Title Supersonic Condensation and Separation Characteristics of CO2-Rich Natural Gas under Different Pressures

被引：0

作者：

Zheng Y. ^{[1
]}

Zhao L. ^{[1
]}

Wang Y. ^{[1
]}

Chang F. ^{[1
]}

Dong W. ^{[2
]}

Liu X. ^{[2
]}

Li Y. ^{[2
]}

Zhang X. ^{[2
]}

Zhao Z. ^{[3
]}

机构：

[1] Engineering Management Center, Sinopec Shengli Oilfield Company, Dongying

[2] Technical Inspection Center, Sinopec Shengli Oilfield Company, Dongying

[3] Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao

来源：

Energy Engineering: Journal of the Association of Energy Engineering | 2023年 / 120卷 / 02期

关键词：

carbon dioxide; condensation; Laval nozzle; natural gas; separation; Supersonic separator;

D O I：

10.32604/ee.2023.022765

中图分类号：

学科分类号：

摘要：

Supersonic separation technology is a new natural gas sweetening method for the treatment of natural gas with high CO2 (carbon dioxide) content. The structures of the Laval nozzle and the supersonic separator were designed, and the mathematical models of supersonic condensation and swirling separation for CO2-CH4 mixture gas were established. The supersonic condensation characteristics of CO2 in natural gas and the separation characteristics of condensed droplets under different inlet pressures were studied. The results show that higher inlet pressure results in a larger droplet radius and higher liquid phase mass fraction; additionally, the influence of centrifugal force is more pronounced, and the separation efficiency and removal efficiency of CO2 are higher. When the inlet pressure is 6 and 9 MPa, the liquefaction efficiency at the Laval nozzle outlet increases from 56.90% to 79.97%, and the outlet droplet radius increases from 0.39 to 0.72 μm, and the removal efficiency is 31.25% and 54.52%, respectively. The effects of inlet pressures on the removal efficiency of the supersonic separator are complicated and are controlled by the combined effects of liquefaction capacity of the nozzle and centrifugal separation capacity of the swirl vane. © 2023, Tech Science Press. All rights reserved.

引用

页码：529 / 540

页数：11

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