METHOD OF FUEL COMBUSTION IN CYCLONE PRIMARY FURNACE OF BOILER, AND PRIMARY FURNACE FOR ITS IMPLEMENTATION Russian patent published in 2010 - IPC F23C5/32 F23C1/00 

FIELD: heating.

SUBSTANCE: fuel is gasified, burnt and cooled during combustion; at that, afterburning and cooling processes are combined. Gasification process is divided into gasification process and combustion process. As primary air blasting, during gasification there used is one or several flows of combustion products of liquid and/or gaseous fuel, which are dispersed with formation of peripheral high-temperature strongly swirled air whereto pulverised solid fuel is supplied. As primary air blasting, during combustion there used is air forming near-axis strongly swirled flow enveloped with peripheral high-temperature strongly swirled flow of primary air blasting combustion products and gasification products, and interacting with it. To near-axis flow there added is liquid or gaseous fuel which is mixed with air of combustion process and products of gasification process; the obtained mixture is burnt, and combustion products are supplied to be further burnt and cooled. Cyclone primary chamber includes coaxially installed gasification chamber and afterburner chamber. Gasification chamber has gasification zone restricted with its inner surface and combustion zone located in near-axis part of gasification chamber. Gasification chamber includes cylindrical housing with tangential nozzles for supply of primary air, inlet edge and open outlet edge connected to afterburner chamber equipped with tangential air supply nozzles. On cylindrical surface of the housing there located is one or several pre-combustion chambers connected to air and liquid or gaseous fuel sources, and one or several atomisers for supply of pulverised solid fuel. Tangential nozzles of gasification chamber are at the same time the nozzles of pre-combustion chambers.

EFFECT: decreasing dimensions and weight of pre-combustion chamber, providing more complete fuel combustion, and enlarging its application field.

21 cl, 2 dwg