JP2000055568A - Structure of furnace wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a superior thermal insulation and a superior temperature keeping state to be attained and further enable a superior strength and a superior durability to be kept without increasing a thickness of a furnace wall. SOLUTION: A second furnace wall member 2 formed into a flat plate by refractory material opposing against extremity ends 4b of protrusions 4 is laminated on a first furnace wall 1 having a plurality of column-like protrusions 4 integrally formed at one plate surface of a base section 3 formed into a flat plate by refractory material so as to form a space 5 with some protrusions 4 being placed between the first furnace wall 1 and the second furnace wall 2. With such an arrangement as above, a heat conduction is reduced by the space 5 and an expansion or shrinkage is adapted by a strain of the protrusions 4 even if the expansion or shrinkage caused by a variation in temperature is produced at the plate portion. Accordingly, even if the furnace wall is thin, it may have a superior heat insulating characteristic and a temperature keeping characteristic and also it may keep a superior strength and a superior durability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for firing, baking, incineration, melting, and the like, by storing a fire or the like in the inside.
The present invention relates to a structure of a furnace wall which is applied to a furnace for heating or the like and forms an outer wall of the furnace.

[0002]

2. Description of the Related Art A furnace wall forms the outer wall of a furnace, and one of its purposes is to confine heat in the furnace to a high temperature. In this way, heat insulation and heat retention are performed appropriately,
The purpose is to prevent loss of heat energy and to perform firing, baking, incineration, melting, heating, etc. with a small amount of heat energy in a short time.

Heretofore, this kind of furnace wall structure has been intended to obtain a heat insulating and heat retaining effect by increasing its thickness.

[0004]

However, in the above-described conventional furnace wall structure, the thickness naturally increases in order to enhance the heat insulation and heat retention. in this case,
A remarkable temperature difference occurs between the inner surface of the furnace wall that receives heat and the outer surface, and the inner surface of the furnace wall becomes hot and expands, and the outer surface does not expand. When the temperature in the furnace decreases, the furnace wall shrinks, and the shrinkage is large on the inner surface of the furnace wall and small on the outer surface. For this reason, the expansion and contraction are different between the inner surface and the outer surface of the furnace wall, and if the thickness of the furnace wall is increased as described above, the difference becomes larger, and the furnace wall is deteriorated and cracks are generated. There was a problem.

[0005] Further, increasing the thickness of the furnace wall increases the size of the furnace, so that the furnace cannot be installed in a limited site.

[0006] From such a problem, it is conceivable that the furnace wall is formed by using a material having a small thickness and having heat insulating and heat retaining properties. However, since this kind of material is expensive, the cost increases. Low feasibility.

[0007] In order to solve the above-mentioned problems, the present invention provides a furnace having excellent heat insulation and heat retention without increasing the thickness of a furnace wall, and capable of maintaining excellent strength and durability. It aims to provide a wall structure.

[0008]

In order to achieve the above object, the structure of the furnace wall according to the present invention is a plate made of a refractory material and has a plurality of projections integrally formed on one plate surface. And a second furnace wall formed of a refractory material in a plate shape, wherein the second furnace wall faces the tip of the protrusion in the first furnace wall. The body is laminated, and a space is provided between the first furnace wall and the second furnace wall via the protrusion.

Further, the structure of the furnace wall according to the present invention comprises a third furnace wall formed of a refractory material into a plate shape and integrally having a plurality of projections on both plate surfaces, and a plate made of the refractory material. A second furnace wall body formed in a shape, and the second furnace wall bodies are respectively laminated so as to face a tip portion of the projection in the second furnace wall body, A space is provided between the furnace wall and the third furnace wall via the projection.

[0010] Then, by the various lamination combinations of the first furnace wall body, the second furnace wall body, and the third furnace wall body, a space interposed between the respective furnace wall bodies via the protruding portion is multi-layered. It is characterized in that it is formed as described above.

Further, each of the projections has a total area of a base end projecting from the plate surface of the first or third furnace wall body.
It is formed so as to occupy about 20 to 70% of the entire area of the plate surface and to have a height of about 1.5 times or less the thickness of the first or third furnace wall. preferable.

Further, the projection may be formed in a columnar shape, and the peripheral surface may be formed so as to be inclined or curved so that the distal end has a smaller diameter or is sharper than the base end.

Further, the projection may be formed in a mountain shape so as to protrude from the plate surface of the first or third furnace wall.

It is preferable that the projection is formed in a cylindrical shape that does not penetrate the thickness of the first or third furnace wall.

The projection is formed separately from the plate-like portion, and is attached to a plate surface of the first furnace wall or the third furnace wall with a fire-resistant adhesive. It is characterized by:

[0016]

Embodiments of the present invention will be specifically described below with reference to the drawings. The structure of the furnace wall according to the present invention constitutes the outer wall of the furnace, and by confining the heat in the furnace to a high temperature, heat insulation and heat retention are appropriately performed, loss of heat energy is prevented, and heat energy is reduced. Baking, baking, incineration, melting, heating, etc. FIG. 1 is an exploded perspective view showing the structure of a furnace wall according to the present invention, and FIG. 2 is a sectional view of the structure of the furnace wall.

As shown in FIGS. 1 and 2, the structure of the furnace wall of this embodiment includes a first furnace wall 1 and a second furnace wall 2.

The first furnace wall 1 has a plurality of columnar projections 4 integrally formed on one plate surface of a base 3 formed of a refractory material into a flat plate shape. The refractory material constituting the first furnace wall 1 is a non-flammable material that changes its quality only on the outer surface even when it is exposed to fire, such as a refractory metal (tungsten, tantalum, molybdenum, etc.), There are cement (alumina cement and the like), refractory clay (silica, alumina and water as main components), and ceramic fiber (alumina fiber and the like). Also, the first furnace wall 1
There are two types of molding: a pressing type in which the above-mentioned refractory material is put into an engraving mold to apply pressure, and a suction type in which the above-mentioned refractory material is put into a frame and vacuuming unnecessary portions.

Each projection 4 is formed in a columnar shape such as a cylinder or a prism shown in FIG. 1, and the total area of the base end 4a is about 20 to 70% of the total area of the plate surface of the base 3. (Preferably 30%). Also, each protrusion 4
The height is formed to be approximately 1.5 times or less the thickness of the base 3.

The second furnace wall 2, like the base 3 of the first furnace wall 1, is formed of a refractory material into a flat plate shape.

Then, as shown in FIG. 2, the first furnace wall 1 is laminated on the tip 4b of the projection 4 so that the plate surface of the second furnace wall 2 faces the first furnace wall 1. A space 5 is formed between the furnace wall 1 and the second furnace wall 2 via the height of the protrusion 4. The space 5 communicates with an interval between the projections 4. Further, the laminated first furnace wall 1 and second furnace wall 2 are bonded with a fire-resistant adhesive or fixed with a fire-resistant fastener (bolt or the like).

When a furnace is constituted by such a furnace wall,
The first furnace wall 1 is inside the furnace, and the second furnace wall 2 is outside the furnace. That is, heat is applied from the side of the base 3 of the first furnace wall 1 as indicated by an arrow in FIG.

When heat is applied to the base 3 side of the first furnace wall 1, this heat is conducted to the space 5 side by lowering the temperature through the base 3 to some extent. Since the heat transmitted to the space 5 passes through the air, the conduction of the temperature is significantly reduced. Therefore, by stacking the first furnace wall 1 and the second furnace wall 2,
Excellent heat insulation and heat retention will be obtained.

Further, since the space 5 is communicated with an interval between the projections 4, even if there is a partial temperature difference in the heat applied to the base 3, the heat is made uniform in the communicated space 5. In addition, the temperature inside the furnace can be equalized, and the temperature of heat conducted outward can also be equalized.

Further, since there is a space 5 communicating between the first furnace wall 1 and the second furnace wall 2, the air in this space 5 is drawn by the pressure of the exhaust flow. An eject action can be caused, and the temperature in the furnace can be stably increased.

On the other hand, when heat is applied to the base 3 side of the first furnace wall 1, the base 3 undergoes thermal expansion. On this occasion,
Since the protrusion 4 is distorted by the expansion of the base 3, even if the base 3 expands and deforms, there is no effect on the second furnace wall 2 side. Further, even when the base 3 of the first furnace wall 1 contracts, the contraction of the base 3 does not affect the second furnace wall 2 due to the distortion of the projection 4. Therefore, by laminating the first furnace wall 1 and the second furnace wall 2, excellent strength is obtained.

The lamination of the first furnace wall 1 and the second furnace wall 2 described above may be configured as a multilayer as shown in FIG. In this case, the conduction of the temperature can be reduced synergistically by the multilayer space 5 formed by each protrusion 4. Further, according to the multilayer structure, the expansion and contraction occurring in the first furnace wall 1 can be synergistically passed through each of the projections 4.

The thickness of the base 3 of the first furnace wall 1 is as follows:
Since the space 5 defined by the projections 4 provides excellent heat insulation and heat retention, it does not need to be formed thick. Rather, base 3
Is preferably thinner so that there is no difference in expansion and contraction between the surface to which heat is applied and the surface forming the projections 4. therefore,
The overall thickness of the laminated structure does not increase.

Here, as shown in FIGS. 4 (a) and 4 (b), as compared with the structure of the furnace wall of the present invention and the conventional structure, the same single refractory member is used to form the structure of the conventional single plate. The thickness of the furnace wall 101 (FIG. 4A) and the structure of the furnace wall of the present invention (FIG. 4A)
It is assumed that the thickness of (b) is the same. In such a case, when heat is applied from one surface (the left side in the drawing) of the conventional furnace wall 101, heat conduction occurs toward the other surface (the right side in the drawing) as indicated by a line h in the drawing. On the other hand, in the structure of the furnace wall of the present invention, the conduction of heat at the base 3 is the same as in the prior art as indicated by the line H in the drawing, but the conduction of heat applied to the space 5 is significantly reduced. Then, compared to the conventional heat conduction indicated by the dotted line h, a difference P occurs in the conduction heat on the other surface.

As described above, according to the structure of the furnace wall of the present invention, even if it has the same thickness as the conventional one, it is possible to remarkably reduce the heat conduction and to use the refractory material used for the space 5. It becomes possible to reduce. Further, when a furnace wall having the same heat conduction as that of the related art is obtained by the configuration of the present invention, it is needless to say that the thickness can be made smaller than that of the related art.

The above-mentioned projections 4 in the first furnace wall 1 are columnar. However, the configuration shown in FIGS. 5 to 8 can enhance the above-mentioned effects. As shown in FIGS. 5A and 5B, the shape of the projection 4 is formed so that the peripheral surface thereof is inclined with respect to the base 4a such that the distal end 4b has a smaller diameter. Alternatively, FIG.
As shown in (a) and (b), the shape of the protrusion 4 is formed so that the peripheral surface thereof is inclined so that the tip 4b is sharp. Alternatively, as shown in FIGS. 7 (a) and 7 (b), the shape of the projection 4 is formed by curving the peripheral surface of the base 4a such that the distal end 4b has a small diameter or sharpness.

By changing the shape of the projection 4 in this manner, the tip 4b of the projection 4 that contacts the plate surface of the second furnace wall 2 has a smaller area than the base end 4a. Since heat conduction from the first furnace wall 1 to the second furnace wall 2 via the portion 4 is reduced, it is possible to further improve heat insulation and heat retention.

Further, since the peripheral surface of the projection 4 is formed to be inclined or curved, the base 3 of the first furnace wall 1 is formed.
It is possible to increase the strength of the projections 4 against distortion when is expanded and contracted.

When the tip 4b of the projection 4 is formed to be sharp, when the furnace wall is constructed as shown in FIG. 2 or 3, the tip 4b of the projection 4 is placed on the side receiving heat. It is good to turn. According to this, since the contact area of the protrusion 4 to the side where heat is conducted is small, heat conduction can be significantly reduced, and the heat insulation and heat retention effects can be further improved.

As shown in FIGS. 8A and 8B,
The projection 4 is formed in a hollow shape that opens toward the tip 4 b, and is formed in a cylindrical shape that does not penetrate the base 3 of the first furnace wall 1.
Thereby, since an internal space 4c different from the above-mentioned space 5 is formed in the protrusion 4, heat conduction can be further reduced by the internal space 4c. Further, the cylindrical shape makes it possible to increase the strength of the projection 4 against distortion when the base 3 of the first furnace wall 1 expands and contracts.

The cylindrical structure of the protrusion 4 can be configured in addition to the shape of the protrusion 4 shown in FIGS.

Although not shown, the projection 4 may be formed in a mountain shape so as to protrude from the plate surface of the first furnace wall 1. According to this, it is possible to easily form the protrusion 4. Also, the mountain-shaped projection 4 may have a cylindrical configuration.

Here, a modified example of the first furnace wall 1 described above will be described with reference to FIG. Third furnace wall 10 shown in FIG.
Has a base 3 formed of a refractory material into a flat plate shape, like the first furnace wall 1. A plurality of columnar projections 4 are integrally formed on both plate surfaces of the base 3.

The space 5 is formed on both sides of the third furnace wall 10 by laminating the third furnace wall 10 so as to sandwich the third furnace wall 10 therebetween. .

Even when the third furnace wall 10 configured as described above is employed, the space 5 and the projections 4 can provide excellent heat insulation and heat retention and excellent strength. is there.

The projections 4 on the third furnace wall 10
Can be used for the configuration described with reference to FIGS.

Further, the first furnace wall 1, the second furnace wall 2, and the third furnace wall 10 may be variously laminated and combined.

In the above-described embodiment, the first furnace wall 1 and the third furnace wall 10 are provided with several rows (five rows in the drawing) of projections 4 on the flat base 3. The second furnace wall 2 has a flat plate configuration corresponding to the size of the base 3 of the first furnace wall 1 and the third furnace wall 10. That is, the first furnace wall 1, the second furnace wall 2, and the third furnace wall 10 are formed in a panel shape, and a furnace wall is configured by connecting a plurality of the panel shapes. Further, the first furnace wall 1, the second furnace wall 2, and the third furnace wall 10 are not limited to the panel shape, and as shown in FIG. The furnace wall 10 is formed in a block shape having several (for example, two) projections 4 on the base 3, and the second furnace wall 2 is formed by the first furnace wall 1 and the third furnace wall. The furnace wall may be formed by forming a block shape corresponding to 10 and connecting a plurality of the block shapes. Thus, according to the panel-shaped or block-shaped configuration, it is possible to easily obtain furnaces of various sizes and shapes by the furnace wall having the above-described effects. When the first furnace wall 1, the second furnace wall 2, and the third furnace wall 10 are configured in a block shape, FIG.
As shown in (1), the strength of the furnace wall can be increased by shifting and combining the second furnace wall body 2 with the seam of the first furnace wall body 1 (third furnace wall body 10).

Further, in the above-described embodiment, a multilayer furnace wall can be formed by using the first furnace wall 1, the second furnace wall 2, and the third furnace wall 10, so that different refractory materials are used. Can be constituted by combining the furnace wall bodies. In this case, the properties of the refractory material (expansion and shrinkage, fire resistance, etc.)
Depending on the purpose of use, it is not necessary to specify the order inside and outside the furnace wall, but depending on the purpose of use, for example, use a furnace wall of an expensive refractory material having a small expansion and contraction rate inside the furnace, If a furnace wall made of an inexpensive refractory material is adopted, an inexpensive furnace wall having excellent performance can be obtained.

In the above-described embodiment, the base 3 of the first furnace wall 1, the second furnace wall 2, and the third furnace wall 1
Although the 0 base 3 is illustrated and described as a flat plate, these are not limited to the flat plate shape, and may be a curved or bent plate shape. As described above, if there is a curved or bent configuration, a furnace of any shape can be obtained by various combinations including a flat configuration.

Further, in the above-described embodiment, it has been described that the protrusion 4 on the first furnace wall 1 or the third furnace wall 10 is formed integrally with the base 3. Alternatively, the projection 4 and the base 3 may be formed separately, and the projection 4 may be attached to the base 3 with a fire-resistant adhesive. in this way,
When the protrusion 4 formed separately is attached to the base 3 with a fire-resistant adhesive, heat is applied to the base 3 and the base 3 is heated.
When thermal expansion occurs, the protrusions 4 slightly move between the refractory adhesives, and can dissipate the expansion deformation occurring in the base 3. Further, even when the base portion 3 contracts, the contraction deformation can be similarly carried away, so that more excellent strength is obtained.

The projection 4 in the above-described embodiment has a projection protruding from the plate surface of the base 3 in the illustrated or described shape. However, as shown in FIG. May be formed intermittently along the line, and even with this configuration, the same effect as described above can be obtained. The configuration of this ridge may be either integral with or separate from the base 3 as described above. The cross-sectional shape of the ridge is similar to the shape shown in FIGS.
Alternatively, it may have a mountain-like shape, or may have a cylindrical configuration as shown in FIG.

Further, in all of the above-described embodiments, a thin leaf-shaped radiant heat reflecting member (not shown) may be provided in the space 5 so as to be sandwiched by the protrusions 4. It is made of a low-conductivity and fire-resistant metal material (for example, aluminum alloy). If this radiant heat reflecting member is provided, it is possible to further reduce the heat conduction, and to reflect the radiant heat when the inside of the furnace is incandescent, thereby obtaining an even greater heat insulating effect. In addition, it is preferable to arrange the radiant heat reflecting member on the side receiving the heat in the space 5 from the viewpoint of obtaining the heat insulating and heat retaining effect.

[0049]

As described above, the structure of the furnace wall according to the present invention is a first furnace wall formed of a refractory material in a plate shape and having a plurality of columnar projections integrally on one plate surface. A body is laminated with a second furnace wall formed of a refractory material in a plate shape so as to face the tip of the protrusion, and between the first furnace wall and the second furnace wall. By forming a space via the protrusion, heat conduction is reduced by the space, and even if expansion and contraction occurs in the plate-shaped portion, the expansion and contraction is dissipated by distortion of the protrusion. Therefore, even if the furnace wall is thin, it has excellent heat insulation and heat retention, and can maintain excellent strength and durability.

Further, since the space is composed of a plurality of columnar projections and communicates with each other through the space between the projections, even if a part of the furnace wall becomes high temperature, heat is uniformly distributed by the communicating space. Therefore, the temperature inside the furnace can be equalized, and the conducted heat can be equalized.

Further, the communicating space has an ejecting action of pulling out the air in this space by the pressure of the exhaust flow,
The temperature in the furnace can be stably increased.

Further, since the plate-shaped portion is allowed to expand and contract, it is possible to use an inexpensive refractory material which is liable to expand and contract, and to provide a space inside the furnace wall so that the plate can be expanded and contracted. Since the amount of the heat-resistant material used for the apparent thickness can be reduced, the cost of the furnace wall can be reduced.

Further, it is formed in a plate shape by a refractory material,
Using a third furnace wall having a plurality of columnar projections integrally on both plate surfaces thereof, the second furnace wall is arranged so as to face the tip of the projection in the second furnace wall. Laminate each,
The same effect can be obtained even with a configuration in which a space is formed between the second furnace wall body and the third furnace wall body via a projection.

When various stacking combinations of the first furnace wall, the second furnace wall, and the third furnace wall are performed, a space between the furnace walls via a projection is formed in a multilayer. Can be formed. In this case, a refractory material having different properties (expansion / shrinkage rate, fire resistance performance, etc.) can be adopted for each layer to form a furnace wall suitable for the purpose.

Each of the protrusions has a total area of the base end portion occupying about 20 to 50% of the entire area of the plate surface, and a height of the protrusion is approximately 1.10 of a thickness of the plate portion. It is preferable that it is formed so as to be 5 times or less, and by adopting this configuration, the above effects can be obtained as appropriate.

It is preferable that the projection is formed so that the peripheral surface thereof is inclined or curved so that the distal end is smaller in diameter or sharper than the base end. The strength can be improved, and the strength of the furnace wall can be increased.

Further, if the projection is formed in a cylindrical shape that does not penetrate the thickness of the first or third furnace wall, the strength can be further improved.

Further, the projection is formed separately from the plate-like portion of the first or third furnace wall, and a fire-resistant adhesive is attached to the plate surface of the first or third furnace wall. By mounting with, even if the plate-shaped part undergoes expansion deformation or contraction deformation, the protrusion moves slightly between the fire-resistant adhesive,
The deformation of the plate-shaped portion can be carried away, and further excellent strength can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the structure of a furnace wall according to the present invention.

FIG. 2 is a sectional view of the structure of the furnace wall.

FIG. 3 is a sectional view showing a state where the furnace wall has a multilayer structure.

FIGS. 4 (a) and 4 (b) are comparative views of the structure of the furnace wall of the present invention and a conventional structure.

5A and 5B are a perspective view and a cross-sectional view showing another shape of the projection.

6A and 6B are a perspective view and a cross-sectional view showing another shape of the projection.

FIGS. 7A and 7B are a perspective view and a cross-sectional view showing another shape of the projection.

8A and 8B are a perspective view and a cross-sectional view showing another shape of the projection.

FIG. 9 is a sectional view showing a modification of the structure of the furnace wall according to the present invention.

FIG. 10 is a perspective view showing an example of a usage form of a furnace wall structure according to the present invention.

FIG. 11 is a perspective view showing another structure of the protrusion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... First furnace wall, 2 ... Second furnace wall, 3 ... Base, 4 ...
Projection, 4a: Base end, 4b: Tip, 4c: Internal space, 5: Space, 10: Third furnace wall.

Claims (8)

[Claims] 1. A first furnace wall formed of a refractory material in a plate shape and integrally having a plurality of projections on one plate surface, and a second furnace formed of a refractory material in a plate shape A wall body, wherein the second furnace wall body is laminated so as to face a tip end of the projection in the first furnace wall body, and the first furnace wall body and the second furnace wall are stacked. A structure of a furnace wall, wherein a space is provided between the body and the body via the protrusion. 2. A third furnace wall formed of a refractory material in a plate shape and integrally having a plurality of projections on both plate surfaces thereof, and a second furnace formed of a refractory material in a plate shape. A wall body, and the second furnace wall bodies are respectively laminated so as to face a tip portion of the projection in the second furnace wall body, and the second furnace wall body and the third furnace are stacked. A structure of a furnace wall, wherein a space is formed between the wall and the wall through the protrusion. 3. A multi-layered space between the furnace walls through the protrusions by various lamination combinations of the first furnace wall, the second furnace wall, and the third furnace wall. The structure of the furnace wall according to claim 1 or 2, wherein the furnace wall is formed as described above. 4. A total area of a base end of each of the projecting portions projecting from a plate surface of the first or third furnace wall body occupies about 20 to 70% of an entire area of the plate surface. , Whose height is substantially equal to the thickness of the first or third furnace wall body.
The structure of the furnace wall according to any one of claims 1 to 3, wherein the structure is formed so as to be 5 times or less. 5. The projection according to claim 1, wherein the projection is formed in a column shape, and a peripheral surface thereof is formed so as to be inclined or curved so that a distal end thereof has a smaller diameter or is sharper than a base end. The structure of the furnace wall according to any one of claims 1 to 4. 6. The method according to claim 1, wherein the protrusion is formed in a mountain shape so as to protrude from a plate surface of the first or third furnace wall. The furnace wall structure as described. 7. The method according to claim 1, wherein the projection is formed in a cylindrical shape that does not penetrate the thickness of the first or third furnace wall. Furnace wall structure. 8. The projecting portion is formed separately from the plate-shaped portion, and is attached to a plate surface of the first furnace wall or the third furnace wall with a fire-resistant adhesive. The furnace wall structure according to any one of claims 1 to 7, characterized in that: