Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface warmth exchangers have been used for tough heat transfer purposes involving viscous fluids or the place fouling is an issue, such as evaporation processes. The commonest sort of scraped floor heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. The popular HRS R Series is based on this approach. However, On the QT is not optimal for every scenario, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped floor warmth exchangers is ideal for viscous products corresponding to cream and tomato juice, in addition to products containing fruit pieces or particles.
The HRS Unicus Series is particularly designed to provide the improved heat transfer of a traditional SSHE, however with a delicate motion to protect the quality and integrity of delicate meals products corresponding to cheese, yoghurt, ice cream, meat paste, and merchandise containing entire items of fruits or greens. Over the years, numerous completely different scraper designs have been developed, which means that every utility, from processing curds to heating sauce or pasteurizing fruit compotes can be dealt with in essentially the most environment friendly yet gentle means potential. Other purposes where the Unicus Series has been useful embody handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses a patented stainless-steel scraping mechanism that moves hydraulically forwards and backwards within every interior tube. The movement performs two key capabilities: it minimizes potential fouling by keeping the tube wall clear and likewise creates turbulence within the material. Together, these actions increase the rate of heat transfer in the materials, making a highly environment friendly process that’s perfect for viscous and high fouling supplies.
Since they are managed individually, the velocity of the scrapers could be optimized for a specific product being processed, in order that supplies which are susceptible to shear stress or pressure injury (such as creams and custards) may be handled delicately to forestall harm while still offering excessive levels of warmth switch. The Unicus Series has proven particularly useful in handling viscous meals products the place texture and consistency are necessary attributes. For instance, some lotions or sauces may shear when subjected to excess stress, making them unusable. The Unicus signifies that efficient warmth switch could be carried out at low pressures which overcomes these problems.
Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller items a pneumatic cylinder could be provided instead), a separation chamber to make sure hygiene and preserve product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of a variety of tubes, every of which accommodates a stainless-steel rod to which the suitable scraping parts are fitted. Using a variety of food-safe materials including Teflon and PEEK (polyether ether ketone), these present completely different inside geometry setups based on the appliance, such as 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can be totally scalable by growing the shell diameter and including more inside tubes from a single tube up to eighty in a single shell. A key feature is the specifically designed seals which separate the inside tube from the separation chamber, tailored to the product software. These seals forestall leakage of the product and guarantee inner and external hygiene. A normal vary of models for food processing provide warmth switch areas from 7 to 107 sq. feet, whereas larger fashions as much as almost 1,300 square ft may be made for particular uses.
One space where the Unicus Series excels is in evaporation applications, where the prevention of fouling is particularly necessary. HRS has a particular version of the Unicus to be used in evaporation items the place quantity reduction of the fabric is essential. The scraping action retains the heat switch surfaces clear so that Unicus evaporators can concentrate materials to a level that’s unattainable using conventional applied sciences. Unicus evaporators can be used in multi-effect setups or together with mechanical vapor recompression.
Matt Hale is worldwide sales and advertising director for HRS Heat Exchangers. Located in Atlanta, Georgia, HRS Heat Exchangers is part of the HRS Group, which operates on the forefront of thermal know-how, providing progressive heat switch solutions worldwide throughout a diverse vary of industries. With forty years’ expertise within the food and beverage sector, specializing in the design and manufacture of an extensive vary of turnkey systems and elements, incorporating corrugated tubular, and scraped surface heat exchanger expertise, HRS items are compliant with global design and trade requirements.For more data, visit

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