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Working principle of air separation unit heat exchanger

Working principle of air separation unit heat exchanger
Working principle of heat exchanger of air separation unit: the heat exchanger is the heat exchange structure between multiple streams in the air separation unit, which is multi-layer plate fin type. The material flow between adjacent channels is used for good heat exchange through fins. The compressed air which is adsorbed by molecular sieve to remove water and carbon dioxide is cooled, and the reflux gas (liquid) is heated to normal temperature here.
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1.The cold box foundation is divided into frame type and non frame type. The levelness of top surface of frame type frame shall not exceed 1 / 1000. All sections of the frame shall be placed vertically. All bottom plates of non frame type cold box shall be kept at the same level, and the levelness shall not exceed 1 / 1000.   2.When installing the cold box plate, the adjacent two sides can beassembled into a whole piece or angle type on the ground. The length error of each diagonal line a...
Dec 23, 2020
When the air separation unit is in normal operation, the liquid flows down and can only flow on the tray and flow to the lower tray through the overflow bucket because the supporting force of the rising steam prevents the liquid from flowing down from the small hole of the tray. After shutdown, due to the interruption of rising gas flow, the liquid on the tray can flow from the overflow bucket to the lower tray, and also can flow through the small hole on the tray to the lower tray. This will cause the surface of liquid oxygen and liquid air rise, which may exceed the position of the expansion air outlet pipe, resulting in liquid carrying accident of the expander during restart. Therefore, pay attention to the liquid level position when stopping.
Dec 16, 2020
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