OPERATION METHOD FOR INCREASING OR DECREASING PRODUCTION AMOUNT OF OXYGEN GAS ACCORDING TO PRESSURE CHANGE

摘要

PURPOSE: An operation method for increasing or decreasing the production amount of oxygen gas according to pressure change is provided to increase or decrease the production amount of the oxygen gas in a short time, thereby solving the problems such as the delay of working time, the drop of oxygen pressure and the production of poor goods. CONSTITUTION: The operation method comprises the steps of: detecting the shear pressure of an oxygen gas storage tank(40); increasing the oxygen gas amount by opening a guide van(82) of an air compressor(70) and increasing the amount of cryogenic liquid oxygen delivered to a main heat changer(30) so as to prevent temperature from rising, when the detected pressure is maintained lower than the determined value; and decreasing the oxygen gas amount by closing the guide van and decreasing the amount of cryogenic liquid oxygen delivered to the main heat changer so as to prevent temperature from falling, when the detected pressure is maintained higher than the determined value.