Page 25 - PIGNAT catalogue 2020 GB_092020

EVAPORATION

EVV/2000 DOUBLE EFFECT EVAPORATOR

➢ Continuous concentration by double effect evaporation
using 2 level of pressure:
st
1 stage at atmospheric pressure
nd
2 stage under vacuum
Observe the steps of the process
Evaporation and climbing phenomenon
Separation of a liquid-vapour mixture in a cyclone
Condensation

Choose operating conditions and study their influence
Reduced or atmospheric pressure
Feed rate and steam flow rate
Single or double effect

Monitor the process
Thermal and material balance
Yield
General specifications • 10 L glass graduated receiver
with draining valve and vacuum
• Feeding tank. • Diaphragm vacuum pump.
connection.

www.pignat.com
www.pignat.com • Vacuum gauge.
• Metering pump.
Instrumentation
Supervision - Data acquisition • Glass shell evaporator, internal • Temperature probes Pt100Ω.
SS tube.

• Flowmeter.
• SS refrigerant

• Manometer.
• Glass cyclone.
• Level sensor.

• Solenoid valve.

• Glass shell evaporator, internal
SS tube.

100 - 240 V Water 20 kg/h
• Glass cyclone for vapor 1ϕ - 50/60 Hz 500 L / h 3 bar
separation.
Dim: 210 x 90 x 230 cm - 200 kg
The design The purpose of evaporation is to vaporise the
of this unit solvent in order to enrich the solute in the solu-
allows you to tion. At the end of the operation the substance
study single recovered is known as the concentrate.
or double
effect evapo- A conventional evaporator is heated by steam
ration which condenses and transmits heat energy to
the solution to be evaporated. As this solution
boils it in turn releases vapour which may:
- Either be condensed in a condenser, in which
case the process is known as “single effect” evap-
oration.
Option - Or be used to heat another evaporator, in which
case it is known as “multiple effect”.
Steam generator.
In theory an unlimited number of evaporators
may be associated in series in this way.

In industry evaporation is used to :
- Obtain crystallised sugar, concentrated milk,
concentrated fruit juices, paper pulp.

Chemical engineering & unit operations 25