UNIVERSAL CONTROLLED HEAT-PROTECTED GAS BURNER Russian patent published in 2011 - IPC F23D14/00 

FIELD: power industry.

SUBSTANCE: burner includes cylindrical housing with gate, annular gas header coaxial to the above housing and having two turnaround devices which are conjugated along cylindrical surface, coaxial to header and have rows of groups of different-calibre replaceable nozzles, which are uniformly located and identical to each other; channels of nozzles are directed at acute angle to burner axis; gas supply pipelines, air pipeline formed with central hole of gas header, and controlled swirler arranged in it; at that, radial rotating blades of swirler are fixed on swirler axis installed on thread in central bush of the gate, and rod-shaped drive tang of blades, which is parallel to their rotation axis, adjacent to annular groove of central bush, and direction of turn of blades is opposite to the direction of thread of central bush; besides, burner includes turning bush with drive tang, flap and fixture, which is attached to inner case and put with possibility of being moved along the axis to central hole of header, hold-down bush put into turning bush with fixture against being cranked relative to header and pressing through inter-bush split shearing ring by means of a nut with drive tang, flap and fixture both cases to conical edge of header wit two rows of holes made in it in numbers appropriate to the number of groups of nozzles in a row; at that, one row of holes is offset in circumferential direction relative to the other one; external case is provided with drive tang with flap and fixture; besides, burner body consists of conical insert and cylindrical head piece, which are tightened with flange connection with heat barrier, edge gate is installed with radial turning shutters at the inlet; protective screen is installed in flange connection with a gap S₀ between it and generatrix of conical insert complete with mask chromium-plated on the side of flame and covering heat insulating layer on the screen, and baffle-plate; at that, in the set there are holes located along axes corresponding to axes of nozzles, and surface area of gap S₀ corresponds to the sum of surface areas S₁ of gaps between header and head piece and S₂ between screen and cases.

EFFECT: higher operating efficiency of burner, quality and completeness of fuel combustion, and lower CO and NO content in combustion products.

2 cl, 7 dwg