SU138201A1 - Reactive burner for thermal drilling of rocks - Google Patents

Description

Used drilling burners for thermal drilling of rocks, operating on liquid fuel with a gaseous oxidizer, have incomplete combustion of the fuel due to its insufficient dispersion in the burner.

In the described burner, in order to increase the degree of dispersion of liquid fuel and improve its mixing with the gaseous oxidizer, fuel evaporation chambers made in the form of dome-shaped cavities and sound chambers made in the form of annular cavities are used, with the passage of gaseous oxidizer through which the ultrasonic forms occur. fluctuations that provides fine dispersion and intensive mixing of fuel with an oxidizer. In the evaporation chambers, the liquid fuel evaporates, thereby improving the mixing of the fuel with the gaseous oxygen-oxidizing agent, which, as it passes through the channels inside the burner body, is heated and thereby increases the degree of mixing of the fuel and the oxidizer. An electric spark plug was also used in the burner for the initial ignition of the fuel mixture.

FIG. 1 shows a longitudinal drill burner in section; in fig. 2 is a section along the line A-A in FIG. one; in fig. 3-node B.

A drill burner for thermally drilling rocks with ultrasonic fuel spraying includes the following main components: chamber / combustion with cover 2, representing the bottom of the chamber, an annular chamber 3 connected to the sound chamber 4, an evaporation chamber 5 and an electric glow plug 6 built in 2 cameras at the bottom.

Gaseous oxygen is supplied under pressure into the annular oxygen chamber 7, from where it flows through the holes in the chamber / combustion bottom and in its walls into the annular chamber 5, from which

№ 138201

A narrow slit is S-to the sound chamber 4, causing ultrasonic whistle-like vibrations. The same chamber through channel 9 is supplied with fuel from the evaporation chamber, where it is brought to a gaseous state. In the sound chamber under the influence of ultrasonic vibrations and eddies formed by the oxygen entering the chamber, the fuel is dispersed and intensively moved with oxygen, enhanced by using the kinetic energy of oxygen molecules obtained by heating it. The fuel mixture then enters the combustion chamber by focusing in its center directly under the electrodes of the electric ignition plug 6. Oxygen, passing through the holes in the walls of the burner housing, heats up and simultaneously cools the burner, thereby enhancing the cooling effect of the water that washes the burner outside.

Liquid fuel (kerosene) enters the evaporation chamber 5 from the annular chamber 10 located above the oxygen chamber 7. Fuel is supplied to chamber 10 through a tube // with fitting 12. The cavity of the evaporation chamber is filled with asbestos mass to prevent the flame from entering the channels through which fuel. The sound chamber is provided with a device of the second annular cavity 4a, located under the upper chamber 4 and serving as an additional resonator to ensure the sustainability of ultrasonic vibrations when oxygen is supplied with variable pressure.

The industrial value of the described burner for thermal drilling of rocks lies in the fact that, due to the combined action of ultrasonic and evaporation dispersion, preheating of the gaseous oxidant and the use of electric ignition of the fuel mixture, the fuel burns more completely and the consumption of liquid fuel (kerosene) is reduced and gaseous oxidant (oxygen).

Subject invention

Claims (2)

1. Drill burner for thermal drilling of rocks with ultrasonic spraying of fuel, characterized in that, in order to better disperse liquid fuel and mix it with gaseous oxygen to complete the combustion of fuel, it uses evaporation chambers made in the form of dome-shaped cavities filled asbestos and providing in them the evaporation of liquid fuel, and sound chambers, made in the form of annular cavities, causing ultrasonic oscillations during the passage of gaseous oxygen through them, a fine dispersion Fuel displacement with oxygen. 2.Burov burner according to claim 1, characterized in that, in order to improve the mixing by using the kinetic energy of the heated gas molecules, as well as for the initial ignition of the fuel mixture, the walls of the combustion chamber are made with channels through which oxygen passes it is preheated, and in the combustion chamber itself there is an electric spark plug. FIG I Hole for L. a- - g OtnSepcinue dl - fuel supply in KOMepij Sxoda- tr.-. Yapilni sound fescue Sherstin for oxygen supply S kommevd 151 tubs fijf I Node 5