Dry after vaporizing liquid nitrogen
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Question: Process flow: Liquid nitrogen storage tank – air vaporizer – drying tower – filter – buffer tank – point of use. Why is a drying tower needed, given that the water content in liquid nitrogen should be very low?
Our setup does not have a drying tower or filters; it consists of a liquid nitrogen storage tank – an air vaporizer – a buffer tank – a filter (which actually needs to be added) – and the points where gas is used. The drying tower is intended to prevent water accumulation in the pipelines after hydrotesting, as well as the presence of impurities inside those pipelines. Since we have filters in front of the points where clean gas is particularly needed (such as nitrogen for dry gas sealing), there is no centralized filtration.
Based on the purity of nitrogen you use, generally a drying tower and filter are not required.