EA043860B1 - BURNER WITH COUNTER-SWIRING JETS - Google Patents

Description

The invention relates to gas burners and can be used in the combustion chambers of gas turbine engines, in the furnaces of boilers and furnaces and other heating units.

A burner is known that contains a gas supply pipe with a tee, a threaded plug, a gate with a lock nut, a removable nozzle, a pre-treatment channel consisting of a confuser, a mixing chamber and a diffuser with fingers. The gas supply pipe is connected to a threaded pipe, placed coaxially with the confuser and secured with gussets (RoK patent No. 24780, IPC F23D 14/64, published 10/17/2011, Bulletin No. 10).

The disadvantages of the burner are low fuel mixing efficiency, high concentrations of nitrogen oxides, and low stabilization performance.

A frontal device is known that contains coaxially located blade swirlers with opposite flow swirl angles and at least one collector placed between them with holes filled in its rear wall (USSR patent 1468138, F24R 3/16, publ. 09.23.90, bulletin No. 35 ).

The disadvantages of the burner are low fuel mixing efficiency, high concentrations of nitrogen oxides, and low stabilization performance.

The closest in technical essence is a front device containing outer and inner annular coaxially mounted blade air swirlers, the blades of each installed tangentially to the generatrix of the cylindrical surface passing through the root section of the blades, and a ring flame stabilizer placed between the swirlers, with the blades of the outer swirler facing the back axis of the combustion chamber, internal - with a trough (USSR patent No. 1688051 A1, IPC F23R 3/14, October 30, 1989, Bulletin No. 40).

The disadvantages of the burner are low fuel mixing efficiency, high concentrations of nitrogen oxides, and low stabilization performance.

The objective of the invention is to create an effective, cost-effective and industrially applicable burner for use in the combustion chambers of gas turbine engines, in the furnaces of boilers and furnaces and other heating units.

The technical result is a reduction in harmful emissions, an increase in the completeness of combustion, and an increase in flame stabilization.

To achieve the technical result, a burner containing installed blade air swirlers, where the blades of each swirler are installed tangentially to the generatrix passing through the axis of the burner, and the blades of the upper swirler face the back of the burner axis, the lower one faces the trough; according to the invention, the burner has a flame stabilizer with nozzle holes, located along the flame stabilizer, as well as vortex guides having swirlers located at the end sides of the flame stabilizer, consisting of holes and blades for creating vortices inside the swirler.

The invention is illustrated by drawings

In fig. 1 shows a cross section of the burner; Fig. 2 - view of the upper row of blades, Fig. 3 - view of the lower row of shoulder blades, where

- upper blade swirler;

- lower blade swirler;

- flame stabilizer;

- nozzle holes;

- vortex guides;

- blades of vortex guides;

- holes of vortex guides.

A burner with counter-twisting jets includes the following components and zones: an upper blade swirler 1 and a lower blade swirler 2, located above and below the flame stabilizer 3, on which the nozzle holes 4 are located, swirl guides 5, consisting of swirl guide blades 6 and swirl holes guides 7.

The burner with counter-twisting jets in the proposed invention operates as follows: combustion air enters the burner and passes through the upper and lower blade swirlers 1, 2, swirling, creating a recirculation zone in the front part. The fuel enters through the nozzle holes 4 installed in the flame stabilizer 3, for additional stabilization of the flame, part of the fuel passes through the vortex guides 5, passing through the blades of the vortex guides 6, the fuel enters the holes 7, creating fire vortices in the combustion zone that support the flame in the combustion zone.

Thanks to the presence of nozzle holes and an upper and lower swirler, fuel and air are mixed efficiently, creating a flame with a lean concentration of fuel in the combustion zone, which allows achieving a reduction in harmful emissions.

Similarly, due to the effective mixing of fuel with air in swirling flows formed at the front of the burner device, as well as more efficient fuel atomization due to

- 1 043860 the presence of nozzle holes in the flame stabilizer makes it possible to achieve high combustion completeness.

The presence of vortex guides installed in the end sides of the stabilizer allows you to create additional flame vortices located in the end parts of the main vortex flame, which allows you to significantly change the concentrations of fuel and air, which ensures high stabilization of the flame.

Claims (1)

CLAIM A burner containing installed blade air swirlers, where the blades of each swirler are installed tangentially to the generatrix passing through the burner axis, with the blades of the upper swirler facing the back of the burner axis, the lower one facing the trough, characterized in that the burner has a flame stabilizer with nozzle holes located along flame stabilizer, as well as vortex guides having swirlers located at the end sides of the flame stabilizer, consisting of holes and blades for creating vortices inside the swirler.