Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor warmth exchangers have been used for difficult heat switch applications involving viscous fluids or the place fouling is a matter, similar to evaporation processes. The most typical type of scraped surface heat exchanger (SSHE) uses 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 each 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 products corresponding to cream and tomato juice, as nicely as 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 mild motion to preserve the standard and integrity of delicate food merchandise such as cheese, yoghurt, ice cream, meat paste, and products containing entire pieces of fruits or greens. Over the years, a variety of totally different scraper designs have been developed, that means that every application, from processing curds to heating sauce or pasteurizing fruit compotes could be dealt with in essentially the most environment friendly yet light method attainable. Other purposes where the Unicus Series has been useful include dealing with 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 interior tube. The motion performs two key functions: it minimizes potential fouling by maintaining the tube wall clear and in addition creates turbulence throughout the materials. Together, these actions enhance the rate of warmth switch in the material, creating a highly environment friendly process that’s best for viscous and high fouling supplies.
Since they are controlled individually, the velocity of the scrapers can be optimized for a specific product being processed, so that materials that are vulnerable to shear stress or stress injury (such as creams and custards) can be dealt with delicately to prevent damage while still providing excessive levels of warmth transfer. The Unicus Series has proven significantly helpful in handling viscous meals merchandise the place texture and consistency are necessary attributes. For instance, some creams or sauces could shear when subjected to extra pressure, making them unusable. The Unicus means that effective warmth transfer can be carried out at low pressures which overcomes these problems.
Each Unicus SSHE consists of three elements: a hydraulic cylinder and power pack (although in smaller units a pneumatic cylinder can be equipped 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 variety of tubes, every of which incorporates a stainless-steel rod to which the appropriate scraping parts are fitted. Using a range of food-safe materials including Teflon and PEEK (polyether ether ketone), these provide completely different inside geometry setups according to the applying, such as 120-degree scrapers for giant particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can additionally be fully scalable by rising the shell diameter and including more interior tubes from a single tube up to eighty in a single shell. A key feature is the specifically designed seals which separate the inside tube from the separation chamber, tailored to the product application. These seals forestall leakage of the product and guarantee inside and exterior hygiene. Approved of fashions for meals processing provide warmth switch areas from 7 to 107 square toes, whereas larger models up to practically 1,300 sq. ft may be made for specific makes use of.
One area where the Unicus Series excels is in evaporation purposes, where the prevention of fouling is especially necessary. HRS has a particular model of the Unicus to be used in evaporation models where volume reduction of the fabric is important. The scraping action keeps the warmth transfer surfaces clean in order that Unicus evaporators can concentrate materials to a level that is unattainable utilizing conventional applied sciences. 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 a half of the HRS Group, which operates on the forefront of thermal expertise, providing progressive heat switch options worldwide throughout a various range of industries. With forty years’ expertise in the food and beverage sector, specializing in the design and manufacture of an intensive range of turnkey methods and components, incorporating corrugated tubular, and scraped surface warmth exchanger expertise, HRS models are compliant with world design and business standards.For more information, go to

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