REPLACEMENT APPARATUS OF A LIQUEFIED GAS STORAGE TANK USING NITROGEN

摘要

PURPOSE: A substitution device of a liquefied gas storage tank using nitrogen is provided to reduce the material and equipment costs and to reduce the design and production costs since inert gas is not used but only nitrogen gas is used in an inert step. CONSTITUTION: A substitution device of a liquefied gas storage tank using nitrogen comprises a nitrogen gas generator(20) and a nitrogen gas feeding line(13). The nitrogen gas generator generates nitrogen gas. The nitrogen gas feeding line supplies the nitrogen gas to a liquefied gas storage tank(11). The nitrogen gas feeding line eliminates the gas from the liquefied gas storage tank. The nitrogen gas feeding line connects the nitrogen gas generator and the liquefied gas storage tank. The nitrogen gas generator comprises a main nitrogen gas generator and a secondary nitrogen gas generator. On the lower part of the secondary nitrogen gas generator, a valve is installed.