US2090740A - Burner - Google Patents

Description

Aug. 24, 1937. I. J. ZIMMERMAN BURNER Filed July 16, 1934 Patented Aug. 24, 1937 UNITED STA OFFICE 2 Claims.

This invention relates to improvements in burners, particularly burners employed in metallurgical operations.

In accordance with the invention, a burner is provided which insures thorough atomization of the fuel and a complete mixing of the fuel and air with the result that combustion is efiiciently effected and improved operating results are secured. In addition, the invention provides for closer contact of fuel and air particles than is true of many prior art devices, which contributes to the efficiency of the burner and accurate control of the composition of the combustible mixture.

Various other features and advantages of the invention will be apparent from the following particular description and from an inspection of the accompanying drawing.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawing forming a part thereof, in which Fig. 1 is a longitudinal section of a burner embodying the principles of the invention,

Fig. 2 is an end View of the nozzle end of the burner of Fig. 1,

Fig. 3 is a cross-section taken along line 3-3 of Fig. 1,

Fig. 4 is a cross-section taken along the line 4-4 of Fig. 1, and

Fig. 5 is a cross-section taken along the line 5-5 of Fig. 1.

Like reference characters denote like parts in the several figures of the drawing.

In the following description and in the claims, various details will be identified by specific names for convenience, but they are intended to be as generic in their application as the art will permit.

Referring to the drawing, l is a pipe having inlet 2 and valve 3, said pipe being connected to and terminating in fuel chamber 4. Surrounding pipe i is pipe 5 having inlet 6 and connected to and terminating in mixing chamber 1. Holes 3 are provided in the wall of fuel chamber l on the side of blades 9 farthest from the burner nozzle i0. Spiders Ila. and Ilb are provided between the walls of chambers 4 and I and collars i2 are positioned on the walls of chamber 4 on the nozzle 55 side of blades 9, which blades are rotatably mounted on the wall of chamber 4. Surrounding pipe 5 and the wall of chamber 1 is pipe [3a defining chamber l3 having inlet I4. A spider I5 is provided between pipe I31 and the wall of chamber 1 and nozzle 10 equipped with fins I6 is afiixed to pipe 13 by set screws H.

In operation fuel, for example, oil, is introduced into pipe I through inlet 2, the rate of flow being controlled by suitable manipulation of valve 3. The fuel is forced out of fuel chamber 4 through holes 8 into mixing chamber 1 where it is met by high pressure air, say, one to three pounds, introduced through inlet 6 which forces the oil against blades 9 with the result that the oil is atomized and thoroughly mixed with air. The mixture is discharged through spider llb into the nozzle 10 where it is met with low pressure air, say, one-half to one pound, from chamber l3 introduced through inlet l4, said mixture and said low pressure air being thoroughly intermixed by means of fins l6, prior to discharge from the nozzle.

It is readily apparent that the nature of the flame and composition of the combustion gases produced by the novel burner of the invention can be accurately controlled as the valve regulating the supply of fuel is removed from the vicinity of the burner, thus eliminating changes in the size of the valve orifice due to heat.

The only moving parts of the burner are the blades which atomize and mix the fuel and air and they are constantly lubricated with fresh oil and cooled with air. The coalescence of oil particles within the mixture to form droplets is practically prevented by reason of the large nozzle which facilitates expansion of the gaseous mixture as it enters the furnace. In addition the burner is adjustable Within limits as will be seen from an inspection of the drawing.

While certain novel features of the invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art Without departing from the spirit of the invention.

What is claimed is:

1. A burner comprising a fuel supply pipe terminating in a chamber, the end of said chamber opposite the entrance of the fuel supply pipe being closed, blades rotatably mounted upon the wall of said chamber, said wall having holes therein on the sides of said blade farthest removed from the closed end of said chamber, a pipe surrounding said chamber and blades and forming a mixing chamber, said mixing chamtioned pipe being connected with a source of high pressure air, a housing surrounding said mixing chamber and connected With a source of 10w pressure air and a nozzle affixed to said housing and surrounding the mixing chamber at its outlet.

2. In an oil burner, a first chamber connected to a source of oil, a second chamber surrounding said first chamber and connected to a source 10 of high pressure air, a third chamber surrounding her having a fuel mixture outlet, said last mensaid second chamber and connected to a source of low pressure air, blades rotatably mounted upon the wall of said first chamber, the wall of said first chamber having holes therein immediately preceding said blades and a nozzle afiixed to said third chamber and operatively associated with said second chamber, said nozzle having fins afiixed to its inner perimeter.

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