In the main air separation tower, the higher the feed inlet of the liquid air, the higher the concentration in the argon enrichment zone of the distillation section. This can reduce the nitrogen concentration in the argon fraction, but also increase the argon content of the downstream liquid. Therefore, more trays are needed below the argon fraction extraction outlet to ensure the purity of oxygen. Therefore, the position of the liquid air inlet should be appropriately raised during argon production.
In the past three years, DEAR Air Separation has obtained six patents in the field of air separation and auxiliary technology: a new main condenser evaporator, energy-saving and safe self-cleaning filters, energy-saving oxygen generators, energy-saving nitrogen water pre cooling systems for air separation, and efficient shell and tube heat exchangers.
