Scraped surface heat exchangers have been used for troublesome heat switch purposes involving viscous fluids or the place fouling is an issue, corresponding to evaporation processes. The commonest sort of scraped floor warmth exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the floor of the tube. The in style HRS R Series relies on this method. However, the design isn’t optimum for every situation, and so HRS developed the Unicus Series of reciprocating scraped surface warmth exchangers.
The Unicus Series of reciprocating scraped surface heat exchangers is good for viscous merchandise such as cream and tomato juice, as nicely as products containing fruit pieces or particles.
The HRS Unicus Series is specifically designed to offer the improved heat switch of a standard SSHE, but with a gentle action to protect the standard and integrity of delicate food merchandise such as cheese, yoghurt, ice cream, meat paste, and products containing entire pieces of fruits or vegetables. Over the years, numerous 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 yet light way possible. Other functions the place the Unicus Series has been useful embrace 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 each inside tube. The motion performs two key features: it minimizes potential fouling by preserving the tube wall clear and in addition creates turbulence within the material. Together, these actions enhance the rate of warmth switch within the material, creating a highly environment friendly process that’s ideal for viscous and high fouling supplies.
Since they are managed separately, the velocity of the scrapers may be optimized for a particular product being processed, in order that supplies which are susceptible to shear stress or strain injury (such as lotions and custards) could be dealt with delicately to prevent injury whereas nonetheless providing high levels of warmth switch. The Unicus Series has proven significantly useful in handling viscous food products 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 implies that effective warmth transfer can be carried out at low pressures which overcomes these issues.
Each Unicus SSHE consists of three elements: a hydraulic cylinder and energy pack (although in smaller items a pneumatic cylinder may be provided instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the warmth exchanger itself. The warmth exchanger consists of a selection of tubes, every of which incorporates a stainless-steel rod to which the suitable scraping parts are fitted. Using เกจวัดแรงดันดิจิตอลราคา of food-safe materials together with Teflon and PEEK (polyether ether ketone), these present totally different internal geometry setups according to the application, similar to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can also be fully scalable by growing the shell diameter and adding more interior tubes from a single tube up to eighty in one shell. A key characteristic is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product application. These seals stop leakage of the product and guarantee inside and external hygiene. A standard vary of fashions for food processing present warmth switch areas from 7 to 107 sq. toes, whereas bigger fashions up to nearly 1,300 sq. feet could be made for specific makes use of.
One area the place the Unicus Series excels is in evaporation applications, where the prevention of fouling is especially necessary. HRS has a specific model of the Unicus to be used in evaporation items the place volume discount of the fabric is important. The scraping motion keeps the warmth switch surfaces clean in order that Unicus evaporators can concentrate supplies to a stage that is unattainable utilizing conventional applied sciences. Unicus evaporators can be utilized in multi-effect setups or together with mechanical vapor recompression.
Matt Hale is worldwide 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 technology, offering revolutionary heat switch options worldwide throughout a various range of industries. With forty years’ expertise within the food and beverage sector, specializing within the design and manufacture of an intensive vary of turnkey systems and parts, incorporating corrugated tubular, and scraped surface heat exchanger know-how, HRS items are compliant with global design and business requirements.For extra information, go to