24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No. IN/PCT/2002/00350/DEL A (22) Date of filing of Application: 02/04/2002
(54) Title of the invention: “A SOLID FUEL BURNER AND METHOD THEREOF.”
(51) International Classification 7 : F23D
1/00, F23C 11/00
(30) Priority Data:
(31) Document No.: 2000-237235;
2001-20851; 2001-147964;
PCT/JP01/06684..
(32) Date: 3/08/2001, 4/08/2000,
29/01/2001, 17/05/2001
(33) Name of convention country:
PCT, JAPAN.
(66) Filed U/s 5(2): NIL
(61) Patent of addition to application
No.: NA
(62) Filed on: NA
(63) Divisional to Application No.:
NIL
(64) Filed on: NA
Total No Of Page: 88
(57) Abstract:
(71) Name of the applicant:
BABCOCK-HITACHI KABUSHIKI KAISHA
Address of the Applicant:
WORLD TRADE CENTER BUILDING 6 th FLOOR 4-1,
HAMAMATSUCHOU 2-CHOME, MINATOKU,
TOKYO, 105-6107 JAPAN
(72) Name of the Inventor:
TSUMURA, TOSHIKAZU
OKAZAKI, HIROFUMI
SHIMOGORI, MIKI
KIYAMA, KENJI
KURAMASHI, KOUJI
KIKUCHI, HITOSHI
TAKAHASHI, YOSHITAKA
MORITA, SHIGEKI
SAKAI, KAZUHITO
TANIGUCHI, MASAYUKI
KOBAYASHI, HIRONOBU.
According to a burner of the present invention, a stable combustion is obtained in a wide range from a
high-load operation condition to a low-load operation condition even in the case of low quality solid
fuel such as brown coal.
The amount of air supplied from additional air holes or additional air nozzles 12 can be adjusted
depending on the combustion load of furnace 41. At a low load, the amount of air supplied from
additional air holes or additional air nozzles 12 is increased, whereby the oxygen concentration in a
recirculation zones 19 formed downstream of the outside of a fuel nozzle 11 exit, permits a stable
combustion. At a high load, the amount of air supplied from additional air holes or additional air
nozzles 12 is reduced, whereby a flame is formed in a position far from the fuel nozzle 11. This
suppresses thermal radiation onto a solid fuel burner 42 structure and a furnace 41 wall. The solid fuel
burner 42 is applicable to combustion using low-quality solid fuel such as brown coal and exhaust gas
as the carrier gas.
18130