LNG optimal control reliquefaction system for recovery of LNG low-temperature waste heat generated in LNG gasification process

Abstract

The present invention relates to an LNG optimum control reliquefaction system for recovering low-temperature waste heat of LNG generated in the LNG gasification process. According to the present invention, the gaseous LNG is supplied to the place where the gaseous LNG is required. At this time, in order to be able to supply in the LNG storage tank A sufficient amount of gaseous LNG makes the liquid LNG pass through the load heat exchanger of the cold and heat supply part of the logistics warehouse to discharge cold and heat, and thereby raise the temperature of the liquid LNG or vaporize the liquid LNG, and can heat up or gasify the liquid LNG in this way. By supplying the liquefied LNG to the supply line where the gaseous LNG is needed, it is possible to expand the use and popularization of cold and heat of LNG, and to optimally control the flow of liquid LNG and gaseous LNG for reliquefaction, thereby enabling economical recovery of LNG Low-temperature waste heat of LNG generated in the gasification process.

Description

technical field [0001] The invention relates to the technical field of logistics warehouse cooling systems, in particular to an LNG optimum control reliquefaction system for recovering LNG low-temperature waste heat generated in the LNG gasification process. Background technique [0002] At present, LNG is used as green energy, and in order to use LNG, LNG bases with multiple LNG liquefied gas storage tanks are built on the coast. [0003] The LNG liquefied gas storage tank stores liquefied LNG gas, and in order to supply an appropriate amount of LNG gas to the required place, the liquefied gas is vaporized and then supplied to the required place (piping of city gas, etc.). [0004] In order to gasify LNG liquefied gas, gasifiers are generally used. Gasifiers are roughly divided into open-frame gasifiers and combustion-type gasifiers. The most economical open-frame gasifiers receive water (sea water) from the outside. By performing heat exchange, the liquid LNG undergoes a ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned prior art is only applicable to areas that require a large amount of LNG (specifically, NG gas as gaseous LNG), and it is difficult to introduce the above-mentioned system in an area with a small amount of LNG, and the above-mentioned system is basically a system that uses A system for gasification and utilization of liquid LNG

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