The principle of industrial oxygen making equipment is to use the air separation technology. Firstly, the air is contracted with high density, and then the condensation point of each component in the air is used to separate the gas and liquid at a certain temperature, and then it is further distilled. Industrial oxygen is usually obtained by this physical method. Oxygen generator is also called air separation equipment. According to the different quantity of products, it can be divided into small equipment below 800m3 / h; 1000-6000m3 / h medium equipment; Large scale equipment above 10000m3 / h. According to the quantity of products, the so-called 800m3 / h and 1000-600m3 / h represent the hourly output value of the oxygen production equipment from the air separation tower. The oxygen making equipment in China is composed of air compressor, precooling equipment, purification equipment and air separation tower.