The distillation column is an air separation equipment equipped with multi-layer tower plates (the working principles of the sieve Tower and the packing tower are the same. There is a liquid layer with a certain thickness on the tower plate. The distillation column is usually a two-stage distillation column, which is divided into two parts: the upper tower and the lower tower. Compressed air is sent to the lower part of the lower tower as the rising air after the moisture and carbon dioxide are cleared and cooled and expanded in the heat exchanger (the medium pressure process. Because it contains 21% oxygen, the corresponding saturation temperature is 100.05K at 0.6MPa. The liquid nitrogen condensing in the condensing evaporator flows down from the top of the lower tower as the recirculation liquid. Because the oxygen content is 0.01% ~ 1%, the saturation temperature at 0.6MPa is about 96.3 K. Thus it can be seen that the rising steam temperature at the bottom of the distillation to...
Nov 30, 2022
