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DISTILLATION PROCESS
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.
The water separator outlet can be provided with an optional visaflow gauge so that the flow of distillate can be observed. This visaflow gauge is mounted in a convenient viewing place. Typical distilled solvent return to the degreaser is by gravity flow. When gravity return is not possible, an optional distillate receiver tank with transfer pump is recommended.
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a)
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Tank: 10 gauge, Type 304 stainless steel with modified “vee” bottom for ease of maintenance.
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b)
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External sweat copper solvent piping with bronze valves.
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c)
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Single point manifold water piping (inlet/outlet).
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d)
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360º finned copper internal cooling coils with stainless steel condensate troughs and coil supports.
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e)
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External stainless steel water separator with removable gasketed lid and internal finned copper cooling coil.
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f)
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Heating: Equipped with incoloy screw plug type electric heaters.
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g)
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Automatic liquid level make-up device for use with optional transfer pump.
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h)
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Wiring in NEMA 1 conduit. NEMA 12 type electric control panel.
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i)
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Marine type round cleanout door located at one end of still
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j)
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Minimum 1” thick tank wall heat insulation covered with stainless steel paneling for thermal qualities and first class appearance.
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k)
l)
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Top mounted access door for ease of maintenance
Equipment Controls:
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Liquid high temperature
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Low liquid level control
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High Vapor level control
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Water flow switch
Condenser Water Upper Limit Thermostat
Dial Thermometer
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A large variety of distillation rates and companion options are available for these systems.
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