APPARATUS FOR MANUFACTURING LIQUID NITROGEN AND LIQUID OXYGEN

摘要

PURPOSE: An apparatus for producing liquid nitrogen and liquid oxygen is provided to operate low pressure column more stably by separating liquid air into gas stream and liquid stream. CONSTITUTION: An apparatus for producing liquid nitrogen and liquid oxygen comprises a high temperature portion(100) and low temperature portion(200). The high temperature portion comprises: a compressor(120) for compressing outer air; a sucking port(110) for sucking outer air; a separator(130) for removing moisture and foreign material from the compressed air; a pair of adsorption towers(140, 150) for removing remaining moisture, hydrocarbon gas, carbon dioxide, and nitrous gas; and a first cooler(160) for cooling the compressed air. The low temperature portion comprises: a main heat exchanger(210) and sub heat exchanger(220); a high pressure column(230); a low pressure column(240); a gas-liquid separator(250); and condenser(260).