| 摘要 |
PROBLEM TO BE SOLVED: To uniformize heat loads in a furnace and to prevent the rise of pipe wall temperature of a water wall pipe of the furnace, in a pulverized coal combustion once-through boiler having burners arranged vertically to the furnace in opposition to the water wall pipe. SOLUTION: This pulverized coal combustion once-through boiler is provided with a water wall of the furnace constituted by vertically arranging the plurality of water wall pipes, the plurality of burners are arranged in opposition to each of the water wall pipes of a boiler front wall and a boiler rear wall at positions of prescribed heights of the furnace, a coal supply pipe for supplying the pulverized coal to a part of the plurality of burners disposed in opposition to the positions of the prescribed height of the furnace from one of a plurality of mills, is branched to the boiler front wall and the boiler rear wall, and connected to a part of the plurality of burners, and further another coal supply pipe for supplying the pulverized coal to a part of the remaining of the plurality of burners arranged in opposition to the position of the prescribed height of the furnace from another mill of the plurality of mills, is branched into the boiler front wall and the boiler rear wall and connected to a part of the remaining burners. COPYRIGHT: (C)2008,JPO&INPIT
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