Trotec 1110000120, Оригинальное руководство пользователя, Страница: 11 / 18

EN 11 desiccant dehumidifier TTR 160 / TTR 250
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.
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
Moreover, the intake air must not contain any particles of
substances with a melting point of less than 200 °C.
A) Inorganic substances (examples)
No. Substances Chemical formula Effects
1 lithium chloride LiCl reduced productivity of the silica gel
1)
2 sodium hydroxide NaOH destruction of the silica gel structure
3 potassium hydroxide KOH destruction of the silica gel structure
4 sodium chloride NaCl reduced productivity of the silica gel
1)
5 potassium chloride KCl reduced productivity of the silica gel
1)
6 calcium chloride CaCl
2
reduced productivity of the silica gel
1)
7 magnesium chloride MgCl
2
reduced productivity of the silica gel
1)
8 ammonia NH
3
destruction of the silica gel structure
9 hydrofluoric acid HF destruction of the mechanical strength of the rotor material
10 aluminium chloride AlCl
3
reduced productivity of the silica gel
1)
11 sea water reduced productivity of the silica gel
1)
12 steam with a high temperature destruction of the silica gel structure
13 softener clogging of the silica gel's pores
14 strong acids pH ≤ 2...3 destruction of the mechanical strength of the rotor material
15 bases pH ≥ 7...8 destruction of the sorption capacity of the silica gel
16 amines R-NH
2
reduced productivity of the silica gel
1)
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 Chemical formula Effects
1 oil mist clogging of the silica gel's pores
2 cyclohexanone C
6
H
10
O reduced productivity of the silica gel
1)
3 isopropyl alcohol CH
3
H
8
O reduced productivity of the silica gel
1)
4 o-xylene C
8
H
10
reduced productivity of the silica gel
1)
5 m-xylene C
8
H
10
reduced productivity of the silica gel
1)
6 p-xylene C
8
H
10
reduced productivity of the silica gel
1)
7 phenol C
6
H
5
OH reduced productivity of the silica gel
1)
8 o-dichlorobenzenes C
6
H
4
Cl
2
reduced productivity of the silica gel
1)
9 methyl bromide CH
3
Br reduced productivity of the silica gel
1)
10 glycerin C
3
H
8
O
3
reduced productivity of the silica gel
1)
1)
Reduces the internal pore surface of the silica gel leading to a loss of performance.