Air separator

Fluid resistance refers to the pressure drop of fluid flowing through pipes, valves or equipment. The actual process pressure gradually decreased. In order to ensure the final pressure required by the process, a pressure source (gas compressor or pump) is needed to provide higher pressure, that is, more energy is consumed. Therefore, the amount of resistance reflects the amount of energy loss. In oxygen production, flow resistance is also closely related to the production process. For example, the resistance measurement of switching heat exchanger is the basis to judge whether self-cleaning is good. If the resistance of the distillation column is too large, the normal distillation conditions will be destroyed. The magnitude of resistance (i.e. energy loss) can be expressed by the pressure drop before and after the fluid flows through the vessel. For example, the gauge pressure at the bottom of the tower is 0.038 MPa, the gauge pressure at the top of the tower is 0.025 MPa, and the p

In the main column of the air separation column, the distribution of argon varies with the position of the liquid air inlet. With the increase of liquid air inlet position, the maximum concentration of argon enrichment zone in the stripping section also increases, and the nitrogen content in the distillate can be reduced. However, the argon content in the downstream also increases. In order to ensure the purity of oxygen, more trays are needed under the extraction port of argon fraction. Therefore, in the case of producing argon, the position of liquid air supply E1 should be appropriately increased compared with the case of not producing argon. Some unit is equipped with two liquid air inlet positions to meet the conditions of argon production and non argon production respectively. In the production of argon, in order to improve the extraction rate of argon, the content of argon in oxygen and nitrogen must be reduced. When the content of argon in exhaust nitrogen is more than 0.3%