CN215463138U - Corrosion-resistant lower cylinder body of sulfuric acid absorption tower - Google Patents
Corrosion-resistant lower cylinder body of sulfuric acid absorption tower Download PDFInfo
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- CN215463138U CN215463138U CN202121218116.4U CN202121218116U CN215463138U CN 215463138 U CN215463138 U CN 215463138U CN 202121218116 U CN202121218116 U CN 202121218116U CN 215463138 U CN215463138 U CN 215463138U
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Abstract
The utility model relates to a corrosion-resistant lower cylinder of a sulfuric acid absorption tower, belonging to the technical field of chemical equipment, wherein the lower cylinder comprises: the device comprises a first shell, a second shell, a spray pipe and filler, wherein the first shell and the second shell are communicated with each other, the first shell comprises a first anti-corrosion brick layer, a first anti-corrosion protective layer and a first shell layer which are sequentially arranged from inside to outside, and the second shell comprises a second anti-corrosion brick layer, a second anti-corrosion protective layer and a second shell layer which are sequentially arranged from inside to outside; the spraying pipe is arranged in the second shell, the spraying pipe is close to the first shell, the filler is arranged in the first shell, the acid-resistant brick layer is additionally arranged on the part, which is not provided with the acid-resistant brick, of the barrel body to form a brick laying pressure-bearing layer required by glue injection, so that the aim of glue injection corrosion prevention is fulfilled.
Description
Technical Field
The utility model belongs to the technical field of chemical equipment, and particularly relates to an anti-corrosion lower cylinder body of a sulfuric acid absorption tower.
Background
At present, most of domestic sulfuric acid absorption towers adopt a sulfuric acid absorption tower in a German wood 78% sulfuric acid production process, and the aim of corrosion resistance is fulfilled by lining a lead layer or an acid-resistant asbestos plate in a carbon steel cylinder and then building an acid-resistant brick to form a protective structure. Most of the companies adopt the carbon steel cylinder anticorrosion design method of German wood technology, lead is lined on the inner wall of the carbon steel cylinder, then acid-resistant bricks are built on the cylinder part which is in contact with sulfuric acid liquid below a sulfuric acid spraying pipe to protect a lead layer, and acid-resistant bricks are not designed to be built on the part above the spraying pipe. However, the construction of domestic lead lining is difficult to meet the technical requirements of foreign design, so that the welding quality of the lead layer is difficult to ensure in site construction, and cracks are easy to appear between acid-resistant bricks during operation, so that the carbon steel cylinder is easy to corrode and leak after 2-3 years of operation. After leakage occurs, the common domestic corrosion prevention method is to inject semi-solid composite repair material or other acid-resistant glue between the carbon steel cylinder and the acid-resistant brick for corrosion prevention and isolation treatment, but flanges, short joints and the like of the cylinder are often overlooked easily, so that repair failure is caused. And for the cylinder body position only having a lead layer and not having acid-resistant bricks, the necessary bricklaying pressure-bearing layer can not be implemented due to the lack of the glue injection.
Therefore, the existing domestic anticorrosion repair method can only eliminate leakage temporarily, and the barrel is corroded in a short time, which becomes a great problem which troubles the domestic sulfuric acid production industry.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention has been made to provide a corrosion-resistant lower cylinder of a sulfuric acid absorption tower that overcomes or at least partially solves the above problems.
The embodiment of the utility model provides a corrosion-resistant lower cylinder body of a sulfuric acid absorption tower, which comprises: the device comprises a first shell, a second shell, a spray pipe and filler, wherein the first shell and the second shell are communicated with each other, the first shell comprises a first anti-corrosion brick layer, a first anti-corrosion protective layer and a first shell layer which are sequentially arranged from inside to outside, the second shell comprises a second anti-corrosion brick layer, a second anti-corrosion protective layer and a second shell layer which are sequentially arranged from inside to outside, a connecting mechanism is arranged at the upper end of the second shell layer and used for connecting an upper barrel of a sulfuric acid absorption tower, and the lower end of the second shell layer is connected with the upper end of the first shell layer; the second anticorrosive protection layer is correspondingly connected with the first anticorrosive protection layer, and the second corrosion-resistant brick layer is correspondingly connected with the first corrosion-resistant brick layer; the spray pipe is arranged in the second shell, the spray pipe is close to the first shell, and the filler is arranged in the first shell.
Optionally, the first shell layer is provided with at least one first injection hole, a first gap is formed between the first anticorrosive protection layer and the first shell layer, and the first injection hole is communicated with the first gap and used for injecting anticorrosive repair material into the first gap.
Optionally, the second shell layer is provided with at least one second injection hole, a second gap is formed between the second anticorrosive protection layer and the second shell layer, the second injection hole is communicated with the second gap and used for injecting an anticorrosive repair material into the second gap, and the second gap is communicated with the first gap.
Optionally, the diameters of the first injection hole and the second injection hole are 5mm-10mm, the distance between two adjacent first injection holes is 50cm-70cm, and the distance between two adjacent second injection holes is 50cm-70 cm.
Optionally, the lower cylinder further comprises a first anticorrosion repairing layer, and the first anticorrosion repairing layer is arranged between the first shell and the first anticorrosion protecting layer.
Optionally, the lower cylinder further comprises a second anticorrosion repairing layer, and the second anticorrosion repairing layer is arranged between the second shell and the second anticorrosion protecting layer.
Optionally, the junction of first casing and second casing is equipped with the manhole, be connected with the nipple joint on the manhole, the nipple joint includes third anti-corrosion brick layer, third anti-corrosion protection layer and the nipple joint shell layer that sets gradually from inside to outside, nipple joint shell layer principle manhole one end is equipped with the ring flange.
Optionally, a third gap is formed between the short section shell layer and the third corrosion prevention protective layer, and is used for filling a corrosion prevention repair material.
Optionally, a third corrosion prevention repairing layer is arranged between the short section shell layer and the third corrosion prevention protecting layer.
Optionally, the flange plate is coated with an anticorrosive layer.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the utility model provides a corrosion-resistant lower cylinder of a sulfuric acid absorption tower, which comprises: the device comprises a first shell, a second shell, a spray pipe and filler, wherein the first shell and the second shell are communicated with each other, the first shell comprises a first anti-corrosion brick layer, a first anti-corrosion protective layer and a first shell layer which are sequentially arranged from inside to outside, the second shell comprises a second anti-corrosion brick layer, a second anti-corrosion protective layer and a second shell layer which are sequentially arranged from inside to outside, a connecting mechanism is arranged at the upper end of the second shell layer and used for connecting an upper barrel of a sulfuric acid absorption tower, and the lower end of the second shell layer is connected with the upper end of the first shell layer; the second anticorrosive protection layer is correspondingly connected with the first anticorrosive protection layer, and the second corrosion-resistant brick layer is correspondingly connected with the first corrosion-resistant brick layer; the spraying pipe is arranged in the second shell, the spraying pipe is close to the first shell, the filler is arranged in the first shell, and an acid-resistant brick layer is additionally arranged on the part, which is not provided with the acid-resistant brick, of the barrel body to form a brick laying pressure bearing layer required by glue injection, so that the aim of glue injection corrosion prevention is fulfilled.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural view of a lower cylinder of the prior art;
FIG. 2 is a schematic diagram of a modification process of a lower cylinder provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a lower cylinder provided in an embodiment of the present invention;
reference numerals: 1-a first shell, 11-a first corrosion-resistant brick layer, 12-a first corrosion-resistant protection layer, 13-a first shell layer, 14-a first corrosion-resistant repair layer, 2-a second shell, 21-a second corrosion-resistant brick layer, 22-a second corrosion-resistant protection layer, 23-a second shell layer, 231-a connecting mechanism, 24-a second corrosion-resistant repair layer, 3-a spray pipe, 4-a filler, 5-a short section, 51-a third corrosion-resistant brick layer, 52-a third corrosion-resistant protection layer, 53-a short section shell layer, 531-a flange plate and 54-a third corrosion-resistant repair layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is noted that relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In the description of the present application, it should be further noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings or that the product of the application is usually placed in use, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the application.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
the applicant finds in the course of the utility model that: the corrosion frequently occurred in the sulfuric acid absorption tower body in the german wood 78% sulfuric acid production process, in which the sulfuric acid absorption tower used was divided into an upper cylinder (glass fiber reinforced plastic) and a lower cylinder (carbon steel lining 5mm thick lead layer). The upper cylinder body has no corrosion problem, the lower cylinder body is provided with a plurality of lead liners in a welding mode, the lower half portion of the lower cylinder body is provided with acid-resistant brick protection, and the upper half portion of the lower cylinder body is not provided with acid-resistant brick protection. Because the lower cylinder has more lead-lined welding seams inside, the phenomenon that the carbon steel cylinder is corroded by sulfuric acid after the welding seams are damaged often occurs, although the existing cylinder glue injection repairing technology exists at present, a lining brick pressure bearing layer must be required inside the cylinder during glue injection, the upper half part of the lower cylinder does not have an acid-resistant brick pressure bearing layer, and once corrosion and leakage occur, the repairing is difficult.
The utility model aims at the barrel part without building acid-resistant bricks, and provides a brick-building pressure-bearing layer required by glue injection through the improvement of an internal structure, thereby achieving the purpose of glue injection and corrosion prevention. Meanwhile, the flange, the connecting pipe and other places with damaged lead lining layers at key positions on the lower barrel body are coated with glass fiber cloth and epoxy resin for flanging treatment, and the sealing surface is completely protected in place to achieve the purpose of corrosion prevention. The carbon steel body of the absorption tower can be effectively protected by implementing the method, so that the corrosion of sulfuric acid is avoided, the service life of the sulfuric acid absorption tower is prolonged, and unnecessary maintenance cost is greatly reduced.
According to an exemplary embodiment of the present invention, there is provided a corrosion-resistant lower cylinder of a sulfuric acid absorption tower, the lower cylinder including: the device comprises a first shell, a second shell, a spray pipe and filler, wherein the first shell and the second shell are communicated with each other, the first shell comprises a first anti-corrosion brick layer, a first anti-corrosion protective layer and a first shell layer which are sequentially arranged from inside to outside, the second shell comprises a second anti-corrosion brick layer, a second anti-corrosion protective layer and a second shell layer which are sequentially arranged from inside to outside, a connecting mechanism is arranged at the upper end of the second shell layer and used for connecting an upper barrel of a sulfuric acid absorption tower, and the lower end of the second shell layer is connected with the upper end of the first shell layer; the second anticorrosive protection layer is correspondingly connected with the first anticorrosive protection layer, and the second corrosion-resistant brick layer is correspondingly connected with the first corrosion-resistant brick layer; the spray pipe is arranged in the second shell, the spray pipe is close to the first shell, and the filler is arranged in the first shell. The first anticorrosion protective layer and the second anticorrosion protective layer can be selected from a lead lining layer or an acid-resistant asbestos board and the like; it should be noted that, generally, the first shell and the second shell are generally integrated (i.e. integrally formed), in other words, the first shell and the second shell included in the first shell and the second shell are integrally formed, the first corrosion resistant brick layer and the second corrosion resistant brick layer are integrally formed, and the first corrosion protection layer and the second corrosion protection layer are integrally formed.
By adopting the design, the acid-resistant brick layer is additionally arranged on the part of the barrel body which is not provided with the acid-resistant bricks at present to form the brick laying pressure-bearing layer required by glue injection, so that the aim of glue injection corrosion resistance is fulfilled.
As an optional implementation manner, the first shell layer is provided with at least one first injection hole, a first gap is arranged between the first anticorrosive protection layer and the first shell layer, and the first injection hole is communicated with the first gap and used for injecting anticorrosive repair material into the first gap.
As an optional implementation manner, the second shell layer is provided with at least one second injection hole, a second gap is arranged between the second anticorrosion protection layer and the second shell layer, the second injection hole is communicated with the second gap for injecting an anticorrosion repair material into the second gap, and the second gap is communicated with the first gap.
When the lower cylinder body is corroded and leaked, the semi-solid composite repair material is injected to the first gap and the second gap through the first injection holes and the second injection holes for corrosion prevention and isolation, so that the corrosion of sulfuric acid is effectively avoided, and the service life of the sulfuric acid absorption tower is prolonged.
In an alternative embodiment, the diameters of the first injection hole and the second injection hole are 5mm-10mm, the distance between two adjacent first injection holes is 50cm-70cm, and the distance between two adjacent second injection holes is 50cm-70 cm.
The reason for controlling the diameters of the first injection hole and the second injection hole to be 5mm-10mm is that the injection speed and the injection pressure of the proper repair material can be ensured, the excessive diameter has the adverse effect that the injection amount is too large, the repair material cannot flow in time in the gap, so that the injection pressure is increased, the overpressure collapse of the acid-resistant brick is easily caused, the insufficient adverse effect is that the injection speed is slow, the repair material cannot form certain pressure in the gap, and the gap dead angle is easily formed.
The reason for controlling the distance between the first injection holes and the distance between the second injection holes to be 50cm-70cm is to ensure that the injection of the repair material is not unsmooth due to too long flow distance between gaps and the injection uniformity is also ensured.
As an optional implementation mode, the lower cylinder further comprises a first anticorrosion repairing layer, the first anticorrosion repairing layer is arranged between the first shell and the first anticorrosion protecting layer, the lower cylinder further comprises a second anticorrosion repairing layer, and the second anticorrosion repairing layer is arranged between the second shell and the second anticorrosion protecting layer.
The first anticorrosion repairing layer and the second anticorrosion repairing layer are made of semisolid composite repairing materials or other acid-resistant glue, and specifically can be patent products 3216 semisolid composite materials and KPI acid-resistant glue mud of Gansu China cis petrochemical engineering equipment Limited.
Generally speaking, the junction of first casing and second casing is equipped with the manhole, be connected with the nipple joint on the manhole, in this embodiment, in order to increase the corrosion resisting property of whole barrel down, the nipple joint includes third anti-corrosion brick layer, third anticorrosion protective layer and the nipple joint shell layer that sets gradually from inside to outside, nipple joint shell layer principle manhole one end is equipped with the ring flange, because the manhole is less, and the third anti-corrosion brick layer of here is according to actual conditions, probably needs to customize the special-shaped brick, and in sum, needs to satisfy both to guarantee the anticorrosive requirement and reserve the appropriate space that the people got into.
As an optional implementation manner, a third gap is formed between the short section shell layer and the third corrosion prevention protection layer for filling a corrosion prevention repair material, or a third corrosion prevention repair layer is formed between the short section shell layer and the third corrosion prevention protection layer.
As an alternative embodiment, the flange plate is coated with an anticorrosive layer, specifically, the anticorrosive layer includes: 3-5 layers of glass fiber cloth and acid-resistant resin.
Because the existing sulfuric acid absorption tower in the production process of 78% sulfuric acid by wood of germany has more factories, the embodiment also provides a scheme for transforming the existing lower cylinder into the lower cylinder provided by the application, and the structure of the existing lower cylinder is shown in fig. 1, and specifically comprises the following steps: the device comprises a cylinder connecting flange, an anticorrosive lead layer, a manhole flange, a short joint, a spray pipe, an acid-resistant brick protection lead layer, an absorption tower carbon steel cylinder, a filler and an acid-resistant brick. Wherein the anticorrosive lead layer is in inside piecemeal welding of full tower and all carries out the turn-ups processing in barrel flange and manhole flange and nipple joint department, protects the flange seal face to this reaches and carries out complete isolation with sulphuric acid and absorption tower carbon steel barrel. The acid-resistant brick is laid on the innermost side to protect the anticorrosive lead layer, and the acid-resistant brick is protected by the acid-resistant brick protection lead layer on the top of the acid-resistant brick, so that the acid-resistant brick damage caused by long-term sulfuric acid washing is avoided. Then the filling material is filled in the tower to increase the gas-liquid contact area and improve the absorption efficiency. Because the protective lead layer is assembled and welded in blocks during construction, sand holes and cracks are easily generated due to temperature and liquid scouring in the using process, so that sulfuric acid is contacted with the carbon steel cylinder of the absorption tower, and the carbon steel cylinder of the absorption tower is corroded and leaks. Therefore, the transformation scheme is that a lead layer damaged due to the fact that acid-resistant bricks are not protected in the cylinder body is removed, but the lead layer which is 20-30cm below a connecting flange of the cylinder body needs to be reserved for being lapped with the subsequent built acid-resistant bricks during removal, and meanwhile a part of the lead layer needs to be reserved at a connecting pipe and the like. Then cleaning the acid sludge on the inner wall of the cylinder body and washing the acid sludge by clean water. And (3) finishing the top plane of the acid-resistant brick originally built in the cylinder body to ensure that the plane is smooth, and particularly referring to fig. 2, the subsequent acid-resistant brick is conveniently heightened and built. After the top plane of the acid-proof brick is finished, heightening and building are carried out until the connecting flange of the cylinder body is aligned with the connecting flange as much as possible. And finally, uniformly drilling small holes with the diameter of 8mm (the distance between the upper part and the lower part is about 60cm from the left to the right) on the outer part of the cylinder body and tapping, ensuring that the holes are drilled to the gap between the cylinder body and the newly-built acid-resistant brick, and injecting a semi-solid composite repairing material to the gap between the cylinder body and the acid-resistant brick through the small holes for corrosion prevention and isolation. Before the acid-resistant bricks are added for building, a manhole flange and a pipe connecting flange need to be turned over to damage a lead layer to be dismantled, particularly, the sealing surface of the flange needs to be cleaned up, and then 3-5 layers of glass fiber cloth and acid-resistant resin are coated. The special-shaped bricks are customized at the manhole flange short joint according to the requirements, so that the anti-corrosion requirement is ensured, and a proper space for people to enter is reserved.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
(1) the lower cylinder provided by the embodiment of the utility model forms a brick laying pressure bearing layer required by glue injection by additionally arranging the acid-resistant brick layer on the part of the cylinder which is not provided with the acid-resistant bricks at present, so that the aim of glue injection corrosion resistance is fulfilled;
(2) the lower cylinder provided by the embodiment of the utility model carries out flanging treatment on the damaged part of the lead lining layer of the key parts such as the flange, the connecting pipe and the like on the lower cylinder by coating glass fiber cloth and epoxy resin, so that the sealing surface is completely protected in place to achieve the purpose of corrosion prevention;
(3) the lower cylinder provided by the embodiment of the utility model prolongs the service life of the current lower cylinder from about 4 years to more than 9 years, the service life is prolonged by at least 5 years, the single-tower repair cost is about 50 ten thousand yuan, and if the current tower cannot be treated by corrosion, the current tower has potential safety hazards due to rapid corrosion and cannot be normally used. The cost for re-purchasing and installing the two towers is about 500 ten thousand yuan, so the cost is saved in 5 years of life each year: (500-100) ten thousand yuan/5 years to 80 ten thousand yuan/year, and has remarkable economic benefit.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A corrosion-resistant lower cylinder of a sulfuric acid absorption tower, comprising: the device comprises a first shell, a second shell, a spray pipe and filler, wherein the first shell and the second shell are communicated with each other, the first shell comprises a first anti-corrosion brick layer, a first anti-corrosion protective layer and a first shell layer which are sequentially arranged from inside to outside, the second shell comprises a second anti-corrosion brick layer, a second anti-corrosion protective layer and a second shell layer which are sequentially arranged from inside to outside, a connecting mechanism is arranged at the upper end of the second shell layer and used for connecting an upper barrel of a sulfuric acid absorption tower, and the lower end of the second shell layer is connected with the upper end of the first shell layer; the second anticorrosive protection layer is correspondingly connected with the first anticorrosive protection layer, and the second corrosion-resistant brick layer is correspondingly connected with the first corrosion-resistant brick layer; the spray pipe is arranged in the second shell, the spray pipe is close to the first shell, and the filler is arranged in the first shell.
2. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower as claimed in claim 1, wherein the first shell is provided with at least one first injection hole, a first gap is formed between the first corrosion-resistant protection layer and the first shell, and the first injection hole is communicated with the first gap for injecting corrosion-resistant repair material into the first gap.
3. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower as claimed in claim 2, wherein the second shell is provided with at least one second injection hole, a second gap is formed between the second corrosion-resistant protection layer and the second shell, the second injection hole is communicated with the second gap for injecting corrosion-resistant repair material into the second gap, and the second gap is communicated with the first gap.
4. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower according to claim 3, wherein the first injection holes and the second injection holes have a diameter of 5mm to 10mm, a distance between two adjacent first injection holes is 50cm to 70cm, and a distance between two adjacent second injection holes is 50cm to 70 cm.
5. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower according to claim 1, further comprising a first corrosion-resistant repair layer provided between the first housing and the first corrosion-resistant protective layer.
6. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower according to claim 1, further comprising a second corrosion-resistant repair layer provided between the second housing and the second corrosion-resistant protective layer.
7. The corrosion-resistant lower cylinder body of the sulfuric acid absorption tower as claimed in claim 1, wherein a manhole is arranged at the joint of the first shell and the second shell, a short joint is connected to the manhole, the short joint comprises a third corrosion-resistant brick layer, a third corrosion-resistant protective layer and a short joint shell layer which are arranged from inside to outside in sequence, and a flange plate is arranged at one end of the manhole in the short joint shell layer principle.
8. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower according to claim 7, wherein a third gap is provided between the short shell layer and the third corrosion-resistant protection layer for filling a corrosion-resistant repair material.
9. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower as claimed in claim 7, wherein a third corrosion-resistant repair layer is disposed between the short shell layer and the third corrosion-resistant protection layer.
10. The corrosion-resistant lower cylinder of the sulfuric acid absorption tower according to claim 7, wherein the flange is coated with a corrosion-resistant layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121218116.4U CN215463138U (en) | 2021-06-02 | 2021-06-02 | Corrosion-resistant lower cylinder body of sulfuric acid absorption tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121218116.4U CN215463138U (en) | 2021-06-02 | 2021-06-02 | Corrosion-resistant lower cylinder body of sulfuric acid absorption tower |
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| CN215463138U true CN215463138U (en) | 2022-01-11 |
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| CN202121218116.4U Active CN215463138U (en) | 2021-06-02 | 2021-06-02 | Corrosion-resistant lower cylinder body of sulfuric acid absorption tower |
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