Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor warmth exchangers have been used for tough warmth switch applications involving viscous fluids or where fouling is a matter, similar to evaporation processes. The most common 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 popular HRS R Series is based on this method. However, the design isn’t optimal for every state of affairs, and so HRS developed the Unicus Series of reciprocating scraped surface warmth exchangers.
The Unicus Series of reciprocating scraped floor warmth exchangers is right for viscous merchandise corresponding to cream and tomato juice, in addition to merchandise containing fruit pieces or particles.
Save is specifically designed to supply the improved heat transfer of a standard SSHE, but with a mild action to protect the quality and integrity of delicate food merchandise such as cheese, yoghurt, ice cream, meat paste, and merchandise containing complete pieces of fruits or vegetables. Over the years, a selection of totally different scraper designs have been developed, meaning that every application, from processing curds to heating sauce or pasteurizing fruit compotes may be handled in essentially the most environment friendly but gentle method potential. Other applications the place the Unicus Series has been useful embrace 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 inside each inside tube. The movement performs two key functions: it minimizes potential fouling by keeping the tube wall clear and also creates turbulence within the material. Together, these actions enhance the speed of heat switch in the material, making a extremely environment friendly process that’s best for viscous and excessive fouling supplies.
Since they are controlled individually, the velocity of the scrapers could be optimized for a selected product being processed, so that materials that are vulnerable to shear stress or pressure injury (such as lotions and custards) could be handled delicately to stop damage whereas nonetheless providing excessive levels of warmth switch. The Unicus Series has confirmed notably useful in dealing with viscous meals products where texture and consistency are important attributes. For instance, some creams or sauces may shear when subjected to excess stress, making them unusable. The Unicus signifies that efficient warmth transfer can be carried out at low pressures which overcomes these problems.
Each Unicus SSHE consists of three elements: a hydraulic cylinder and energy pack (although in smaller items a pneumatic cylinder could be supplied instead), a separation chamber to make sure hygiene and preserve product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of a quantity of tubes, each of which contains 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 present completely different internal geometry setups according to the appliance, corresponding to 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series is also fully scalable by increasing the shell diameter and adding more inside tubes from a single tube up to eighty in one shell. A key feature is the specially designed seals which separate the internal tube from the separation chamber, tailor-made to the product utility. These seals stop leakage of the product and guarantee inside and external hygiene. A normal range of models for food processing present warmth switch areas from 7 to 107 sq. toes, whereas larger fashions up to practically 1,300 sq. ft could be made for specific uses.
One space where the Unicus Series excels is in evaporation applications, where the prevention of fouling is particularly essential. HRS has a particular version of the Unicus to be used in evaporation models where volume reduction of the fabric is essential. The scraping motion keeps the heat switch surfaces clear in order that Unicus evaporators can focus supplies to a degree 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 advertising director for HRS Heat Exchangers. Located in Atlanta, Georgia, HRS Heat Exchangers is part of the HRS Group, which operates on the forefront of thermal expertise, offering revolutionary warmth switch options worldwide throughout a various vary of industries. With forty years’ expertise within the food and beverage sector, specializing in the design and manufacture of an intensive vary of turnkey systems and components, incorporating corrugated tubular, and scraped surface heat exchanger expertise, HRS items are compliant with world design and business requirements.For more information, visit

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