SU954712A1 - Burner guiding apparatus - Google Patents

Description

(54) BURNER GUIDE

one,

This invention relates to air supply devices in burners and can be used in burners.

A burner guide apparatus is known, comprising an air supply duct, a fuel injection unit disposed therein and a twisting chamber formed by segment vane valves, each schiter made of several synchronously interlocked moving segments 1.

The disadvantage of this device (Ugva - inefficient mixing of fuel with an oxidizing agent, which reduces the completeness of the combustion of fuel.

Closest to the present invention is a burner guide apparatus, comprising a housing with curved guide plates forming a swirling chamber communicated with a coaxially mounted pipe for transporting the gaseous agent 2 to the combustion zone.

In the known device, insufficient air flow turbulization occurs, which reduces the degree of fuel burnout.

The purpose of the invention is to intensify the combustion process by imposing a large-scale turbulence field on a swirling air flow.

The goal is achieved by the fact that the plates are provided with perpendicular ribs installed along them. I will turn on the generator.

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

The burner guide unit contains a housing 1 with curved guide plates 2, which are fixed, and movable plates 3. Plates 2 can be mounted movably. All plates 2 and 3 form a curling chamber 4 communicating with a coaxially mounted pipe 5 for transporting a gaseous agent to the combustion zone. Plates 2 and 3 are provided with perpendicular ribs 6 installed along the curved generator plates 2 and 3. Air can be supplied through the central tube 7.

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During operation of the device, fuel is supplied through pipe 5 to the combustion zone. The air enters the housing 1 into the swirl chamber 4 through a system of tangential channels formed by the curved plates 2 and 3. The degree of twist depends on the position of the rotary plates 3. In general, the elementary air jets must develop in parallel, but the centrifugal forces affect the air flow it to the plates 2 and 3, on which the boundary layer is formed. This layer as well as the radial velocities determine the degree of turbulence of the overall air flow. Placed on the curved forming plates 2 and 3, the perpendicular fins 6 deflect separate portions of the air flow. On the opposite side of the fins 6, a vacuum zone occurs, and intense eddies form on their edges. The combination of these phenomena leads to the emergence of turbulent pulsations, the scale of which depends on the height and angular length of the ribs 6 and their relative position. Calculations show that the effect of turbulence in the air flow intensifies the combustion process at the height of the fins 6 equal to 0.05-0.2 of the radius of the swirl chamber. The number of foci of pulsation nucleation is determined by the length of the ribs b, which is 5-15 °. The proposed guide device with such a turbulizing device is practically non-existent.

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Claims (2)

additional hydraulic losses for turbulization, since the deviation of part of the flow to the center by the ribs will improve the channel filling with flow, i.e., equalize the velocities along the swirl chamber radius, which compensates the energy costs for air flow turbulence and, as a result, intensifies the process of fuel combustion. Claims An burner guide apparatus comprising a housing with curved guide plates forming a swirl chamber communicated with a coaxially mounted pipe for transporting a gaseous agent to the combustion zone, characterized in that, in order to intensify the burning process, the plates are provided with perpendicular fins installed along their curved generatrix. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2946452, cl. F 23 C 7/00, 1980. 2. USSR author's certificate for application number 2934372, cl. F 23 D 13/24, 1980. S ig.7.