CN210568513U

CN210568513U - Maintenance anti-corrosion structure of metal chimney leakage area

Info

Publication number: CN210568513U
Application number: CN201921088390.7U
Authority: CN
Inventors: 祁洪生
Original assignee: Shanghai Chenming Power Engineering Co ltd
Current assignee: Shanghai Chenming Power Engineering Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-05-19
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses a maintenance anticorrosion structure in metal chimney leakage area territory, including metal chimney body, locate the local leakage area territory on the metal chimney body, its characterized in that, it is equipped with the corruption pit to lie in the leakage area territory position on the inner wall of metal chimney body, is equipped with the repair structure in the corruption pit, and the surface of repair structure is equipped with the anticorrosive repair layer that covers the leakage area territory, lies in the leakage area territory position on the outer wall of metal chimney body and is equipped with the sheet metal that covers the leakage area territory. The utility model discloses the anticorrosive construction of maintenance is simple and convenient, and the commonality is strong, and the reinforcement is anticorrosive good.

Description

Maintenance anti-corrosion structure of metal chimney leakage area

Technical Field

The utility model relates to a chimney anticorrosion structure, concretely relates to maintenance anticorrosion structure in metal chimney seepage area belongs to the anticorrosive technical field of chimney.

Background

At present, domestic thermal power plants, chemical industry, metallurgy and other industry units mostly adopt flue gas discharged by metal chimneys, the flue gas generally adopts a wet desulphurization process, the flue gas temperature after desulphurization is low, the flue gas discharged by the chimneys is changed from original wet flue gas into saturated wet flue gas, and because the flue gas temperature is reduced (from original 80 ℃ to about 50 ℃), a large amount of strong corrosive condensate can be condensed in the chimneys and flows along the inner cylinder wall, and then the chimney base body is corroded. Along with the continuous chimney anticorrosion transformation of the chimney in recent years, the whole chimney is slowed down by the corrosion condition at the same time, but the local chimney corrosion failure happens occasionally, and the local chimney is corroded and leaked, so that the local chimney needs to be repaired in time. If the local leakage is not considered or the repairing effect is not good, the acid liquor corrosion channel can be formed in the local leakage area finally, so that the corrosion prevention of the whole chimney fails, the structure safety is influenced, and the economic loss is caused. Therefore, the local leakage area of the metal chimney needs to be timely and effectively maintained and protected against corrosion.

Disclosure of Invention

The to-be-solved technical problem of the utility model is how to maintain the metal chimney local leakage area anticorrosive, avoid the metal chimney to form the acidizing fluid and corrode the passageway and make whole chimney anticorrosive failure.

In order to solve the technical problem, the technical scheme of the utility model is to provide a maintenance anticorrosion structure in metal chimney leakage area, including metal chimney body, locate the local leakage area on the metal chimney body, its characterized in that, the position that is located the leakage area on the inner wall of metal chimney body is equipped with the corruption pit, is equipped with the repair structure in the corruption pit, and the surface of repair structure is equipped with the anticorrosive repair layer that covers the leakage area; and a metal plate covering the leakage area is arranged on the outer wall of the metal chimney body at the position of the leakage area.

Preferably, the inner wall of the metal chimney body is provided with an anticorrosive coating, and the repairing structure is epoxy repairing putty after an old anticorrosive coating is removed.

Preferably, the metal chimney body is of a composite alloy material structure, and the repairing structure is an alloy composite layer.

Preferably, the alloy composite layer is made of pure titanium or the same material as the inner wall of the metal chimney body.

Preferably, the anticorrosive repair layer is an anticorrosive brick with the inner side covered with a Bingold adhesive.

The utility model discloses utilize former metal chimney body structure, carry out sheet metal welding to the regional outer wall of local seepage of metal chimney and repair, the inner wall is repaired or is used guest's moral anticorrosive material anticorrosive after the repair welding to reached the mesh of anticorrosive antiseep in wet flue gas environment, concrete advantage is as follows:

(1) the construction is simple and convenient: the structure of the original metal chimney is not changed, only the corrosion layer of the corroded part in the chimney is removed, and the removal workload is small.

(2) The universality is strong: no matter the inner wall of the prior metal chimney is made of alloy materials such as scales, glass fiber reinforced plastics, building blocks, titanium steel composite plates and the like, the local leakage area can be subjected to anticorrosion treatment only by cleaning the inner wall.

(3) Excellent reinforcing performance: the outer wall of the local leakage area of the metal chimney is reinforced by repair welding with the same metal material as the original chimney.

(4) Special corrosion protection system: the inner wall of the local leakage area of the metal chimney corrodes a sunken area, special repair putty is used for filling up smoothness to improve the anti-seepage adhesive force, and then the binogold anticorrosive material is used for corrosion prevention.

Drawings

FIG. 1 is a schematic cross-sectional view of a maintenance anticorrosion structure for a metal chimney leakage area according to the present embodiment;

fig. 2 is a schematic view of a maintenance anticorrosion structure of a metal chimney leakage area according to this embodiment.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the utility model relates to a maintenance anti-corrosion structure for a metal chimney leakage area, wherein the metal chimney leakage area is that the metal chimney body 1 is corroded by acid liquor in flue gas, the anti-corrosion local failure leakage is caused, and the leakage positions are randomly distributed on the metal chimney; during construction, the outer wall of the metal chimney leakage area is welded and repaired by the metal plate 2, and the size and the material of the metal plate 2 can be selected according to the corrosion condition of the metal chimney body 1, so that the structural strength and the sealing effect of the metal chimney body 1 are met; the inner wall of the metal chimney 1 is provided with an anticorrosive coating, the old anticorrosive coating is removed at the position of the inner wall leakage area, the corroded pit is repaired and leveled by adopting a repairing layer 3, and the repairing layer 3 is epoxy repairing putty specially matched with an anticorrosive system, so that the metal chimney has the characteristics of high bonding strength and good sealing; after the inner wall of the metal chimney leakage area is repaired, the anticorrosion repairing layer 4 is used for anticorrosion outside the repairing layer 3, the anticorrosion repairing layer 4 comprises a binogold interface agent, an adhesive and an anticorrosion brick, the anticorrosion brick is bonded by the adhesive, and then the outside of the anticorrosion brick is covered by the binogold interface agent, so that the anticorrosion effect is better.

The utility model solves the problems of corrosion prevention in the local leakage area maintenance of the metal chimney and avoids the formation of an acid corrosion channel on the metal chimney; the problems that alloy materials are difficult to maintain and corrosion pit filling corrosion prevention effects are poor are solved, and corrosion prevention failure of the whole chimney is prevented. The utility model discloses the anticorrosive construction of maintenance is simple and convenient, and the commonality is strong, and the reinforcement is anticorrosive good.

Example 2

In the embodiment, the inner wall of the metal chimney is made of composite alloy materials, the leakage area is sealed by welding the alloy composite layer 5 in a repair mode, and the composite material 5 can be made of pure titanium materials and the like which are the same as the inner wall of the original metal chimney body 1 and is used for welding the leakage area of the inner wall in a repair mode; the anticorrosion repair layer 4 is also used for anticorrosion outside the alloy composite layer 5.

The rest is the same as in example 1.

Claims

1. The utility model provides a maintenance anti-corrosion structure in metal chimney seepage area, includes metal chimney body (1), locates the seepage area on metal chimney body (1), its characterized in that, it is equipped with the corruption pit to lie in seepage area position on the inner wall of metal chimney body (1), is equipped with the repair structure in the corruption pit, and the surface of repair structure is equipped with anticorrosive repair layer (4) that cover the seepage area, lies in seepage area position on the outer wall of metal chimney body (1) and is equipped with metal sheet (2) that cover the seepage area.

2. The maintenance anticorrosion structure of the metal chimney leakage area according to claim 1, characterized in that the inner wall of the metal chimney body (1) is provided with an anticorrosion layer, and the repairing structure is epoxy repairing putty (3) after the old anticorrosion layer is removed.

3. The maintenance anti-corrosion structure of the metal chimney leakage area according to claim 1, characterized in that the metal chimney body (1) is a composite alloy material structure, and the repair structure is an alloy composite layer (5).

4. The maintenance anti-corrosion structure of the metal chimney leakage area according to claim 3, characterized in that the alloy composite layer (5) is made of pure titanium or the same material as the inner wall of the metal chimney body (1).

5. The maintenance anticorrosion structure of a metal chimney leakage area according to claim 1, wherein the anticorrosion repair layer (4) is an anticorrosion brick covered with Bingold adhesive on the inner side.