JPS6334204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating furnace in which the inside of a heating chamber is heated by a burner.

Generally, a conventional heating furnace has a structure in which a plurality of burners whose axes are parallel to each other are installed on the furnace wall, and the interior of the heating chamber is heated by the burners.

In a heating furnace configured like this, the axes of the burners are parallel to each other, so the combustion gas injected from each burner flows through the heating chamber along a nearly constant path without interfering with each other. . As a result, there are parts in the heating chamber that are located on the path of the combustion gas and parts that are off the path, and the temperature of the part that is outside the path of the combustion gas is lower than the temperature of the part that is on the path. There was a problem that temperature variations occurred in each part.

This invention was made to solve the above-mentioned problem, and an object thereof is to provide a heating furnace that can equalize the temperature of each part of the heating chamber.

In order to achieve the above object, the present invention installs a plurality of main burners on one furnace wall so as to be spaced apart from each other in the entire width direction of the furnace wall, and sub-burners whose axes intersect with the axis of the main burner. The combustion gas injected from the main burner and sub-burner is arranged on a flat surface, and the combustion gas injected from each burner interferes with each other to direct the combustion gas to each part of the heating chamber, thereby making the temperature inside the heating chamber uniform. It is a diagram. In this case, it is desirable that the plane on which the axis of the sub-burner is located is substantially perpendicular to the axis of the main burner.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. 1 is a partially cutaway plan view of a heating furnace according to the present invention, FIG. 2 is a partially cutaway front view thereof, and FIG. 3 is a partially cutaway side view thereof.

As shown in these figures, this heating furnace includes two furnace bodies 1 and 2. Since these furnace bodies 1 and 2 have similar configurations, the following will explain the furnace body 1 side, and the same parts on the furnace body 2 side will be given the same reference numerals and the explanation thereof will be omitted. do.

As shown in FIG. 1, the furnace body 1 has a substantially rectangular shape in plan view, and includes a front wall portion 3 and a rear wall portion 4 that are parallel to each other, and a side wall portion 5 that is perpendicular to the front and rear walls 3 and 4. , 6, a ceiling part 7 and a hearth part 8. The inside of the furnace body 1 is defined as a heating chamber 9. Note that the upper part of the wall defining the heating chamber 9, that is, the upper part of the front, rear and side walls 3, 4, 5, 6, and the ceiling part 7 are lined with ceramic fibers. This reduces heat storage loss and dissipation loss, and makes the furnace wall capable of withstanding continuous operation at high temperatures (in this case, used at around 1250°C).

Most of the front wall portion 3 is cut out, and there is an inlet 10 for carrying the object to be heated into the heating chamber 9.
is formed. This entrance 10 is a furnace door 11
It is designed so that it can be opened and closed by. In addition, the furnace door 11 is pressed against the front wall part 3,
A crimping device (not shown) is provided to prevent cold air from being sucked in as much as possible.

Three main burners 12 are installed at the upper end of the side wall 5 so as to be spaced apart from each other in the vertical direction in FIG. 1, that is, in the width direction of the side wall 5. Of these three main burners 12, the two on the rear wall 4 side have their axes aligned with the side wall 5.
The axis of the other one is oriented in the horizontal direction, but as you go from the rear end to the front end, the two main burners 1
It is slightly inclined so that it gradually separates from 2.

Further, a sub-burner 13 is installed at the lower end of the rear wall 4 on the side wall 5 side. This sub-burner 13 has its axis perpendicular to the rear wall portion 4. Therefore, the axis of the sub-burner 13 is perpendicular to the axis of the two main burners 12 on the rear wall 4 side, and at an angle other than 90° with the axis of the main burner 12 on the front wall 3 side. They will be located on intersecting vertical planes (planes).

Further, the lower end of the side wall portion 6 is connected to the furnace body 2, and a communication flue 14 is formed in the continuous portion thereof, each end of which opens into each heating chamber 9 of the furnace bodies 1 and 2. . This communication flue 14 is formed to reduce fuel costs. In other words, this heating furnace is normally used with one furnace body 1, 2 in operation while the other furnace body 2, 1 is stopped; however, when repairing the furnace body 1, 2 while it is in operation, In advance of this, combustion gas is introduced from the heating chambers 9 of the furnace bodies 1, 2 to the heating chambers 9 of the furnace bodies 2, 1 through the connecting flue 14 to heat the furnace bodies 2, 1 while the furnace bodies 2, 1 are at rest. The temperature inside room 9 is raised. As a result, fuel costs can be significantly reduced compared to the case where the temperature inside the heating chamber of the furnace bodies 2, 1 that is inactive is raised again from room temperature.
In addition, by introducing combustion gas from the heating chamber 9 of one furnace body 1, 2 to the heating chamber 9 of the other furnace body 2, 1 and preheating the object to be heated in the other heating chamber 9, the fuel This makes it possible to further reduce costs. The communication flue 14 is opened and closed by a partition 16 that is moved up and down by a lifting device 15. If the connecting flue 14 is closed by the partition 16, the furnace body 1,
Two sides can be used as one independent furnace.

In addition, the code 17 in the figure is a flue, and this flue 1
Combustion gas injected from the main burner 12 and the sub-burner 13 is discharged to the outside through the chimney 7 and the chimney 18.

In the heating furnace configured as described above, when only the main burner 12 is ignited, the combustion gas injected from the main burner 12 spreads over almost the entire width direction of the side wall portion 5 as indicated by the solid line arrow in FIG. As shown in , the water tends to flow approximately parallel to the rear wall portion 4 . On the other hand, when only the sub-burner 13 is ignited, the combustion gas injected from the sub-burner 13 tends to flow approximately parallel to the side wall portion 5, as shown by the broken line arrow in FIG. However,
When both burners 12 and 13 are ignited at the same time,
The combustion gases injected from both burners 12 and 13 interfere with each other, and each combustion gas deviates from a fixed flow path and heads toward each part within the heating chamber 9. Therefore, the temperature of each part within the heating chamber 9 can be made uniform.

Further, in the case of this embodiment, since the sub-burner 13 is installed at the lower end of the rear wall 4 on the side wall 5 side where the main burner 12 is installed, the temperature of each part of the heating chamber 9 can be made even more uniform. can. That is, in the heating furnace configured as described above, the main burner 1
2 was ignited and the temperature of each part of the heating chamber 9 was measured. As a result, the temperature was lowest at the intersection of the side wall 5 and the hearth 8 and the upper part near the intersection. In this respect, in this embodiment, the side wall portion 5 of the rear wall portion 4
Since the sub-burner 13 is installed at the lower end of the side,
The low-temperature portion can be directly heated, thereby making it possible to further equalize the temperature of each portion of the heating chamber 9.

In addition, in the above embodiment, two furnace bodies 1,
2 is installed, however, the present invention is not limited to these, and it goes without saying that the present invention may be applied to a heating furnace having only one furnace body.

As explained above, according to the heating furnace of the present invention, a plurality of main burners are installed on one furnace wall so as to be spaced apart from each other in the entire width direction of the furnace wall, and the sub-burner is arranged such that the axis thereof coincides with the axis of the main burner. Because they are arranged so that they are located on intersecting planes, the combustion gas injected from each of the main burner and sub-burner interferes with each other, and as a result, the combustion gas heads to each part of the heating chamber. As a result, it is possible to achieve the effect that the temperature of each part of the heating chamber can be made uniform.

[Brief explanation of drawings]

The attached FIGS. 1 to 3 show one embodiment of the present invention, FIG. 1 is a partially cutaway plan view thereof, FIG. 2 is a partially cutaway front view thereof, and FIG. 3 is a partially cutaway plan view thereof. It is a notch side view. DESCRIPTION OF SYMBOLS 1, 2... Furnace body, 3... Front wall part, 4... Rear wall part, 5, 6... Side wall part, 7... Ceiling part, 9... Heating chamber, 12... Main burner, 13... …Subvarna.

Claims (1)

[Claims] 1. A furnace in which a plurality of main burners are installed on one of the furnace walls defining a heating chamber of a furnace body, spaced apart from each other in the entire width direction of this one furnace wall, and defining the heating chamber. A heating furnace comprising a sub-burner installed on a wall on a plane whose axis intersects with the axis of the main burner.