽气化试验，采用预热装置将气化剂（空气、水蒸汽）由常温加热至500 ℃，研究了不同气化温度、气化剂类型及生物质掺混比例对气化燃气组分和热值、气化效率及碳转化率等评价指标的影响。结果表明：提高气化温度能增大碳转化率及气化效率，在800～1000℃范围内，无烟煤单独气化950 ℃时气化效率最高，掺混比（m玉米秸秆：m煤）20%的混合试样850 ℃时气化效率最高；选择空气-水蒸汽气化剂时，H2体积分数由1.80%增加到15.53%；随着玉米秸秆掺混比增加，促进了CO的生成，抑制了CO2的生成，但掺混比例大于40%时会降低燃气热值及碳转化率。使用空气作气化剂，掺混比20%时燃气热值最高，选择空气-水蒸汽作气化剂时，掺混比40%时燃气热值最高。

关键词: 共气化, 流化床, 玉米秸秆, 无烟煤, 空气-水蒸汽

Abstract: In order to study the influence of gasification temperature, gasification agents and blending ratios on gas component, low heat value (LHV), gasification efficiency and carbon conversion rate during co-gasification in a circulating fluidized bed, experimental tests were carried out with air vapor of room temperature heated to 500 ℃. Results show that the rise in gasification temperature can promote the carbon conversion rate and the gasification efficiency. The highest gasification efficiency of anthracite gasification alone is at 950 ℃ between the range of 800～1000 ℃, and the highest gasification efficiency of corn stalks sample of 20% blending ratio is at 850 ℃. With air vapor being the gasification agents, H2 increased from 1.80% to 15.53%. The addition of corn stalk promoted the generation of CO while inhibited the generation of CO2. But LHV, carbon conversion rate and gasification efficiency decreased when blending ratio exceeds 40%. With air being the gasification agent, the highest LHV appeared at 20% blending ratio, and with air vapor as the gasification agent, the highest LHV appeared when the blending ratio was 40%.

Key words: co-gasification, fluidized bed, corn stalks, anthracite, air vapor