Scraped surface warmth exchangers have been used for difficult warmth switch purposes involving viscous fluids or the place fouling is an issue, corresponding to evaporation processes. The most common sort of scraped surface warmth exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the floor of the tube. The popular HRS R Series relies on this method. However, the design just isn’t optimum for every scenario, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped surface warmth exchangers is good for viscous merchandise similar to cream and tomato juice, as well as products containing fruit pieces or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is particularly designed to supply the improved warmth transfer of a conventional SSHE, however with a mild action to preserve the quality and integrity of delicate meals products similar to cheese, yoghurt, ice cream, meat paste, and merchandise containing entire pieces of fruits or greens. Over the years, a selection of different scraper designs have been developed, which means that every utility, from processing curds to heating sauce or pasteurizing fruit compotes may be dealt with in essentially the most efficient but gentle means attainable. Other functions the place the Unicus Series has been useful embody 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 back and forth within every inside tube. The movement performs two key features: it minimizes potential fouling by preserving the tube wall clean and also creates turbulence throughout the materials. Together, these actions improve the rate of heat switch within the material, creating a extremely environment friendly course of that is ideal for viscous and excessive fouling materials.
Since they’re managed individually, the speed of the scrapers may be optimized for a particular product being processed, in order that materials which are prone to shear stress or pressure harm (such as lotions and custards) could be dealt with delicately to stop harm while still providing high ranges of warmth switch. The Unicus Series has confirmed significantly helpful in handling viscous meals products where texture and consistency are essential attributes. For instance, some creams or sauces may shear when subjected to excess stress, making them unusable. The Unicus means that effective warmth switch may be carried out at low pressures which overcomes these issues.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three elements: a hydraulic cylinder and energy pack (although in smaller models a pneumatic cylinder may be provided 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 number of tubes, every of which contains a stainless-steel rod to which the suitable scraping elements are fitted. Using a range of food-safe supplies including Teflon and PEEK (polyether ether ketone), these provide completely different internal geometry setups according to the applying, corresponding to 120-degree scrapers for giant particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series is also totally scalable by increasing the shell diameter and adding extra interior tubes from a single tube up to eighty in one shell. A key characteristic is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product utility. These seals forestall leakage of the product and guarantee inner and external hygiene. A commonplace vary of models for food processing provide heat transfer areas from 7 to 107 sq. feet, whereas larger fashions as much as practically 1,300 sq. ft could be made for specific makes use of.
EXCELLENCE IN ACTION
One space where the Unicus Series excels is in evaporation purposes, where the prevention of fouling is particularly important. HRS has a specific model of the Unicus for use in evaporation units the place volume reduction of the fabric is crucial. The scraping motion retains the heat transfer surfaces clear so that Unicus evaporators can focus supplies to a level that’s unattainable using conventional technologies. Unicus evaporators can be utilized in multi-effect setups or in combination with mechanical vapor recompression.
Matt Hale is international sales and marketing director for HRS Heat Exchangers. Located in pressure gauge หลักการ ทํา งาน , Georgia, HRS Heat Exchangers is a part of the HRS Group, which operates on the forefront of thermal technology, providing progressive warmth transfer options worldwide throughout a various vary of industries. With forty years’ experience within the food and beverage sector, specializing in the design and manufacture of an in depth range of turnkey systems and elements, incorporating corrugated tubular, and scraped surface warmth exchanger know-how, HRS models are compliant with world design and industry standards.For extra data, go to www.hrs-heatexchangers.com.
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