SU497450A1 - Gas Burner - Google Patents

Description

one

The invention relates to devices for burning combustible gases with the receipt of a light of a torch and can be applied in metallurgical, glass melting and other units with a large hearth area.

A lime burner for receiving a light plume contains a central tube for the main gas, ending with an outlet shaped nozzle, with an axially movable insert for supplying an oxidant, as well as a mixer located at the exit of the burner.

This burner does not provide for intensive mixing of the annular plume with the main gas in the short section; therefore, with sharp fluctuations in flow rates, the possibility of annular plume disruption appears, the burners operation is accompanied by a significant noise effect.

In order to speed up the process of self-stabilization, eliminate the possibility of breaking the annular shielding plume and reducing the noise level, in the proposed burner the angles of inclination of the inner and outer cones of the pre-chamber to the burner axis are 30-60 ° and 7-10 °, respectively, and at the end of the pre-chamber between the surfaces cooled the cavities are fitted with a washer, made with two rows of longitudinal notches displaced relative to each other, communicating respectively with channels for supplying additional gas and oxidant, with the ratio of the length of the prechamber to the distance between the axes of the neighboring,

The cut-outs located in different rows are 4: 5.

Due to the increased angle of inclination of the inner wall of the prechamber, the annular flare opens preferentially in the direction of

central gas flow, accelerating the passage of self-stabilization reactions. At the ratio of the prechamber chamber to the distance between the axes of the adjacent cuts on the washer, equal to 4: 5, the jet of additional gas and

oxidizer form at the exit of the burner continuous ring torch. This will allow you to get a glowing torch, which has no low-temperature initial section.

Since the mixing of the additional gas jets with the oxidizer occurs outside the washer, greater stability of the annular plume is achieved and the noise effect is significantly reduced.

The cross section of the cutouts on the washer is molded to have a semicircular oval, rectangular, trapezoidal, triangular shape. FIG. 1 depicts the proposed burner; in fig. 2 - the same, bottom view.

The burner contains a central pipe 1 of the main gas, channels 2 and 3 for supplying additional gas n the oxidizer, cooled cavities 4 and 5, prechamber 6, washer 7 with cutouts.

The burner works as follows.

75-85% of the total gas is supplied through the central pipe 1. The rest of the gas to the tract and through the row of nozzles formed by the notches on the inner edge of the washer 7 n cooled by the cavity 4 enters the prechamber 6, where it partially mixes with the acidifier supplied through the second row of notches on the washer. The air required for the complete combustion of all gas is supplied along the outer surface of the burner. The ratio of oxidizer: gas in the prechamber is maintained within 1.6: 1.8. The combustion process starts inside the pre-chamber and at the exit from it forms a continuous ring high-temperature flare, which quickly heats the central gas flow, protecting it from premature mixing with the main air at the same time.

Subject invention

A gas burner containing a central tube for the main gas, concentrically arranged paths for supplying additional gas and an oxidizer enclosed in cooled cavities, expanding the prechamber, which in order to accelerate the self-carburing process, eliminate the possibility of disrupting the annular shielding flame and reducing noise level, it is equipped with a washer installed at the end of the pre-chamber between the surfaces of the cooled cavities and made with two rows of longitudinal displaced relative to each other cut-outs, respectively, communicating with the channels for supplying additional gas and oxidant, with the angles of inclination of the inner and outer cones of the pre-chamber to the burner axis, respectively, 30-60 ° and 7-10 °, and the ratio of the length to the distance between the axes of the neighboring A variety of cut-outs of 4: 5.

fPt / e 7

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