CleanFlow for milk heat exchangers


The fouling of heat exchangers in pasteurized and UHT Milk is a serious issue resulting in the need to integrate Cleaning In Place (CIP) systems in order to maintain the function and performance of the heat exchanger and the flow of the fluid through it. The fouling of the heat exchangers in the Dairy Industry is so significant that CIP processes must be used on an extremely frequent basis, typically every 4-8 hours, resulting in very significant production losses in the range of 15-20%, increased water consumption per liter of processed milk, additional energy, additional chemical usage and additional waste water treatment, all of which contribute negatively to the environmental (CO2) footprint of milk processing.


Fouling deposits in milk heat exchangers Pipes with Smartflow in milk treatment Pipes with Smartflow in milk treatment


The composition of the fouling deposits in the milk heat exchangers has been analyzed in detail over the last 20 years and has been shown, in the case of low temperature processing during pasteurization, to arise from Type A fouling which is predominantly the build up of protein deposits caused by the denaturation and aggregation of the whey proteins (mainly beta lactoglobulin). Whilst in high temperature processing of UHT the predominant mechanism of fouling is the build up of calcium and phosphorous based mineral deposits, so called Type B fouling. As a result the chemical formulations, used in CIP processing, have been more and more tailored to efficiently target the removal of these specific deposits.

The use of the patented new Smartflow system for Milk applications completely removes the need for CIP processing as this externally applied milk pretreatment acts to prevent the build up of protein and mineral deposits in the plate and tubular heat exchangers via the application of a electromagnetic field (EMF) treatment to the milk immediately before it enters the heat exchanger.


The potential of treatment of water and other fluids against scaling and fouling using fixed magnets or magnetic fields is widely known and dates back as far as to the beginning of the 20th century. The early potential has not been realized as the efficacy and reliability of such treatments has always proven in practice to be very short lived and to fall far from expectation.


The Smartflow route has proven to be highly successful and differs from such systems in that it consists of applying an induced selective electromagnetic field to the milk, which in turn interferes with the mechanism of denaturation and aggregation of the proteins, as well as with the crystal formation of the mineral salts, and is thus very effective at preventing the formation and build up of the fouling in the heat exchangers.


The selective EMF is generated by feeding a specific pulse of electricity through coils that are wound around the outside of the inlet feed pipe of the heat exchanger. As the system is externally applied no interference is needed with the milk flow and milk production. Furthermore there is no compositional change to the milk as a result of the application of the low power RF electromagnetic field.





Contact information

Newtec Water Systems NV
Zandvoortstraat 12c
2800 Mechelen

Tel: 015 28 84 10
Fax: 015 28 84 19