| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress clogging in a spray nozzle by a tar component. <P>SOLUTION: Low-pressure ammoniacal liquor piping 16 includes: a cylindrical main pipe 16a where a low-pressure ammoniacal liquor flows; and a descending pipe line 16b which is formed in a sidewall part of the main pipe 16a and supplies the ammoniacal liquor in the main pipe 16a to a wet wall spray nozzle 12. In the configuration of the low-pressure ammoniacal liquor piping 16, as the descending pipe line 16b is formed in the sidewall part of the main pipe 16a, a tar component retained in an inner bottom of the low-pressure ammoniacal liquor piping 16 does not flow into the descending pipe line 16b. Thus, supply of the tar component from the low-pressure ammoniacal liquor piping 16 to the wet wall spray nozzle can be suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
