At present, there are many forms and types of air separation equipment. There are mainly four basic processes: high pressure, medium pressure, high and low pressure and full low pressure.With the expansion of enterprise production scale, the demand for oxygen and nitrogen is increasing continuously. At the same time, the correct operation of air separation equipment is of great importance, which relates to the safety of air separation equipment and the long-term stable operation of production equipment.The principle of gas separation is to use the properties of the mixture to achieve partial separation of the mixture by condensation or evaporation.Partial condensation is suitable for situations where boiling points of components of the mixture vary greatly. If boiling points of components are close, it is difficult to achieve separation requirements by partial condensation.The most common method for air separation is deep freezing.Oxygen, nitrogen and rare gas can be produced by this method, and the purity of the gas product can reach 98.0%~99.9%.
