Generally, the liquefaction temperature of nitrogen is higher than that of oxygen, but the condensing evaporator between the upper and lower towers of the air separation tower can use the condensation of gas and nitrogen to vaporize liquid oxygen. This is because we usually think that the premise that the liquefaction temperature of nitrogen is lower than that of oxygen is under the same pressure, while the pressure at the top of the lower tower is about 0.58mpa, and the pressure at the bottom of the upper tower is generally 0.149ma, Different pressures cause the inversion of oxygen and nitrogen saturation temperature. Using this principle, the condensation evaporator can continuously provide liquid nitrogen as reflux liquid for the lower tower, and provide gas oxygen as rising gas for the upper tower to participate in fractionation.
Ten times hand in hand, win-win future: in the increasingly competitive market economy environment, what kind of charm does an enterprise have that is worth trusting customers? Kaifeng DEAR air separation Industrial Co., Ltd. and Hebei Anfeng iron and Steel Group Co., Ltd. have cooperated for ten times. From the signing of the first set of two-stage distillation low-pressure process kdon-15000/35000 air separation equipment in January 2009 to the successful commissioning of the tenth set of multi-stage distillation hydrogen free argon production KDON (AR) 30000/70000-900 air separation equipment in November 2018, Deere air separation has continued to write the industry legend with its strength for nearly ten years.
