PLC-PFTC PLC Industrial Process Control for PFTC

COMPUTER CONTROLLED DRUM CELL FILTER - PFTC

INNOVATIVE SYSTEMS

The Computer Controlled Drum Cell Filter, "PFTC", is a unit designed to observe the operation of a filtering drum that acts on a liquid with suspended solids.

See general description

General Description

The Computer Controlled Drum Cell Filter, "PFTC", is a unit designed to observe the operation of a filtering drum that acts on a liquid with suspended solids.

Water with suspended solids is introduced in the system. The suspension can be done manually or with the additional unit recommended by EDIBON (Liquid/Solid Mixing Unit, "EMLS"). A computer controlled pump impels the fluid towards the drum tank. A sensor measures the pressure of the fluid before being introduced into the tank.

There is a stirrer in this tank to keep water mixed with the suspended particles. The rotary drum is covered by a filtering cloth, so the part immersed in the tank filters the water. Thus, clean water passes through the cloth and the suspended particles remain in the drum surface. Therefore, when the drum rotates the layer of suspended particles becomes a cake and it is cut before entering the tank again. This tank has an overflow, which can be located at different heights and keeps the water volume constant. ,

The cake must be separated from the filtering cloth before being cut. This can be done by two different methods: The first one is to apply vacuum in the inner side of the drum with a computer controlled vacuum pump and a vacuum tank. In this tank there is a pressure sensor to check that it works properly and a level sensor that detects the water height. It can also be removed with a compressed air connection, where the pressure can be regulated with a manual valve and measure its value with a pressure sensor. With both methods the cake dries and is taken off. When the cake comes off, it drops into a storage tank. Clean water goes to the vacuum tank.

Both the vacuum tank and the drum tank have a valve to drain them when required.

Exercises and guided practices

GUIDED PRACTICAL EXERCISES INCLUDED IN THE MANUAL

  1. Study of the suspended solids' filtration process and understanding of a drum filter mechanism.
  2. Study of the filtering cake formation with Darcy’s law.
  3. Observation of the volumetric and mass flows and the thickness of the filtering cake.
  4. Variation of the mass and thickness of the cake depending on the filtering volume.
  5. Variation of the mass and thickness of the cake depending on the drum revolutions.
  6. Mass balance depending on the suspension stirring speed.
  7. Mass balance depending on the stirring speed in the drum tank.
  8. Sensors calibration.

MORE PRACTICAL EXERCISES TO BE DONE WITH THE UNIT

  1. 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.
  2. The Computer Control System with SCADA allows a real industrial simulation.
  3. This unit is totally safe as uses mechanical, electrical and electronic, and software safety devices.
  4. This unit can be used for doing applied research.
  5. This unit can be used for giving training courses to Industries even to other Technical Education Institutions.
  6. Control of the PFTC unit process through the control interface box without the computer.
  7. Visualization of all the sensors values used in the PFTC unit process.
  8. By using PLC-PI additional 19 more exercises can be done.
  9. Several other exercises can be done and designed by the user.

Quality

AFTER-SALES SERVICE