Evaporation
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The History:APV designed the first plate heat exchanger in the early 1920's. By the mid 1950's APV evaporation systems were also using the Plate design. These were the first plate evaporation systems in the world. The benefits of the plate over the common tubular designs were many. The Plate Evaporator allowed for system expansion, full accessibility to the heat transfer area, lower headroom, shorter residence time and lower installation cost. The next 50 years realized a huge influx of plate evaporators into the market, with APV as the recognized leader in product knowledge and system design. Today the APV Evaporator group has experience with a wide range of food, chemical, industrial, and pharmaceutical products system design. The installed base of APV evaporator systems is over 4,000 worldwide making APV one of the world leaders in evaporation technology. |
APV has several unique evaporator designs
The Falling Film Plate Evaporator:
APV has developed the only Falling Film plate evaporator
in the world. The Falling Film Plate Evaporator has proven to be
the best solution for heat sensitive products. Taste and color are
preserved when processing in the Falling Film Plate. The low
residence time, single pass design and extremely low temperature
difference account for the highest quality concentrate.
The Falling Film Hybrid Evaporator
A falling film evaporator is constructed from stainless and high
alloy steel plates that are fully welded. Ideal for high pressure
and corrosive non-fouling duties where suitable gaskets are not
available for the requested duties which might include solvents and
concentrated acids.
The Rising/Falling Film Plate Evaporator:
APV has also developed the only Rising/Falling Film plate
evaporator in the world. The APV Rising/Falling Film Plate
Evaporator is another excellent system for heat sensitive products.
The APV Rising/Falling Film Evaporator can be used in areas with
headroom as low as 10 ft. (3 m). The Rising/Falling Film principle
has been found to minimize foaming applications.
Applications - Falling Film and
Rising/Falling Film:
- Fruit Juices
- Fruit Concentrates
- Sugars and corn syrups
- Amino Acids
- Broths
- Cheese Whey
- Coffee
- Gelatin
- Milk
- Whey Protein
- Pharmaceutical Products
- Pectin
- Egg
- Beer
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Paravap/Paraflash
Plate Evaporator: The Paraflash design is used for products with high concentrations of suspended solids. The product is heated in the plate pack, but the product is not allowed to boil in the plate pack. All evaporation takes place in the separator. This suppressed boiling design greatly minimizes fouling of the plates. Both the Paravap and Paraflash styles can be done in a variety of materials. APV also offers welded plate packs for applications that gasket compatibility is problematic. |
Applications - Paravap and Paraflash Evaporators:
- Fruit Juice Finisher
- High Viscosity Fruit Concentrates
- Sugar solutions to 98% solids
- Gelatin Finishers
- Chicken Broth Finishers
- Corn Syrups
- Coffee Finisher
- Gelatin
- Whey Protein Concentrate
- Brewers Yeast
- Kaolin Slurries
- Inorganic Salts
Tubular Evaporation:
APV has also designed and installed large tubular evaporation systems for food and industrial applications. The APV skidded modular designs have proven to be cost-effective solutions when compared to field erected systems. When a complete modular approach is not possible due to size APV will ship the tubular units for site erection and provide separator modules to minimize site labor.
Applications - Tubular Evaporators:
- Caustic Soda
- Glycerine
- Ammonium Nitrates
- Solvent Evaporators
- Waste Water
- Black Liquor
- Inorganic Salts
- Acids
- Whey
- Large Milk Evaporators
Product Design and Energy Design Philosophy:
Many factors come into play when considering an Evaporator design.
Product properties such as Boiling Point Elevation, Viscosity,
Fouling Tendency and Temperature Sensitivity need to be discussed
and evaluated before a solution can be offered. The APV product
Laboratory in Getzville, NY is used to profile products for initial
design purposes. Following the bench-scale profiling APV can offer
testing on our fleet of pilot evaporators at our Lake Mills, WI
test center.
When energy cost is major project driver APV can help by offering innovative solutions. APV energy efficient designs such as Mechanical Vapor Recompression (MVR) and Thermal Vapor Recompression (TVR) Evaporators are used with respect to the product being concentrated. APV industrial evaporators have also been combined with double effect distillation systems and MVR evaporators to employ all available energy back into the process.
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| Contact Information: | |
| David J. Loschiavo
Project Sales Engineer - Distillation/Evaporation |
George Bedwell
Principal Engineer |
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Wally Jeremiejczyk
Sector Manager - Fruit Juice & Beverage |
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