The energy consumption of air separation plant accounts for 70% - 80% of the cost of air separation products. Energy saving and consumption reduction of air separation plant has always been an important issue in the development of air separation technology. In the development process of energy saving and consumption reduction of air separation plant, we mainly start from two aspects: first, the design and manufacture of the device, but the operation of the equipment. DEAR air separation continuously improves the process and improves the energy-saving technology level of air separation to save more operating costs for customers.