JPS635446B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hot blast furnace for a blast furnace such as a blast furnace.

[Conventional technology]

A hot blast furnace is a regenerative heat exchanger that gives heat to the air blown to a blast furnace to make it high temperature, and is composed of a regenerative furnace that gives heat to the air and a combustion furnace that heats the regenerative furnace.

There is an internal combustion type in which a heat storage furnace and a combustion furnace are housed in the same cylindrical shell, but as shown in FIG. 3, a combustion furnace 2 is installed side by side with a gap between the heat storage furnace 1 Many of them are external combustion type, in which the upper ends of these are connected by a dome 3.

In the figure, reference numeral 2b denotes a pedestal section that supports the furnace body 2a in the combustion furnace 2, and this is integrally welded to the furnace body 2a as shown in FIG.

[Problem that the invention seeks to solve]

In a hot blast furnace as shown in Fig. 3, the height of the dome 3 must be adjusted so as not to generate excessive stress on the internal refractory and steel shell during thermal expansion. is installed in advance, and the uppermost part of the straight body of the combustion furnace 2, which has a small diameter, is adjusted and cut to match the height, and the upper dome 3 is installed.

On the other hand, during renovation, it was impossible to adjust the dome height without removing the dome 3. In order to remove the dome 3 in this manner, a large lifting machine is required, and the process of removal, maintenance, installation, etc. becomes complicated and there is a risk that a large amount of construction costs will be required.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a hot air stove whose dome reference center can be easily and reliably adjusted especially during renovation.

[Means for solving problems]

In order to achieve the above object, the present invention provides a hot blast furnace in which a regenerative furnace and a combustion furnace are installed side by side and whose upper ends are connected by a dome, in which the combustion furnace is edged by a pedestal part and a furnace main body,
The gist is that the bases protruding from the upper end of the pedestal part and the lower end of the furnace body are fastened together so that they can be separated from each other, and a space is secured between the upper end of the pedestal part and the lower end of the furnace body in which an elevator can be installed.

[Effect]

According to the present invention, the dome reference center can be adjusted without removing the dome, eliminating the need for a large lifting machine, reducing construction costs and shortening the construction period.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a longitudinal sectional front view showing one embodiment of the hot blast stove of the present invention, and Fig. 2 is a longitudinal sectional front view of the main parts of the same. On the other hand, the combustion furnaces 2 are arranged side by side and their upper ends are connected by a dome 3, which is similar to the conventional example, but in the present invention, the combustion furnace 2 is separated from the furnace body 2a and the pedestal part 2b that supports it. I decided to do so.

As shown in FIG. 2, a combustion furnace support base 4 is provided on the outer periphery of the upper end of the pedestal section 2b, and a base 5 is provided on the lower end of the main body 2a. It is passed through in the direction and fastened so that it can be separated. A space is secured between the temporary jack upper seat 7 provided on the base 5 side and the top of the base 4 in which a temporary jack 8 as an elevator can be interposed, and a base liner 9 as an adjustment support means is provided between the bases 4 and 5. It was decided that it would be possible to intervene.

The temporary jacks 8 are disposed at appropriate intervals in the circumferential direction outside the cylindrical body of the combustion furnace main body 2a.

Next, to explain how to use it, in a hot blast stove, with respect to the dome reference level core a, the dome reference level on the regenerative furnace side is the base point, and the combustion furnace core B is lower than the dome reference level, or the combustion furnace core C is higher than the dome reference level. There is. To adjust core B or core C to core A during new construction and renovation work of a hot blast stove, the height of the core is adjusted by jacking up or down the base of the combustion furnace 2.

The above adjustment is performed by loosening the combustion furnace fixing bolts 6, raising and lowering the temporary jack 8 installed between the combustion furnace receiving base 4 and the temporary jack upper seat 7 provided on the base 5 on the combustion furnace main body 2a side. By vertically or horizontally displacing the dome 3, the height of the dome 3 or the inclination of the combustion furnace main body 2a can be adjusted.

Then, this adjustment is made by changing the thickness of the base liner 9 to ensure this condition. Further, in this case, the combustion furnace bottom plate 10 is attached after the wick adjustment is completed.

〔Effect of the invention〕

As described above, the hot blast stove of the present invention is a hot blast stove in which a regenerative furnace and a combustion furnace are installed side by side, and the upper ends are connected by a dome, and the dome reference core can be adjusted easily and quickly without removing the dome. Therefore, it is possible to reduce construction costs and shorten the construction period during renovations.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing one embodiment of the hot air stove of the present invention, Fig. 2 is a longitudinal sectional front view of the main parts of the same, Fig. 3 is a longitudinal sectional front view of a conventional example, and Fig. 4 is the main parts of the same. FIG. 1... Regenerative furnace, 1a... Cylindrical straight body, 1b...
Conical part, 2... Combustion furnace, 2a... Furnace body, 2
b... Frame section, 3... Dome, 4... Combustion furnace support base, 5... Base, 6... Bolt, 7... Temporary jack upper seat, 8... Temporary jack, 9... Base liner, 10... ...bottom plate.

Claims (1)

[Claims] 1. In a hot blast furnace in which a heat storage furnace and a heat firing furnace are installed side by side, and the upper ends are connected by a dome, the combustion furnace is edged between the pedestal part and the furnace body, and the bases protruding from the upper end of the pedestal part and the lower end of the furnace body are mutually connected. A hot blast stove characterized in that the two are separably fastened together, and a space is secured between the upper end of the pedestal and the lower end of the furnace body in which an elevator can be installed.