| 摘要 |
PURPOSE: To continuously operate a furnace for a long time without generating the splash of slag and a solid-phase slag which results in closing of the furnace by mounting a plate-Be vortex breaker on the inner wall of the ceiling part and the throttle part of an upper combustion furnace. CONSTITUTION: A coal combustion device is constructed in such a way that pulverized coal is swirled and burnt in a cylindrical combustion furnace 3, ash is captured by a furnace wall by a centrifugal force and dropped onto the bottom part of the combustion furnace 3 and combustion produced gas is supplied outside the furnace 3 via a conical diffuser 6 from the upper throttle part 2 of the combustion furnace 3. A plate-like vortex breaker 1A is mounted on the inner wall of the ceiling part 4 ad the throttle part 2 of the combustion furnace 3. As a result, the swirl flow of gas in the vicinity of the inner wall surfaces of these parts is damped, so that the swirl flow in the combustion furnace 3 is not transmitted to a diffuser 6 or a reductor 7. Thus, pushing-up force due to the gas of molten slag adhering to the wall surfaces of the ceiling part 4 ad the throttle part 2 is suppressed and the molten slag does not reside in the diffuser 6.
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