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LNG cold energy utilization method

A new method and technology of cold energy, applied in the new field of LNG cold energy utilization, can solve the problems of cumbersome operation and insufficient utilization, and achieve the effects of improving economic efficiency, improving utilization rate and high utilization rate

Inactive Publication Date: 2009-01-14
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
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Problems solved by technology

[0008] The object of the present invention is to provide a new method for utilization of LNG cold energy with high economic benefit, high utilization rate and simple operation in view of the above-mentioned problems such as cumbersome operation and insufficient utilization of LNG cold energy.

Method used

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  • LNG cold energy utilization method

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0027] The method mainly consists of four steps: reliquefaction, energy storage, energy release and optimization. In this example, the required temperature is relatively high, which is a secondary cold energy utilization method. The specific process of this method is as follows:

[0028] First of all, since the filling and discharging pipes in the LNG liquid storage tank are introduced into the liquid storage tank from the top or bottom of the LNG liquid storage tank, the LNG liquid is transported into the LNG liquid storage tank 2, which can prevent the liquid from being affected by temperature changes and liquid in the working process. The pressure has an adverse effect on the liquid storage tank, and at the same time, part of the flash gas o...

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Abstract

The invention discloses an LNG cold energy utilization new method, the method mainly comprises the following steps: step 1. Reliquefaction: the reliquefaction of flash LNG steam is carried out by a reliquefaction device; step 2. Energy storage: the heat exchange of LNG and energy storage materials in an LNG liquid storage device is carried out, and the released cold energy is stored in a cold storage device; step 3. Energy release: the energy storage materials are dissolved for releasing the cold energy which is further transferred to a tail-end cold energy utilizing device; step 4. Optimization: a part of the LNG can be directly gasified to produce the cold energy which is supplied to the tail-end cold energy utilizing device. The LNG cold energy utilization new method of the invention has simple structure of the needed system, convenient operation, high utilization ratio to LNG cold energy and high economic benefits.

Description

technical field [0001] The invention relates to a method for using energy, in particular to a new method for utilizing LNG cold energy. Background technique [0002] In the 21st century, while human beings usher in technology and economic booming, they are also facing the threat of various problems such as environmental degradation and urban population expansion, and energy shortage is also an aspect that cannot be ignored. In order to optimize the energy consumption structure, improve the ecological environment, and realize the sustainable development strategy, natural gas, as a clean, environmentally friendly, high-quality and efficient energy fuel, is widely used by countries all over the world, and its demand is also increasing day by day. Natural gas is an important part of the energy consumption in the world today, and it is called the three pillars of world energy together with coal and oil. [0003] Liquefied natural gas refers to natural gas liquefied at low temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D3/10
Inventor 章学来盛青青吕磊磊杨培莹叶金
Owner SHANGHAI MARITIME UNIVERSITY
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