Date of Publication:2022-10-09

Journal:化工学报

Volume:70

Issue:2

Page Number:508-515

ISSN No.:0438-1157

Abstract:To improve the energy integration and equipment sharing level of LNG, a conceptual design of natural gas liquefaction system based on large-scale AP-XTM liquefaction process and integrated gas subcooling technology (GSP) integrated natural gas condensate (NGL) recovery process was proposed. The performance of the multi-stream heat exchanger, the unit power consumption and the recovery rate of ethane were considered as the three of basic characteristics to evaluate process performance. The simulation and analysis results show that the unit power consumption of proposed process is reduced to 0.45 kW?h?(kg LNG)-1 which is reduced by 6% compared with conventional independent process. Furthermore, recovery rate of ethane is 93% which prove that NGL's efficient separation is achieved. The thermodynamic analysis, exergy analysis and economic analysis prove that the proposed configuration has high thermodynamics performance and economic value. This study can provide guidance for natural gas engineering research and retrofitted design of natural gas liquefaction technology. ? All Right Reserved.

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