Liquid nitrogen tank demisting device

The embodiment of the utility model provides a liquid nitrogen tank demisting device, and relates to the field of liquid nitrogen tank demisting. The liquid nitrogen tank demisting device comprises a containing bin and a demister, the containing bin is used for containing a liquid nitrogen tank, the demister is connected with the containing bin, the liquid nitrogen tank is sleeved with the demister, and the demister is used for spraying out high-temperature gas, so that white mist generated after the liquid nitrogen tank is opened is extracted. When the liquid nitrogen tank demisting device is used, the liquid nitrogen tank can be placed in the containing bin to be stored, after the liquid nitrogen tank is opened, the demister can spray out high-temperature gas, according to the Bernoulli's law, the wind speed generated by the sprayed-out high-temperature gas can be far larger than the speed of surrounding air at the moment, and therefore pressure difference is generated; by means of the pressure difference,