GEA Process Engineeringengineering for a better world

At -28°C, vapour removal becomes less of a problem

DRY CONDENSING

Condenser

Scrubber

Inlet oil

Deodorizer

Steamor oil

heating

Strippingsteam

225 kg/h

Outlet oil

Ffa outlet

Coolingwater

Cooling water2 m3/h

Motive steam at10 bar 150 kg/h

Cooling water17 m3/h

Steam jetejectors

Water ringpump

Surfacecondenser

Condensate155 kg/h

Air 4 kg/h

Condenser

De-icing

Emptying

Condensate 235 kg/hProduct 3 kg/h

Steam 5 barPeak 200 kg/hAverage 10 kg/h

Steam 5 barPeak 250 kg/hAverage 65 kg/h

60-80° C

Condenser

Refrigerantcondenser

Water0.8 m3/h

Priorityreceiver

Oil separator

Oil cooler

Refrigerant separator

Refrigerant receiver

Compressor

Oil recuperation

For an environmentally friendly and cool solution to the challenge

of water vapour removal, consider Dry Condensing (DC). It’s

effective because water vapour is literally turned into ice – and

because it helps you save money while protecting the environment.

Conventional “wet” condensing is a steam-driven vacuum system

that compresses water vapour via steam ejectors and then condenses

the water vapour into liquid via cooling water.

Dry Condensing (DC) is a cryogenically driven vacuum system that

condenses water vapour into ice directly, eliminating the liquid

phase. GEA Process Engineering has half a century’s experience with

the Atlas Dry Condensing technology and has delivered more than

50 major DC plants over the past two decades.

Ever increasing effluent treatment and energy costs are only one of

the drivers for implementing a cryogenically driven Dry Condensing

system. Engineers the world over are discovering just how cool Dry

Condensing is, as the process of water vapour removal under high

vacuum delivers several advantages.

Cuts pollution

Stripped-off pollutants can easily be separated from the relatively

small condensed water volume expelled by the Dry Condensing

system, compared with the relatively large volume expelled by

conventional “wet” condensing systems.

Cuts water consumption

The Dry Condensing system uses just one-tenth of a percent of the

water consumed by conventional “wet” condensing systems.

Cuts energy

The Dry Condensing system requires only 10-20% of the energy

consumed by a conventional “wet” condensing system.

Pays for itself

The return-on-investment period for most Dry Condensing

installations is approx. two years.

Numerous applications

• Edible oil deodorization

• Fatty acid distillation

• Fatty acid fractionation

• Glycerine distillation

• Water sublimation (freeze drying)

• Water removal under vacuum (<6mbar)

The Atlas Dry Condensing plant

from GEA Process Engineering

An alternative vacuum system

Example:Vacuum 1.5 mbarSteam 225 kg/hAir 4 kg/hProduct 3 kg/hTemperature 80° C

Four dry condensing units on the roof at Walter Rau, Neuss, Germany

Trapped in the ice

Condenser

Scrubber

Inlet oil

Deodorizer

Steamor oil

heating

Strippingsteam

225 kg/h

Outlet oil

Ffa outlet

Coolingwater

Cooling water2 m3/h

Motive steam at10 bar 150 kg/h

Cooling water17 m3/h

Steam jetejectors

Water ringpump

Surfacecondenser

Condensate155 kg/h

Air 4 kg/h

Condenser

De-icing

Emptying

Condensate 235 kg/hProduct 3 kg/h

Steam 5 barPeak 200 kg/hAverage 10 kg/h

Steam 5 barPeak 250 kg/hAverage 65 kg/h

60-80° C

Condenser

Refrigerantcondenser

Water0.8 m3/h

Priorityreceiver

Oil separator

Oil cooler

Refrigerant separator

Refrigerant receiver

Compressor

Oil recuperation

The Atlas Dry Condensing plant

from GEA Process Engineering

An alternative vacuum system

Water phase diagram: Liquid – water, Solid – ice, Gas – vapour

Pres

sure

(m

bar

)

Temperature (°C)

VAPOUR

SOLID

LIQUID

-50 0 50 100 150

1000.00

100.00

10.00

1.00

0.10

Melting lineSaturation lineSublimation line

There can only be two phases, vapour and ice, in condensation at a pressure below a water vapour pressure of 6 mbar (the Triple Point). Vapour is therefore condensed directly into ice (as de-sublimation). We call it “dry” condensing as opposed to “wet” condensing into water.

Dry condensing unit on the roof at Cereol, Martfü, Hungary

Two dry condensing units at AAK, Karlshamn, Sweden

Dry condensing unit at Cereol, Bordeaux, France

GEA Group is a global engineering company with multi-billion euro sales and operations in more than 50 countries. Founded in 1881, the company is one of the largest providers of innovative equipment and process technology. GEA Group is listed in the STOXX® Europe 600 Index.

We live our values.Excellence • Passion • Integrity • Responsibility • GEA-versity

BNA

929

/GB

1014

CBC

©

GEA

Pro

cess

Eng

inee

ring

A/S

. All

right

s re

serv

ed.

Su

bjec

t to

mod

ifica

tions

. Prin

ted

in D

enm

ark.

GEA Process Engineering

GEA Process Engineering A/S

Gladsaxevej 305 · DK-2860 Soeborg · Denmark Tel: +45 39 54 54 54 Fax: +45 39 54 58 00 E-mail: gea-niro.food@gea.com Website: www.gea.com