JPH02120239A - Refractory material for heat storage chamber - Google Patents

Abstract

PURPOSE:To promote heat transfer of a refractory material and air and prevent deposition of floating material to wall surface of gas flow path by piling the refractory material for heat storage chamber up around the gas flow path in a specific manner and providing a projection part having longer height in ring shape. CONSTITUTION:The aimed refractory material 10 is nearly octagonal in outline in the upper face 8 and lower face 9 and cylindrical as the whole and has two openings at upper and lower faces. A space connecting two openings forms a gas flow path 2. A dry masonry structure opened in vertical direction and having long and narrow, many and mutually parallel gas flow paths 2 and 3 can be formed by vertically and laterally pilling up the refractory material 10. A longer projection part 4 is arranged in a ring shape at intervals of L around the gas flow paths 2 and 3. Outside flow path wall and inside flow path wall are each adjacent to the upper face 8 and lower face 9. Thereupon, in relations among height H having longer projection part 4, height h having shorter projection part 6 and length L of the refractory material, h/H is <1 and L/H is 7-21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refractory for a regenerator used for the purpose of storing heat in a regenerator of a glass melting furnace.

BACKGROUND OF THE INVENTION Exhaust gas discharged from the outlet of a glass melting furnace is guided to a heat storage chamber and heats a refractory for the heat storage chamber. At this time, heat transfer from the high-temperature exhaust gas to the refractory is mainly through radiation heat transfer.

On the other hand, when cooling air is heated by preheated refractories, heat exchange is mainly performed by convection.

In order to efficiently conduct this convective heat transfer, conventional refractories for heat storage chambers have a cylindrical shape as shown in FIG. 18, for example (see Japanese Patent Laid-Open No. 149139/1982). This refractory 10
1 has a devised shape to have a large specific surface area.

In another example, efforts have been made to increase the specific surface area and to make the air flow in contact with the regenerator refractory more turbulent than laminar. This effort has also brought about good results in terms of heat transfer (through radiant heat) from high-temperature exhaust gases to refractories.

FIG. 19 shows a refractory brick 102 for a heat storage chamber disclosed in Japanese Patent Application No. 62-46680. This refractory brick is a cylindrical refractory whose horizontal cross section is substantially rectangular. The gas flow path wall has multiple bellows-shaped unevenness perpendicular to the gas flow path. A plurality of these cylindrical refractories are horizontally arranged with their ridges adjacent to each other to form a layer, and a large number of these layers are piled up to form an empty stack structure for a heat storage chamber. A large number of gas flow paths are formed in the vertical direction in the empty stack structure for the heat storage chamber.

Problems to be Solved by the Invention However, the specific surface area of the 10 refractories disclosed in JP-A No. 55-149139 is insufficient, and the empty stacked structure in which many of these refractories are piled up is susceptible to cold air and high-temperature fire resistance. Heat exchange through convection between objects is not sufficient.

The refractory 102 shown in Japanese Patent Application No. 62-46680 is
By adding a large number of bellows-like irregularities, the specific surface area is increased, and convective heat transfer is promoted by creating turbulence in the air.

However, there was a limit to further increasing air turbulence and promoting convective heat transfer. For example, in order to increase air turbulence, only the height of the bellows-shaped unevenness can be increased without changing the pitch, and the air in the center of the channel can be drawn further toward the channel wall. .

However, on the other hand, the concave portion of the unevenness also becomes deeper, and the inflow of air into this portion does not increase as much as expected.

For this reason, convective heat transfer does not increase as the unevenness increases. In addition, when increasing the height of the unevenness to increase air convection, the tall unevenness is lined up in succession, which has the disadvantage that suspended matter contained in the airflow tends to accumulate in deep depressions. .

Purpose of the Invention The present invention eliminates the disadvantages of the prior art and improves heat transfer between the refractory and the air by generating large turbulence and sufficiently capturing the air flow in the center of the channel into the channel wall. It is an object of the present invention to provide a refractory material for a heat storage chamber which has a shape that promotes the heating and prevents the accumulation of floating matter on the wall surface of a flow path.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the gist of the present invention is a refractory for a heat storage chamber according to claim 1.

Means for Solving the Problems The empty stacking structure of refractories for heat storage chambers of the present invention is characterized in that in the case of cylindrical refractories for heat storage chambers that are piled up in large numbers to form elongated gas flow paths extending in the vertical direction, A tall protrusion and a short protrusion are provided, and when the refractories for the heat storage chamber are piled up to form a gas flow path, the tall protrusion is arranged in an annular shape around the gas flow path, and the tall protrusion is It is characterized in that the ratio L/H between the height H of the part and the distance between the tall protrusions is 7 or more and 21 or less.

A gas flow path is formed by stacking the refractories for a heat storage chamber (hereinafter abbreviated as refractories) of the present invention, and tall protrusions are arranged in an annular shape.

Although it is not necessary to provide the tall protrusions at regular intervals throughout the gas flow path, providing them at regular intervals can further enhance the effect of making the gas flow turbulent.

Further, it is more effective if the tall protrusion arranged in an annular manner around the gas flow path is arranged perpendicularly to the longitudinal direction of the gas flow path.

An uneven portion may be provided on the joint surface (also referred to as a ridge surface) of the refractories, and the uneven portions of adjacent refractories may be configured to mesh with each other. In this case, it is advantageous to incorporate refractories of different heights so that the gas channels can communicate laterally.

Next, the reason why the shape of the protrusion provided on the refractory is limited as described above will be described in detail.

When the Reynolds number Re of the air flowing through the gas flow path and the height H of the tall protrusions are constant and the distance between the tall protrusions is changed, the value of the heat transfer coefficient changes and reaches a certain maximum value. observed to have.

In an actual glass tank, the Reynolds number Re varies depending on the operating conditions, so this maximum value has a certain range.

For example, if the surface temperature of the refractory is 1250°C to 1400°C, the inlet temperature of the air entering the heat storage chamber is 250 to 350°C, and the flow velocity of the air flowing inside the heat storage room is 0.1 to 0.5 m/sec. Consider the case where there is a change. The value of the heat transfer coefficient is L/H=
It takes a substantially constant maximum value within the range that satisfies conditions 7 to 21. This is because when the relationship L/H=7 to 21 is satisfied, the tall protrusion strongly draws the air flowing through the center of the gas flow path 2 toward the refractory gas flow path wall.

When L/H is smaller than 7 or larger than 21, the air flowing through the center of the gas flow path 2 cannot be strongly drawn to the refractory wall of the gas flow path. Therefore, the heat transfer coefficient between the refractory and air is small.

In the case of a cylindrical refractory for a heat storage chamber that is generally used in a gas tank and does not have a protrusion on the flow passage wall, the width across the gas flow passage is in the range of 100 to 200 m@.

Considering these conditions, the height of the tall protrusion H
is preferably set in the range of 10 mm to 35 mm. In the range where H is below 1Qmm or above 35mm, turbulence cannot be significantly increased.

The function of these tall protrusions is to create large turbulence.

Therefore, even when only tall protrusions are provided on the refractory, heat transfer can be sufficiently promoted compared to the case where no tall protrusions are provided. However, heat transfer is further promoted when a large number of short protrusions are provided between the tall protrusions.

A large number of low protrusions increases the specific surface area of the refractory,
The synergistic effect with the tall protrusion further promotes heat transfer.

This function of the short protrusion is not related to the difference in the direction of the ridgeline of the short protrusion.

That is, heat transfer is promoted in the same way whether the direction of the ridge line is perpendicular or horizontal to the upper and lower surfaces of the refractory. The height of the short protrusion needs to be 5 mm or more. If it is less than 5 mn+, heat transfer will not be promoted sufficiently.

In this way, since the height of the short protrusion can be set lower than H, floating objects in the airflow are less likely to accumulate.

The ridge surface of the refractory may be provided with unevenness. This unevenness is for the purpose of interlocking two refractories when they come into contact with each other at the ridge surface. In the engaged state, even if an external force is applied to either of the two refractories, they will not slip on the ridge. Therefore, when these refractories are combined vertically and horizontally into one empty stack structure, this empty stack structure is mechanically extremely strong.

Function When the refractories according to the present invention are stacked, tall protrusions are arranged in an annular manner along the gas flow path wall.

This tall protrusion acts as a barrier with a height H against the airflow flowing through the gas flow path.

As a result, an air vortex is created behind the front high protrusion. The generation of this vortex promotes convective heat transfer between the refractory and the air.

On the other hand, the short protrusions serve to increase the specific surface area of the refractory.

Example A more detailed explanation will be given with reference to the drawings.

FIG. 1 shows an example of a refractory for a heat storage chamber (hereinafter abbreviated as refractory) according to the present invention.

The refractory 10 has an upper surface 8 and a lower surface 9 having substantially rectangular outer contours,
It has a cylindrical shape as a whole and has two openings on the top and bottom. The space connecting the two openings is the gas flow path 2.
is formed.

This gas channel 2 is surrounded by four inner channel walls.

The outer sidewall has four ridges and four outer channel walls. Then, as shown in FIG. 17, refractories are piled up. Here, adjacent refractories are in contact with each other at the ridge surface. At this time, four elongated spaces are created around one refractory surrounded by the outer channel wall and the outer channel wall of the other refractory.

These four elongated spaces form a gas flow path 3 that is parallel to the gas flow path 2 and communicates in the vertical direction.

By stacking the refractories 10 vertically and horizontally in this manner, it is possible to form an empty stacked structure having a large number of elongated gas passages 2 and 3 that are open in the vertical direction and parallel to each other.

Around the gas flow path 2°3, a tall protrusion 4 is formed in an annular shape.
An outer channel wall and an inner channel wall, spaced apart by L (see FIG. 17), adjoin the upper surface 8 and the lower surface 9, respectively.

A mountain-shaped tall protrusion 4 is provided in each of these eight adjacent portions.

In other words, it can be said that the tall protrusion 4 is provided on the opening side of both the outer channel wall and the inner channel wall.

This tall protrusion 4 protrudes perpendicularly to the gas flow path 2, and the direction of the ridge line thereof is parallel to the upper and lower surfaces 8.9. A large number of short protrusions 6 are provided in the gaps between the tall protrusions 4 provided at both ends of the outer channel wall and the inner channel wall. This short protrusion 6 also has a mountain range shape. And the direction of the ridgeline is the upper and lower surfaces 8
, 9.

Asperities 5 are provided on the ridge surface. The unevenness 5 is for engaging with the unevenness provided on the ridge surface of another refractory when the refractory comes into contact with the ridge surface of the other refractory.

FIG. 2 is a sectional view taken along the line CC in FIG. 1. In FIG. 2, h is the height of the short protrusion 6 from the bottom to the tip, and H is the height of the tall protrusion 4 from the bottom to the tip.

L is the total length of this refractory. When a large number of refractories are piled up, L corresponds to the interval between tall protrusions 4.

When the lower opening of another similar refractory is placed on top of the upper opening of this refractory, the tall protrusions 4 are lined up continuously with an interval in the vertical direction. The portions of the two tall protrusions 4 that are tightly overlapped can function as one tall protrusion 4.

Here, h/H<1 between the height H of the tall protrusion 4, the height h of the short protrusion 6, and the length L of the refractory, and L/H=7 There are ~21 relationships.

Therefore, if this relationship is maintained, various combinations of the heights of the tall protrusion 4 and the short protrusion 6 are possible. The combination of tall protrusions 4 and short protrusions 6 having such a relationship may be applied differently to the outer channel wall and the inner channel wall of the refractory.

That is, h and H may have different sizes on the inside and outside of the refractory.

3 to 6 show modifications of the refractory 10 shown in FIG. 1.2, respectively.

FIG. 3 shows a refractory 20 in which a tall protrusion 24 is provided on the opening side of one of the outer channel wall and the inner channel wall.

By stacking the refractories 20 in the vertical direction, the tall protrusions 24 are arranged continuously at lengthwise intervals on each of the outer channel wall and the inner channel wall.

FIG. 4 shows a refractory 30 in which tall protrusions 34 are provided on one opening side of the outer channel wall and on the other opening side of the inner channel wall. By stacking the refractories 30 in the vertical direction, the tall protrusions 34 can be continuously arranged at length intervals on each of the outer channel wall and the inner channel wall.

FIG. 5 shows a refractory 40 in which a tall protrusion 44 is provided on one opening side of the inner channel wall.

FIG. 6 shows a refractory 50 in which a tall protrusion 54 is provided on one opening side of the inner channel wall.

The length of refractory 40.50 in Figures 5 and 6 is l/2
In the case of XL, when these are stacked alternately in the vertical direction, the tall protrusions 44, 54 are continuously arranged at length intervals on each of the outer channel wall and the inner channel wall. and the fourth
The function is the same as when only the refractories 30 shown in the figure are stacked.

FIG. 7 is a top view when the refractories 10 of FIG. 1 are lined up with other refractories 10 in contact with their ridges. The concavities and convexities 5 provided on the ridge surfaces of the two refractories are designed to mesh perfectly with each other.

Therefore, when this refractory is assembled vertically and horizontally into an empty stack structure, this empty stack structure is mechanically extremely strong.

These unevenness 5, like the short protrusion 6, are mountain-shaped, and the ridge lines of the mountains are perpendicular to the upper surface 8 and the lower surface 9. and the seventh
In the figure, if the refractory on the left is turned upside down, it is designed to match the arrangement of the unevenness 5 on the refractory on the right.

The advantage of the shape and arrangement of the unevenness 5 is that the shape of the refractory is simplified and manufacturing is facilitated. A further advantage is that the empty stack structure can be constructed with one type of refractory material.

However, in the technical idea of the present invention, the only requirement for the unevenness 5 is that it perfectly meshes with the ridge surface of the adjacent refractory.
There are no other limiting conditions.

The above is an example in which the ridgeline of the mountain of the short protrusion is perpendicular to the upper surface 8 and lower surface 9 of the refractory.

Next, an example will be described in which the ridgeline of the mountain of the short protrusion is parallel to the upper surface 8 and lower surface 9 of the refractory.

FIG. 8 is an example of a refractory for constructing the empty stack structure of the present invention.

The refractory 100 has an upper surface 108 and a lower surface 109 whose outer contours are substantially rectangular, and the refractory 100 has a cylindrical shape as a whole and has two openings on the upper and lower surfaces.

A space connecting the two openings forms a gas flow path 102.

This gas flow path 102 is surrounded by four inner flow path walls.

The outer sidewall has four ridges and four outer channel walls.

These outer channel walls and inner channel walls each have an upper surface 10.
8 and the lower surface 109.

Tall mountain-shaped protrusions 104 are provided in these eight adjacent portions, respectively. This tall protrusion 104 protrudes perpendicularly to the gas flow path 102, and the direction of the ridgeline of the mountain is parallel to the upper surface 108 and the lower surface 109.

A large number of short protrusions 1 are provided in the gaps between the tall protrusions 104 provided at both ends of the outer channel wall and the inner channel wall.
06 is provided. The short protrusion 106 has a mountain range shape. The direction of the ridge line is the upper surface 108.
, horizontal to the lower surface 109.

Irregularities 105 are provided on the ridge surface.

FIG. 9 is a sectional view taken along line DD in FIG. 8. In FIG. 9, h is the height of the short protrusion 106 from the bottom to the tip, and H is the height of the tall protrusion 104 from the bottom to the tip. L is the total length of this refractory. When a large number of refractories are stacked, L corresponds to the distance between tall protrusions.

When a large number of these refractories 100 are stacked vertically and horizontally, the tall protrusions 104 are continuously lined up at intervals of L in the vertical direction and arranged in an annular shape around the gas flow path. The portions of the two tall protrusions 104 that overlap can then function as one tall protrusion 104.

The height H of the tall protrusion 104 and the short protrusion 10
The relationship between the height h of 6 and the length of the refractory is h/H<1, and L/H=7 to 20. Therefore, if this relationship is maintained, various combinations of the heights of the tall protrusion 104 and the short protrusion 106 are possible. The combination of tall protrusions 104 and short protrusions 106 in such a combination may be applied differently to the outer and inner channel walls of the refractory.

10 to 14 are modifications of FIG. 19, respectively.

FIG. 10 shows a refractory 110 in which a tall protrusion 114 is provided on the opening side of one of the outer channel wall and the inner channel wall. By stacking the refractories 110 in the vertical direction, the tall protrusions 114 can be continuously arranged at intervals equal to the lengths of the outer channel wall and the inner channel wall, respectively.

FIG. 11 shows a refractory 120 in which a tall protrusion 124 is provided on one opening side of the inner channel wall. By stacking this refractory 120 in the vertical direction, the tall protrusion 1
24 can be consecutively arranged at length intervals on each of the outer channel wall and the inner channel wall.

FIG. 12 shows a refractory 130 in which a tall protrusion 134 is provided on one opening side of the inner channel wall.

FIG. 13 shows a refractory 140 in which a tall protrusion 144 is provided on one opening side of the outer channel wall.

Here, if the length of the refractories 130° 140 in FIGS. 12 and 13 is 1/2 XL, if these are stacked alternately in the vertical direction, the tall protrusions 134 and 144 will form on the outer channel wall and the inner side. They are arranged consecutively at length intervals on each channel wall.

Then, it functions in the same way as when only the refractories 120 shown in FIG. 11 are stacked.

FIG. 14 shows a case where the arrangement of the short protrusions 106 in FIG. 9 is different between the outer flow path portion and the inner flow path portion. In other words, in FIG. 14, the outer and inner sides of the short protrusion 156 are vertically shifted by half the width of the bottom. The scope of the present invention also includes a case where the arrangement of the short protrusions 156 on the outside and inside of the refractory is not symmetrical.

FIG. 15 is a top view when the refractory 100 of FIG. 8 is lined up with other refractories 100 with their ridges in contact.

The concavities and convexities 5 provided on the ridge surfaces of the two refractories are designed to mesh perfectly with each other.

Therefore, when this refractory 100 is assembled vertically and horizontally into one empty stack structure, this empty stack structure is mechanically extremely strong.

These unevenness 5 are mountain-shaped like the short protrusion, the ridgeline of the mountain is parallel to the upper and lower surfaces of the refractory, and the height and width of the bottom of the mountain are also the same as the short protrusion. The ridgeline of the short protrusion and the ridgeline of the unevenness 5 are arranged so as to be continuous on the wall surface of the refractory. Furthermore, as shown in FIG. 16, the unevenness 5 is designed so that when the left refractory is turned upside down, it exactly matches the position of the right refractory.

The advantage of the shape and arrangement of the irregularities is that the shape of the refractory is simplified, making it easier to manufacture, and furthermore, the empty stack structure can be constructed with one type of refractory.

However, in the technical idea according to the present invention, the requirement for the unevenness 5 is that it perfectly meshes with the ridge surface of the adjacent refractory, and there are no other limitations.

The technical idea according to the present invention has been described above with respect to the case where the direction of the ridgeline of the short protrusion is parallel to the upper and lower surfaces of the refractory and the case where it is perpendicular.

A case where the direction of the ridgeline of the short protrusion is oblique to the upper and lower surfaces of the refractory is also within the scope of the present invention.

Hereinafter, as is applicable to all of the refractories described above using examples, the tall protrusion and the short protrusion are parts that protrude in the shape of a mountain range. These have a bottom and a tip. The shape of the cross section perpendicular to the ridgeline of the mountain range can have many degrees of freedom.

For example, the cross section may be a square, a triangle, a trapezoid, a part of a circle, or a combination thereof. Further, the cross section does not have to be symmetrical between the left and right sides. For example, when the ridgeline is parallel to the upper and lower surfaces of the refractory, it may be a triangle whose apex is shifted toward the bottom of the refractory.

Such a cross-sectional design is determined by considering a shape that prevents floating matter floating in the gas flow from being deposited in the valley adjacent to the protrusion, and a shape that is easy to manufacture.

A large number of short protrusions are provided in the gaps between the tall protrusions, but they do not need to be arranged so as to cover all the gaps. For example, they may be arranged with a gap between them.

Effects of the Invention When the refractories for heat storage chambers of the present invention are piled up in this way to form a gas flow path that communicates in the vertical direction, tall protrusions are arranged in an annular shape perpendicular to the longitudinal direction of the gas flow path. . Furthermore, by setting the relationship between the spacing and height H of these tall protrusions to L/H = 7 to 21, it is possible to create strong turbulence in the air flow flowing through the gas flow path, resulting in The airflow flowing through the center of the channel is strongly guided to the side wall surface of the refractory.

Therefore, if the refractory for a heat storage chamber of the present invention is made into an open stack structure, heat exchange can be performed effectively.

On the other hand, the strong airflow thus directed from the center towards the side wall surfaces by the tall protrusions comes into strong contact with the short protrusions and recesses. As a result, due to the synergistic effect of the increased surface area of the side wall surface of the refractory due to the provision of the short protrusion, the side wall surface of the refractory can more strongly exchange heat with the air flow.

Note that the following items can be mentioned as embodiments of the present invention.

1. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
Refractories for heat storage chambers in which the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridges of the refractories are arranged in large numbers adjacent to each other in the horizontal direction to form multiple elongated gas flow paths that communicate in the vertical direction. In this method, a mountain range-shaped protrusion A is provided in a part of the inner channel wall or the outer channel wall adjacent to the upper and lower surfaces, and the mountain ridge line is parallel to the upper and lower surfaces, and the remaining part of the channel wall is When a large number of protrusions B are provided, the height from the bottom of protrusion A to the tip is H, the height from the bottom to the tip of protrusion B is h, and the length of the refractory is L. , the ratio of h/H is 1 or less, and L/H
A refractory for a heat storage chamber having a ratio of 7 or more and 21 or less.

2. The refractory for a heat storage chamber according to Embodiment Item 1, wherein the protruding portion B is mountain-shaped and the angle between the ridgeline of the mountain and the upper and lower surfaces is an arbitrary angle of 0° or more and 90° or less.

3. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
Refractories for heat storage chambers in which the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridges of the refractories are arranged in large numbers adjacent to each other in the horizontal direction to form a plurality of elongated gas flow paths that communicate in the vertical direction. , a part of the inner channel wall adjacent to either the upper surface or the lower surface and a part of the outer channel wall adjacent to either the upper surface or the lower surface. , a mountain-shaped protrusion A with mountain ridge lines parallel to the upper and lower surfaces is provided, a large number of protrusions B are provided on the remaining part of the channel wall, and the height from the bottom to the tip of the protrusion B is h, If the height from the bottom to the tip of the protrusion A is H, and the length of the refractory is L, then h
/H ratio is 1 or less, and L/H ratio is 7 or more and 21 or less.

4. The refractory for a heat storage chamber according to embodiment item 3, wherein the protruding portion B is mountain-shaped and the angle between the ridgeline of the mountain and the upper and lower surfaces is an arbitrary angle of 00° or more and 90° or less.

5. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
Refractories for heat storage chambers in which the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridges of the refractories are arranged in large numbers adjacent to each other in the horizontal direction to form multiple elongated gas flow paths that communicate in the vertical direction. In this case, a protrusion A is provided in a part of the inner channel wall adjacent to either the upper surface or the lower surface, and the ridge line of the mountain is parallel to the upper and lower surfaces, and the remaining part of the channel wall is When a large number of protrusions B are provided, the height from the bottom of the protrusion B to the tip is h, the height from the bottom to the tip of the protrusion A is H, and the length of the refractory is L. , the ratio of h/H is 1 or less, and the ratio of L/H is 1 or less;
A refractory for a heat storage chamber having an H ratio of 7 or more and 21 or less.

6. The refractory for a heat storage chamber according to embodiment item 5, wherein the protruding portion B is mountain-shaped and the angle between the ridgeline of the mountain and the upper and lower surfaces is an arbitrary angle of 00° or more and 90° or less.

7. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
A large number of refractories are arranged so that the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridge surfaces of the refractories are adjacent to each other in the horizontal direction to form a plurality of elongated gas flow paths that communicate in the vertical direction. In the product, a mountain range-shaped protrusion A with mountain ridge lines parallel to the upper and lower surfaces is provided on a part of the inner channel wall or the outer channel wall adjacent to the upper and lower surfaces, and A refractory for a heat storage chamber whose ratio of L/H is 7 or more and 21 or less, where H is the height to the tip and L is the length of the refractory.

8. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
Refractories for heat storage chambers in which the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridges of the refractories are arranged in large numbers adjacent to each other in the horizontal direction to form multiple elongated gas flow paths that communicate in the vertical direction. , a part of the inner channel wall adjacent to either the upper surface or the lower surface, and a part of the outer channel wall adjacent to either the upper surface or the lower surface. , a mountain-shaped protrusion A with mountain ridge lines parallel to the upper and lower surfaces is provided, a large number of protrusions B are provided on the remaining part of the channel wall, and the height from the bottom to the tip of the protrusion A is H; A refractory for a heat storage chamber whose ratio of L/H is 7 or more and 21 or less, where L is the length of the refractory.

9. A cylindrical refractory whose horizontal cross-sectional outline is approximately rectangular,
A refractory for a heat storage chamber in which the upper and lower surfaces of the refractories are connected in the vertical direction, and the ridges of the refractories are arranged horizontally so that they are adjacent to each other, forming a plurality of elongated gas flow channels that communicate in the vertical direction. In the product, a protrusion A is provided in a part of either the inner channel wall or the outer channel wall adjacent to the upper surface or the lower surface, the ridge line of the mountain is parallel to the upper and lower surfaces, If a large number of protrusions B are provided in the remaining part of the channel wall, the height from the bottom to the tip of the protrusions A is H, and the length of the refractory is L, the ratio of L/H is 7 or more. Refractories for heat storage chambers with a temperature of 21 or less.

10. Any one of the embodiment items 1 to 9, characterized in that the ridge surface of the refractory is uneven and is in a mutually interlocking relationship with the ridge surface of the adjacent refractory that is in contact with this ridge surface. The refractory for a heat storage chamber according to item 1.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the refractory for a heat storage chamber according to the present invention, FIG. 2 is a sectional view taken along the line CC in FIG. 1, and FIGS. 3 to 6 are other embodiments of the refractory for a heat storage chamber. 7 is a sectional view showing the first
FIG. 8 is a perspective view showing another embodiment of the present invention, and FIG. DD cross-sectional view, FIGS. 10 to 14 are cross-sectional views showing still other embodiments, and FIG.
The figure is a top view showing the joints of adjacent refractories when the refractories shown in Figure 8 are stacked, and Figure 16 is E in Figure 15.
17 is a perspective view showing a part of the empty stacking structure of refractories for a heat storage chamber in which the refractories shown in FIG. 1 are stacked to form a gas passage extending in the vertical direction. The figure is a perspective view showing a conventional refractory. 10.20.30,40,50゜100.110,120,130゜140.150. , , , , Refractory 14.24, 34.44.54 ゜ 64.74, 84, 94, 104 ゜ 114. 124, 134, 144 ゜ 154 , , , , , , , , Tall protrusion 16.26.
36.46.56° 66.76.86, 96, 106° 116.126, 136, 146° 156, , , , , , , , Short protrusion 2.3, 10
2. , , , , Gas flow path Fig, 6 Mukuq FIG, 18 FIG, 1'?

Claims (1)

[Claims] In a cylindrical refractory for a heat storage chamber that is stacked in large numbers to form a long and narrow gas flow path extending in the vertical direction, a tall protrusion and a short protrusion are provided on the wall surface, When refractories are piled up to form a gas flow path, tall protrusions are arranged in a ring around the gas flow path, and the height H of the tall protrusions and the distance L between the tall protrusions are A refractory for a heat storage chamber, characterized in that the ratio L/H is 7 or more and 21 or less.