Scraped surface warmth exchangers have been used for difficult heat transfer functions involving viscous fluids or the place fouling is an issue, corresponding to evaporation processes. The most typical kind of scraped surface heat exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the surface of the tube. เพรสเชอร์เกจ relies on this strategy. However, the design isn’t 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 right for viscous merchandise similar to cream and tomato juice, as properly as merchandise containing fruit items or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is particularly designed to provide the improved heat transfer of a conventional SSHE, but with a gentle motion to preserve the standard and integrity of delicate food merchandise corresponding to cheese, yoghurt, ice cream, meat paste, and products containing complete items of fruits or vegetables. Over the years, a quantity of different scraper designs have been developed, which means that every software, from processing curds to heating sauce or pasteurizing fruit compotes may be dealt with in the most environment friendly yet mild means potential. Other applications the place 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 strikes hydraulically backwards and forwards within every interior tube. The motion performs two key features: it minimizes potential fouling by maintaining the tube wall clear and also creates turbulence throughout the material. Together, these actions enhance the rate of warmth switch in the material, creating a extremely efficient process that is ideal for viscous and excessive fouling supplies.
Since they’re managed individually, the velocity of the scrapers could be optimized for a selected product being processed, in order that supplies which are prone to shear stress or pressure harm (such as lotions and custards) can be handled delicately to prevent harm whereas still offering excessive levels of warmth switch. The Unicus Series has confirmed notably useful in dealing with viscous meals products where texture and consistency are necessary attributes. For example, some lotions or sauces could shear when subjected to excess strain, making them unusable. The Unicus signifies that efficient warmth switch could be carried out at low pressures which overcomes these problems.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three parts: a hydraulic cylinder and energy pack (although in smaller units a pneumatic cylinder may be supplied instead), a separation chamber to ensure hygiene and protect product separation from the motor, and the warmth exchanger itself. The heat exchanger consists of a quantity of tubes, each of which accommodates a stainless-steel rod to which the suitable scraping components are fitted. Using a spread of food-safe materials including Teflon and PEEK (polyether ether ketone), these provide totally different inside geometry setups in accordance with the applying, similar to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series is also absolutely scalable by increasing the shell diameter and including extra interior tubes from a single tube as a lot as eighty in one shell. A key characteristic is the specially designed seals which separate the internal tube from the separation chamber, tailor-made to the product application. These seals prevent leakage of the product and ensure internal and external hygiene. A standard vary of fashions for food processing present warmth transfer areas from 7 to 107 sq. feet, while larger fashions as a lot as nearly 1,300 square feet can be made for particular uses.
EXCELLENCE IN ACTION
One area where the Unicus Series excels is in evaporation applications, the place the prevention of fouling is particularly necessary. HRS has a particular model of the Unicus to be used in evaporation units where quantity reduction of the fabric is essential. The scraping motion retains the heat switch surfaces clean in order that Unicus evaporators can concentrate supplies to a level that’s unattainable utilizing conventional applied sciences. Unicus evaporators can be utilized in multi-effect setups or in combination with mechanical vapor recompression.
Matt Hale is international 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 technology, offering innovative heat transfer options worldwide across a various range of industries. With forty years’ experience within the meals and beverage sector, specializing within the design and manufacture of an intensive vary of turnkey methods and elements, incorporating corrugated tubular, and scraped floor warmth exchanger know-how, HRS items are compliant with international design and business requirements.For extra data, visit www.hrs-heatexchangers.com.
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