Waterworks city of Toulouse |
| |
 |
| |
Two chlorine dioxide plants with very
high capacities are in operation in order to supply the city
of Toulouse with drinking water. Absolute safety in distribution
of the decontaminated water to the households is required.
During pre-chlorination and during post-chlorination of the
water, the second system is in stand-by operation and is automatically
switched on at a possible failure. The automatic 24-hours
control transfers error messages immediately to the central
computer of the waterworks. The individual control of the
dosing pumps is also automatic. A rewarding investment for
Compagnie générale des eaux. As the drinking
water treatment system developed by Grundfos Alldos France replaces
two of the twenty-year-old plants.
A look at
Customer's plant:
Waterworks of the city of Toulouse
Customer's requirement and unusual features:
Absolute security, high automation level, especially concerning
the control of dosing pumps
Technical features:
 |
|
Treatment
process: Cl2 and NaClO2 (2 chlorine dioxide systems
Type Oxiperm 166) |
|
|
Capacity:
2 x 10 kg |
|
|
Water
flow capacity: 3000-5300 m3 /h |
|
|
Control:
decentralized control by PLC with interactive graphic
display and Modbus communication interface for the central
system (Télémecanique) |
Applied piston diaphragm pumps
Type DMH models 25x 257:
Pre-chlorination: 3 pumps à 1300l / h, one in
stand-by-operation
Post-chlorination: 2 pumps à 1100l / h, one
in stand-by-operation |
|
|
