Cold exchange system and method for comprehensively utilizing cold energy of liquefied natural gas

Abstract

The invention discloses a cold exchange system and method for comprehensively utilizing cold energy of liquefied natural gas. LNG is collected through an LNG storage tank and then pressurized by an LNG pump, the LNG enters refrigerating medium heat exchangers for heat exchange, and a refrigerating medium absorbs the cold energy of LNG and is pressurized by the refrigerating medium pump for use bycold users; after being used by the cold users, the reheated refrigerating medium returns to the refrigerating medium heat exchangers for recycling, and the LNG with cold energy absorbed by the refrigerating medium enters a natural gas pipeline network after being subjected to thermoregulation by natural gas thermostats, the cold energy in the LNG vaporization process is fully used, the LNG cold energy can be used in the ice and snow world, cold storages of different scales, ice making, circulating water stations, air conditioners and other types of cold users, the cold pollution caused by thesurrounding environment during LNG gasification can be effectively reduced, meanwhile the cooling power consumption of downstream cold users is saved, the carbon emission is reduced, and the production and operation costs of the downstream cold users are lowered.

Description

technical field [0001] The invention relates to the technical field of cold exchange, in particular to a cold exchange system and method for comprehensively utilizing the cold energy of liquefied natural gas. Background technique [0002] Liquefied natural gas (LNG) is currently one of the cleanest energy sources that can be used industrially in the world. As a green and efficient energy source, it is becoming more and more popular. Many fields have listed LNG as the preferred fuel. The proportion of natural gas in energy supply is rapidly increasing. LNG will release a large amount of cold energy during the vaporization process. Traditional large and medium-sized LNG receiving stations use open-frame seawater vaporizers, submerged combustion vaporizers, etc. to reheat LNG and send it to the pipeline network, which not only wastes valuable LNG cold energy, Also produce cold pollution to surrounding environment. Therefore, it is necessary to make full and effective use of L...

AI Technical Summary

Problems solved by technology

LNG will release a large amount of cold energy during the vaporization process. Traditional large and medium-sized LNG receiving stations use open-frame seawater vaporizers, submerged combustion vaporizers, etc. to reheat LNG and send it to the pipeline network, which not only wastes valuable LNG cold energy, Also produce cold pollution to the surrounding environment

Images