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Connecting structure for SO2 flue gas pipelines and expansion joint

A connection structure, SO2 technology, applied in the direction of pipes/pipe joints/fittings, expansion compensation devices for pipelines, pipe components, etc., can solve the problems of flue gas leakage, pollute the environment, affect production, etc., and prolong the service life Effect

Inactive Publication Date: 2018-02-02
CHINA 19TH METALLURGICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, a new expansion joint will be corroded and perforated by condensed acid generated by flue gas condensation in about 3 months under normal conditions, resulting in SO 2 Smoke leakage pollutes the environment
[0003] Because the cost of replacing a stainless steel expansion joint is very high, at least 2 to 3 days of production shutdown is required, and the service life after replacement is too short. Therefore, when a leak occurs, generally only half-joint jackets can be used to seal it with cement. , this method can quickly plug the leak, but the service life is not long, and it cannot adjust the thermal expansion and contraction of the pipeline, which will affect production and pose a safety hazard

Method used

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  • Connecting structure for SO2 flue gas pipelines and expansion joint
  • Connecting structure for SO2 flue gas pipelines and expansion joint
  • Connecting structure for SO2 flue gas pipelines and expansion joint

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The specific manufacturing process of the connection structure described in this application is as follows:

[0026] One, the composition of the connection structure described in this application

[0027] 1. Fabrication of the expansion joint body 1: the expansion body 1 includes "annular ribs", "telescopic corrugations" and "connectors" which are SO 2 A part of the flue gas pipeline 2 is isolated in this application to facilitate replacement. The "ring rib" can be made of 3mm thick 304 stainless steel, the inner diameter of the ring is the outer diameter of the pipe, and the height of the rib should be between 250mm and 300mm. The "stretch corrugation" can be made of 5mm thick 304 stainless steel coil, and the corrugation width should be between 1000mm and 1200mm. The "connecting pipe" is made of 304 stainless steel coiled plate, the length should be between 300mm and 400mm, and the wall thickness of the coiled plate should be equal to the wall thickness of the flue ...

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PUM

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Abstract

The invention discloses a connecting structure, particularly discloses a connecting structure for SO2 flue gas pipelines and an expansion joint, and belongs to the technical field of metallurgy production equipment accessory design and building. According to the connecting structure for the SO2 flue gas pipelines and the expansion joint, the service life of an SO2 flue gas collecting and conveyingpipeline, especially an expansion joint pipeline, can be remarkably prolonged. The connecting structure comprises a corrugated expansion joint body. The SO2 flue gas pipelines are telescopically connected into whole in the axial direction through the corrugated expansion joint body. The connecting structure further comprises an anti-corrosion and corrosion-resisting assembly, and the anti-corrosion and corrosion-resisting assembly is arranged on the inner side of the corrugated expansion joint body. The inner side wall of the corrugated expansion joint body in the operating process is protected through the anti-corrosion and corrosion-resisting assembly.

Description

technical field [0001] The present invention relates to a connection structure, in particular to a SO 2 The invention relates to a connection structure of an expansion joint of a flue gas pipeline, which belongs to the technical field of design and construction of metallurgical production equipment accessories. Background technique [0002] The flue gas produced by the copper smelter contains very heavy sulfur and cannot be discharged into the air, so pipes are used to collect the flue gas to make sulfuric acid. When the temperature of SO2 flue gas is lowered during collection and transportation, a large amount of condensed acid will be produced, which is highly corrosive to metals. The corrugated expansion joints currently on the market are made of thinner materials. 2 During the collection and transportation of the flue gas, the flue gas and the condensed acid produced in direct contact with it will cause serious acid corrosion damage. In actual production, a new expans...

Claims

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Application Information

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IPC IPC(8): F16L51/02
CPCF16L51/02
Inventor 任兆兴陈洪泽尤代富严成钢
Owner CHINA 19TH METALLURGICAL CORP
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