SPRAY UNIT OF ROTARY BURNER FOR LIQUID FUEL Russian patent published in 2012 - IPC F23D11/06 

FIELD: power engineering.

SUBSTANCE: spray unit comprises a spray sleeve fixed at the end installed as capable of rotating a driven hollow shaft, the end of which, protruding into a cavity of the spray sleeve, is made as capable of fixation of a spray nut on it, coaxially with a longitudinal axis of the spray sleeve. The driven hollow shaft is made as capable of rotation with frequency of 7500-8000 rpm. The spray sleeve is installed in the cavity of a controlled outlet nozzle (arranged in the form of a cone), arranged as capable of reciprocal displacement along a hub of a fan impeller and fixed with the spray nut, by means of a threaded joint with the possibility to replace the spray sleeve of one length and/or taper with a spray sleeve of another length and/or taper, besides, the controlling outlet nozzle coaxially covers the spray sleeve, and its rear side faces the boiler furnace. The surface of the fan impeller facing the spray sleeve is equipped with a cylindrical ledge coaxial with the axis of rotation of the hollow shaft, at the same time the bottom of the spray sleeve is equipped with a ledge, with a cylindrical bore in the end, arranged with the capability of tight fit on the cylindrical ledge of the fan impeller. In the spray nut wall there are spray holes arranged preferably as equidistant from each other. The rear side of the spray nut is equipped with a circular groove, the outer edge of which is made as capable of tight adjacency to the surface of the spray sleeve bottom. In the bottom of the spray sleeve there is a through hole capable of connecting the circular groove cavity and cavity of the fan 6 impeller jacket. In the volume of the spray nut, in gaps between spray holes, there are through air directing openings arranged as preferably equidistant from each other, and their longitudinal axes are aligned along the axis of symmetry of the spray nut, which matches the longitudinal axis of the driven hollow shaft, preferably at the angle to the surface of the spray sleeve.

EFFECT: invention provides for high-quality spraying of highly viscous heavy fuel with extended duration of burner operation intervals between treatments of the spray sleeve.

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