JPH10141865A - End structure of ceiling of industrial furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair without disassembling refractories at an end of a ceiling at the time of partial repairing a sidewall or stacking at an entire surface by supporting the refractories for constituting the end of the ceiling by a bearer mounted at a shell of a furnace, and providing a gap between the ceiling and an upper end of a sidewall. SOLUTION: A bearer 12 is vertically movably mounted at a shell 9 in a predetermined range of a vertical direction. A bolt 14 is inserted into a vertical side 12a of the bearer 12 and a long hole 13 extended vertically at a shell 9. A nut 15 is engaged with the bolt 14 from outside of the shell 9, and the bearer 12 is fixed to the shell 9. A base part of an anchor stud 16 is fixed to the side 12a of the bearer 12 by welding, and a lower surface of a horizontal side 12b of the bearer 12 is brought into contact with an upper end face of a sidewall 8. A ceiling 5 is disposed to be superposed via a gap L on an upper end face of the sidewall 8. Refractories for constituting the end of the ceiling 5 such as, for example, unshaped refractories 18 and expansion absorbers 19 for constituting the end of the ceiling 5 are charged and embedded between the ceiling 5 and the shell 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling end structure of an industrial furnace, and more particularly to a ceiling end structure suitable for use in an incinerator for municipal solid waste.

[0002]

2. Description of the Related Art For example, in an incinerator for municipal solid waste, as shown in a schematic cross-sectional view in FIG. 4 and a schematic cross-sectional view in FIG. It burns while rolling on the stepped bottom 2 of the upper stage which is inclined downward, and then falls down from the end onto the stepped bottom 3 of the lower stage and burns. It falls into the discharge port 4 and is discharged outside the furnace.

The ceiling 5 in such an incinerator has hanging members 7, 7 suspended from a support 6 installed above the furnace.
Are formed by castables which are suspended by burying anchor bricks 7a. A slight gap is provided between the ceiling 5 and the upper ends of the side walls 8, 8. A refractory 10 and an expansion absorbing material 11 which constitute the end of the ceiling 5 are interposed therebetween to absorb the thermal expansion of the ceiling 5.

[0004]

However, in the above-mentioned conventional structure, when the side wall 8 is damaged and the part is repaired or the whole surface is reloaded, the refractory 10 at the end of the ceiling part 5 is not damaged. The side wall 8 needs to be repaired after dismantling the portion including the refractory 10 and the expansion absorbing material 11 which constitute the end of the ceiling portion 5 located at the upper end of the side walls 8, 8. There is a problem that unnecessary construction is increased, brick costs and construction costs are increased, leading to an increase in cost.

[0005]

According to the present invention, the repair work can be performed without dismantling the refractory material at the end of the ceiling portion at the time of the partial repair of the side wall or the whole reloading, and the extra work cost can be saved. It is an object of the present invention to provide an end structure of a ceiling portion of an industrial furnace that can be downed, and as a means for solving the problem, the present invention provides a refractory constituting an end portion of the ceiling portion of a furnace. It is supported by a metal fitting attached to a steel shell, and a required gap is provided between the ceiling and the upper end of the side wall.

[0006] The receiving member can be movably attached to the steel over a required range in the vertical direction, so that the thermal expansion of the side wall can be absorbed. Further, the metal receiving member may be fixed to the inner surface of the steel shell, and a space between at least the lower surface of the horizontal side and the upper end surface of the side wall may be filled with an expansion absorbing material for absorbing thermal expansion of the side wall. .

With the above configuration, even if the side wall is dismantled, the refractory at the end including the expansion absorbing material on the ceiling is supported by the receiving member, so that only the side wall is dismantled and the part is repaired or the entire surface is reloaded. Can be.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows an outline of an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion B in FIG. 1, and the same members as those in FIG. 5 are denoted by the same reference numerals.

This embodiment shows a case in which the metal receiving member 12 is attached to the steel shell 9 so as to be vertically movable over a required range in the vertical direction. The metal receiving member 12 is made of a metal material (angle material) bent at a right angle, and a bolt 14 is inserted into a vertical side 12 a of the metal member 9 and a vertically extending elongated hole 13 perforated in the steel shell 9. A nut 15 is screwed into the metal shell 9 from outside the metal shell 9 to fix the metal shell 12 to the steel shell 9. The elongated hole 13 may be provided on the side of the vertical side 12a of the receiving object 12.

The base of an anchor stud 16 (Y stud) is fixed to the vertical side 12a of the metal receiving member 12 by welding or the like, and the lower surface of the horizontal side 12b of the metal receiving member 12 is in contact with the upper end surface of the side wall 8. It has become. Reference numeral 17 denotes a heat insulating material.

The ceiling portion 5 is positioned so as to overlap the upper end surface of the side wall 8 with a gap L therebetween, and a refractory material constituting an end portion of the ceiling portion 5 between the ceiling portion 5 and the steel shell 9, for example, The irregular-shaped refractory 18 and the expansion-absorbing material 19 are filled to fill the portion. The position where the expansion absorbing material 19 is interposed may be an intermediate position of the irregular refractory 18 or any other appropriate position as long as the thermal expansion of the ceiling part 5 can be absorbed.

When the refractory 18 including the expansion absorbing material 19 constituting the end of the ceiling 5 is applied, the nut 15 is fastened to fix the metal fitting 12 to the steel shell 9 after the completion of the application. Loosen the nut 15. As a result, the receiving object 12 is brought into contact with the upper end of the side wall 8, and the irregular-shaped refractory 18 is supported by the receiving object 12 and fixed as a part of the ceiling 5.

Therefore, even if the side wall 8 is thermally expanded and pushes up the irregular refractory 18, the bolt 14 of the metal receiving member 12 is not
Rises along the long hole 3 and absorbs its thermal expansion. The thermal expansion of the ceiling 5 in the horizontal direction is absorbed by the expansion absorbing material 19 as in the related art.

Even if the side wall 8 is disassembled at the time of the partial repair of the side wall 8 or at the time of the whole reloading, the irregular shaped refractory 18 is supported by the metal fitting 12 by tightening the nut 15, so that it does not fall off. Therefore, only the side wall 8 can be dismantled, and there is no need to perform extra dismantling.

Further, since a gap L is formed between the upper end of the side wall 8 and the lower surface of the ceiling 5, the ceiling 5 is not pushed up even if the side wall 8 thermally expands.
Has no adverse effect on

FIG. 3 is a diagram corresponding to FIG. 2 showing another embodiment.
In this embodiment, the vertical side 20a of the metal receiving member 20 having the inverted L-shaped cross section is fixed to the inner surface of the steel shell 9 by welding or the like,
The irregular-shaped refractory 18 is filled on the horizontal side 20b.
In this case, the expansion absorber 21 is filled between the lower surface of the horizontal side 20b and the upper end surface of the side wall 8 and between the lower surface of the furnace ceiling 5 and the upper end surface of the side wall 8 as needed, thereby absorbing the thermal expansion of the side wall 8. It is made to do. A gap L is formed between the lower surface of the ceiling 5 and the upper end of the side wall 8.

Also in this embodiment, the amorphous refractory 1
Since the support 8 is supported by the horizontal side 20b of the receiving member 20, even if the side wall 8 is disassembled, the irregular-shaped refractory 18 does not fall off, and only the side wall 8 can be repaired. Further, even if the side wall 8 is thermally expanded, it is absorbed by the expansion absorbing material 21 at the upper end, and does not push up the ceiling 5. Expansion absorber 1
9 absorbs the thermal expansion of the ceiling 5 as in the conventional case.

[0019]

As described above, according to the present invention, a refractory such as an irregular refractory constituting an end of a ceiling of a furnace is supported by a metal fitting attached to a steel shell, and the ceiling and a side wall are provided. When the side wall is partially or completely repaired, only the side wall needs to be dismantled, and the refractory at the end of the ceiling can be used semi-permanently. As a result, it is possible to reduce the time required for repair and the amount of repair materials, thereby achieving a significant reduction in cost.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of an end structure of a ceiling portion of an industrial furnace according to the present invention.

FIG. 2 is an enlarged view of a portion B in FIG. 1;

FIG. 3 is a diagram corresponding to FIG. 2, showing another embodiment.

FIG. 4 is a sectional view showing an example of a refuse incinerator which is one of the furnaces to which the present invention is applied.

FIG. 5 is a schematic sectional view taken in the direction of arrow A in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Garbage input port 2, 3 Furnace bottom 4 Discharge port 5 Ceiling 6 Supporting part 7 Hanging tool 8 Side wall 9 Iron shell 10 Refractory 11, 19, 21 Expansion absorber 12, 20 Receiving object 13 Slot 14 Bolt 15 Nut 16 Anchor stud 18 Irregular refractories

Claims (3)

[Claims] In an industrial furnace, a refractory constituting an end portion of a ceiling is supported by a receiving member attached to a steel shell of the furnace.
An end structure of a ceiling portion of an industrial furnace, wherein a required gap is provided between a lower surface of the ceiling portion and an upper end of a side wall. 2. The end structure of a ceiling part of an industrial furnace according to claim 1, wherein said metal receiving member is movably mounted on a steel shell over a required range in a vertical direction, and is capable of absorbing thermal expansion of a side wall. 3. The receiving member is fixed to an inner surface of a steel shell, and at least a space between a lower surface of a horizontal side of the receiving member and an upper end surface of the side wall is filled with an expansion absorbing material for absorbing thermal expansion of the side wall. The end structure of the ceiling part of the industrial furnace according to claim 1.