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Distillation system for treating waste organic solvent

  • US 5,217,579 A
  • Filed: 06/28/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 02/21/1991
  • Status: Expired due to Fees
First Claim
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1. In a system for treating liquid waste containing organic solvent to recover volatile compounds from said waste, said system having at least one distillation element for distilling a mixture of volatile compounds from said waste, the improvement whereinA. said at least one distillation element comprises(i) a decompression chamber having an upper end and a lower end and tubular walls at which compounds vaporize,(ii) an inlet for receiving said waste and an outlet for releasing said vaporized compound, and(iii) a rotating member within said decompression chamber having radially extending blades for spraying onto the interior of said tubular walls said waste received at said inlet,B. said system further comprises(i) a reduced pressure fractional distillation means coupled to said at least one distillation element for removing impurities from said distilled volatile mixture,(ii) a normal pressure fractional distillation means coupled to said reduced pressure fractional distillation means for separately distilling from a purified volatile mixture volatile compounds of lower boiling points and volatile compounds of higher boiling points,(iii) an airtight chamber connected to the lower end of said decompression chamber via a first valve, and(iv) a breaking mechanism having a breaking head movable from a position outside said airtight chamber to a position within said airtight chamber.

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