Low NOx, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system
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United States of America Patent
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Jun 21, 2022
Grant Date -
Nov 7, 2019
app pub date -
Jun 28, 2019
filing date -
Sep 25, 2014
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Abstract
Embodiments of the present invention include high-temperature staged recirculating burners and radiant tube burner assemblies that provide high efficiency, low NOx and CO emissions, and uniform temperature characteristics. One such staged recirculating burner includes a combustion tube having inside and outside helical fins forming opposing spiral pathways for combustion gases and products of combustion, a combustion nozzle coupled to the combustion tube, a gas tube running axially into the combustion tube, and a staging gas nozzle coupled to the gas tube, where the staging gas nozzle includes radial exit holes into the combustion tube and an axial gas staging tube extending into the combustion nozzle to stage combustion.
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