8
Withdrawal of gaseous chlorine
In case of higher chlorine requirement several chlorine containers
of the same temperature have to be connected with header lines.
Withdrawal of liquid chlorine
•
Within chlorination plants only possible from chlorine drums.
•
Application of an evaporator is necessary.
•
Withdrawal of gaseous chlorine: Observe residual pressure of
ca. 2 bar.
•
Withdrawal of liquid chlorine: Observe residual pressure of
ca. 4 bar.
After the extraction
•
Close container valve.
•
Disconnect container from the plant.
•
Screw on valve protection nuts.
•
Screw on protection cap.
2.3 Checking the tightness
Before commissioning check the tightness of the
whole plant
.
2.3.1 Checking the chlorine solution lines and the diaphragm
non-return of the injector
•
Observe the manual of the injector!
2.3.2 Checking the tightness of the vacuum lines
Vacuum lines are all lines between vacuum regulator and injector.
•
Close all container valves
•
Close the rate valve
•
Open the shut-off valve at the injection unit
•
Open motive water valve
•
Switch on the booster pump
•
Open the rate valve
– Floater shows gas flow or vacuummeter shows more than -
9 m w. c.:
Leakage in vacuum line!
•
Close rate valve
•
Switch off booster pump
•
Close motive water valve
•
Close the shut-off valve at the injection unit
•
Check the vacuum lines and the connection. If necessary,
carefully re-tighten them.
•
Check tightness again!
– Floater shows no gas flow, vacuummeter shows -9 m w. c.
or less:
Vacuum lines are tight
.
2.3.3 Checking the tightness of pressure gas lines
Pressure gas lines are all lines from the gas containers to the
vacuum regulator.
•
If the plant is equipped with a nitrogen rinsing device: Check
tightness roughly with nitrogen
•
Detailed checking with ammonia
Checking the tightness with nitrogen
•
Close all container valves
•
Open container connection valves and all shut-off valves up
to the gas dosing system
•
Open the connection valve of the nitrogen cylinder
•
Slowly open the valve of the nitrogen cylinder, until the lines
have a pressure of about 10 bar (read at the manometer of
the vacuum regulator).
•
Apply soap water to all components under pressure
– Formation of bubbles and/or pressure drop at manometer
Leakage in pressure lines!
– Depressurize the plant!
– Eliminate leakage!
– Check tightness again!
No formation of bubbles, pressure at manometer does not drop
significantly within one hour:
Pressure lines are tight.
Checking the tightness with ammonia
See chapter
.
Caution
At 15 °C about 1 % (DIN19607) of the content can
be withrawn per hour. In case of higher
withdrawal danger of malfunction by the
formation of ice on containers and piping!
Container size
Withdrawal quantity
50 Kg
500 g/h
65 Kg
650 g/h
500 Kg
5 Kg/h
1000 Kg
10 Kg/h
Caution
Do not completely evacuate the chlorine drums.
Danger of withdrawing deposits!
Caution
Immediately close connection lines.
No moisture must get into the lines!
Warning
Do not check the tightness until the whole plant
is ready for start-up.
Danger of chlorine break-out!
Note
More possible reasons for insufficient operating
vacuum
•
injector layed out too weakly or defective
•
injector obstructed
•
booster pump layed out too weakly or
defective
Warning
Maximum nitrogen pressure 16 bar!
Danger of damages and gas leakage when being
exceeded!
