西南石油大学学报(自然科学版) ›› 1998, Vol. 20 ›› Issue (1): 78-79(8.DOI: 10.3863/j.issn.1000-2634.1998.01.020

• 油气化学工程 • 上一篇    下一篇

轻油部分循环对丙丁烷收率的影响及其应用

诸林1 尹平2 邓兰1   

  1. 1.西南石油学院化工系,四川 南充 637001;2.川中矿区开发二公司 
  • 收稿日期:1997-04-02 修回日期:1900-01-01 出版日期:1998-02-20 发布日期:1998-02-20
  • 通讯作者: 诸林

Improving the Recovery of Propane and Butane by Partially Refluxing natural Gasoline

Zhu Lin1 Ying Pin2 Deng Lan1

  

  1. Dept. of Chemical Engineering, SWPI, Sichuan, 637001
  • Received:1997-04-02 Revised:1900-01-01 Online:1998-02-20 Published:1998-02-20
  • Contact: Zhu Lin

摘要: 油田轻烃回收装置随着原料气气质、气量的变化,丙丁烷的收率普遍偏低。提高丙丁烷的收率成了许多浅冷装置急待解决的问题。轻油部分循环法是方法之一,该方法从脱丁烷塔塔底引一股稳定轻油循环至蒸发器前的管线中,从而对汽液平衡施加影响。本文考虑温度、压力和组成对烃类混合物相平衡的影响,选用SRK真实气体状态方程研究轻油循环掺合比与丙丁烷收率的关系。经计算表明,在温度、压力一定时,只要有轻油循环,丙丁烷的收率就要提高,且随着掺合比的增加而增加,但增幅不尽相同。适宜的掺合比应根据经济分析的结果来确定。在油田气轻烃回收浅冷分离工艺的技术改造中运用轻油部分循环法可有效地提高丙丁烷的收率。

关键词: 状态方程, 轻烃回收, 低温分离, 天然气

Abstract: In natural gas liquids (NGL) plants, the recovery of propane and butane usually declines with the variation in composition and flow
rate of the raw gas. The method of partially refluxing natural gasoline, which uses a pipe to connect the evaporator with the exit at
the bottom of the debutanizer in order to let a part of steady gasoline return to the evaporator, is one of the ways to improve the recov-
ery. Taking into consideration of influences of composition, temperature and pressure on phase equilibrium of hydrocarbon mixtures,
the SRK real gas state equation is used to study the relationship between sophistication ratio and recovery of propane and butane. The
result shows that under steady temperature and pressure conditions, improved recovery can be obtained with gasoline cycling and with
the increase in sophistication ratio. The most appropriate sophistication ratio can be determined through economic analysis.

Key words: State equation, light hydrocarbon recovery, Low-temperature separation, Natural gas

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