Chlorine Extraction - Grundfos Vaccuperm VGA-113 Montage- Und Betriebsanleitung

Checking the tightness with ammonia
Warning
Ammonia is irritating to eyes, respiratory system and
skin.
Ammonia is very toxic for water organisms.
When checking the tightness with ammonia, wear
tight protective goggles, gloves and clothes.
Fig. 21 Hazard notes for ammonia
Even very small leakages become evident with ammonia vapour,
which reacts with chlorine gas forming white mist.
Warning
Liquid ammonia must not come in contact with lines
or parts of the system, because it is very corrosive.
Remove drops immediately with a dry cloth.
Checking the pressure connections (after change of
container)
1. Open the container valve and immediately close it again.
2. Open the flexible plastic bottle filled with ammonia water.
3. Slightly press the bottle in a pumping manner, allowing the
ammonia mist to rise up. Slowly pass the open ammonia
bottle along gas-leading parts.
4. If white mist forms, the pressure connection is leaky.
Fig. 22 Ammonia and chlorine gas form white mist
5. Depressurise the system.
6. Eliminate the leakage.
7. Repeat the tightness check.
8. If no white mist forms, the pressure connection is tight.
Fig. 23 Pressure connection is tight
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Checking the inlet valve
1. Loosen the union nut at the overpressure connection of the
vacuum regulator, and remove the overpressure line.
2. Inlet valve has to be closed (No vacuum).
3. Open the chlorine container valve.
4. Open the flexible plastic bottle filled with ammonia water.
5. Slightly press the bottle in a pumping manner, allowing the
ammonia mist to rise up. Slowly pass the open ammonia
bottle along gas-leading parts.
6. If white mist forms, the inlet valve is leaky.
7. Depressurise the system via injector.
8. Check the inlet valve and repair it.
9. Repeat the tightness check.
10. If no white mist forms, the inlet valve is tight.

6.2 Chlorine extraction

6.2.1 Connecting the chlorine container
Chlorine containers must be stored at least for 8 hours in the
container room, so that the content can adapt to the ambient
temperature.
Warning
Chlorine containers must not have a higher
temperature than other parts of the system. Danger
of liquefaction and escape of chlorine!
1. Turn chlorine drums on their support, until the dip pipe and the
riser pipe are placed vertically (observe the markings on the
drum).
2. Protect chlorine containers from turning over or rolling away.
3. Dry the piping and the extraction system with dry nitrogen or
dry air.
4. No foreign matter must get into the system.
5. Provide the pressure connection with a new gasket.
6. Connect the chlorine container. When using drums, observe
that the lower valve is normally intended for the extraction of
liquid chlorine.
7. Slowly open the container valve.
6.2.2 Container valves
Operate the valves at the chlorine containers only manually
without force. Close the valves of full or empty chlorine containers
with closing nut (marked chlorine or Cl
Warning
Do not open container valves using force!
Stuck valves
Stuck valves can be loosened by wrapping a cloth with warm
water around the valve. If this is not possible, return the container
to the manufacturer.
• Never use an open flame to heat up the valve!
• Never use wrench lengthening!
6.2.3 Checking the tightness
Before start-up, check the tightness of the entire system, see
section 6.1 Checking the tightness.
) and gasket.
2