Ice storage method and device comprising an atmospheric tower and utilizing cold energy of LNG

Inactive Publication Date: 2014-11-19
ZHEJIANG RUNQI ENERGY SAVING TECH +1
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  • Application Information

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Problems solved by technology

It solves the problems of cold energy utilization rate and easy condensation of refrigerant in the prior art

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  • Ice storage method and device comprising an atmospheric tower and utilizing cold energy of LNG

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Embodiment Construction

[0044]Below in conjunction with each accompanying drawing, the present invention is described in detail.

[0045] An ice storage method utilizing the cold energy of liquefied natural gas with an atmospheric tower, comprising the following steps:

[0046] 1) The liquefied natural gas first enters the atmospheric tower to exchange heat with the spray water, and then exchanges heat with the refrigerant coming out of the refrigerant storage tank to gasify. The gasified natural gas enters the natural gas user end, and the spray water after heat exchange flows into the The bottom of the atmospheric column is mixed with the water in the atmospheric column;

[0047] 2) The heat exchange cooled refrigerant in step 1) is then exchanged with the water in the atmospheric tower. At this time in the atmospheric tower, the water on the outer surface of the heat exchanger filled with refrigerant will condense into ice, and the refrigerant The temperature rises and returns to the refrigerant ...

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Abstract

The invention discloses an ice storage method and device comprising an atmospheric tower and utilizing the cold energy of LNG. In the gasification process of LNG, a liquid nozzle is utilized to spray water onto a first heat exchange coil, water and LNG exchange heat directly, the LNG temperature rises to be close to the lowest work temperature of a refrigerant, then LNG exchanges heat with the refrigerant through a heat exchanger to be gasified, the cooled refrigerant transmits cold energy to water through a second heat exchange coil, and ice storage is performed in water of the atmospheric tower; at the same time, water which is not condensed in the atmospheric tower is mixed with an external supplement water source through a circulating pump, and then the mixture enters the liquid nozzle and returns to the bottom of the tower after passing through the first heat exchange coil. On one hand, the direct heat exchange between water and LNG can be carried out, on the other hand, a refrigerant delivery pipe is free of condensation blockage caused by a condition that the LNG temperature is far lower than the lowest work temperature of the refrigerant.

Description

technical field [0001] The invention relates to the field of cold energy utilization of liquefied natural gas, in particular to an ice storage method and device with an atmospheric tower for utilizing cold energy of liquefied natural gas. Background technique [0002] In order to optimize the energy consumption structure, respond to the international commitment of energy conservation and emission reduction, and achieve sustainable development, natural gas, as the most clean, environmentally friendly, high-quality and efficient energy fuel among fossil energy sources, is widely used by countries all over the world, and its demand is also increasing day by day. In my country's "Twelfth Five-Year Plan", higher requirements are put forward for the development and utilization of natural gas, and at the same time, the development of LNG cold energy utilization technology and equipment is clearly pointed out. With the continuous growth of natural gas demand, the import volume of LN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C7/04F25C1/00
Inventor 袁灵成邱利民荣杨一鸣祁同刚
Owner ZHEJIANG RUNQI ENERGY SAVING TECH
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