摘要
通过寻找脱丙烷塔、脱丁烷塔的最优进料位置和增加预热换热器对进料预热等优化措施,可以降低天然气处理厂气体分馏单元的设备成本、能耗成本和总年度成本,同时也改变了装置内部各工艺参数之间的相互关系。为了研究工艺优化对气体分馏单元动态特性的影响,在基本设计和工艺优化设计稳态模型的基础上,利用Aspen Dynamics建立系统的动态模型,分别通过进料流量和进料组分扰动变化对两种设计的动态可控性进行评价。结果表明: 在双温度控制方案下,与基本设计相比,工艺优化设计不仅可以提高系统的热力学效率和稳态经济特性,系统动态特性也有一定程度的改善。研究结论对气体分馏单元的生产和开发具有重要的指导意义。
The equipment cost,energy cost and total annual cost (TAC) of gas fractionation unit in natural gas processing plant can be reduced through seeking optimization measures of the optimal feed position of depropanizer and debutanizer,and increasing preheating heat exchanger to preheat feedstock.The interrelationship among various internal process parameters of the plant is changed simultaneously.To study the impact of process optimization on the dynamic characteristics of the gas fractionation unit,based on the steady state model of basic design and process optimization design,dynamitic model is established by Aspen Dynamics.The dynamic controllability of the two designs are evaluated by the changes of feed flow and feed composition disturbance respectively.The result shows that under the dual temperature control scheme,in comparison with the basic design,not only can the process optimization design enhance system thermodynamic efficiency and steady-state economic characteristics,but also can it improve the dynamic characteristics of the system.The research conclusions have an important guidance for the production and development of gas fractionation unit.
作者
蔺权权
樊明理
彭立
Lin Quanquan;Fan Mingli;Peng Li(China Petroleum Engineering & Construction Corp.,Beijing,100120,china)
出处
《石油化工自动化》
CAS
2019年第4期24-31,52,共9页
Automation in Petro-chemical Industry
关键词
天然气
气体分馏单元
工艺优化设计
过程控制
动态响应
natural gas
gas fractionation unit
process optimization design
process control
dynamic response
