JPH0327840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a furnace wall structure made of ceramic fibers and a construction method thereof.

(Prior art) Furnaces for steel, non-ferrous metals, petrochemicals, ceramics, and other industries often have furnace wall structures lined with ceramic fibers, which are excellent in energy saving and thermal response. With the advent of the modular construction method, in which ceramic fibers are made into modules and installed by attaching them to the steel shell, the scope of application to high-temperature furnaces has been expanded.

The biggest problem with the above module construction method is that gaps are created between the modules, and hot gas reaches the steel shell through these gaps, causing the steel shell to become red-hot.

In order to prevent this occurrence, various measures have been attempted that take into account the arrangement of modules, the method of compression, etc.

A fiber-on-fiber method is a construction method that has been widely adopted recently. This construction method is
As shown in a partial cross section in FIG. 6, ceramic fiber modules 2 (hereinafter simply referred to as modules) are attached to the steel shell 1 using anchor hardware 3 with packing 4 interposed between the modules 2. Veneering modules 5 are attached to the surface facing the inside of the furnace using mortar as a fireproof adhesive with a packing 6 interposed between them.

According to the above-mentioned fiber-on-fiber construction method, the hot gas in the furnace does not come into direct contact with the module 2, and the surface temperature of the module 2 inside it is lowered by the veneering module 5, which causes a gap between the modules 2 to occur. is suppressed. Only the veneering module 5 on the inner surface of the furnace is damaged.
It becomes possible to use only the material of the veneering module 5 for high temperature use, and it can be constructed economically. The veneering module 5 and its fire-resistant adhesive suppress the intrusion of hot gases. This construction method is said to have the following advantages.

(Problems to be Solved by the Invention) However, although the fiber-on-fiber construction method has the above-mentioned advantages, in reality, the veneering module 5 facing the inside of the furnace sometimes peels off and falls off. When the veneering module 5 peels off in this way, the module 2 is exposed in the furnace and is damaged due to embrittlement due to recrystallization of its surface.During repairs, it is difficult to remove the mortar used initially as an adhesive. Further, there was a problem in that recrystallization and powdering of the surface of the module 2 after removal made it difficult to reinstall the veneering module 5.

In view of this, the present invention provides a furnace wall structure made of ceramic fiber, which eliminates any peeling or falling of the surface material facing the inside of the furnace, and has good workability when repairs are required.
The present invention aims to solve the problems of the prior art by providing a method of constructing the furnace wall structure with high efficiency.

[Structure of the invention] (Means for solving the problems) In order to achieve the above object, the present invention includes the following:
The first invention has a structure in which the surface of ceramic fiber modules facing the inside of the furnace, which are arranged and fixed on the steel shell, is covered with a ceramic fiber blanket. A block-shaped ceramic fiber module of the required size, a packing material which is interposed in pressure contact between both sides of these ceramics and whose height is lower than the sides of the module, and which covers the surface of the module and has both ends folded between the modules. A furnace wall structure made of ceramic fibers is characterized in that it is composed of a plate-shaped ceramic fiber blanket whose folded ends are bonded to the packing material, and the second invention is a furnace wall structure made of ceramic fibers. A ceramic fiber module formed to the required size is fixed to a support member such as leather, and packing materials of a lower height are placed on both sides of this module, and then a flat ceramic fiber blanket is formed. One end is joined and aligned, the blanket is bent so as to cover the surface of the module, the other end is joined to a packing material placed on the other side of the module, and then the next packing material is attached. Place one end of the next blanket overlapping the other end of the blanket, fix the next module to the support member and cover it with the blanket, and attach the next packing on the other side of this module. This is a furnace wall construction method using ceramic fiber, which is characterized in that the furnace wall is constructed by sequentially constructing the ceramic fiber.

(Function) The surfaces of the ceramic fiber modules arranged and fixed on support members such as iron shells facing the inside of the furnace are covered with ceramic fiber blankets, and both ends of the blankets are inserted between the ceramic fiber modules. Since the module is covered with a new blanket, there will be no peeling of the module, and even if peeling occurs, cover only the surface of the peeled module with a new blanket, and insert both ends of the blanket between the adjacent module. The coating can be repaired by simply applying it, making partial repairs easier.

(Embodiment) The present invention will be described below with reference to the embodiment shown in FIGS. 1 to 5, and the same reference numerals are used for the same members as in FIG. 6.

FIG. 1 shows a front view of a part of the inner surface of the furnace of an embodiment of the furnace wall structure according to the present invention, and FIG. 2 shows a longitudinal side view of the same. In the figure, reference numeral 1 denotes a steel shell as a support member, and ceramic fiber modules 2, 2, . The modules 2, 2... are mounted at a constant interval between them through the ceramic fiber blankets 6, 6... (hereinafter simply referred to as blankets), and the surfaces of the modules 2, 2... facing the inside of the furnace are individually covered with ceramic fiber blankets 6, 6... (hereinafter simply referred to as blankets). ing.

In the illustrated embodiment, modules 2, 2...
are arranged in a staggered manner, and these modules 2, 2...
Packings 7, 7, . . . having a height of approximately 1/2 of the thickness of the module 2 are sandwiched between them, and the folded ends 6a, 6a at both ends of the blanket 6 are folded between the modules 2, 2 and held. In each row of modules 2 in the lateral direction, rows in which the width direction of the folded ends 6a are parallel to the arrangement direction of the modules 2 and rows in a direction perpendicular to the arrangement direction are alternated.

Figures 3 to 5 show an example of the method for constructing the furnace wall structure. In Figure 1, the modules 2A of stage A are arranged and fixed to the steel shell 1 with packing 7 interposed between them. A blanket 6 is placed over these modules 2A, and the folded ends 6a and 6b at both ends of the blanket 6 are held between the modules 2A.

Next, attach the packing 7 to the top side of the module 2A.
At the same time, one folded end 6a of the blanket 6 for the next stage B is placed on it (FIG. 3). Next, the module 2B of the next stage B is placed on top of these and attached to the steel shell 1 using the anchor hardware 3 (Fig. 4).

After that, attach the blanket 6 to the module 2B.
Bend it upward along the inner surface of the furnace, then bend the upper end toward the upper surface of the module 2B, and insert the packing 7 between that end and the steel shell 1 and press it down (Fig. 5). .

After completing the construction of that stage B as described above, module 2C of the next stage C is installed as shown by the chain line in Figure 5.
Arrange and fix in the same manner as above, and construct that stage C.

In addition, in the illustrated embodiment, module 2
Although a staggered arrangement has been described, this does not necessarily have to be an exact staggered arrangement, and it goes without saying that the direction in which the blankets 6 are folded may not be alternated for each stage, but may be in the same direction.

Since the present invention has the above configuration, module 2
Since the inner surface facing the inside of the furnace is covered with the blanket 6, overheating of the module 2 is prevented, and embrittlement of the surface of the module 2 due to recrystallization is prevented. Since the folded ends 6a, 6a at both ends of this blanket 6 are inserted between the modules 2, it will not peel off or fall off during use, and repair work with a new blanket 6 can be done by inserting the folded ends 6a, 6a at both ends. 6b can be inserted between the modules 2, making partial repairs easy.

〔Effect of the invention〕

As explained above, according to the furnace wall structure of the present invention, since the surface and side surfaces of the module facing the inside of the furnace are covered with a blanket,
The temperature on the surface of the module can be kept low, and since the folded ends of the blanket are inserted between the modules and held, it is difficult to peel off and fall off. This prevents corrosion and greatly extends the service life of the module. In addition, the presence of a packing material between the modules prevents the occurrence of cracks, and if only the blankets are made for high temperature resistance, it is possible to use modules for low temperatures, and partial repairs can also be done using the modules. It is simple because only the individual blankets need to be replaced, and has the advantage that no complicated means are required.

Furthermore, according to the construction method of the present invention, covering with a blanket can be done at the same time as the module is installed, and the work of inserting the blanket can be done easily.
The furnace wall structure can be constructed with high efficiency, and at the same time, the blanket can be installed quickly, and the folded ends at both ends of the blanket can be firmly inserted to prevent them from falling out, which prevents the blanket from peeling off. can be further prevented.

[Brief explanation of the drawing]

FIG. 1 is a partial front view showing an embodiment of the furnace wall structure according to the present invention, FIG. 2 is a vertical sectional side view of FIG. 1, and FIGS. 3 to 5 are explanatory diagrams showing the construction method according to the present invention. FIG. 6 is a longitudinal sectional view of a portion of a conventional furnace wall structure. 1... Iron shell as a support member, 2 (2A, 2
B, 2C)... Ceramic fiber module, 3... Anchor hardware, 6... Ceramic fiber blanket, 6a... Folded end, 7...
Patsukin.

Claims (1)

[Scope of Claims] 1. Block-shaped ceramic fiber modules of a required size that are arranged and fixed on an iron shell support member, and a block-shaped ceramic fiber module that is interposed in pressure contact between both side surfaces of these modules and that is lower in height than the side surfaces of the module. A ceramic fiber blanket comprising a packing material and a plate-shaped ceramic fiber blanket that covers the surface of a module and is attached by folding both ends between the modules and joining the folded ends to the packing material. Furnace wall structure made of fibers. 2. The width direction of the folded ends at both ends of the ceramic fiber bracket alternates between rows in a direction parallel to the arrangement direction of the modules and rows in a direction perpendicular to the arrangement direction. Furnace wall structure made of ceramic fibers. 3 Fix a ceramic fiber module formed to the required size to a support member such as an iron shell,
After aligning packing materials with a lower height on both sides of this module, one end of a flat ceramic fiber blanket was joined and aligned.
After bending this blanket so as to cover the surface of the module, the other end is joined to a packing material placed on the other side of the module, and then the next packing material is installed and one end of the next blanket is attached. The next module is placed so as to overlap the other end of the blanket, the next module is fixed to the support member and covered with the blanket, and the next packing material is installed on the other side of this module. A method for constructing a furnace wall using ceramic fibers. 4. The width direction of the folded ends at both ends of the ceramic fiber blanket is alternately arranged in rows in a direction parallel to the arrangement direction of the modules and rows in a direction perpendicular to the arrangement direction. A method for constructing a furnace wall using ceramic fibers as described in item 3.