Scraped surface heat exchangers have been used for tough warmth transfer purposes involving viscous fluids or where fouling is a matter, corresponding to evaporation processes. The most common type of scraped surface warmth exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the surface of the tube. The in style HRS R Series is based on this approach. However, the design just isn’t optimum for each scenario, and so HRS developed the Unicus Series of reciprocating scraped surface warmth exchangers.
The Unicus Series of reciprocating scraped surface heat exchangers is ideal for viscous products such as cream and tomato juice, as properly as merchandise containing fruit pieces or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is specifically designed to provide the improved heat switch of a standard SSHE, however with a mild motion to preserve the standard and integrity of delicate meals merchandise similar to cheese, yoghurt, ice cream, meat paste, and merchandise containing complete pieces of fruits or greens. Over the years, a number of different scraper designs have been developed, that means that each application, from processing curds to heating sauce or pasteurizing fruit compotes may be handled in essentially the most environment friendly yet light method attainable. Other applications the place the Unicus Series has been useful embody handling 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 every inside tube. The movement performs two key functions: it minimizes potential fouling by maintaining the tube wall clean and in addition creates turbulence inside the material. Together, these actions enhance the speed of heat switch in the material, creating a extremely environment friendly process that’s ideal for viscous and high fouling supplies.
Since they’re managed individually, the speed of the scrapers could be optimized for a specific product being processed, in order that materials that are prone to shear stress or stress injury (such as creams and custards) can be dealt with delicately to stop injury whereas still providing excessive levels of heat switch. The Unicus Series has confirmed notably helpful in dealing with viscous meals products where texture and consistency are important attributes. For example, some lotions or sauces could shear when subjected to excess pressure, making them unusable. The Unicus implies that effective warmth transfer could be carried out at low pressures which overcomes these issues.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller items a pneumatic cylinder can be provided instead), a separation chamber to make sure hygiene and preserve product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of a number of tubes, each of which contains a stainless-steel rod to which the suitable scraping components are fitted. Using a spread of food-safe materials together with Teflon and PEEK (polyether ether ketone), these present totally different inner geometry setups based on the application, similar to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can be fully scalable by increasing the shell diameter and including extra inside tubes from a single tube as much as eighty in a single shell. A key function is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product utility. These seals prevent leakage of the product and ensure inner and external hygiene. A normal vary of models for food processing present heat transfer areas from 7 to 107 sq. feet, while larger models as a lot as nearly 1,300 sq. ft could be made for particular uses.
EXCELLENCE IN ACTION
One area where the Unicus Series excels is in evaporation functions, the place the prevention of fouling is particularly essential. HRS has a specific model of the Unicus to be used in evaporation units where quantity discount of the fabric is important. The scraping action retains the warmth switch surfaces clean so that Unicus evaporators can focus supplies to a degree that’s unattainable using traditional applied sciences. pressure gauge ราคา can be used in multi-effect setups or in combination with mechanical vapor recompression.
Matt Hale is international sales and advertising 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, providing innovative heat transfer solutions worldwide across a various range of industries. With forty years’ expertise within the food and beverage sector, specializing in the design and manufacture of an in depth range of turnkey techniques and parts, incorporating corrugated tubular, and scraped floor warmth exchanger technology, HRS units are compliant with global design and trade requirements.For more information, go to www.hrs-heatexchangers.com.
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