Distillation: apparatus – Apparatus – Systems
Patent
1978-04-06
1980-05-27
Bascomb, Jr., Wilbur L.
Distillation: apparatus
Apparatus
Systems
202170, 202185R, 202206, 203 2, 134 12, 134109, B01D 300, B08B 704
Patent
active
042049130
ABSTRACT:
A dirty or otherwise contaminated volatile solvent or other treatment fluid including relatively more volatile non-flammable and relatively less volatile flammable constituents is recovered or reclaimed by boiling it off from its impurities. As the remainder is concentrated, the evaporated vapor becomes increasingly flammable. In a work process, a treatment tank is used for chemically treating work pieces in a volatile treatment fluid which has a liquid phase and a relatively non-flammable heavier-than-air vapor phase. In this process, heat energy is added to the fluid to maintain the upper vapor phase surface at a substantial distance above the upper liquid phase surface in the tank. When the treatment fluid becomes sufficiently contaminated with dirt introduced by the work pieces or otherwise, it must be removed from the tank and replaced with clean treatment fluid. The invention involves reclaiming the used volatile treatment fluid by confining it in a closed boiling vessel and boiling it off through a conduit back into the vapor phase of the fresh fluid in an active operating treatment tank to immediately combine the increasingly flammable evaporated vapors into the relatively non-flammable treatment fluid vapor in the treatment tank where the flammable constituents of those vapors will be condensed to join the liquid phase of the fresh fluid in the treatment tank.
REFERENCES:
patent: 2001956 (1961-12-01), Smith et al.
patent: 2310569 (1943-09-01), Booth
patent: 2771086 (1956-11-01), Kearney
patent: 3896829 (1975-07-01), Sabatka
patent: 4003798 (1977-01-01), McCord
Bascomb, Jr. Wilbur L.
Finishing Equipment, Inc.
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