SU591659A1 - Burner - Google Patents

Description

one

The invention relates to the field of gas combustion, in particular, to burners and can be used in boiler units, industrial furnaces and gas turbines.

A known gas burner containing an axial duct, separated by concentric partitions for supplying gas in several streams and an annular air duct placed outside the axial duct. The edges of the box form separate wedge-shaped channels in which the gas flow is divided into jets 1.

In the burner of this design, it is possible to adjust the torch parameters by varying the displacement rate, which is not always convenient.

A gas burner is also known, comprising a housing with an air inlet port and an annular gas duct forming the central air inlet channel 2. This burner is closest to the invention in its technical essence and the result achieved.

In a known burner, the luminosity and length of the flare can be changed only by redistributing the air supply between the channel and the nozzle. This increases the energy consumption for the drive of the fan that supplies air to the burner, since an increase in the flow rate of air in the duct or pipe leads to an increase in speed and, consequently, the flow resistance of the entire burner. In addition, the pressure of the blower fans is usually limited. As a result, the known burner has a small adjustment range.

The aim of the invention is to expand the range of adjustment of the torch parameters.

This goal is achieved by the fact that in a known burner comprising a housing with an air inlet duct and an annular gas duct forming the central air supply duct, the gas duct is divided by two cylindrical shells into three coaxial, annular ducts, each independently connected to a gas source, and on the cut of the box, the L-shaped peaks are reinforced, overlapping sections of the inner and on the outer annular channels and installed with a gap relative to the output ends of the shells.

In addition, at the exit of the middle annular gas channel can be installed corner dividers.

Claims (2)

FIG. 1 schematically depicts the proposed burner, a longitudinal section; FIG. 2 is a view A of FIG. one; in fig. 3 - scan the inner surface of the gas box with the installation of dividers. The burner includes a housing 1 with an air inlet pipe 2, an annular gas duct 3, forming a central channel 4 for supplying air. The gas duct 3 is divided by two cylindrical shells 5 into three coaxial annular channels 6-8. A corner stabilizer is installed in the middle annular channel 7) 9. From the cut of the gas duct 3, the L-shaped peaks 10 are reinforced, blocking the sections of the inner and outer channels 8 and 6 in light, respectively. The annular channels are autonomously connected to the gas source (not shown in the drawings) through a valve 11, which allows the gas flow to be redistributed between the channels. The burner works as follows. The air required for combustion is supplied through the nozzle 2 and the central channel 4. As a rule, not more than 25% of the total amount of air is supplied through channel 4. The gas is supplied through a gas duct 3. The annular gas flow at the outlet of the middle annular channel 7 of the duct 3 is crushed by stabilizers 9 into jets that go out between two air streams. With equal gas pressures in the outer, middle and inner annular channels 6-8 gas jets exit from the box 3 parallel to the axis of the burner. If a larger amount of gas is supplied to any of the channels (6 or 8), then the gas flow exiting the channel with greater pressure due to the L-shaped peaks 10 deviates from the axis and turns the gas jets leaving the middle channel 7 at an angle to the axis of the burner. When a larger amount of gas is supplied to the internal channel 8, the gas jets turn at an angle to the air flow passing through the air inlet pipe 2, are mixed with the air, and form a short non-glowing flame when burned. When more gas is supplied through the outer channel 6, the average gas flow is pressed to the burner axis. Since in this case the gas is outside the main air flow, it does not mix well with air, as a result of which a long luminous plume is formed. The control valve 11 can rotate the gas flow coming out of the middle channel 7 to a different angle and in different directions from the axis of the burner, thus obtaining a torch of different lengths and luminosities. Stabilizers 9 are installed in the burner in order to divide the gas flow into jets, since changing the angle of rotation of a separate jet is easier than the angle of rotation of the annular flow. By adjusting the angle of rotation and direction of the gas jets relative to the axis of the burner, you can get a torch of different lengths and luminosities, that is, you can adjust the parameters of the torch in a wide range. Claim 1. Burner comprising a housing with an air inlet pipe and an annular gas duct forming a central air inlet channel, characterized in that, in order to expand the range of adjustment of the torch parameters, the gas duct is divided by two cylindrical shells into three coaxial annular ducts, each of which is autonomously connected to a gas source, and on the cut of the box there are reinforced L-shaped peaks that block the sections of the inner and outer annular channels in the light and are installed with a clearance relatively the output ends of the shells. 2. Burner according to Claim. 1, characterized in that angular dividers are installed at the outlet of the middle annular gas channel. Sources of information taken into account in the examination: 1. German patent number 1007931, cl. 24 s 10, 1965. 2. Trobot T.P. Gas Burners, M., TsNIIPI, 1964, p. 19, FIG. 15. / / U x . BUT.  - -iO Ghz 1/1. f