ULTRA LOW NOX BURNER USING DISTRIBUTED DIRECT FUEL INJECTION

摘要

A burner box (100) includes a housing (110), a fuel tube (120) and a porous heat dissipating surface (130). The housing (110) is bounded by a sidewall (112). The sidewall defines an open passage (114) that allows unimpeded vertical airflow. The fuel tube (120) extends into the passage (114) and defines a plurality of spaced apart orifices (122) that distribute fuel into the open passage (114). The fuel tube (120) is at a distance from the top of the housing so that substantially all of the fuel is entrained by the combustion air before the fuel reaches the top. The heat dissipating surface (130) is disposed across the top of the housing (110) and supports a flame. The heat dissipating surface (130) includes enough open area so that the fuel/air mixture passes through the porous heat dissipating surface (130) unimpeded. The heat dissipating surface (130) dissipates heat from the flame and prevents flashback.