Burner having a cast dielectric electrode holder

摘要

A burner may include a dielectric body configured to hold one or more electrodes in proximity to a combustion reaction. The dielectric body may be cast from a refractory material. The one or more electrodes may be cast into the dielectric body. The dielectric body and the electrodes may be configured for installation, removal, and replacement as a unit.

主权项

1. A burner configured for application of electrical energy to a combustion reaction, comprising:
a combustor wall disposed to at least partially bound a combustion volume to separate the combustion volume from an external volume; at least one fuel nozzle configured to output a stream of fuel into the combustion volume to support a combustion reaction in the combustion volume; at least one air flow passage configured to at least allow air to enter the combustion volume to support the combustion reaction; a dielectric body extending at least partly into the combustion volume, the dielectric body being formed from a cast refractory material; and one or more electrodes extending substantially through the dielectric body, the one or more electrodes being configured to convey electrical energy from the external volume to a location proximate to or coincident with the combustion reaction; wherein a protuberant section of at least one of the electrodes is positioned inside the combustion volume so as to be in direct contact with a flame.