Ion exchange is a special kind of solid adsorption process, it is by ion exchange agent
for the electrolyte solution. General ion exchange agent is a water-insoluble solid
particulate matter, that ion exchange resins. It can draw from the electrolyte solution
of a cation or anion, while the self-contained in another sign of the ions with same
charge and other quantities for them, and released into the solution to this is the
so-called ion exchange. According to the type of ion exchange, ion exchange agents can
be divided into cation exchanger and anion exchanger into two categories.
As a mature water treatment process, the ionic exchange has widely been used in the
production of purified water, highly purified water and demineralized water. It can be
used to remove the all kinds of ion and anion by taking advantage of exchange absorbance
property of cationic and anionic exchange resin. It can be divided into cation bed,
anion bed and combined bed. The salt can be remove by the combination of the beds to
attain the design requirement in water treatment. Ion exchange equipment is a requisite
for the production of highly purified water, and finds its wide applications in medicine,
chemical engineering, electronics, electroplating, and boiler. The electric resistivity
can reach 1-18MΩ.CM after combinations with RO, EDI equipment.