BOILER FURNACE Russian patent published in 2010 - IPC F23C5/08 

FIELD: power engineering.

SUBSTANCE: boiler furnace includes water walls comprising many-sided gas duct divided with division water walls into central and peripheral combustion chambers which are interconnected with upper and lower bypass openings; at that, division water walls are installed so that they are adjacent to adjacent water walls comprising angles of gas duct, on which there installed are burners and air nozzles directed inside peripheral and central combustion chambers respectively, and each peripheral combustion chamber is equipped with bottom made in the form of two slopes installed at an angle to each other and to horizon, connected with their upper edges to adjacent water walls, and with their side edges facing the central combustion chamber - to division water walls; at that, slopes are comprised with projections of adjacent water walls inside peripheral combustion chambers; at that, between top parts of projections separated by the angle of opening the flame of air nozzles installed under them there formed are the above described lower bypass openings lying in horizontal plane, and their axes in each peripheral combustion chamber are directed tangentially to internal conditional circle of central combustion chamber, to which there also tangentially directed are axes of the above air nozzles of central combustion chamber; at that, under the above air nozzles there installed are additional air nozzles of central combustion chamber, which are also directed tangentially to external conditional circle of central combustion chamber.

EFFECT: possibility of eliminating unburned carbon with failure and increasing efficiency of pulverised coal burnout in central combustion chamber.

4 dwg