Device for the low-temperature separation of air

An apparatus for the low-temperature separation of air comprising:

• a main heat exchanger (6) which comprises at least two heat-exchanger blocks,
• a distillation column system for nitrogen-oxygen separation (5) that has at least one high-pressure column,
• a subcooling-counterflow heat exchanger (2) which is separate from the main heat exchanger and is formed by a heat-exchanger block,
• a pipeline for introducing feed air via the main heat exchanger (6) into the high-pressure column,
• a pipeline for introducing a liquid stream from the distillation column system for nitrogen-oxygen separation (5) into the subcooling-counterflow heat exchanger (2),
• a pipeline for introducing a gas stream (16) from the distillation column system for nitrogen-oxygen separation (5) into the subcooling-counterflow heat exchanger (2),
• wherein the main heat exchanger (6) and the subcooling-counterflow heat exchanger (2) are arranged in a first cold box (12),
• the top end of the subcooling-counterflow heat exchanger (2) is arranged below the bottom end of the main heat exchanger (6), and
• the subcooling-counterflow heat exchanger (2), via at least one pipeline (17, 18, 19) which provides fluid communication between the main heat exchanger (6) and subcooling-counterflow heat exchanger (2), is suspended from the main heat exchanger (6), and said at least one pipeline (17, 18, 19) is the sole means for suspending the subcooling-counterflow heat exchanger (2) from the main heat exchanger (6).