OPEN RACK TYPE VAPORIZER

PURPOSE:To provide an open rack type vaporizer in which problems of building of more heat exchanging panel, complicated piping are eliminated, a structure is simple, a heat exchanging efficiency is high, a temperature rise and vaporization are realized in an LNG vaporizer for regulating heat quantity of city gas, etc. CONSTITUTION:An open rack type vaporizer comprises an introducing nozzle 13 provided at a lower end of an outer tube 11 of a double tube type heat exchanging panel 10 having a heat exchanging tube of a double tube structure to mix liquefied petroleum gas with liquefied natural gas raised at its temperature and vaporized while moving down via a U-shaped flow to raise the temperature and vaporize it thereby to regulate heat quantity of the petroleum gas without separating and precipitating methanol in the petroleum gas. Another heat source, a special purpose heat exchanging panel of a conventional system is eliminated for vaporizing the petroleum gas thereby to reduce total number of the panels. Since the double tube type exchanger having high efficiency to raise a temperature and to vaporize the natural gas is employed, a flow rate hunting can be prevented, and adfreezing can be reduced.