JP3197498B2 - Ceramic fiber module for high temperature - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high temperature ceramic fiber module which is a lining material for refractory and heat insulation installed inside an industrial furnace.

[0002]

2. Description of the Related Art As a lining material for refractory and heat insulation installed to protect the inside of various industrial furnaces such as steelmaking plants and chemical plants from high temperatures, in addition to irregular refractories and refractory bricks, heat-resistant materials such as ceramic fibers. Ceramic fiber modules made of inorganic fibers are used.

A lining made of a ceramic fiber module has an extremely light weight and a small amount of heat storage as compared with a refractory brick or the like, but has a very low thermal conductivity and a remarkably excellent heat insulating performance. Therefore, the amount of heat stored in the lining is small, the thermal inertia is low, fine temperature control is easy, the amount of heat released outside the furnace is extremely small, and the energy consumption can be greatly improved. In addition, the ceramic fiber module is lightweight, easy to handle, and easy to construct. On the other hand, ceramic fiber modules are more expensive than irregular refractories or refractory bricks.In particular, the higher the temperature, the more heat-resistant ceramic fibers must be used, and their use is subject to cost constraints. I have.

For this reason, in the lining of an industrial furnace using a conventional ceramic fiber module, a low-temperature ceramic fiber such as silica-alumina fiber is used on the low-temperature furnace wall side, and an alumina fiber Some methods have been proposed, such as a structure in which two types of ceramic fiber materials are bonded with an adhesive using a high-temperature ceramic fiber such as that described in Japanese Utility Model Publication No. 63-40786 and Japanese Utility Model Publication No. 61-46396. . With such a structure, the amount of expensive high-temperature ceramic fibers used can be reduced, but problems such as insufficient reduction and peeling of the joints with the adhesive remain.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-temperature ceramic fiber module that can be easily processed while further reducing the amount of expensive high-temperature ceramic fiber used.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a high-temperature ceramic fiber blanket and a low-temperature ceramic fiber blanket are folded into a plurality of stages to form a high-temperature laminate and a low-temperature laminate, respectively. High temperature ceramic fiber module
In the valley of the high-temperature laminate, the peak of the low-temperature laminate is arranged to fit, and in the valley of the low-temperature laminate, a low-temperature ceramic fiber blanket that reaches the peak of the high-temperature laminate. Are arranged so that the cores fit together, and are hot
Laminate, low temperature laminate and core are heat resistant in the lamination direction
A high-temperature ceramic fiber module characterized in that the module is fastened with a conductive fastening material .

The present invention also provides a high temperature ceramic fiber blanket which is obtained by folding a high temperature ceramic fiber blanket and a low temperature ceramic fiber blanket into a plurality of stages to form a high temperature laminate and a low temperature laminate, respectively, and integrally combining these. In the fiber module, the peaks of the low-temperature laminate are alternately projected, and the projected peaks are arranged so as to fit into the valleys of the high-temperature laminate , and the high-temperature laminate is disposed.
Body and low-temperature laminate are fastened with heat-resistant fastening material in the lamination direction.
It is a high temperature ceramic fiber module characterized by being tied .

[0008] Then, it is preferable that a metal fitting for attaching to the furnace wall is attached to the opposite surface of the low-temperature laminate to form a module. The ceramic fiber blanket for high temperature and the ceramic fiber blanket for low temperature are relative. The former is a ceramic fiber having a heat resistant temperature of 1100 ° C. or more, preferably 1200 ° C. or more, and the latter is a heat resistant temperature of 1100 ° C. C or less ceramic fiber. In the present invention, the peaks and the valleys are based on the surface where the high-temperature laminate and the low-temperature laminate are in contact, unless otherwise specified.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing an example of a high-temperature ceramic fiber module of the present invention. In FIG. 1, 1 is a high-temperature laminate, 2 is a low-temperature laminate, and 3 is a core. A heat-resistant fastening material 4 such as a ceramic fiber string is fastened in the stacking direction and integrated. A channel 5 serving as a mounting bracket is attached to the surface of the low-temperature laminate opposite to the surface in contact with the high-temperature laminate. This channel 5 is fixed to the low-temperature laminate through at least two beams 6 and legs (not shown) arranged inside the folds of the low-temperature laminate, and the whole is integrated to form a module. . The module is then mounted via a furnace wall having a mounting member (not shown) engaging the channel 5.

FIG. 2 is a partially cutaway perspective view showing another example, in which 1 is a high temperature laminate, 2 is a low temperature laminate, and these are heat-resistant laminates such as ceramic fiber strings. It is fastened in the laminating direction with the flexible fastening material 4 and is integrated. A channel 5 serving as a mounting bracket is attached to the surface of the low-temperature laminate opposite to the surface in contact with the high-temperature laminate. This channel 5 is fixed to the low-temperature laminate through at least two beams 6 and legs (not shown) arranged inside the folds of the low-temperature laminate, and the whole is integrated to form a module. . The module is then mounted via a furnace wall having a mounting member (not shown) engaging the channel 5.

In FIG. 1, a high-temperature laminate 1 is obtained by folding a high-temperature ceramic fiber blanket into a plurality of steps so that the whole has substantially the same width (thickness direction). The low-temperature laminate 2 is obtained by folding a low-temperature ceramic fiber blanket into a plurality of steps so that the entire width is substantially the same and the width (thickness direction) is wider than the folding width of the high-temperature ceramic fiber blanket. . Then, when the peaks of the low-temperature laminate 2 are alternately fitted to the valleys of the high-temperature laminate 1 by spreading both laminates in the laminating direction, the folded portion of the low-temperature laminate 2 becomes Voids are created. In FIG. 1, the void is filled with a core 3 to eliminate the void. That is, the core 3 is a low-temperature ceramic fiber blanket member that is filled in a hollow portion formed by the valley of the low-temperature laminate 2 and the peak of the high-temperature laminate 1.

With this configuration, the core 3 fits into the valley of the low-temperature laminate 2 and the valley of the high-temperature laminate 1 and the ridge of the low-temperature laminate 2 fit together. May simply fall off and fall off during use. In the present invention, the high-temperature laminate 1 and the low-temperature laminate 2 are fastened in the laminating direction with the heat-resistant fastening material 4,
It integrates without using an adhesive. Furthermore, in order to fasten securely, it is preferable to fasten the low temperature laminate 2 and the core 3 in the laminating direction with the heat resistant fastening material 4. Examples of the heat-resistant fastening material 4 include a ceramic rod, a heat-resistant metal rod, a long fiber alumina fiber string, and the like, and a long fiber alumina fiber string is preferable.

As the high-temperature ceramic fiber used for the high-temperature laminate 1, a high-heat-resistant ceramic fiber mainly composed of alumina, for example, an alumina fiber is preferable. The high temperature ceramic fiber blanket needled is folded to produce a high temperature laminate 1 having the shape shown in FIG. By reducing the overlapping portion of the high-temperature laminate 1 as much as possible, it is possible to reduce the amount of expensive high-temperature ceramic fibers used. The high temperature laminate 1 can be easily manufactured by folding while sandwiching a core material having the same shape as the fitting shape of the low temperature laminate 2.

The low-temperature ceramic fibers used in the low-temperature laminate 2 include, for example, silica-alumina fibers, silica-alumina-zirconia fibers, and silica-alumina-chromia fibers. Inexpensive silica-alumina fibers may be used. The low temperature ceramic fiber blanket needled is folded to produce a low temperature laminate 2 having the shape shown in FIG. The length of the superposed portion of the low-temperature laminate 2 may be substantially equal to a value obtained by subtracting the layer thickness of the high-temperature laminate 1 from the design value of the high-temperature module of the present invention. The low-temperature laminate 2 can be easily manufactured by folding while sandwiching a core having the same shape as the folded portion.

The ceramic fiber used for the core 3 may be the same as the low-temperature ceramic fiber used for the low-temperature laminate 2, but may be somewhat lower in heat resistance. As shown in FIG. 1, the core 3 is preferably one obtained by folding a ceramic fiber blanket into two layers.

FIG. 2 shows that instead of using the core 3, the ridges of the low-temperature laminate 2 are folded so as to alternately protrude by a width corresponding to the depth of the valley of the high-temperature laminate 1. The protruding peaks are arranged so as to alternately fit into the valleys of the high temperature laminate 1. Therefore, although the folding step becomes somewhat complicated, the step of filling the core 3 can be omitted. Others can be manufactured similarly to the high temperature ceramic fiber module shown in FIG.

In the ceramic fiber module for high temperature of the present invention, a plurality of beams 6 are mounted inside the folds of the low temperature laminate 2, and then the peaks and valleys of the low temperature laminate 2 and the high temperature laminate 1 alternate. Then, if necessary, the core 3 is pushed in, and the manufactured block is skewered or sewn and fastened with the heat-resistant fastening material 4, and finally the channel 5 is beaded.
By attaching it via a leg that connects to
Can be manufactured.

The mounting of the high-temperature ceramic fiber module of the present invention only requires sliding the channel 7 into engagement with the receiving member provided on the furnace wall.

[0019]

According to the ceramic fiber module fiber for high temperature of the present invention, the ceramic fiber for low temperature can be used in the place where the conventional high temperature ceramic fiber is used, so that the material cost is greatly reduced. . In addition, all of this production can be performed in a factory, and the number of on-site constructions in the furnace can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional perspective view showing an example of a high-temperature ceramic fiber module of the present invention.

FIG. 2 is a partial cross-sectional perspective view showing another example of the high-temperature ceramic fiber module of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature laminated body 2 Low temperature laminated body 3 Core 4 Heat resistant fastening material 5 Channel 6 Beam

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Junatsu Nakamura 8-26-7 Nisato, Munakata-shi, Fukuoka (72) Inventor Katsuhiko Matsuoka 2-7-8, Kimigaoka, Hashimoto-shi, Wakayama (72) Inventor Next Hidehide Yama, 5-1-8 Minami-Okubo, Kumatori-cho, Sennan-gun, Osaka Pref. Yoshihisa Chief Examiner (56) References Japanese Utility Model Publication Sho 62-52893 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) ) F27D 1/00-1/16 C04B 38/00 303

Claims (2)

(57) [Claims] 1. A high-temperature ceramic fiber module comprising a high-temperature ceramic fiber blanket and a low-temperature ceramic fiber blanket, each of which is folded in a plurality of stages to form a high-temperature laminate and a low-temperature laminate. In the valley of the high-temperature laminate, the peak of the low-temperature laminate is arranged to fit, and in the valley of the low-temperature laminate, a low-temperature ceramic fiber blanket that reaches the peak of the high-temperature laminate. The cores are arranged so that they fit together, and the laminate for high temperature and the laminate for low temperature
The body and the core are fastened with heat-resistant fastening material in the stacking direction.
Ceramic fiber module for high temperature, characterized by comprising. 2. A high-temperature ceramic fiber module obtained by folding a high-temperature ceramic fiber blanket and a low-temperature ceramic fiber blanket into a plurality of stages to form a high-temperature laminate and a low-temperature laminate, and integrally connecting these. The peaks of the low temperature laminate are alternately projected, and the projected peaks are arranged so as to fit into the valleys of the high temperature laminate , and the high temperature laminate and the low temperature laminate are arranged .
The high-temperature ceramic fiber module, wherein the laminate is fastened in the stacking direction with a heat-resistant fastening material .