The main raw material of air separation unit is air, which is treated by a series of system devices to separate pure gas. Energy saving and consumption reduction of air separation unit mainly refers to the reduction of production and operation cost by improving the production efficiency of air separation equipment. Energy saving and consumption reduction of air separation unit is very important to air separation equipment users, and it is the main measure to increase profits. DEAR air separation has two ultra-low pressure discharge energy-saving patents, which can reduce the energy consumption of air separation equipment by 5% - 15%, and effectively realize the energy saving and consumption reduction of air separation unit.