AIR-COOLED HEAD OF SWIRL ATOMISER Russian patent published in 2013 - IPC F23R3/28 F23R3/14 

FIELD: power industry.

SUBSTANCE: combustion chamber for combustion of fuel-and-air mixture includes swirl atomiser, precombustion chamber for receiving swirled mixture of fuel and air, flame tube and cooling unit. Precombustion chamber for receiving swirled mixture of fuel and air is interconnected as to fluid medium with swirl atomiser and represents a cylindrical element with central axis, which has the possibility of providing the swirled mixture of fuel and air with axial downstream direction along central axis, thus creating swirl flow of fuel mixed with air with the low pressure area on that axis. Flame tube is interconnected as to fluid medium with precombustion chamber and located downstream of the latter. Flow passage of flame tube is larger than flow passage of precombustion chamber, which allows the swirl extension in radial direction and creation of back flow, in which combustion products obtained during fuel and air combustion in flame tube have the possibility of being sucked along central axis when being directed upstream back to the precombustion chamber. Swirl atomiser has central through channel for receiving air and fuel flows, mixing those flows and providing that mixture with swirl movement. Cooling unit, the axis of which is collinear to central axis of precombustion chamber, is installed in central through channel of swirl atomiser. Cooling unit is interconnected as to fluid medium with the source of air that is colder than back flow and provided with possibility of directing colder air downstream to precombustion chamber, thus creating cooling flow.

EFFECT: increasing fuel combustion efficiency and reducing nitrogen oxide emission level.

20 cl, 13 dwg