Tell me what you know about the composition of the lean liquid in the lower tower of air separation.
Thread Content
Tell me what you know about the composition of the lean liquid in the lower tower of air separation.
Different designs will vary, and the oxygen content is generally between 35% and 40%.
For us, the lower tower is generally rich in liquid, called oxygen-rich liquid air, and the purity is controlled between 36% and 40%. Higher or lower values will affect the purity of the product with high oxygen and nitrogen content.
For us, the lower tower is generally called oxygen-rich liquid air, and the purity is controlled between 36% and 40%. Either higher or lower will affect the purity of the product with high oxygen and nitrogen content.
The lean liquid in the lower tower of air separation is a name for the relatively oxygen-rich liquid air. Most people call it liquid nitrogen, and the Kaifeng process is often called lean liquid. The ingredients are actually easy to understand. In fact, after the high-pressure liquid air is throttled, it is pumped out on a tray above the lower tower mouth. The oxygen content in the air of the oxygen-rich liquid is between 36% and 40%, and the oxygen content in the lean liquid is between 18% and 20%.
Generally speaking, the lean liquid in air separation is the liquid nitrogen that is liquefied after the nitrogen at the top of the lower tower is heat exchanged by the main condenser. The purity will be a little worse than the low-pressure nitrogen taken out from the top of the upper tower, and the argon content will be higher, but basically the purity will be above 99.99%.
Liquid-poor air is a term relative to oxygen-rich liquid air. Oxygen-rich liquid air has a higher oxygen content than the atmosphere, while liquid-poor air is a liquid with a low oxygen content relative to the atmosphere. The purity of lean liquid nitrogen is probably 16-21% GO. If it is any lower, it is called dirty liquid nitrogen.