Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor heat exchangers have been used for troublesome warmth switch applications involving viscous fluids or the place fouling is an issue, such as evaporation processes. The commonest type of scraped surface heat exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the floor of the tube. The well-liked HRS R Series relies on this strategy. However, the design isn’t optimum for every situation, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is right for viscous merchandise similar to cream and tomato juice, in addition to merchandise containing fruit pieces or particles.
The HRS Unicus Series is specifically designed to provide the improved warmth switch of a conventional SSHE, but with a delicate motion to preserve the quality and integrity of delicate food merchandise similar to cheese, yoghurt, ice cream, meat paste, and merchandise containing entire items of fruits or vegetables. Over the years, a selection of different scraper designs have been developed, that means that each utility, from processing curds to heating sauce or pasteurizing fruit compotes can be dealt with in probably the most efficient yet gentle way attainable. 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 every inside tube. The movement performs two key functions: it minimizes potential fouling by preserving the tube wall clear and also creates turbulence within the materials. Together, these actions increase the rate of heat switch in the materials, making a highly efficient course of that is ideal for viscous and excessive fouling supplies.
Since they’re controlled individually, the velocity of the scrapers could be optimized for a selected product being processed, in order that supplies that are vulnerable to shear stress or stress injury (such as lotions and custards) could be handled delicately to prevent injury while still offering excessive levels of warmth switch. The Unicus Series has confirmed particularly useful in dealing with viscous food products where texture and consistency are essential attributes. For instance, some lotions or sauces could shear when subjected to excess stress, making them unusable. The Unicus implies that efficient warmth switch can be carried out at low pressures which overcomes these problems.
Each Unicus SSHE consists of three components: a hydraulic cylinder and energy pack (although in smaller units a pneumatic cylinder may be supplied instead), a separation chamber to make sure hygiene and protect product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of a selection of tubes, each of which accommodates a stainless-steel rod to which the suitable scraping components are fitted. Using a variety of food-safe materials including Teflon and PEEK (polyether ether ketone), these present completely different inside geometry setups in accordance with the applying, similar to 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can be totally scalable by rising the shell diameter and adding extra inside tubes from a single tube up to eighty in a single shell. A key characteristic is the specially designed seals which separate the inside tube from the separation chamber, tailored to the product utility. These seals prevent leakage of the product and guarantee internal and exterior hygiene. A normal vary of models for food processing provide warmth switch areas from 7 to 107 sq. feet, while larger models as a lot as almost 1,300 square ft could be made for particular makes use of.
One area where the Unicus Series excels is in evaporation purposes, the place the prevention of fouling is especially necessary. HRS has pressure gauge selected model of the Unicus for use in evaporation units where quantity discount of the fabric is important. The scraping action retains the warmth switch surfaces clear so that Unicus evaporators can concentrate materials to a level that’s unattainable using traditional applied sciences. Unicus evaporators 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 part of the HRS Group, which operates on the forefront of thermal technology, providing innovative warmth switch solutions worldwide across a diverse vary of industries. With forty years’ experience within the meals and beverage sector, specializing in the design and manufacture of an extensive range of turnkey techniques and components, incorporating corrugated tubular, and scraped surface heat exchanger know-how, HRS models are compliant with global design and trade requirements.For extra data, visit

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