SU566069A2 - Burner for a directly fired furnace - Google Patents

Description

one

The invention relates to burner technology and can be used for heating fiery furnaces, such as open-hearth furnaces.

According to the main auth. No. 343 112 known burners of a fiery furnace, contained in the cooled housing konititrichno located pipes, forming paths

for fuel and oxidizing gas, ending with one located under the other nozzles, the geometrical axes of which are located in the same vertical plane parallel to one another, directed at an angle of 15-30 to the horizontal and intersect their paths at an angle of BO-75

However, this burner is characterized by low efficiency, expressed in poor heating of the charge, which is under the lower part of the body,

The aim of the invention is to increase the efficiency of the burner.

To do this, symmetrical slits are made in the lower part of the pipes. The cuts are connected by channels IiepeN eiiHoro.

slit in the bottom of the case.

This makes it possible to provide two torches directed at different angles to the horizon, which expands the area of their interaction with the charge and improves its heating; throughout the area.

FIG. 1 shows schematically the proposed burner, a longitudinal section; in fig. 2 - the same; cross section.

The burner comprises a housing 1 and a head 2. In the housing 1 there are tubes 3-7 each other. In the head 2 there are a fuel nozzle 8 and an oxygen nozzle 9. In the nozzle B there is a nozzle 10 for the supply of fuel oil and a nozzle 11 for feeding the fuel oil emulsion.

All nozzles are placed at the same angle to the horizontal (15-30), and their geometrical axes are in the same vertical plane.

In the lower part of the pipe 4, there are DVR symmetrical slit-like pryuzi 12 which are connected by channels 13 to slot 14. Similarly, two symmetric

Nyv slot 15 slit profile. The slots 15 by channels 16 are connected to the ports 17 in the lower part of the housing. Slots 14. and 17 also have. 1Target | cross section. The canals 1 13 and 16 are of variable rectangular section.

Fuel oil is supplied through pipe 7, a nebulizer (for example, air) through the path between pipes 6 and 7, natural gas through the path between pipes 6 and 5, and oxygen through the path between pipes 5 and 4. The outflow oil at the exit from the nozzle 11 is dispersed with air in the nozzle 1O and mixed with the natural gas in the nozzle. In the lower parts of the paths for natural gas and the oxidizer, the corresponding currents are divided into two parts. A part of natural gas along with fuel oil and oxidizer through nozzles 8 and 9 leaves the burner into the furnace working space, where, mixing and burning, it forms a torch directed at an angle of 2 ° to the horizon.

Another part of the oxidizer and natural gas is supplied respectively through slots 12 and 15, channels 13 and 16 of slots 14 and 17 in the lower part of housing 1 to the furnace. At the exit from slots 14 and 17, natural gas and oxidizer are mixed and burned in two jets.

The burner is cooled by supplying water between pipes 3 and 4, which is discharged along the path between pipe 3 and housing 1.

The burner is installed in the roof, for example, by the open-hearth furnace in front of the end slopes. During the operation of the burner, two torches are created — one, directed at an angle of 20 to the horizon along the opal axis of the working space, overtaking, a single torch and the other, pointing down a hard torch in the form of slit-like jets. The torch transfers the charge 7O-80% heat, the rest

This heat (20–30%) is introduced by a rigid torch directed perpendicularly to the horizon.

The location in the lower part of the burner casing slots connected

with tracts of fuel and oxidizer and provide-. The addition of the latter to the furnace improves the heat distribution in the charge and speeds up the heating of the bath, which allows an increase in the productivity of the furnace.

Claims (1)

Formula of inventions Burner fiery furnace auth. .ev No. 343112, distinguished from 9. so that, in order to increase its efficiency, in the lower part of the tubes forming the paths for the fuel and the oxidizing gas, symmetrical lines are located; they are connected by channels of variable rectangular I section with slots in the lower part of the body. / J /.7 14Fig .1 Fig 2