Pulverized coal burner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 5, 2000
Grant Date -
N/A
app pub date -
Jul 15, 1998
filing date -
Jul 24, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pulverized coal burner includes a pulverized coal nozzle for jetting a mixture of pulverized coal and primary air, a secondary air nozzle and a tertiary air nozzle, concentrically arranged around the outer periphery of the pulverized coal nozzle, and a tube expanded portion at the end of a partition wall separating two adjacent air nozzles. A flow shift means such as a guide plate for shifting the secondary air in the secondary air nozzle so as to flow along the tube expanded portion is provided. The secondary air is jetted outwardly by the guide plate, and mixing of the secondary air and the tertiary air with pulverized coals is delayed, whereby an amount of NOx is decreased.
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