Ultra low NOx combustion for steam generator
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United States of America Patent
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Jan 10, 2017
Grant Date -
Dec 10, 2015
app pub date -
Jun 4, 2014
filing date -
Jun 4, 2014
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Abstract
A steam generator has a heat exchange chamber with an upstream end and a downstream end. The steam generator further has a burner that injects primary reactants, including fuel and combustion air, into the chamber at the upstream end. A first branch of a once-through water line is located within the chamber downstream of the burner. A second branch of the once-through water line is connected in parallel with the first branch, and is located within the chamber downstream of the first branch. A fuel injector is arranged to inject staged fuel into the chamber at a staged location downstream of the first branch of the once-through water line.
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