Oxy-Firing Tests in a Simulated Process Heater

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Title Oxy-Firing Tests in a Simulated Process Heater
Creator Jamaluddin, Jamal; Lowe, Cliff; Brancaccio, Nick; Erazo, Jaime; Baukal, Charles E. Jr.; Patel, Rasik
Date 2012-09-06
Abstract Oxy-firing tests were performed in a simulated process heater as part of a range of activities sponsored by the 3rd phase of the CO2 Capture Project (CCP3). The work was performed at the test facility of John Zink Company in Tulsa, Oklahoma. The objective of the tests was to evaluate the feasibility of utilizing commercial process heater burners for oxy-firing, and to compare burner performance with conventional air-firing. Two different vintages of John Zink low-NOx burners were used in the tests, and two fuel types (natural gas and a simulated refinery fuel gas) were fired. The burner performance under oxy-fired conditions was very similar to that for air-firing; however, small changes in the heat flux profile were observed. The most striking observation was that the heater took a long time (a few hours) to reach a steady nitrogen content in the flue gas ( 15% - 20% range on a wet basis). The high leakage into the firebox was an artifact of higher vacuum levels due to the presence of a boiler upstream of the ID fan to re-circulate the flue gas into the oxidant stream, which created significant backpressure which the fan had to overcome. Under oxy-firing conditions, NOx emissions decreased approximately 50% and 70% for the COOLstar and PSFG burners, respectively. Further reductions were not possible due to the availability of nitrogen in the test furnace. The effect of leakage was lower when the test furnace was operated at lower negative pressure; however, the amount of air leakage will be highly dependent on how well the furnace is sealed.
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ARK ark:/87278/s6qf8wh1
Setname uu_afrc
Date Created 2013-02-12
Date Modified 2021-05-06
ID 14317
Reference URL https://collections.lib.utah.edu/ark:/87278/s6qf8wh1