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Cooling liquids

Image Number 2 for United States Patent #5207068.

Liquid is cooled in a columnar vessel having an inlet and an outlet for the liquid. The cooling is effected by introducing liquid cryogen into the vessel through a pipe. The liquid cryogen vaporizes and crates turbulence in the liquid in the vessel. Perforated plates dampen the turbulence and disengage the vaporized cryogen from the liquid being cooled. Pressurized gas is introduced from an inlet into the liquid beneath the liquid cryogen. This pressurized gas crates turbulence in the region where the cryogen enters the liquid and thus is able to prevent local freezing of the liquid in the mouth of the pipe. The liquid is typically water and the liquid cryogen typically liquid nitrogen.

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