JPS5849792B2 - How to build an industrial furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing an industrial furnace in which a refractory layer consisting of refractory blocks and monolithic refractories is bonded to the inside of the furnace shell.

The conventional construction method for this type of furnace is to use a block with a hollow hole in the center and grooves on both sides, and to create a block with communicating holes in the vertical direction. There is a method of stacking them and filling the communicating holes with monolithic refractories to form an integral wall structure.

For example, as shown in FIGS. 1 to 3, the faces 2 of the blocks 1 are aligned and stacked in several stages. During this process, one end of the hook 3 is attached to the steel plate 4 of the furnace shell, and the other end is inserted into the block.

Next, the communication holes 5 and 6 formed by the block 1 are filled with monolithic refractories 7 from above.

Then, the gap between the furnace shell steel plate 4 and the block 1 is filled with monolithic refractory 8.

Repeat this step to complete the solid wall.

In furnace walls constructed by this method, the front portion 2 of the block is often damaged and missing during use at high temperatures.

The thickness of the furnace shell is determined by considering thermal conditions, mechanical stability, etc., but damage to the front flange 2 will result in a decrease in the wall thickness, and depending on the properties of the monolithic refractory 7 filled, May cause severe damage to furnace walls.

Furthermore, damage to the front face 2 of the block is not desirable since it spoils the aesthetic appearance of the product.

This invention is an attempt to improve the drawbacks of the above-mentioned conventional furnace wall groove construction method.

The present invention will be explained below based on the illustrated embodiments.

Block 11 is used in this method. Block 11
As shown in FIGS. 4 to 6, it consists of a rectangular flange portion 12 and two web portions 13 projecting from one side of the flange portion 12 by a predetermined distance at right angles.

Grooves 14 are provided on both sides at the tip of the web portion.

When constructing a furnace wall using this block 11, as shown in FIGS. 7 and 8, the outer edges of the flange portions 12 are in contact with each other, and the web portion 1 is inserted into the furnace.
Stack the blocks 11 with 3 facing.

Then, a plywood board 15 cut to a predetermined size is inserted between the grooves 14 of the web portion 13 that are opposed to each other.

As a result, a cavity communicating vertically is formed between the flange portion 12 of the block 11 and the plywood plate 15, and a monolithic refractory, such as a castable refractory, is placed in the space.
Fill 6.

In addition, when loading the blocks 11, the furnace shell steel plate 1 is
A hook (not shown) is welded to 7 and inserted into the block 11 as shown in FIG. The voids are also filled with monolithic refractories 18 in the same manner as in the prior art.

In place of this monolithic refractory 18, a fireproof block, firebrick, heat insulating material, etc. may be used.

When the temperature of the furnace wall constructed in this manner increases, the plywood board 15 is burned away, and the surface of the filled refractory 16 is exposed inside the furnace.

The surface of this filled refractory 16 is superior in strength to the front flange portion 2 of a conventional block, and there is no chance of that portion missing.

In the above embodiment, instead of the plywood board 15 used, it is possible to use a material that will be destroyed by fire, such as a vinyl board, or conversely, a material that will definitely remain even after the temperature rises, such as a heat-resistant metal board. .

In addition to the shapes of the blocks in the example, the shapes of the blocks are as shown in FIG.
It is also possible to use the webs 11a and 1lb as shown in FIG. 10, or those in which the web portion 13 thereof is provided with stepped or wavy irregularities 19 like the web 13a in FIG.

Rather, the shape having the unevenness 19 is better for joining with the monolithic refractory.

In terms of (7), elements corresponding to the unevenness 19 may be provided on the upper and lower surfaces of the web portion 13a instead of on both sides as shown in the figure, or may be provided on the upper and lower surfaces and both side surfaces.

Furthermore, in addition to the blocks described above, blocks 11c as shown in FIGS. 13 to 15 may also be used.

In the block Nc, the height of the protruding end of the web portion 13c is partially larger than the height of the flange portion 12c on both upper and lower sides, and the grooves 14 on both sides are continuous with the upper and lower grooves 25. There is.

The bottoms of both grooves 25 are at the same height as the flange portion 12c.

When this block-11c is used, the blocks are stacked as shown in FIG. 16.

That is, the protruding end surfaces of the wep portions 13c located on the inner side of the furnace wall are arranged in a staggered manner.

Therefore, as a plywood board, it is not possible for one plywood board 15 to straddle multiple stages of block stacking as shown in FIG. , and its holding state is strong.

In addition, although the groove 14 was used to install the board at the protruding end of the web part of the block, the groove may be a discontinuous groove, and the board may be fastened using screws, nails, hook bolts, etc. You can also do it.

In that case, a female thread or a wooden stopper may be embedded in the protruding end of the web portion, or a hook engaging portion may be provided.

Further, the blocks used in the method of the present invention may be fired or unfired, and there is no particular difference whether they are the same or different from the castable refractories used.

Furthermore, the blocks used in the method of the present invention can also be used for ceiling walls. For example, as shown in FIG. 11 is supported by the flange portion 12 and the plywood board 21 is installed, then the castable refractory material 22 may be poured.

As described above, according to the present invention, the amorphous refractory surface or the heat-resistant metal plate is exposed on the inner surface of the furnace wall, and damage caused by missing blocks themselves is almost eliminated.

[Brief explanation of drawings]

Fig. 1 is a partial front view of a furnace wall constructed by a conventional method as seen from the inside of the furnace, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1. 4 is a plan view of a refractory block used in one embodiment of the method of the present invention, FIG. 5 is a front view of the block, FIG. 6 is a side view of the block, and FIG. A partial front view of the furnace wall constructed by the method as seen from the inner surface of the furnace, FIG. 8 is a sectional view taken along line C-C in FIG. 7,
FIG. 9 is a plan view showing another example of the shape of the block used in the method of the present invention, FIG. 10 is a plan view showing another example of the shape of the block, and FIG. 11 is a plan view showing another example of the shape of the web portion of the block. FIG. 12 is a sectional view showing an example of a ceiling wall, FIG. 13 is a plan view showing an example of a different shape of the block used in the method of the present invention, and FIG. 14 is the same block. FIG. 15 is a side view of the same block, and FIG. 16 is a partial front view of the furnace wall constructed by the method of the present invention using the same block, viewed from the inner surface. 11... Fireproof block, 12... Flange part, 13... Wap part, 14...
...Groove, 15...Plywood board, 16...
・Castable refractory, 17... Furnace shell steel plate, 1
8... Monolithic refractories.

Claims (1)

[Claims] 1. In a method of constructing an industrial furnace in which a refractory material layer consisting of a refractory block and a monolithic refractory is bonded and formed on the inside of a furnace shell, the refractory block includes a flange portion and a predetermined dimension protruding from one side of the flange portion. The blocks are installed so that the outer edges of the flange portions are in contact with each other and the web portions face toward the inside of the furnace, and the web portions of each block are An extinguishable combustible plate or a heat-resistant metal plate is attached across the protruding end of the flange to form a cavity between the flange and the cavity is filled with a monolithic refractory. How to build an industrial furnace.