Ultra-low discharge pressure

During the start-up phase, when the liquid volume accumulates in the condensing evaporator, the gas and liquid mixture will pass through the liquid air and liquid nitrogen throttle valves. When the throttle valve begins to close, due to the large opening of the valve, when the amount of gas and liquid mixture from the lower column to the upper column changes little, and the pressure of the lower column does not increase significantly, it means that the temperature difference of the condensing evaporator has not increased. At this time, the condensing evaporator and the surrounding insulation have been cooled to the low temperature required by the liquid accumulation stage. Due to a large amount of cold production and a large amount of gas liquefaction, the liquid evaporation in the condensing evaporator is also increased. The rising steam produced prevents the flow of liquid from the sieve plate hole, and gradually accumulates liquid on the tray, so the liquid level will drop. In ad

Currently, there are three types of high-pressure aerators applied in the air separation plant: 1) Water Bath type. Put the coil into water with steam flowing in. Use hot water to gasification liquid oxygen (or liquid nitrogen, liquid argon. Coil pipe adopts one or more tubes with larger diameter (for example, φ25mm×2 ~ 3mm) winding. Generally, it is made into one layer, and the upper and lower layers are equipped with confluence pipes or collectors (no single one ). Both the import and export pipes face up. The tube material should use aluminum tube or stainless steel tube. Keep the water temperature at 80 ~ 90℃. Its advantages are good heat transfer performance, small volume, light weight and safe operation. The disadvantage is that it needs to consume a certain amount of steam whose pressure is about 0.4MPa. 2) empty bath type. The heat exchanger is placed in the atmosphere, and the low temperature liquid is heated by air to make it gasification. The heat transfer pipe adopts sta...