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PROCESSING The Role of Heat Exchangers in Pet Food Production By Matt Hale, International Sales & Marketing Director, HRS Heat Exchangers Europe boasts some of the highest feed safety and animal welfare standards in the world, and consumers are increasingly knowledgeable about products and quality. However, producing high quality pet food which appeals to pets and their owners and which meets the necessary standards presents manufacturers with some specific challenges. Matt Hale, International Sales & Marketing Director, HRS Heat Exchangers Thermal processing is a key part of pet food manufacturing, with processes including heating (pre-conditioning), cooking, drying, pasteurizing and cooling. However, the thick, viscous nature of many of the meat-based products presents challenges for handling, heating and cooling. Heat exchangers, often based on designs for food and drink manufacture, provide a safe and energy-efficient method of performing these thermal processes to meet the stringent regulations on safety and quality which are often comparable to other foodstuffs. Scraped surface heat exchangers (SSHEs) are particularly well suited for pet food processing, including heating ingredients such as meat slurry, jelly and gravy before further processing, as well as heating or cooling soft meat or fish ingredients. However, while many food ingredients such as meat products and slurries are comprised of very thick and viscous materials, they often need gentle handling to preserve produce integrity and texture. Therefore, the exact choice of SSHE design will depend on the material being processed and the level of mixing required. The HRS R Series uses a rotary scraper bar which can reach speeds up to 300 rpm, providing high levels of shear and mixing at the heat transfer surface: increasing heat transfer. In contrast, the patented HRS Unicus Series uses a reciprocating design to provide high efficiency heat transfer in a range of Where ingredient integrity is not required by the end product, the HRS R Series of rotating scraped surface heat exchangers is ideal The patented HRS Unicus Series uses a reciprocating design to maintain product integrity 32 Technology & Marketing
PROCESSING difficult meat products which have high fouling potential, but which also need delicate handling to preserve fragile product integrity. Located in the UK, HRS Heat Exchangers is part of the EIL Group (Exchanger Industries Limited) which operates at the forefront of thermal technology. HRS offers innovative heat transfer solutions worldwide across a diverse range of industries. With 40 years’ experience in the pet food and feed sectors, specialising in the design and manufacture of an extensive range of turnkey systems and components, incorporating our corrugated tubular and scraped surface heat exchanger technology, HRS products are compliant with global design and industry standards. HRS has a network of offices throughout the world: Australia, Canada, New Zealand, UK, Spain, USA, Malaysia and India; with manufacturing plants in the UK, India, Spain and Canada. Technology & Marketing For more information www.hrs-heatexchangers.com Matt Hale and Ian Healey discuss the pet food sector > extruders > feeders > components > pneumatic conveying > complete systems COPERION’S ZSK Mv PLUS. LEADING-EDGE TECHNOLOGY FOR PET FOOD EXTRUSION. + Very gentle product handling for maximum quality + Hygienic design: open base frame, stainless steel + Less downtimes due to fast, efficient cleaning + Optimal accessibility + Screw speed up to 1800 rpm Coperion‘s ZSK pet food extruder is a top-quality product at the highest technical level. It is known for very gentle product handling at maximum throughput rates. For further information about Coperion‘s ZSK Mv PLUS please visit Issue our website 3 2022at www.coperion.com/petfood-extruders 33
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