POWDERED FUEL COMBUSTION METHOD Russian patent published in 2015 - IPC F23D1/00 F23K1/00 

FIELD: power industry.

SUBSTANCE: air is separated using the method of nitrogen adsorption by zeolite, the first air flow enriched with oxygen and the second air flow enriched with nitrogen emitted from zeolite surface by its heating are formed, then the second air flow is separated into the main and additional flows, the additional flow is mixed with powdered fuel and the mix is supplied in the beginning of the ignition chamber. The part of mix of additional air flow and powdered fuel is supplied through the plasmatron to the ignition chamber where the flare of gasification of part of powdered fuel is formed in conditions of lack of oxygen, from the first air flow a part is separated and by means of the air tapping pipe supplied to the ignition chamber downstream the output cut of the plasmatron, downstream the plasmatron the flare of ignition of part of the powdered fuel formed in the plasmatron which ignites the mix of additional air flow and powdered fuel, the burning products from the ignition chamber are mixed with the main air flow and at lack of oxygen it is supplied into the combustion chamber, the rest of the first flow enriched with oxygen is supplied into the air preparation chamber where it is treated with the laser radiation of the solid-state laser with the wavelength 762±0.5 and/or 1268±0.5 nm, that induces the transition of oxygen molecules from the main electronic state into the excited singlet state $$O_2(b^1{\displaystyle {\sum }_g^{+})},$$ by supply of laser radiation into the cylindrical air treatment chamber with mirror surface, at least, in one place at the angle to its surface, smaller than the angle of full reflection from the mirror surface of the cylindrical air treatment chamber along the spiral polygonal curve with the step between the neighbouring turns of the spiral polygonal line, larger than the linear overall dimension measured along the axis of the cylindrical air treatment chamber, the treated part of the first air flow with singlet oxygen is supplied through the coaxial punched partition to the near-wall area of the combustion chamber, thus increasing the concentration of singlet oxygen towards the outlet from the combustion chamber.

EFFECT: decrease of toxic emissions and improvement of process of combustion of powdered fuel.

2 dwg