Scraped floor warmth exchangers have been used for tough heat switch functions involving viscous fluids or the place fouling is an issue, similar to evaporation processes. The most typical kind of scraped surface heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. The popular HRS R Series relies on this strategy. However, the design just isn’t optimal for every scenario, and so HRS developed the Unicus Series of reciprocating scraped surface warmth exchangers.
The Unicus Series of reciprocating scraped surface warmth exchangers is ideal for viscous products such as cream and tomato juice, as nicely as products containing fruit items or particles.
The HRS Unicus Series is particularly designed to supply the improved heat transfer of a traditional SSHE, but with a gentle action to protect the quality and integrity of delicate food merchandise corresponding to cheese, yoghurt, ice cream, meat paste, and merchandise containing whole pieces of fruits or vegetables. Over the years, numerous totally different scraper designs have been developed, meaning that each utility, from processing curds to heating sauce or pasteurizing fruit compotes can be handled in probably the most environment friendly yet light way attainable. Other purposes the place the Unicus Series has been useful include 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 interior tube. The movement performs two key functions: it minimizes potential fouling by preserving the tube wall clean and likewise creates turbulence within the material. Together, these actions improve the rate of heat switch in the material, creating a extremely efficient process that’s perfect for viscous and high fouling supplies.
Since they’re managed separately, the pace of the scrapers can be optimized for a particular product being processed, in order that supplies which are vulnerable to shear stress or stress harm (such as lotions and custards) can be dealt with delicately to stop damage whereas nonetheless providing high levels of heat switch. The Unicus Series has proven notably helpful in handling viscous food merchandise where texture and consistency are necessary attributes. For example, some creams or sauces could shear when subjected to extra pressure, making them unusable. The Unicus means that effective 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 units a pneumatic cylinder can be provided instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the warmth exchanger itself. The heat exchanger consists of a variety of tubes, every of which contains a stainless-steel rod to which the appropriate scraping parts are fitted. Using a variety of food-safe materials together with Teflon and PEEK (polyether ether ketone), these provide totally different inside geometry setups according to the applying, such as 120-degree scrapers for large particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can be fully scalable by increasing the shell diameter and including more inside tubes from a single tube as much as eighty in a single shell. A key function is the specifically designed seals which separate the inner tube from the separation chamber, tailored to the product utility. These seals stop leakage of the product and ensure inside and external hygiene. A normal range of models for food processing present heat switch areas from 7 to 107 sq. ft, whereas larger fashions up to nearly 1,300 sq. feet could be made for particular makes use of.
One space the place the Unicus Series excels is in evaporation purposes, the place the prevention of fouling is particularly essential. HRS has เครื่องมือตรวจวัดความดันเลือดเรียกว่า of the Unicus to be used in evaporation units the place quantity discount of the material is essential. The scraping action keeps the warmth switch surfaces clear in order that Unicus evaporators can focus materials to a level that is unattainable using traditional applied sciences. Unicus evaporators can be used 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 part of the HRS Group, which operates on the forefront of thermal expertise, offering revolutionary heat transfer solutions worldwide across a diverse 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 techniques and components, incorporating corrugated tubular, and scraped surface heat exchanger technology, HRS units are compliant with global design and business requirements.For extra info, go to