Scraped surface warmth exchangers have been used for troublesome heat transfer applications involving viscous fluids or the place fouling is a matter, such as evaporation processes. The commonest kind of scraped floor warmth exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the surface of the tube. The popular HRS R Series is based on this approach. However, the design just isn’t optimum for each situation, and so HRS developed the Unicus Series of reciprocating scraped surface heat exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is ideal for viscous products corresponding to cream and tomato juice, in addition to merchandise containing fruit items or particles.
IT STARTS WITH DESIGN
The HRS Unicus Series is specifically designed to offer the improved heat transfer of a conventional SSHE, but with a mild motion to protect the standard and integrity of delicate meals merchandise corresponding to cheese, yoghurt, ice cream, meat paste, and products containing complete pieces of fruits or greens. Over the years, a selection of completely different scraper designs have been developed, which means that each software, from processing curds to heating sauce or pasteurizing fruit compotes may be dealt with in essentially the most efficient yet mild way possible. Other purposes the place the Unicus Series has been beneficial embody dealing with meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses a patented stainless-steel scraping mechanism that strikes hydraulically forwards and backwards inside each inside tube. The motion performs two key features: it minimizes potential fouling by maintaining the tube wall clean and likewise creates turbulence throughout the materials. Together, these actions increase the rate of warmth switch within the materials, creating a highly environment friendly course of that’s perfect for viscous and high fouling supplies.
Since they’re managed individually, the pace of the scrapers may be optimized for a selected product being processed, so that supplies which are susceptible to shear stress or stress harm (such as lotions and custards) can be dealt with delicately to stop injury while still providing high ranges of heat switch. The Unicus Series has proven significantly useful in dealing with viscous meals merchandise where texture and consistency are necessary attributes. For instance, some creams or sauces could shear when subjected to excess stress, making them unusable. The Unicus signifies that effective heat switch could be carried out at low pressures which overcomes these problems.
HRS UNICUS SERIES UP CLOSE
Each Unicus SSHE consists of three parts: a hydraulic cylinder and power pack (although in smaller models a pneumatic cylinder could be provided instead), a separation chamber to ensure hygiene and preserve product separation from the motor, and the heat exchanger itself. The heat exchanger consists of a number of tubes, each of which accommodates 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 different inside geometry setups based on the applying, 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 growing the shell diameter and adding extra interior tubes from a single tube up to eighty in one 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 forestall leakage of the product and guarantee inside and exterior hygiene. A normal range of fashions for food processing provide heat switch areas from 7 to 107 square toes, whereas bigger fashions as a lot as practically 1,300 sq. feet may be made for particular makes use of.
EXCELLENCE IN ACTION
One space where the Unicus Series excels is in evaporation functions, the place the prevention of fouling is especially essential. HRS has a particular version of the Unicus for use in evaporation items the place volume reduction of the fabric is crucial. The scraping action keeps the heat transfer surfaces clean so that Unicus evaporators can focus supplies to a degree that is unattainable using traditional applied sciences. Unicus evaporators can be utilized in multi-effect setups or in combination with mechanical vapor recompression.
Matt Hale is international sales and marketing director for HRS Heat Exchangers. Located in เกจวัดแรงดันลมคือ , Georgia, HRS Heat Exchangers is a part of the HRS Group, which operates on the forefront of thermal know-how, providing innovative warmth switch 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 intensive range of turnkey methods and components, incorporating corrugated tubular, and scraped floor warmth exchanger know-how, HRS items are compliant with global design and trade standards.For extra data, go to www.hrs-heatexchangers.com.
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