System and method for evaporating liquefied natural gas by utilizing intermediate medium

A technology of liquefied natural gas and natural gas, which is applied to container discharge methods, indirect heat exchangers, lighting and heating equipment, etc., can solve the problems of large circulation resistance, high investment, and large volume of intermediate media, and achieve reduced circulation resistance and energy saving The effect of low tube sheet cost and manufacturing cost

Active Publication Date: 2014-09-03
LIAOHE GASOLINEEUM EXPLORATION BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to large equipment volume, high investment, and high intermediate medium circulation resistance and high energy consumption

Method used

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  • System and method for evaporating liquefied natural gas by utilizing intermediate medium

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Embodiment Construction

[0037] like figure 1 As shown, the system for vaporizing liquefied natural gas using an intermediate medium provided by the present invention includes: a first medium outlet 1, a second medium outlet 2, a second pipeline 3, a lower cavity 4, an LNG inlet 5, and an upper cavity 6 , LNG pipeline 7, first heat exchanger 8, first medium inlet 9, second medium inlet 10, LNG outlet 11, internal support pipe 12, circulation pump 13, second heat exchanger 14, natural gas outlet 15 , natural gas outlet 16, heat medium inlet 17 and heat medium outlet 18.

[0038] Wherein, the lower cavity 4 and the upper cavity 6 are connected to each other by welding two cylindrical cavities. The central axis of the lower cavity 4 is horizontal, and the central axis of the upper cavity 6 is vertical.

[0039] The upper cavity 6 is provided with a first medium inlet 9 , and the lower cavity 4 is provided with a first medium outlet 1 . Specifically, the first medium inlet 9 is located at the top of th...

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Abstract

The invention provides a system for evaporating liquefied natural gas by utilizing an intermediate medium. The system comprises an upper part cavity and a lower part cavity which are communicated with each other, wherein the upper part cavity internally comprises a heat exchange relation of the intermediate medium and the liquefied natural gas, the lower part cavity internally comprises a heat exchange relation of a second medium and the intermediate medium, the intermediate medium in a steam form is raised to the upper part cavity to perform heat exchange with the liquefied natural gas, and simultaneously, condensation is performed to the intermediate medium in the steam form. The invention also provides a method for evaporating the liquefied natural gas by utilizing the intermediate medium. The method comprises the steps of: heating the liquefied natural gas by utilizing the intermediate medium, utilizing water with normal temperature as the second medium to heat the intermediate medium, and utilizing the generated intermediate medium in the steam form for heating the liquefied natural gas, therefore, additional condensation equipment is not needed for performing temperature reduction to the intermediate medium in the steam form, circulating resistance of the intermediate medium is reduced and the energy efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of fluid medium heat transfer and heat exchange, in particular to a system and method for vaporizing liquefied natural gas by using an intermediate medium. Background technique [0002] As natural gas is widely used in all aspects of life, natural gas transportation technology has developed accordingly. At present, natural gas is often transported after being liquefied, and heated to vaporize before use. The vaporization of low-temperature liquefied natural gas requires a large amount of heat energy. Usually, normal temperature water or seawater is used to heat the liquefied natural gas to vaporize it. However, if the water is directly heated, the local slow flow area is very easy to cool down too much and freeze, so that the flow rate is reduced, the heat supplement is less, and finally all of them are blocked by freezing. Therefore, it is necessary to use an intermediate medium that is not easy to freeze...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C7/04F28D7/00
Inventor 郭野愚李明辉胡大鹏刘文伟王荧光代玉强李研
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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