JP2020003105A - Chimney and lining member of the same - Google Patents

Abstract

To decrease or eliminate irregularity of heat deformation of a lining member in a chimney having a polygonal shape such as a square.SOLUTION: A lining member 30 having a polygonal cylinder shape is provided at an inner periphery of a chimney body 10, having a polygonal cross section, of a chimney 1. A first lining corner part 33 of the lining member 30 faces a chimney corner part 13 of the chimney body 10. A first inner angle θ3 of the first lining corner part 33 is set larger than an inner angle θ3 of the chimney corner part 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chimney, and more particularly to a chimney in which a lining member is provided on an inner periphery of a chimney main body.

  For example, the chimney of Patent Literature 1 has a lining member provided on the inner periphery of a steel chimney main body. The inside of the lining member is a flue. Even if exfoliated substances such as rust are released from the inner peripheral surface of the chimney main body, by covering the inner periphery of the chimney main body with the lining member, the exfoliated substances pass through the flue together with exhaust gas to the atmosphere. Scattering is prevented.

The chimney body in Patent Document 1 is cylindrical, and the lining member is also cylindrical. When heated, the cylindrical lining member can be uniformly expanded and deformed over the entire circumference in the circumferential direction.
Chimneys with polygonal cross-sections such as quadrilaterals are also known.

JP 08-210622 A

A chimney with a circular cross section creates a large dead space around it. The larger the size, the larger the dead space.
On the other hand, if the chimney has a square cross section, for example, the dead space can be reduced. Preferably, a quadrangular section lining member is provided on the inner periphery of the square section chimney main body, so that the exfoliation from the inner peripheral surface of the chimney body can be prevented as in the case of the cylindrical chimney of Patent Document 1. . On the other hand, when the lining member having a square cross section is heated, it is deformed more irregularly than in the case of a circular cross section. Depending on the method of thermal deformation, the exhaust gas not only passes through the inside of the lining member but also passes between the inner peripheral surface of the chimney main body and the lining member, so that exfoliated substances from the inner peripheral surface of the chimney main body are removed. There is a risk of being released into the atmosphere together with the exhaust gas. In addition, the exhaust gas comes into contact with the chimney main body, which may cause damage and deterioration of the chimney main body.
In view of such circumstances, the present invention reduces or eliminates irregularities in the thermal deformation mode of the lining member in a polygonal chimney such as a quadrangle, so that thermal deformation occurs in a desired direction, and thus the peeling. The purpose of the present invention is to prevent emission of objects and damage and deterioration of the chimney main body.

In order to solve the above problems, a chimney according to the present invention includes a chimney main body having a polygonal cross section, and a lining member provided on an inner periphery of the chimney main body,
The inner lining member is formed in a polygonal cylindrical shape having a larger number of angles than the chimney main body, and the inner angle of the first lining angle portion of the lining member facing the chimney angle portion of one of the chimney main bodies is It is characterized by being larger than the inner angle of the chimney corner.
Thereby, the irregularity of the thermal deformation mode of the lining member can be reduced.
Since “the inner angle of the chimney corner <the inner angle of the first lining corner”, the first lining corner is arranged away from the chimney corner to the inside of the chimney.
Preferably, the number of corners of the lining member is twice the number of corners of the chimney body. For example, in a chimney body having a rectangular cross section, the lining member preferably has an octagonal cross section.

It is preferable that a second lining corner portion of the lining member that is circumferentially adjacent to the first lining corner portion is opposed to an intermediate portion of an inner wall surface of a chimney wall plate of the chimney main body.
In other words, it is preferable that a portion of the lining member facing the intermediate portion of the inner wall surface of the chimney main body is bent to form a second lining corner portion. Thereby, for example, it is possible to cause a thermal deformation mode in which the first lining corner portion approaches and separates from the chimney corner portion, and the second lining corner portion approaches and separates from the chimney wall plate. .
The chimney main body has the same number of chimney wall panels as the number of corners of the chimney main body, and these chimney wall panels are assembled in an annular shape, and adjacent chimney wall panels intersect to form a chimney corner. preferable. Each chimney wall plate is preferably flat.

  It is preferable that the inner angle of the first lining angle is smaller than the inner angle of the second lining angle. That is, it is preferable that the inner angle of the second inner corner is closer to 180 ° than the inner angle of the first inner corner. Thereby, irregularities in the thermal deformation mode of the lining member can be reliably alleviated.

  It is preferable that the first lining corner is released from the chimney corner, and the second lining corner is restrained by the chimney wall plate. By doing so, at the time of thermal deformation of the lining member, the first lining corner is moved closer to and away from the chimney corner, and the angle of the first lining corner is expanded or contracted.

  The first lining corner may be restrained by the chimney corner, and the second lining corner may be released from the chimney wall plate. In this case, at the time of thermal deformation of the lining member, the second lining corner is moved toward and away from the chimney wall plate, and the angle of the second lining corner is enlarged or reduced.

It is preferable that the lining member has a seamless polygonal cylinder shape or a semi-seamless polygonal cylinder shape having a seamless weld.
Thus, it is possible to prevent the exhaust gas from passing through the joint (seam portion) of the lining member and entering between the chimney main body and the lining member. Therefore, damage and deterioration of the chimney main body due to contact with the exhaust gas can be more reliably prevented.

It is preferable that the chimney wall plate of the chimney main body contains calcium silicate as a component.
A powdery exfoliated substance containing calcium silicate can be released from the chimney wall plate. On the other hand, by covering the inner periphery of the chimney main body with the lining member, it is possible to prevent the powdery exfoliated material from being scattered into the atmosphere together with the exhaust gas. Furthermore, if the lining member has a seamless structure or a semi-seamless structure, for example, high-temperature and high-humidity exhaust gas can be reliably prevented from coming into contact with the calcium silicate chimney wall plate, and the calcium silicate chimney wall plate is surely damaged. Can be prevented.

The chimney lining member according to the present invention is a lining member provided on the inner periphery of the chimney body having a polygonal cross section,
The interior angle of the first lining angle portion, which is formed in a polygonal cylindrical shape having a larger number of corners than the chimney body and faces the one chimney angle portion of the chimney body, is larger than the interior angle of the chimney angle portion. And

  ADVANTAGE OF THE INVENTION According to this invention, in the chimney of polygons, such as a square, the irregularity of the thermal deformation of a lining member can be eased or eliminated, and a thermal deformation can be caused in a desired direction. Therefore, it is possible to prevent exhaust gas from entering between the chimney main body and the lining member due to irregular deformation of the lining member. Consequently, it is possible to prevent the exfoliated matter from the inner peripheral surface of the chimney main body from being released into the atmosphere together with the exhaust gas. Further, the exhaust gas can be prevented from contacting and being absorbed by the chimney main body, and damage and deterioration of the chimney main body can be suppressed.

FIG. 1 is a front view of a chimney according to the first embodiment of the present invention. FIG. 2 is a plan sectional view of the chimney, taken along line II-II of FIG. FIG. 3 is a perspective view of the chimney lining member. FIG. 4 is a plan sectional view showing a part of the chimney in a state where the lining member is thermally deformed. FIG. 5 is a plan sectional view of a chimney according to the second embodiment of the present invention. FIG. 6 is a cross-sectional plan view showing a part of the chimney according to the second embodiment in a state where the lining member is thermally deformed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First embodiment>
1 to 4 show a first embodiment of the present invention. As shown in FIG. 1, a chimney 1 is provided vertically inside or outside a building (not shown) such as a commercial building. The chimney 1 is for discharging exhaust gas g from, for example, a boiler, a generator, a cold / hot water generator, and the like, but the present invention is not particularly limited to this.

The chimney 1 includes a chimney main body 10, a frame 20, and a lining member 30.
As shown in FIG. 2, the sectional shape of the chimney main body 10 is quadrangular (polygonal). More specifically, the chimney main body 10 has four flat chimney wall plates 11. These chimney wall plates 11 are assembled in a rectangular ring shape. A chimney corner 13 is formed by two adjacent chimney wall plates 11 intersecting at right angles. The chimney main body 10 is formed with four chimney corners 13. The interior angle θ 13 of each chimney corner ₁₃ is θ ₁₃ = 90 °.
The cross section of the chimney main body 10 in FIG. 2 is a square, but is not limited thereto, and may be a rectangle, a parallelogram, a trapezoid, or the like.

  The chimney wall plate 11 contains calcium silicate as a main component. The chimney wall plate 11 has heat resistance that can withstand a temperature of 600 ° C. or more.

  As shown in FIG. 1, a frame 20 is provided on the outer periphery of the chimney main body 10. The frame 20 includes a vertical frame member 21 and a horizontal frame member 22. The frame members 21 and 22 are made of, for example, a steel material such as an L-shaped angle.

  As shown in FIG. 2, an inner lining member 30 is provided on the inner periphery of the chimney main body 10. The inner wall surface 11 a of each chimney wall plate 11 of the chimney main body 10 is covered with a lining member 30. The inside of the lining member 30 is a flue 1a through which the exhaust gas g passes.

As shown in FIG. 3, the lining member 30 has a cylindrical shape with an octagonal cross section. In short, the lining member 30 is formed in a polygonal cylindrical shape having a larger number of corners than the chimney main body 10, preferably a polygon having twice the number of angles of the chimney main body 10.
The thickness of the lining member 30 is about 1 mm. In the figure, the thickness of the lining member 30 is exaggerated.

As shown in FIGS. 2 and 3, the lining member 30 is formed by bending a single metal plate 39. Examples of the material of the metal plate 39 include stainless steel and steel. By bending the metal plate 39, eight flat lining plates 31 are formed. Both ends 39e, 39e in the circumferential direction of the metal plate 39 are butted against each other and integrated by seamless welding. Thereby, a bead-shaped seamless welded portion 32 is formed. The lining member 30 has a semi-seamless polygonal annular shape in the circumferential direction.
In FIG. 3, the seamless welded portion 32 is disposed at one of the following four first lining angle portions 33 of the lining member 30. However, the present invention is not limited to this, and the following four second lining angles are provided. It may be arranged in one of the parts 34 or may be arranged in the middle part of one lining plate part 31.

  As shown in FIG. 2, two adjacent lining plate portions 31 of the lining member 30 intersect with each other to form lining corner portions 33 and 34. The lining plate portion 31 is formed with eight lining corner portions 33 and 34. Specifically, the lining member 30 has four first lining corners 33 and four second lining corners 34. The first lining corners 33 and the second lining corners 34 are alternately arranged along the circumferential direction of the lining member 30. In other words, the first lining corner 33 and the second lining corner 34 are adjacent to each other in the circumferential direction.

Each first lining corner 33 is opposed to one chimney corner 13 of the chimney main body 10 at a distance inside the chimney. The inner angle of the first inner corner ₃₃ (hereinafter, referred to as “first inner angle θ ₃₃ ”) is larger than the inner angle θ ₁₃ of the chimney angle ₁₃ . Preferably, the first interior angle θ ₃₃ is approximately θ ₃₃ = 100 ° to 120 °.
The first lining corner 33 is released from the chimney corner 13. Therefore, as shown in FIG. 4, the first inner corner ₃₃ is allowed to undergo thermal deformation such as approaching and separating from the chimney corner 13 and thermal deformation such that the first inner angle θ ₃₃ expands and contracts.

As shown in FIG. 2, the second lining corner 34 is opposed to an intermediate portion of the inner wall surface 11 a of the chimney wall plate 11 of the chimney main body 10. In other words, the portion of the lining member 30 facing the intermediate portion of the inner wall surface 11a of the chimney main body 10 is bent to form the second lining corner 34. The inner angle of the second inner corner portion 34 (hereinafter, referred to as “second inner angle θ ₃₄ ”) is larger than the first inner angle θ ₃₃ (θ ₃₄ <θ ₃₃ ). Preferably, the second interior angle θ ₃₄ is approximately θ ₃₄ = 120 ° to 170 °.

The distance d ₂ between the second lining corner 34 and the chimney wall plate 11 is shorter than the distance d ₁ between the first lining corner 33 and the chimney corner 13 (d ₂ <d ₁ ). Preferably, the second lining corner 34 is substantially in contact with the inner wall surface 11a of the chimney wall plate 11, and d ₂ ≒ 0.

The second lining corner 34 is restricted to the chimney wall plate 11 by the restriction member 41. As a result, thermal deformation such that the second lining corner portion 34 approaches and separates from the chimney wall plate 11 is prevented. Note that thermal deformation of the second inner corner portion 34 such that the second inner angle θ ₃₄ expands and contracts is allowed.
The restraining member 41 is constituted by, for example, an anchor bolt.

As shown in FIG. 1, exhaust gas g from a boiler, a generator, and the like in a commercial building is discharged to the atmosphere through a flue 1 a inside a lining member 30 of the square chimney 1. By making the chimney main body 10 a square cross section, the dead space can be made smaller than a chimney having a circular cross section.
From the chimney wall plate 11, a powdery exfoliated substance containing calcium silicate can be released. On the other hand, by covering the inner periphery of the chimney main body 10 with the lining member 30, it is possible to prevent the powdery exfoliated material from being scattered into the atmosphere together with the exhaust gas g.

The exhaust gas g has a high temperature of, for example, about several hundred degrees C. to 600 degrees C. The high-temperature exhaust gas g comes into contact with the lining member 30, and the lining member 30 is heated and thermally deformed. Specifically, as shown by a solid line in FIG. 4, the lining plate portions 31 on both sides of the first lining corner portion 33 are stretched and deformed, and accordingly, the first lining corner portion 33 faces the chimney corner portion 13. And the first interior angle θ ₃₃ becomes smaller.
In FIG. 4, a two-dot chain line indicates the lining member 30 that is not thermally deformed.
In other words, the lining member 30 can be caused to undergo a certain degree of thermal deformation, so that irregularities in the thermal deformation can be reduced or eliminated. Preferably, it is possible to cause thermal deformation in a direction in which the flue 1a spreads to the outer peripheral side. Therefore, even if the lining member 30 undergoes thermal deformation, it is possible to prevent the exhaust gas g from entering the gap 1c between the inner peripheral surface of the chimney main body 10 and the outer peripheral surface of the lining member 30. As a result, it is possible to reliably prevent the powdery exfoliated substance from being released into the atmosphere together with the exhaust gas g. Furthermore, exhaust gas g of high temperature and high humidity can be prevented from contacting the chimney main body 10 and being absorbed by calcium silicate, and the chimney main body 10 can be prevented from being damaged.
In addition, since the lining member 30 has a semi-seamless structure, it is possible to reliably prevent the exhaust gas g of high temperature and high humidity from entering the gap 1c. Therefore, it is possible to more reliably prevent the powdery exfoliated substance from dispersing into the atmosphere and from breaking the chimney main body 10.

Next, another embodiment of the present invention will be described. In the following embodiments, the same components as those described above are denoted by the same reference numerals in the drawings, and description thereof will be omitted.
<Second embodiment>
5 and 6 show a second embodiment of the present invention.
As shown in FIG. 5, in the chimney 1B of the second embodiment, the first lining corner 33 is restrained to the chimney corner 13 by a restraining member 42 formed of an oblique bracket. The first inner corner 33 is prevented from being thermally deformed so as to approach and separate from the chimney corner 13. Thermal deformation of the first inner corner ₃₃ such that the first inner angle θ ₃₃ expands and contracts is allowed.

The second lining corner 34 of the chimney 1B is released from the chimney wall plate 11 and is separated from the chimney wall plate 11 inside the chimney. Therefore, the second inner corner portion 34 is allowed to undergo thermal deformation such as approaching and separating from the chimney wall plate 11 and thermal deformation such that the second inner angle θ ₃₄ expands and contracts.

As shown by the solid line in FIG. 6, when the lining member 30 is heated by the exhaust gas g, the lining plate portions 31 on both sides of the second lining corner portion 34 are stretched and deformed. The lining angle portion 34 approaches the chimney wall plate 11, and the second inner angle θ ₃₄ decreases. In addition, the first interior angle θ ₃₃ increases. In this way, also in the chimney 1B of the second embodiment, the lining member 30 can be caused to undergo a certain degree of thermal deformation, so that irregularities in the thermal deformation can be reduced or eliminated.
In FIG. 6, the two-dot chain line indicates the lining member 30 that is not thermally deformed.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, the cross-sectional shape of the chimney main body is not limited to a quadrangle, but may be a triangle or a polygon such as a pentagon or more.
The cross-sectional shape of the lining member is a polygonal shape that matches the cross-sectional shape of the chimney body.
The lining member 30 may have a polygonal cylindrical shape that is completely seamless in the circumferential direction.

  INDUSTRIAL APPLICABILITY The present invention is applicable to, for example, a boiler of a commercial building and an exhaust gas stack of a generator.

1, 1B Chimney 1a Chimney 1c Gap 10 Chimney main body 11 Chimney wall plate 11a Inner wall surface 13 Chimney corner portion 30 Lining member 31 Lining plate portion 32 Seamless welded portion 33 First lining angle portion 34 Second lining angle portion θ ₁₃ Inner angle θ ₃₃ of chimney corner First inner angle θ ₃₃
θ ₃₄ second internal angle θ ₃₄
g exhaust gas

Claims (8)

A chimney body with a polygonal cross section, and a lining member provided on the inner periphery of the chimney body,
The inner lining member is formed in a polygonal cylindrical shape having a larger number of angles than the chimney main body, and the inner angle of the first lining angle portion of the lining member facing the chimney angle portion of one of the chimney main bodies is A chimney characterized by being larger than the inner angle of the chimney corner.   2. The second lining corner of the lining member, which is circumferentially adjacent to the first lining corner, faces an intermediate portion of an inner wall surface of a chimney wall plate of the chimney main body. 3. The chimney described in.   The chimney according to claim 2, wherein the inner angle of the first inner corner is smaller than the inner angle of the second inner corner.   4. The chimney according to claim 2, wherein the first lining corner is released from the chimney corner, and the second lining corner is restrained by the chimney wall plate. 5.   4. The chimney according to claim 2, wherein the first lining corner is restrained by the chimney corner, and the second lining corner is released from the chimney wall plate. 5.   The chimney according to any one of claims 1 to 5, wherein the lining member has a seamless polygonal tubular shape or a semi-sealed polygonal tubular shape having a seamless weld.   The chimney according to any one of claims 1 to 6, wherein the chimney wall plate of the chimney main body contains calcium silicate as a component. A lining member provided on the inner periphery of the chimney body having a polygonal cross section,
The interior angle of the first lining angle portion, which is formed in a polygonal cylindrical shape having a larger number of corners than the chimney body and faces the one chimney angle portion of the chimney body, is larger than the interior angle of the chimney angle portion. And chimney lining members.

Images