Simulation study of internally heat-integrated distillation column and its characteristics for energy saving

ZHAO Xiong; LUO Yiqing; YAN Binghai; YUAN Xigang

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Simulation study of internally heat-integrated distillation column and its characteristics for energy saving

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- Simulation study of internally heat-integrated distillation column and its characteristics for energy saving
- CIESC Journal Issue 1, Pages: 142-150(2009)
- 作者机构：
  
  化学工程联合国家重点实验室（天津大学），天津大学化学工程研究所
- 作者简介：
- 基金信息：
- DOI：
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- Online First：05 January 2009，
  
  Published：05 January 2009
- 稿件说明：
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ZHAO Xiong, LUO Yiqing, YAN Binghai, et al. Simulation study of internally heat-integrated distillation column and its characteristics for energy saving[J]. CIESC Journal, 2009, (1): 142-150.
DOI：

ZHAO Xiong, LUO Yiqing, YAN Binghai, et al. Simulation study of internally heat-integrated distillation column and its characteristics for energy saving[J]. CIESC Journal, 2009, (1): 142-150. DOI：

摘要

针对苯-甲苯和丙烯-丙烷物系，模拟分析了压缩比、进料状态及换热量分布方式对理想内部能量集成精馏塔的操作特性、所需塔内换热面积及节能效果的影响。将模拟结果与传统精馏塔及热泵精馏塔进行比较，结果显示内部能量集成精馏塔的节能效果对于不同物系有较大差别。对苯-甲苯物系，热泵精馏塔的节能效果最好，节能百分率为40％。对丙烯-丙烷物系，理想内部能量集成精馏塔的节能优势明显，节能百分率在60％～80％。本文提出了内部能量集成精馏塔热温匹配的换热量分布方式。模拟结果表明，达到同样节能效果，采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。

Abstract

Static characteristics of internally heat-integrated distillation column (HIDiC) separating binary mixtures of benzene-toluene and of propylene-propane under different compression ratios

feed thermal conditions and distribution modes of heat duty were investigated through simulation studies

and comparative studies against conventional distillation columns (CDIC) and heat pump assisted distillation column (VRC) were also performed to evaluate the energy-saving effect of HIDiC.The simulation results demonstrated that the ideal HIDiC held its superiority in energy efficiency only for the separation of binary close-boiling mixtures.The results obtained showed that the energy-saving effect of VRC was the best for benzene-toluene

with the value of 40% compared with the CDIC

and in the case of propylene-propane system，the HIDiC provided the best energy-saving effect of 60%—80%.The paper proposes a more reasonable heat duty distribution mode called temperature and heat duty matching (THM) for HIDiC.Compared with the mode of averaged heat duty (AH)

the heat transfer area in HIDiC can be reduced significantly at a relative small compression ratio using THM.

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