First of all, slight icing may be due to the vaporization of liquid nitrogen to absorb energy and cool down, resulting in water vapor condensation in the air, which is a normal phenomenon and is not a quality problem, and will not cause liquid nitrogen leakage.
Secondly, icing can also be caused by the heat exchange between the inner and outer tanks of the container and the condensation of water vapor in the air. In this case, if the ice is severe, it needs to be inspected and repaired.
In addition, if the vacuum of the liquid nitrogen tank is damaged, or if the tank is just filled with liquid nitrogen or the tank is directly filled with liquid nitrogen without pre-cooling, the ambient temperature will drop due to the evaporation and heat absorption of liquid nitrogen, and the water vapor in the air will solidify and freeze. In addition, if there are problems in the design, manufacture or use of liquid nitrogen tanks, such as insulation failure, vacuum drops, etc., it can also cause the pipes to freeze.
In order to solve the problem of freezing of liquid nitrogen pipelines, the following measures can be taken: first, check whether the vacuum degree and insulation layer of the liquid nitrogen tank are intact, and repair or replace them in time if there is a problem; Secondly, make sure to follow the correct operating procedures when using the liquid nitrogen tank, such as pre-cooling, reducing the number and time of opening the lid, etc.; Finally, if the icing is serious, you can take heating, defrosting and other methods to deal with it, but you should pay attention to safety to avoid damage to the equipment or injury to the manufacturer.
In conclusion, there can be a variety of causes of freezing in liquid nitrogen pipelines, which need to be analyzed and treated on a case-by-case basis. During use, the correct operating procedures should be followed, and the equipment should be checked and maintained regularly to ensure safe and stable operation.
For more cryogenic pipeline content, pay attention to the official website of Bender Cryology.