| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boiler system etc. efficiently and inexpensively reducing a moisture content of fuel comprising coal having a high moisture content such as peat and brown coal, and suppressing increase in the cost of facilities and pulverizing power. <P>SOLUTION: The boiler system includes a coal-fired boiler 124 having a plurality of burners 15, in which coarse coal and pulverized coal are introduced in separate systems to the burners 15. The coarse coal supply system includes: a high-temperature carrier gas pipe line 105 for introducing a carrier gas via a gas preheater (AH) 18 to the burner 15; a low-temperature carrier gas pipe line 106 branched from the pipe line 105 at a pre-flow side of AH 18; a high-temperature carrier gas pipe line 109 branched from the pipe line 105 at a post-flow side of AH 18 and connected to the pipe line 106; and pipe lines 107, 108 for supplying the coarse powder to the burner 15, the coarse powder mixed in a coarse powder mixer 5 located at a post-flow side of the connected part between the pipe line 109 and the pipe line 106. The pulverized powder supply system includes: a high-temperature carrier gas pipe line 105' for introducing a gas through the AH 18 to the burner 15; a low-temperature carrier gas pipe line 106', and others; and a pipe line 107' for supplying the pulverized powder to the burner 15 via a mill 24 that is connected to the pipe line 106' and pulverizes coarse powder. <P>COPYRIGHT: (C)2013,JPO&INPIT |
