Scraped floor heat exchangers have been used for tough warmth switch applications involving viscous fluids or the place fouling is a matter, similar to evaporation processes. The most common kind of scraped floor heat 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 strategy. However, the design just isn’t optimal for each situation, and so HRS developed the Unicus Series of reciprocating scraped surface warmth exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is ideal for viscous merchandise similar to cream and tomato juice, as properly as merchandise containing fruit items or particles.
diaphragm seal is specifically designed to offer the improved warmth transfer of a traditional SSHE, but with a gentle motion to protect the standard and integrity of delicate food products corresponding to cheese, yoghurt, ice cream, meat paste, and products containing complete items of fruits or vegetables. Over the years, a variety of totally different scraper designs have been developed, that means that every application, from processing curds to heating sauce or pasteurizing fruit compotes can be dealt with in the most environment friendly yet gentle way attainable. Other applications the place 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 strikes hydraulically forwards and backwards inside each inside tube. The motion performs two key functions: it minimizes potential fouling by preserving the tube wall clear and likewise creates turbulence inside the materials. Together, these actions improve the speed of heat switch within the material, making a highly environment friendly process that’s best for viscous and excessive fouling supplies.
Since they’re controlled individually, the speed of the scrapers may be optimized for a specific product being processed, so that materials which are susceptible to shear stress or strain harm (such as lotions and custards) can be handled delicately to forestall harm while nonetheless providing high levels of heat transfer. The Unicus Series has confirmed particularly useful in handling viscous food products the place texture and consistency are essential attributes. For ไดอะแฟรม , some creams or sauces might shear when subjected to excess stress, making them unusable. The Unicus means that effective warmth transfer could be carried out at low pressures which overcomes these problems.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three elements: a hydraulic cylinder and energy pack (although in smaller units a pneumatic cylinder could be supplied instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of a variety of tubes, each of which incorporates a stainless-steel rod to which the appropriate scraping parts are fitted. Using a spread of food-safe supplies including Teflon and PEEK (polyether ether ketone), these present completely different inner geometry setups in accordance with the applying, corresponding to 120-degree scrapers for giant particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can additionally be fully scalable by growing the shell diameter and including more inside tubes from a single tube as a lot as eighty in a single shell. A key characteristic is the specifically designed seals which separate the inside tube from the separation chamber, tailor-made to the product software. These seals stop leakage of the product and ensure inner and external hygiene. A normal vary of models for food processing provide heat switch areas from 7 to 107 sq. ft, whereas larger fashions as a lot as practically 1,300 square feet could be made for specific makes use of.
EXCELLENCE IN ACTION
One space where the Unicus Series excels is in evaporation functions, where the prevention of fouling is particularly necessary. HRS has a specific model of the Unicus for use in evaporation models the place volume reduction of the fabric is crucial. The scraping motion keeps the heat transfer surfaces clean in order that Unicus evaporators can concentrate materials to a degree that is unattainable using conventional applied sciences. Unicus evaporators can be used in multi-effect setups or in combination 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 part of the HRS Group, which operates at the forefront of thermal know-how, providing revolutionary heat transfer options worldwide across a diverse vary of industries. With forty years’ expertise within the meals and beverage sector, specializing within the design and manufacture of an in depth range of turnkey systems and components, incorporating corrugated tubular, and scraped floor warmth exchanger technology, HRS items are compliant with world design and trade requirements.For more information, go to www.hrs-heatexchangers.com.
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