
460 Oxygen-Enhanced Combustion
developed and tested. As will be shown, these did not
reduce NO
x
emissions as much as the EZ-1 congura-
tion. Figure 18.29 is a drawing of the EZ-3A congura-
tion, consisting of an annular design with a full are
between the middle oxygen passage and the outer air
passage. Figure 18.30 shows the effect of the length of
the burner block on NO
x
emissions. For this design, the
shorter the block the lower the NO
x
emissions. Figure
18.31 shows a similar burner design with only a half
are between the oxygen and air passages. Figure 18.32
generally shows that the larger internal burner block
diameter and the shortest ...