JP2003329216A5 - - Google Patents

Claims (10)

A combustion cylinder having an upstream opening for supplying liquid fuel and air, and a downstream opening from which a high-temperature combustion gas flow is ejected;
A fuel injection device that atomizes liquid fuel and injects the fuel into the combustion cylinder from the upstream side opening of the combustion cylinder;
Combustion air supply means that is disposed around the fuel injection device and supplies combustion air to the inside of the combustion cylinder through the upstream side opening of the combustion cylinder;
Burner consisting of A fuel injection device that transports liquid fuel; a fuel injection nozzle that is provided at the tip of the fuel tube and injects into the combustion cylinder in a mist form at a substantially central position of the upstream opening of the combustion cylinder; Including,
Combustion air supply means, primary air supply means for supplying high pressure primary air from the periphery of the fuel injection nozzle of the fuel injection device to the inside of the combustion cylinder through the upstream opening,
2. The burner according to claim 1, further comprising secondary air supply means for supplying low-pressure secondary air to the inside of the combustion cylinder from the outside of the primary air supply means through the upstream opening for main combustion.   The primary air supply means includes a cylindrical primary air supply cylinder that forms a ring-shaped primary air nozzle around the fuel injection nozzle and around the outer periphery of the fuel pipe end, and at the upstream end wall of the primary air supply cylinder The burner according to claim 2, wherein the fuel injection nozzle is fixed.   The secondary air supply means includes a cylindrical secondary air supply case that passes through the upstream end wall having an opening at the center and fixes the primary air supply cylinder to surround the primary air supply cylinder. The burner according to claim 3, wherein the secondary air supply case forms an annular secondary air nozzle with the tip of the primary air supply cylinder.   The burner according to claim 3, wherein the fuel injection pipe has a plurality of oblique guide vanes protruding from the primary air nozzle between the primary air supply tube and the outer peripheral surface of the tip portion in the vicinity of the fuel injection nozzle.   The burner according to claim 1, wherein the combustion cylinder is provided with a cooling channel through which water or air is circulated on a peripheral wall thereof.   The combustion cylinder is provided with a cooling flow path for circulating air on its peripheral wall, the outlet of the cooling flow path is connected to the primary air supply means via a conduit, and the high pressure air is supplied to the inlet of the cooling flow path for cooling. The burner according to claim 1, wherein the air flowing through the flow path is supplied as primary air from the outlet to the primary air supply means.   The cooling channel is formed in two layers, an outer side and an inner side, which surround almost the entire peripheral wall of the combustion cylinder, is folded at the downstream opening of the combustion cylinder, and is supplied from the inlet of the outer cooling channel to the inner layer The burner according to claim 6 or 7, wherein the burner is discharged from an outlet of the cooling channel.   The burner according to any one of claims 1 to 8, wherein the combustion cylinder is lined with a refractory.   The burner according to any one of claims 1 to 9, wherein an inner surface of the combustion cylinder is provided with a bulge on the upstream side in an axial symmetry with respect to the axis, and is tapered toward the downstream opening.