The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2000
Filed:
Jul. 15, 1998
Hirofumi Okazaki, Hitachi, JP;
Hironobu Kobayashi, Hitachi, JP;
Toshikazu Tsumura, Kure, JP;
Kenji Kiyama, Kure, JP;
Tadashi Jimbo, Kure, JP;
Kouji Kuramashi, Kure, JP;
Shigeki Morita, Aki-ku, JP;
Shin-ichiro Nomura, Kure, JP;
Miki Shimogori, Kure, JP;
Hitachi, Ltd., Tokyo, JP;
Babcock Hitachi K.K., Tokyo, JP;
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.