We performed detailed design, procurement support and construction support services for the grey water treatment system at Duke Energy’s 620-MW Integrated Gasification Combined Cycle (IGCC) project in Edwardsport, Indiana. Our work included preparation of construction documents for all engineering disciplines — civil, structural, mechanical, electrical, controls and instrumentation. The IGCC plant is a GE/Bechtel Reference Plant Design. The grey water process design was performed by HPD.
Due to unique permitting challenges, the project schedule was exceptionally tight. Our efforts included numerous work-arounds to accelerate project schedule at the lowest possible overall project cost.
The GE IGCC technology produces a byproduct of water that contains many of the constituents found in the feedstock coal analysis. Referred to as grey water, this byproduct requires treatment to protect the environment. The grey water was originally designed to be disposed of using deep well injection technology. Permitting constraints required an alternate approach that was developed under a very tight schedule.
IGCC grey water treatment
Evaporator, crystallizer, reverse osmosis (RO) and press filter technologies
Effluent quality suitable for process reuse (zero liquid discharge)
Dry coolers (fin fans) to minimize cooling tower load