Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor heat exchangers have been used for troublesome warmth switch functions involving viscous fluids or where fouling is a matter, corresponding to evaporation processes. The most common sort of scraped floor warmth exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the surface of the tube. The in style HRS R Series is predicated on this method. However, the design just isn’t optimal for every state of affairs, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is good for viscous merchandise similar to cream and tomato juice, as properly as products containing fruit items or particles.
The HRS Unicus Series is specifically designed to supply the improved heat transfer of a conventional SSHE, however with a mild action to protect the standard and integrity of delicate food merchandise similar to cheese, yoghurt, ice cream, meat paste, and products containing entire items of fruits or vegetables. Over the years, a selection of completely different scraper designs have been developed, that means that every utility, from processing curds to heating sauce or pasteurizing fruit compotes could be handled in the most efficient but gentle way potential. Other applications the place the Unicus Series has been helpful include handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses a patented stainless-steel scraping mechanism that strikes hydraulically back and forth within every inside tube. The movement performs two key capabilities: it minimizes potential fouling by preserving the tube wall clean and also creates turbulence inside the material. Together, these actions improve the speed of heat switch within the material, making a extremely environment friendly course of that is best for viscous and excessive fouling supplies.
Since they are controlled separately, the velocity of the scrapers may be optimized for a particular product being processed, so that materials which are susceptible to shear stress or strain harm (such as lotions and custards) can be dealt with delicately to prevent injury while still offering excessive levels of heat switch. The Unicus Series has confirmed significantly useful in dealing with viscous meals merchandise the place texture and consistency are important attributes. For example, some lotions or sauces may shear when subjected to extra stress, making them unusable. The Unicus means that efficient warmth switch could be carried out at low pressures which overcomes these issues.
Each Unicus SSHE consists of three parts: a hydraulic cylinder and power pack (although in smaller items a pneumatic cylinder can be provided instead), a separation chamber to ensure hygiene and protect product separation from the motor, and the warmth exchanger itself. The warmth exchanger consists of a number of tubes, every of which contains a stainless-steel rod to which the appropriate scraping components are fitted. Using a spread of food-safe supplies together with Teflon and PEEK (polyether ether ketone), these provide completely different inside geometry setups based on the application, corresponding to 120-degree scrapers for giant particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can also be fully scalable by rising the shell diameter and adding extra inside tubes from a single tube up to eighty in a single shell. A key function is the specifically designed seals which separate the internal tube from the separation chamber, tailor-made to the product utility. These seals prevent leakage of the product and guarantee inner and exterior hygiene. A commonplace vary of fashions for meals processing present warmth switch areas from 7 to 107 square toes, while larger models up to practically 1,300 square toes can be made for particular uses.
One area the place the Unicus Series excels is in evaporation applications, the place the prevention of fouling is especially essential. HRS has a particular model of the Unicus for use in evaporation units the place volume discount of the fabric is important. The scraping action keeps the heat transfer surfaces clean in order that Unicus evaporators can focus materials to a stage that’s unattainable using traditional applied sciences. Billion can be utilized in multi-effect setups or in combination with mechanical vapor recompression.
Matt Hale is worldwide sales and advertising director for HRS Heat Exchangers. Located in Atlanta, Georgia, HRS Heat Exchangers is a half of the HRS Group, which operates on the forefront of thermal expertise, offering revolutionary heat transfer solutions worldwide across a various range of industries. With forty years’ expertise within the meals and beverage sector, specializing within the design and manufacture of an extensive vary of turnkey techniques and components, incorporating corrugated tubular, and scraped surface warmth exchanger know-how, HRS items are compliant with world design and trade standards.For extra information, visit

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