Grundfos Selcoperm SES Series, Installation And Operating Instructions Manual

Page: 34 / 82

English (GB)
34
6.2.13 Degassing and storage tank
• The degassing and storage tank must be installed as close as
possible to the Selcoperm electrolyser.
• The degassing and storage tank must be placed in a collecting
tray with leakage detection.
• The overflow level of the degassing and storage tank must not
be higher than 10 m above the foundation level of the
Selcoperm electrolyser. Otherwise the pressure inside the
system exceeds the limit.
• Details on components and connections see sections:
– 4.5 Degassing and storage tank
– 4.1.6 Piping and Instrumentation Diagram (PID) .
• If separate storage tanks for the NaClO solution are used, the
aeration of these tanks must be piped to a safe discharge
point outside the building. The storage location of the separate
tanks must comply with the ambient conditions of the
Selcoperm system. See section
5.1.3 Ambient conditions .
The piping of the degassing and storage tank comprises the
sodium hypochlorite solution line and the exhaust air line (see fig.
2 , pos. 3 and 4).
Fig. 23 Installation examples for the piping of the degassing
and storage tank
Fig. 24 Installation examples for T-piece
For the installation observe the following:
• The piping must be directed horizontally or with a constant
slight upwards incline to a safe discharge point (T) outside the
building. This is crucial for the safety of the whole installation,
because it ensures that no hydrogen can accumulate in the
lines. Hydrogen is much lighter than air and therefore rises in
the horizontal or inclining lines to the safe discharge point,
even if the forced ventilation fails.
• The piping must be installed as direct and straight as possible,
with no dips and no more than 10 m in length. For longer
distances ask Grundfos for suitable solutions.
– Only smooth bends should be used to avoid turbulent air
flow:
TM
06 46
69 151
6
SES
DST
TP
VN
T
T
T
VN
VN
SES
DST
4.13
4.13
4.13
TP
SES
DST
TP
WRONG
CORRECT
CORRECT
TM
06
46
68
23
16
Pos. Description
DST Degassing and storage tank assembly
SES Selcoperm electrolyser
T Exhaust air outlet to atmosphere
TP T-piece
VN Venturi nozzle
x Distance limited to 1 m
4.04 NaClO solution line level switch
4.13 Exhaust air flow sensor
T
M
06
4
6
7
9
15
16
x
TP
4.04
TP
TP
TP
TP
TP
CORRECT
WRONG
CORRECT CORRECT
CORRECT CORRECT