JPH01134197A - Furnace wall structure by ceramic fiber and execution method thereof - Google Patents

Abstract

PURPOSE: To prolong the usable life of a module and facilitate repairing by providing ceramic fiber modules fixed with specified spacings and blankets covering their surfaces with their legs located within the spacings. CONSTITUTION: Ceramic fiber modules 2 of specified size are mounted on the inner surface of a shell 1 through anchor metals 3 with fixed intervals and covered with ceramic fiber blankets 6 over the inner furnace faces of the modules such that both ends of each blanket are inserted between the modules 2, thereby preventing the brittlement of the modules due to their surface recrystallization and stripping/dropping during use. This facilitates the repair work because of only inserting the bent ends 6a, 6b between the modules. Thus it is possible to raise the furnace wall construction efficiency and prolong the usable life of the modules.

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 in the steel, non-ferrous metal, petrochemical, ceramic, and other industries use furnace wall structures that are lined with ceramic fiber, which has excellent energy savings and thermal responsiveness.
In particular, with the advent of modular construction methods in which ceramic fibers are modularized and attached to steel shells, the scope of application to high-temperature furnaces has been expanded.

The biggest problem with the 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 the occurrence of this gap, various measures have been attempted that take into account the arrangement of modules, the method of compression, etc.

A construction method that has been widely adopted recently is the fiber-on-fiber construction method. As shown in a partial cross section in Fig. 6, this construction method involves installing ceramic fiber modules 2 (hereinafter simply referred to as modules) on a steel shell 1 using anchor hardware 3 and interposing packing 4 between the modules 2. The veneering module 5 is 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, ■ 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 prevents the generation of gaps between the modules 2. suppressed. ■There is only damage to the veneering module 5 on the inner surface of the furnace. (2) It becomes possible to use only the material of the veneer leg module 5 for high temperature use, and it can be constructed economically. ■Intrusion of hot gas is suppressed by the veneer lift module 5 and its fire-resistant adhesive. 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, the actual situation is that the veneering module 5 facing the inside of the furnace peels off. When the veneering module 5 peels off in this way, the module 2 is exposed in the furnace, and the mortar used as the adhesive initially used during repair is difficult to remove due to the embrittlement caused by the recrystallization of the surface of the module. Further, there is a problem in that recrystallization and powdering of the surface of the module 2 after removal makes it difficult to reinstall the veneering module 5.

In view of this, the present invention provides a furnace wall structure made of ceramic fibers that eliminates peeling and falling of the surface material facing the inside of the furnace and has good workability when repair is required, and constructs the furnace wall structure with high efficiency. We provide construction methods that allow
This is an attempt to solve the problems of the prior art.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention has a configuration in which the surface facing the furnace interior of the ceramic fiber modules arranged and fixed on the iron shell is coated with a ceramic fiber blanket. The first invention consists of a group of ceramic fiber modules of a required size that are fixed to a support member such as an iron shell at a predetermined distance from each other, and that covers the individual surfaces of these modules and covers both ends of the ceramic fiber modules. The second invention is characterized in that the ceramic fiber blanket is interposed and fixed in the space between the modules, and the second invention is characterized in that the support member such as the iron shell has a ceramic fiber blanket fixed to the support member such as the iron shell. After fixing the formed ceramic fiber module and aligning packing material with a lower height on both sides of the module, one end of the flat ceramic fiber blanket is joined and aligned, and this plunget is After bending so as to cover the surface of the module, the other end is joined to a packing material placed along the other side of the module, and then the next module is placed so as to press the end of the blanket and attached to the support member. It is characterized by fixing the furnace wall and then repeating this process to construct the furnace wall.

(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 a ceramic fiber blanket, and both ends of the blanket are inserted between the ceramic fiber modules so that they are sandwiched between the ceramic fiber modules. Therefore, the module will not peel off, and even if it does, the surface of only the peeled module will be covered with a new blanket, and both ends of the blanket will be inserted between the adjacent module. Covering can be repaired with just one step, making partial repairs easier.

(Example) Hereinafter, the present invention will be explained 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 indicates a steel shell as a support member, and ceramic fiber modules 2, 2 (hereinafter simply referred to as modules) formed in the shape of a rectangular parallelepiped of a required size on the inner surface of this steel shell 1 are anchor hardware 3. The surfaces of these modules 2.2... facing the inside of the furnace are covered by ceramic fiber blankets 6.6... (hereinafter simply referred to as blankets). Individually coated.

In the illustrated embodiment, modules 2.2... are arranged in a staggered manner, and between these modules 2.2... there is a packing 7. 7... are held between the modules 2, and the folded ends 6a, 6a at both ends of the blanket 6 are folded between the modules 2, 2. In each horizontal row of the module 2, the horizontal direction and the vertical direction are alternated.

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

Next, place the packing 7 on the upper surface side of the module 2A, and one folded end 6a of the blanket 6 for the next stage B.
(Figure 3). Next, the module 2B of the next stage B is placed on top of these and attached to the steel shell using the anchor hardware 3 (Fig. 4).

Thereafter, the blanket 6 is bent upward along the inner surface of the furnace of the module 2B, and the upper end is further bent toward the upper surface of the module 2B, and the packing 7 is inserted between the end and the steel shell 1. (Figure 5).

After finishing the construction of the stage B as described above, the modules 2C of the next stage C are arranged and fixed in the same manner as described above, as shown by the chain line in FIG. 5, and the construction of the stage C is started.

In the illustrated embodiment, the modules 2 are arranged in a staggered manner, but they may be arranged in a straight line, and the folding directions of the blankets 6 may not be alternated in each stage, but may be in the same direction. Of course it's a good thing.

Since the present invention has the above configuration, the inner surface of the module 2 facing the inside of the furnace is covered with the blanket 6, so that overheating of the module 2 is prevented and embrittlement due to recrystallization of the surface of the module 2 is prevented. 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.
Furthermore, repair work using a new blanket 6 can be done by simply inserting the folded ends 6a, 6a at both ends between the modules 2, so that partial repairs can be easily performed.

〔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 inside the furnace are covered with a blanket, the temperature of the surface of the module can be kept low, and the blanket covers the surface of the module. Since the folded ends at both ends are inserted and held between the modules, peeling and falling off is less likely to occur, which prevents the module surface from becoming brittle due to recrystallization, greatly extending the module's service life. Can be done. In addition, if only the blanket is made to be resistant to high temperatures, it becomes possible to use modules that are rated for low temperatures, and partial repairs are easy as only the blankets of each module need to be replaced, and there are advantages such as no need for complicated measures. be.

In addition, according to the construction method of the present invention, blanket covering can be performed at the same time as module installation, making it easy to insert the blanket, making it possible to construct the furnace wall structure with high efficiency, and at the same time constructing the blanket without any gaps. As a result, a strong insertion state is obtained so that the folded ends at both ends of the blanket do not come off, thereby further preventing the blanket from peeling off and falling off.

[Brief explanation of the drawing]

FIG. 1 is a partial front view showing one 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 skin as a support member, 2 (2A, 2B
. 2C) Ceramic fiber module, 3...
- Anchor hardware, 6... Ceramic fiber blanket, 6a... Folded end, 7... Packing. Applicant's agent Mr. Sato

Claims (1)

[Scope of Claims] 1. A group of ceramic fiber modules of a required size fixed to a support member such as an iron shell at a predetermined interval, and covering the individual surfaces of these modules, with both ends thereof A furnace wall structure made of ceramic fibers, characterized by comprising a ceramic fiber blanket interposed and fixed within a space between modules. 2. A furnace wall structure made of ceramic fibers according to claim 1, wherein the ceramic fiber modules are arranged in a staggered manner. 3. The furnace wall structure made of ceramic fibers according to claim 1, wherein the folding of both ends of the ceramic fiber blanket is alternated in the horizontal and vertical directions in each row of ceramic fiber modules. 4. A ceramic fiber module formed to the required size is fixed to a supporting member such as an iron shell, and after packing material of a lower height is placed on both sides of the module, a flat ceramic fiber blanket is formed. One end is joined and aligned, the blanket is bent to cover the surface of the module, the other end is joined to a packing material placed along the other side of the module, and then the next module is attached to the blanket. A method for constructing a furnace wall using ceramic fibers, the method comprising: placing the ends of the ceramic fibers so as to hold them down and fixing them to a support member, and then repeating this process to construct the furnace wall. 5. The furnace wall construction method using ceramitter fibers according to claim 4, wherein the ceramic fiber modules are arranged in a staggered manner. 6. The furnace wall construction method using ceramic fibers according to claim 4, wherein the folding directions of both ends of the ceramic fiber blanket are alternated in the horizontal and vertical directions in each row of ceramic fiber modules.