A large-size brick flue and steel flue connection device

Abstract

The invention discloses a connecting device for a large-size brick flue and a steel flue, wherein an embedded part is implanted on a structural column on the side of the original brick flue, one end of an expansion joint is connected to the embedded part, and the other end of the expansion joint is fixed to the end of the original steel flue, the middle part of the glass flake anti-corrosion layer is located on the expansion joint, one end of the glass flake anti-corrosion layer is located on the end face of the structural column on the side of the original brick flue, and the other end of the glass flake anti-corrosion layer is overlapped on the original steel flue; a card slot is opened on the inner side of the structural column on the side of the original brick flue, one end of a first folding plate is inserted into the card slot, one end of a second folding plate is overlapped on the other end of the first folding plate, and the other end of the second folding plate is fixed on the original steel flue, one end of an inner glass flake anti-corrosion layer is located on the inner lining of the structural column on the side of the original brick flue, and the other end of the inner glass flake anti-corrosion layer is located on the original steel flue; the inner glass flake anti-corrosion layer, the second folding plate, the first folding plate, the glass flake anti-corrosion layer and the expansion joint are distributed in sequence from the inside to the outside, and the connecting device has the characteristics of reliable operation and good economy.

Description

Technical Field

[0001] The invention belongs to the field of ultra-low emission environmental protection transformation of coal-fired power plants and relates to a connecting device for a large-size brick flue and a steel flue. Background Art

[0002] With the ultra-low emission transformation of coal-fired power plants underway, it is necessary to carry out corresponding anti-corrosion transformation on the aging and leaking brick flues of thermal power plants to meet the flue gas emission requirements after the ultra-low emission transformation.

[0003] In the early days, many power plants had horizontal flues in front of chimneys designed as brick flues. After years of operation, some flues have aged and leaked, and they need to be effectively treated with anti-seepage and anti-corrosion. Brick flues have aged for a long time and cannot be used any longer. Under the premise of tight renovation period, changing brick flues to steel flues is the most commonly used renovation technology solution, which can not only adopt mature design technology, but also ensure the quality requirements of the project, so as to achieve the ultimate goal of being suitable for national conditions, long-term safe and reliable operation, and economical and applicable. However, no similar structure is given in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the disadvantages of the prior art and provide a large-sized brick flue and steel flue connecting device, which has the characteristics of reliable operation and good economy.

[0005] To achieve the above-mentioned purpose, the large-size brick flue and steel flue connection device of the present invention comprises an expansion joint, a glass flake anti-corrosion layer, a first folding plate, a second folding plate and an inner glass flake anti-corrosion layer;

[0006] An embedded part is implanted on the structural column on the side of the original brick flue, one end of the expansion joint is connected to the embedded part, the other end of the expansion joint is fixed to the end of the original steel flue, the middle of the glass flake anti-corrosion layer is located on the expansion joint, one end of the glass flake anti-corrosion layer is located on the end face of the structural column on the side of the original brick flue, and the other end of the glass flake anti-corrosion layer is overlapped on the original steel flue;

[0007] A slot is provided on the inner side of the structural column on the original brick flue side, one end of the first folded plate is inserted into the slot, one end of the second folded plate is overlapped on the other end of the first folded plate, the other end of the second folded plate is fixed on the original steel flue, one end of the inner glass flake anti-corrosion layer is located on the inner lining of the structural column on the original brick flue side, and the other end of the inner glass flake anti-corrosion layer is located on the original steel flue;

[0008] The inner glass flake anti-corrosion layer, the second folding plate, the first folding plate, the glass flake anti-corrosion layer and the expansion joint are distributed in sequence from the inside to the outside.

[0009] The width and depth of the card slot are 50 mm and 50 mm respectively.

[0010] The first folding plate is an L-shaped structure.

[0011] The thickness of the first folded plate is 3 mm.

[0012] A high-temperature elastic bonding sealing material is poured into the card slot to fix the first folding plate in the card slot.

[0013] The thickness of the second folded plate is 3 mm.

[0014] The overlapping length of the first folded plate and the second folded plate is 200 mm.

[0015] The material of the high temperature elastic bonding sealing material is silicone rubber, silicone glue, fluorosilicone rubber or polyurethane glue.

[0016] The present invention has the following beneficial effects:

[0017] During specific operation, the large-size brick flue and steel flue connecting device described in the present invention adopts an arrangement method of adding two sealing folding plates, and arranges a card groove, two folding plates and an inner glass flake anti-corrosion layer at the connection between the original brick flue and the original steel flue, so as to achieve the emission requirements of flue gas after ultra-low emission transformation of coal-fired power plants, and at the same time achieve the design requirements of the transition from brick flue to steel flue, so as to achieve the purpose of reliable operation and safe use, and at the same time have good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 Cross-sectional view of AA.

[0020] Among them, 1 is the original brick flue side structural column, 2 is the glass flake anti-corrosion layer, 3 is the embedded part, 4 is the expansion joint, 5 is the slot, 6 is the first folding plate, 7 is the second folding plate, 8 is the original steel flue, and 9 is the inner glass flake anti-corrosion layer. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0022] refer to Figure 1 and Figure 2The large-size brick flue and steel flue connection device of the present invention comprises an expansion joint 4, a glass flake anti-corrosion layer 2, a first folding plate 6, a second folding plate 7 and an inner glass flake anti-corrosion layer 9; an embedded part 3 is implanted on the original brick flue side structural column 1, one end of the expansion joint 4 is connected to the embedded part 3, and the other end of the expansion joint 4 is fixed to the end of the original steel flue 8, the middle part of the glass flake anti-corrosion layer 2 is located on the expansion joint 4, one end of the glass flake anti-corrosion layer 2 is located on the end face of the original brick flue side structural column 1, and the other end of the glass flake anti-corrosion layer 2 is overlapped with the original steel flue 8; a slot 5 is opened on the inner side of the original brick flue side structural column 1, one end of the first folding plate 6 is inserted into the slot 5, one end of the second folding plate 7 is overlapped on the other end of the first folding plate 6, and the other end of the second folding plate 7 is fixed on the original steel flue 8, one end of the inner glass flake anti-corrosion layer 9 is located on the inner lining of the original brick flue side structural column 1, and the other end of the inner glass flake anti-corrosion layer 9 is located on the original steel flue 8; the inner glass flake anti-corrosion layer 9, the second folding plate 7, the first folding plate 6, the glass flake anti-corrosion layer 2 and the expansion joint 4 are distributed in sequence from the inside to the outside.

[0023] The width and depth of the card slot 5 are 50 mm and 50 mm respectively.

[0024] The first folding plate 6 is an L-shaped structure.

[0025] The thickness of the first folded plate 6 is 3 mm.

[0026] A high-temperature elastic adhesive sealing material is poured into the card slot 5 to fix the first folding plate 6 in the card slot 5 .

[0027] The thickness of the second folded plate 7 is 3 mm.

[0028] The overlapping length of the first folded plate 6 and the second folded plate 7 is 200 mm.

[0029] The material of the high temperature elastic bonding sealing material is silicone rubber, silicone glue, fluorosilicone rubber or polyurethane glue.

[0030] The specific construction process of the present invention is:

[0031] 1) Remove the original anti-corrosion layer from the joint between the brick flue and the original steel flue 8 to the base, and implant embedded parts 3 on the structural columns 1 on the side of the original brick flue to connect the expansion joints 4.

[0032] 2) A groove 5 is chiseled on the flue about 250 mm from the brick flue side, and a number of first folded plates 6 are made. The first folded plates 6 are arranged around the flue. After the first folded plates 6 and embedded parts 3 are welded, they are inserted into the groove 5, and then high-temperature elastic adhesive sealing material is poured.

[0033] 3) Weld the expansion joint 4 to the original steel flue 8, and then lay an inner glass flake anti-corrosion layer 9 to protect the embedded parts 3, the expansion joint 4 and the original steel flue 8.

[0034] 4) A second folded plate 7 is welded to the original steel flue 8, and the free end of the second folded plate 7 overlaps the first folded plate 6 by about 200 mm to ensure that it does not come off after expansion in the direction of the flue gas.

[0035] 5) An inner glass flake anti-corrosion layer 9 is laid on the inner side of the integral structure formed by the second folded plate 7 and the first folded plate 6, and is tightly connected with the brick flue lining and the steel flue anti-corrosion to achieve a secondary sealing effect.

Claims

1. A large-size brick flue and steel flue connection device, characterized in that: It comprises an expansion joint (4), a glass flake anti-corrosion layer (2), a first folding plate (6), a second folding plate (7) and an inner glass flake anti-corrosion layer (9); An embedded part (3) is implanted on the original brick flue side structural column (1), one end of the expansion joint (4) is connected to the embedded part (3), the other end of the expansion joint (4) is fixed to the end of the original steel flue (8), the middle of the glass flake anti-corrosion layer (2) is located on the expansion joint (4), one end of the glass flake anti-corrosion layer (2) is located on the end surface of the original brick flue side structural column (1), and the other end of the glass flake anti-corrosion layer (2) is overlapped on the original steel flue (8); A slot (5) is provided on the inner side of the original brick flue side structural column (1), one end of a first folded plate (6) is inserted into the slot (5), one end of a second folded plate (7) is overlapped on the other end of the first folded plate (6), the other end of the second folded plate (7) is fixed on the original steel flue (8), one end of the inner glass flake anti-corrosion layer (9) is located on the inner lining of the original brick flue side structural column (1), and the other end of the inner glass flake anti-corrosion layer (9) is located on the original steel flue (8); The inner glass flake anti-corrosion layer (9), the second folded plate (7), the first folded plate (6), the glass flake anti-corrosion layer (2) and the expansion joint (4) are sequentially arranged from the inside to the outside; The first folding plate (6) is an L-shaped structure; A high-temperature elastic bonding sealing material is poured into the card slot (5) to fix the first folding plate (6) in the card slot (5).

2. The large-size brick flue and steel flue connecting device according to claim 1 is characterized in that: The width and depth of the card slot (5) are 50 mm and 50 mm respectively.

3. The large-size brick flue and steel flue connecting device according to claim 1 is characterized in that: The thickness of the first folded plate (6) is 3 mm.

4. The large-size brick flue and steel flue connecting device according to claim 1 is characterized in that: The thickness of the second folded plate (7) is 3 mm.

5. The large-size brick flue and steel flue connecting device according to claim 1 is characterized in that: The overlapping length of the first folded plate (6) and the second folded plate (7) is 200 mm.

6. The large-size brick flue and steel flue connecting device according to claim 1 is characterized in that: The material of the high temperature elastic bonding sealing material is silicone rubber, silicone glue, fluorosilicone rubber or polyurethane glue.

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