CN220249336U - Corrosion-resistant protective structure of heat preservation shell aluminum skin - Google Patents

Abstract

The application discloses corrosion-resistant protective structure of heat preservation shell aluminium skin for carry out acid and alkali corrosion resistance protection to the parallel tube of axial flow pump. The application comprises the following steps: the aluminum skin heat-insulating layer is wrapped on the outer wall of the pipe body, the anti-corrosion layer is attached to the outer portion of the aluminum skin heat-insulating layer, a primer layer, a first glass fiber cloth layer, a heavy anti-corrosion coating layer and a second glass fiber cloth layer are sequentially arranged on the anti-corrosion layer from inside to outside, and the primer layer completely covers the outer surface of the aluminum skin heat-insulating layer.

Description

Corrosion-resistant protective structure of heat preservation shell aluminum skin

Technical Field

The application relates to the technical field of chemical equipment, in particular to an aluminum skin corrosion-resistant protection structure of an insulating layer shell.

Background

In the production process of phosphoric acid by a phosphorus chemical wet method, a large amount of equipment and pipeline outer walls need to be subjected to heat preservation treatment, the heat preservation shell is made of aluminum skin materials, acidic liquid is easy to corrode in contact, and in the process of using the heat preservation shell, the heat preservation shell is very necessary to be subjected to corrosion prevention treatment, otherwise, the service life of the heat preservation can be greatly shortened.

However, due to the special use environment in the production process of phosphoric acid by a phosphorus chemical wet method, the requirement on the corrosion resistance of the heat preservation layer is strong, so that in the process of installing the heat preservation layer, the heat preservation layer is necessarily subjected to corrosion resistance treatment, for example, the outside of the heat preservation layer of a parallel pipe of the concentrating device is wrapped by aluminum skin, when a graphite heat exchanger and related nearby pipes leak, acidic liquid drops to the position of the parallel pipe to corrode the heat preservation layer, the heat preservation effect of the device is affected, and the production cost is increased.

At present, an anti-corrosion treatment method for an aluminum skin of an insulating layer shell is mainly characterized in that epoxy zinc-rich primer is adopted to carry out twice brushing treatment on the surface of the aluminum skin, but when the aluminum skin enters a heavy corrosion area, particularly in environments with contact with acid liquor or high-concentration corrosiveness, the anti-corrosion performance of the aluminum skin is poor, the service life of a large number of insulating layers is shortened, and the service life is only less than two months in practice.

Disclosure of Invention

In order to solve the technical problem, the application provides an anti-corrosion protection structure for an aluminum skin of an insulating layer shell, which is used for protecting parallel pipes of an axial flow pump from acid and alkali corrosion. This corrosion-resistant protective structure of heat preservation shell aluminium skin includes:

the aluminum skin heat-insulating layer is wrapped on the outer wall of the pipe body, the anti-corrosion layer is attached to the outer portion of the aluminum skin heat-insulating layer, a primer layer, a first glass fiber cloth layer, a heavy anti-corrosion coating layer and a second glass fiber cloth layer are sequentially arranged on the anti-corrosion layer from inside to outside, and the primer layer completely covers the outer surface of the aluminum skin heat-insulating layer.

Optionally, the primer layer is a metal seal primer.

From the above technical scheme, the application has the following advantages:

in this application, be provided with primer layer, first glass fiber cloth layer, heavy-duty coating layer and second glass fiber cloth layer in the anticorrosive coating, wrap up through glass fiber cloth layer and twine closely and carry out heavy-duty coating layer's cover, can make aluminium skin heat preservation have the ability of resistant strong acid and alkali corrosion, improved aluminium skin heat preservation's life, and use glass fiber cloth to cover closely to scribble heavy-duty coating layer, can improve heavy-duty coating layer's binding capacity, and use glass fiber cloth layer has tasteless, nontoxic, pollution-free, the effect of nonflammability, can be widely used in the mill.

Drawings

Fig. 1 is a schematic structural view of an aluminum skin corrosion-resistant protection structure for an insulation shell provided in the present application.

Detailed Description

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely used to illustrate the relative positional relationships between the components or portions, and do not particularly limit the specific mounting orientations of the components or portions.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the structures, proportions, sizes, etc. shown in the drawings herein are shown and described in detail for purposes of illustration only, and are not intended to limit the scope of the utility model, which is defined in the claims, unless otherwise indicated, and which are otherwise used by those skilled in the art to which the utility model pertains.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to solve the technical problem, the application provides an anti-corrosion protection structure for an aluminum skin of an insulating layer shell, which is used for protecting parallel pipes of an axial flow pump from acid and alkali corrosion.

Referring to fig. 1, the corrosion-resistant protection structure of an aluminum skin of an insulation shell provided by the application includes:

the aluminum skin heat-insulating layer 02 comprises a pipe body 01, an aluminum skin heat-insulating layer 02 and an anti-corrosion layer 03, wherein the aluminum skin heat-insulating layer 02 is wrapped on the outer wall of the pipe body, the anti-corrosion layer 03 is attached to the outer portion of the aluminum skin heat-insulating layer 02, a primer layer 031, a first glass fiber cloth layer 032, a heavy-duty coating layer 033 and a second glass fiber cloth layer 034 are sequentially arranged on the anti-corrosion layer 03 from inside to outside, and the primer layer 031 completely covers the outer surface of the aluminum skin heat-insulating layer 02.

The utility model provides a corrosion-resistant protective structure is mainly used in phosphorus chemical industry wet process phosphoric acid production facility, for example, the parallel tube of enrichment facility, the parallel tube of axial-flow pump etc. owing to its operational environment's specificity, the pipeline needs to use aluminium skin heat preservation parcel, nevertheless the environment corrosivity is stronger, consequently, need carry out corrosion-resistant processing to aluminium skin heat preservation, the corrosion-resistant protective structure that this application provided can be fine protects aluminium skin heat preservation, this structure realizes the effect of corrosion-resistant through combining primer layer 01, glass fiber cloth layer and heavy anticorrosive coating layer 033, wherein glass fiber cloth layer's the ability of combining that can weight to corrode coating layer 033 and other layers, in this embodiment, through setting up two-layer glass fiber cloth layer, be the first glass fiber cloth layer 032 that covers on primer layer 031 and the second glass fiber cloth layer 034 that covers on heavy anticorrosive coating layer respectively, the improvement heavy anticorrosive coating layer's that can be fine, the whole anticorrosive coating layer's that improves anticorrosive coating's whole ability improves anticorrosive coating, life.

Based on the corrosion-resistant protection structure of the insulating layer shell aluminum skin, which is provided by the application, the application also provides a manufacturing method of the protection structure, and the method comprises the following construction flow:

(1) Cleaning dirt and dust on the surface of an aluminum skin matrix of the aluminum skin heat-insulating layer shell, and improving the effect of subsequent priming paint brushing;

(2) The surface of the aluminum skin matrix of the aluminum skin heat-insulating layer shell can be completely covered by adopting the metal seal primer to coat once, and a primer layer can be obtained;

(3) After the first layer of priming paint is coated, a first layer of glass fiber cloth can be paved, so that the first layer of glass fiber cloth is tightly combined with the priming paint to obtain a first glass fiber cloth layer;

(4) After the priming paint painted for the first time is thoroughly dried and hardened, the heavy anti-corrosion paint can be painted to cover the surface completely, a heavy anti-corrosion paint layer can be obtained, and then the glass fiber cloth is paved for the second time, and the glass fiber cloth and the aluminum skin of the heat preservation shell are also required to be tightly wound to obtain a second glass fiber cloth layer.

The corrosion-resistant protective structure obtained after the treatment by the method can perform good corrosion resistance and protection on the aluminum skin heat-insulating layer, so that the shell aluminum skin substrate of the treated aluminum skin heat-insulating layer can resist acid, alkali and salt corrosion, the service time of the heat-insulating layer can be prolonged in a corrosion environment with the relative humidity of more than 85%, and the corrosion damage treatment cost of the heat-insulating layer is reduced. The method has the advantages of simple steps, convenient operation, low cost and good anti-corrosion effect, and the selected raw materials are all paint materials in the prior art.

In the method, the heavy anti-corrosion coating is coated by the metal seal primer and covered by the glass fiber cloth, so that the anti-corrosion capability is enhanced, the coverage of the heavy anti-corrosion coating is ensured, the exposure is avoided, a compact anti-corrosion paint film is further formed, and the anti-corrosion performance of the aluminum skin of the heat preservation shell is improved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. An insulation shell aluminium skin corrosion-resistant protective structure, which is characterized by comprising:

the aluminum skin heat-insulating layer is wrapped on the outer wall of the pipe body, the anti-corrosion layer is attached to the outer portion of the aluminum skin heat-insulating layer, a primer layer, a first glass fiber cloth layer, a heavy anti-corrosion coating layer and a second glass fiber cloth layer are sequentially arranged on the anti-corrosion layer from inside to outside, and the primer layer completely covers the outer surface of the aluminum skin heat-insulating layer.

2. The insulation housing aluminum skin corrosion resistant protective structure of claim 1, wherein the primer layer is a metallic seal primer.

3. The insulation can aluminum skin corrosion resistant protective structure of claim 1, wherein the first fiberglass cloth layer or the second fiberglass cloth layer is wrapped by winding.