Energy Evaluation for Lignite Pyrolysis by Solid Heat Carrier Coupled with Gasification
Energy Evaluation for Lignite Pyrolysis by Solid Heat Carrier Coupled with Gasification
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DOI：
10.1021/ef400865h
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发表时间：
2013-07
期刊：
影响因子：
5.3
通讯作者：
Qun Yi;Jie Feng;Bingchuan Lu;J. Deng;Chang-Liu Yu;Wenying Li
中科院分区：
文献类型：
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作者：
Qun Yi;Jie Feng;Bingchuan Lu;J. Deng;Chang-Liu Yu;Wenying Li
为了清洁高效地利用褐煤，本研究提出了一种固体热载体耦合气化的褐煤热解能源系统。基于实验数据，利用Aspen Plus 11.1对该过程进行了模拟和分析。揭示了系统的能耗分布以及固体热载体与褐煤的质量比这两个最重要的技术参数。气化炉的选择对系统的能源效率影响最大。结果表明，在褐煤处理量为41.7吨/小时的情况下，焦油和煤气化气的产量分别为1.6吨/小时和25.7吨/小时，17%的半焦燃烧为系统提供能量，其余的用于气化炉。此外，褐煤中的表面水分和焦油中的酚水可在耦合过程中用作气化剂，可节省多达8.9吨/小时的水，并使酚水的处理量减少2.7吨/小时，从而……
In order to utilize lignite in a clean and highly efficient way, an energy system for lignite pyrolysis by solid heat carrier coupled gasification is proposed in this study. The process is simulated and analyzed by Aspen Plus 11.1 on the basis of experimental data. The energy consumption distribution of the system and the mass ratio of the solid heat carrier to lignite, the most important technological parameters, are revealed. The choice of gasifier has the greatest impact on the energy efficiency of the system. Results show that, with a lignite handling capacity of 41.7 t·h–1, the yields of tar and coal gasified gas are 1.6 and 25.7 t·h–1, respectively, and 17% of the char is burnt to supply energy for the system while the remainder is used in the gasifier. Also, the surface moisture present in lignite and the phenol water from the tar can be utilized as the gasification agent in the coupled process, saving up to 8.9 t·h–1 water and decreasing the handling capacity of phenol water by 2.7 t·h–1, thereby ...