Concentration_FallingFilm_FMC_Photo
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 http://www.fmctechnologies.com/upload/tastearticle.pdf 3/2007;

 

Concentration_FallingFilm_GEA

Five-effect graphic from http://www.gea-wiegand.com/ndk_website/geawiegand/cmsdoc.nsf/WebDoc/ndkw5r8cu3 3/2007

Concentration_FallingFilm_Graphic_Swenson

http://www.swensontechnology.com/fig7.html

More Information

http://www.cheresources.com/evapzz.shtml

 

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Manufacturers

 

FMC FoodTech Chicago

200 East Randolph

Chicago, IL 60601

Telephone: 312-861-6000

Web site: www.fmctechnologies.com

 

 

GEA Wiegand GmbH

Einsteinstraße 9-15

76275 Ettlingen

Germany

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

Web site: www.gea-wiegand.com

 

 

Niro Inc.

9165 Rumsey Road

Columbia, MD 21045

Telephone: 410-997-8700

Web site: www.niroinc.com

 

 

Swenson Technology, Inc.

26000 Whiting Way

Monee, IL 60449-8060 USA

Telephone: 708-587-2300

Web site: www.swensontechnology.com