SYSTEM AND METHOD FOR LIQUEFYING NATURAL GAS USING SINGLE MIXED REFRIGERANT AS REFRIGERATION MEDIUM

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United States of America Patent

APP PUB NO 20140283548A1
SERIAL NO

14354964

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Abstract

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A system and a method for liquefying natural gas using single mixed refrigerant as refrigeration medium are provided. The system comprises a two-stage mixed refrigerant compressor (1) driven by a motor, two coolers (21, 22), a liquid pump (4), three gas-liquid separators (31, 32, and 6), two throttling devices (51, 52), a plate-fin heat exchanger group (7) and a LNG storage tank (8). The method comprises the following steps: the mixed refrigerant is compressed step by step by using the two-stage mixed refrigerant compressor (1), separated step by step, and gas-phase and liquid phase mixed refrigerant streams obtained from the separation flow into different passages of the heat exchanger group (7) respectively for throttling and heat exchanging. Heat exchange curves of cold fluid and hot fluid in the whole heat exchange process match with each other better by using two-stage heat exchange, thereby flow of the mixed refrigerant is reduced effectively.

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Patent Owner(s)

Patent OwnerAddress
XINDI ENERGY ENGINEERING TECHNOLOGY CO LTDBUILDING B XINAO SCIENCE AND TECHNOLOGY PARK NO 118 HUAXIANG ROAD DEVELOPMENT ZONE LANGFANG CITY HEBEI PROVINCE 065000 LANGFANG CITY HEBEI PROVINCE 065000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fu, Jianqing Langfang, CN 1 8
He, Zhenyong Langfang, CN 2 15
Yu, Long Langfang, CN 60 314
Zhang, Sheng Langfang, CN 265 1612
Zhang, Xiaozhe Langfang, CN 16 26

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