EP3480520B1

EP3480520B1 - Furnace burner

Info

Publication number: EP3480520B1
Application number: EP18193973.7A
Authority: EP
Inventors: Dennis Boyle; Michael Mattich
Original assignee: Berry Metal Co
Current assignee: Berry Metal Co
Priority date: 2017-11-03
Filing date: 2018-09-12
Publication date: 2020-08-05
Anticipated expiration: 2038-09-12
Also published as: EP3480520A1

Description

FIELD OF THE DISCLOSURE

The present disclosure generally relates to an improved burner useful in apparatus such as auxiliary burners used in metal melting, decarburization, refining and processing, for example, steel making in an electric arc furnace (EAF) or blast furnace.

BACKGROUND OF THE DISCLOSURE

Generally auxiliary burners are used to assist in the steel making process to add thermal energy by the combustion of fuel, the injection of oxidizing gas for melt refining, foamy slag production or post combustion of carbon monoxide, and the injection of particulates for slag and foamy slag production. In many instances, the oxidizing gas is introduced as a high velocity stream that may exceed sonic velocities.
Existing furnace burners have various deficiencies that detract from the efficiency and economy of the steelmaking process.
US 2013/086949 A1 discloses an adjustable combustion burner having the features of the preamble of claim 1. The burner allows tuning of the burner parameters using a burner insert. US 2016/076764 A1 discloses a submerged combustion burger with a burner tip that includes a generally central flow passage and includes a crown portion defining a circumferential cavity.
In order to overcome the disadvantages associated with typical burners, it would be desirable to provide a burner that optimizes efficiencies by having a burner tip defining a parabolic main oxygen nozzle and V-shaped fuel supply ports; an oxygen supply tube removably attached to a burner tip for ease of cleaning or replacement and a burner tip with a tapered outer diameter for an improved mechanical seal.

BRIEF SUMMARY OF THE INVENTION

Many other variations are possible with the present disclosure, and those and other teachings, variations, and advantages of the present disclosure will become apparent from the description and figures of the disclosure.
The invention comprises a burner, comprising an oxygen supply tube and a burner tip, wherein the oxygen supply tube and the burner tip define a concave face; wherein the burner tip defines a main oxygen nozzle having a parabolic shape.
In another aspect of a burner of the present invention, the oxygen supply tube is removably attached to the burner tip.
In yet another aspect of a burner of the present invention, an outer diameter of the burner tip is tapered.
In another aspect of a burner of the present invention, the concave face defines a plurality of V-shaped fuel supply ports.
Accordingly, a preferred embodiment of the present invention comprises a burner, comprising an oxygen supply tube removably attached to a burner tip; wherein the burner tip has a tapered outer diameter and wherein the oxygen supply tube and the burner tip define a concave face; wherein the burner tip defines a main oxygen nozzle having a parabolic shape; and wherein the concave face defines a plurality of V-shaped fuel supply ports.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

For the present disclosure to be easily understood and readily practiced, the present disclosure will now be described for purposes of illustration and not limitation in connection with the following figures, wherein:

FIG. 1 shows an exterior top, perspective view of a preferred burner according to the present disclosure;
FIG. 2 shows an exterior top, perspective and cross-sectional view of the burner of FIG. 1 including its burner tip section;
FIG. 3 shows an elevational side view of a preferred burner according to the present disclosure;
FIG. 4 shows a cross-sectional view of a burner tip of a preferred burner according to the present disclosure; and
FIG. 5 shows an elevational end view of a burner tip of a preferred burner according to the present disclosure.

DETAILED DESCRIPTION

In the following detailed description, reference is made to the accompanying examples and figures that form a part hereof, and in which is shown by way of illustration specific embodiments in which the inventive subject matter may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice them, and it is to be understood that other embodiments may be utilized and that structural, logical, and electrical changes may be made without departing from the scope of the inventive subject matter. Such embodiments of the inventive subject matter may be referred to, individually and/or collectively, herein by the term "disclosure" merely for convenience and without intending to voluntarily limit the scope of this application to any single disclosure or inventive concept if more than one is in fact disclosed.
The following description is, therefore, not to be taken in a limited sense, and the scope of this disclosure is defined by the appended claims.
FIGS. 1-5 show a preferred burner 10, such as a "decarb burner" or other types of burners such as for an EAF (Electric Arc Furnace), blast furnace or other type of metallurgical furnace, of the present disclosure, comprises an oxygen supply tube 12 and a burner tip 14 defining a concave face 15. Burner tip 14 and/or concave face 15 preferably define a groove 17 machined or otherwise, a main oxygen nozzle 13 having a parabolic shape and a plurality of V-shaped natural gas ports 16. The outer diameter 19 of burner tip 14 preferably is tapered to provide an improved mechanical seal. Also, the burner 10 preferably comprises a ceramic pilot ignitor.
Preferably, sizes of the burner tip 14 range from 76,2 mm to 152,4 mm ( 3 inches to six inches) in diameter. The burner 10 may be of various lengths and water-cooled or not water-cooled.
Preferably the oxygen supply tube 12 is removably attached to the burner tip 14 of burner 10 to provide for ease of cleaning and/or replacement of the supply tube 12 or burner tip 14.
It will be appreciated that this background description has been created by the inventors to aid the reader, and is not to be taken as an indication that any of the indicated problems were themselves appreciated in the art. While the described principles can, in some respects and embodiments, alleviate the problems inherent in other systems, it will be appreciated that the scope of the protected innovation is defined by the attached claims, and not by the ability of any disclosed feature to solve any specific problem noted herein.

Claims

A burner (10), comprising:
an oxygen supply tube (12) and a burner tip (14), characterised in that the oxygen supply tube and the burner tip define a concave face (15);

wherein the burner tip (14) defines a main oxygen nozzle (13) having a parabolic shape.
The burner (10) of claim 1 wherein the oxygen supply tube (12) is removably attached to the burner tip (14).
The burner (10) of claim 1 or 2 wherein an outer diameter of the burner tip is tapered.
The burner (10) of any one of claims 1 to 3 wherein the concave face (15) defines a plurality of V-shaped fuel supply ports.