CARBON DIOXIDE GAS LIQUEFYING DEVICE USING LNG COLD

摘要

PROBLEM TO BE SOLVED: To provide a carbon dioxide gas liquefying device for liquefying the carbon dioxide gas with an indirect contact with LNG improved in the efficiency of utilizing LNG cold with a simple structure without using an intermediate coolant. SOLUTION: This carbon dioxide gas liquefying device is provided with a liquefying heat exchanger 42 provided with a cooling pipe or a cooling plate 45 for controlling a heat flow in response to the inside temperature when flowing LNG by coating a surface thereof, while adjusting thickness of the coating, to hold a coating surface temperature within a carbon dioxide gas liquefying possible temperature range. The carbon dioxide contained raw material gas to be supplied into the liquefying heat exchanger is liquefied in a coating surface by flowing LNG to the liquefying heat exchanger. COPYRIGHT: (C)2004,JPO