Compound burner vane

A compound spin vane apparatus for imparting a spin to air flowing past the spin vane apparatus comprising:

• a first vane portion having:
• a leading edge exposed to an oncoming flow of air;
• a trailing edge located downstream thereof with respect to the flow of air as it passes by the first vane portion;
• an inner edge oriented in a substantially parallel relation to the oncoming flow of air;
• an outer edge located opposite the inner edge;
• and wherein the first vane portion is formed as a simple curved planar surface;
• second and third vane portions each having:
• a leading edge exposed to the oncoming flow of air;
• a trailing edge downstream thereof with respect to the flow of air as it passes by the second vane portion;
• an inner edge oriented in a substantially parallel relation to the oncoming flow of air;
• an outer edge located opposite the inner edge;
• and wherein each of the second and third vane portions are formed as simple, curved planar surfaces that are substantially the same simple, curved planar surface as the first vane portion;
• and
• rigid plate means for connecting the first, second and third vane portions in spaced lateral relationship with respect to each other, the plate means being connected to the inner edge of the first vane portion and to the outer edges of the second and third vane portions so that the rigid plate means and the first, second, and third vane portions all move in unison as a single unit.

A fossil-fueled burner apparatus comprising:

• an annular air flow passage of a burner apparatus having an inner wall and an outer wall and combustion air flowing therethrough;
• an arrangement of compound spin vanes, at least one of the compound spin vanes having:
• a first vane portion having a leading edge exposed to the oncoming flow of air, a trailing edge located downstream thereof with respect to the flow of air as it passes by the first vane portion, the first vane portion also having an inner edge, an outer edge located proximate to the outer wall of the annular air passage, and opposite, lateral sides;
• a second vane portion having a leading edge exposed to the oncoming flow of air, a trailing edge downstream thereof with respect to the flow of air as it passes by the second vane portion, the second vane portion also having an inner edge located proximate to the inner wall of the annular air passage, an outer edge, and opposite, lateral sides;
• and means for rigidly connecting one side of the second vane portion to a first lateral side of the first vane portion in spaced lateral relationship with respect to the first vane portion so that both the first and second vane portions move together as a unit with respect to the annular flow passage and wherein the means for rigidly connecting is positioned in the annular air flow passage;
• and
• means for adjusting position of the compound spin vanes to vary the amount of spin imparted to the combustion air flow flowing through the annular air flow passage and past the arrangement of compound spin vanes.