Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface heat exchangers have been used for difficult warmth switch functions involving viscous fluids or the place fouling is an issue, such as evaporation processes. The commonest sort of scraped surface heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. The in style HRS R Series is based 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.
pressure gauge of reciprocating scraped surface warmth exchangers is ideal for viscous products such as cream and tomato juice, in addition to products containing fruit pieces or particles.

The HRS Unicus Series is specifically designed to provide the improved warmth transfer of a conventional SSHE, however with a gentle action to protect the quality and integrity of delicate food merchandise such as cheese, yoghurt, ice cream, meat paste, and products containing entire items of fruits or vegetables. Over the years, a quantity of different scraper designs have been developed, that means that every software, from processing curds to heating sauce or pasteurizing fruit compotes could be dealt with in the most efficient but light way possible. Other functions the place the Unicus Series has been beneficial include dealing with meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses 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 clean and likewise creates turbulence inside the materials. Together, these actions improve the rate of warmth transfer in the materials, creating a highly efficient process that is ideal for viscous and high fouling materials.
Since they’re controlled individually, the velocity of the scrapers may be optimized for a specific product being processed, so that supplies which are susceptible to shear stress or strain harm (such as creams and custards) can be handled delicately to stop harm whereas still providing excessive levels of heat switch. The Unicus Series has proven particularly helpful in dealing with viscous food merchandise where texture and consistency are essential attributes. For example, some creams or sauces may shear when subjected to excess strain, making them unusable. The Unicus implies that efficient heat transfer could be carried out at low pressures which overcomes these issues.

Each Unicus SSHE consists of three parts: a hydraulic cylinder and energy pack (although in smaller items a pneumatic cylinder may be provided instead), a separation chamber to ensure hygiene and protect product separation from the motor, and the warmth exchanger itself. The warmth exchanger consists of a variety of tubes, each of which accommodates a stainless-steel rod to which the suitable scraping parts are fitted. Using a spread of food-safe materials together with Teflon and PEEK (polyether ether ketone), these provide completely different inside geometry setups according to the application, 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 rising the shell diameter and including extra interior tubes from a single tube up to eighty in one shell. A key function is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product software. These seals prevent leakage of the product and ensure inner and external hygiene. A standard vary of models for food processing provide warmth transfer areas from 7 to 107 sq. feet, whereas bigger fashions as much as almost 1,300 square feet could be made for specific uses.

One area the place the Unicus Series excels is in evaporation applications, where the prevention of fouling is particularly necessary. HRS has a specific version of the Unicus to be used in evaporation units the place quantity discount of the material is essential. The scraping action retains the warmth switch surfaces clean so that Unicus evaporators can focus materials to a level that’s unattainable using traditional technologies. Unicus evaporators can be utilized in multi-effect setups or together with mechanical vapor recompression.
Matt Hale is worldwide gross sales and marketing director for HRS Heat Exchangers. Located in Atlanta, Georgia, HRS Heat Exchangers is a part of the HRS Group, which operates at the forefront of thermal technology, offering revolutionary heat transfer solutions worldwide across a diverse range of industries. With forty years’ experience within the food and beverage sector, specializing within the design and manufacture of an intensive range of turnkey techniques and components, incorporating corrugated tubular, and scraped surface warmth exchanger expertise, HRS units are compliant with world design and trade standards.For more information, go to

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