IDC was selected by Saipem for the supply of three remineralization packages installed in Qatar, for QAFCO V Project.
The purpose of the three packages (potable water service, service water and cooling water service) is to add calcium bicarbonate to softened water with the aim to render the water suitable for drinking.
The adding of this calcium bicarbonate is done dosing the proper quantity of carbon dioxide in the demi water inlet stream. This slightly acid water flows on the filter bed of calcium carbonate, dissolving it and making the water suitable for the purpose.
An analysis system mounted downstream of the plant monitors that the outgoing water is not too acidic or too alkaline, controlling the CO2 dosage and the consequent quantity of dissolved calcium bicarbonate.
The system consists of three independent packages, each one composed by the following main units:
- No. 2 Limestone filters capable to treat a maximum flowrate of 50 m3/h
- No. 1 front piping skid for the automatic flow distribution during the different phases
- A common decompression system for CO2 with manual segregation valve, finned evaporator and pressure reducer valve
Each front piping skids has been designed to serve 2 limestone filters which work in parallel and has been supplied pre-mounted, pre-wired and tested in our construction facilities.
The backwash phase is performed with air and water and it is an essential step in the remineralization process to prevent channeling and malfunctioning during the filtration.
Interconnecting piping, stairs, walkways and automation logic complete the supply of this turnkey plant.