Ion Exchange Unit

Ion Exchange Unit Two vertical transparent tubes mounted on a backboard contain the
cation and anion resins. A manifold arrangement at the inlet and outlet
to the tubes allows the flow configuration to be changed to simulate the
cycles involved in the operation of a deioniser. Union couplings permit
the tubes to be removed from the manifolds and interchanged for
softening/demineralisation experiments.

Regenerant and test or wash solutions
contained in separate sumps are selected by a traversing tube and
delivered to the apparatus by pump through a control valve and flow
meter. Effluent may be fed to a sump tank and treated water collected in
bottles for tests on hardnes, conductivity or dissolved solids. A
conductivity meter connected to the outlet of the second ion exchange
bed gives a continuous indication of the progress of demineralisation.
The apparatus is supplied with typical commercial cation and anion
resins. Other ion exchange materials may be used so that their
characteristics, exchange capacity etc, may be measured and compared.

Water Softening Theory

The usual ion exchange material employed in water softening is a
sulphonated styrene-based resin, supplied in the sodium form. This has a
strong affinity for calcium and magnesium ions and will also remove
ferrous ions after the almost complete removal of calcium and magnesium.
Softening may be carried out as a batch process by stirring a
suspension of resin in the water until equilibrium or an accepable level
of hardness is reached. It is more convenient to operate as a
continuous flow process, passing the water slowly downwards through a
column of resin beads. The exchange reaction takes place rapidly enough
for the upper layers of the bed to approach exhaustion before the lower
layers are able to exchange ions. Thus there is a zone of active
exchange which moves down the column until the resin at all depths
becomes exhausted. The position at an intermediate stage is illustrated.

When the zone of active exchange reaches
the bottom of the column the emerging water begins to show an
increasing hardness. This is the breakthrough point when it becomes
necessary to regenerate the resin with a strong sodium chloride
solution.

Technical Details

Pump: Self priming diaphragm type

Flowmeter range: 10-80ml/min

Sump tank capacity: 20 litres

Anion exchange resin: 0.75 litre

Cation exchange resin: 1litre

Chemicals required (not supplied):

Sodium chloride

Hydrochloric acid

Sodium hydroxide

Ordering Specification

Self-contained apparatus either for single bed water softening or double
bed system for demineralisation. Two vertical transparent tubes house
the resins. A manifold at inlet/outlet allows flow configuration
changes. Equipment includes pump, valves, conductivity meter and sumps
for regenerant and test or wash solutions. Typical commercial cation and
anion resins are supplied.

Recommended Equipment

Cartridge type water deioniser

Replacement cartridges

Beaker cell

Services Required

Electrical supply:

220-240V/1ph/50Hz

120V/1ph/60Hz

Shipping & Installation

We dispatch Ion Exchange Unit from our Ambala Cantt manufacturing facility to destinations across 90+ countries. All shipments include comprehensive documentation, technical manuals, and a Lab Instructor Guide.

• Packaging: Export-grade wooden crate with anti-corrosion lining
• Lead Time: 4-6 weeks for standard orders, customised lead time for bulk tenders
• Installation: On-site installation and commissioning by our certified engineers (optional)
• Training: Hands-on training for instructors and lab technicians provided
• Warranty: 12-month manufacturer warranty against material and workmanship defects