温度对天然焦蒸汽气化特性的影响  

Influence of temperature on natural coke-steam gasification characteristics

作　　者：向文国[1] 赵长遂[1] 庞克亮 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]国家电站燃烧工程技术研究中心,沈阳110034

出　　处：《东南大学学报（自然科学版）》2009年第5期992-997,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(90410009;50776018);国家重点基础研究发展计划(973计划)资助项目(2007CB210101)

摘　　要：在小型流化床实验装置(50mm、高1.6m)上,考察了温度对沛城煤矿天然焦蒸汽气化产气量、碳转化率、煤气热值和煤气组分的影响,并与ASPENPLUS模拟结果进行了对比.实验结果表明:反应温度是影响气化反应的主要因素,温度升高,煤气组分中H2和CO2含量下降,CO含量增加;当气化反应温度从850℃提高到1000℃,碳转化率从10.25%提高到47.76%,产气量增加了4.3倍;H2和CO2的含量由63.0%和25.0%减少到59.8%和20.2%,CO含量由9.6%增加到18.5%;煤气热值从8.87MJ/m3增加到了9.33MJ/m3.应用ASPENPLUS软件模拟天然焦-蒸汽气化反应过程,同时考虑碳转化率,其模拟结果与实验数据接近,误差在可接受范围内,因此ASPENPLUS模拟对系统设计与优化具有参考意义.Steam gasification characteristic of Peicheng natural coke is studied in a bench-scale fluidized bed （ Ф50 mm, 1.6 m）. Effects of the operation temperature on the gas yield, carbon conversion, heating value and gas components are discussed. Experimental results are also compared with those of ASPEN PLUS simulation. Experimental results show that gasification temperature is a key parameter. As the temperature goes up, the contents of H2 and CO2 in the product gas decline while the content of CO increases. As the gasification temperature rises from 850℃ to 1 000℃, the volume fractions of H2, CO, and CO2 in the product gas change from 63.0%, 25.0%, and 9.6% to 59.8%, 20. 2%, and 18.5% respectively. Product gas yield increases by 4. 3 times and carbon conversion rate gets increased from 10. 25% to 47.76%, and the gas heating value increases from 8.87 to 9. 33 MJ/m^3. The ASPEN PLUS simulation results accord well with the experimental data when the carbon conversion rate is selected according to the experimental results.

关 键 词：天然焦 流化床 模拟 蒸汽气化 煤气 

分 类 号：TQ517[化学工程]