| OCR Text |
Show allow for installation of many types of burners with capacities up to 1 M M Btu/h. The top of the furnace is removable to allow access to the furnace chamber. Natural gas, air, oxygen, and load water flow rates and temperatures are measured. Gas analyzers are available for measuring the NOx, CO, CO2, O2, and THC concentrations in the combustion gases. Laboratory-scale tests will include tests with a standard burner, tests with the High Luminosity Burner with no Fuel Preheating Zone, and tests with the High Luminosity Burner over a range of conditions. If successful, the lab-scale testing will be followed by pilot-scale testing on IGT's 3 X 10" Btu/h glass tank simulator and demonstration testing on an oxy/gas fiberglass melting furnace. Conclusions Since tests have not yet been carried out, the following conclusions are based on the modeling studies: • Soot concentration increase from 0.1 to 2.0 volume percent when optimum concentrations of soot precursors are formed in the Fuel Preheat Zone. • Soot concentrations in the fuel and at the furnace inlet are important parameters affecting furnace thermal performance. • At high enough soot concentrations, the thermal efficiency of luminous flames can be increased by 2 5 % with no changes in other parameters. • Flames covering a larger fraction of the glass surface enhance the thermal performance of the furnace. • Short flames are undesirable because they produce highly peaked and non-uniform profiles at the glass surface and create high gas and refractory temperatures. • Increasing soot concentration decreases gas temperature which is expected to lower NOx formation. • Crown temperatures are determined to increase slightly with the addition of soot to an oxy-gas flame. 16 |
