BURNER WITH CENTRAL AIR JET AND METHOD TO REDUCE NO EMISSION OF SPECIFIED BURNER (VERSIONS) Russian patent published in 2011 - IPC F23D1/00 

FIELD: power engineering.

SUBSTANCE: burner with a central air jet comprises the following components: an axial pipe that includes an axial area, besides, the axial pipe is plugged at one end and opened at the other end, a circular pipe that concentrically surrounds the axial pipe, and forms the first circular zone between them, a drum that concentrically surrounding the circular pipe, and forming the second circular zone between them, a wall of the burner zone that concentrically surrounds the drum and forms the third circular zone between them, a supply pipeline arranged radially between the axial pipe and the circular pipe, besides, the supply pipeline forms a channel for movement of fluids between the axial zone and an air box, the facilities for conditioning of a pulverised coal flow around a part of the supply pipeline enclosed into the first circular zone, and also a damper that controls the flow and is arranged in the supply pipeline. The axial zone comprises a flow-conditioning device. The first circular zone comprises a flow-conditioning device. The first circular zone comprises a deflector arranged along the flow in front of the plugged end of the axial pipe. The burner comprises facilities to supply pulverised coal into the first circular zone. The second circular zone and the third circular zone are connected via a channel of fluids movement with an air box. The burner comprises a blade in the second circular zone, a blade in the third circular zone and a device of air flow measurement and a damper in the second and third circular zones. The diameter of the axial zone makes mainly from 228 to 508 mm, and the diameter of the first circular zone is mainly from 381 to 762 mm. The diameter of the second circular zone makes mainly from 508 mm to 1016 mm. The diameter of the third circular zone makes mainly from 560 mm to 1270 mm.

EFFECT: invention makes it possible to reduce generation of NO_x.

26 cl, 4 dwg