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Oxy-fuel burner restores air-fuel regenerative furnaces to full production

By Chemical Engineering |

Air Products[/caption] Engineers at Air Products (Lehigh Valley, Pa.; www.airproducts.com) have commercialized an improved version of the company’s Cleanfire ThruPort oxy-fuel burner for avoiding downtime during repairs and extending the lifetime of air-fuel regenerative furnaces in glass-making plants. The company’s original Cleanfire ThruPort burner was designed to introduce oxy-fuel combustion (using pure oxygen as the oxidant, rather than air) in air-fuel-fired regenerative glass-melting furnaces. The water-cooled ThruPort burners have a unique design (photo) in which two “nested” lances deliver oxy-fuel (top lance) and staged oxygen (bottom lance) with a mechanism to control the proportion of oxygen between the two. “By separating (staging) a portion of the oxygen away from the main oxy-fuel flame, we can control the rate of mixing between fuel and oxygen in the flame,” says Mark D’Agostini, senior research associate at Air Products. “This leads to flame lengths that can be optimally tailored to the width of the furnace combustion space, and is also a mechanism for reducing NOx emissions.” The recently commercialized ThruPorte version has design improvements that include a means of adjusting the trajectory…
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