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Atmospheric Distillation Model
Contaminated solvent to be reclaimed is transferred into the still by means of a fluid displacement switch controlling a transfer pump. The pump will transfer contaminated solvent from the degreaser or process tank to the still. This solvent / contaminant mixture is heated to the solvent’s boiling point; thereby vaporizing the solvent present, freeing it from the contaminated portion of the mixture. Solvent vapors rise and condense on the internal cooling coils. The condensed solvent and any entrained moisture drains by gravity into the condenser troughs and flows through piping to an external water separator. Water is separated from the distilled solvent at this point based on retention time and temperature. The discharged solvent is returned by gravity to the degreaser for reuse.
"Donkey" Atmospheric Distillation Model
The “Donkey” still is designed to reduce the maintenance / clean-out schedule of the main on-line process distillation system. In a typical vapor degreasing system that is subjected to heavy oils, greases, or contaminants in production loading; the main distillation system(s) is on stream continuously to remove the contaminants from the degreaser tank, distill the dirty solvent, and return the clean solvent back to the degreaser so the production work is exposed to the cleanest solvent possible.
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