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BP has awarded Eimco Water Technologies a contract to supply and install a freshwater manufacturing plant on the Schiehallion FPSO (floating production, storage and offloading vessel).

Located in the Schiehallion oil field in the north-east Atlantic Ocean to the west of the Shetland Islands, the high operating costs for the existing FPSO fresh-water making plant led BP to evaluate the payback of replacing the old system with the latest development in reverse osmosis (RO) technology, as designed by Eimco Water Technologies.

The new design had to meet tight transportation criteria, such as fitting into the existing footprint to minimise pipe-work and modification during installation.

The RO system replaces traditional methodologies and components with latest developments that include maintenance-free axial piston pumps, guaranteed for three years, which have also significantly reduced the amount of space required.

By introducing a new proportional chemical-dosing technique, Eimco Water Technologies is also expected to reduce chemical-refill frequency from a daily task to just once every 50 days, eliminating the need to dilute chemicals.

A PLC/HMI interface allows the plant to operate automatically and the installation of the latest membrane technology should save on costs by reducing the actual number of membranes required.

The lifetime of the RO membrane is expected to greatly increase through the utilisation of new advanced filters that eliminate the need for sand-cartridge filters and ensure a high-quality feed water.

Eimco Water Technologies

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