A customer in the wine industry has raised a problem of limescale in a heat exchanger: essentially, despite the use of a water softener that treats the entire water system of the plant, he complained that a heat exchanger in a year was filled of limestone so much to appear as a single block of stone.

The maintenance guy had to dip the tube bundle in the acid and leave it there for several hours, then finish the job by scraping where the acid had left residual crusts. Obviously he was not happy with the job and feared for his health.

We thus decided by mutual agreement to install an AQUARING 90 L on the cold water supply pipe to the exchanger and to do a test for four months; at the end of the period the tube bundle would have been dismantled and checked, knowing full well, however, that the same had been dismantled more than eight months before and then probably the conditions were those of the previous times therefore with an already substantial accumulation of limestone.

In the meantime we have been able to verify that in reality there were two heat exchangers and not one for which the signal of the assembled model was equally distributed between the two and therefore halved with respect to the maximum power previously provided for only one.

Despite the pejorative working condition, at the end of the period the tube bundle appeared as follows:

Two things are evident from the photos:

A year has passed since the exchanger has been dismantled and the tube bundle no longer appears as a single limestone block, as previously happened. but like an assembly of pipes covered with scales of material that flakes off to touch it; in many parts the metal of the tube reappears.
The limestone that accumulated in the nine months before the installation was bombarded with thousands of electrical impulses, broken up and detached, as foreseen thanks to AQUARING, and in any case nothing more was added to the pre-existing one.
The comment of the maintainer was: with this system I can avoid the use of acid, with all that this entails, and clean the tube bundle in half an hour with the simple use of the hydro cleaner as the limestone crusts come off easily with water pressure and the metal reappears perfectly clean.