摘要
在使用Aspen Plus对激冷型气流床煤气化系统进行模拟和优化的基础上,采用热力学分析方法,对气化系统进行了能量衡算和量衡算。计算结果表明,系统中损失最大的过程是化学能转变为物理能的过程。洗涤冷却室是损失最大的设备,损失占了总的21.2%;其次是气化炉气化室,占到了总的13.9%,气化室的损失主要发生在水的汽化等过程中,这一部分损失占气化过程损失的70%左右,而氧气加热至反应温度所带来的损失仅占30%左右。采用分析方法可以更准确地揭示系统中损失最大的环节和过程,为改进设备、节约能源提供目标和对策。
Based on the simulation and optimization results of quenching entrained-flow coal gasification process with Aspen Plus, thermodynamic analysis was applied to calculate energy distribution and exergy distribution of the gasification system. The results show that the process with the maximal exergy loss is chemical energy transforming into physical energy. The equipment with the maximum exergy loss is scrubbing-cooling chamber, sharing 21.2% of total input exergy; the second is gasifier, with exergy loss sharing 13.9%, and 70% of exergy loss in gasifier root in vaporization of water, the temperature rise of oxygen result in the other 30%. By using exergy analysis method, it can be more accurate and convenient to uncover the process with the maximal exergy loss so as to set up target and provide suggestion of equipment rebuilding and energy saving.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2007年第2期75-78,共4页
Chemical Engineering(China)
基金
国家重点基础研究发展计划资助项目(2004CB217707)
国家高技术研究发展计划资助项目(2003AA521020)
上海市青年科技启明星计划资助项目(03QF14013)
关键词
气流床煤气化
能分析
[火用]分析
entrained-flow gasification
energy analysis
exergy analysis