| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil-fired burner capable of: securing combustibility during oil burning; and preventing or suppressing a secondary air, which is charged from the oil-fired burner when solid fuel such as pulverized coal is burned, from being diffused toward an outer periphery of flame, at an early stage. <P>SOLUTION: An oil-fired burner 30A for warming is disposed adjacent to an outer periphery of a pulverized coal burner for charging pulverized coal and air into a furnace, and is provided with an oil gun 32 disposed at the center of an outlet opening of a nozzle body 31 having an approximately rectangular cross section for charging oil fuel, and a secondary air charging port 40 provided so as to surround an outer periphery of the oil gun 32. The secondary air charging port 40 is formed of a central arc part 41 approximately similar in shape to a circular diffuser 34 attached to a leading end side of the oil gun 32, and rectangular parts 42L and 42R arranged continuously at both sides of the central arc part 41 and narrowing a space between surfaces in an adjoining direction so that a distance from the pulverized coal burner is increased. <P>COPYRIGHT: (C)2013,JPO&INPIT |
