Ensure a Steady Supply of Desalinated Water for FGD at Coal-Based Power Plant

Published on by for Fluence Corporation

Ensure a Steady Supply of Desalinated Water for FGD at Coal-Based Power Plant

Fluence provided dual-train desalination system supply process water for a flue-gas desulfurization (FGD) at a coal-based power plant in Chile, needed to comply with the country’s strict environmental regulations. 

STX Heavy Industries, a Korean EPC, recently implemented a flue-gas desulfurization (FGD) system at a coal-fired power plant in Chile in order to comply with the country's strict environmental regulations. The FGD process requires large amounts of high-quality water. STX chose Fluence to design, manufacture, supply and commission, a seawater desalination plant at the CELTA power plant in Tarapaca, Chile. The new plant provides 2,400 m3/d of high-quality, desalinated process water for the FGD and other needs. 

Challenges
One of the main challenges the project faced was the very limited footprint available for the desalination plant. Because the CELTA power plant is located in a zone of high seismic activity, all metal structures, tanks, and other equipment had to be engineered to meet Chile's strict seismic standards. 

The Solution
To ensure a steady supply of desalinated water, the system was designed with 100% installed duty-standby redundancy across all aspects of the plant, including electromechanical equipment and PLC, as well as pretreatment and desalination units.

Results: The system is working at full capacity in compliance with water quality specifications. 

The Technology

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