Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface heat exchangers have been used for tough heat switch purposes involving viscous fluids or the place fouling is an issue, similar to evaporation processes. The commonest type of scraped surface warmth exchanger (SSHE) makes use of a rotating shaft with blades or augers which scrape the floor of the tube. The well-liked HRS R Series is based on this method. However, the design isn’t optimal for each situation, and so HRS developed the Unicus Series of reciprocating scraped floor warmth exchangers.
The Unicus Series of reciprocating scraped floor heat exchangers is good for viscous merchandise corresponding to cream and tomato juice, as properly as merchandise containing fruit items or particles.
The HRS Unicus Series is specifically designed to supply the improved warmth transfer of a traditional SSHE, but with a mild motion to preserve the standard and integrity of delicate food products corresponding to cheese, yoghurt, ice cream, meat paste, and products containing complete items of fruits or vegetables. Over the years, numerous totally different scraper designs have been developed, that means that each software, from processing curds to heating sauce or pasteurizing fruit compotes may be dealt with in essentially the most efficient but gentle way possible. Other purposes the place the Unicus Series has been beneficial include handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design uses a patented stainless-steel scraping mechanism that strikes hydraulically backwards and forwards inside every inside tube. The movement performs two key capabilities: it minimizes potential fouling by preserving the tube wall clear and in addition creates turbulence inside the materials. Together, these actions increase the speed of warmth switch within the materials, making a extremely environment friendly course of that is ideal for viscous and high fouling materials.
Since they are controlled separately, the velocity of the scrapers can be optimized for a selected product being processed, in order that supplies that are vulnerable to shear stress or pressure injury (such as creams and custards) may be handled delicately to forestall injury whereas nonetheless providing high levels of warmth transfer. The Unicus Series has proven significantly useful in handling viscous meals merchandise the place texture and consistency are essential attributes. For example, some creams or sauces could shear when subjected to excess pressure, making them unusable. The Unicus means that efficient heat transfer could be carried out at low pressures which overcomes these problems.
Each Unicus SSHE consists of three parts: a hydraulic cylinder and energy pack (although in smaller models a pneumatic cylinder could 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, each of which contains a stainless-steel rod to which the appropriate scraping components are fitted. Using a range of food-safe supplies together with Teflon and PEEK (polyether ether ketone), these provide different inner geometry setups in accordance with the applying, corresponding to 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids without particulates.
The Unicus Series can also be totally scalable by growing the shell diameter and including more inside tubes from a single tube up to eighty in a single shell. A key characteristic is the specially designed seals which separate the internal tube from the separation chamber, tailor-made to the product software. These seals forestall leakage of the product and guarantee inner and exterior hygiene. A normal vary of fashions for meals processing present heat switch areas from 7 to 107 sq. ft, whereas bigger models as much as practically 1,300 square toes may be made for particular makes use of.
One area where the Unicus Series excels is in evaporation functions, the place the prevention of fouling is especially necessary. HRS has a particular version of the Unicus to be used in evaporation models where volume reduction of the material is essential. The scraping action keeps the warmth switch surfaces clean in order that Unicus evaporators can focus supplies to a level that’s unattainable utilizing 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 Ready , Georgia, HRS Heat Exchangers is a part of the HRS Group, which operates at the forefront of thermal know-how, offering revolutionary heat transfer options worldwide throughout a various range of industries. With forty years’ expertise in the meals and beverage sector, specializing in the design and manufacture of an intensive range of turnkey techniques and elements, incorporating corrugated tubular, and scraped surface warmth exchanger know-how, HRS models are compliant with world design and business requirements.For extra data, go to

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