Benefits of CFD Modeling

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• Reduces costs—CFD modeling allows designers to predict results before installation, avoiding costly errors

• Saves time—CFD modeling eliminates time consuming on-site trial and error situations

• Provides detailed insights—CFD modeling gives insight into furnace operation that cannot be obtained through testing/measurement

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Our Experience

CFD modeling is used to: 1) validate the baseline furnace combustion performance and 2) facilitate design of the air pollution control system for a particular unit.

 

We have developed our own modeling team and capabilities. The types of models include: 1) non-reacting flow; 2) fuel combustion and reacting flow; and 3) pollutant formation (i.e., NOx, SOx, LOI, CO, etc), with fuel ranging from coal, biomass, oil to natural gas. We have also analyzed a wide range of boiler types from pulverized fuel (p.f.) boilers (tangential or wall-fired) with a wide range of burners to fluidized bed and stoker units. Our models have addressed a variety of chemical-reacting flows associated with fuel combustion and reacting flow:

• Solid fuel combustion chemistry (devolatilization, char oxidation kinetics)

• Gas volatiles (i.e. gaseous fuel) combustion

• CO finite rate chemistry

• Soot formation chemistry (heavy oil combustion)

• NOx formation chemistry (thermal NOx, fuel-N conversion chemistry)

• SOx formation chemistry (SO2 and SO3) and reduction by limestone (CaO+SO2)

• Urea and ammonia chemistry to reduce NOx

• Sorbent chemistry for SO2, Mercury, and HCl capture.

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RAS’s PhD level experts have modeled over 100 models on a wide variety of boiler configurations:

• Circulating fluidized bed (CFB)

• Tangential-fired

• Wall-fired

• Cyclone

• Stoker/grate fired

• Kilns

• Various burner types

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and fuel types:

• Variety of coals

• Biomass

• Biomass co-fired with coal

• Waste products

• Oil

• Natural Gas

• Waste and landfill gases