Design and optimization of refrigeration separation system for variable-temperature cooling process in ethylene cryogenic separation process

XIE Na; LIU Jinping; XU Xiongwen; CAO Le

doi:10.3969/j.issn.0438-1157.2013.10.014

您当前的位置：

首页 >

文章列表页 >

Design and optimization of refrigeration separation system for variable-temperature cooling process in ethylene cryogenic separation process

更新时间：2025-12-10

- Design and optimization of refrigeration separation system for variable-temperature cooling process in ethylene cryogenic separation process
- CIESC Journal Issue 10, Pages: 3590-3598(2013)
- 作者机构：
  
  华南理工大学电力学院,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.10.014
  CLC： Q083.4
- Online First：05 October 2013，
  
  Published：05 October 2013
- 稿件说明：
移动端阅览
XIE Na, LIU Jinping, XU Xiongwen, et al. Design and optimization of refrigeration separation system for variable-temperature cooling process in ethylene cryogenic separation process[J]. CIESC Journal, 2013, (10): 3590-3598.
DOI：

XIE Na, LIU Jinping, XU Xiongwen, et al. Design and optimization of refrigeration separation system for variable-temperature cooling process in ethylene cryogenic separation process[J]. CIESC Journal, 2013, (10): 3590-3598. DOI： 10.3969/j.issn.0438-1157.2013.10.014.

摘要

根据乙烯装置中的用冷需求

将乙烯装置的深冷分离过程分为变温冷却过程和定温冷凝过程

变温冷却过程指的是裂解气的预冷过程

定温冷凝过程指的是乙烯装置中各塔塔顶冷凝器中的换热;分析了乙烯-丙烯复叠制冷系统的换热集成曲线

可知在裂解气的预冷阶段

冷热物流换热温差大。提出一种组合制冷系统

它集成了纯工质复叠制冷和混合冷剂制冷

其中的多元混合冷剂制冷系统为乙烯深冷分离的变温换热过程提供冷量。并用Aspen Plus软件对混合冷剂系统进行建模

使用遗传算法优化

优化结果表明在替代原制冷系统6895.5 kW冷量负荷的情况下

功耗降低521.6 kW

节能14.7%。

Abstract

According to the cooling demand of the ethylene plant

cracking gas cooling-separation process is divided into a variable-temperature cooling process and a constant-temperature cooling process

corresponding to the precooling process of cracking gas and the overhead condenser of towers in the ethylene plant

respectively.In this study

the heat exchange composite curve of the original refrigeration system(ethylene-propylene cascade refrigeration systems)was obtained

indicating that the heat exchange temperature difference between cold and hot streams is massive in precooling process of cracking gas.The heat exchange losses can be reduced by a suitable mixed refrigerant system.Furthermore

a combining multiple mixed refrigerant and cascade refrigeration system was proposed.The combinatorial refrigeration system model was set up with Aspen Plus.And genetic algorithm was adopted as the optimization method

with system variables such as refrigerant components

outlet pressure of compressor

and pressure in outlet of the throttle.Eventually

the compression power in the optimal solution was 3025.5 kW

which was 14.7% lower than that in the pure refrigerant systems.

关键词

Keywords

references

Views

387

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical studies about intermediate purification of using hydrogen peroxide to produce hydrazine hydrate

ANN-GA integrated framework for intelligent screening of ORC mixture working fluids and performance optimization

Modeling and optimization of rectisol process based on self-heat regeneration

Advances in machine learning-based materials research for MOFs: energy gas adsorption separation

Establishment and simulation of hydrogen separation system coupled with PSA, rectisol and membrane separation

Related Author

WANG Weiwen

ZHU Guojian

LI Jianlong

LI Ling

ZHANG Yu

LIU Linlin

WANG Chao

DU Jian

Related Institution

School of Chemical Engineering, Qingdao University of Science & Technology

Institute of Chemical Process Systems Engineering, School of Chemical Engineering, Dalian University of Technology

School of Control Sciences and Engineering, Dalian University of Technology

College of Chemistry and Chemical Engineering, Taiyuan University of Technology

SUPCON Technology Co.,Ltd.

⁰