JPH027432Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is designed to prevent cracks in the structure of the walls of various industrial furnaces that are constructed using castable construction, especially the water pipe walls of general waste incinerators or various boilers. It is an object of the present invention to provide a furnace wall cooling section structure that can prevent the occurrence of such problems and enable stable operation for a long period of time.

BACKGROUND TECHNOLOGY Conventional industrial furnaces, for example, general waste incinerators (hereinafter simply referred to as incinerators), have a structure in which a heat insulating material 2 is installed inside a casing 1 such as a deck plate, as shown in FIG. At the required intervals, water pipes 3 with an inner diameter of about 60 mm and round steel studs 12 with a length of about 40 mm and a diameter of about 10 mm arranged in the shape of a tube are installed on the surface at intervals of about 100 mm, and A furnace wall structure is adopted in which a monolithic refractory material 11 such as castable is constructed to a thickness of 70 to 100 mm by a conventional method on the inside of the furnace of metal fittings connected by fins 4 (steel plates).

8 is a front view showing how the water pipe 3, fin 4 and stud 12 are assembled.

Problems to be solved by the invention In the conventional method as described above, a crack 13 is formed at the tip of the stud 12 of the monolithic refractory layer almost parallel to the furnace wall.
(as shown in Figure 7) occurs, and it is necessary to shut off the fire and repair it every 2 to 3 months, resulting in unstable operation.

Means to Solve the Problems The inventors of the present invention have conducted various studies to solve the deficiencies of the conventional method, and have found that the problem can be solved by proposing and improving the following points: Supports and prevents peeling and falling off.

- Prevents layered quilts parallel to the wall surface.

- Prevents separation of fireproof material from water pipe surface.

- Prevents protrusion due to thermal expansion of supporting hardware.

・The area occupied by the anchor members on the wall surface becomes larger, making it possible to reduce the number of anchors to be installed and saving labor.

- By keeping hardware away from the inside of the furnace, oxidation of hardware can be reduced.

・A screw-in support metal fitting is embedded in the anchor member to create a conical shape with an inverted taper.
(Thermal expansion of the supporting hardware prevents protrusion on both sides of the furnace.) - Extend the anchor member to the furnace wall surface.

- Use chain links to prevent fireproofing material from separating from the water pipe surface.

・L-shaped studs were installed for the purpose of strengthening support.

- Change the height of anchor members, chain links, and L-shaped studs to prevent layer peeling.

Considering the above-mentioned points, we have succeeded in developing the furnace wall structure of the present invention, and the technical configuration of the present invention is as specified in each claim of the above-mentioned utility model registration. Further details will be given based on the drawings.

In Fig. 1, 1 is a casing made of a commercially available deck plate, 2 is a heat insulating material such as ceramic wool, 3 is a steel water pipe arranged vertically, 4 is a fin provided between them, and 5 is a fin. Nuts (preferably so-called high nuts with a length of 20 to 30 mm) are welded to the inside of the furnace at 4 at intervals of 100 to 200 mm, 6 is a well-known chain link fixed vertically to the inside of the furnace of the water tube 3, and 7 is 100~200mm between
These are L-shaped or Y-shaped studs made of steel that protrude at intervals. Reference numeral 8 denotes an anchor member which is a characteristic structure of the present invention, and the mounting bolt 9 is either an integral precast product embedded with well-known silicon carbide castable, or a hole 10 (previously made slightly larger than the mounting bolt 9). It is also possible to use a split-type fired refractory with a dotted line (shown by a dotted line) that is integrated with refractory mortar and the mounting bolts 9 are fixed to it. It is necessary to become. The best shape is a truncated cone, but a truncated pyramid shape is also acceptable. The angle between the bottom surface and the slope is preferably about 75° to 85°. This is because if it is less than 75 degrees, so-called corner chips may occur during manufacturing, and it is easy to break during operation.
This is because if the angle exceeds 85°, the ability to lock castables etc. will be reduced.

During construction, the worker attaches the bolt 9 of the anchor member 8 to the nut 5 fixed to the fin 4 in advance.
Just screw it in to the required position (installation thickness).
Next, a construction frame (not shown) is attached to the inside of the anchor member 8, and a monolithic refractory material 11 such as well-known castable or pouring material is filled between the fins 4 and the water pipe 3 and the anchor member 8 by a standard method.
Alternatively, it can be sprayed.

Furthermore, as shown in FIG. 2, if the nut 5 is welded directly to the water pipe 3, and the anchor member 8 is attached in the same manner as described above, the cooling effect of the nut 5 and the bolt 9 is improved, and even thicker Furnace walls can be constructed.

3 to 6 are schematic diagrams showing an example in which the present invention is applied to a furnace wall having a cooling box 3.

In these drawings, 3 is a cooling box made of commercially available steel plate.

20 is a fluid such as water or air, 5 is a nut welded at an interval of 100 to 300 mm on the inside of the furnace of the cooling box 3, and 7 is a fluid such as water or air.
are vertically fixed Vs on both sides of the cooling box 3 inside the furnace.
It is a letter-shaped or Y-shaped metal stud. Note that, if necessary, a well-known steel chain link 6 shown in FIG. 6 can also be used.

8 is an anchor member of the present invention, and the support bolt 9 is a well-known monolithic refractory (such as castable).
It is also possible to use a pre-cast product buried in a pre-cast product, or a two-piece regular brick in which a hole 10 slightly larger than the support bolt 9 (indicated by a dotted line) is made in advance, and the support bolt 9 is clamped and fixed with a fire-resistant adhesive. It is also necessary that its horizontal cross section be inverted tapered (trapezoidal). The best shape is a truncated cone, but a truncated pyramid shape is also acceptable. In addition,
The angle between the bottom and the slope is 75° to 85°.

As in the case of Figures 1 and 2 above, 75°~
The angle is approximately 85°, and the construction methods are almost the same as described above.

Effects of the invention (1) It is possible to provide support up to the surface layer of the wall, making it possible to prevent peeling off of the surface layer and parallel cracking.

(2) Since the supporting area can be widened, the installation pitch of the anchor member can be expanded, and the work of installing the nut can be reduced, resulting in labor saving.

(3) Bolts can be kept away from the inner surface of the furnace, reducing oxidation of metal objects.

(4) Bolts can be prevented from protruding to both sides of the furnace due to thermal expansion, eliminating surface peeling.

(5) Since the mounting area of the nut is small, it can be installed on narrow, curved, uneven surfaces, etc.

(6) The effort required to install nuts and construction is greatly reduced.

(7) Since it is fixed using a screw-in method, the anchor member does not move during spraying or pouring construction, resulting in a stable structure.

(8) Since it is a screw-in type, the wall thickness can be adjusted, and it also eliminates the need to weld metal parts during repairs.

[Brief explanation of the drawing]

Figure 1 shows the reactor wall cooling structure of the present invention, which is equipped with water pipes.
Fig. 2 is a horizontal sectional view showing an example, Fig. 2 is a horizontal sectional view showing another specific example, Figs. - A cross-sectional view along line A, Figure 4 is a front view seen from the B side (furnace inside) in Figure 3, Figure 7 is a horizontal cross-sectional view of the conventional method, and Figure 8
The figure is an assembly diagram of the water pipe, fins, and studs. In the diagram: 1...Casing, 2...Insulation material, 3...
...Water pipe or cooling box, 4...Fin, 5...Nut, 6...Chain link, 7 and 12...Stud, 8...Anchor member, 9...Mounting bolt, 10...Hole, 11... Monolithic refractories, 13...
…crack.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An anchor member 8 made of precast or regular brick with a trapezoidal longitudinal section, in which a mounting bolt 9 is embedded, is attached to a nut 5 fixed to a cooling box or water pipe 3 as described above. Screw together and fix with the mounting bolt 9,
A furnace wall cooling section structure for an industrial kiln, characterized in that the lower bottom surface of the anchor member 8 is aligned with the inner surface of the furnace wall, and the other furnace wall portion is buried with a monolithic refractory 11. (2) Connect the cooling box or water pipe 3 with fins 4,
2. A furnace wall cooling part structure for an industrial kiln according to claim 1, wherein said fins (4) are provided with nuts (5) for fixing said anchor member (8). (3) The furnace wall cooling part structure of an industrial kiln according to claim 1 or 2, wherein the anchor member 8 is integral or divided. (4) Claim 1, wherein a chain link and/or a metal stud 7 is fixed to the cooling box or water pipe 3.
Furnace wall cooling part structure of the industrial kiln according to 2 or 3.