METHOD OF FREEZING SOLUTION DROPLETS AND THE LIKE USING IMMISCIBLE REFRIGERANTS OF DIFFERING DENSITIES

摘要

This disclosure describes a system for the continuous formation of frozen droplets of an aqueous salt solution. The refrigerant consists of two or more immiscible liquids of substantially different densities. Liquid droplets are injected into the lower, denser medium in a region maintained slightly above the liquid's freezing temperature. Heat is added to the lower medium and extracted from the upper medium at controlled rates. The droplets rise through the negative temperature gradient thus created in the lower medium, and through the turbulent interface between refrigerants. The frozen droplets are extracted from the surface of the upper medium.