Distillation: processes – separatory – With measuring – testing or inspecting – Of temperature or pressure
Patent
1988-01-27
1990-05-29
Bascomb, Wilbur
Distillation: processes, separatory
With measuring, testing or inspecting
Of temperature or pressure
203 91, 203DIG14, 203DIG18, 203DIG25, 134 12, 134109, 13751215, 202170, 202176, 202181, 2021853, 202202, 202205, 202206, B01D 342
Patent
active
049293125
ABSTRACT:
A solvent recovery system is provided which is characterized by improved efficiency and safety. The system includes an evaporator unit having a heat source for vaporizing contaminated solvent. The resulting vapors are subsequently liquified in a condensing unit. During evaporation and condensation of the solvent, a negative pressure is maintained within the system using a vacuum generator. After condensation, the liquid solvent passes into at least one accumulator which is periodically drained. The accumulator and vacuum generator operate in synchronization so that a vacuum is maintained in the system while drainage of the accumulator occurs. Since the evaporation and condensation systems of the invention are maintained at a negative pressure, any leaks therein do not result in the escape of flammable vapors.
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