JPS62155488A - Regulator for quantity of heat transfer of heating furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]; 1. Field of industrial application] The present invention relates to a heat transfer amount adjusting device for a heating furnace, and relates to a device for adjusting the amount of heat transfer in a heating furnace. The present invention relates to a heat transfer amount adjusting device that can equalize the amount of heat.

[Traditional technique (nei)]

-C, the heating furnace has a furnace main body divided into a preheating zone, a heating zone, and a soaking zone in the longitudinal direction, and a large number of burners are arranged on the tea utensils, so that the temperature side 1111 is performed for each tea utensil. A north part is formed at the boundary between each band, and the height inside the furnace is smaller than other parts. F
The burner is installed so that it can be operated independently without being affected by the ing.

By the way, in the above-mentioned temperature control for each tea utensil, the furnace temperature of the upstream side zone is generally set high, so the amount of heat transferred to the workpiece at the boundary between each zone, that is, the nose section, is as follows: The amount from the upstream side is larger than the star from the downstream side. Therefore, the upstream side of the material to be heated becomes hotter than the downstream side, and in particular, a material with a small cross section such as a billet tends to curve into a convex shape toward the upstream side. As a result, in the past, billets would topple over during transportation, or tracking errors would occur due to changes in billet spacing, which would hinder extraction operations, making stable operation of the processing furnace difficult and reducing productivity. There was a problem with the decline.

In the conventional heating furnace, this kind of fin.

In order to prevent accidents such as bending and tipping over, operations are often carried out to reduce the difference in temperature inside the furnace between each zone. According to such a method, the difference in the transmission 2H between the upstream side and the downstream side of the material to be heated at the nose portion is reduced, and therefore billet bending and falling accidents can be prevented, and the bottom surface of the billet can be prevented. Skid marks near the skid button can also be improved.

3. Problems to be Solved by the Invention] However, in the above conventional method, since the furnace temperature in the downstream zone is increased to reduce the temperature difference between each zone, it is inevitable that the combustion amount in the downstream zone will be increased more than necessary. It will be enlarged to
The amount of combustion exhaust gas increases accordingly, and the temperature of the exhaust gas at the bottom of the furnace increases.As a result, in the conventional heating furnace, the exhaust gas loss increases and the fuel consumption rate deteriorates.

The present invention has been made to solve these conventional problems, and can improve the heating quality of the heated material by equalizing the amount of heat transferred from the downstream and upstream sides of the heated material at the nose part. Another object of the present invention is to provide a heat transfer amount adjusting device for a heating furnace that can prevent bending, improve operational stability, and increase fuel consumption by 4 degrees.

[Means for solving problems]

The present invention provides a heating furnace in which a nose portion is formed at the boundary of each temperature control zone, and a plate-shaped radiant member with high heat resistance and air permeability is provided at least above the inlet portion of the nose portion in the width direction of the furnace. , and is arranged so as to be substantially perpendicular to the flow of exhaust gas.

Here, the heat resistance of the radiant member in the present invention is appropriately determined by the set temperature of the temperature control zone in which the radiant member is installed, and the air permeability may be at a level that does not interfere with furnace pressure control. This can be realized, for example, by molding and firing ceramic into a honeycomb-like or cotton-like plate-like body.

: Effect] In the heat transfer amount adjusting device according to the present invention, the radiant member is heated by the high temperature combustion exhaust gas from the upstream side zone, and the amount of heat transferred from the downstream side of the nose portion to the heated material is increased by the radiant heat from the member. As a result, the amount of heat transferred from the downstream side and the amount of heat transferred from the upstream side are equalized, and as a result, the temperature of the heated material rises uniformly, improving the cutting quality and preventing bending during operation. Furthermore, since there is no need to raise the temperature of the downstream zone more than necessary, the exhaust gas loss is reduced by σ, and the fuel consumption rate is improved.

〔Example] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 are for explaining a heat transfer amount adjusting device for a heating furnace according to an embodiment of the present invention. In FIG. 2 showing the overall configuration of a heating furnace in which the heat transfer amount adjusting device is installed, 1 is a walking beam type billet continuous heating furnace, which mainly consists of a furnace body 2, an uptick type flue 3, , a billet charging and extraction device 4, and a billet in-furnace conveying device 5.

The furnace main body 2 has a preheating zone 7. Heating zone8. It consists of 9 soaking zones. Nose portions 15.16 are formed at the boundaries of the tea kettle, and the height inside the furnace is lower than the other portions, and each of these nose portions 15.16 is formed by recessing the ceiling wall downward into upper nose portions 15a, 16a. and lower nose parts 15b and 16b formed by recessing the floor wall upwards, and a large number of burners 6 are arranged in the furnace width direction on the burner wall which is the vertical wall of each nose part.

The billet in-furnace transfer device 5 is of an eccentric walking beam type, and includes a fixed beam 10 fixed in the furnace as a king, and a moving beam 11 that moves rectangularly in the furnace.
The frame 12 supports and drives the movable beam 11 outside the furnace, an eccentric wheel device 13 that moves the frame 12 up and down, and a cylinder device 14 that moves the frame 12 back and forth. 10. The upper surface of the moving beam 11 is located approximately at the center of the furnace body 2 in the height direction.

and the respective upper and lower nose portions 15a, 15b.

And on the inlet side of 16a, 16b, that is, on the downstream side in the flow direction of exhaust gas G, radiation plates 17a, +7b and 18a, 18b, which are the heat transfer product adjusting device of this embodiment, are arranged so as to be substantially perpendicular to the flow direction of exhaust gas G. , and its upstream surface is
The mounting angle is selected so as to face the downstream side of the billet W located at the nose portion 15, 16. Each of the above radiation plates 17a, 17b, +8a, 18
b is a plate-like body formed by molding and firing a highly heat-resistant ceramic into a highly breathable shape, such as a honeycomb shape, or by molding and firing ceramic fiber into a cotton-like shape. And the upper radiation plate 1
7a and +8a have a width approximately equal to the width inside the furnace, and a height between the lower surface of the upper nose portions 15a and 16a and the billet W which is the material to be heated.
The lower radiating plates 17b, 18b have the same width as the upper one, and the height is the distance between the upper surface of the lower nose portions 15b, 16b and the lower surface of the moving beam II. It is a slightly lower plate-like body.

Next, the effects of this embodiment will be explained.

In the device of this embodiment, heating zone 8. During so-called energy-saving operation, in which the burner 6 in the soaking zone 9 is ignited and the burner 6 in the preheating zone 7 is extinguished, the preheating zone 7. heating zone 8
Since the effect at the nose portion 15 in between is large, this portion will be explained.

During this energy-saving operation, the temperature of the preheating zone 7 is significantly lower than that of the heating zone 8, so in the conventional heating furnace,
As mentioned above, the amount of heat transferred to the billet W in the nose portion 15 from the heating zone 8 side is significantly larger than that from the preheating zone 7 side, and therefore the temperature of the heating zone 8 side portion of the billet W is lower than that of the heating zone 8 side. There was a problem in that the temperature of the heating zone 7 side became higher than that of the heating zone 8 side, and the heating zone 8 side was curved in a convex shape.

On the other hand, in this embodiment, the upper and lower nose portions 15a,
A radiation plate 17a is provided at the inlet of 15b.

17b, it is heated by the high-temperature exhaust gas G, and this radiation plays) 17a.

The amount of heat transferred by radiation from 17b is transferred from preheating zone 7%i
Therefore, the amount of heat transferred from the heating zone 8 is equalized, and as a result, the temperature of the billet W becomes uniform and bending is prevented.

In addition, since the heating zone 8 is set at a lower temperature than the soaking zone 9, in the conventional heating furnace, the temperature at the nose section 16 tends to be similar to that at the nose section 15, and the bending of the belay W is prevented. Although there was a problem, in this embodiment, even in the nose portion 16, the heat transfer force is adjusted by nine rounds by the action of the radiation plays 1-18a and 18b, and the billet can be prevented from bending.

Also, in this case, the radiation plates 17a, +7b and 18
Since portions a and 18b are highly permeable, these radiation plates hardly act as exhaust gas resistance and affect the furnace pressure.

In this way, in this embodiment, the nose portion 15. and radiant plates 17a, 17b and 18a at I6.

18b, the amount of heat transferred from the downstream side zone to the billet W and the amount of heat transferred from the upstream side zone to the billet W can be equalized, the heating quality of the billet W can be improved, and the billet W can be prevented from bending to improve operation. Stability can be improved.

Furthermore, in this embodiment, when the amount of heat transfer is made uniform, there is no need to increase the amount of combustion in the downstream side zone more than necessary as in the conventional case, and therefore, the exhaust gas loss can be reduced accordingly and the fuel consumption rate can be improved.

In the above embodiment, the radiation plate is provided on both the top side and the bottom side of the nose part, but in the present invention, the lower radiation plate is not necessarily required, and at least the upper radiation plate is provided. Bye.

The reason for doing this is that since more combustion exhaust gas flows through the upper part of the billet W, it is effective to arrange the radiation plate in this upper part.

Further, in the above embodiment, the case of a walking beam type billet heating furnace was explained, but the present invention is applicable not only to billets but also to heating slabs, blooms, etc. in a continuous type heating furnace such as a walking hearth type. Of course it can be applied.

〔Effect of the invention〕

As described above, according to the heat transfer amount adjusting device for a heating furnace according to the present invention, since the radiant member with good blowout resistance and air permeability is disposed at least in the upper part of the nose portion on the inlet side, the heated material can be heated. It has the effect of uniformly heating and improving heating quality, preventing bending and improving operational stability, and improving fuel consumption.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a heat transfer adjustment device for a heating furnace according to an embodiment of the present invention, and FIG. 2 is an overall configuration diagram of a heating furnace to which the device of the above embodiment is applied. In the figure, ■ is a heating furnace, 7, 8, and 9 are respectively a child orbital zone, a heating zone, and a soaking zone (temperature control ■ zone), 15° and 16 are nose parts, 15a, +6a are upper nose parts, 15b, 16b
are lower nose portions, 17a and 17b. 18=, +8b is a radiation plate (radiation member), G is combustion exhaust gas, and W is a billet (heated material).

Claims (2)

[Claims] (1) It is divided into multiple temperature control zones in the longitudinal direction, and a nose section with a lower height inside the furnace than other sections is formed at the boundary of each zone, and the material to be heated is continuously heated while being conveyed in the longitudinal direction. In the type heating furnace, a plate-shaped radiant member with high heat resistance and air permeability is arranged at least in the upper part of the inlet side of the nose part in the width direction of the furnace and substantially perpendicular to the flow direction of the combustion exhaust gas. A heating furnace heat transfer amount adjustment device characterized by: (2) The nose portion consists of an upper nose portion formed by recessing the ceiling wall downward and a lower nose portion formed by recessing the floor wall upward, and each of the lower nose portion and the upper nose portion 2. The heat transfer amount adjusting device for a heating furnace according to claim 1, wherein the radiant member is disposed on the inlet side of the heating furnace.