Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface heat exchangers have been used for tough heat transfer functions involving viscous fluids or where fouling is a matter, corresponding to evaporation processes. The most common sort of scraped floor warmth exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. The popular HRS R Series relies on this strategy. However, the design is not optimum for each situation, 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 products such as cream and tomato juice, in addition to merchandise containing fruit pieces or particles.
The HRS Unicus Series is particularly designed to provide the improved warmth switch of a conventional SSHE, but with a delicate action to preserve the quality and integrity of delicate meals merchandise corresponding to cheese, yoghurt, ice cream, meat paste, and products containing entire items of fruits or vegetables. Over the years, numerous different scraper designs have been developed, meaning that every software, from processing curds to heating sauce or pasteurizing fruit compotes may be handled in essentially the most environment friendly but gentle means possible. Other applications where the Unicus Series has been useful embody dealing with meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses a patented stainless-steel scraping mechanism that strikes hydraulically forwards and backwards within each interior tube. The motion performs two key features: it minimizes potential fouling by maintaining the tube wall clean and in addition creates turbulence within the materials. Together, these actions enhance the speed of heat switch in the materials, making a extremely environment friendly course of that is perfect for viscous and excessive fouling supplies.
Since they are managed separately, the speed of the scrapers could be optimized for a specific product being processed, in order that materials which are prone to shear stress or stress damage (such as lotions and custards) can be handled delicately to forestall harm whereas nonetheless providing excessive levels of warmth switch. The Unicus Series has confirmed significantly useful in handling viscous meals merchandise the place texture and consistency are important attributes. For example, some lotions or sauces might shear when subjected to extra strain, making them unusable. The Unicus means that effective warmth 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 items a pneumatic cylinder may be supplied instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the warmth exchanger itself. The warmth exchanger consists of a quantity of tubes, every of which contains a stainless-steel rod to which the suitable scraping elements are fitted. Using a variety of food-safe supplies together with Teflon and PEEK (polyether ether ketone), these present totally different inner geometry setups based on the applying, corresponding to 120-degree scrapers for big 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 inside tubes from a single tube as a lot as eighty in a single shell. A key function is the specially designed seals which separate the internal tube from the separation chamber, tailor-made to the product application. These seals stop leakage of the product and ensure inside and exterior hygiene. A normal range of models for meals processing present warmth transfer areas from 7 to 107 square feet, while bigger models up to nearly 1,300 sq. ft could be made for specific uses.
One area where the Unicus Series excels is in evaporation purposes, where the prevention of fouling is particularly necessary. HRS has a specific model of the Unicus to be used in evaporation models where volume discount of the material is essential. Cash scraping motion keeps the warmth switch surfaces clean so that Unicus evaporators can focus materials to a degree that’s unattainable utilizing conventional technologies. Unicus evaporators can be utilized in multi-effect setups or together with mechanical vapor recompression.
Matt Hale is worldwide gross sales and advertising director for HRS Heat Exchangers. Located in Atlanta, Georgia, HRS Heat Exchangers is a half of the HRS Group, which operates at the forefront of thermal know-how, providing progressive heat transfer options worldwide across a various vary of industries. With forty years’ expertise in 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 expertise, HRS models are compliant with global design and business requirements.For more information, go to

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