Product Description
Scraped surface heat exchangers (SSHE) are specialized heat transfer devices used in various industries for highly viscous or heat-sensitive products. They consist of a cylindrical shell with an internal rotor that scrapes the product off the heated surface as it rotates. This scraping action promotes efficient heat transfer and prevents product fouling or degradation. SSHEs are commonly used in food processing, pharmaceuticals, and other applications requiring precise temperature control and gentle handling of viscous products.
FAQs:
Q: What is a scraped surface heat exchanger (SSHE)?
A: A scraped surface heat exchanger is a heat transfer device designed for processing highly viscous or heat-sensitive products. It consists of a cylindrical shell with an internal rotor fitted with scraping blades. As the rotor rotates, the blades scrape the product off the heated surface, facilitating efficient heat transfer and preventing fouling or degradation.
Q: How does a scraped surface heat exchanger work?
A: A scraped surface heat exchanger operates by combining heat transfer and mechanical action. The product enters the heat exchanger and forms a thin film on the heated surface. The rotating blades of the internal rotor continuously scrape the product off the surface, promoting heat transfer and maintaining a consistent product film thickness. The heated product is then discharged, while the cooling medium (if applicable) maintains the desired temperature.
Q: What are the advantages of using scraped surface heat exchangers?
A: Scraped surface heat exchangers offer several advantages. They are particularly suited for handling highly viscous or heat-sensitive products that may foul or degrade in conventional heat exchangers. The scraping action promotes efficient heat transfer, prevents product fouling, and ensures consistent product quality. Scraped surface heat exchangers also allow for precise temperature control, gentle product handling, and reduced residence time, resulting in improved process efficiency.
Q: Where are scraped surface heat exchangers used?
A: Scraped surface heat exchangers are used in various industries, including food processing, pharmaceuticals, cosmetics, and specialty chemicals. They are commonly employed in applications involving the processing of viscous products, such as sauces, confectionery fillings, doughs, creams, polymers, waxes, and high-fat products. SSHEs are suitable for applications requiring precise temperature control, uniform product consistency, and gentle handling.
Q: Can scraped surface heat exchangers handle high-viscosity products?
A: Yes, scraped surface heat exchangers are specifically designed to handle high-viscosity products. The scraping blades of the internal rotor effectively agitate and remove the product from the heated surface, even in highly viscous conditions. This promotes efficient heat transfer and prevents product buildup or fouling, allowing for successful processing of high-viscosity materials.
Q: Are scraped surface heat exchangers suitable for heat-sensitive products?
A: Yes, scraped surface heat exchangers are well-suited for heat-sensitive products. The scraping action ensures gentle and controlled heat transfer, minimizing the risk of thermal degradation or product quality deterioration. The ability to maintain precise temperature control and short residence times further helps in processing heat-sensitive materials while preserving their desired properties.
Superior Heat Exchange for Challenging ProductsThe Scrapped Surface Heat Exchanger is designed to handle viscous and sticky products, ensuring efficient heat transfer without compromising on consistency or hygiene. Its scrapers prevent product buildup and enable continuous, optimal processing of items like jams, creams, and sauces.
Robust and Hygienic ConstructionManufactured from high-grade SS304/SS316 stainless steel, this exchanger features a corrosion-resistant structure and mirror-polished internal surfaces for enhanced cleanliness. The adjustable scraper system, combined with CIP compatibility, guarantees easy maintenance and reliable operation.
Flexible Operation and Precision ControlEquipped with an adjustable rotor speed ranging from 50 to 300 rpm and variable liquid flow rates up to 10 m3/h, this heat exchanger adapts to diverse processing requirements. It supports multiple connection types and boasts strong insulation, contributing to energy efficiency and safety.
FAQ's of Scrapped Surface Heat Exchangers:
Q: How does the Scrapped Surface Heat Exchanger improve processing of viscous or sticky products?
A: The system uses rotors with adjustable speeds and PTFE or stainless steel scrapers to constantly remove build-up from surfaces, ensuring efficient heat transfer and uninterrupted flow, which is crucial for products like jams and creams.
Q: What materials are used in constructing the heat exchanger and why?
A: SS304 or SS316 stainless steel is used for both shell and rotors, ensuring durability, corrosion resistance, and compliance with hygiene standards for food and pharmaceutical processing.
Q: When should I use a Scrapped Surface Heat Exchanger instead of other types?
A: It is ideal when handling viscous, sticky, or particulate-rich products that may cause fouling in conventional heat exchangers, as its scraping mechanism effectively maintains performance and product quality.
Q: Where is the Scrapped Surface Heat Exchanger commonly installed?
A: It is floor-mounted with adjustable feet, allowing for stable installation in factories, processing plants, or production facilities handling food, dairy, or confectionery products.
Q: How is cleaning managed for this heat exchanger?
A: The unit is designed for Clean-in-Place (CIP) systems, enabling automated and thorough cleaning cycles without disassembly, minimizing downtime and ensuring sterility in production.
Q: What are the benefits of the mirror-polished internal surface?
A: Mirror-polished internal surfaces reduce product adhesion, facilitate easy cleaning, and decrease the risk of contamination, enhancing overall product quality and process hygiene.
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