The energy consumption of air separation equipment includes all kinds of energy consumption, and the power consumption of operation equipment includes the power consumption of air compressor, water pump, refrigerator and oil pump. The energy-saving technology of air separation plant can reduce the operation power consumption of each equipment, reduce the unit consumption of the total product, and improve the economic benefits of the company. The energy-saving patent adopted by DEAR air separation products can better realize the energy-saving of air separation plant, save the power cost for the enterprise and improve the economic value.