Product Overview
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Wiped Film Evaporator (WFE), also known as a thin-film evaporator, is a single-pass, continuous vacuum evaporation system that uses a mechanical wiping device to form a forced thin film of liquid material on the heated surface. The uniform and thin liquid film enhances heat and mass transfer, enabling high evaporation rates with short residence times.
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It is designed for processing a wide range of heat-sensitive, high-boiling, fouling-prone, and high-viscosity materials, with well-established applications in pharmaceuticals, chemicals, cosmetics, food processing, cannabinoid extraction, flavors and fragrances, and other industries.
Evaporation Area
System Operating Vacuum
Heating Temperature
0.1 - 20 ㎡
≤0.1 Pa
[model-dependent]
RT- 250℃
[upgradable to 300℃]
Working Principle
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Feeding and Distribution: The feed material enters the evaporator at the top and is evenly distributed across the inner wall of the heated tube by a rotating wiper system, forming a thin film.
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Thin Film Formation and Evaporation: The design of the wiper ensures that the feed material forms a thin and uniform film on the heating surface, which rapidly evaporates as it flows downward due to conductive heat.
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Heat Transfer: The walls of the evaporator are typically heated to temperatures ranging from RT to 250 °C, achieved through an oil heating jacket. The lighter components (lower boiling points) of the material evaporate as they pass through the evaporator and are condensed in an external condenser.
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Condensation and Collection: The vapors produced by evaporation are condensed in a condenser and then collected in a receiving vessel. Non-volatile components are discharged as a liquid from the bottom of the evaporator.
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Wiper System: The design of the wiper system is crucial for maintaining the stability of the thin film and optimizing heat transfer. LAB1ST's WFE series employs a spring-loaded, angled wiper system to ensure even distribution of the thin film.
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Application
Pharmaceuticals
Concentration and purification of heat-sensitive active pharmaceutical ingredients (APIs).
Chemical Processing
Evaporation and concentration of solvents, oils, and other chemical substances.
Food and Beverage
Processing of flavors, essential oils, and other sensitive food ingredients.
Hemp Industry
Efficient removal of solvents in the production of high-quality extracts and concentrates.