Separation column system, for separation of high purity nitrogen or oxygen, has temperature measurements at high pressure column and mixer column to set purity according to temperature

摘要

To control the separation columns in a gas fractionating assembly, with a high and low pressure columns, the temperature is measured within the high pressure column. The purity of at least one product from the separating columns is set according to the measured temperature. To control the separation columns in a gas fractionating assembly, with a high pressure column (3) and a low pressure column (4), the temperature is measured (TIC1) at least at one point (50) within the high pressure column. The purity of at least one product from the separating columns is set according to the measured temperature. Alternatively, the temperature is measured (TIC2) within a mixing column (5), and the concentration profile is adjusted according to the measured temperature within it.