Scraped surface heat exchangers have been used for troublesome heat switch purposes involving viscous fluids or where fouling is an issue, similar 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. The well-liked HRS R Series is predicated on this strategy. However, the design 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 ideal for viscous merchandise corresponding 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 heat switch of a traditional SSHE, however with a delicate motion to protect the quality and integrity of delicate meals products corresponding to cheese, yoghurt, ice cream, meat paste, and products containing whole pieces of fruits or greens. Over the years, a selection of totally different scraper designs have been developed, meaning that every software, from processing curds to heating sauce or pasteurizing fruit compotes could be handled in essentially the most efficient but light method possible. เกจวัดแรงดันแก๊สco2 has been useful 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 moves hydraulically backwards and forwards inside every inside tube. The motion performs two key features: it minimizes potential fouling by keeping the tube wall clean and also creates turbulence throughout the material. Together, these actions improve the speed of warmth switch within the material, creating a extremely efficient process that’s perfect for viscous and high fouling materials.
Since they are managed separately, the speed of the scrapers can be optimized for a selected product being processed, in order that materials that are vulnerable to shear stress or strain harm (such as lotions and custards) could be handled delicately to forestall harm whereas nonetheless providing excessive ranges of heat switch. The Unicus Series has confirmed significantly useful in dealing with viscous food products where texture and consistency are necessary attributes. For instance, some lotions or sauces may shear when subjected to excess pressure, making them unusable. The Unicus means that effective warmth transfer may 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 provided instead), a separation chamber to make sure hygiene and protect product separation from the motor, and the warmth exchanger itself. The warmth exchanger consists of a number of tubes, every of which accommodates a stainless-steel rod to which the suitable scraping components are fitted. Using a range of food-safe materials including Teflon and PEEK (polyether ether ketone), these present different internal geometry setups based on the appliance, corresponding to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can additionally be totally scalable by growing the shell diameter and adding more inside tubes from a single tube as a lot as eighty in a single shell. A key feature is the specifically designed seals which separate the inside tube from the separation chamber, tailor-made to the product software. These seals forestall leakage of the product and ensure inside and exterior hygiene. A standard range of models for food processing present heat transfer areas from 7 to 107 square toes, whereas bigger models up to almost 1,300 square toes may be made for particular makes use of.
EXCELLENCE IN ACTION
One space the place the Unicus Series excels is in evaporation applications, the place the prevention of fouling is especially necessary. HRS has a selected model of the Unicus to be used in evaporation units the place volume reduction of the fabric is essential. The scraping action keeps the heat transfer surfaces clean so that Unicus evaporators can focus materials to a level that’s unattainable utilizing conventional applied sciences. Unicus evaporators can be utilized 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 part of the HRS Group, which operates at the forefront of thermal technology, offering progressive warmth switch options worldwide throughout a diverse range of industries. With forty years’ experience in the food and beverage sector, specializing in the design and manufacture of an in depth range of turnkey methods and parts, incorporating corrugated tubular, and scraped surface warmth exchanger know-how, HRS units are compliant with world design and industry requirements.For extra data, visit www.hrs-heatexchangers.com.
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