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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Optimization of DHX Process of Light Ends Recovery

Author of the article:Liu Yifei, Zhu Lin, Wang Ke, Long Haiyang, Pu Liming

Author's Workplace：1.College of Chemistry and Chemical Engineering, Southwest Petroleum University 2;China Petroleum Engineering Co., Ltd. Southwest Company

Key Words：Light ends recovery; DHX process; C3 recovery ratio; Optimization

Abstract：

In order to optimize DHX process of light ends recovery, analyzed is the effect of pre-cooling temperature of feed gas, expander outlet pressure and outlet flow percentage of low-temperature separator on C₃ recovery ratio. Analysis results show that C₃recovery ratio and propane compressor power increase at first and then decrease when pre—cooling temperature of feed gas decreases. C₃recovery ratio increases at first and then decreases and propane compressor power, compressor power and expander power decrease continuously when expander outlet pressure increase. C₃ recovery ratio and propane compressor power increase at first and then decrease when percentage of flow from low-temperature separator II to DHX tower increases. Through DHX process optimization, C₃recovery ratio can reach 98.00% when pre-cooling temperature of feed gas is -30°C and expander outlet pressure is 3.1 MPa, which has guiding significance for DHX unit design.