Scraped surface warmth exchangers have been used for troublesome heat transfer applications involving viscous fluids or the place fouling is a matter, corresponding to evaporation processes. The most common type 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 relies on this method. However, the design just isn’t optimal for every situation, and so HRS developed the Unicus Series of reciprocating scraped floor warmth exchangers.
The Unicus Series of reciprocating scraped surface heat exchangers is right for viscous merchandise such as cream and tomato juice, in addition to products containing fruit items or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is specifically designed to supply the improved heat transfer of a standard SSHE, but with a mild motion to preserve the standard and integrity of delicate food products corresponding to cheese, yoghurt, ice cream, meat paste, and merchandise containing entire pieces of fruits or vegetables. Over the years, a quantity of totally different scraper designs have been developed, that means that every software, from processing curds to heating sauce or pasteurizing fruit compotes could be handled in essentially the most environment friendly yet gentle method potential. Other applications where the Unicus Series has been beneficial embody dealing with meat slurry and mince, and processing yeast-malt extracts.
The hygienic design makes use of a patented stainless-steel scraping mechanism that strikes hydraulically backwards and forwards inside each inside tube. The movement performs two key capabilities: it minimizes potential fouling by preserving the tube wall clear and in addition creates turbulence within the materials. Together, these actions increase the speed of warmth switch in the material, making a extremely environment friendly course of that’s ideal for viscous and high fouling materials.
Since they’re controlled separately, the speed of the scrapers may be optimized for a specific product being processed, in order that materials which are vulnerable to shear stress or pressure damage (such as lotions and custards) may be handled delicately to prevent injury while nonetheless providing excessive ranges of warmth transfer. The Unicus Series has confirmed significantly useful in handling viscous food merchandise where texture and consistency are necessary attributes. For example, some creams or sauces could shear when subjected to extra stress, making them unusable. The Unicus means that efficient heat transfer may 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 energy pack (although in smaller models a pneumatic cylinder may be provided instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the warmth exchanger itself. The heat exchanger consists of a selection of tubes, each of which contains a stainless-steel rod to which the appropriate scraping parts are fitted. Using a range of food-safe supplies including Teflon and PEEK (polyether ether ketone), these present different inside geometry setups based on the applying, such as 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series is also fully scalable by rising the shell diameter and including extra interior tubes from a single tube up to eighty in a single shell. A key feature is the specially designed seals which separate the inner tube from the separation chamber, tailor-made to the product software. These seals prevent leakage of the product and ensure inner and exterior hygiene. A normal vary of models for food processing present warmth transfer areas from 7 to 107 square toes, while bigger models as much as almost 1,300 square toes could be made for particular uses.
EXCELLENCE IN ACTION
One area where the Unicus Series excels is in evaporation functions, the place the prevention of fouling is particularly important. HRS has a selected version of the Unicus to be used in evaporation units where volume reduction of the fabric is essential. The scraping action keeps the warmth 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 worldwide gross sales and marketing 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 know-how, providing progressive warmth transfer options worldwide across a various range of industries. With เกจวัดแรงดันน้ำ10บาร์ ’ expertise in the food and beverage sector, specializing within the design and manufacture of an intensive range of turnkey techniques and components, incorporating corrugated tubular, and scraped floor heat exchanger expertise, HRS models are compliant with international design and trade standards.For more info, go to www.hrs-heatexchangers.com.
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