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Natural gas liquefaction system for supersonic speed two-phase expansion refrigeration cycle

An expansion refrigeration and supersonic technology, applied in the field of liquefaction system, can solve the problems of complex process and low system efficiency of natural gas liquefaction system, and achieve the effects of low processing difficulty, improved system efficiency and low energy consumption

Pending Publication Date: 2021-11-26
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The embodiment of the present invention provides a natural gas liquefaction system with a supersonic two-phase expansion refrigeration cycle, which is used to solve the technical problems in the prior art that the natural gas liquefaction system has complicated processes and low system efficiency

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  • Natural gas liquefaction system for supersonic speed two-phase expansion refrigeration cycle
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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the drawing). If the specific posture changes, the directional indication will also change accordin...

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Abstract

The invention provides a natural gas liquefaction system for a supersonic speed two-phase expansion refrigeration cycle. The natural gas liquefaction for the supersonic speed two-phase expansion refrigeration cycle system comprises a plurality of countercurrent heat exchangers and a plurality of supersonic speed two-phase expansion machines, natural gas sequentially flows through the countercurrent heat exchangers to form a first circulation pipeline, and each supersonic speed two-phase expansion machine is arranged between the adjacent countercurrent heat exchangers to form a plurality of refrigeration units; a refrigerant sequentially passes through the multiple refrigeration units so that gaseous natural gas introduced into the first circulation pipeline can be liquefied. By means of the mode, the supersonic speed two-phase expansion machine is adopted as an expansion cooling device, the advantages of being high in expansion refrigeration efficiency, small in pressure drop, low in energy consumption, simple and compact in structure, free of moving parts, safe, reliable and low in machining difficulty are achieved, the number of devices is greatly reduced, the system process is simplified, and the system efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of liquefaction systems, in particular to a natural gas liquefaction system of a supersonic two-phase expansion refrigeration cycle. Background technique [0002] As a clean and environmentally friendly energy source, natural gas has been widely used around the world in recent years. The world is rich in natural gas resources, but some large natural gas wells are mostly located in desert areas, far away from densely populated and industrially developed areas, and are often blocked by large areas of ocean and complex topography and landforms, long-distance pipelines are laid, and even transoceanic gaseous The transportation of natural gas is often constrained by cost and technical issues. Therefore, long-distance natural gas transportation is mostly carried out by liquefied natural gas (LNG). It is of great significance to explore the natural gas liquefaction process. [0003] At present, there are many natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02
CPCF25J1/0257F25J1/0022F25J2205/10F25J1/0212F25J1/0055
Inventor 罗二仓曾钰培陈燕燕王晓涛董学强公茂琼
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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