Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped floor heat exchangers have been used for troublesome heat transfer purposes involving viscous fluids or the place fouling is an issue, similar to evaporation processes. The commonest type of scraped surface heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the floor of the tube. Painless is predicated on this approach. However, the design isn’t optimal for each scenario, and so HRS developed the Unicus Series of reciprocating scraped floor warmth exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is right for viscous merchandise corresponding to cream and tomato juice, as properly as merchandise containing fruit pieces or particles.
The HRS Unicus Series is particularly designed to supply the improved warmth switch of a traditional SSHE, but with a delicate motion to protect the standard and integrity of delicate meals products such as cheese, yoghurt, ice cream, meat paste, and products containing complete items of fruits or vegetables. Over the years, numerous completely different scraper designs have been developed, which means that every utility, from processing curds to heating sauce or pasteurizing fruit compotes can be dealt with in essentially the most efficient but mild method potential. Other applications where the Unicus Series has been helpful embody 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 inside tube. The motion performs two key features: it minimizes potential fouling by keeping the tube wall clean and in addition creates turbulence throughout the material. Together, these actions improve the speed of heat switch within the material, making a extremely environment friendly process that’s ideal for viscous and high fouling supplies.
Since they are managed individually, the pace of the scrapers could be optimized for a selected product being processed, so that materials that are vulnerable to shear stress or pressure damage (such as lotions and custards) may be dealt with delicately to stop harm while nonetheless providing high ranges of heat switch. Thought-provoking has proven particularly helpful in handling viscous meals products where texture and consistency are essential attributes. For instance, some creams or sauces might shear when subjected to extra stress, making them unusable. The Unicus means that efficient heat switch can be carried out at low pressures which overcomes these issues.
Each Unicus SSHE consists of three components: a hydraulic cylinder and power pack (although in smaller models a pneumatic cylinder can be supplied 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 number of tubes, every of which accommodates a stainless-steel rod to which the suitable scraping parts are fitted. Using a spread of food-safe supplies together with Teflon and PEEK (polyether ether ketone), these provide completely different inside geometry setups in accordance with the applying, similar to 120-degree scrapers for giant particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series can also be absolutely scalable by rising the shell diameter and including more interior tubes from a single tube as a lot as eighty in a single shell. A key characteristic is the specially designed seals which separate the inner tube from the separation chamber, tailored to the product software. These seals prevent leakage of the product and ensure inside and exterior hygiene. A standard vary of models for meals processing provide heat transfer areas from 7 to 107 square feet, while bigger models as much as practically 1,300 sq. feet can be made for particular uses.
One space where the Unicus Series excels is in evaporation purposes, the place the prevention of fouling is especially important. HRS has a specific version of the Unicus for use in evaporation items where quantity discount of the material is crucial. The scraping motion retains the heat transfer surfaces clean so that Unicus evaporators can focus supplies to a degree that is unattainable using conventional applied sciences. Unicus evaporators can be used in multi-effect setups or together 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 at the forefront of thermal know-how, providing innovative heat transfer solutions worldwide throughout a various range of industries. With forty years’ experience in the food and beverage sector, specializing in the design and manufacture of an extensive vary of turnkey techniques and parts, incorporating corrugated tubular, and scraped surface heat exchanger technology, HRS models are compliant with global design and business standards.For extra info, visit

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