JP2001324104A - Furnace water pipe protective structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a furnace water pipe protective structure, in which no force act between the crest sections of refractory heat-resistant blocks and thin-film sections, and accordingly, the crest sections are not broken. SOLUTION: This furnace water pipe protective structure has a plurality of water pipes 101, 102, etc., laid in a furnace, thin-film sections 109 connecting adjacent water pipes 101 and 102 to each other, bolts 110 fixed to the thin-film sections 109, and refractory heat-resistant blocks 103 supported by the side sections 117 of the shafts of the bolts 110 or nuts 112 screwed on the bolts 110. In the structure, gaps 113 and 114 are respectively formed between the thin-film sections 109 and water pipes 101 and 102, and between the blocks 103 and pipes 101 and 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-furnace water pipe protection structure having a fire-resistant and heat-resistant structure for protecting a water pipe disposed inside a furnace such as an incinerator.

[0002]

2. Description of the Related Art Various structures are known for protecting a water pipe disposed inside a furnace such as an incinerator.

[0003] As such a structure, Japanese Patent No. 29861 is disclosed.
A water-cooled wall tube block structure disclosed in Japanese Patent Publication No. 97 is known. As shown in FIG. 5, this is a fire-resistant block 3 (hereinafter referred to as a heat-resistant block 3) for protecting a water pipe structure composed of a plurality of water pipes 1, 1 arranged side by side and a thin film section 2 connecting the adjacent water pipes 1, 1. , Simply referred to as a block), and two semicircular arc-shaped grooves 4, 4 are formed on one surface of the block 3 according to the shape of the water pipe 1. Further, the peak 5 is raised to the center of the block 3 which is in contact with the thin film portion 2 and between the grooves 4, 4, so that the block 3 contacts the thin film portion 2 at the top 6 of the peak 5. There is a structure to fix it. Therefore, in this structure, the water pipe 1
And the block 3 do not directly contact each other.

Therefore, according to this structure, the temperature of the water flowing through the water pipe 1 becomes high and the water pipe 1 does not directly contact the block 3 even if the water pipe 1 thermally expands. The problem of the block 1 being damaged is solved.

[0005]

In the above-described block structure, the block 3 is bolted at the peak 5 by a bolt or the like.
Are fixed to the thin film portion 2. In recent years, from the viewpoint of effective use of energy, a structure in which water pipes are densely arranged has been tending to be adopted so that thermal energy generated in a furnace can be used with higher efficiency.

[0006] In such a structure, the interval between adjacent water tubes 1 is reduced. More specifically, the mountain 5 on the block 3 side
Is steeper, and the top 6 is also narrower. Then, the strength of the ridge 5 decreases, and the ridge 5 is bolted.
In the case where is fixed to the thin film portion 2, there is a problem that the peak portion 5 is damaged.

Further, the blocks 3 are arranged on the inner wall of the furnace in the unit of several thousands, but it is necessary to finely adjust the fixed state after the mounting work in order to secure the flatness in a state where many are arranged. . At this time, if the crest 5 is steep and the crest 6 has a narrow width, an excessive force is applied to the vicinity of the crest 6 of the crest 5 at the time of fine adjustment. There is a problem.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a water pipe protection in which a force is not exerted between a peak portion and a thin film portion and the peak portion is prevented from being damaged. It is to provide a structure.

[0009]

According to the present invention, there is provided a structure for fixing a refractory heat-resistant block (hereinafter, simply referred to as a block) to a thin film portion. There is a structure that does not exert force. In other words, by adopting a structure in which the load of the block is applied to the shaft side portion of the bolt fixed to the thin film portion or a nut screwed to the bolt, the structure is such that the peak portion of the block is not pressed against the thin film portion. is there.

[0010] For example, a fireproof heat-resistant block is hooked on a nut screwed to a bolt, such as a stud bolt, which is hung down and fixed on a ceiling wall portion arranged on the ceiling, so that the bolt is inserted through the bolt. The fire-resistant block can be arranged so as to be suspended. In this case, since the block is not pressed against the thin-film portion on the water tube side, the above-described problem in which the peak portion of the block is damaged is avoided.

That is, a first invention of the present invention is directed to a first aspect of the present invention, wherein a plurality of water tubes are disposed in a furnace, a thin film portion connecting adjacent water tubes, a bolt fixed to the thin film portion, and a shaft side of the bolt. And a fire-resistant heat-resistant block supported by a nut screwed to a portion or a bolt, and a gap is provided between the fire-resistant heat-resistant block, the water pipe and the thin film portion.

According to a second aspect of the present invention, the cross-sectional shape of the refractory heat-resistant block has a semicircular groove for holding the water pipe, and a crest opposed to a thin film for connecting adjacent water pipes. A third invention is characterized in that a fire-resistant cushioning material is provided between the top of the crest and the thin film portion, wherein the tip portion of the bolt is fixed to the thin film portion. It is characterized by being filled.

A fourth invention is characterized in that a ceramic cap is fitted to the bolt and the nut, and the cap is coated with an oxide film or a silica material.

[0014]

According to the first aspect of the present invention, no force is exerted between the ridge and the thin film, and the ridge can be prevented from being damaged. According to the second aspect of the present invention, damage to the crest and fine adjustment of the position can be easily performed when the block is fixed, and damage to the crest can be prevented during the fine adjustment.

According to the third aspect of the present invention, by disposing the fire-resistant cushioning material in the gap between the top of the peak and the thin film, the block can be maintained while maintaining the structure in which the peak is not damaged. It can be fixed securely. Further, according to the fourth aspect, the corrosion resistance can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view from the front side of a refractory block used in the present invention, and FIG. 2 is an explanatory sectional view showing a first embodiment of a protective structure according to the present invention.

In the figure, water pipes 101 and 102 and a fire-resistant block 1 for protecting the water pipes 101 and 102 are shown.
03 (hereinafter, simply referred to as a block),
FIG. 2 shows a ceiling wall portion inside the furnace.

The block 103 has a water pipe 10 on its surface.
There are grooves 104 and 105 having a semi-circular cross-sectional shape capable of holding the grooves 1 and 102, and a crest 106 between the grooves 104 and 105. In the illustration, this peak 106
Extends to both ends, but does not have to extend to both ends, and may be interrupted halfway. Further, a bolt hole 107 communicating with the front and back surfaces is formed in the center of the peak portion 106, and a large-diameter concave portion 108 is provided on the back surface side. The concave portion 108 has an arbitrary shape such as a circular shape or a square shape.

The block 103 is connected to the water pipe 10.
At the thin film portion 109 connecting the first and the second portions 102, the tip portion is attached to a bolt 110 such as a stud bolt fixed by welding or the like through a bolt hole 108 of the peak portion 106 in a suspended state.

That is, the bolt 110 is inserted into the bolt hole 107 of the block 103 as described above,
10 is fixed to the thin film portion 109 by welding or the like, and a washer 111 is attached to the base end side of the bolt 110.
By screwing the nut 112 with
The bolt 110 has a structure in which a load of the block 103 is applied via a washer 111.

According to this structure, the peak portion 106 and the thin film portion 1
09 is not in direct contact, and the gap 113 is formed. Therefore, no force is applied between the two and no large force is applied to the peak portion 106. Water pipe 1
A gap 114 is also formed between 01 and 102 and the block 103. The voids 113 and 114 are filled with a refractory mortar 115 having a certain degree of flexibility.

A ceramic cap 120 is fitted in the recess 108 so as to cover the nut 112, and a gap between the recess 108 and the cap 120 is filled with a refractory mortar 121. This cap 12
0 has the function of preventing the bolt 110 from being corroded by exposure to a flame, molten slag, or other corrosive high-temperature gas. Note that the cap 120 is made of the same material as the block 103.

An oxide film formed by a thermal oxidation method is formed on the surface of the cap 120 to improve the corrosion resistance. In this thermal oxidation method, one sample is sampled in air.
By heating at about 300 ° C., an oxide film is formed on the surface. A similar effect can be obtained by applying colloidal silica, silicon soda, or ethyl silicate to the surface in addition to forming the oxide film. Further, even if the same processing is performed on the entire surface of the block 103 other than the cap 120, the corrosion resistance can be improved.

As described above, the plurality of water tubes 101, 102,
Are arranged inside the furnace by the blocks 103, 103, so that the water pipe protection structure of the ceiling wall portion can be created. In the structure of this embodiment, the hot gas inside the furnace is
A structure in which the water pipes 101 and 102 are protected from the atmosphere in the furnace without directly touching 102 is realized.

Moreover, in this structure, since the force is not concentrated on the top portion 116 of the peak portion 106, the above-described problem can be suppressed. Therefore, the peak 106
However, even if the width of the top 116 is narrow,
6 can be prevented from being damaged. Especially in this structure, the peak 10
Since the top 116 of 6 does not need to be flat,
There is an advantage that the width of the top portion 116 of the 06 can be made as small as possible. That is, in this structure, the thin film portion 2 is brought into contact with the top 6 of the crest portion 5 as in the conventional example described above,
This is because the structure is not fixed with bolts or the like.

In this structure, the water pipes 101, 1
, And the thin film portion 109 are preferably made of a steel pipe or a steel plate, and the block 103 is preferably made of a silicon nitride ceramic.

FIG. 3 is an explanatory sectional view showing a second embodiment of the protection structure according to the present invention. This structure is an example showing a vertical wall portion inside the furnace, and blocks 103 are fixed to water tubes 101, 102,... Arranged vertically as shown in FIG. It is arranged vertically in a suspended state. If the other configuration is the same as that of FIG. 2, the description will be omitted.

In this structure, as described above, block 1
03 is vertically suspended via the bolts 110, so that the load of the block 103 is only concentrated on the shaft side 117 of the bolts 110. For this reason, the tip of the bolt 110 has a thin film portion 10.
9, the ridge 106 can be prevented from being damaged even if the top 116 is narrow.

FIG. 4 is an explanatory sectional view showing a third embodiment of the protection structure according to the present invention. This structure is an example showing a ceiling wall portion and a vertical wall portion inside the furnace. As shown in the drawing, a heat-resistant cushion material 1 is inserted into a gap 113 formed between a peak portion 106 and a thin film portion 109 of a block 103.
This is an example in which 18 is filled. Examples of the heat-resistant cushion material 118 include ceramic fibrous materials such as ceramic paper and rock wool.
Other configurations are the same as those in FIG.

In this structure, the peak 10 of the block 103 is
6 are protected by the cushion material 118, and the water pipes 101 and 102 and the block 103 are protected by their cushioning properties.
Since the backlash is eliminated, the block 103 can be fixed without backlash. And the mountain 1
06 can be prevented from being subjected to excessive force. Further, durability against vibration can be improved.

Further, a material having a cushioning property may be provided in combination with this embodiment or separately from this embodiment so as to overlap the washer 111 or the washer 111. Further, the washer 111 itself may be made of a material having a cushioning property. With this configuration, it is possible to increase the durability of the block 103 against rattling and vibration.

[0032]

By adopting the present invention, the structure is such that no excessive force is applied to the ridge of the block, and the ridge is not damaged. Also, by filling the gap between the top of the mountain and the thin film with a fire-resistant cushioning material,
The damage to the ridge can be prevented, and the block can be securely fixed.

Furthermore, damage to the crests of the block when the block is fixed can be prevented, so that the position of the block at the time of installation and fine adjustment of the position are easy, and the crest at the time of position adjustment and fine adjustment is easy. The damage of the part can be prevented. In addition, by providing an oxide film on the surface of the cap, effects such as improvement of corrosion resistance can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refractory block used in the present invention as viewed from the front side.

FIG. 2 is an explanatory sectional view showing a first embodiment of the protection structure according to the present invention.

FIG. 3 is an explanatory cross-sectional view showing a second embodiment of the protection structure according to the present invention.

FIG. 4 is an explanatory sectional view showing a third embodiment of the protection structure according to the present invention.

FIG. 5 is an explanatory sectional view of a conventional example.

[Explanation of symbols]

 101, 102 Water pipe 103 Fireproof heat-resistant block 109 Thin film part 110 Bolt 112 Nut 113, 114 Air gap 117 Bolt shaft side

Claims (4)

[Claims] 1. A plurality of water tubes arranged in a furnace, a thin film portion connecting adjacent water tubes, a bolt fixed to the thin film portion, and a nut screwed to a shaft side portion or the bolt of the bolt. A water pipe protection structure in a furnace, comprising: a fire-resistant heat-resistant block supported by the water-resistant block; and a gap provided between the fire-resistant heat-resistant block, the water pipe, and the thin film portion. 2. A cross-sectional shape of the refractory heat-resistant block has a semicircular groove for holding a water pipe, and a crest facing a thin film part for connecting adjacent water pipes, wherein the bolt has a bolt hole in the crest. 2. The in-furnace water pipe protection structure according to claim 1, wherein a tip end portion of the bolt is fixed to the thin film portion. 3. 3. The in-furnace water pipe protection structure according to claim 1, wherein a refractory cushion material is filled between the top of the mountain portion and the thin film portion. 4. The bolt and the nut are fitted with a ceramic cap, and the cap is coated with an oxide film or a silica material. Water tube protection structure in the furnace.