TH44625B - Burner for gas turbine - Google Patents

Abstract

DC60 A premixed burner, such as for gas turbines, having a conical swirl generator (1) and a cylindrical mixture (2) that are directed in the direction of flow. It comprises a high-pressure atomizing nozzle (10) and one or more fuel feeding passages. The high-pressure atomizing nozzle (10) comprises at least two outlet passages through which liquid fuel enters the swirl generator (1). These passages are arranged off-center with respect to the longitudinal axis of the nozzle and are modified such that the fuel spray cone (11) is oriented at an angle (beta) with respect to the longitudinal axis of the swirl generator (1) that is less than half the angle (alpha) of the swirl generator (1). In particular, the outlet passages have an internal geometry that has a narrow, conical section. A premixed burner, such as for gas turbines, having a conical swirl generator (1) and a cylindrical mixture (2) that are directed in the direction of flow. It comprises a high-pressure atomizing nozzle (10) and one or more fuel feeding passages. The high pressure atomizing nozzle (10) comprises at least two outlet passages through which the liquid fuel enters the vortex generator (1). These passages are arranged off-center with respect to the longitudinal axis of the nozzle and are modified such that the spray cone (11) of fuel is oriented at an angle (beta) with respect to the longitudinal axis of the vortex generator (1) which is less than half the angle (alpha) of the cone of the vortex generator (1). In particular, the outlet passages have an internal geometry which has a narrow, conical section.

Claims (6)

Claims (all) that will not appear on the advertisement page: 1. Pre-mix burner Along with the eddy current generator (1), which consists of a cone outer shell (4a-4d) and a conical half-angle (alpha) and mixing part (2), which follows the eddy current generator (1), loud This is seen in the direction of flow and expands into the inner space (3) of the combustion chamber and has a passage (6) for feeding the compressed combustion air into the eddy current generator. (1) and has a high-pressure nozzle (10) for spraying liquid fuel with at least one fuel passageway for The fuel is fed into the inner spaces (20,32) of the high-pressure nozzles (10). The high-pressure nozzles (10) have at least two throughlet channels (22, 34, 34 \ '), which are connected. Since the inner gap (20, 32) of the high pressure nozzle (10) goes to the inner gap of the eddy current generator (1) and is arranged outside. The center is relative to the longitudinal axis (5) of the nozzle (10) and is directed in such a way that the spray cone (11), which passes through the outlet (22, 34, 34 \ ') has been directed on the trace. Of each cone outer shell with a characteristic through which the outlet passages (22,34, 34 \ ') are designed in such a way that That is, the spray cone (11), which comes out, each has an angled longitudinal axis (beta) relative to the longitudinal axis (5) of the eddy current generator, which is smaller than the angle of half the cone. (Alpha) of the eddy current generator (1) 2. The pre-mixed burner, as claimed in claim 1, is characterized by the angle (beta) between the longitudinal axes (26, 37) of The spray cone (11) and the longitudinal axis (5) of the eddy current generator (1) are smaller than the half-cone (alpha) angle of the eddy current generator (1) and more than 10 degrees. The advance, as claimed in claim 1, is characterized by the angle (beta) between the longitudinal axis (26, 37) of the spray cone (11) and the longitudinal axis (5) of the eddy current generator. (1) in the range from 10 degrees to 18 degrees 4. The pre-mix burner as claimed in claim 1, with the characteristics that Two or more outlet openings (24, 25, 34, 34 \ ') for spraying fuel. It is arranged in the outer radial half of the high pressure recoil (10) against the longitudinal axis (5) of the high pressure nozzle (10) and the rotational symmetry relative to the longitudinal axis of the nozzle. Such high pressure (10) 5. The pre-mixed burner referred to in any of Clause 1 to 4, with a characteristic through which the exit channel (22, 34, 34 \ ') when Look at the flow direction of the liquid fuel. There are first cylindrical sections (23, 35), narrower conical sections (24, 36) and second cylindrical sections (25, 37). In advance, as claimed in Clause 5, with the characteristics that The outlet passage has a pipe (34) extending from the tip of the high-pressure nozzle (10). 7. The pre-mixed burner, as referred to in claim 5, is characterized by the Throughout the outlet, a tube (34 \ ') extends beyond the outer surface of the high-pressure nozzle (10), the tip of the high-pressure nozzle (10) extends into the eddy current generator further. Pipe (34 \ ') 8. The pre-mixed burner, as claimed in claim 5, is characterized in that the half-corner (delta) of the section is narrowed, conical (36) between the walls of the part. Conical (36) and longitudinal axis (38) of the exit passage (3 4. 34 \ ') is less than 45 degrees 9. Pre-mixed burner, as claimed in claim 5, with characteristics. which The second cylindrical section (25) in each case continues to pass through the outlet (26) on the matte surface. Outside of the high-pressure nozzles (10) 1 0. The pre-mixed burner referred to in claim 5, with the characteristics that The narrow cone (24) has a half cone angle ranging from 30 degrees to 45 degrees 1. 1. The pre-mixed burner, as claimed in Clause 6-10, is characterized by a characteristic that the tip of the high-pressure nozzles (10) has a rounded shape 1. 2. The pre-mixed burner, as referred to in Clause 6-10, is characterized by the characteristic that the apex of the high-pressure nozzles (10) has a conical shape 1. 3. The pre-mixed burner, as claimed in claim 5, with the characteristics that The length of the second cylinder episode (25, 37) in each case is at most five times that of Diameter of outlet opening 1 4. The pre-mixed burners, as claimed in Clause 1-13, are characterized by the characteristics in which the outlet opening (25) of the through-out passage has a diameter range from 0.5 to 1.5 mm. 1 5. The pre-mixed burner, as claimed in Clause 1-14, is unique in that the pre-mixed burner has an opening (14) for the intake of compressed air in the outer wall. Of the cylinder mixing episode (2) 1 6.Pre-mixed burner with vortex generator consisting of outer shell. Of the cone and expand into the inner space of the combustion chamber. And there is a pass for entry The combustion air is compressed into the eddy current generator. And has a high-pressure nozzle (10) for spraying liquid fuel with one or more fuel passages. For infestation Fire enters the inner spaces (20, 32) of the high-pressure nozzles (10) and the high-pressure nozzles (10). At least two outlets (22, 34, 34 \ ') are connected. Since the inner cavity (20, 32) of the high pressure nozzle (10) goes to the internal gap of the eddy current generator (1) and is provided. The off-center relative to the longitudinal axis of the nozzle (10) is characterized by the fact that the outlet (22, 34, 34 \ ') is designed in such a way that the spray cone (11), which comes out each There is an angled longitudinal (5) axis (beta) relative to the longitudinal axis of the pre-mixed burner, which is smaller than the half-cone angle (alpha) of the eddy current generator and through the outlet (22, 34, 34 \ ') When looking at the direction of flow Liquid fuel has one cylindrical section (23, 35), a narrow cone (24, 36), and a second cylindrical section (25, 37) and a high pressure nozzle (10) protrusion. To or thousand From half the length of the internal gap of the eddy current generator