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Plant for the Istanbul waterworks
 
Shock chlorination for a water quantity of 55,000 m³/h! This is the result of a large project carried out by Grundfos Alldos for the city of Istanbul together with Durko as the local representative.The background: the municipal waterworks of the Turkish metropolis draw their raw water from a local lake. The water is routed from there to the various waterworks for treatment.To enable problem-free transport, disinfection must first be carried out so that the pumps and pipelines do not become overgrown with mussels and algae. The plant had to be dimensioned such that it is able to add 15 mg/l chlorine to the raw water within 10 to 20 minutes prior to entry into the pumping station.

And this was the solution: four Grundfos Alldos oil bath vaporizers which convert liquid chlorine into gas. In addition, four Grundfos Alldos large-scale chlorine systems operating under vacuum and controlled by a PLC to exactly dose the calculated quantity of chlorine. Pressure surges which could occur because of the enormous water quantities and the pressures to the injectors are reliably prevented due to the PLC. With this program, the valves are opened and closed step by step. A specially calculated injection system exactly doses the chlorine solution into the inlet channel to the waterworks. This guarantees optimum, homogeneous mixing.

Grundfos Alldos of course also paid particular attention to plant safety. An integral component is a chlorine monitoring unit which starts up a neutralization plant in the event of a leak.
A look at

Customer's requirement and unusual features:
  Within 10 to 20 minutes, exactly 15 mg/l chlorine shall be added to the raw water prior to entry into the pumping station.

The solution by Grundfos Alldos:
  Four Grundfos Alldos oil bath vaporizers converting liquid chlorine into gas.
  Four Grundfos Alldos large-scale chlorine systems operating under vacuum and controlled by a PLC to exactly dose the calculated quantity of chlorine.
  The PLC program avoids pressure surges by opening and closing the valves step by step.
  A specially calculated injection system exactly doses the chlorine solution which guarantees optimum, homogeneous mixing.
  An integral chlorine monitoring unit starts up a neutralization plant in the event of a leak.