Combustion – Fuel disperser installed in furnace – Plural feed means extending to common wall opening of furnace
Patent
1999-06-08
2000-07-18
Yeung, James C.
Combustion
Fuel disperser installed in furnace
Plural feed means extending to common wall opening of furnace
431155, 431189, F23C 506
Patent
active
060898585
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
(i) Field of the Invention
The present invention relates to a device for protecting an ejection outlet of a burner mounted through a wall of a furnace, of the type comprising a peripheral heat shield and means of mounting the said heat shield around the ejection outlet of the burner.
The invention also relates to a heating device comprising a burner and a protection device of the aforementioned type.
(ii) Description of Related Art
In certain applications, such as, for example, in rotary iron-smelting furnaces, the burners used suffer greatly, on the one hand on account of the thermal radiation and, on the other hand, on account of the chemical attack caused by the substances that result from the smelting of the iron. In this type of furnace, it is known practice to provide means for water-cooling the ejection tip of the burner. These cooling means comprise a tubular protection member through which cooling water flows. This tubular member is mounted axially at the tip of the burner and projects into the furnace.
Such an arrangement is somewhat impractical because it requires the installation of a costly and bulky piece of equipment designed to allow water to flow through the protection member. Furthermore, the presence of a water circuit runs the risk of the circuit bursting if the furnace is shut down when the temperature is below 0.degree. C.
SUMMARY AND OBJECTS OF THE INVENTION
The object of the invention is to propose a device for protecting the ejection outlet of a burner and a heating device comprising it, which do not have the drawbacks mentioned hereinabove, and which makes it possible to dispense with the use of a water circuit which is bulky and the cause of malfunctions.
To this end, the subject of the invention is a device for protecting an ejection outlet of a burner, of the aforementioned type, characterized in that the heat shield has a consumable structure made of refractory material and the said mounting means comprise means of moving the heat shield relative to the wall of the furnace, between at least two positions which are spaced apart along the axis of the burner.
According to particular embodiments, the protection device has one or more of the following characteristics: such that the heat shield is borne by the burner; oxidizing agent, which jacket is tubular over at least part of its length, and the movement means comprise a guide member pushed over the tubular part of the jacket, so as to allow the heat shield to slide along the jacket; O-ring pressed against the exterior surface of the tubular part of the jacket, and means of clamping the two flanges together so as to compress the O-ring, thus keeping the heat shield in position relative to the jacket of the burner; aluminosilicate containing, by mass, x % of SiO.sub.2 and y % of Al.sub.2 O.sub.3 with an x/y ratio of between one third and two thirds and, in particular, close to one half; exceeds 90%; and a temperature in excess of 1000.degree. C.
Another subject of the invention is a heating device comprising a burner associated with a protection device as defined hereinabove.
The invention will be better understood from reading the description which will follow, given merely by way of example and made with reference to the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagrammatic view in longitudinal section of a rotary irons-melting furnace equipped with a burner according to the invention;
FIG. 2 is a view in longitudinal section of a burner associated with a new protecting device according to the invention; and
FIG. 3 is a view in longitudinal section of the burner of FIG. 1 associated with a protecting device according to the invention which has already been operating for a lengthy period.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Depicted in FIG. 1 is a rotary iron-smelting furnace 10 equipped with a burner according to the invention. The furnace comprises a chamber 12 with a horizontal axis of rotation denoted X--X. The chamber 12 is delimited along its main part by a cyl
REFERENCES:
patent: 1930812 (1933-10-01), Kunitz
patent: 4726763 (1988-02-01), Newman
patent: 4986748 (1991-01-01), Brown et al.
patent: 5267850 (1993-12-01), Hisashi et al.
patent: 5785721 (1998-07-01), Duane
Beaudoin Philippe
Loiselet Benoit
L'air Liquide, Societe Anonyme pour l'Etude de l'Exploitation de
Schulman Robert M.
Yeung James C.
LandOfFree
Device for protecting the injection tip of a burner and heating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for protecting the injection tip of a burner and heating , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for protecting the injection tip of a burner and heating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2030429