SU1206558A1 - Burner - Google Patents

Description

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The invention relates to the field of energy, and specifically to devices in which gaseous fuel is mixed with air in front of the no-i dacha into the combustion space, and can be used in hot water boilers and steam boilers and industrial furnaces.

The aim of the invention is to reduce the concentration of nitrogen oxides in the combustion products.

FIG. 1 shows the burner, longitudinal section; in fig. 2 is a section A-A in FIG. one.

The burner device comprises a housing 2 connected to the air duct 1, along the axis of which a pipe 3 is installed with an open inlet face and a peripheral swirler 4. In the side walls of the housing 2 a fuel supply unit 5 is placed.

The inlet end of the housing 2 is connected to the curved section 6 of the duct 1, which in its inlet section is connected to the straight section 7 of the duct. The pipe 3 is placed inside the duct 1 and coaxially with him, while the input end of the pipe 3 is placed to the curved portion of the duct 1, and the output end - after him. It is most advisable to place the inlet end of pipe 3 at a distance greater than 2.5 diameters of duct 1 from the beginning of its curved section and at a distance not less than six diameters of duct 1 from the nearest bend on its pre-included sections.

During the operation of the burner, the blast air in front of the curved Section 6 of the air duct 1 in the cavity of the inlet end of the pipe 3 is divided into two streams — primary and secondary.

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1206558. 2 Primary air is supplied through an annular channel formed by the inner wall of the duct 1 and the outer wall of the pipe 3 to the periphery 5 swirl 4, which blows an axially symmetric twist to the blowing air, and the air is further mixed with the gaseous fuel. jets are fed into the primary air from the fuel delivery unit 5.

At the outlet, the centrifugal forces reject the air-fuel mixture from the axis of the burner, where the first stage of fuel burnup in a cone-shaped rattling flare occurs.

Secondary air is fed through pipe 3 in a compact stream along the axis of the burner device, which coincides with the axis of the cone-shaped torch. Since the energy that throws the cone-shaped flare away from the axis decreases rapidly due to the growth of the drop mass (the growth of the flare area and, accordingly, its volume due to suction of flue gases), and the energy of the compact axial jet of secondary air remains on a longer section, suction of gases from the cone-shaped torch into the axial jet at some distance from the burner's embrasure, and the burning of products of inadequate and unburned fuel in the continuous torch along the axis of the burner, i.e. The second stage of fuel combustion is realized. Placing the inlet end of the pipe 3 in front of the curved section 6 of the air inlet allows the optimal ratio of primary and secondary air to be maintained when the total air flow rate changes.

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VNYUSHI Order 8687/39 Circulation - Subsidiary Filial PPP Patent, g.Uzhgorod, ul.Proektna, 4

Claims (1)

BURNER DEVICE containing a housing connected to the duct, along the axis of which a pipe with an open inlet end and a peripheral swirl is installed, and a fuel distribution unit is placed in the side walls of the housing, characterized in that, t in order to reduce the concentration of nitrogen oxides in the combustion products, the duct has a curved section, while the input end of the pipe is placed before the curved section, and the output after it.