SMOKE STACK Russian patent published in 1997 - IPC

FIELD: heat-power engineering; furnace devices equipment with flue gas discharge devices. SUBSTANCE: smoke stack consists of gas discharge shaft 2 with concentric outer pipe 3, nozzle 5 and flue gas purification system 9. Nozzle 5 is made in form of converging tube with outlet branch pipe 6 mounted at circular clearance around outer pipe forming mixing chamber 7. Outer pipe is provided with branch pipe 8 for connection with flue gas purification and circulation system 9 and is provided with bin 11 fitted with unloading branch pipe 12 in its bottom portion. Bin is located below branch pipe 8 which connects circular clearance of pipes with system 9. Nozzle 5 is provided with gas flow regulator made in form of damper 10 fitted in outlet branch pipe and/or in mixing chamber. EFFECT: selective purification of flue gases and enhanced efficiency of fuel burning. 3 cl, 1 dwg