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Cold energy usage process technology in liquid air separation plant 

Cold energy usage process technology in liquid air separation plant 
Dec 04, 2025
Author: DEAR AST

The raw air is compressed to about 0.52Mpa by the air compressor after filtering out dust and impurities, and then cooled to about 10℃ by the refrigerant glycol aqueous solution or Freon, and then enters the purification system to purify and remove water, carbon dioxide and other impurities in the air. Part of the raw material air enters the lower tower via the second raw material air pipeline, another part is liquefied into liquid air via the liquefier and enters the lower tower via the liquid air separation plant  pipeline, where the thermal mass is cross-condensed and evaporated, and the nitrogen, liquid nitrogen, dirty liquid nitrogen, poor liquid air and oxygen-rich liquid air are obtained in the lower tower in turn by the separation of the multi-layer tower plates.

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山东传洋集团KDON(Ar)-1800036000-520型空分设备

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1. Before filling with pearlite, the water accumulated on the foundation surface of air separation unit must be removed, dried with hot air, and all manholes shall be closed. 2. When filling pearlite, all containers and pipes in the cold box should be inflated and kept at 50kPa pressure, then slightly open the valve of each meter pipeline, and all thermometers should be electrified to check whether the thermometer cable is damaged during the filling process. 3. The filled pearlite shall not be mixed with combustibles. 4. When filling with pearlite, coarse mesh or pearlite pouring device should be set at the manhole on the top of the cold box to prevent whole bag pearlite from entering the cold box. 5. After the pearlite is filled, the manhole shall be sealed.
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