Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface warmth exchangers have been used for difficult heat transfer functions involving viscous fluids or where fouling is a matter, such as evaporation processes. The most typical type of scraped floor warmth exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the surface of the tube. The in style HRS R Series relies on this strategy. However, the design just isn’t optimum for every state of affairs, 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, in addition to merchandise containing fruit pieces or particles.
The HRS Unicus Series is particularly designed to supply the improved warmth switch of a traditional SSHE, however with a gentle action to protect the standard and integrity of delicate food products similar to cheese, yoghurt, ice cream, meat paste, and products containing whole pieces of fruits or greens. Over the years, a variety of different scraper designs have been developed, meaning that every application, from processing curds to heating sauce or pasteurizing fruit compotes could be handled in the most environment friendly but mild method possible. Other functions where the Unicus Series has been beneficial 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 each interior tube. The motion performs two key capabilities: it minimizes potential fouling by keeping the tube wall clear and also creates turbulence within the material. Together, these actions improve the rate of warmth transfer within the materials, creating a highly efficient process that’s perfect for viscous and high fouling supplies.
Since they are managed individually, the velocity of the scrapers may be optimized for a particular product being processed, so that materials that are prone to shear stress or stress damage (such as creams and custards) could be dealt with delicately to stop injury whereas nonetheless providing excessive levels of heat transfer. The Unicus Series has proven notably useful in handling viscous food products where texture and consistency are essential attributes. For example, some lotions or sauces may shear when subjected to excess pressure, making them unusable. The Unicus means that effective heat transfer can be carried out at low pressures which overcomes these issues.
Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller models a pneumatic cylinder could be provided instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of numerous tubes, every of which accommodates a stainless-steel rod to which the appropriate scraping elements are fitted. Using a range of food-safe materials together with Teflon and PEEK (polyether ether ketone), these present different internal geometry setups in accordance with the application, such as 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can be totally scalable by growing the shell diameter and adding more inside tubes from a single tube as a lot as eighty in one shell. A key feature is the specially designed seals which separate the inside tube from the separation chamber, tailor-made to the product application. These seals forestall leakage of the product and ensure inner and external hygiene. A standard range of models for meals processing present heat transfer areas from 7 to 107 sq. ft, whereas larger fashions up to nearly 1,300 sq. toes could be made for particular uses.
One space the place the Unicus Series excels is in evaporation purposes, the place the prevention of fouling is especially essential. HRS has a specific version of the Unicus to be used in evaporation items the place quantity reduction of the fabric is important. The scraping motion keeps the heat switch surfaces clean in order that Unicus evaporators can focus materials to a level that’s unattainable using conventional technologies. pressure gauge 4 นิ้ว can be utilized in multi-effect setups or together with mechanical vapor recompression.
Matt Hale is international 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 technology, offering revolutionary heat switch solutions worldwide throughout a diverse 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 parts, incorporating corrugated tubular, and scraped floor warmth exchanger know-how, HRS units are compliant with global design and trade standards.For more information, visit

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