SOLID-FUEL FEEDER Russian patent published in 2017 - IPC F23K3/08 F23B40/00 

FIELD: power industry.

SUBSTANCE: solid-fuel feeder contains a hopper placed above the furnace, the outlet of which is communicated through the fuel supply chamber to the grate surface, equipped with a crank-and-rod mechanism of its reciprocating motion, and a drive of this mechanism. In the cavity of the fuel supply chamber, the fuel dispenser is placed, the upper and lower gate valves are rotatable about horizontal axes parallel to the front wall of the furnace and the baffle plate with an inclination of not less than the sliding angle of the coal along the steel. The dispenser comprises a cylindrical fuel drum provided with equidistant triangular protrusions oriented along generatrixes, rotatably mounted about the horizontal axis parallel to the front wall of the furnace, is provided with a rotation drive and is made of a length equal to the width of the fuel supply chamber. The upper gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, and the lower part is supported on the portion of the fuel drum facing it. The lower gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, below the rotation axis of the fuel drum, and the lower one is supported against the surface of the grate plate surface facing it. The feeder is provided with a work unit for coordinating the operation of the reciprocating motion of the grate plate and the drive of the fuel drum. In addition, a receiving chamber is formed between the hopper and the fuel supply chamber in the form of a hollow body contiguous therewith, in the cavity of which there is an inclined unloading plate with an inclination of not less than the sliding angle of the coal along the steel, the upper edge of which is rigidly fixed to the rear wall of the receiving chamber, is placed with a clearance to the front wall of the receiving chamber. Improved depth regulation of fuel delivery and accuracy of its dosing is provided for operation at low loads.

EFFECT: invention makes it possible to increase the depth of fuel supply regulation and the accuracy of its dosing, when operating at low loads.

2 cl, 2 dwg