Description Générale

The Computer Controlled Thin Film Evaporator "EPFC" has been designed to study (theoretical and practically) the different operating variables that influence the thin film evaporation process.

The unit is formed by a thin film evaporator, a shell-and-tube condenser, a liquid-ring vacuum pump, several tanks and the elements required to carry out the study of the different variables of the thin film evaporation process.

The solution to be concentrated is transferred from a storage tank to the evaporator by a peristaltic pump (computer controlled).

The thin film evaporator consists of a cylindrical tube with a steam heating jacket and an inner rotor with a motor (computer controlled). The liquid to be evaporated enters the evaporator above the heated zone and is distributed evenly over the inner circumference of the evaporator wall by the rotor, this produces a very thin liquid film on the cylinder wall. The vaporized solvent ascends through the evaporator and the concentrated liquid descends through the evaporator.

The steam is injected to the heating jacket from a steam generator (not included). This line includes a steam trap, a security valve, a check valve, a high pressure switch and a computer controlled solenoid valve.

The evaporator operates under vacuum conditions using the liquid-ring vacuum pump (computer controlled) to obtain vacuum levels in the evaporator.

The concentrated liquid is stored into a borosilicate glass tank. The vaporized solvent is condensed in the shell-and-tube condenser, through which cooling water flows, and then stored into a borosilicate glass tank.

Pressure, temperature and flow sensors are supplied where necessary, as well as adequate sampling and drain valves.

This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + a Control Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.

Des exercices et pratiques guidées


  1. Familiarization with a thin film evaporator.
  2. Study of the mass balance in a thin film evaporator.
  3. Study of energy balance in a condenser.
  4. Determination of global heat transfer coefficient.
  5. Optimization of the evaporation process.
  6. Sensors calibration.


  1. Many students view results simultaneously. To view all results in real time in the classroom by means of a projector or an electronic whiteboard.
  2. Open Control, Multicontrol and Real Time Control. This unit allows intrinsically and/or extrinsically to change the span, gains, proportional, integral, derivative parameters, etc, in real time.
  3. The Computer Control System with SCADA and PID Control allow a real industrial simulation.
  4. This unit is totally safe as uses mechanical, electrical and electronic, and software safety devices.
  5. This unit can be used for doing applied research.
  6. This unit can be used for giving training courses to Industries even to other Technical Education Institutions.
  7. Control of the EPFC unit process through the control interface box without the computer.
  8. Visualization of all the sensors values used in the EPFC unit process.
  9. By using PLC-PI additional 19 more exercises can be done.
  10. Several other exercises can be done and designed by the user.


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