Abstract Flare gas emission is a critical issue in the oil and gas industry due to its significant environmental impacts. While there are currently available solutions that can minimize the environmental risks of such emission sources, the implementation of these technologies generally brings additional economic and environmental challenges. Among the available technologies, the liquid ring compressor (LRC) is a promising option as it can compress and treat the flare gas simultaneously. However, there are several fundamental questions regarding the best operating conditions as well as the appropriate integration of such devices into a flare gas recovery system. This paper deals with the design of a flare gas recovery system consisting of liquid ring compressors and an aqueous amine solvent for the abatement of acid gases, mainly hydrogen sulfide. Three different system configurations are investigated to find the optimal system layout for the efficient and continuous recovery of flare gas in a refinery complex. In the first configuration, a simple compressor arrangement is considered without an amine recycling line between the compression stages. The second configuration involves an amine recycling line between the compression stages. Appropriate heat exchangers are added to cool down the amine recycling line in all compression stages in the last configuration. Results show that the amine consumption in the third configuration is 67% and 44% lower than the amine consumption in the first and second configuration, respectively. However, due to the additional cooling duty, the total required power in the third configuration increases by about 58% and 53% compared to the first and second configurations, respectively.

中文翻译：

---

液环压缩机的火炬气回收系统设计与仿真

摘要 火炬气排放是石油和天然气行业的一个关键问题，因为它对环境产生重大影响。虽然目前有可用的解决方案可以将此类排放源的环境风险降至最低，但这些技术的实施通常会带来额外的经济和环境挑战。在现有技术中，液环压缩机 (LRC) 是一种很有前景的选择，因为它可以同时压缩和处理火炬气。然而，关于最佳操作条件以及将此类设备适当集成到火炬气回收系统中存在几个基本问​​题。本文讨论了火炬气回收系统的设计，该系统由液环压缩机和用于减少酸性气体（主要是硫化氢）的水性胺溶剂组成。研究了三种不同的系统配置，以找到在炼油厂中高效和连续回收火炬气的最佳系统布局。在第一种配置中，考虑了一种简单的压缩机装置，在压缩级之间没有胺再循环管线。第二种配置涉及压缩级之间的胺回收线。在最后一种配置的所有压缩阶段中，添加了适当的热交换器以冷却胺回收线。结果表明，第三种配置中的胺消耗量分别比第一种和第二种配置中的胺消耗量低 67% 和 44%。然而，由于额外的冷却负荷，