No food loss with unique heat exchanger
HRS Heat Exchangers is shining a light on a forgotten area of food wastage at this year’s Propak Asia (stand BN42) – food lost during cleaning cycles and production changes. The HRS R Series of scraped surface heat exchangers removes food residues from inside the exchanger, meaning that food factories can now recover valuable product when heating, cooling or pasteurizing viscous or sticky foods.
HRS International Sales & Marketing Director Matt Hale explains: “Normally, when processing viscous food products such as honey, syrups and purées, a certain amount will adhere to surfaces, such as the inside of pipe work, or become left in equipment after processing. The value of these lost products soon adds up. For example, this issue is estimated to account for 3% of product losses in the US dairy industry1.”
“The R Series is particularly suitable for high value viscous products such as honey, molasses, and cooking sauces, where lost product can be expensive,” adds Matt. “We’ve designed the system so that the internal scraper bars can run in reverse to thoroughly empty the heat exchanger tubes and capture leftover product before changeover cycles commence.”
Traditionally flushing or so-called ‘pigging systems’ have been used to push product through key parts of the production system, like heat exchangers, yet both add complexity to the system and can result in high levels of product wastage. The R Series completes this process without the need for additional pumps or pressure systems, helping food factories reduce both capital and running-costs.
The HRS R Series is designed with a scraper bar within each inner tube to enhance product flow, prevent fouling during operation and minimize the pressure drop. Each scraper bar features a helical screw which rotates at high speed. This screw can be run in reverse, removing product from the heat exchanger tubes without damaging it or changing its characteristics. The R-Series can be configured for both horizontal and vertical operation, so that gravity can also be used to help recover product from the tubes. Each unit can be supplied with one, three or six tubes and multiple units can be combined for larger installations.
Globally some 5% of food loses occur during processing, although this varies according to region. In South and Southeast Asian countries the average figure is around 4% but this rises to 9% in North America. In other parts of Asia the figure is between 2% and 4%2. Globally the sectors with the highest waste levels are dairy, animal and meat processing, fruit and vegetable processing and the manufacture of oils and fats3.
Learn about the benefits of the HRS R Series on Stand BN42 in Hall 103.
² World Resources Institute & UNEP Working Paper: Reducing Food Loss and Waste – June 2013
³ Food waste: causes, impacts and proposals. https://www.barillacfn.com/m/publications/food-waste-causes-impact-proposals.pdf