Munters MX2 95 - Low Dewpoint Purge

2.5.5 LowDewpointPurge
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5
3
6
4
1
7
Figure 2.11 Low Dewpoint Purge principle
1. Reactivation air
2. Heated reactivation a ir
3. Wet air
4. Process air
5. Dry air
6. Warm purge air
7. Adjustable damper
Low Dewpoint Purge (L
DP) is used to enable e xtra low dewpoints. A minor part of the process airflow is
forced through a sma
ller sector of the rotor which, according to the rotor rotation direction, is positioned
directly after the r
eactivation sector. The result is that a part of the process air is taken off (purge air) and the
rotor ma terial is c
ooled down before it is exposed to the dry air outlet sector. The warm purge airflow which
is drawn from the s
maller sector of the rotor passes an adjustable damper and enters the reactivation air just
before the react
ivation heater. This makes drying of the rotor more efficient.
NOTE!
Thepurge
airflow setting isapplicationdependentand shouldonlybeadjustedbyspeciallytrained
personnelduri
ngthecommissioningto obtainthe desireddryairdewpoint. A general recommendation isthatthe
purgeairflowre
presents10 %ofthe totalprocessairflow.
MX² 30
MX² 35-95
Figure 2.12 Adjustable damper for Low Dewpoint Pur ge
NOTE!
Theadjustabledamperisset fromthefactoryandshouldonlybeadjustedbyspeciallytrainedpersonnel.
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Dehumidifierdesign 190TEN–1089–G1412