Teaching equipment : Demineralisation unit

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Demineralisation unit

DESCRIPTION

This unit softens hard water by forcing it through a resin where an ion exchange occurs.

Two columns:
– One cationic column, which replaces the cations of the solution with H+ions.
– One anionic column, which replaces the anions of the solution with OH- ions.

Teaching equipment : Demineralisation unit - GPB T30

TECHNICAL SPECIFICATIONS

1- Supply tank - 4 sections
Solution of HCl
Solution of NaCl
Water to be treated (or solution)
Demineralized or distilled water
Volume : 100 L – PVC

2- Supply pump
Centrifugal (0-30 L/h) – electromagnetic
P = 0.37 KW

3- Rotameter
Stainless steel – with adjustment valve
0-100 L/h

4- Manifold – 3 valve set
Supply toward anionic column
Supply toward cationic column
Regeneration of the columns

5- Cationic resins
2 interchangeable types of resins, hard or soft
Transparent PVC column - DN50
Length 500 mm

6- Anionic resins
2 interchangeable types of resins, hard or soft
Transparent PVC column - DN50
Length 500 mm

7- Conductivity-pHmeter
Measurement on the line of the conductivity and pH
Conductivity : range 0-1999.9 µS/cm
pH : 0-14
Accuracy: ± 2%
Maximal temperature: 50°C

Possible to work with resins in series or in parallel, in back run or co-current.

PEDAGOGIC APPLICATIONS

• Illustration and understanding of the process of ion exchange.
• Capacity of the various resin materials : hard and soft.
• Comparison of untreated water flowing into an anionic column with untreated water flowing into a cationic column.
• Verification and study of the resin regeneration system.
• Follow up of the conductivity of the treated solution.
• Efficiency of the unit, study of saturation.
• Influence of the flow rate.
• Direct water supply.

Teaching equipment : Demineralisation unit - schema GPB T30

UTILITIES
Electricity : 380 VAC – 50 Hz
Evacuation
Network water

DIMENSIONS
Length : 1200 mm
Width : 800 mm
Height : 1500 mm

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Demineralisation unit

Didatec Technologie - ZA du Parc 42490 Fraisses - France - Tel : 33 (0)4 77 10 10 10 - Fax : 33 (0)4 77 61 56 49
E-Mail : didatec.technologie@wanadoo.fr