| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for separating air through refining operation. SOLUTION: Compressed and refined vapor air stream and liquid air stream pass through each of inlets 20 and 34, respectively, and then is fed into a high pressure refining tower 18. The oxygen enriched liquid stream passes from an outlet 46 of a high pressure refining tower 18 through a re-boiling device 48 and an expansion valve 50 and flows into a container 52. The oxygen enriched liquid is partially gasified by a boiler 54 installed in the container 52. Residual liquid passes from the container 52 through an outlet 61, passes from a condenser 64 through an inlet 66 and further flows to a low pressure refining tower 56 where oxide product and nitride product are separated. Vapor stream passes through an outlet 58, enters from the boiler 54 and the container 52 and flows toward a pipe line 60 for returning air for use in compressing air. In the case that oxygen is separated, a further high rate of collecting argon can be attained by this cycle. |
