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Compression recycling method for evaporation gas of liquefied natural gas

A technology for liquefied natural gas and compression recovery, which is applied in container filling methods, equipment loaded into pressure vessels, gas/liquid distribution and storage, etc., can solve problems such as vapor release and reduce complexity, investment and operation cost and operating cost savings

Inactive Publication Date: 2015-12-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a compression recycling method of liquefied natural gas evaporated gas, which solves the problem of releasing the evaporated gas in the liquefied natural gas storage tank

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  • Compression recycling method for evaporation gas of liquefied natural gas

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Embodiment Construction

[0027] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner ", "outside", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the inventi...

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Abstract

The invention relates to the technical field of liquefied natural gas, in particular to a compression recycling method for evaporation gas of liquefied natural gas. The method comprises the following steps that S1, after heat is absorbed by a liquefied natural gas storage tank, the liquefied natural gas in the liquefied natural gas storage tank partially evaporates into the evaporation gas; S2, after pressure in the liquefied natural gas storage tank rises, the evaporation gas flows out of a gas phase outlet of the liquefied natural gas storage tank; S3, after the evaporation gas flowing out in S2 is heated and pressurized, the evaporation gas is stored in an evaporation gas recycling tank; S4, after pressure of the evaporation gas in the evaporation gas recycling tank is lowered, the evaporation gas is fed into a liquefied natural gas tank car, and pressure in the liquefied natural gas tank car is increased; and S5, liquefied natural gas in the liquefied natural gas tank car is pressed out by high pressure to enter the liquefied natural gas storage tank. According to the compression recycling method for the evaporation gas of the liquefied natural gas, the problem of release of the evaporation gas in the liquefied natural gas storage tank is solved, and the amount of the evaporation gas generated by unloading and pressurization is lowered through evaporation gas unloading.

Description

technical field [0001] The present invention relates to the technical field of liquefied natural gas, in particular to a method for compressing and recycling boil-off gas, and more particularly to a method for compressing and recycling boil-off gas of liquefied natural gas. Background technique [0002] Liquefied natural gas (English: Liquefied Natural Gas, abbreviation: LNG) is a high-quality energy source with high calorific value and low combustion pollution. LNG filling station is a filling station that supplies LNG. When LNG is supplied in the LNG filling station, boil-off gas (English: Boil Off Gas, abbreviation: BOG) will be generated. If this part of BOG gas is directly discharged, it will cause environmental pollution and waste of energy. Therefore, it is necessary to recycle the BOG gas generated in the LNG filling station. [0003] In the existing technology, the BOG gas generated in the LNG filling station is usually collected, passed through a series of proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C5/06
Inventor 李兆慈刘照辰丁杨
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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