JPS5849794B2 - How to build industrial furnace walls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for constructing an industrial furnace wall having a refractory layer made of monolithic refractories on the inside of the furnace shell.

The conventional method for constructing furnace walls is to use blocks shaped like a hollow hole in the center and grooves on both sides.
There is a method in which the blocks are stacked vertically so that communicating holes are formed, and the communicating holes are filled with monolithic refractories to form 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, and during this time, 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 process to complete the 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 result in a larger section.

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

Therefore, the shape of this block cannot be made large enough to increase its weight.

Furthermore, although the front and rear flanges and web portions of the block 1 must be made of the same material, 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.

For this reason, the present invention aims to provide a method for efficiently and economically constructing industrial furnace walls without using blocks, but by taking advantage of the advantages of the method using blocks.

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

In this method, an anchor brick 11 as shown in FIG. 4 is used.

This anchor brick 11 has a rectangular parallelepiped shape with a length approximately corresponding to the thickness of the furnace wall, an appropriate width considering strength, and a height considering the overall size and weight, for example. , width 100mm, height 300mm, length 500mm
It is of mm.

Although not shown, uneven surfaces are formed on the upper and lower surfaces and both left and right sides to improve the connection with the monolithic refractory.

In addition, the base end of the anchor brick 11 is provided with a groove 13 in which one end of the towing hardware 12 engages as shown in FIG. 5, and the other end is provided with a plywood formwork plate. 14
Concave grooves 15, 15 are provided in which one end of the grooves 15 and 15 engage.

When constructing a furnace wall using these anchor bricks 11, as shown in FIG. 5, the furnace walls are constructed sequentially from the bottom to the top.

First, the lowermost anchor bricks 11 are arranged at predetermined intervals, one end of the traction hardware 12 is engaged with the groove 13, and the other end of the hardware 12 is connected to the steel plate 16 of the furnace shell.

Next, regular shaped refractory insulation bricks 17 are stacked at the same height so as to be in contact with both sides of the base end of the anchor brick 11 to form a refractory insulation layer.

The gap 18 between the anchor brick 11 and the shell steel plate 16 is appropriately filled with a refractory heat insulating material.

This ensures positioning of the anchor brick 11.

On the tip side of the anchor brick 11, a form board 14 pre-shaped to a predetermined size is installed by inserting it into the grooves 15, 15 facing each other in the adjacent anchor bricks.

Next, the second anchor brick 11 from the bottom is placed and connected to the steel plate 16 of the furnace shell using the towing hardware 12.

At this time, the base end of the anchor brick 11 is supported by the upper surface of the fireproof insulation bricks 17 stacked on both sides when the first stage anchor brick 11 is installed, and the tip end of the anchor brick 11 is supported by the upper edge of the formwork board 14. To support.

Next, similar to the first stage, fireproof insulation bricks 17 are stacked on both sides of the anchor bricks 11 at the same height as the anchor bricks 11.
The gap 18 is filled with a fireproof heat insulating material, and the form board 14 is inserted.

In this way, after installing the anchor bricks 11 in multiple stages, a monolithic refractory is poured and filled into the cavity 20 between the fireproof layer or the heat insulating layer made of the fireproof heat insulating bricks 17 and the form board 14. .

This procedure is then repeated to build up to the top of the furnace wall.

When the temperature of the furnace wall constructed in this manner rises due to operation of the furnace, the form plate 14 is burned away, and the filled monolithic refractory is exposed inside the furnace.

In constructing this furnace wall, the inner surface of the furnace wall is not entirely made of refractory blocks, but instead is formed from the end faces of the anchor bricks 11 and the formwork plates 14. Anchor brick 11 and formwork board 1 compared to
4, the size can be made larger, and work efficiency increases accordingly.

Moreover, one formwork plate is attached to the front flange of the conventional fireproof block.
4 has been replaced, and the rear flange of the conventional block is virtually nonexistent, so it is more economical than the method using the conventional block shown in FIGS. 1 to 3. is also significantly better.

The construction of such a furnace wall was made possible by positioning and supporting the proximal end of the anchor brick 11 with a shaped member such as a refractory insulation brick 17, and by positioning and supporting the proximal end of the anchor brick 11 with a shaped member such as the formwork plate 14. This is because it is supported by the upper edge of the .

Further, the conventional method of constructing a furnace wall using general anchor bricks and monolithic refractories requires a large-scale formwork for the monolithic refractories that form the inner surface of the furnace wall.

In comparison, the form board 14 is only connected to the tip of the anchor brick and does not require a framework.

Therefore, it can be said that this furnace wall construction method takes advantage of the advantages of the conventional method using blocks and the method using anchor bricks, and eliminates the drawbacks of each.

In the above embodiment, the formwork plate 14 is burnt down, but depending on the case, the formwork plate 14 may be removed before starting operation.

In that case, for example, the grooves 15 of the anchor bricks 11 may be formed deeply in advance so that one side of the anchor bricks 11 can escape from the grooves 15 when the form plate 14 is moved horizontally.

If removal is considered in this way, there are no restrictions on the material used for the formwork board.

In addition, if it is not removed, it is also possible to use a heat-resistant metal plate that can be used as is for the S furnace wall.

Further, in the above embodiment, the base end of the anchor brick 11 is positioned and supported by the shaped material, but in some cases, a metal fitting may be attached to the furnace shell side, and the positioning and support may be performed using the metal fitting. It's okay.

For example, as shown in FIGS. 6a, b, and c, metal fittings 30a, 30b, and 30c each having an L-shaped cross section are welded to the shell steel plate 16, and the base end of the anchor brick is positioned and supported by each metal fitting 30a, 30b, and 30c, respectively, each having an L-shaped cross section. Make it.

Figure a shows a case where no shaped heat insulating material or shaped refractory is used, figure b shows a case where a heat insulating board 31 is used but is not positioned or supported by it, and figure C shows a case where a heat insulating board 31 and a shaped refractory are used. This is the case when insulation materials 32 are used but are not positioned and supported by them.

Therefore, the base end of the anchor brick may be supported by positioning and supporting either a shaped member or a metal fitting provided on the furnace shell side.

In addition, in the above-mentioned embodiment and those shown in FIGS. 6a and 6b, the formwork plate 14 is located closer to the shell than the end face of the anchor brick 11, but the support of the tip of the anchor brick is not supported by the anchor brick. If you want it to come into contact with the tip surface of the
As shown in the figure, an inner small protrusion 33 is provided inside the center of the upper edge of the formwork board 14a, an engaging part 35 of the nant 34 is provided on the anchor brick 11a, and the formwork board 14a is held down with the presser plate 36 and bolts 37. If attached, the tip of the anchor brick 11a can be supported by the small convex portion 33.

As described above, according to the present invention, it is possible to provide an economical and highly efficient method of constructing an industrial furnace wall.

[Brief explanation of drawings]

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 BB sectional view in FIG. 1, and FIG. 4 shows an anchor brick used in an embodiment of the method of the present invention. , FIG. 5 is a partial cross-sectional perspective view of a furnace wall part in the middle of construction for explaining an embodiment of the present invention, and FIGS. 6a, b, and c show states in the middle of construction of furnace walls with different structures. d is a longitudinal sectional side view of the main part, and d is a partial front view of C as seen from inside the furnace. 11...Anchor brick, 12.Bent/traction hardware, 13...Concave groove, 14...Form board, 1
5... Curved groove, 16... Furnace shell steel plate, 11...
... Fireproof insulation brick, 20 ... Cavity.

Claims (1)

[Claims] 1. In constructing an industrial furnace shell in which a furnace shell and a refractory layer made of monolithic refractories are connected to each other by anchor bricks on the inside of the furnace shell, each layer is connected to the other from the furnace shell side to the core side. The above-mentioned anchor bricks arranged at appropriate intervals are tow-connected to the reactor shell by means of traction hardware that engages with the base of the anchor bricks on the shell side, and the anchor bricks are connected to the core side of the neighboring anchor bricks at an interval in the horizontal direction. A formwork plate is placed across the tip and connected to the tip, the lower surface of the tip of the upper anchor brick is supported by the upper edge of the formwork plate, and the shaped material and the formwork plate are connected to each other. A method for constructing an industrial furnace wall, characterized by filling a monolithic refractory between the walls.