KOMParet 50, 100, 200, 400

Retardation

Application

The KOMParet systems can be used for:

Extending the service life of pickling solutions that are based on hydrochloric acid, nitric acid, sulphuric acid, perchloric acid and hydrofluoric acid. The efficiency depends largely upon the prevailing acid / metal ratio.
Extending service life of anodizing solutions by the removal of the aluminium from the sulphuric acid. When used in combination with an individual treatment system for aluminium alkali etch solutions, a significant waste minimization in favour of material recycling can be achieved.

Process Characteristics

KOMParet systems employ ion exchange resins. However, ion exchange does not take place in the conventional sense as it does, for instance in a water recycling system.

The etching or pickling solution is pumped through the special resins of an adsorber column in an up flow direction. The free acid thus diffuses into the resin where it is retained - or retarded. The solution containing the metal salts passed through the resin and exits the adsorber column at the top.

Once the resin has adsorbed the free acid, the direction of flow through the adsorber is reversed, and water is fed through the adsorber column from the top. The free acid is now released into the water and is then recycled back into the process tank with a significantly lower metal content.

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Description of plant

The KOMParet-system includes the following main components:

Cooling of the solution (if necessary)
Pre-filtration
Retardation system
Storage tank and pumps

The operation of the plant is divided in following main steps:

Loading: Elimination of the free acid from the solution.
Regeneration: Recovery of the free acid.

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Advantages

Reducing of costs for neutralisation chemicals

Compact design

Lower acid consumption

Constant solution composition

Continuous filtration of the solution

Low personal costs