Preparation device for liquefied natural gas

Abstract

The invention discloses a preparation device for liquefied natural gas. The preparation device is characterized by comprising a primary heat exchange system, a secondary heat exchange system and an expansion refrigeration system; the primary heat exchange system comprises a primary refrigerator, a primary heat exchange tube and a primary heat exchanger body; a compressed natural gas inlet pipeline is connected with the primary refrigerator and the primary heat exchange tube through pipelines, and valves are arranged on the pipelines; the secondary heat exchange system comprises a secondary refrigerator, a secondary heat exchange tube and a secondary heat exchanger body; and compressed natural gas flowing out of the primary heat exchange system is connected with the secondary refrigerator and the secondary heat exchange tube through pipelines, and the primary refrigerator and the secondary refrigerator are connected with a low-pressure natural gas outlet through pipelines. The preparation device is simple in structure, low in investment and cost, free of adopting energy, miniaturized, short in preparation period and particularly suitable for peak shaving for a compressed natural gas pressure reduction release station.

Description

technical field [0001] The invention relates to a preparation device of liquefied natural gas. Background technique [0002] Due to its high volumetric energy density, liquefied natural gas has become the preferred method of natural gas transportation and storage. At present, low-temperature liquefaction devices have been widely used in the field of commercial natural gas liquefaction. These systems are usually customized for long-distance transportation, and the liquefaction capacity is generally large. Such facilities require large investment, high cost and long cycle. Contents of the invention [0003] In order to solve the above-mentioned existing shortcomings, the main purpose of the present invention is to provide a practical liquefied natural gas preparation device, which has simple structure, small investment, low cost, no energy, miniaturization, and short preparation cycle, and is especially suitable for compressed natural gas liquefied natural gas. Peak shaving...

AI Technical Summary

Problems solved by technology

At present, low-temperature liquefaction devices have been widely used in the field of commercial natural gas liquefaction. These systems are usually customized for long-distance transportation, and the liquefaction capacity is generally large. Such facilities require large investment, high cost, and long cycle time.

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