| 摘要 |
A tangentially-fired furnace (2) defining a combustion chamber having a windbox (1) in each corner of the furnace. The secondary air is supplied to the furnace through a set of vertically tiltable nozzles (9,10,11,11,12) mounted in each windbox. A secondary air supply conduit (16) is mounted to each windbox to feed the tiltable nozzles therein. Each secondary air supply conduit has a section (15) adjacent to the nozzles having straightening vanes (19,20) forming channels (21,22,23) in which independently controlled louvers (25,26,27)regulate the total cross-sectional area of the channels to maintain the desired velocity of the secondary air through the nozzles. |
