Co-Fyr Burner

Reduces NOx, CO, SO2 and particulate Burns cheaper coal Smokeless light-off Achieves higher turndown Increases reliability Reduces boiler excess air

Co-Fyr Burner Enhances Stoker Firing

Coen's Co-Fyr burner will bring new life to aging industrial and utility stoker boilers. The Co-Fyr burner utilizes small amounts of clean burning natural gas to enhance solid fuel performance. If your boiler uses coal, wood waste, municipal solid waste or other opportunity fuels, the Co-Fyr burner will greatly improve your operations.

Improved efficiencies, reduced emissions, and superior operations are just a few reasons why manufacturers, hospitals, utilities and energy service companies are turning to cofiring.

Innovation

Innovative computer modeling is used extensively to assure optimal performance. Coen engineers model to accurately determine burner spacing, height above grate, burner/grate mixing, and furnace temperature profiles. Coen's innovation and expertise assures a successful job right from initial design to installation.

Performance

The Co-Fyr's compact design is perfect for tight field retrofits. The small burner throat diameter reduces boiler tube bending and helps position the burner around boiler obstructions. Its high throat velocity produces excellent furnace penetration and turbulent mixing to reduce particulate. The isokinetic spinner and center gas spud provide superior stability, wide turndown and low excess air operation.

Savings

The cost of cofiring natural gas with a Coen Co-Fyr burner is highly attractive. Economic benefits are realized through avoided capital and maintenance costs and from increased efficiency. Bonus benefits include lower excess air, increased carbon burnout and enhanced equipment life.

How the Co-Fyr Burner Works

The Co-Fyr burner fires gas or liquid fuels through one or more burners located several feet above the solid fuel grate. The high momentum burner penetrates the furnace cross section and generates a turbulent mixing pattern, breaking furnace channels, providing uniform heat distribution and improving solid fuel combustion.

Placing two Co-Fyr burners in a staggered configuration on opposite boiler walls creates a vortex that promotes optimum mixing and heat distribution to reduce the load per unit area on the grate.

The Benefits of Coen's Co-Fyr Burner

Since the Co-Fyr package is everything you need in a burner system, your specifying process is simplified. With a dedicated burner line designed for application on boilers sizes 25,000 to well over 300,000 lbs steam/hour, the Coen Co-Fyr provides the following benefits:

 

Lower Emissions Eliminates opacity excursions Reduces NOx, CO, SO2 and particulate Avoids Title V permit requirements Avoids costly electrostatic precipitators Superior Operation Responds to rapid load swings Recovers derated boiler capacity Reduces plant maintenance Faster warm-up Smokeless light-off Achieves higher turndown Increases reliability Improved Efficiency Reduces boiler excess air Increases carbon burnout Enhances heat transfer Improves ash collection Burns cheaper coal

Experience

A Forest Products Company in the Northwest

Coen supplied two natural gas Co-Fyr burners on a Zurn 90,000 PPH wood-waste stoker. As a cogeneration facility, the site must maintain reliable output for power production. Recently, they experienced production losses due to poor quality and shortages in the wood fuel supply. The site previously considered adding conventional gas burners for back-up to wood waste fuel. When they discovered they could utilize the simpler Co-Fyr technology to improve their boiler performance firing wet wood, they jumped at the opportunity. Today the system runs smoothly and they are planning to convert a second boiler to Coen Co-Fyr burners.

A Municipal Power Plant in Ohio

Coen supplied two natural gas Co-Fyr burners for operation on a coal fired B&W 165,000 PPH (17 MW) spreader stoker boiler. The Co-Fyr burners operate at only 10% capacity, minimizing the fuel cost differential between natural gas and coal. The primary incentive for cofiring was to recover lost derate and improve general operation. The plant was having excess opacity excursions above 150,000 PPH compounded by variations in coal quality. The two burners were placed in opposite boiler sidewalls in the typical staggered arrangement,. The conversion was a success and benefits include opacity control, a 1.5 MW derate recovery, tolerance of low spec coal, and an increase in boiler efficiency of 1 to 2%.

A Manufacturing Plant in Ohio

Coen supplied two natural gas Co-Fyr burners for operation on a coal fired Wickes 75,000 PPH chain grate stoker boiler. The boiler supplies 150 PSIG saturated steam to heat the complex and provide process load. Fluctuating outdoor temperatures and varying process steam demand caused large swings in load demand resulting in a smoky stack. The solution was to base load the coal feed rate and have the Co-Fyr burners handle the load swings. Benefits of cofiring at this plant are reduced NOx and SO₂ emissions below the 100-tons/year threshold for Title V, back-up on gas, improved efficiency, improved opacity under all, and the load following capability.

For more information about this product, talk to your nearest Coen Sales Representative.

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