EII Ionenaustauschgerät.

The Ion Exchange Unit, "EII", is a self-contained unit composed by a panel, where two transparent columns are situated in order to put anionic and cationic resins, and also a spare column and a pump, which supplies the efficient from the tanks attached to the pipes, forming several circuits according to the process: softening, demineralization or regeneration.

The flow of the pump can be regulated and can be read in a flowmeter before the inlet of the first ion exchanger.

A conductivity meter connected to the outlet of the unit allows the students to measure the process and a useful and easy checking of the ionic exchange evolution.

The unit includes the most usual resins used in the process of softening water (styrene sulfonate, in its sodium form), which have a strong affinity with calcium and magnesium ions. When these have been eliminated, the solution also eliminates or retains the ferrous ion.

The diaphragm pump facilitates the circulation of water along the different circuits of the unit: flow through an anionic column, flow through a cationic column and successive flow through anionic and cationic column.

The unit allows for exchanging different materials, the resins and reagents employed, as well as the problem water.