AIR SEPARATION SYSTEM, METHOD FOR LOW-TEMPERATURE SEPARATION OF AIR, AND METHOD FOR CREATING AN AIR SEPARATION SYSTEM

摘要

The invention relates to an air separation system (100-700) comprising four separation units (1-4) in the form of a high-pressure column (1), a base section (2) of a two-part low-pressure column, the top section (3) of the two-part low-pressure column and a single-part argon production column (4), which has a top condenser (5a), wherein the four separation units (1-4) are connected to one another at least partially by means of lines (6) and/or are connected to one or more further devices (7, 8) at least partially by means of lines (6), wherein the lines (6) comprise one or more first lines and multiple second lines, wherein the one or more first lines is/are one or more lines that feed into a top region of the base section (2) of the low-pressure column, and/or a line that feeds into a gas compartment of a top condenser (5a) of the argon production column (4). According to the invention, the top section (3) of the low-pressure column has a smaller cross-section than the base section (2) of the low-pressure column, and vertically running sections of the second lines are accommodated at least partially in a cold box (20a, 40, 40a), which is designed as a column cold box (20a) in which the top section (3) of the low-pressure column is arranged, or designed as a separate line cold box (40, 40a) in which none of the four separation units (1-4) are arranged. The invention also relates to a corresponding method for the low-temperature separation of air and a method for creating a corresponding air separation system (100-700).