FURNACE Russian patent published in 2007 - IPC F23C5/08 

FIELD: heat power engineering.

SUBSTANCE: furnace comprises central and peripheral combustion chambers separated by the shield and interconnected through the by-pass port, burning device whose entrance part is set into the space of the peripheral combustion chamber provided with circulating pipe whose inlet face is located in front of the nozzles for supplying injecting agent and air and the outlet face is provided with the burning nozzle and dust source connected with the burning device and valve gates by means of the main and by-pass dust ducts, respectively. The circulating pipe is mounted inside the burning nozzle to define a ring space between them. The burning nozzle and circulation pipe are made of converging pipes. The by-pass dust duct is connected with the source of finely divided dust. The additional heating surfaces are made of deflectors provided with additional heaters and are mounted between the burning device and by-pass port inside the peripheral combustion chamber. Deflectors (18) and (19) are made of vertical plates to define a diverging pipe with converging entrance coaxial to burning device (5). Heaters (20) and (21) are made of additional burners arranged from both sides of burning device (5).

EFFECT: enhanced efficiency.

2 dwg