Pulverized coal burner
US6112676A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 15, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Jul 15, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2900/09002
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.