Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor warmth exchangers have been used for difficult heat transfer applications involving viscous fluids or where fouling is a matter, such as evaporation processes. The commonest kind of scraped floor heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. The popular HRS R Series is predicated on this method. However, the design just isn’t optimum for every scenario, and so HRS developed the Unicus Series of reciprocating scraped floor heat exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is right for viscous merchandise similar to cream and tomato juice, as well as merchandise containing fruit items or particles.

The HRS Unicus Series is specifically designed to provide the improved heat switch of a standard SSHE, but with a mild motion to protect the quality and integrity of delicate meals products similar to cheese, yoghurt, ice cream, meat paste, and products containing complete pieces of fruits or greens. Over the years, a number of completely different scraper designs have been developed, which means that every utility, from processing curds to heating sauce or pasteurizing fruit compotes can be handled in probably the most efficient but light method potential. Other applications the place the Unicus Series has been beneficial embrace handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design makes use of a patented stainless-steel scraping mechanism that moves hydraulically back and forth inside each inside tube. The motion performs two key capabilities: it minimizes potential fouling by keeping the tube wall clean and in addition creates turbulence within the materials. Together, these actions enhance the rate of warmth transfer within the material, creating a extremely environment friendly process that’s best for viscous and high fouling supplies.
Since they are managed separately, the velocity of the scrapers can be optimized for a selected product being processed, so that supplies which are susceptible to shear stress or pressure harm (such as creams and custards) could be dealt with delicately to prevent injury while nonetheless offering excessive ranges of heat transfer. The Unicus Series has proven particularly helpful in dealing with viscous food products where texture and consistency are essential attributes. For example, some creams or sauces may shear when subjected to extra pressure, making them unusable. The Unicus means that efficient heat transfer may be carried out at low pressures which overcomes these problems.

Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller models a pneumatic cylinder could be supplied instead), a separation chamber to make sure hygiene and preserve product separation from the motor, and the warmth exchanger itself. The heat exchanger consists of a quantity of tubes, every of which contains a stainless-steel rod to which the appropriate scraping parts are fitted. Using a range of food-safe supplies including Teflon and PEEK (polyether ether ketone), these provide completely different inner geometry setups based on the appliance, corresponding to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can be fully scalable by growing the shell diameter and including extra interior tubes from a single tube as much as eighty in a single shell. A key characteristic is the specifically designed seals which separate the internal tube from the separation chamber, tailor-made to the product utility. pressure gauge prevent leakage of the product and ensure inside and external hygiene. A normal range of models for meals processing present heat transfer areas from 7 to 107 sq. feet, whereas bigger fashions as much as almost 1,300 sq. feet could be made for particular uses.

One area where the Unicus Series excels is in evaporation applications, where the prevention of fouling is particularly essential. HRS has a selected version of the Unicus for use in evaporation models the place volume discount of the fabric is essential. The scraping motion keeps the heat switch surfaces clean in order that Unicus evaporators can focus supplies to a degree that is unattainable utilizing conventional technologies. Unicus evaporators can be used in multi-effect setups or in combination 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 half of the HRS Group, which operates on the forefront of thermal expertise, providing revolutionary heat transfer solutions worldwide throughout a various vary of industries. With forty years’ experience in the meals and beverage sector, specializing in the design and manufacture of an intensive vary of turnkey methods and components, incorporating corrugated tubular, and scraped floor warmth exchanger know-how, HRS units are compliant with world design and trade standards.For extra info, visit

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