天然气液化级联混合制冷剂多级节流研究
Research on multistage throttling mechanisms in natural gas liquefaction process using a mixed refrigerant cascade system
孙娟 1史世杰 1万广浩 2李沅欣 2孙兰义2
作者信息
- 1. 中国石化中原石油工程设计有限公司,郑州 450000
- 2. 中国石油大学(华东)化学化工学院重质油国家重点实验室,青岛 266580
- 折叠
摘要
在天然气级联混合制冷液化工艺的基础上,设计出预冷段四级节流和液化段二级节流的级联混合制冷液化工艺的新流程.使用Aspen HYSYS和Matlab的遗传算法接口工具箱,采用改进非支配排序遗传算法,以系统最小比功耗为目标,对设计的新流程的操作参数进行全局优化,优化后系统最小比功耗降低至5.09 kWh/kmol LNG,比优化前降低了 5.9％.
Abstract
Based on the cascade mixture refrigeration liquefaction process of natural gas,a new liquefaction process with four-stage throttling in precooling section and two-stage throttling in liquefaction section was proposed.Using the genetic algo-rithm interface toolbox of Aspen HYSYS and Matlab,the modified non-dominated sequencing genetic algorithm was adopted to globally optimize the operating parameters of the proposed new process,aiming at the minimum specific power consumption of the system.After optimization,the minimum specific power consumption of the system is reduced to 5.09 kWh/kmol LNG,which is 5.9％lower than before optimization.
关键词
级联混合制冷/节流级数/比功耗Key words
Mixed fluid cascade/Throttling stages/Specific power consumption引用本文复制引用
出版年
2024
NETL
NSTL
万方数据