CN102618679A - Anti-corrosion pipeline for dry dedusting of blast furnace gas - Google Patents
Anti-corrosion pipeline for dry dedusting of blast furnace gas Download PDFInfo
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- CN102618679A CN102618679A CN201210069374XA CN201210069374A CN102618679A CN 102618679 A CN102618679 A CN 102618679A CN 201210069374X A CN201210069374X A CN 201210069374XA CN 201210069374 A CN201210069374 A CN 201210069374A CN 102618679 A CN102618679 A CN 102618679A
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- furnace gas
- expansion joint
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Abstract
The invention discloses an anti-corrosion pipeline for dry dedusting of blast furnace gas, belongs to metal surface anti-corrosion, and in particular relates to a pipeline for dry dedusting of blast furnace gas. The pipeline consists of a metal pipeline, an expansion joint and a drainer; two ends of the expansion joint are connected with the pipeline through flanges; the lower half part of the pipeline is provided with the drainer; and the pipeline is characterized in that: the lower part of the inner wall of the pipeline is provided with an anticorrosive coating; the inner wall of the pipeline and the anticorrosive coating are coated with anti-corrosion paint; the inner wall of the drainer is coated with anti-corrosion paint; and the expansion joint is a steel-plastic composite corrugated pipe. Compared with the prior art, the anti-corrosion pipeline has the advantages that: the pipeline is novel in concept, simple in structure, easy to manufacture, low in cost, acid resistant, heat resistant, corrosion resistant, long in service life, low in maintenance and operating cost, and low in spare part consumption, eliminates potential safety hazards of gas leakage, ensures safe operation of dry dedusting of the blast furnace gas, has a dry dedusting function, is intact after being used for 4 years and obvious in effect, and has promotion and application value for building or transforming a blast furnace gas dedusting system.
Description
Technical field
It is anticorrosion to the invention belongs to the metallic surface, relates in particular to blast furnace gas dry dusting and uses pipeline.
Background technology
Blast furnace adds various crude fuels in smelting process, its quality treatment process is different, makes in forming the blast furnace gas process, to produce HCL, SO
2, SO
3Deng sour gas.In the blast furnace gas wet dedusting, these sour gas get into after water washing in the detention tank, dosing neutralization, and content of acid gas such as HCL is few in the purified gas ,≤300 mg/l.In recent years, dry dedusting technology widespread use on large blast furnace.Compare with wet dedusting, have water saving, power saving, environmental protection, reduce operation and maintenance cost, the generated energy 30% that improves stock gas top pressure power generation TRT is with first-class remarkable advantage.But in blast furnace gas dry dusting, content of acid gas such as HCL is higher in the purified gas, after the TRT generating; Because temperature, pressure reduce, these acid gas condensation are separated out, and are deposited in duct bottom along tube wall; Form the very strong liquid of corrosion, pH value reaches 1-2, and medium is a hydrogenchloride; Content reaches 6000-8000mg/l, and it is mobile that air-flow promotes inner-walls of duct bottom, lower edge in pipe, and with the inner wall surface chemical reaction; Destroy its structure and form corrosion layer,, finally cause duct bottom perforation, gas leakage along with the corrosion aggravation.1000 m of our company
3Blast furnace was gone into operation in May, 2005, and how the gas line corrosion failure promptly takes place the half a year of going into operation blast furnace gas dry dusting, and blast furnace be compelled damping down, influences blast furnace production, so had restricted the performance of dry dedusting technology advantage and apply.
Summary of the invention
In order to overcome the defective that prior art exists, the purpose of this invention is to provide a kind of blast furnace gas dry dusting anti-corrosion pipeline.Use this pipeline can stop of the corrosion of acidic substance such as HCL, prolong pipeline work-ing life, eliminate safety in production hidden danger, the blast furnace gas dry dusting technical superiority is not fully exerted and applies, guarantee that blast furnace ironmaking production carries out smoothly metallic conduit.
The blast furnace gas dry dusting anti-corrosion pipeline is made up of metallic conduit, expansion joint and hydathode.The expansion joint two ends are by flange and pipe connection, and the pipeline Lower Half is established hydathode, are characterized in that the inner-walls of duct Lower Half establishes preservative coat, and inner-walls of duct and preservative coat are smeared anticorrosion enamelled coating, and the hydathode inwall is smeared antifouling paste; Expansion joint is that steel is moulded compound glass stria tube.
The present invention further improves, and described preservative coat is made up of steel fabric sheet and KPI acidproof heat-proof material, and steel fabric sheet is welded on the interior Lower Half of metallic conduit and makes skeleton, and the spraying of acidproof heat-proof material is cemented in makes liner, coating thickness 8-12mm on the steel fabric sheet.
The present invention further improves, and described acidproof heat-proof material is a solidifying agent by condensation of aluminum phosphate, and sieve and silica-sesquioxide is an aggregate.
The present invention further improves, and described antifouling paste is Vinylite glass flake lacquer, smearing thickness 200-260 μ m, and it is tight to have a surface, and the penetrant path length is acidproof, heatproof 100--130 ℃.
Last improvement of the present invention, the corrosion-inhibiting layer that described expansion joint is made up of stainless steel and macromolecular material, corrosion preventing layer, structural sheet are composited, and can resist the corrosion of all acids gas phases, liquid phase medium.
Compared with prior art, advantage is: novel, simple in structure, to make easily, and cost is low; Acidproof, the heatproof of pipeline, corrosion-resistant, prolong work-ing life greatly, and the maintenance working cost is low, and spare parts consumption is few, has eliminated the potential safety hazard of gas leak; Guaranteed the blast furnace gas dry dusting safe operation, the dry method dust advantage has obtained giving full play to, and uses over 4 years, and pipeline is still intact, and particular significant effect has application value in the construction of dedusting of blast furnace gas system or in transforming.
Description of drawings
The contrast accompanying drawing is described further the present invention below.
Fig. 1 is a blast furnace gas dry dusting anti-corrosion pipeline structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 Fig. 1 is the steel fabric sheet synoptic diagram.
Embodiment
Can be found out that by Fig. 1 Fig. 2 and Fig. 3 the anticorrosion road of the present invention is to be made up of metallic conduit 1, expansion joint 2 and hydathode 3, the expansion joint two ends are connected with metallic conduit by flange 4; Hydathode is established in the pipeline bottom, and Lower Half tiling steel fabric sheet 7 is fixing by the electric welding welding in the pipeline; With 8 slurrying of KPI acidproof heat-proof material, be sprayed on and make preservative coat 5, thickness 10mm on the steel fabric sheet; After waiting to solidify drying; Evenly smear three road Vinylite scale lacquers 6, per pass thickness 80 μ m, paint film total thickness 250 μ m at whole pipe inwall (containing preservative coat) again.It is anticorrosion that the inwall of hydathode is also smeared Vinylite scale lacquer.Expansion joint adopts the corrosion-inhibiting layer, corrosion preventing layer and the structural sheet that are made up of stainless steel and macromolecular material to be composited.Like this, metal pipe internal wall and acidic medium are all intercepted by preservative coat and anticorrosion enamelled coating, solve the corrosion damage problem of metallic conduit effectively, guarantee the dry method dust safe operation.
Claims (5)
1. the blast furnace gas dry dusting anti-corrosion pipeline is made up of metallic conduit (1), expansion joint (2) and hydathode (3); The expansion joint two ends are connected with pipeline (1) by flange (4); Hydathode (3) is established in the pipeline bottom; It is characterized in that the inner-walls of duct Lower Half establishes preservative coat (5), inner-walls of duct and preservative coat are smeared anticorrosion enamelled coating (6); The hydathode inwall is smeared antifouling paste; Expansion joint is that steel is moulded compound glass stria tube.
2. blast furnace gas dry dusting anti-corrosion pipeline according to claim 1 is characterized in that described preservative coat is made up of steel fabric sheet (7) and KPI acid-resistant and heat-resistant material (8); Steel fabric sheet is welded on the metal pipe internal wall Lower Half and makes skeleton, and the acidproof heat-proof material sprays, is cemented on the steel fabric sheet coating thickness 8-12mm.
3. blast furnace gas dry dusting anti-corrosion pipeline according to claim 2 is characterized in that the acidproof heat-proof material is a solidifying agent by condensation of aluminum phosphate, and sieve and silica-sesquioxide is an aggregate.
4. blast furnace gas dry dusting anti-corrosion pipeline according to claim 1 is characterized in that described antifouling paste is Vinylite glass flake lacquer, and smearing thickness 200-260 μ m is acidproof, 100-130 ℃ of heatproofs.
5. blast furnace gas dry dusting anti-corrosion pipeline according to claim 1 is characterized in that the corrosion-inhibiting layer that described expansion joint is made up of stainless steel and macromolecular material, and corrosion preventing layer, structural sheet are composited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069374XA CN102618679A (en) | 2012-03-16 | 2012-03-16 | Anti-corrosion pipeline for dry dedusting of blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069374XA CN102618679A (en) | 2012-03-16 | 2012-03-16 | Anti-corrosion pipeline for dry dedusting of blast furnace gas |
Publications (1)
| Publication Number | Publication Date |
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| CN102618679A true CN102618679A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210069374XA Pending CN102618679A (en) | 2012-03-16 | 2012-03-16 | Anti-corrosion pipeline for dry dedusting of blast furnace gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979967A (en) * | 2012-11-29 | 2013-03-20 | 西安交通大学 | Installation structure convenient for disassembling and assembling expansion joint of heat transfer casing |
| CN103436647A (en) * | 2013-09-04 | 2013-12-11 | 济钢集团有限公司 | Open type water-sealed valve chamber of dry type blast furnace gas holder |
| CN107725919A (en) * | 2018-01-11 | 2018-02-23 | 镇江市星耀智能装备有限公司 | A kind of pipeline of anti-corrosion antidetonation |
| CN107725970A (en) * | 2017-09-29 | 2018-02-23 | 镇江市星耀智能装备有限公司 | A kind of protection device for pipeline |
| CN107825070A (en) * | 2017-10-20 | 2018-03-23 | 中交广州航道局有限公司 | Dredging pipe and its processing method |
Citations (3)
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| CN1186830A (en) * | 1996-12-29 | 1998-07-08 | 河南省南阳市希能化学工业总厂 | Acid-proof, heat-resisting and corrosion resistant daub and preparing method |
| CN2619125Y (en) * | 2003-06-18 | 2004-06-02 | 赵长增 | Prestress composite glass-ceramic tube |
| CN202519282U (en) * | 2012-03-16 | 2012-11-07 | 马钢(集团)控股有限公司 | Dry dust removal anti-corrosive pipeline of blast furnace gas |
-
2012
- 2012-03-16 CN CN201210069374XA patent/CN102618679A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1186830A (en) * | 1996-12-29 | 1998-07-08 | 河南省南阳市希能化学工业总厂 | Acid-proof, heat-resisting and corrosion resistant daub and preparing method |
| CN2619125Y (en) * | 2003-06-18 | 2004-06-02 | 赵长增 | Prestress composite glass-ceramic tube |
| CN202519282U (en) * | 2012-03-16 | 2012-11-07 | 马钢(集团)控股有限公司 | Dry dust removal anti-corrosive pipeline of blast furnace gas |
Non-Patent Citations (1)
| Title |
|---|
| 曹勇杰，袁琦，肖慧敏: "干法除尘工艺高炉煤气管道内防腐复合技术", 《冶金动力》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979967A (en) * | 2012-11-29 | 2013-03-20 | 西安交通大学 | Installation structure convenient for disassembling and assembling expansion joint of heat transfer casing |
| CN103436647A (en) * | 2013-09-04 | 2013-12-11 | 济钢集团有限公司 | Open type water-sealed valve chamber of dry type blast furnace gas holder |
| CN107725970A (en) * | 2017-09-29 | 2018-02-23 | 镇江市星耀智能装备有限公司 | A kind of protection device for pipeline |
| CN107825070A (en) * | 2017-10-20 | 2018-03-23 | 中交广州航道局有限公司 | Dredging pipe and its processing method |
| CN107725919A (en) * | 2018-01-11 | 2018-02-23 | 镇江市星耀智能装备有限公司 | A kind of pipeline of anti-corrosion antidetonation |
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Application publication date: 20120801 |