Gerald Gentleman Unit 1

Gerald Gentleman Unit 1

Location: Sutherland, Neb.

Client: Nebraska Public Power District

Completion Date: 2006

Burns & McDonnell supported the Nebraska Public Power District's (NPPD’s) efforts with its burner equipment system project performed at Gerald Gentleman Station Unit 1 (GGS1) near Sutherland, Neb.

NPPD initiated a combustion improvement project that included new replacement burners, control equipment and an overfire air system. The main goal of the project was to improve combustion and operation of the boiler. The resulting NOx emission rate is 50 percent lower with the new combustion equipment.

  • Computational fluid dynamic (CFD) modeling
  • Overfire air system design
  • Low NOx burner design
  • Procurement of all equipment and materials
  • Combustion tuning

The original GGS1 burners were no longer adjustable after years of operation while the existing overfire air system was antiquated and unproductive in terms of reducing NOx emissions, controlling carbon monoxide (CO) emissions and completing combustion. NPPD choose to upgrade the burner system and simultaneously install a new overfire air system based on detailed computational fluid dynamic (CFD) modeling results.

The engineering process used to execute this project is a demonstration of how modern technology can be harnessed to produce optimized combustion and reduced emissions. Burns & McDonnell’s scope included engineering, procurement, field support, startup and combustion optimization services.

The results of this project have been notable in the owner's operation of the unit. Boiler backpass fouling has improved significantly. Combustion has improved while reducing NOx emissions and giving the owner better control of the unit over the load range.

  • Computational fluid dynamic (CFD) modeling
  • Replacement burners
  • Overfire air system
  • Combustion optimization