LNG液化厂脱乙烷塔系统的动态模拟

Dynamic simulation analysis of deethanizer in LNG plant

关键词:  脱乙烷塔  HYSYS动态模拟  精馏塔  动态特性 

Key words:  deethanizer  HYSYS dynamic simulation  distillation column  dynamic characteristic

摘要:

基于某天然气液化装置的脱乙烷塔系统,应用HYSYS Dynamic流程模拟软件,建立脱乙烷塔系统动态模型,研究脱乙烷塔系统在回流量扰动、再沸器热负荷增加等因素扰动变化时,整个系统的温度、压力、产品组成等工艺参数随之变化的动态响应过程,并针对具体工况提出应对措施。分析表明,动态模拟能够清晰地反映脱乙烷塔系统工艺参数随扰动变化的动态响应特性,可离线预测应对扰动的措施,指导设计工作中设备设计裕量的选取,验证所选取控制系统的稳定性。 

Abstract:

A dynamic model of deethanizer system has been developed by a process simulation software-HYSYS Dynamic based on a real specified LNG plant. Dynamic responses of process parameters such as temperature, pressure, product component, etc. have been studied when the factors such as reflux rate, reboiler heat load, etc. were changed. The measures have been taken to deal with the specified scenarios. The analysis showed that dynamic simulation could clearly reflect the dynamic response of the deethanizer system, predict the rationality of the system to deal with the interference factors, instruct the selection of equipment design margin during the design stage and verify the stability of the selected control system.