How to reduce liquid nitrogen evaporation
Editor:adminClick：
Time:2019-10-18 09:18
Materials stored in liquid nitrogen dewar flasks with wide openings are protected by extremely low temperatures of liquid nitrogen or by gases caused by evaporation of liquid nitrogen.
When all liquid nitrogen evaporates, the temperature in the unit will rise slowly to the ambient temperature.
The evaporation rate of liquid nitrogen depends on the way the container is used and the age and condition of the container. As insulation efficiency deteriorates with age and roughing, evaporation increases.
Opening and closing to insert and remove materials and moving units will also increase evaporation rates.
Reminder:
(1) Boiling and splashing always occur when cryogenic liquids are used to fill containers or when objects are inserted into these liquids.
(2) Slowly perform tasks to minimize boiling and splashing.
(3) The container should be properly exhausted to prevent excessive pressure.
(4) do not store liquid nitrogen in uncovered containers for a long time.
(5) Do not completely seal the container.
(6) Do not immerse the hollow tube in liquid nitrogen, otherwise the liquid will be ejected.
(7) Only qualified gas suppliers can serve or correct cylinder-related problems.
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