1.- Study of the influence of the superficial gas velocity on the mixing time and superficial fluid velocity.

2.- Study of the influence of the superficial gas velocity on the mass transfer coefficient.

3.- Study of the influence of the superficial gas velocity on the gas content.

Additional practical possibilities:

4.-  Sensors calibration.

Additional practical possibilities:

5-23.- Practices with PLC.

1. QRALC. Unit:

The Computer Controlled Airlift Reactor, (QRALC) allows to study the influence of the superficial gas velocity on the mixing time and superficial fluid velocity, the mass transfer coefficient and the gas content.
The Computer Controlled Airlift Reactor (QRALC) is an aerobic submerged reactor designed to determine the characteristic variables of the airlift reactor.
Anodized aluminum frame with panels of painted steel.
Diagram in the front panel with similar distribution to the elements in the real unit.
Airlift reactor, made of transparent material:

  - Diameter of outer column (reactor column): 200 mm.
  - Diameter of the riser column: 60 mm.
  - Height: 2000 mm.

PVC tank to store water (capacity 60 l. approx.).
Supply centrifugal pump, computer controlled.
Air compressor, computer controlled.
Two pressure regulators situated in the air and nitrogen lines to reduce the pressure in the inlet reactor.
Pressure sensor situated in the air line inlet.
Flow sensor situated in the air line inlet.
Four conductivity sensors.
Three oxygen sensors to measure the oxygen concentration at several levels of the reactor.
Two 3-way directional valves to select the gas fed to the reactor.

2. QRALC/CIB.Control Interface Box :

With process diagram in the front panel. The unit control elements are permanently computer controlled. Simultaneous visualization in the PC of all parameters involved in the process. Calibration of all sensors involved in the process. Real time curves representation. All the actuators’ values can be changed at any time from the keyboard. Shield and filtered signals to avoid external interferences. Real time control with flexibility of modifications from the PC keyboard of the parameters, at any moment during the process. Open control allowing modifications, at any moment and in real time, of parameters involved in the process. 3 safety levels: mechanical in the unit, electronic in the control interface, and the thirdone in the control software.

3. DAB. Data Acquisition Board:

PCI Express Data acquisition National Instruments board to be placed in a computer slot. 16 Analog inputs. Sampling rate up to: 250 KS/s. 2 Analog outputs. 24 Digital Inputs/Outputs.

4. QRALC/CCSOF.Computer Control+Data Acquisition+Data Management Software: 

Flexible, open and multicontrol software. Management, processing, comparison and storage of data. Sampling velocity up to 250 KS/s (kilo samples per second).

It allows the registration of the alarms state and the graphic representation in real time.

5. Cables and Accessories: 

 for normal operation 

6. Manuals:

This unit is supplied with 8 manuals.
Dimensions and weights (approx.)= Unit: Weight: 100 Kg. 950 x 550 x 2100 mm.
Control Interface Box: 490 x 330 x 310 mm. Weight: 10 Kg.