CN100485089C - Fan rotor treatment method of smoke purifying system for steel plant - Google Patents
Fan rotor treatment method of smoke purifying system for steel plant Download PDFInfo
- Publication number
- CN100485089C CN100485089C CNB2007100539055A CN200710053905A CN100485089C CN 100485089 C CN100485089 C CN 100485089C CN B2007100539055 A CNB2007100539055 A CN B2007100539055A CN 200710053905 A CN200710053905 A CN 200710053905A CN 100485089 C CN100485089 C CN 100485089C
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- rotor
- fan
- purifying system
- steel plant
- smoke purifying
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Treatment of fan rotor for smoke purifying system in steel plant is carried out by adding into corrosion inhibitor 1-3wt% and inorganic acid solution 23-25wt% while cleaning rotor for 3.5-4hrs, putting rotor into soda solution 1.5-2wt% while neutralizing for 0.4-0.6hrs, putting rotor into sodium nitrite solution 4-6wt%, deactivating for 2-3hrs, hanging and drying. The corrosion inhibitor is hexamine, inorganic acid is hydrochloric acid and soda solution is ammonia spirit. It costs low and has long life.
Description
Technical field
The invention belongs to material surface chemical treatment method field, particularly a kind of fan rotor treatment of smoke purifying system for steel plant.
Background technology
The steelworks flue gas purification system fan rotor foundry loam amount that is in operation is bigger, and the mass force that produces during the rotor running will cause additional velocity pressure in kinematic pair, and these mass force pass on the blower foundation.Because the size of these mass force and direction all are to change in the cycle, produce forced vibration so will cause blower fan, cause the fan vibration value higher, various spare part losses and expense increase.At rotor, traditional treatment process is: when the fan rotor vibration values exceeds standard, in time open casing and clean fan blade with water blast gun, the cleaning dirty fan blade that causes in fan blade a part must to occur unbalance for the restriction of narrow and small and site environment because of the blower fan air channel, certainly will do transient equilibrium to rotor, form for this reason and vibrate, clean, do transient equilibrium vicious cycle situation, owing to frequently fan rotor is done transient equilibrium, each new rotor is done transient equilibrium about 4 times, impeller of blower to scrapping the time limit, need more renew fan rotor.
Summary of the invention
The object of the invention is to provide a kind of fan rotor treatment of smoke purifying system for steel plant, and fan rotor has thoroughly overcome after special processing because of cleaning dirty frequently does dynamically balanced problem, has prolonged fan blade work-ing life, has reduced production cost.
For reaching above-mentioned purpose, the present invention adopts following and the book scheme: fan rotor treatment of smoke purifying system for steel plant, comprise the steps: (1) pickling: the inorganic acid aqueous solution rotor washing of 23-25wt% of usefulness adding 1-3wt% stopping agent 3.5-4 hour makes rotor expose metalluster; (2) neutralization: the rotor after the pickling is put into the alkali aqueous solution of 1.5-2wt% and 0.4-0.6 hour; (3) passivation: the rotor after will neutralizing is put into the sodium nitrite in aqueous solution passivation 2-3 hours of 4-6wt%; (4) hang out and dry.
Stopping agent is a urotropine, and mineral acid is a hydrochloric acid, and alkali aqueous solution is an ammoniacal liquor.
Among the present invention, mineral acid is a non-oxidizing acid, and the stopping agent effect is to slow down the corrosive nature of mineral acid to rotor, can form one deck protectiveness passive film at rotor surface after handling in the sodium nitrite in aqueous solution.
Utilize the present invention, only need carry out pickling, neutralization, passivation to fan rotor, do processing such as statical equilibrium, fan rotor does not need to do transient equilibrium again, and operation conditions is good.Steady because of fan operation, bearing and component loss greatly reduce.What is more important has been completely abolished fan rotor because of the cleaning dirty problem of frequently doing the transient equilibrium processing, and fan blade prolongs work-ing life, and production cost greatly reduces.
Utilize the present invention in January, 2006 the steelworks D700 of Jiyuan iron and steel group company fan rotor to be carried out application test, handling the every index in back has all had very big raising.In by the end of July, 2006, and steelworks is rechecked the D700 fan rotor, and three rotor oscillation detected values are 23 μ m, 35 μ m, 54 μ m, all within fan vibration value allowed band.
Following table be utilize traditional treatment method to handle 2004,2005 of rotor and 1-July in 2006 of utilizing the present invention to handle rotor change the spare part tricks, make the transient equilibrium number, the total expenses account of payments:
| Time | Change bearing (cover) | Exchanging rotor (cover) more | Do transient equilibrium (individual) | Total expenses (ten thousand yuan) |
| 2004 | 58 | 7 | 20 | 40 |
| 2005 | 52 | 8 | 22 | 45 |
| 2006 (1-July) | 1 | 0 | 0 | 0.1 |
By table as seen, utilize the present invention after, the spare part expense reduces significantly, greatly reduces production cost, enterprise competitiveness increase.
Embodiment
Embodiment 1, fan rotor treatment of smoke purifying system for steel plant, comprise the steps: (1) pickling: with adding 1wt% (weight percent concentration, down together) the aqueous hydrochloric acid rotor washing of the 23wt% of urotropine is 3.5 hours, makes rotor expose metalluster; (2) neutralization: the rotor after the pickling is put into the ammoniacal liquor of 1.5wt% and 0.4 hour; (3) passivation: the rotor after will neutralizing is put into the sodium nitrite in aqueous solution passivation 2 hours of 4wt%; (4) hang out and dry.
Embodiment 2, fan rotor treatment of smoke purifying system for steel plant, comprise the steps: (1) pickling: with adding 2wt% (weight percent concentration, down together) the aqueous hydrochloric acid rotor washing of the 24wt% of urotropine is 3.75 hours, makes rotor expose metalluster; (2) neutralization: the rotor after the pickling is put into the ammoniacal liquor of 1.75wt% and 0.5 hour; (3) passivation: the rotor after will neutralizing is put into the sodium nitrite in aqueous solution passivation 2.5 hours of 5wt%; (4) hang out and dry.
Embodiment 3, fan rotor treatment of smoke purifying system for steel plant, comprise the steps: (1) pickling: with adding 3wt% (weight percent concentration, down together) the aqueous hydrochloric acid rotor washing of the 25wt% of urotropine is 4 hours, makes rotor expose metalluster; (2) neutralization: the rotor after the pickling is put into the ammoniacal liquor of 2wt% and 0.6 hour; (3) passivation: the rotor after will neutralizing is put into the sodium nitrite in aqueous solution passivation 3 hours of 6wt%; (4) hang out and dry.
Claims (2)
1, fan rotor treatment of smoke purifying system for steel plant is characterized in that, comprises the steps: (1) pickling: the inorganic acid aqueous solution rotor washing of 23-25wt% of usefulness adding 1-3wt% stopping agent 3.5-4 hour makes rotor expose metalluster; (2) neutralization: the rotor after the pickling is put into the alkali aqueous solution of 1.5-2wt% and 0.4-0.6 hour; (3) passivation: the rotor after will neutralizing is put into the sodium nitrite in aqueous solution passivation 2-3 hours of 4-6wt%; (4) hang out and dry.
2, fan rotor treatment of smoke purifying system for steel plant as claimed in claim 1 is characterized in that, stopping agent is a urotropine, and mineral acid is a hydrochloric acid, and alkali aqueous solution is an ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100539055A CN100485089C (en) | 2007-01-25 | 2007-01-25 | Fan rotor treatment method of smoke purifying system for steel plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100539055A CN100485089C (en) | 2007-01-25 | 2007-01-25 | Fan rotor treatment method of smoke purifying system for steel plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029388A CN101029388A (en) | 2007-09-05 |
| CN100485089C true CN100485089C (en) | 2009-05-06 |
Family
ID=38714937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100539055A Expired - Fee Related CN100485089C (en) | 2007-01-25 | 2007-01-25 | Fan rotor treatment method of smoke purifying system for steel plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485089C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735801B (en) * | 2020-12-22 | 2022-05-13 | 横店集团东磁股份有限公司 | Modified nanocrystalline strip and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB960346A (en) * | 1962-01-15 | 1964-06-10 | Borg Holding A G | Method of treating metal surfaces and application of the method |
| US4430128A (en) * | 1980-12-05 | 1984-02-07 | The Dow Chemical Company | Aqueous acid composition and method of use |
-
2007
- 2007-01-25 CN CNB2007100539055A patent/CN100485089C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB960346A (en) * | 1962-01-15 | 1964-06-10 | Borg Holding A G | Method of treating metal surfaces and application of the method |
| US4430128A (en) * | 1980-12-05 | 1984-02-07 | The Dow Chemical Company | Aqueous acid composition and method of use |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101029388A (en) | 2007-09-05 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20130125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |