JPS5849793B2 - How to build industrial furnace walls - Google Patents

Description

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

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

For example, as shown in FIGS. 1 to 3, the faces 2 of blocks 1 are aligned and stacked in several stages. During this process, one end of the hook 3 is welded to the shell steel plate 4, 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 a heat insulating material 8.

Repeat this step to complete the solid wall.

It is thought that it is advantageous for the block 1 used in this method to be larger to some extent in terms of weight and efficiency in constructing the furnace wall.

However, since this block 1 has a shape in which the front flange forming the surface 2 and the rear flange opposing this are joined by the web, making the block 1 large means that both flanges This will greatly improve the shape of the department.

This is quite difficult to manufacture due to its shape, and especially when manufactured from fire-resistant bricks, both flanges must be made unnecessarily thick due to pressing.

Therefore, the shape of this block does not have a large impact despite the increased weight.

Moreover, the front and rear flanges and web portions of the block 1 must be made of the same material, but when viewed as a furnace wall, the rear flange portion is of lower quality than the web portion.

Therefore, there is also an economic problem.

Therefore, the present invention aims to completely improve the blocks used and to provide a method for constructing industrial furnace walls more efficiently and economically.

The present invention will be explained below based on one embodiment shown in the drawings.

The first refractory block 11 used in this method is shown in FIG.
The second refractory block 12 is shown in FIG.

The first refractory block 11 is a rectangular parallelepiped having a length corresponding to the thickness of the refractory layer of the furnace wall, an appropriate width considering strength, and a height considering the overall size and weight. , grooves 13 are provided vertically on both sides of one end in the length direction, and grooves 14 are provided vertically on both sides of the other end.

The second refractory block 12 has a rectangular flat plate shape, the short side thereof is equal to the height dimension of the first refractory block 11, and along each side there are convex stripes sized to engage with the groove 13. 15, the long side is set to be equal to the space between the first refractory blocks 11 in the horizontal direction on the furnace wall, and the thickness is easily determined during the construction work. It is relatively thin enough to not break.

When constructing a furnace wall using these blocks 11 and 12, as shown in FIGS. 6 and 7, the convex strips 15 are engaged with the grooves 13, and the inside of the furnace shell steel plate 16 is The first refractory block 11 and the second
In addition to arranging the refractory blocks 12, grooves 14 of horizontally adjacent first refractory blocks 11 on the core side,
A plywood board 18 cut into a size corresponding to the second fireproof block 12 is inserted between the holes 14 and 14.

This forms a cavity between the second refractory block 12 and the plywood board 18.

With this operation, three to several blocks 11.
12 and plywood 18 are stacked.

Meanwhile, the hook 3 shown in FIG. 3 is welded to the shell steel plate 16 on one side and the block 11 or
2.

Then, the monolithic refractory 19 is poured into the cavity and filled.

Then, the above stacking and pouring operations are repeated to construct the furnace wall.

When the temperature of the furnace wall constructed in this manner rises due to operation of the furnace, the plywood board 18 is burned away, and the surface of the filled refractory 19 is exposed inside the furnace.

In constructing this furnace wall, the first refractory block 11 and the second
Since the refractory block 12 is formed separately, the first refractory block 11 exposed on the inner surface of the furnace is of high quality, and the second refractory block 12 is of low quality. things can be used.

This is because the second refractory block 12 is located at the outermost part of the refractory layer, so it does not need to be very strong, and the point is that it is a heat insulating layer that normally absorbs water when the monolithic refractory 19 is poured. It is sufficient to have enough strength to block the inflow to 17 and not break during pouring.

Therefore, there is no problem even if the second refractory block 12 is quite thin, and in terms of manufacturing, it can be made thinner than when it is formed integrally with the first refractory block 11, and each block is also thinner than the conventional one-piece type. is also easy to manufacture,
Economical.

In terms of construction work, work efficiency may be reduced compared to the conventional method in that the furnace walls are constructed without assembling blocks, but since each block can be made larger, work efficiency is improved accordingly. The result is greater work efficiency than before.

In the above embodiment, instead of the plywood board 18 used, a material that will be destroyed by fire, such as a vinyl board, may be used, or, conversely, a material that will surely remain after the temperature rises, such as a heat-resistant metal plate, may be used.

In addition to the shape of the first refractory block in the embodiment, the block may have a shape 11a as shown in FIG. 8.

In the figure, reference numeral 20 denotes an uneven surface, which is intended to improve the bonding with the monolithic refractory, and should rather be provided.

Reference numeral 21 denotes a hook engagement hole, and when constructing the furnace wall, the base end of the hook is welded to the furnace shell steel plate and the hook portion at the other end is engaged with the hole 21 to connect the furnace shell steel plate and the refractory layer. It is provided to ensure that.

Instead of the hook retaining hole 21, a T-groove enlarged on the inside may be provided to engage the head or nut of the bolt.

Also, the planar shape is elongated, but in some cases T
You can also make it into a letter shape.

In addition, in the embodiment, the width dimension of the second fireproof block 12 is
Although the arrangement interval dimensions of the refractory blocks 11 are set, depending on the case, the second refractory blocks may be divided into two or three pieces and the second refractory blocks may be connected to each other by grooves and protrusions.

In addition, although the first refractory block 11 has a structure in which a groove 14 is provided in order to install a plate at the end of the reactor core, the groove may be a discontinuous groove, and the plate can be fastened with screws, nails, hook bolts, etc. etc. can also be used.

In that case, a female screw or water faucet may be embedded in the core side end, 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 the blocks are the same or different from the castable refractories used.

As described above, according to the present invention, it is possible to provide a method for constructing an industrial furnace wall p which is economical and has good work efficiency.

[Brief explanation of the drawing]

Figure 1 is a partial front view from inside the furnace showing the state in the middle of construction of an industrial furnace wall by a conventional method, and Figure 2 is a
A sectional view, FIG. 3 is a B-B sectional view in FIG. 1, and FIG. 4 shows the first refractory block used in an embodiment of the method of the present invention. A side view, FIG. 5 shows the second fireproof block used in the same example, and a is a plan view;
b is a front view, C is a side view, and Fig. 6 is a method 1 of this invention.
FIG. 7 is a partial front view from inside the furnace showing a state in the middle of construction of the embodiment, FIG. 7 is a cross-sectional view taken along line CC in FIG. 6, and FIG. An example is shown in which a is a plan view, b is a front view, and c is a side view. 11...First fireproof block, 12...Second fireproof block, 13.14...Concave groove, 15...
...Convex strip, 16... Furnace shell steel plate, 11...
...Heat insulation layer, 18...Curved plywood board.

Claims (1)

[Claims] 1. In a method for constructing an industrial furnace wall in which a refractory layer consisting of a refractory block and an unshaped refractory is bonded to the inside of a furnace shell, a first refractory block having a length corresponding to the thickness of the refractory layer is provided. The above-mentioned refractory layer shapes are arranged horizontally (at predetermined intervals) with one end of each facing toward the reactor core at a predetermined position, and another plate-shaped Second
A partition layer is formed by a fireproof block, and the first
An extinguishable combustible plate or heat-resistant metal plate is installed across the core-side end of the refractory block, and an inflammable plate or heat-resistant metal plate is installed in the cavity formed between the partition layer and the combustible plate or heat-resistant metal plate. A method of constructing an industrial furnace wall characterized by pouring and filling a shaped refractory.