JP2000292066A - Tilting unit for tilting thermal storage burner of melting furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inject a combustion flame in a wide range and to improve a melting effect by mounting a pair of thermal storage burners having a tilting unit at a sidewall of a molten metal furnace body and including burner nozzles in vertical or lateral specific angle range toward a material to be melted in a furnace. SOLUTION: A combustion flame is injected from a burner nozzle to a material A to be melted placed in a melting furnace body 1 and the material is melted. In this case, when a rod of a cylinder 7 is retracted, a thermal storage burner 3 is inclined to an upper position 3a on a shaft 8a of a vertical bracket 8, and hence the flame is injected down to melt a lower portion of the material A. Meanwhile, when the rod is extended, the burner 3 is inclined to a lower position 3b, and hence the flame is injected upward, and an upper portion of the material A can be melted. The burner 3 is inclined in ranges of 20 to 30 degrees in vertical or lateral direction. Thus, the overall material A can be uniformly melted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting apparatus for a regenerative burner in a melting furnace, and more particularly to a regenerative burner in a melting furnace capable of efficiently melting a material to be melted in a nonferrous metal melting furnace. The present invention relates to a tilting device for a burner.

[0002]

2. Description of the Related Art In recent years, a regenerative burner device comprising a burner and a heat storage element has been used as a combustion burner in a melting furnace. This regenerative burner is a burner system that recovers exhaust heat using a regenerator and preheats combustion air. It has high thermal efficiency and suppresses significant energy and NOx generation. Has been adopted.

The regenerative burner is a combination of a burner and a regenerator, and is disposed in a furnace at least in pairs. When one of the burners burns, combustion air is supplied to the combustion burner via the regenerator. In the other non-combustion burner, high-temperature exhaust gas in the furnace is sucked through the heat storage body and heat is exchanged by the heat storage body to store heat, and the next combustion is performed. Sometimes, the combustion air is alternately switched and burned by heating the combustion air with the heat storage body. The pair of regenerative burners are arranged at opposing positions on both side walls of the melting furnace main body, or are arranged so as to be parallel without opposing each other.

[0004]

However, since the above-mentioned regenerative burner is of a fixed type and the angle of the burner is constant, the portion where the combustion flame injected from the burner nozzle hits the narrow range of the material A to be melted. However, there is a problem that the dissolving time is prolonged, and the dissolving ability and the calorific value are poor.

[0005] If the melting time is prolonged, the operation cycle time is prolonged, the production capacity is reduced and the amount of combustion exhaust gas is increased, which causes pollution and cannot contribute to the prevention of global warming. there were.

The present invention has been developed with the object of solving the above-mentioned problems. By oscillating the regenerative burner at a fixed angle, the combustion flame injected from the burner nozzle can be widely spread over the material to be melted. An object of the present invention is to provide a tilting device of a regenerative burner in a melting furnace which can be applied over a range and can melt a material to be melted efficiently.

[0007]

According to the present invention, at least one pair of regenerative burners provided with a tilting device is mounted on a side wall surface of a melting furnace body. A tilting device for a regenerative burner in a melting furnace was developed and adopted in which the burner nozzle was swung up and down or left and right within a range of 20 to 30 degrees toward the material to be melted in the furnace.

Further, in the present invention, at least a pair of regenerative burners provided with a tilting device are attached to the ceiling surface of the melting furnace body, and the burner nozzle is directed to the material to be melted in the furnace by 20 to 30 degrees back and forth or left and right. A tilting device for a regenerative burner, which is configured to swing in the range described above, was developed and adopted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 4 show a first embodiment of the present invention. In the melting furnace main body, a pair of left and right openings 2 and 2 having a constricted portion at the rear portion at substantially the center in the height direction of both side wall surfaces 1a and 1a are provided. The regenerative burners 3, 3 are attached to the material to be melted A with a slight inclination, and the regenerative burners 3, 3 can be swung by a tilting device.

The tilting device can be roughly classified into a cylindrical casing 4, a frame 6 having a U-shaped plane, a cylinder 7 for swinging the regenerative burner 3 in the vertical direction, or a regenerative burner. And a cylinder 9 for swinging the head 3 in the left-right direction.

The casing 4 is formed in a cylindrical shape.
The tip of the regenerative burner 3 is fitted to the cylindrical casing 4. A spring 5 is disposed around the cylindrical casing 4, and one end of the spring 5 is connected to the opening 2 and the rear end wall 2.
a, 2a, and the other end is engaged with the casing rear face plate 4a and stretched.

As shown in FIG. 4, the frame 6 has a horizontal U-shape in plan view. The casing 4 is located on the inner side of the frame 6 and the casing rear plate 4a is in contact with the frame 6.

Reference numeral 7 designates regenerative burners 3, 3 in the vertical direction.
An electric cylinder that swings in the range of up to 30 degrees. One end is pivotally supported by the vertical bracket 8 and the other end is pivotally supported by the heat storage burner main body.

9 is a regenerative burner 3, as shown in FIG.
An electric cylinder for swinging the bracket 3 in the range of 20 to 30 degrees in the left-right direction. One end of the cylinder is supported by the bracket 10 and the other end is supported by the frame 6. Instead of the electric cylinder 9 and the electric cylinder 7, a hydraulic cylinder or an air cylinder can be used.

When the swing angle of the regenerative burners 3 and 3 is not more than 20 degrees in the vertical direction or the horizontal direction, the area where the combustion flame injected from the burner nozzle hits the material to be melted A is small. The time becomes longer and the efficiency of the furnace becomes worse. If the temperature is 30 ° C. or more, the material to be melted A and the other part (furnace inner wall) are exposed to the combustion flame, so that the furnace inner wall (refractory) is damaged and adversely affected.

The heat storage chamber 11 contains a large number of heat storage bodies 12 such as alumina balls. At the bottom of the heat storage chamber 11, there is formed an inclined duct 13 which serves both for supplying the outside combustion air and discharging the exhaust gas from the furnace.

The use state of the present invention configured as described above will be described. The material to be melted A piled up in the melting furnace body 1 is melted by blowing a combustion flame from a burner nozzle. As shown by the solid lines in FIGS. 1 and 2, the regenerative burner 3 is melted by blowing a combustion flame on the material A to be melted in a slightly inclined state.
When the rod of the cylinder 7 is pulled in, the regenerative burner 3 is tilted with the axis 8a of the vertical bracket 8 as a fulcrum, and becomes an upper position 3a indicated by a two-dot chain line, that is, an upper position further inclined than the original inclined position. The lower position of the dissolving material A can be dissolved.

When the rod is pulled out, the regenerative burner 3 moves to the lower position 3b shown by the two-dot chain line, and
Can be dissolved in the upper position of. That is, it is possible to oscillate within a range of 20 to 30 degrees in the vertical direction from the original inclined position, and apply a combustion flame over a wide range from below to above the material A to be melted piled up in the furnace, It can be dissolved in a shorter time than before.

As shown in FIG. 4, when the rod of the cylinder 9 is pulled out, the frame 6 is brought to a position 6a indicated by a two-dot chain line inclined to the left as shown by a two-dot chain line, and the regenerative burner 3 is accordingly moved to the position 6a. The position of the dotted line 3a is reached, and the material A to be melted can be melted at the right position.

When the rod of the cylinder 9 is pulled in, the frame 6 is tilted rightward as indicated by a two-dot chain line to a position 6b indicated by a two-dot chain line, and the regenerative burner 3 is accordingly set to a position 3b indicated by a two-dot chain line. The material A to be melted can be melted at the left position.

In short, even if the piled material A to be melted spreads in the furnace width direction or spreads in the furnace length direction, by operating the up / down swing cylinder 7 or the left / right swing cylinder 9, Either case can be dealt with and efficient dissolution can be achieved.

FIGS. 5 and 6 show a second embodiment of the present invention. The difference from the first embodiment is that the regenerative burner 3 is mounted on the side wall surface 1a. The tilting device is different from the first embodiment in that a cylindrical casing into which the distal end of the regenerative burner 3 is fitted is provided. 4, a frame 6 in which the casing 4 fits into a U-shape and a cylinder 7 for swinging the regenerative burner 3 in the front-rear direction or a cylinder 9 for swinging the regenerative burner 3 in the left-right direction. , And the other structures and operational effects are not different at all. Therefore, each part is denoted by the same reference numeral as in the first embodiment.

According to this embodiment, if the rod of the cylinder 7 shown in FIG. 5 is moved in and out, the regenerative burner 3 swings within the range of 20 to 30 degrees in the front-rear direction and the rod of the cylinder 9 By moving in and out, it is possible to swing in the range of 20 to 30 degrees in the left and right direction, and even if the piled material A to be melted spreads in the furnace width direction or spreads in the furnace length direction, Either of them can be used and can be dissolved efficiently

[0024]

As described above, according to the tilting apparatus for a regenerative burner in a melting furnace of the present invention, the following excellent effects are obtained. . When the regenerative burner is installed on the side wall surface, the regenerative burner can be swung in the vertical direction or left and right direction. Can be directly heated by applying the combustion flame injected from the furnace over a wide range of the material to be melted. it can. . There is no local heating of the material to be melted, and the oxidation loss of the material to be melted is reduced, so that the material can be melted with a good yield and it is economical. . The heat-receiving area load of the material to be melted is increased, the melting time is shorter than that of the conventional burner, and the melting capacity and the calorific value unit can be improved. . By shortening the melting time, the operation cycle time is shortened and the production capacity can be improved. . The swing of the regenerative burner can improve the efficiency of the furnace and improve the environment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part.

FIG. 3 is an enlarged longitudinal sectional view of the regenerative burner of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a plan view showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Melting furnace main body 1a Side wall surface 1b Ceiling surface 3 Regenerative burner A Material to be melted

Claims (2)

[Claims] 1. At least a pair of regenerative burners provided with a tilting device are attached to both side walls of a melting furnace body, and a burner nozzle is turned up and down or left and right within a range of 20 to 30 degrees toward a material to be melted in the furnace. A tilting device for a regenerative burner in a melting furnace configured to swing. 2. At least a pair of regenerative burners provided with a tilting device are attached to a ceiling surface of a melting furnace main body,
A tilting device for a regenerative burner in a melting furnace, wherein the burner nozzle is configured to swing back and forth or left and right within a range of 20 to 30 degrees toward a material to be melted in the furnace.