化工进展2018，Vol.37Issue(1)：7-13,7.DOI:10.16085/j.issn.1000-6613.2017-0452
内部热耦合精馏塔的传热及优化
Investigation on heat transfer and optimization of internally heat-integrated distillation column
李春利 1杜季颖 2张林 1李晓春1
作者信息
- 1. 河北工业大学化工学院,天津 300130
- 2. 河北工业大学化工节能过程集成与资源利用国家地方联合实验室,天津300130
- 折叠
摘要
Abstract
In order to research the heat transfer rate and heat transfer coefficient of concentric internally heat-integrated distillation column(HIDiC)at different compression ratios,the experimental study was carried out in the self-made pilot plant with ethanol-water as the separation system. The heat transfer model of concentric HIDiC was built by replacing the plates with flash tanks. The heat transfer rate between the rectifying and stripping section was calculated by the enthalpy difference of the flow inlet and outlet of the flash tank,and the heat transfer coefficient was got by dividing region. The annual total cost(TAC)was used as an optimized index to study the number of external heat exchangers required to realize the zero external return. The results showed that when the compression ratio was 2.2,the heat transfer rate reached to the maximum,the duty of condenser and reboiler reached to the minimum,and the relationship between the compression ratio and heat transfer coefficient was negative. The number of external heat exchangers decreased and TAC began to drop with the increase of the minimum heat transfer temperature difference. TAC reached to the minimum by adding one heat exchanger between the first plate of rectifying and stripping section.关键词
内部热耦合精馏塔/压缩比/传热模型/传热系数/优化设计Key words
internally heat-integrated distillation column/compression ratio/heat transfer model/heat transfer coefficient/optimal design分类
化学化工引用本文复制引用
李春利,杜季颖,张林,李晓春..内部热耦合精馏塔的传热及优化[J].化工进展,2018,37(1):7-13,7.
