SU244541A1 - GAS-MAZUT BURNER - Google Patents

Description

The invention relates to the field of burners for burning liquid and gaseous fuels with regulation of the length and luminosity of the gas plume and can be applied in power boilers, as well as in industrial boilers and furnaces.

Gas torches with adjustable length and luminosity of a torch are known, containing an air inlet box, a gas supply pipe coaxially installed in the box with several rows of radial gas outlet openings and a cylindrical valve with sector slits along the axis of the burner to ensure the passage of gas through one row of holes.

To ensure smooth adjustment of the length and luminosity of the torch in a wide range coaxially with the gas supply pipe, a telescopic tube with two cylindrical spool elements with radial holes fixed to it is installed to control the gas flow in conjunction with the holes and the output edge of the gas supply tube and exit A cone-shaped divider is installed from the gas supply pipe, forming an adjustable annular gap with the slide for exit of the gas stream directed at an angle of 60 ° to the axis of the burner.

The holes in the gas supply pipe and in the spool are slotted with the ratio of the total area of the holes in the spool element remote from the burner mouth to the total area of the holes in the spool element at the burner mouth, depending on the characteristics of the combusted gas, for example for natural gas, equal to 2: 5.

This ensures job safety.

The total area of the gas outlet annular gap and the holes in the spool elements is constant for all its positions.

FIG. 1 shows the proposed burner; in fig. 2 - position of the spool with the minimum length and luminosity of the torch; in fig. 3 - the position of the spool at the maximum length and luminosity of the torch.

The burner contains a duct / for supplying air with an axial blade swirler 2 installed in it, coaxially positioned in the duct / gas supply pipe 5 with a circular slot 4 for gas outlet located inside the tube 3

telescopic tube 5 with two cylindrical elements of spool 6 fixed on it, each of which has a row of radial slit openings 7 and S. There is a central axis along the burner axis

At the end of the pipe 9, a cone-shaped divider 10 is fixed, forming with the spool 6 an annular adjustable socket 11 for the outlet of a gas jet directed at an angle of 60 ° to the axis of the burner. The movement of the spool 6 is carried out by means of a pipe 5, which slides along the surface of the central pipe 9 and (located in threaded engagement with the flywheel 12.

The burner works as follows.

The gas enters the gas supply pipe 3 and may, depending on the location of the spool 6, partially exit through the radial slit holes 7 and 8 and partly through the annular gap //. The air required for the combustion of fuel enters through the housing 1.

The length and luminosity of the torch are adjusted as follows.

When the spool 6 is positioned furthest from the splitter 10 (see Fig. 3), only the annular gap 11, from which the gas flows out at an angle of 60 ° to the axis of the burner, is displaced with air and burns in the furnace space. The burner works as a diffusion and gives a torch with a maximum length and luminosity.

When the spool 6 is in position, when its opposite edge is adjacent to the divider 10 (see Fig. 2), only the radial slit holes 7 and S will be opened to exit the gas. In this part of the total gas flow will go out through the holes 7, for preliminary mixing with the air, and the rest through the holes 8 - perpendicular to the relief flow. The burner gives a torch of the minimum length and luminosity. The intermediate characteristics of the plume are obtained by appropriately adjusting the position of the spool 6, i.e. the distribution of the gas output between the annular gap Pi and the radial holes 7 and 8. The total area for the passage of gas through the annular gap // and through the radial holes 7 and 8 remains constant regardless of the position of the spool 6, i.e. the gas velocity remains constant.

The total area of the radial slotted holes 7 and 8 is equal to the maximum area

the cross section of the annular gap 11, i.e. P-, -

p FW, and the ratio is selected from the safety conditions of pre-mixing the gas with air and it is constant for any position of the spool 6.

The total area of the flow sections of the gas-annular gap 11 and the holes 7 and 8 in the elements of the spool 6 is constant for All modes of operation of the burner.

Subject invention

Claims (3)

1. A gas-oil burner containing an air supply box, a gas supply pipe coaxially installed in the box with radial openings for gas outlet and a valve located along the axis of the burner mounted inside the tube, characterized in that, in order to ensure smooth adjustment of the length and luminosity of the gas torch in a wide range, coaxially with a telescopic tube with two cylindrical spool elements with radial holes fixed to it is installed by a gas supplying tube to control the flow of gas in the interaction with openings and an output edge of the gas supplying pipe, and a cone-shaped divider is installed at the outlet of the gas supplying pipe, forming an adjustable annular gap for the gas outlet with the slide. 2. Burner according to claim 1, characterized in that, in order to ensure safe operation, the holes in the gas supply pipe and in the spool are slotted with the ratio of the total area of the holes in the element the spool remote from the burner mouth to the total area of the holes in the spool element at the burner mouth, determined depending on the characteristics of the gas supplied, for example for natural gas, equal to 2; five. 3. Burner on PP. 1 and 2, characterized in that the total area of the gas-annular gap and the openings in the spool elements is constant for all the spool shafts. FIG. one