Harmful Influences On Rotors - Trotec TTR 2000 Mode D'emploi

Harmful influences on rotors

Some of the substances and compounds listed below are typical
examples for substances dissolving the honeycombed silica gel
rotors or else negatively affecting the dehumidification
performance.
The sorption rotor should not be charged with air which is
contaminated with the following or similar substances. Even
minor concentrations in the air can have lasting harmful effects
on the rotor material and the sorption capacity.
A) Inorganic substances (examples)
No. Substances
1 lithium chloride
2 sodium hydroxide
3 potassium hydroxide
4 sodium chloride
5 potassium chloride
6 calcium chloride
7 magnesium chloride
8 ammonia
9 hydrofluoric acid
10 aluminium chloride
11 sea water
12 steam with a high temperature
13 softener
14 strong acids
15 bases
16 amines
B) Organic substances (examples)
The solvents or volatiles listed below have a high boiling point
and a low vapour pressure. Provided these substances are
adsorbed by silica gel, they remain in the material on a
permanent basis.
No. Substances
1 oil mist
2 cyclohexanone
3 isopropyl alcohol
4 o-xylene
5 m-xylene
6 p-xylene
7 phenol
8 o-dichlorobenzenes
9 methyl bromide
10 glycerin
1)
Reduces the internal pore surface of the silica gel leading to a loss of performance.
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Chemical formula Effects
LiCl reduced productivity of the silica gel
NaOH destruction of the silica gel structure
KOH destruction of the silica gel structure
NaCl reduced productivity of the silica gel
KCl reduced productivity of the silica gel
CaCl reduced productivity of the silica gel
2
MgCl reduced productivity of the silica gel
2
NH destruction of the silica gel structure
3
HF destruction of the mechanical strength of the rotor material
AlCl reduced productivity of the silica gel
3
reduced productivity of the silica gel
destruction of the silica gel structure
clogs the silica gel pores
pH ≤ 2...3 destruction of the mechanical strength of the rotor material
pH ≥ 7...8 destruction of the sorption capacity of the silica gel
R-NH reduced productivity of the silica gel
2
Chemical formula Effects
clogs the silica gel pores
C H O reduced productivity of the silica gel
6 10
CH H O reduced productivity of the silica gel
3 8
C H reduced productivity of the silica gel
8 10
C H reduced productivity of the silica gel
8 10
C H reduced productivity of the silica gel
8 10
C H OH reduced productivity of the silica gel
6 5
C H Cl reduced productivity of the silica gel
6 4 2
CH Br reduced productivity of the silica gel
3
C H O reduced productivity of the silica gel
3 8 3
desiccant dehumidifier TTR 2000 / TTR 2800 / TTR 3700
The listed substances remain in the rotor material or the rotor
elements and can bring about the following effects:
• Reduced performance owing to the clogging of the silica
gel's pores
• Reduced performance owing to the chemical reaction with
the silica gel
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