Transient heating burner and method

摘要

A transient heating burner including at least two burner elements each having a distribution nozzle configured to flow a fuel, and an annular nozzle surrounding the distribution nozzle and configured to flow an first oxidant, at least one staging nozzle configured to flow a second oxidant, and a controller programmed to independently control the fuel flow to each distribution nozzle such that at least one of the distribution nozzles is active and at least one of the distribution nozzles is passive, wherein an active distribution nozzle fuel flow is greater than an average fuel flow to the distribution nozzles and a passive nozzle fuel flow is less than the average fuel flow, and to control a staging ratio to be less than or equal to about 75%.

主权项

1. A transient heating burner comprising:
at least two burner elements each comprising:
a distribution nozzle configured to flow a fuel; andan annular nozzle surrounding the distribution nozzle and configured to flow a first oxidant; at least one staging nozzle configured to flow a second oxidant; and a controller programmed:
to independently control the fuel flow to each distribution nozzle such that at least one of the distribution nozzles is active and at least one of the distribution nozzles is passive, wherein fuel flow in an active distribution nozzle is greater than an average fuel flow to the distribution nozzles and fuel flow in a passive distribution nozzle is less than the average fuel flow to the distribution nozzles; andto control a staging ratio to be less than or equal to about 75%, wherein the staging ratio is the ratio of the oxygen contained in the second oxidant flow to the sum of the oxygen contained in the first and second oxidant flows.