Water Injection System to Reduce NO sigma ub xEmissions

A new high pressure water injection system designed to reduce nitrogen oxide (NOx) emissions from a peaking power plant in New York requires water with an ultra-low silica concentration. The twin-pack Pratt Whitney kerosene-fired engines have a limit of 20 ppb silica in fuel and water entering the turbines. National Grid installed the $4 million high-pressure water injection system and silica analyzer at its largest peaking generation facility on long Island, NY. The new system reduces NOx emissions by 50% to 60%. It automatically injects and mixes ultra-pure, high-pressure water into the kerosene fuel before it reaches the combustion chambers of the twin-pack FT4 aircraft engine generators. When the Navigator 600 analyzer was first put into service, as trailer resin beds neared exhaustion operators found that the silica content in the water going to the storage tank had risen to about 1,600 ppb. Navigator 600 analyzer will automatically initiate water shut-off.