JPS5921980A - Method of constructing furnace wall body and its furnace wall body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a furnace wall of an industrial furnace such as a scorching furnace, a heating furnace, a heat treatment furnace, etc., and an improvement of the furnace wall.

Conventionally, as a furnace wall construction method for the above-mentioned industrial furnaces, a blanket made of heat-resistant inorganic fibers such as ceramic fibers, alumina fibers, and silica fibers is formed into a plate of a required thickness, and the iron shell, which is the furnace wall body, is A support metal fitting is fixed by welding to the inner surface of the steel shell, and the fiber blanket is supported by nine rods with the end face in the thickness direction facing the steel skin surface. A construction method has been proposed in which the material is held in place by penetrating it in the shape of a skewer, but
This construction method involves cutting and assembling the fiber blanket to specified dimensions at the construction site.
The disadvantage is that construction is extremely complicated.

In addition, as another construction method, a construction method has been proposed in which a large number of fiber blankets are arranged and fixed in advance to a substrate formed of a heat insulating material in an upright manner to form a blanket block, and the substrate is fixed to an iron shell. There is. According to this construction method,
Complicated work such as cutting and piercing the fiber blanket at the work site can be omitted, but since the fiber blanket block has a substrate, the overall weight increases accordingly, making the work of installing the block difficult and the furnace There are disadvantages such as the weight of the wall becomes heavier.

As described above, the present invention is a method of constructing a furnace wall by lining an iron shell with a fiber blanket, which allows the lining of the fiber blanket to be easily and easily constructed, and the furnace wall can be constructed to be lightweight. The purpose of this invention is to provide a wall construction method and a furnace wall.

The method for constructing a furnace wall body according to the present invention uses a support fitting in which a cylindrical part and a skewer part are connected in a cross-shaped manner, and the skewer member of this support part is provided with a pressing spring member. A large number of inorganic fiber blankets formed into plate shapes are sequentially penetrated and layered and compressed, and then bound and held with binding material to form a blanket laminated block.Meanwhile, the iron shell of the furnace has a hook-shaped tip. By welding and fixing the stud fittings of the block, and pressing the blanket laminated block with the blanket laminated surface facing perpendicular to the steel shell, the studs on the steel shell side are attached to the cylindrical member sandwiched between the blankets of the block. The metal fitting is inserted through the stud metal fitting, and the tip hook portion of the stud metal fitting is engaged with the cylindrical opening of the cylindrical member together with the pressing spring material to prevent the cylindrical member from coming out from the stud metal fitting. This feature is characterized in that the fiber blanket laminated block is held by the stud metal fittings on the steel skin side via the supporting metal fittings.

Further, in the furnace wall body according to the present invention, a large number of inorganic fibers formed in a plate shape are attached to a skewer member of a support fitting in which a cylindrical member provided with a pressing spring material and a skewer member are connected in a cross-shaped manner. The woven blanket laminated block, which is made by laminating and compressing the blanket through the blanket, is positioned inside the steel shell of the furnace with the plunket laminated surface facing perpendicular to the steel shell, and is sandwiched between the blankets of the block. A stud metal fitting welded and fixed to the iron skin side is inserted into the cylindrical member, and a hook portion formed at the tip of the stud metal fitting,
The pressing spring material is engaged with the cylindrical opening of the cylindrical member,
The structure is characterized in that the cylindrical member and the stud fitting are combined so that the cylindrical member does not come out from the stud fitting.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing embodiments thereof.

In Figures 1 and 2, (A) is a fiber blanket laminated block used for constructing furnace walls, which is made of heat-resistant inorganic fibers such as ceramic fibers, alumina fibers, and silica fibers in the form of plates. A support metal fitting (B
) has a laminated and compressed structure.

That is, the support fitting (B) includes a cylindrical member (2) with a square cross section, and a skewer member (3) welded orthogonally to the cylindrical member (2).
and a chevron-shaped spring plate part (4) attached inside the cylindrical member, and one corner of the cylindrical part (2) is provided with a spring plate from the cylindrical mouth end for the purpose to be described later. A crack (5) of a required length is provided, and the inorganic fiber blanket (
In 1), the skewer member (3) is pierced in order so that the opening of the cylindrical member with the crack (5) slightly protrudes outside the block, and the corrugated board, plastic plate, etc. Place a U-shaped backing plate (6) made of a material such as a board, and cover the whole area with paper or plastic tape (
By tightly binding and uniformly compressing in step 7), a compressed fiber blanket laminated block is constructed.

The block formed by laminating a large number of fiber blankets (1) is suitably about 300 mm thick from the viewpoint of workability and handling, and the thickness varies depending on the operating temperature of the furnace, but is 100 mm to 300 mm thick. degree is preferred. Also, the density of the block prisoner is 0.17 g/cm3~0.25,! i
It is preferable to use a fiber funket having a density of about 0.1217/crn' and compressed by 30% to 50% in the lamination direction.

As shown in FIGS. 3 to 5, the fiber blanket laminated block (A) has stud metal fittings (C) welded and fixed to the furnace shell (8), support metal fittings (B) on the side of the dowel block,
) is held on the inner surface of the iron shell. The holding stud metal fittings (C) are band plates (8), (9),,!
= bent into an L shape, one strip (8) is longer than the other strip (9), and a hook portion (8a) is provided at the tip of the protruding side.
A pin insertion hole (8b), which will be described later, is provided at the required part of the plate.As shown in Fig. 4, the stud metal fitting (C) is When the metal fitting (B) is inserted into the cylindrical member (2), the hook portion (8a) of the band plate (8) of the stud metal fitting is inserted into the cylindrical member (2) by the spring plate member (4) at the end of insertion. The cylindrical member (2) is hooked onto the rim of the cylinder opening, thereby causing the cylindrical member (2) to attach to the stud fitting (
C) is held so that it does not come out, and the stud fitting (C1 band plate (9) is attached to the tubular member (2
) is inserted into the crack (5) at the corner of the corner,
If the strip (9) and the crack (5) do not match, it will be impossible to insert the stud fitting (C
) and the cylindrical member (2) are regulated.

To construct a furnace wall using the fiber blanket laminated block (4) described above, as shown in Figure 5, first fix the iron skin αOK stud fittings (C) of the furnace by welding, and then attach the ceramic fiber , a blanket αυ made of inorganic fibers such as glass fiber and rock wool formed into a plate shape was laminated together as a backup insulation material, and inserted into the pin hole (8b) drilled in the band plate (8) of the stud fitting (c). Hold it down with a long pin (not shown), then position the blanket S-layer block (A) so that the blanket laminated surface faces perpendicular to the steel shell, and attach the support bracket (B).
The block member is pressed so that the stud fitting (C) is inserted into the cylindrical member (2), and the cylindrical member (2) is
As shown in FIG. 4, the stud fitting (C) is firmly held so that it does not come out. Therefore, by such construction, by sequentially arranging and attaching the blocks, it is possible to form a wall lined with the iron shell of the furnace.

After the installation of the blocks is completed, the tape (7) is cut and removed, and the backing plate (6) is removed. Due to the restoring force of the compressed fiber blanket (1), the joints between the blocks are closed. Completely sealed, creating a block-lined wall with no gaps.

In addition, when attaching the blanket laminated blocks (4) next to each other, as shown in Fig. 6, if the blocks are arranged so that the blanket laminated surfaces of the adjacent blocks (4) are perpendicular to each other, the fiber blanket Effective in preventing the joints between blocks from expanding due to heat shrinkage.

In addition, in the above construction example, after the block is removed, the tape is cut and removed, and the backing plate is removed.
If these members are made of combustible materials such as paper or synthetic resin, they can be burned away by the high heat generated during operation of the furnace, so there is no need to remove them.

However, when constructing the furnace wall body mentioned above, the lining material of the steel shell is made of 4-fire insulation fiber blanket laminated blocks, so the lining construction can be done by simply piling up the blocks or fitting them together. The construction is extremely simple compared to conventional lining construction, which involves cutting fiber blankets to predetermined dimensions and assembling them at the work site.

In addition, the supporting metal fittings used to hold the blanket laminated blocks are buried within the blocks and are not exposed on the surface side, so there is no risk of high-temperature corrosion due to heat. Since it is possible to use ordinary metal materials, the material cost of the support fittings can be greatly reduced.

In addition, since the blanket laminated block located on the hot side is positioned with the blanket laminated surface facing perpendicular to the steel shell, the mechanical strength of the block surface is strong.
Excellent wind speed and vibration resistance. In particular, even if ceramic fibers are used for fibers, the effect of crystallization of ceramic fibers at high temperatures is limited to near the surface, and cracks and peeling are unlikely to occur.

In addition, when the binding material is removed from the blanket laminated block,
Due to the restoring force of the compressed blanket, the joints between the blocks are completely closed, and a suitable joint material is applied to easily form a block lining wall with no gaps.
The prevention of hot gas leakage can be further strengthened.

In addition, we do not use a board to fix a large number of blankets, but instead fix the blocks with a skewer inserted through the blanket and a cylindrical member connected to it. The blocks can be easily installed and the furnace wall can be made lightweight. In addition, even after construction, block units can be replaced, so
Easy to repair.

As described above, according to the present invention, in the method of constructing a furnace wall by lining the iron skin of a furnace with an inorganic fiber blanket formed in a plate shape, a skewer member and a cylindrical member are used. Using supporting metal fittings connected in a crisscross pattern, a large number of inorganic fiber blankets are pierced through the skewer member to be laminated and compressed, bound and held with binding material to form a blanket laminated block, and this block is attached to its laminated surface. When the bolt is pressed against the steel shell side in a direction perpendicular to the steel shell, a hook-shaped nut fitting fixed to the steel shell side is inserted into the cylindrical member, whereby the cylindrical member is pulled out from the stud metal fitting. Since it is self-locking to prevent any damage, it can greatly improve the progress of furnace wall construction work compared to conventional construction methods.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a fiber blanket laminated block used in the furnace wall construction work of the present invention, Fig. 2 is a perspective view of a support fitting, and Fig. 3 is a perspective view of a stud fitting attached to the steel shell side. FIG. 4 is a perspective view of the combined state of both tools, FIG. 5 is a sectional view of the furnace wall lined with 872 layers of fiber blanket blocks, and FIG. 6 is an explanatory view showing the arrangement of the blocks. (5)...Fiber blanket laminated block, (1)...
...Fiber blanket, (B)...Supporting metal fittings, (2)
... Cylindrical member, (3) ... Tape binding material, (4)
...Spring plate member, (5)...Crack, (6)...Plate, (7)...Tape, (C)...Stud fitting, (8) (9)... Band plate, (8a)... hook part,
(8b)...Pin insertion hole, α1...Furnace iron shell, true...
...Fiber blanket for backup insulation. Figure 1 Δ Figure 2 Figure 3 141

Claims (2)

[Claims] (1) A large number of plate-shaped delicate inorganic blankets are sequentially pierced through the skewer member of the support fitting, which is formed by connecting a cylindrical member equipped with a pressing spring material and a skewer member in a cross-shaped manner. The blanket laminate blocks are laminated and compressed and held together with binding materials to form a blanket laminate block.Meanwhile, stud metal fittings with hook-shaped tips are welded and fixed to the iron skin of the furnace, and the blanket laminate blocks are bonded and held together with binding materials. By pressing with the surface facing perpendicular to the steel shell, the stud metal fitting on the steel skin side is inserted into the cylindrical member sandwiched between the blankets of the block, and by this insertion, the tip hook portion of the stud metal fitting is The cylindrical member is engaged with the cylindrical opening of the cylindrical member in cooperation with the pressing spring material to prevent the cylindrical member from coming out from the stud fitting, and the multi-fiber blanket laminated block is attached to the stud fitting on the steel skin side via the support fitting. A method of constructing a furnace wall body, which is characterized by maintaining the furnace wall body. (2) A large number of plate-shaped inorganic fibers are pierced through the skewer member of the support fitting, which is formed by connecting a cylindrical member equipped with a pressing spring material and a skewer member in a cross-shaped manner. A compressed fiber blanket laminated block is positioned inside the furnace shell with the blanket laminated surface facing perpendicular to the steel shell, and the steel shell is placed on the cylindrical member sandwiched between the blankets of the blocks. A stud metal fitting welded to the side is inserted, and a hook portion formed at the tip of the stud metal fitting is pressed by a pressing spring material.
A furnace wall body characterized in that a cylindrical member and a stud fitting are combined so that the cylindrical member is engaged with the cylindrical opening of the cylindrical member and the cylindrical member is not pulled out from the stud fitting.