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CN-122014958-A - Scale and corrosion prevention device for copper electrolyte conveying pipeline

CN122014958ACN 122014958 ACN122014958 ACN 122014958ACN-122014958-A

Abstract

The invention discloses a scale and corrosion prevention device for a copper electrolyte conveying pipeline, and relates to the technical field of protection of nonferrous metal smelting equipment. The scale and corrosion prevention device is characterized in that a scale prevention assembly is arranged on the outer side of the outer pipe wall of the conveying pipeline, a flow passage is arranged in the scale prevention assembly, the length of the flow passage is set to be larger than that of the conveying pipeline, a steam inlet on the scale prevention assembly is close to a liquid inlet of the pipeline, a steam outlet is close to a liquid outlet of the pipeline, and meanwhile, an insulating layer is coated on the outer side of the scale prevention assembly, so that when copper electrolyte flows into the conveying pipeline from the liquid inlet, steam flows into the flow passage of the scale prevention assembly from the steam inlet for heat exchange. Because the length of the runner is greater than the length of the conveying pipeline, the heat exchange detention time of the steam outside the conveying pipeline can be obviously prolonged, the steam is ensured to fully release heat, the temperature of the conveying pipeline is stably controlled in a range of 55-90 ℃, the scaling of copper electrolyte caused by cooling is avoided, the continuity and the stability of the conveying process of the copper electrolyte are ensured, the service life of the conveying pipeline is prolonged, and the maintenance cost of a pipeline is reduced.

Inventors

  • BAO XIANGJUN
  • Lu Songpeng
  • LU SHUYOU
  • WANG DI
  • HE XIMIN
  • GAO GUANGHUI
  • TANG HANG
  • DING CHUN
  • Cheng Qianwang
  • HU PENG

Assignees

  • 安徽铜冠产业技术研究院有限责任公司
  • 安徽工业大学

Dates

Publication Date
20260512
Application Date
20260407

Claims (10)

  1. 1. A scale and corrosion inhibiting device for a copper electrolyte delivery conduit, the delivery conduit (100) having a liquid inlet (110), a liquid outlet (120), an outer tube wall (130) and an inner tube wall (140), the scale and corrosion inhibiting device (200) comprising: The scale inhibition assembly (210) is arranged on the outer side of the outer pipe wall (130), a flow passage (220) of steam is arranged in the scale inhibition assembly (210), the length of the flow passage (220) is larger than that of the conveying pipeline (100), the scale inhibition assembly (210) is provided with a steam inlet (230) and a steam outlet (240), the steam inlet (230) is arranged close to the liquid inlet (110), and the steam outlet (240) is arranged close to the liquid outlet (120); and the heat preservation layer (250) is arranged on the outer side of the scale inhibition assembly (210).
  2. 2. The scale and corrosion prevention apparatus for a copper electrolyte delivery conduit as set forth in claim 1, wherein said scale inhibition assembly (210) comprises: an outer sleeve (211) arranged outside the outer tube wall (130) and forming a steam accommodating space with the outer sleeve (211), wherein the steam inlet (230) and the steam outlet (240) are communicated with the accommodating space; And the baffle structure (212) is arranged in the accommodating space, and the baffle structure (212) encloses to form the flow channel (220).
  3. 3. The scale and corrosion prevention apparatus for a copper electrolyte delivery pipe according to claim 2, wherein the baffle structure (212) is a spiral fin (213), an inner side wall of the spiral fin (213) is fixedly connected with the outer pipe wall (130), an outer side wall of the spiral fin (213) is fixedly connected with the outer sleeve (211), and the spiral fin (213) spirally extends along an axial direction of the delivery pipe (100) to form the continuously spirally-closed flow passage (220).
  4. 4. The scale and corrosion prevention apparatus for a copper electrolyte delivery conduit as set forth in claim 2 wherein said baffle structure (212) comprises a plurality of arcuate baffles (214), said arcuate baffles (214) being semi-circular or semi-circular in configuration, a plurality of said arcuate baffles (214) being spaced apart perpendicular to the axial direction of said delivery conduit (100), the edges of said arcuate baffles (214) being connected to said outer tube wall (130) or said outer sleeve (211) and adjacent said arcuate baffles (214) being staggered to form said flow channels (220) in the shape of a dogleg.
  5. 5. The scale and corrosion prevention apparatus for a copper electrolyte delivery pipe according to claim 2, wherein the baffle structure (212) comprises a plurality of annular baffles (215) alternately arranged at intervals, wherein, in any two adjacent annular baffles (215), an inner edge of one annular baffle (215) is fixedly connected with the outer pipe wall (130), and an outer edge of the other annular baffle (215) is fixedly connected with the outer sleeve (211) to form the radial flow channel (220).
  6. 6. The scale and corrosion prevention apparatus for a copper electrolyte delivery conduit according to claim 1, wherein said scale inhibition assembly (210) is a half-pipe structure extending helically along an axis of said delivery conduit (100) and fixedly connected to said outer pipe wall (130), said half-pipe structure enclosing said flow channel (220) forming a continuous helix.
  7. 7. The scale and corrosion prevention apparatus for a copper electrolyte delivery conduit as recited in claim 1 wherein said scale inhibition assembly (210) is a coiled tube structure (216), said coiled tube structure (216) extending helically along an axis of said delivery conduit (100), an inner sidewall of said coiled tube structure (216) being fixedly connected to said outer tube wall (130), said coiled tube structure (216) itself enclosing said flow channel (220) forming a continuous helix.
  8. 8. The scale and corrosion prevention apparatus for a copper electrolyte conveying pipeline according to claim 1, wherein the steam inlet (230) and the steam outlet (240) are both provided with a first connecting joint (217), the liquid inlet (110) and the liquid outlet (120) are both provided with a second connecting joint (150), and the first connecting joint (217) and the second connecting joint (150) are flange interfaces.
  9. 9. The scale and corrosion inhibiting device for copper electrolyte delivery pipes according to claim 1, wherein the inner pipe wall (140) is provided with a corrosion inhibiting layer (260), the corrosion inhibiting layer (260) satisfying: The adhesive force of the coating is more than or equal to 6MPa and/or, After soaking in 60 ℃ copper electrolyte for 1000 hours, the anti-corrosion layer (260) is free from falling off and cracking, and/or, The thickness of the anti-corrosion layer (260) is 0.4-1.0mm.
  10. 10. The scale and corrosion inhibiting device for copper electrolyte delivery pipes according to claim 1, wherein the thickness of the insulation layer (250) is 40-70mm.

Description

Scale and corrosion prevention device for copper electrolyte conveying pipeline Technical Field The invention relates to the technical field of nonferrous metal smelting equipment protection, in particular to a scale and corrosion prevention device for a copper electrolyte conveying pipeline. Background In the electrolytic refining process of copper, the generated copper electrolyte contains high-concentration sulfuric acid, copper sulfate and various impurities, and has extremely strong corrosiveness. In the conveying pipeline, the temperature at the inlet of the copper electrolyte is high, and the conveying pipeline lacks an effective active temperature control design, so that the temperature of the pipe wall is reduced due to the environmental temperature difference. The solubility of the electrolyte decreases with decreasing temperature, resulting in rapid precipitation and deposition of copper sulfate and impurity crystals on the pipe wall, forming a hard scale layer, and in severe cases even clogging the pipe. At present, a similar technology can add heat preservation cotton on the outer side of a conveying pipeline, but the heat preservation effect is limited. There are also some technologies that use additional processes to remove impurities in the copper electrolyte, for example, application number CN201310472852.6 discloses a comprehensive treatment method for removing antimony bismuth impurities in the copper electrolyte, and the comprehensive treatment method including ceramic ultrafiltration, ion exchange and membrane technology is adopted, and the chelating resin adsorption and regeneration are combined with chemical treatment to remove antimony bismuth impurities in the copper electrolyte, so as to avoid system blockage and reduce energy consumption. However, the above patent needs to set an additional process flow, and the filtrate is added into the temperature control tank to control the temperature, so that the copper sulfate is prevented from being cooled and crystallized, but the copper electrolyte after antimony bismuth is removed flows into the conveying pipeline again, and the copper sulfate is still cooled and crystallized again due to the temperature reduction. Disclosure of Invention Based on the above, the invention provides a scale and corrosion prevention device for a copper electrolyte conveying pipeline, which can maintain the temperature of the conveying pipeline through a scale prevention component and an insulating layer, and avoid the scaling of the copper electrolyte caused by cooling. The invention provides a scale and corrosion prevention device for a copper electrolyte conveying pipeline, which is provided with a liquid inlet, a liquid outlet, an outer pipe wall and an inner pipe wall, and comprises: the scale inhibition assembly is arranged on the outer side of the outer pipe wall, and is internally provided with a flow passage of steam, and the length of the flow passage is longer than that of the conveying pipeline; the heat preservation layer is arranged at the outer side of the scale inhibition assembly. In some embodiments, the scale inhibition assembly comprises: the outer sleeve is arranged on the outer side of the outer pipe wall, a steam accommodating space is formed between the outer sleeve and the outer sleeve, and the steam inlet and the steam outlet are communicated with the accommodating space; And the baffle structure is arranged in the accommodating space and surrounds the flow passage. In some embodiments, the baffle structure is a spiral fin, an inner side wall of the spiral fin is fixedly connected with the outer pipe wall, an outer side wall of the spiral fin is fixedly connected with the outer sleeve, and the spiral fin spirally extends along an axial direction of the conveying pipeline to form the continuous spiral closed flow channel. In some embodiments, the baffle structure comprises a plurality of arched baffles, the arched baffles are in a semicircular or non-circular structure, the arched baffles are arranged at intervals perpendicular to the axial direction of the conveying pipeline, the edges of the arched baffles are connected with the outer pipe wall or the outer sleeve, and adjacent arched baffles are distributed in a staggered manner to form the folded-line-shaped flow channel. In some embodiments, the baffle structure comprises a plurality of annular baffles arranged alternately at intervals, wherein in any two adjacent annular baffles, the inner edge of one annular baffle is fixedly connected with the outer tube wall, and the outer edge of the other annular baffle is fixedly connected with the outer sleeve to form the radial flow channel. In some embodiments, the scale inhibiting assembly is a half-pipe structure extending helically along the axis of the delivery conduit and fixedly connected to the outer pipe wall, the half-pipe structure enclosing the flow passage forming a continuous helix. In some embodiments, the scale inhibiti