Concentration_-_Falling_Film |

Falling Film Tubular – Tubular Evaporation – Steam-Based

Industry: Fruit and Vegetables (NAICS 3114) Dairy (NAICS 3115)

NAICS process:

311411 Frozen Fruit and Vegetables

311421 Canned Fruit and Vegetables

311514 Evaporated and Condensed Milk


Process Brief: Water is removed using a vacuum to draw condensate and water vapor downward inside a tube that is heated by steam on the outside.

Energy source: Steam/natural gas

Energy Intensity:


Falling film evaporators are the dominant technology in the food industry, representing an important advance over earlier rising film evaporators. The basic configuration is similar to a rising film unit, except that the liquid film moves downward in the tubes due to gravity. Creating a uniform film in the tube is difficult and is achieved by using specially designed nozzles or spray distributors at the top of the tube. The tubes are about 30 feet long and 1 – 2 inches in diameter. Process control is more expensive than rising film systems but the cost is justified by high throughput rates. Residence times are 20 – 30 seconds, compared to 3 – 4 minutes in a rising tube system. One concentrated orange juice facility installed a falling film evaporator with a capacity of 500,000 gallons per day. The evaporator had a capital cost of $2 million.


Concentration_FallingFilm_FMC_Graphic Concentration_FallingFilm_FMC_Text











FMC photo and graphic from 3/2007;



Five-effect graphic from 3/2007


More Information




FMC FoodTech Chicago

200 East Randolph

Chicago, IL 60601

Telephone: 312-861-6000

Web site:



GEA Wiegand GmbH

Einsteinstraße 9-15

76275 Ettlingen


Telephone: + 49 (0)7243/705-0

Web site:



Niro Inc.

9165 Rumsey Road

Columbia, MD 21045

Telephone: 410-997-8700

Web site:



Swenson Technology, Inc.

26000 Whiting Way

Monee, IL 60449-8060 USA

Telephone: 708-587-2300

Web site:

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