Pulverized coal burner

Details Pulverized coal burner Pulverized coal burner

1998-07-15

2000-09-05

Lazarus, Ira S.

Furnaces

Including fluid fuel burner

Powdered solid fuel

110262, 110264, 431185, 431187, F23C 112, F23D 102

Patent

active

061126764

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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