Pulverized coal combustion boiler

A pulverized coal combustion boiler comprising:

• a furnace;
• a plurality of water pipes arranged on the furnace such as to form a water pipe wall of the furnace;
• a furnace front wall and a furnace rear wall facing the furnace front wall to form the water pipe wall of the furnace having the water pipes;
• a plurality of burners arranged on the furnace front wall and the furnace rear wall for supplying pulverized coal into the furnace;
• a plurality of mills for pulverizing coal fuel to produce the pulverized coal;
• and
• pulverized fuel pipes arranged for supplying the pulverized coal produced by the mills to the plurality of burners, characterized in that
• the plurality of water pipes are arranged substantially vertical direction to constitute the water pipe wall of the furnace,
• the plurality of burners are arranged to face each other on the water pipe walls of the furnace front wall and the furnace rear wall at positions of a predetermined height of the furnace,
• the pulverized fuel pipes for supplying the pulverized coal from one of the plurality of mills to some of the plurality of burners facing each other at the positions of the predetermined height of the furnace are arranged on the water pipe wall surface to branch out into the furnace front wall and the furnace rear wall and connect to the some of the plurality of burners, and
• other pulverized fuel pipes for supplying the pulverized coal from another one of the plurality of mills to the remaining plurality of mills facing each other at the positions of the predetermined height of the furnace are arranged on the water pipe wall surface to branch out into the furnace front wall and the furnace rear wall and connect to the remaining plurality of burners.

A power plant having a pulverized coal combustion boiler, the power plant providing 500 MW to 1100 MW electric power, the pulverized coal combustion boiler comprising:

• a furnace;
• a plurality of water pipes arranged on the furnace such as to form a water pipe wall of the furnace;
• a furnace front wall and a furnace rear wall facing the furnace front wall to form the water pipe wall of the furnace having the water pipes;
• a plurality of burners arranged on the furnace front wall and the furnace rear wall for supplying pulverized coal fuel into the furnace;
• a plurality of mills for pulverizing coal to produce the pulverized coal;
• and
• pulverized fuel pipes arranged for supplying the pulverized coal produced by the mills to the plurality of burners, characterized in that
• the plurality of water pipes are arranged substantially vertical direction to constitute the water pipe wall of the furnace,
• the plurality of burners are arranged to face each other on the water pipe walls of the furnace front wall and the furnace rear wall at positions of a predetermined height of the furnace,
• the pulverized fuel pipes for supplying the pulverized coal from one of the plurality of mills to some of the plurality of burners facing each other at the positions of the predetermined height of the furnace are arranged on the water pipe wall surface to branch out into the furnace front wall and the furnace rear wall and connect to the some of the plurality of burners,
• other pulverized fuel pipes for supplying the pulverized coal from another one of the plurality of mills to the remaining plurality of mills facing each other at the positions of the predetermined height of the furnace are arranged on the water pipe wall surface to branch out into the furnace front wall and the furnace rear wall and connect to the remaining plurality of burners;
• and
• at least one of an air heater, an electrostatic precipitator, and a bag filter are disposed at the downstream of the pulverized coal combustion boiler for flowing down an exhaust gas discharged from the pulverized coal combustion boiler.