Scraped floor heat exchangers have been used for troublesome heat switch purposes involving viscous fluids or where fouling is a matter, such as evaporation processes. The commonest type of scraped floor heat exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the floor of the tube. The well-liked HRS R Series is based on this method. However, the design just isn’t optimum for each situation, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped surface warmth exchangers is right for viscous products similar to cream and tomato juice, in addition to merchandise containing fruit items or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is specifically designed to offer the improved heat switch of a conventional SSHE, however with a delicate action to protect the standard and integrity of delicate food products similar to cheese, yoghurt, ice cream, meat paste, and merchandise containing entire items of fruits or vegetables. Over the years, a quantity of completely different scraper designs have been developed, which means that each software, from processing curds to heating sauce or pasteurizing fruit compotes can be handled in probably the most efficient but mild method possible. Other functions where the Unicus Series has been helpful embrace handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design makes use of a patented stainless-steel scraping mechanism that moves hydraulically backwards and forwards within every inside tube. pressure gauge performs two key capabilities: it minimizes potential fouling by maintaining the tube wall clear and in addition creates turbulence throughout the material. Together, these actions increase the rate of heat switch in the material, creating a highly efficient course of that is best for viscous and high fouling supplies.
Since they are managed separately, the pace of the scrapers can be optimized for a specific product being processed, so that materials that are susceptible to shear stress or strain harm (such as creams and custards) can be dealt with delicately to stop damage while nonetheless providing high levels of warmth switch. The Unicus Series has proven particularly useful in dealing with viscous meals products the place texture and consistency are important attributes. For instance, some lotions or sauces may shear when subjected to excess strain, making them unusable. The Unicus means that effective warmth transfer can be carried out at low pressures which overcomes these issues.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller models a pneumatic cylinder could be supplied instead), a separation chamber to make sure hygiene and protect product separation from the motor, and the heat exchanger itself. The heat exchanger consists of numerous tubes, each of which accommodates a stainless-steel rod to which the appropriate scraping elements are fitted. Using a range of food-safe materials together with Teflon and PEEK (polyether ether ketone), these provide completely different inside geometry setups according to the application, similar to 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can additionally be totally scalable by rising the shell diameter and adding extra interior tubes from a single tube up to eighty in one shell. A key function is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product software. These seals prevent leakage of the product and ensure inner and external hygiene. A standard range of fashions for meals processing present heat transfer areas from 7 to 107 sq. feet, while bigger models up to nearly 1,300 sq. toes may be made for specific makes use of.
EXCELLENCE IN ACTION
One area the place the Unicus Series excels is in evaporation functions, the place the prevention of fouling is especially essential. HRS has a particular version of the Unicus to be used in evaporation models where volume reduction of the fabric is essential. The scraping action retains the warmth transfer surfaces clean so that Unicus evaporators can concentrate supplies to a degree 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 international gross 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 progressive warmth transfer options worldwide throughout a diverse vary of industries. With forty years’ expertise in the meals and beverage sector, specializing within the design and manufacture of an extensive range of turnkey techniques and parts, incorporating corrugated tubular, and scraped floor heat exchanger expertise, HRS units are compliant with international design and business requirements.For extra information, visit www.hrs-heatexchangers.com.
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