CN215981451U

CN215981451U - Joint of slurry circulating pump of desulfurization absorption tower

Info

Publication number: CN215981451U
Application number: CN202121270329.1U
Authority: CN
Inventors: 邝文斌
Original assignee: Foshan Hengyi Thermal Power Co ltd
Current assignee: Foshan Hengyi Thermal Power Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-03-08
Anticipated expiration: 2031-06-08

Abstract

The utility model discloses a joint of a slurry circulating pump of a desulfurization absorption tower, which comprises a pipe body, wherein the pipe body is arranged in a conical shape, the inner wall of the pipe body is coated with a lining anticorrosive layer in a covering manner, and the lining anticorrosive layer is a silicon carbide coating. According to the joint of the desulfurization absorption tower slurry circulating pump, the inner wall is coated with the silicon carbide coating to realize anti-corrosion repair treatment, so that the coating of materials can be directly completed on a construction site, the joint does not need to be transferred and transported, the construction is convenient, the repair operation is convenient, and the time for transporting the joint back and forth is saved; meanwhile, when the silicon carbide material is cured and is approved, the silicon carbide material can be reused, the influence on the shutdown of a desulfurization absorption tower system is small, and the silicon carbide coating has a good anticorrosion effect and is beneficial to prolonging the service life of the joint.

Description

Joint of slurry circulating pump of desulfurization absorption tower

Technical Field

The utility model relates to waste gas treatment equipment, in particular to a joint of a slurry circulating pump of a desulfurization absorption tower.

Background

In the coal-fired power generation process, flue gas can be generated, and the flue gas contains the sulfur dioxide as a pollution gas, so that in the coal-fired power generation process, the flue gas needs to be subjected to desulfurization treatment through a desulfurization absorption tower system so as to reduce the discharged flue gas and meet the environmental protection requirement. Because the slurry adopted in the desulfurization process has strong corrosivity, the inner wall of the pipeline of the desulfurization absorption tower system needs to be subjected to anti-corrosion processing treatment; in the prior art, the inner wall of the carbon steel pipeline is generally provided with rubber to realize corrosion prevention and isolation so as to ensure the normal operation of a desulfurization absorption tower system.

The diameter of a pipeline for transporting slurry in the desulfurization absorption tower is larger, and the outlet of the circulating pump is smaller, so that the circulating pump is connected with the pipeline by adopting a joint (commonly called a reducer) which is arranged in a conical shape at the joint of the circulating pump and the pipeline. After long-term use, the joint lining rubber of the slurry circulating pump of the desulfurization absorption tower is easy to age, and part of lining rubber falls off, so that the base material of the joint is corroded, and then the joint is perforated to leak slurry, and needs to be detached and repaired for later use. The lining rubber that slurry circulating pump connects is restoreed, need transport it to appointed mill can carry out the rubber of inner wall and restore or change, wastes time and energy, and leads to the desulfurization absorption tower can only shut down the wait, seriously influences the exhaust-gas treatment progress, consequently is necessary to provide a restoration convenience and the effectual joint of anticorrosive.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides the joint of the slurry circulating pump of the desulfurization absorption tower, the lining anticorrosive coating of the joint is convenient to repair, and the anticorrosive effect is good.

The purpose of the utility model is realized by the following technical scheme:

the joint of the desulfurization absorption tower slurry circulating pump is characterized by comprising a pipe body, wherein the pipe body is arranged in a conical shape, the inner wall of the pipe body is coated with an inner lining anticorrosive coating in a covering mode, and the inner lining anticorrosive coating is a silicon carbide coating.

The working principle of the joint of the slurry circulating pump of the desulfurization absorption tower is as follows:

when the lining of the joint needs to be repaired or re-coated, after the joint is disassembled, the original lining glue on the inner wall of the joint is cleaned, then the silicon carbide material is coated on the inner wall of the joint on site, and after solidification, a silicon carbide coating is formed, so that the corrosion prevention and isolation of the inner wall of the joint are realized. The silicon carbide coating is adopted to realize the anticorrosion isolation of the joint, the smearing of materials can be completed on a construction site during the repair, the joint does not need to be transferred and transported, the construction is convenient, the repair operation is convenient, and the time for the round-trip transportation of the joint is saved; meanwhile, when the silicon carbide material is cured and approved, the silicon carbide material can be reused, and the silicon carbide coating has a good corrosion prevention effect and is beneficial to prolonging the service life.

In a preferable scheme of the utility model, a fastening adhesive piece is arranged on the inner wall of the pipe body, and the lining anticorrosive layer is arranged on the fastening adhesive piece.

Preferably, the fastening adhesive is a steel mesh.

Preferably, the steel wire mesh is fixed on the inner wall of the pipe body in a welding mode.

Preferably, the steel wire mesh is subjected to sand blasting treatment, and the lining anticorrosive coating is smeared and covered on the steel wire mesh.

In a preferred embodiment of the present invention, the connecting rings are disposed at both ends of the tube body, and the diameter of the connecting rings is larger than that of the end of the tube body.

Preferably, the connecting ring is provided with a plurality of connecting holes, and the connecting holes are distributed along the circumferential direction of the connecting ring at equal intervals.

Compared with the prior art, the utility model has the following beneficial effects:

according to the joint of the desulfurization absorption tower slurry circulating pump, the inner wall is coated with the silicon carbide coating to realize anti-corrosion repair treatment, so that the coating of materials can be directly completed on a construction site, the joint does not need to be transferred and transported, the construction is convenient, the repair operation is convenient, and the time for transporting the joint back and forth is saved; meanwhile, when the silicon carbide material is cured and is approved, the silicon carbide material can be reused, the influence on the shutdown of a desulfurization absorption tower system is small, and the silicon carbide coating has a good anticorrosion effect and is beneficial to prolonging the service life of the joint.

Drawings

Fig. 1 to 4 are schematic structural views of a joint of a slurry circulation pump of a desulfurization absorption tower according to an embodiment of the present invention, in which fig. 1 is a front view, fig. 2 is a sectional view, fig. 3 is an enlarged view of a in fig. 2, and fig. 4 is a schematic view of a steel wire mesh.

Detailed Description

The present invention will be further described with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1-3, the joint of the slurry circulation pump of the desulfurization absorption tower of the embodiment includes a pipe body 1, the pipe body 1 is in a tapered shape, the inner wall of the pipe body 1 is coated with a lining anticorrosive coating 5 in a covering manner, and the lining anticorrosive coating 5 is a silicon carbide coating.

Referring to fig. 1-4, the inner wall of the pipe body 1 is provided with a fastening adhesive member, and the lining corrosion protection layer 5 is disposed on the fastening adhesive member. Through the setting of fastening adhesive spare, improve the adhesion degree of inside lining

anticorrosive coating

5 and 1 inner walls of body to be favorable to improving anticorrosive wear-resisting effect.

Referring to fig. 1-4, the fastening adhesive is a steel mesh 4. Set up wire net 4 at 1 inner wall of body, let inside lining anticorrosive coating 5 simultaneously can with 1 inner wall of body and the bonding of wire net 4, further improve inside lining anticorrosive coating 5's adhesive force.

Referring to fig. 1 to 4, the steel wire mesh 4 is fixed on the inner wall of the pipe body 1 by welding. The fixing of wire net 4 and body 1 inner wall is realized to the mode that adopts the welding, and stability is good for wire net 4 and body 1 form an organic whole, thereby be favorable to improving the adhesive force and the adhesion degree after scribbling the carborundum material.

In this embodiment, the steel wire mesh 4 is subjected to sand blasting and then is coated with the lining anticorrosive coating 5. After the sand blasting treatment, the mechanical property of the surface of the steel wire mesh 4 is improved, the adhesive force between the steel wire mesh and the lining anticorrosive coating 5 is increased, and the durability of the lining anticorrosive coating 5 is favorably prolonged.

Referring to fig. 1-2, the pipe body 1 is provided with connecting rings 2 at both ends thereof, and the diameter of the connecting rings 2 is larger than that of the ends of the pipe body 1. Through the setting of go-between 2, be convenient for connect with the pipe connection of circulating pump.

Referring to fig. 1-2, the connection ring 2 is provided with a plurality of connection holes 3, and the connection holes 3 are distributed along the circumferential direction of the connection ring 2 at equal intervals. The connecting hole 3 is arranged to facilitate connection with a pipeline.

Referring to fig. 1 to 4, the working principle of the joint of the slurry circulation pump of the desulfurization absorption tower of the present embodiment is as follows:

when the joint needs to be subjected to lining repair or re-smearing, after the joint is disassembled, the original lining glue and the residual gypsum (slurry raw material) on the inner wall of the joint are cleaned, and the inner wall base material of the joint pipe body 1 is polished, repaired, welded and repaired to be leveled. Then, welding a steel wire mesh 4 on the inner wall of the pipe body 1, and performing sand blasting treatment to improve the mechanical property of the steel wire mesh 4; when the sand blasting treatment is carried out, the grinding material is carborundum or quartz sand, the grinding material has certain hardness and impact toughness, oil contamination cannot be contained after screening before use, and the water content is not more than 1%; when in sand blasting and rust removing, the working pressure is adjusted between 0.5 and 0.7MP, the sand blasting angle is 30 to 70 degrees, the diameter of the nozzle is 4 to 5mm, and the nozzle is replaced when the diameter of the nozzle is abraded by more than 20 percent; the sand blasting rust removal of the metal surface of the steel wire mesh 4 must reach Sa2.5 grade, welding slag burrs and the like should be avoided, the surface welding line should be smooth and flat, the protruding height does not exceed 0.5mm, and if the protruding height exceeds the protruding height, the metal surface is ground by a grinder until the protruding height meets the requirements. Before the silicon carbide material is coated, the steel wire mesh 4 and the inner wall of the pipe body 1 are cleaned by adopting sewage and alcohol. Finally, directly coating a silicon carbide material on the inner wall of the joint on site, and forming a silicon carbide coating after curing to finish the anticorrosion repair processing of the joint and realize the anticorrosion isolation of the inner wall of the joint; when in coating construction, the silicon carbide anticorrosive material is uniformly coated on the repaired (or protected) surface by a spatula or a scraper, the thickness of each time of blade coating is at least more than 2mm, and the silicon carbide anticorrosive material is formed by blade coating twice (if the thickness of more than 6mm is needed, the silicon carbide anticorrosive material can be blade coated more times); the silicon carbide anticorrosive material needs to be closely contacted with the surface of repair (protection) and needs to be embedded into a gap of the rough surface of repair (protection) so as to have good adhesive force; the edge of the silicon carbide anticorrosive material does not need to be carved flat; during protection, the thin or blank cut edges are not required to be left on the protection surface; in the coating process, the surface can be decorated and leveled by a water-dipping spatula or a fire-baking hot spatula so as to increase the smoothness and the attractiveness of the coating surface; the silicon carbide anticorrosive material with the thickness of more than 5mm is completely cured after 16 hours at the normal temperature of 24 ℃, the actual curing time is determined according to the coating amount of the material and the ambient temperature, and the thicker the material or the higher the ambient temperature is, the shorter the curing time is; the curing can be accelerated by blowing with a heat gun or irradiating with an iodine-tungsten lamp (heating at about 66 ℃ for 2-3 hours), without using a direct fire source.

The silicon carbide coating is adopted to realize the anticorrosion isolation of the joint, the smearing of materials can be completed on a construction site during the repair, the joint does not need to be transferred and transported, the construction is convenient, the repair operation is convenient, and the time for the round-trip transportation of the joint is saved; meanwhile, when the silicon carbide material is cured and approved, the silicon carbide material can be reused, and the silicon carbide coating has a good corrosion prevention effect and is beneficial to prolonging the service life.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims

1. The joint of the slurry circulating pump of the desulfurization absorption tower is characterized by comprising a pipe body, wherein the pipe body is arranged in a conical shape, the inner wall of the pipe body is coated with a lining anticorrosive layer in a covering manner, and the lining anticorrosive layer is a silicon carbide coating; the inner wall of the pipe body is provided with a fastening adhesive piece, and the lining anticorrosive layer is arranged on the fastening adhesive piece.

2. The joint of the desulfurization absorption tower slurry circulation pump according to claim 1, wherein the fastening adhesive member is a steel wire mesh.

3. The joint of the desulfurization absorption tower slurry circulation pump according to claim 2, wherein the steel wire mesh is fixed on the inner wall of the pipe body by welding.

4. The joint of the desulfurization absorption tower slurry circulation pump according to claim 3, wherein the steel wire mesh is sand-blasted, and the lining anti-corrosion layer is coated on and covers the steel wire mesh.

5. The joint of the desulfurization absorption tower slurry circulation pump according to claim 1, wherein the pipe body is provided at both ends thereof with connection rings, and the connection rings have a diameter larger than that of the end portions of the pipe body.

6. The joint of the slurry circulating pump of the desulfurization absorption tower as recited in claim 5, wherein the connection ring is provided with a plurality of connection holes, and the plurality of connection holes are distributed along a circumferential direction of the connection ring at equal intervals.