CS211168B1 - Gas burner with increased flame stability - Google Patents

Abstract

Gas burner with high flame stability, particularly suitable for combustion of gases with a low burning rate. The purpose of the invention is to create a burner in which it is possible to burn different types of gases without replacing structural elements, in which high flame stability is achieved. This purpose is achieved by placing a stabilizing insert 3 separating the mixing space 2 from the combustion channel 7 in the tubular body 1 of the burner. The stabilizing insert 3 is provided with one central nozzle 4 and at least three shorter peripheral stabilizing nozzles 5. An annular stabilizing space 6 is formed in the stabilizing insert 3 on the side of the combustion channel 7. Independently of the size of the burner design, a highly stable flame is created even when burning gases with a low burning rate.

Description

BACKGROUND OF THE INVENTION The present invention relates to a gas burner having a high flame stability, in particular for the combustion of gases having a low combustion rate, which consists of a mixing space and a combustion channel separated from each other by a stabilizing insert having a central nozzle and circumferential stabilizing nozzles.

Gas burners are known with a stabilizer body whose position is not adjustable in the longitudinal direction, with a central nozzle and peripheral stabilization nozzles whose inlet apertures do not lie in the same plane. Further, gas burners are known in which the center nozzle length is the same stabilizing nozzles. A disadvantage of these embodiments is the low flame stability of the combustion gases with low combustion rate. Other disadvantages are the limited range of controllability of these burners, reduced safety of operation and, as a rule, the type of gaseous fuel cannot be changed without design modifications. The known designs of these burners are structurally complex, so they are very laborious to manufacture.

The above-mentioned disadvantages are overcome by the burner according to the invention, which consists in that the wall of the mixing chamber and the combustion channel is formed by a tubular body of the burner, in which the stabilizing insert with at least three circumferential stabilizing nozzles of length L and one central nozzle of at least 1 , 5.1 ·. The inlet openings of all these nozzles on the side of the mixing space are flush. An annular stabilizing space adjoins the stabilizing insert on the side of the combustion channel, the inner wall of which is formed by the wall of the protruding central nozzle and the outer wall forms a tubular body of the burner. Stabilization nozzles are connected to this stabilization space.

The advantage of such a burner is especially high flame stability and perfect combustion of the supplied gaseous fuel. As a result, the operation of the burner is highly safe and allows power regulation over a wide range. In addition, an immediate replacement of the type of gaseous fuel, for example natural gas instead of the propane-butane mixture, is possible without any design modifications.

When changing the output or type of gas, it is only necessary to set the correct amount of combustion air. The design of the burner according to the invention allows easy adjustment of the length of the combustion channel according to the desired flame character. The design of the burner is very simple and contains a minimum amount of easily manufactured parts. The burner components that are optionally exposed to radiant heat are effectively cooled by the supplied gas-combustion air mixture.

An embodiment of a gas burner according to the invention is shown in the accompanying drawing, which is a schematic longitudinal section through the burner. The burner consists of a tubular body X of the burner and a stabilizing insert 2 separating the mixing space 2 ° at the combustion channel χ. The stabilizing insert 2 is provided with a central nozzle 4 and circumferential stabilizing nozzles χ. Under the mouth of the stabilizing nozzles 2, the stabilizing insert 2 forms an annular stabilizing space 6.

The gas and combustion air supply to the burner mixing space 2 is not shown in the drawing.

The fuel gas and the combustion air enter the mixing space 2 in suitable proportions where they are mixed together. A larger part of the mixture passes into the combustion channel X through the central nozzle 4. A smaller part of the mixture passes through the peripheral stabilizing nozzles 2 whose diameter and length are chosen relative to the diameter and length of the central nozzle 4 so as to create highly effective stabilization breeds in the stabilization space. stabilize the combustion of the mixture supplied to the combustion channel X through the main nozzle 4 ·

The burner according to the invention can be used in particular for gases with a low combustion rate, such as natural gas or a propane-butane mixture and the like, especially in cases where a highly stable flame and a wide range of power regulation are required. The burner is suitable, for example, for heating various bodies before forming by welding or for preheating lining of foundry ladles.

Claims (1)

SUBJECT OF THE INVENTION Gas burner with increased flame stability, consisting of a mixing chamber and a combustion channel, spaced apart by a stabilizing component with a central nozzle and circumferential stabilizing nozzles, characterized in that the walls of the mixing chamber (2) and the combustion channel (7) are formed by a tubular a burner body (1) in which the stabilizing insert (3) is adjustable, having at least three circumferential stabilizing nozzles (5) of length L and one central nozzle (4) of at least 1.5. U, whose inlet openings on the side of the mixing space (2) are flush, with an annular stabilizing space (6) adjoining the stabilizing insert (3) on the combustion channel side (7), the inner wall of which is formed by the wall of the projecting center nozzle (4) ), the outer wall is formed by a tubular body (1) of the burner and into which the stabilizing nozzles (5) are connected *