Changing the way we manage water.
For Good.

The DeCalon system is a genuine re-think on the way water is treated. It is green chemistry in action and it delivers significant benefits. Introducing the DeCalon water treatment technology for evaporative cooling systems.

The DeCalon Device

DeCalon^TM (DCI) is a revolutionary approach to eliminating scale in cooling water systems. Through applied electro-chemistry and a patented intelligent controller DCI removes water hardness from cooling systems without the need for hazardous chemicals. The innovation provides a green technology solution to scaling and corrosion in large building HVAC systems and industrial chiller circuits.

The DCI system removes existing scale deposits and prevents further scale formation by driving a non-spontaneous redox reaction which precipitates CaCO₃ and Mg(OH)₂ at the cathode. The main causes of scaling, Ca²⁺ and Mg²⁺, can then be dumped out of the recirculating cooling water. SiO₂ is also removed. The system operates continuously so design heat transfer efficiency is maintained at all times and the non-regulatory requirement for routine shut downs for cleaning is removed. Water blow-down quantities are also reduced.

Benefits

The DCI system is green chemistry in action and delivers significant benefits:

Application

Industrial Chiller

Scale removal in industrial condensers and cooling towers reduces energy, water, maintenance and chemical costs.

application industrial chiller

Water Cooled HVAC Systems

A significant improvement in heat transfer and increased chiller efficiency leading to lower condenser approach temperatures.

How the DCI works

The DCI process is electrolysis, basic electro chemistry. The process removes scale and alters the chemical balance of cooling water which dissolves built upscale as a means of restoring equilibrium (Le Chatelier’s Principle). What differentiates the DCI is the Intelligent controller’s ability to remove scale sufficiently to maintain good heat transfer but not excessively to cause corrosion.

Reactions at the cathode surface

Cathodic reduction
Precipitation

The cathodic reduction reaction results in an excess of hydroxide ions in the boundary layer near the cathode surface. In the absence of buffer the pH rises. The high pH conditions (>10) only prevail near the cathode while the bulk of the water remains at the feed pH. The alkaline environment induces the precipitation of the Calcium and Magnesium hardness in the form of CaCO₃ and Mg(OH)₂ according to…

cathode_reactions-2

The intelligent controller maintains the cell potential required to drive these non-spontaneous reduction reactions.

Reactions at the anode surface

Anodic oxidation
Acidic catalyzation

A series of oxidation reactions occur at the anode resulting in the formation of gases and biocides, including chlorine and hydrogen peroxide.

Download The DCI Flyer and for more info about the science download our DCI Factsheet.

The DCI Flyer The DCI Factsheet

Changing the way we manage water. For Good.