230 Instruction Manual QuickTOC
®
ultra
IECEx 12E5119
9 Accessories and Options
9.5 CO2-Remover LAR | PROCESS ANALYSERS AG
9.5 CO
2
-Remover
The CO
2
-Remover serves to dry the compressed air and to remove the CO
2
from the compressed air
and operates according to the principle of pressure swing adsorption. Two identical columns with a hy-
groscopic desiccant bed are used.
9.5.1 Procedure of compressed air drying and CO
2
removal
The compressed air is transported through a filter and pressure regulator unit to the CO
2
-Remover. In
this filter and pressure regulator unit, most of the moisture, as well as oil aerosols and particles are re-
moved. The compressed air is then lead through one of the two columns of the CO
2
-Remover. Each co-
lumn contains a densely filled desiccant cartridge in which any remaining moisture and the contained
CO
2
is adsorbed. Subsequently, a large portion of the CO
2
-free dry air flows through the particle filter
(<1 micron / ISO8573.1, class 2) from the CO
2
-Remover to the analyser.
For regeneration, a small amount of this CO
2
-free dry air flows down countercurrently through the other
desiccant cartridge, removing the absorbed moisture and the absorbed CO
2
from this desiccant cart-
ridge. This air is released into the atmosphere and the desiccant cartridge is ready for the next adsorp-
tion.
The control switches regularly between the columns after renewed pressurisation at the upper end. This
ensures a continuous supply of CO
2
-free dry air at constant pressure. The CO
2
-Remover may also be
controlled by a zero-volt signal from the compressor. This energy saving mode detects when the com-
pressor is off and stops the operation until the compressor starts again.
9.5.2 Construction of the CO
2
-Remover
Fig. 147: Construction of the CO
2
-Remover
To Next Page
Loading...