Abstract: A combustion burner includes a fuel nozzle configured to blow in fuel gas of solid fuel and air, a combustion air nozzle configured to blow in air from the outside of the fuel nozzle, and at least one flame stabilizer arranged on the axial center side at a distal end of the fuel nozzle. The flame stabilizer is arranged at the distal end, and has a flame stabilizing member whose width increases in a direction toward the distal end, and a straightening vane having a plate shape and being arranged on an extension of the flame stabilizing member on the upstream side in a flow direction of the fuel gas. An abrasion-resistant member is arranged on a wide width surface of the flame stabilizer, and an abrasion-resistant member is arranged on at least a part of the straightening vane.

Abstract: An object is to provide a decompression device including a plurality of stages of orifice plates disposed in a flow passage, which generates less noise in response to sonic feedback phenomenon and gas-column resonance. A decompression device 10A includes: an upstream orifice plate 14 disposed in a duct 12 forming a flow passage for a fluid F; and a downstream orifice plate 16 disposed in the flow passage and downstream of the upstream orifice plate 14. A jet-flow interference part 22A is disposed only partially on an outlet rim portion of an orifice 18 on the upstream orifice plate 14 and configured to interfere with a jet flow discharged from the orifice 18. Positions of Karman vortices e are differentiated in a duct axial direction between regions with and without the jet-flow interference part 22A to reduce generation of noise.

Abstract: A combustion burner includes a fuel nozzle configured to blow in fuel gas of solid fuel and air, a combustion air nozzle configured to blow in air from the outside of the fuel nozzle, and at least one flame stabilizer arranged on the axial center side at a distal end of the fuel nozzle. The flame stabilizer is arranged at the distal end, and has a flame stabilizing member whose width increases in a direction toward the distal end, and a straightening vane having a plate shape and being arranged on an extension of the flame stabilizing member on the upstream side in a flow direction of the fuel gas. An abrasion-resistant member is arranged on a wide width surface of the flame stabilizer, and an abrasion-resistant member is arranged on at least a part of the straightening vane.

Abstract: A water-containing solid fuel drying apparatus that can efficiently dry with low energy consumption by effectively utilizing sensible heat and latent heat of a heating medium for drying, etc. is provided.

Abstract: An object is to provide a decompression device including a plurality of stages of orifice plates disposed in a flow passage, which generates less noise in response to sonic feedback phenomenon and gas-column resonance. A decompression device 10A includes: an upstream orifice plate 14 disposed in a duct 12 forming a flow passage for a fluid F; and a downstream orifice plate 16 disposed in the flow passage and downstream of the upstream orifice plate 14. A jet-flow interference part 22A is disposed only partially on an outlet rim portion of an orifice 18 on the upstream orifice plate 14 and configured to interfere with a jet flow discharged from the orifice 18. Positions of Karman vortices e are differentiated in a duct axial direction between regions with and without the jet-flow interference part 22A to reduce generation of noise.

Abstract: A multistage pressure reduction device (10) of the present invention includes a fuel pipe (1) forming a flow path (5), an upstream orifice plate (2) disposed in the flow path (5), and a downstream orifice plate (3) disposed downstream of the upstream orifice plate (2) in the flow path (5). The upstream orifice plate (2) is formed such that a jet flow (7-i) discharged from a hole (6-i) formed at the upstream orifice plate (2) contacts a certain target. With this multistage pressure reduction device (10), the jet flow (7-i) discharged from the upstream orifice plate (2) contacts the certain target to prevent air column resonance excited between the upstream orifice plate (2) and the downstream orifice plate (3). Noise due to the air column resonance can be reduced without providing a porous metal between the upstream orifice plate (2) and the downstream orifice plate (3).

Abstract: A water-containing solid fuel drying apparatus that can efficiently dry with low energy consumption by effectively utilizing sensible heat and latent heat of a heating medium for drying, etc. is provided.