Method for separating air by cryogenic distillation and installation therefor

摘要

A method and apparatus for separating air by cryogenic distillation. The energy of an air separation installation is increased by reducing the size of the exchangers, and therefore increasing the head losses and the temperature differences in the exchange line, and increasing the temperature difference at the main vaporizer. The size of the distillation column is reduced by minimizing the number of theoretical trays and the number of sections of packing or trays. The size of the refrigerating turbine is also reduced by increasing its intake temperature in order to reduce the output.