HOT-BULB IGNITION BURNER Russian patent published in 2004 - IPC

FIELD: hot-bulb ignition burners. SUBSTANCE: hot-bulb ignition burner has combustion chamber accommodating hot-bulb igniter and liquid fuel or fuel-air mixture supply channel both spaced through certain angle apart; hot-bulb igniter disposed in locating unit and made, for in stance, in the form of glow plug is placed in coaxial protective bushing whose inner diameter ranges within d_i≤ d_b≤3d_i,, where d_b is inner diameter of protective bushing; d_i is diameter of hot-bulb igniter. Protective bushing whose outer diameter equals inner diameter of combustion chamber may be built integral with locating unit of hot-bulb igniter or it may be built integral with combustion chamber. Hot-bulb igniter locating unit has through holes communicating with combustion chamber. Installed at inlet of liquid fuel or air-fuel mixture supply channel is injector; liquid fuel or air-fuel mixture supply channel is made in the form of tube bend with sudden expansion section upstream of combustion chamber. Mentioned channel may be made in the form of two coaxial stepping bushings installed at certain angle to hot-bulb igniter axis; bushing of smaller diameter installed for axial displacement relative to bushing of larger diameter accommodates fuel injector and through holes are made in side surface of larger-diameter bushing. Disk or perforated plate is mounted at combustion chamber outlet. Hot-bulb ignition burner is provided with main burner coaxially mounted on inlet end of combustion chamber and with tube connected on one end with hole made in bottom part of combustion chamber in vicinity of disk and its other end is inserted in main burner inner space. Tube section connected to main burner accommodates additional tube mounted in a radially spaced relation which communicates with compressed air source. EFFECT: enhanced reliability of producing ignition flame when using air injectors in burners designed for instance to start boilers. 8 cl, 5 dwg