Novel LNG (Liquefied Natural Gas) cold energy recycling method and device

A new type of cold energy recovery technology, applied in the direction of heat exchanger types, fixed plate conduit components, heat storage equipment, etc., can solve problems such as energy waste, reduce costs, increase flexibility and operability.

Inactive Publication Date: 2017-06-30
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems, especially the waste of energy

Method used

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  • Novel LNG (Liquefied Natural Gas) cold energy recycling method and device
  • Novel LNG (Liquefied Natural Gas) cold energy recycling method and device

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Embodiment Construction

[0014] Such as figure 1 As shown, the liquefied natural gas enters the heat exchanger from the cold storage tank under pressure to exchange heat and then vaporizes. The cold energy is taken away by the countercurrent cold liquid and completely vaporized into gas at the outlet. The cooling liquid and the LNG are separated by the cooling liquid, so that the coldness of the LNG is first stored in the cooling liquid and then taken away by the cooling liquid. In order to ensure complete vaporization, further heat exchange is carried out with the cooling liquid in other layers of heat exchangers, so that the temperature rises again, and then enters the pressure gas storage tank. In this way, the utilization of LNG cold capacity and the storage of vaporized natural gas are realized.

[0015] Such as figure 2 As shown, the heat exchanger in the present invention is composed of a cold taking layer, a cold storage layer and an LNG layer. Each layer is composed of two partitions and ...

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Abstract

The invention provides a novel LNG (Liquefied Natural Gas) cold energy recycling method. As the country pay more and more attention to energy conservation and environmental protection and with growing concern about LNG used as a clean energy An LNG cold energy recycling method and equipment is developed for effectively utilizing cold energy produced in the LNG gasifying process. The system mainly comprises a liquid pump, a heat exchanger and a pipeline; three types of liquid, namely, LNG, cold storing liquid and cold discharging liquid, are in the heat exchanger at the same time; the cold energy of the LNG can be stored through the cold storing liquid and then supplied to the corresponding equipment through the cold discharging liquid; meanwhile, the gasified natural gas is supplied to an automobile engine. The cold energy recycling method is on the basis of the corresponding technological calculation; the cold energy utilization rate is high, and the safety coefficients are high, so that the energy conservation and utilization efficiency can be improved; the heat exchanger is the core device of the system and has the maximum characteristic of exchanging heat among the three types of liquid; more details of the structure diagram of the heat exchanger see the drawing of the abstract.

Description

technical field [0001] The invention relates to the field of conversion and utilization of cold energy, in particular to a novel method and device for recycling and utilizing LNG cold energy. Background technique [0002] At present, with the gradual improvement of energy conservation and environmental protection awareness, the natural gas industry is developing rapidly, and the utilization of LNG cold energy has developed rapidly. The main component of LNG is methane, and its combustion products are water and carbon dioxide, so it is a clean energy source. LNG is usually stored in storage tanks at -141°C (pressure 0.2-0.4MPa), and can only be effectively utilized in gaseous form after being vaporized. A large amount of cold energy is released during the vaporization process. If this part of cold energy Can not be fully utilized will cause a lot of energy waste. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D20/00F28D20/02F28D9/00
CPCF28D9/0062F28D20/0034F28D20/02F28D2020/0086Y02E60/14
Inventor 李健赵钟波
Owner CHANGZHOU UNIV
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