Cold box for air separation equipment

The cold box of the air separation unit is a square or circular metal structure, which is generally the highest mark of the air separation unit. The inside of the cold box includes the main heat exchanger, upper column, lower column, main cooler, argon condenser, liquid argon pump, liquid oxygen circulation pump, liquid oxygen delivery pump and valve pipeline. At the same time, the cold box needs to be filled with pearlite to reduce the cold loss.