EP 0225157 A3 19870930 - METHOD AND APPARATUS FOR REDUCED NOX EMISSIONS FROM COAL FURNACES

Title (en)

METHOD AND APPARATUS FOR REDUCED NOX EMISSIONS FROM COAL FURNACES

Publication

EP 0225157 A3 19870930 (EN)

Application

EP 86309192 A 19861125

Priority

AU 6573286 A 19861126
AU PH358085 A 19851126

Abstract (en)

[origin: EP0225157A2] The present invention discloses a method of, and apparatus for, reducing NOx emissions from black coal fired updraught furnaces (20). The pulverised coal is entrapped in the "primary air" and separated into two streams, one fuel rich (13) and one fuel lean (15). These streams are introduced into the furnace (20) via a corresponding burner(s) (14,16) with the burner(s) (16) for the fuel lean stream (15) being located at an elevation above the burner(s) (14) for the fuel rich stream (13). The apparatus comprises a concentrator (3) positioned between the substantially conventional mill (1) and furnace (20) and arranged to split the primary air and entrapped fuel into the two abovementioned streams. The concentrator preferably includes a classifier (8) and takes the form of a swirl generator (5) and radially positioned outlets which make use of the action of centrifugal force on the "primary air" and entrapped coal particles to bring about the desired separation.

IPC 1-7

F23K 3/02; F23C 6/02

IPC 8 full level

F23C 6/04 (2006.01); F23K 3/02 (2006.01)

CPC (source: EP)

F23C 6/047 (2013.01); F23K 3/02 (2013.01); F23C 2201/101 (2013.01); F23C 2201/301 (2013.01); F23K 2201/10 (2013.01)

Citation (search report)

[X] AU 495676 B2 19761209
[Y] DE 3124571 A1 19830601 - PODOLSKIJ MASINOSTROITELNYJ Z [SU], et al
[Y] US 4173189 A 19791106 - COOPER THOMAS H [US]
[X] DE 2933528 A1 19810326 - BABCOCK AG
[X] GB 965898 A 19640806 - BABCOCK & WILCOX LTD
[A] DE 3122476 A1 19821223 - MASLOV VIKTOR EFIMOVIC, et al
[A] FR 1591095 A 19700427
[A] US 4238210 A 19801209 - BULANG SIEGFRIED [DE], et al
[A] DE 3317244 A1 19840126 - ORGREB INST KRAFTWERKE [DD]
[X] REVUE GENERALE DE THERMIQUE, vol. 12, no. 144, December 1973, pages 1255-1262, Paris, FR; D.L. PAPADIAS: "L'utilisation des lignite et tourbe grecs pour la production de vapeur"
[A] PATENT ABSTRACTS OF JAPAN, vol. 7, no. 254 (M-255)[1399], 11th November 1983; & JP-A-58 138 906 (BABCOCK HITACHI K.K.) 18-08-1983

Designated contracting state (EPC)

AT BE CH DE ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0225157 A2 19870610; EP 0225157 A3 19870930

DOCDB simple family (application)

EP 86309192 A 19861125