CN102716921A - Use method of cleaning section alkali liquor on continuous annealing production line - Google Patents
Use method of cleaning section alkali liquor on continuous annealing production line Download PDFInfo
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- CN102716921A CN102716921A CN2012102115689A CN201210211568A CN102716921A CN 102716921 A CN102716921 A CN 102716921A CN 2012102115689 A CN2012102115689 A CN 2012102115689A CN 201210211568 A CN201210211568 A CN 201210211568A CN 102716921 A CN102716921 A CN 102716921A
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Abstract
The invention discloses a use method of cleaning section alkali liquor on a continuous annealing production line. The method comprises the following steps that when the conductivity and the liquid level of the alkali liquor cleaning section are controlled, the flowing direction of cleaning agents along the alkali liquor cleaning section is opposite to the moving direction of band steel, and the alkali liquor cleaning section comprises an electrolysis cleaning section and a spray brushing washing section; and when the liquid level of the spray brushing washing section is controlled, the alkali liquor of the electrolysis cleaning section flows to the spray brushing cleaning section. The use method of the cleaning section alkali liquor on the continuous annealing production line provided by the invention has the advantages that desalted water and band steel completely realize reverse cleaning, new alkali liquor is prepared in the electrolysis cleaning section, the gradual cleaning of the alkali liquor is ensured, the water quality of subsequent groove bodies is obviously improved, and the surface quality requirement of the band steel is improved.
Description
Technical field
The present invention relates to cold rolled sheet cleaning and degreasing technical field, particularly a kind of method for using of on continuous annealing production line, cleaning section alkali lye.
Background technology
Belt steel surface total residual after cold rolling some ROLLING OIL, iron powder and other pollutant.Cleaning section is exactly the removing residues with the cold-strip steel surface, guarantee the cleaning quality of band steel, and the clean-up performance of alkali lye is most important for surface quality of products.
Move back in cold rolling company and to clean in the section, clean that the segment process groove is divided into mainly that No. 1 spary is washed, No. 2 sparies are washed, electrolytic cleaned, No. 3 brush machines, rinsing.Its process chart is as shown in Figure 1; Clean the segment process groove corresponding respectively No. 1 alkali lye circulating slot, No. 2 alkali lye circulating slots, electrolytic lye circulating slot, No. 3 brush machine circulating slots, rinse cycle groove; The flow direction of its alkali lye is as shown in Figure 1; The problem that former design exists is that 1, No. 2 spary is washed with electrolysis and become 2 isolated cell bodies, between do not have pipeline to connect, more can't realize automatic control.The band steel is in cleaning section process of cleaning; Because the continuous accumulation of belt steel surface greasy filth, alkali lye is dirty gradually, particularly electrolysis section; The consequence of bringing is: 1. electrolysis section alkali lye steel going along with can get into the desalted water circulating slot of No. 3 brush machines and rinsing; Electrolysis section alkali lye is dirty more, and is serious more to the water pollution of back, reduces cleaning quality; 2. electrolytic cell need clean out a large amount of greasy filth as an isolated cell body during maintenance, guarantees the spatter property of alkali lye; 3. in order to keep the spatter property of alkali lye, the alkali lye that often discharge No. 1 circulating slot and electrolytic cell simultaneously guarantees the cleaning quality with steel.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for using of on continuous annealing production line, cleaning section alkali lye, solves traditional electrolysis and spary soda liquid independently cleaning dirty, alkali lye consumption height, the technology brought of cleaning model clear up the big defective of labour intensity.
For solving the problems of the technologies described above; The invention provides a kind of method for using of on continuous annealing production line, cleaning section alkali lye; Comprise: when the electrical conductivity of controlling alkali lye cleaning section and liquid level; Make cleaning agent clean the flow direction of section and be with the direction of motion of steel opposite along alkali lye, said alkali lye cleans section and comprises the electrolytic cleaned section and spray brushing stage; When the liquid level of brushing stage was sprayed in control, the alkaline stream that makes the electrolytic cleaned section was to the spray brushing stage.
Method for using of on continuous annealing production line, cleaning section alkali lye provided by the invention; Desalted water and the complete reverse cleaning of band steel, new alkali lye is configured in the electrolytic cleaned section, has guaranteed that alkali lye cleans gradually; The water quality of back cell body is obviously improved, improved the requirement of strip surface quality.
Description of drawings
The cleaning segment process flow process of on continuous annealing production line, cleaning the method for using of section alkali lye that Fig. 1 provides for the embodiment of the invention;
The schematic flow sheet that on continuous annealing production line, cleans the method for using of section alkali lye that Fig. 2 provides for the embodiment of the invention.
The specific embodiment
Referring to Fig. 1 and Fig. 2; The method for using of cleaning section alkali lye on continuous annealing production line that the embodiment of the invention provides; Wherein, Cleaning section comprises alkali lye cleaning section and desalted water cleaning section and oven dry section, and the alkali lye cleaning section comprises electrolytic cleaned section and spray brushing stage, and the desalted water cleaning section comprises rinsing section and brush machine section; And rinsing section, brush machine section, electrolytic cleaned section and spray brushing stage are by arranging with the opposite direction of the band steel direction of motion.This method comprises: when the electrical conductivity of controlling alkali lye cleaning section circulating slot or liquid level, make cleaning agent clean the flow direction of section and be with the direction of motion of steel opposite along alkali lye, cleaning agent comprises alkali lye and desalted water.When the liquid level of control spray brushing stage circulating slot, the alkaline stream that makes the electrolytic cleaned section is to the spray brushing stage;
Wherein, the electrical conductivity of control alkali lye cleaning section comprises: when the electrical conductivity of alkali lye cleaning section circulating slot is lower than under its electrical conductivity in limited time, add alkali lye toward this alkali lye cleaning section circulating slot.
The liquid level of control alkali lye cleaning section comprises: when the liquid level of alkali lye cleaning section circulating slot be lower than its liquid level following in limited time; To be the circulating slot of benchmark in this alkali lye cleaning section of alkali lye adding of preceding adjacent alkali lye cleaning section with the band steel direction of motion, the desalted water that perhaps will brush the machine section adds the circulating slot of this alkali lye cleaning section;
Electrical conductivity and liquid level that control alkali lye cleans section comprise: when the electrical conductivity of alkali lye cleaning section circulating slot is lower than the lower limit of its electrical conductivity; Liquid level also is lower than the following of its liquid level and prescribes a time limit; To be that benchmark adds this alkali lye cleaning section at the alkali lye of preceding adjacent cleaning section at first with the band steel direction of motion; Perhaps add desalted water, clean section toward this alkali lye then and add alkali lye.
Wherein, electrolytic cleaned section, spray brushing stage alkali lye separately recycle separately.
Be the concrete operations of on continuous annealing production line, cleaning the method for using of section alkali lye that the embodiment of the invention provides below:
The band steel at first gets into the spray brushing stage No. 1, immerses in the alkali lye of this section circulating slot, cleans; And scrub by No. 1 brush machine, after extracting through squeeze roll then, gets into No. 2 and spray brushing stage; Immerse in the alkali lye of this section circulating slot, clean, and scrub by No. 2 brush machines; After extracting through squeeze roll again then, get into the electrolytic cleaned section and carry out electrolytic cleaned, remove the spot of band steel recess; The alkali lye section gets into the desalted water wash phase after cleaning and accomplishing, and cleans in brush machine section, rinsing section successively, gets into the oven dry section at last and dries.
In cleaning process, for guaranteeing cleaning performance, must make the electrical conductivity of the alkali lye that sprays brushing stage, electrolytic cleaned section and the bound that liquid level reaches each circulating slot, following table promptly is that each cleans the electrical conductivity of section circulating slot and the bound or the target zone of liquid level:
Below be that alkali lye cleans the electrical conductivity of section circulating slot and the control method of liquid level:
1, when the alkali lye circulating slot electrical conductivity of No. 1 spray brushing stage is lower than the lower limit 40ms/cm of this groove electrical conductivity, adds alkali lye, make the alkali lye circulating slot electrical conductivity of No. 1 spray brushing stage reach 40-50ms/cm.The cycle detection time stopped 50 seconds for adding 6 seconds alkali lye, and reciprocation cycle reaches 40-50ms/cm up to electrical conductivity.
2, when the alkali lye circulating slot electrical conductivity of No. 2 spray brushing stages is lower than the lower limit 40ms/cm of this groove electrical conductivity, add new alkali lye, make the alkali lye circulating slot electrical conductivity of No. 2 spray brushing stages reach 40-50ms/cm.The cycle detection time does, adds 6 seconds new alkali lye, stops 50 seconds, and reciprocation cycle reaches 40-50ms/cm up to electrical conductivity.
3, be lower than the lower limit of this tank liquor position when the alkali lye circulating slot liquid level of No. 1 spray brushing stage, promptly 40% of this circulating slot degree of depth o'clock, pay the utmost attention to and add the alkali lye that sprays the circulating slot of brushing stages for No. 2, secondly be No. 3 brush machine desalted waters, can also add the two simultaneously.If the addition manner of one of both is a manual mode, then system can select a kind of automatic interpolation supplement mode in addition automatically.When liquid level is lower than the low alarm liquid level, add new desalted water.
4, be lower than the lower limit of this tank liquor position when the alkali lye circulating slot liquid level of No. 2 spray brushing stages, promptly 40% of this circulating slot degree of depth o'clock, pay the utmost attention to the circulating slot alkali lye that adds the electrolytic cleaned section, secondly be No. 3 brush machine desalted waters, can also add the two simultaneously.If the addition manner of one of both is a manual mode, then system can select a kind of automatic interpolation arbitrary way in addition automatically.When liquid level is lower than the low alarm liquid level, add new desalted water.
5, when the circulating slot liquid level of No. 1 spray brushing stage is lower than the lower limit of this tank liquor position; Promptly 40% of this circulating slot degree of depth; When electrical conductivity also is lower than the lower limit 40ms/cm of this groove electrical conductivity; Should be earlier the alkali lye of the circulating slot of No. 2 spray brushing stages be added the circulating slot of No. 1 spray brushing stage or add desalted water and replenish liquid level, consider whether to add new alkali lye according to the electrical conductivity size again.
6, when the circulating slot liquid level of No. 2 spray brushing stages is lower than the lower limit of this tank liquor position; Promptly 40% of this circulating slot degree of depth; When electrical conductivity also is lower than the lower limit 40ms/cm of this groove electrical conductivity; Should be earlier the alkali lye of the circulating slot of electrolytic cleaned section or desalted water be added No. 2 spray brushing stages and replenish liquid level, consider whether to add new alkali lye according to electrical conductivity again.
7, when the circulating slot electrical conductivity of electrolytic cleaned section is lower than the lower limit 50ms/cm of this groove electrical conductivity, directly adds alkali lye and regulate, make it reach 50-80ms/cm.
Method for using of on continuous annealing production line, cleaning section alkali lye provided by the invention, desalted water, alkali lye the two and the complete reverse cleaning of band steel, and control the adverse current of alkali lye automatically.If the liquid level of certain circulation cell body be lower than its liquid level lower limit the time, add alkali lye automatically by the back cell body that circulates; If liquid level is higher than going up in limited time of its liquid level, stop to add alkali lye, use control program to realize the reverse cleaning of alkali lye, thereby guaranteed that alkali lye cleans gradually, the water quality of back cell body is obviously improved, improve the requirement of strip surface quality.
It should be noted last that; The above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to instance the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. a method for using of on continuous annealing production line, cleaning section alkali lye is characterized in that, comprises:
When the electrical conductivity of controlling the alkali lye cleaning section or liquid level, make cleaning agent opposite with the direction of motion of band steel along the flow direction of alkali lye cleaning section, said alkali lye cleaning section comprises electrolytic cleaned section and spray brushing stage;
Wherein, when the liquid level of control spray brushing stage, the alkaline stream that makes said electrolytic cleaned section is to the spray brushing stage.
2. method for using of on continuous annealing production line, cleaning section alkali lye as claimed in claim 1 is characterized in that, the electrical conductivity that said control alkali lye cleans section comprises:
When the electrical conductivity of alkali lye cleaning section is lower than under its electrical conductivity in limited time, add alkali lye toward this alkali lye cleaning section.
3. method for using of on continuous annealing production line, cleaning section alkali lye as claimed in claim 1 is characterized in that, the liquid level that said control alkali lye cleans section comprises:
The liquid level of cleaning section when alkali lye is lower than its liquid level following in limited time, will to be benchmark add this alkali lye at the alkali lye of preceding adjacent cleaning section cleans section with the band steel direction of motion, perhaps add desalted water.
4. method for using of on continuous annealing production line, cleaning section alkali lye as claimed in claim 1 is characterized in that, electrical conductivity and liquid level that said control alkali lye cleans section comprise:
When the electrical conductivity of alkali lye cleaning section is lower than the lower limit of its electrical conductivity; Liquid level also is lower than the following of its liquid level and at first controls liquid level in limited time, will be that benchmark adds this alkali lye cleaning section at the alkali lye of preceding adjacent cleaning section with the band steel direction of motion; Perhaps add desalted water; Control electrical conductivity then, the electrical conductivity of cleaning section when alkali lye is lower than under its electrical conductivity in limited time, cleans section toward this alkali lye and adds an alkali lye.
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| CN201210211568.9A CN102716921B (en) | 2012-06-20 | 2012-06-20 | Use method of cleaning section alkali liquor on continuous annealing production line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077112A (en) * | 2016-06-22 | 2016-11-09 | 首钢京唐钢铁联合有限责任公司 | A kind of reduce defat unit cleaning demineralized water and the method and apparatus of steam consumption |
| CN106757099A (en) * | 2015-11-19 | 2017-05-31 | 新日铁住金工程技术株式会社 | The cleaning device and its control method of steel band processing equipment |
| CN106757295A (en) * | 2015-11-19 | 2017-05-31 | 新日铁住金工程技术株式会社 | The control method of electrolytic clean unit and electrolytic clean unit |
| CN108405641A (en) * | 2018-02-27 | 2018-08-17 | 首钢京唐钢铁联合有限责任公司 | A method of it is controlled for lye in cold-strip steel cleaning section |
| CN113862685A (en) * | 2021-08-23 | 2021-12-31 | 山东钢铁集团日照有限公司 | Control method for automatically adjusting cleaning effect of continuous hot-dip galvanizing production line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106757099A (en) * | 2015-11-19 | 2017-05-31 | 新日铁住金工程技术株式会社 | The cleaning device and its control method of steel band processing equipment |
| CN106757295A (en) * | 2015-11-19 | 2017-05-31 | 新日铁住金工程技术株式会社 | The control method of electrolytic clean unit and electrolytic clean unit |
| CN106757099B (en) * | 2015-11-19 | 2020-03-27 | 新日铁住金工程技术株式会社 | Cleaning device for steel strip processing equipment and control method thereof |
| CN106757295B (en) * | 2015-11-19 | 2020-05-19 | 日铁工程技术株式会社 | Electrolytic cleaning device and control method for electrolytic cleaning device |
| CN106077112A (en) * | 2016-06-22 | 2016-11-09 | 首钢京唐钢铁联合有限责任公司 | A kind of reduce defat unit cleaning demineralized water and the method and apparatus of steam consumption |
| CN106077112B (en) * | 2016-06-22 | 2019-04-09 | 首钢京唐钢铁联合有限责任公司 | A method of reducing degreasing unit cleaning demineralized water and steam consumption |
| CN108405641A (en) * | 2018-02-27 | 2018-08-17 | 首钢京唐钢铁联合有限责任公司 | A method of it is controlled for lye in cold-strip steel cleaning section |
| CN113862685A (en) * | 2021-08-23 | 2021-12-31 | 山东钢铁集团日照有限公司 | Control method for automatically adjusting cleaning effect of continuous hot-dip galvanizing production line |
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| CN102716921B (en) | 2015-02-25 |
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Application publication date: 20121010 Assignee: BEIJING SHOUGANG COLD ROLLING THIN PLATE CO., LTD. Assignor: Capital Iron & Steel General Company Contract record no.: 2015990001019 Denomination of invention: Use method of cleaning section alkali liquor on continuous annealing production line Granted publication date: 20150225 License type: Common License Record date: 20151209 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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