Reciprocating Action Solves Tough Heat Exchange Challenges

Scraped surface heat exchangers have been used for difficult heat transfer applications involving viscous fluids or the place fouling is an issue, corresponding to evaporation processes. The most common sort of scraped surface heat exchanger (SSHE) uses a rotating shaft with blades or augers which scrape the surface of the tube. The in style HRS R Series is based on this strategy. However, the design just isn’t optimum for each scenario, and so HRS developed the Unicus Series of reciprocating scraped floor warmth exchangers.
เพรสเชอร์เกจ of reciprocating scraped surface heat exchangers is right for viscous merchandise such as cream and tomato juice, as properly as products containing fruit pieces or particles.

The HRS Unicus Series is specifically designed to supply the improved heat transfer of a standard SSHE, but with a gentle action to preserve the standard and integrity of delicate food merchandise similar to cheese, yoghurt, ice cream, meat paste, and merchandise containing whole pieces of fruits or vegetables. Over the years, a number of different scraper designs have been developed, that means that every application, from processing curds to heating sauce or pasteurizing fruit compotes can be dealt with in essentially the most environment friendly yet gentle method potential. Other purposes the place the Unicus Series has been beneficial embrace handling meat slurry and mince, and processing yeast-malt extracts.
The hygienic design makes use of a patented stainless-steel scraping mechanism that strikes hydraulically back and forth inside every interior tube. The motion performs two key features: it minimizes potential fouling by preserving the tube wall clean and likewise creates turbulence inside the materials. Together, these actions enhance the speed of warmth transfer in the materials, making a extremely environment friendly process that is perfect for viscous and high fouling materials.
Since they’re managed individually, the velocity of the scrapers may be optimized for a selected product being processed, in order that supplies that are susceptible to shear stress or stress harm (such as creams and custards) may be dealt with delicately to prevent harm whereas nonetheless providing excessive levels of warmth transfer. The Unicus Series has confirmed notably useful in dealing with viscous meals products the place texture and consistency are necessary attributes. For instance, some creams or sauces could shear when subjected to extra pressure, making them unusable. The Unicus means that effective heat transfer could be carried out at low pressures which overcomes these issues.

Each Unicus SSHE consists of three components: a hydraulic cylinder and energy pack (although in smaller models a pneumatic cylinder could be supplied instead), a separation chamber to ensure hygiene and protect product separation from the motor, and the heat exchanger itself. The warmth exchanger consists of numerous tubes, every of which incorporates a stainless-steel rod to which the appropriate scraping parts are fitted. Using a spread of food-safe supplies together with Teflon and PEEK (polyether ether ketone), these provide totally different internal geometry setups in accordance with the appliance, such as 120-degree scrapers for big particulates and 360-degree scrapers for viscous fluids with out particulates.
The Unicus Series is also fully scalable by rising the shell diameter and adding extra interior tubes from a single tube up to eighty in a single shell. A key function is the specifically designed seals which separate the inside tube from the separation chamber, tailor-made to the product application. These seals stop leakage of the product and guarantee inside and external hygiene. A commonplace range of fashions for meals processing provide warmth switch areas from 7 to 107 square toes, while larger models as much as practically 1,300 square feet may be made for specific makes use of.

One space where the Unicus Series excels is in evaporation applications, the place the prevention of fouling is particularly necessary. HRS has a specific version of the Unicus to be used in evaporation units the place volume discount of the fabric is essential. The scraping action retains the warmth transfer surfaces clean so that Unicus evaporators can concentrate materials to a stage that is unattainable using traditional technologies. Unicus evaporators can be utilized 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 a half of the HRS Group, which operates at the forefront of thermal expertise, providing revolutionary warmth switch options worldwide throughout a various range of industries. With forty years’ experience within the food and beverage sector, specializing in the design and manufacture of an in depth vary of turnkey systems and components, incorporating corrugated tubular, and scraped floor heat exchanger technology, HRS items are compliant with global design and industry standards.For extra info, visit

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