| 摘要 |
PROBLEM TO BE SOLVED: To control the flow of pneumatically-conveyed pulverized coal in each distribution branch pipe into a target flow rate, and to prevent regulation pipes from interfering with each other and control for pulverized coal to be blown into a blast furnace from becoming unstable. SOLUTION: A distribution device comprises: a tubular body 1 for introducing a flow of the pneumatically-conveyed pulverized coal conveyed from a conduit 11, inside from the center of a lower part, colliding the flow with the central part of an inner surface 13a of a circular wall 13 at the upper end, radially dividing the flow and shifting the direction, descending the flow along the inner surface 14a of the side peripheral wall 14, and sending the flows out through openings 15 arranged at appropriate positions of the side peripheral wall 14 at predetermined spacings; the distribution branch pipes 2 for supplying the flow of the pneumatically-conveyed pulverized coal which flows out through the respective openings 15 provided in the tubular body 1, to a tuyere 30 of the blast furnace 29; and the regulation pipe 3 which is inserted and installed in the respective distribution branch pipes 2 so as to be able to move in the tubular body 1 along a diametrical direction of the tubular body 1. The maximum value (L<SB>max</SB>) of a length (L) up to which the respective regulation pipes 3 can be protruded into the tubular body 1 is set at 50 [mm] or less. COPYRIGHT: (C)2007,JPO&INPIT
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