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The World Leader inEnergy Plant TechnologyWe provide the best quality energy equipment with the best engineering and services.
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- Firing Systems
- Arch-Fired Burners
Arch-Fired Burners
Advanced Solution for Low Volatile Fuels
Reliable and flexible solution for low volatile coal
BHI-FW has supplied over 70 Arch-Fired Boilers, about 2/3 of the world’s installed base, for burning low rank coals including Anthracites, Semi-Anthracites, low volatile bituminous coals and pet cokes. Our unique design incorporates more than a dozen patents related to the Arch-Fired combustion system, which delivers higher plant efficiency and lower NOx emissions with our proprietary Down-shot burners and OFA system designs. Arch-Fired Boilers are an excellent alternative to consider when faced with the need to effectively accommodate combustion of different grades of low rank, low reactivity coals.
Designed Features of Arch-Fired Boiler
- Down-shot Firing for longer Residence Times
- Refractory lined lower furnace for flame stability
- Double cyclone burners for high carbon burnout of Low-Volatile Fuels
- Cyclones vent to a dual-zone overfire air system to minimize NOx and CO
- Vertical tube wall easy for erection, maintenance and repair
Double Arch Fired Boiler
Down Fired Burner Arrangement
Cyclone Burner Control Flexibility
The BHI-FW Down-shot burner uses a dual cyclone arrangement to accurately control the admission of coal into the furnace. Flame optimization is accomplished by a combination of vent damper and burner core adjustments that control the rate of burn in the overfire air system and the shape of the main flame. Together these adjustments are used to minimize NOx, CO and Unburned Carbon.
Cyclone Burner Design Features
- Patented Fuel Preheat Nozzle enhances control of ignition points
- Adjustable Cores allow flame length to be optimized
- Vented cyclones allow for fuel staging in the OFA system
- Dual Zone OFA ports stage airflow for NOx control
