Liquid air separation plants by pumping dirty liquid nitrogen through the lower tower, lean liquid air, so that the liquid air separation plants does not reduce the extraction rate due to the liquefaction of part of the raw material air by pumping dirty liquid nitrogen through the lower tower. Liquid lean air allows the air separation plant not to reduce the extraction rate due to the liquefaction of part of the raw material air. The raw material air is liquefied in the liquefier to recover the low temperature cold energy of liquid air separation plants cold energy is used in stages, which can significantly reduce the electricity and water consumption compared to traditional liquid air separation plants.
The liquid nitrogen liquefies the air through the liquefier transferring the cold to the fractionator tower system, eliminating the leakage of methane to the fractionation system and making the liuqid air separation plants safe. The liquid air separation plants is gradually warmed up and vaporised in the high pressure heat exchanger, transferring the low temperature cold to the nitrogen, but not reheating to room temperature. The liquid air separation plant can recover its high-temperature cooling through a suitable refrigerant for intermediate and final cooling of the air compressor, improving the efficiency of the air compressor machine and saving energy and reducing consumption.
The complete sets of liquid air separation plants, small air separation units and large air separation units sproduced by Dear Air Separation are put into production to provide users with qualified products.
