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Main characteristics of the pilot

  • Industrial instrumentation

  • Flow switch of the condenser cooling water for operators safety

  • Borosilicate glass and stainless steel AISI 316L manufacturing

  • Level and temperature switches to protect heating element

  • Rigid process tubing

  • Electrical heating



Flash distillation (or simple distillation) allows the separation from a feed solution of the compounds present in this solution by evaporation.

The more volatile compound is partially evaporated then, after condensation and cooling, collected separately from the solution; this solution, partially depleted in the volatile product, is itself collected in a specific circuit after cooling.

The solution is fed continuously into the evaporation chamber.

The solutions used are binary mixtures which are or are not ideal.


Teaching objectives


Study of the following experimental parameters :

  • Continuous concentration of a solution by evaporation.

  • Influence of operating conditions on concentration of a solution.

Calculations :

  • Heat balance.

  • Mass balance.


Technical specifications



  • Polyethylene feed solution tank; 30 litres nominal volume.

  • Feed solution metering pump, AISI AISI 316L stainless steel body, P.T.F.E. diaphragm, manual control.

  • Borosilicate glass continuous boiler, electric heating, fitted with low level safety switch and high temperature safety switch.

  • Incline condenser, borosilicate glass body, AISI 316L stainless steel exchanger with baffles.

  • AISI 316L stainless steel distillate cooler.

  • Borosilicate glass distillate receiver, fitted with a drain valve in AISI 316L stainless steel.

  • AISI 316L stainless steel concentrate cooler.

  • Borosilicate glass concentrate recevier, fitted with a drain valve in AISI 316L stainless steel.

  • AISI 316L stainless steel connecting tubes for the process and reinforced PVC tube for cooling fluid.

  • Support framework with AISI 304L stainless steel tubes, aluminium connecting nuts and adjustable feet.



  • Cooling water feed to condenser fitted with variable area flowmeter with its adjusting valve and water flow switch to turn off heating in case of lack of cooling water.

  • IP55 command and control cabinet fitted with emergency stop, operating buttons and the following interfaces:

  • Boiler temperature controller.

  • Two digital temperature indicators with six Pt100 Ω type probes.


Dimensions and weight

1350 mm x 600 mm x 2500 mm ~ 150 kg.


Essential requirements

230 V / 50 Hz / Single phase: 3 kW.

Cold water 10°C / 3 bar: 0.6 m3/h.