Tail end mounting and fixing structure of oxidation air pipe

Abstract

The utility model discloses a tail end mounting and fixing structure of an oxidation air pipe, which is mounted in a slurry tank of a wet desulfurization absorption tower and is used for fixing the tail end of the oxidation air pipe. The mounting and fixing structure comprises a limiting pipe; one end of the oxidation air pipe limiting pipe is welded and fixed on the tower wall of the wet desulphurization absorption tower slurry pool through a welding point, the tail end of the oxidation air pipe is arranged in the oxidation air pipe limiting pipe from the other end of the limiting pipe, and a buffer layer is arranged between the oxidation air pipe and the limiting pipe. The vibration resistance of the oxidation air pipe can be remarkably improved, the oxidation air pipe is prevented from being broken due to frequent vibration, and the structure is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of installation of oxidation air pipes in a wet desulfurization absorption tower, in particular to a mounting fixing structure for the tail end of an oxidation air pipe. Background Art

[0002] The in-tower forced oxidation process is a traditional oxidation method used in limestone-gypsum wet flue gas desulfurization (FGD). The oxidation air pipe is located within the slurry pool of the wet flue gas desulfurization (FGD) absorption tower. The slurry within the pool contains limestone, calcium sulfate, calcium sulfite, and chloride ions, which are corrosive and abrasive to the components within the pool. Air within the oxidation air pipe is typically supplied by an external oxidation blower. The compressed air flowing within the pipe pulsates, which is particularly pronounced when the oxidation blower is started and stopped.

[0003] Existing oxidation air pipes are generally fixed to the upper or lower part of the support beam, and are rigidly connected and fixed without a buffer space. The tail end of the oxidation air pipe generally has no fixed structure. When the oxidation fan is running, the oxidation air pipe will vibrate, and the vibration at the tail end is more serious. Long-term vibration will cause the connector to loosen and even cause the tail end of the oxidation air pipe to break, thereby shortening the service life of the support beam and the oxidation air pipe.

[0004] The oxidation air pipe is usually placed in the slurry pool of the desulfurization absorption tower. Once the oxidation air pipe is loose and broken, it will lead to uneven oxidation and reduced oxidation efficiency. The slurry in the tower can only be drained during shutdown to carry out maintenance, which seriously affects production. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a mounting and fixing structure for the tail end of an oxidation air pipe.

[0006] The utility model discloses an oxidation air pipe tail end mounting and fixing structure, which is installed in a slurry pool of a wet desulfurization absorption tower and is used to fix the oxidation air pipe tail end; it includes: a limiting pipe;

[0007] One end of the limiting tube is fixed to the tower wall of the wet desulfurization absorption tower slurry pool through welding points, the tail end of the oxidation air tube is placed in the limiting tube from the other end of the limiting tube, and a buffer layer is provided between the oxidation air tube and the limiting tube.

[0008] As a further improvement of the present invention, the length of the limiting tube is ≥20 cm, one end of the limiting tube is fully welded to the tower wall, and an anti-corrosion layer is provided on the outside of the welding point.

[0009] As a further improvement of the present invention, the limiting tube is a 316L stainless steel tube with anti-corrosion function.

[0010] As a further improvement of the present invention, the material of the anti-corrosion layer is glass flakes.

[0011] As a further improvement of the present invention, the length of the oxidation air tube placed in the limiting tube is not less than 10 cm, and the length of the reserved space in the limiting tube meets the axial expansion requirement of the oxidation air tube.

[0012] As a further improvement of the present invention, the outer wall of the buffer layer is bonded to the inner wall of the limiting tube, and the distance between the inner wall of the buffer layer and the outer wall of the oxidation air tube is less than 1 mm. The buffer layer can reduce the radial vibration of the oxidation air tube.

[0013] As a further improvement of the present invention, the material of the buffer layer is an anti-corrosion material with a certain elasticity.

[0014] As a further improvement of the present invention, the buffer layer is a polypropylene buffer layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model transforms the traditional rigid connection of the oxidation air pipe into a soft limit connection, which can effectively reduce the vibration of the oxidation air pipe, thereby improving the vibration resistance of the oxidation air pipe and effectively preventing the oxidation air pipe from being worn and broken; it has a simple structure, easy installation, reliable operation and long service life, and is particularly suitable for the installation and fixation of the tail end of the oxidation air pipe in the wet desulfurization system;

[0017] The limit tube of the utility model adopts 316L stainless steel tube, which has corrosion resistance. At the same time, the welding place between the limit tube and the tower wall is treated with glass flakes for corrosion resistance, which makes the structure firm and has strong corrosion resistance.

[0018] The utility model provides a buffer layer between the limiting tube and the oxidation air tube, which can not only effectively reduce the wear caused by friction between the tail end of the oxidation air tube and the limiting tube, but also effectively reduce the radial swing amplitude of the oxidation air tube caused by air pulse vibration. In addition, the reserved space inside the limiting tube can provide a buffer space for the axial movement of the oxidation air tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the fixing structure for the tail end of the oxidation air pipe disclosed in the present utility model.

[0020] In the picture:

[0021] 1. Tower wall; 2. Welding point; 3. Limiting pipe; 4. Oxidation air pipe; 5. Anti-corrosion layer; 6. Buffer layer. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The present invention is described in further detail below with reference to the accompanying drawings:

[0024] like Figure 1 As shown, the utility model provides a mounting and fixing structure for the tail end of an oxidation air pipe, which is used to be installed in a slurry pool of a wet desulfurization absorption tower; the mounting and fixing structure includes: a limiting tube 3; one end of the limiting tube 3 is welded and fixed to the tower wall 1 of the slurry pool of the wet desulfurization absorption tower through a welding point 2, and the tail end of the oxidation air pipe 4 is placed in the limiting tube 3 from the other end of the limiting tube 3, and a buffer layer 6 is provided between the oxidation air pipe 4 and the limiting tube 3.

[0025] Specifically:

[0026] The limiting tube 3 of the utility model is a 316L stainless steel tube with anti-corrosion function. The length of the limiting tube 3 is ≥20 cm. It is fully welded to the tower wall. An anti-corrosion layer 5 is provided on the outside of the welding point 2. The anti-corrosion material of the anti-corrosion layer 5 is glass flakes.

[0027] The length of the oxidation air pipe 4 of the present invention placed in the limiting pipe 3 is not less than 10 cm, and the length of the reserved space in the limiting pipe 3 meets the axial expansion requirement of the oxidation air pipe 4.

[0028] The material of the buffer layer 6 of the present invention is an anti-corrosion material with a certain elasticity. Preferably, the material of the buffer layer 6 is polypropylene. The buffer layer 6 is bonded to the inner wall of the limiting tube 3, and the distance between the buffer layer 6 and the outer wall of the oxidation air tube 4 is less than 1 mm; the length of the buffer layer 6 is preferably the length of the oxidation air tube 4 placed in the limiting tube 3.

[0029] The installation steps of the oxidation air pipe tail end fixing structure of the utility model are as follows:

[0030] First, a limiting pipe 3 is welded and installed on the tower wall 1 of the wet desulfurization absorption tower slurry pool corresponding to the axial direction of the oxidation air pipe. A glass flake anti-corrosion layer 5 is provided on the outside of the welding point 2 between one end of the limiting pipe 3 and the tower wall 1 to complete the welding and anti-corrosion work of the limiting pipe;

[0031] Secondly, a circular polypropylene buffer layer 6 is bonded to the inner wall of the other end of the limiting tube 3;

[0032] Finally, the oxidation air pipe 4 is placed in the limiting pipe 3 from the axially opposite side of the limiting pipe 3 (the side of the buffer layer 6), thereby completing the installation work.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A mounting and fixing structure for the tail end of an oxidation air pipe, which is installed in the slurry pool of a wet desulfurization absorption tower and is used to fix the tail end of the oxidation air pipe; characterized in that: include: Limiting tube; One end of the limiting tube is fixed to the tower wall of the wet desulfurization absorption tower slurry pool through welding points, the tail end of the oxidation air tube is placed in the limiting tube from the other end of the limiting tube, and a buffer layer is provided between the oxidation air tube and the limiting tube.

2. The oxidation air pipe tail end mounting and fixing structure according to claim 1, characterized in that: The length of the limiting tube is ≥20 cm, one end of the limiting tube is fully welded to the tower wall, and an anti-corrosion layer is provided on the outside of the welding point.

3. The oxidation air pipe tail end mounting and fixing structure according to claim 2, characterized in that: The limiting tube is a 316L stainless steel tube.

4. The oxidation air pipe tail end mounting and fixing structure according to claim 2, characterized in that: The material of the anti-corrosion layer is glass flakes.

5. The oxidation air pipe tail end mounting and fixing structure according to claim 2, characterized in that: The length of the oxidation air pipe placed in the limiting pipe is not less than 10 cm.

6. The oxidation air pipe tail end mounting and fixing structure according to claim 1, characterized in that: The outer wall of the buffer layer is bonded to the inner wall of the limiting tube, and the distance between the inner wall of the buffer layer and the outer wall of the oxidation air tube is less than 1 mm.

7. The oxidation air pipe tail end mounting and fixing structure according to claim 1, characterized in that: The material of the buffer layer is an anti-corrosion material with certain elasticity.

8. The oxidation air pipe tail end mounting and fixing structure according to claim 7, characterized in that: The buffer layer is a polypropylene buffer layer.

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