| 摘要 |
FIELD: power industry.SUBSTANCE: invention relates to power industry. Pre-mixing burner (1) with air supply duct (21), at least one pilot gas supply duct (23) that includes at least one wall of duct (39) directed to air supply duct (21) and one pilot gas outlet end (29) entering air supply duct (21), with ignition element (35) located in air supply duct (21) opposite to flow direction to pilot gas outlet end (29), wall of duct (39) for supply of pilot gas (23) opposite to the flow direction to ignition element (35) includes at least one gas outlet hole (37) and with that, pilot gas supply duct (23) in the flow direction of at least one gas outlet hole (37) includes flow resistance (41, 43, 47, 49, 51, 55), and with that, flow resistance is made by constriction (41, 43, 47, 49) of pilot gas supply duct (23); the constriction is made by means of projection (47, 49) located on the wall of duct (39) and directed inwardly, or the constriction is made by means of sleeve (41) installed in duct (23) and reducing the duct cross-section, or the constriction is made by means of element (51, 55) installed in duct (23) and reducing the duct cross-section, and at least one pilot gas supply duct is made in the form of at least one pilot gas tube (23) that is located in cavity (19) of burner (1) and that leaves cavity (19) at the point located opposite the flow direction to ignition element (35) and enters air supply duct (21); with that, the tube wall forms the duct wall, and at least one gas outlet hole (37) is located in section (27) of pilot gas tube (23), which enters air supply duct (21).EFFECT: invention allows designing a burner that has a lighting-up sequence that makes a proper ignition burner unnecessary.6 cl, 9 dwg |
