Vacuum distillation apparatus

An improved vacuum distillation device for purifying a raw liquid comprising:

• a) evaporation apparatus having a boiling chamber, means for supplying raw and circulated liquid to said boiling chamber, means for maintaining the liquid level in said boiling chamber at a predetermined level and means for conveying vapor or gas from said boiling chamber;
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• b) condensation apparatus including:
• (i) a closed condensation chamber above said boiling chamber and communicating with said conveying means for receiving, cooling and condensing said vapor or gas to a distillate;
• (ii) a closed collection chamber below said condensation chamber;
• (iii) at least one bubble tube sealing interconnecting a lower portion of said condensation chamber and an upper portion of said closed collection chamber and extending downward into said closed collection chamber to a predetermined level;
• (iv) an open collection container for releasing vapor or gas to the atmosphere;
• (v) first transfer means, sealingly engaged and extending, at one end thereof, into said closed collection chamber, and disposed at a level above said predetermined level, and connected, at an opposite end thereof, to said open container, for conveying a mixture of vapor, gas, and distillate from said closed collection chamber to said open container;
• (vi) second transfer means sealingly engaged, at one end thereof, with the bottom of said closed collection chamber, and terminating, at an opposite end thereof, in said condensation chamber to convey only condensate or distillate and dispense condensate or distillate into said condensation chamber and cool said condensation chamber;
• and
• (vii) a tube, having a first end at a level, within said closed collection chamber, above said level of said end of said first transfer means extending into said closed collection chamber, and a second end sealingly connected to said condensation chamber, said tube having an internal diameter which exceeds the equilibrium diameter of gas, vapor, or air bubbles which are carried upward in said tube from said closed collection chamber to said condensation chamber.