Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor heat exchangers have been used for difficult warmth transfer applications involving viscous fluids or where fouling is an issue, such as evaporation processes. The most common kind 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 method. However, pressure gauge octa is not optimum for every state of affairs, and so HRS developed the Unicus Series of reciprocating scraped floor heat exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is good for viscous merchandise corresponding to cream and tomato juice, as properly as merchandise containing fruit pieces or particles.

The HRS Unicus Series is specifically designed to supply the improved heat transfer of a traditional SSHE, but with a gentle action to protect the standard and integrity of delicate food products such as cheese, yoghurt, ice cream, meat paste, and products containing entire pieces of fruits or vegetables. Over the years, a quantity of completely different scraper designs have been developed, meaning that each software, from processing curds to heating sauce or pasteurizing fruit compotes could be dealt with in the most efficient but mild method potential. Other applications the place the Unicus Series has been beneficial embody 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 forwards and backwards within every inside tube. The motion performs two key features: it minimizes potential fouling by keeping the tube wall clean and also creates turbulence inside the materials. Together, these actions improve the speed of heat switch within the material, creating a extremely environment friendly course of that is ideal for viscous and excessive fouling supplies.
Since they are controlled separately, the pace of the scrapers could be optimized for a selected product being processed, so that materials which are vulnerable to shear stress or stress injury (such as creams and custards) could be handled delicately to prevent harm while nonetheless offering high levels of warmth transfer. The Unicus Series has confirmed notably helpful in handling viscous meals merchandise where texture and consistency are necessary attributes. For instance, some lotions or sauces may shear when subjected to excess pressure, making them unusable. The Unicus means that efficient warmth transfer can be carried out at low pressures which overcomes these problems.

Each Unicus SSHE consists of three parts: a hydraulic cylinder and power pack (although in smaller units a pneumatic cylinder could be supplied instead), a separation chamber to make sure hygiene and protect product separation from the motor, and the warmth exchanger itself. The heat exchanger consists of a number of tubes, each of which incorporates a stainless-steel rod to which the appropriate scraping parts are fitted. Using a range of food-safe materials together with Teflon and PEEK (polyether ether ketone), these provide totally different inside geometry setups based on the application, 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 increasing the shell diameter and including more inside tubes from a single tube up to eighty in a single shell. A key characteristic is the specifically designed seals which separate the internal tube from the separation chamber, tailored to the product utility. These seals forestall leakage of the product and guarantee inner and exterior hygiene. A commonplace range of models for food processing present warmth switch areas from 7 to 107 square feet, whereas bigger models up to practically 1,300 square ft can be made for specific uses.

One area the place the Unicus Series excels is in evaporation functions, where the prevention of fouling is particularly essential. HRS has a selected version of the Unicus for use in evaporation models where volume discount of the fabric is important. The scraping action keeps the warmth transfer surfaces clean so that Unicus evaporators can concentrate materials to a level that’s unattainable utilizing traditional applied sciences. Unicus evaporators can be utilized in multi-effect setups or in combination 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 on the forefront of thermal know-how, providing progressive warmth switch solutions 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 in depth vary of turnkey techniques and elements, incorporating corrugated tubular, and scraped surface warmth exchanger know-how, HRS models are compliant with world design and industry requirements.For extra information, visit

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