CN101337724A - Magnetic powder recovering and supplying method in water processing process - Google Patents
Magnetic powder recovering and supplying method in water processing process Download PDFInfo
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- CN101337724A CN101337724A CNA2008100458688A CN200810045868A CN101337724A CN 101337724 A CN101337724 A CN 101337724A CN A2008100458688 A CNA2008100458688 A CN A2008100458688A CN 200810045868 A CN200810045868 A CN 200810045868A CN 101337724 A CN101337724 A CN 101337724A
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Abstract
The invention relates to a method for recycling and adding magnetic powder used during the process of water treatment. The method comprises the following steps: adding water to magnetic floccules separated from the magnetic separation process of water treatment and performing high-speed churning till the floccules are scattered; selecting magnetic substances and nonmagnetic substances; adding water to the selected magnetic powder and slowly churning the magnetic powder into magnetic powder liquid; demagnetizing, metering, and adding the magnetic powder liquid to a flocculation basin for backwater treatment. The method not only ensures that the purity and the recycling rate of the magnetic powder separated and recycled subsequently reach more than 99%, but also ensures the dispersibility of the magnetic powder and the accuracy of measurement of a metering pump during adding. The method has the advantages of simple process, perfect function, reliable operation, etc., can replace the prior method that adopts a regular magnetic separator for mineral dressing and a regular pump for recycling and adding magnetic powder during the treatment of wastewater containing nonmagnetic suspended substances, and solves unsettled technical difficulties in the technical field of water treatment.
Description
Technical field
The invention belongs to technical field of waste water processing, particularly relate to a kind of magnetic that is used for water treatment procedure and reclaim and addition method.
Background technology
In wastewater treatments such as oil, chemical industry, pharmacy,, generally be to adopt modes such as precipitation, filtration in order to remove non magnetic suspended substance.But in some occasion,, also can adopt and add flocculation agent and magnetic, use the isolating mode of flocculation-magnetic that non-magnetic substance is removed from waste water then for saving equipment takes up an area of, accelerates velocity of separation.When handling the waste water of big flow, in order to save cost, the magnetic that adds all needs to consider it to be reclaimed and utilize usually as enterprise.
At present, in the recovery of magnetic and add link, prior art all is directly to adopt ore dressing to carry out the recovery of magnetic with magnetic separator, and directly adds with pump.There are two subject matters in this mode: 1. because in water treatment procedure; remove suspended substance in order to separate by magnetic effectively, up hill and dale; add the magnetic except that selecting for use; usually also to add flocculation agent; so that non magnetic suspended substance can form greater particle size and closely knit magnetic floc sedimentation with the magnetic that adds, be convenient to separate better.But when reclaiming this magnetic floc sedimentation, if directly adopt mining magnetic separator that it is sorted, will produce two kinds of results because of the height of magnetic separator magneticstrength: though the magnetic purity height that i.e. downfield magnetic separation recovery obtains, loss is big; Though it is big that the magnetic amount that obtains is reclaimed in the upfield magnetic separation, will be mingled with a large amount of non magnetic suspended substances in the magnetic.Therefore, can not guarantee the high-recovery and the high purity of magnetic simultaneously.2. owing to all have remanent magnetism through the magnetic after sorting, thereby can produce " magnetic flocculation " phenomenon, it is self-agglomeration, at this moment directly drop in the waste water once more it, can be because the reduction of the dispersing property of magnetic, when causing flocculating with non magnetic suspended substance, the flocculating effect variation is separated the effect of removing suspended substance thereby reduce magnetic.These two problems are the unsolved technical barriers of water-treatment technology field always.
Summary of the invention
The objective of the invention is at above-mentioned magnetic add and removal process in the deficiency that exists, provide a kind of magnetic that is used for water treatment procedure to reclaim and addition method.
The magnetic that is used for water treatment procedure provided by the invention reclaims and addition method, this method is that the magnetic floc sedimentation that will separate from water treatment magnetic separation circuit earlier adds water and carries out high-speed stirring to floc sedimentation and disperse, then it is carried out magnetic and non-magnetic substance sorts, the magnetic that sorts out is added water stir at a slow speed that to be made into mass percent concentration be that metering adds in the flocculation basin that backwater handles behind 5～10% the magnetic powder fluid.
For the remanent magnetism that the magnetic of eliminating after sorting has, the present invention also to drop into once more magnetic powder fluid in the waste water demagnetize handle after again metering add in the waste water that backwater handles.The present invention is 1000Gs～3000Gs to the magnetic powder fluid alternating magnetic field intensity of handling of demagnetizing.
Aforesaid method is 2800～6000r/min to the high-speed stirring rotating speed that the magnetic floc sedimentation adds water-dispersion.
Magnetic sorts with non-magnetic substance and adopts magnetic to separate magnetic drum in the aforesaid method, and its magneticstrength is 2000～4000Gs.
The rotating speed that in the aforesaid method magnetic powder fluid is stirred at a slow speed is 100～1500r/min.
The inventive method can be implemented by the system that equipment shown in Figure 1 is formed, the magnetic floc sedimentation that is about to separate in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond), add water and with high speed agitator after being stirred to flco dispersion under rotating speed 2800～6000r/min, by lift pump the flco dispersion liquid being pumped into magnetic separates in the magnetic drum, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 2000～4000Gs effluxes; the magnetic after sorting enters liquid-storing box (pond); adding water, to be made into mass percent concentration be 5～10% magnetic powder fluid; and be to stir at a slow speed under 100～1500r/min by the whipping appts that is provided with in the liquid-storing box (pond) at rotating speed; to keep magnetic liquid even; by the volume pump that is connected with liquid-storing box magnetic liquid is added in waste water then; the demagnetizer that to be provided with an alternating magnetic field intensity on the front-end pipelines of volume pump be 1000Gs～3000Gs, to return the remanent magnetism that passes through the magnetic that sorting obtains.Equipment shown in Figure 1 is commercially available equipment.
Compared with the prior art the present invention has the following advantages:
1, since the present invention before the magnetic floc sedimentation is separated, adopted the high-speed stirring mode that the magnetic floc sedimentation has been implemented to force to disperse earlier, making the non-magnetic impurity that is coated on outside the magnetic break away from magnetic is scattered in the water, thereby both guaranteed the purity of the magnetic that later separation reclaims to guarantee also that its rate of recovery reaches more than 99% simultaneously.
2, owing to the present invention is provided with agitator in liquid-storing box (pond) the magnetic liquid that disposes before adding is stirred at a slow speed, make the magnetic powder fluid bulk concentration even, thereby accurate measurement when having guaranteed that volume pump adds, avoided because of dosage is inaccurate, and caused the fluctuation of main line technology flocculation and the difficulty of control.
3, since the present invention also adding with volume pump before configuration reclaims magnetic liquid, adopted alternating magnetic field to wherein contained magnetic demagnetization, thereby solved " magnetic flocculation " phenomenon that prior art produces, make the dispersiveness and the former iron powder of magnetic as broad as long, the flocculating effect that should obtain after adding can be fully protected.
4, magnetic provided by the invention reclaims and addition method, it is simple to have flow process, perfect in shape and function, advantage such as reliable, can in the processing that contains non magnetic suspended wastewater, substitute the mode that the common ore dressing magnetic separator of existing employing, conventional pump reclaimed and added magnetic, solve the unsolved technical barrier of water-treatment technology field.
Description of drawings
Accompanying drawing is for implementing the device systems synoptic diagram of the inventive method.
Embodiment
Provide embodiment and the present invention is further described below in conjunction with accompanying drawing.But given embodiment can not be interpreted as limiting the scope of the invention, thereby nonessential improvement and adjustment that the professional and technical personnel has done according to the content and the design philosophy of the invention described above also should belong to protection scope of the present invention.
In addition, what deserves to be explained is that the magnetic powder fluid that following examples dispose is mass percent concentration.
Embodiment 1
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 3000r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 3800Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box (pond) 4; adding water, to be made into mass percent concentration be 5% magnetic powder fluid; and be to stir at a slow speed under the 100r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 1000Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Embodiment 2
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 6000r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 2000Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box (pond) 4; adding water, to be made into mass percent concentration be 8% magnetic powder fluid; and be to stir at a slow speed under the 150r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 2000Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Embodiment 3
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 5000r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 2500Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box (pond) 4; adding water, to be made into mass percent concentration be 6% magnetic powder fluid; and be to stir at a slow speed under the 500r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 2200Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Embodiment 4
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 4000r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 3500Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box; (pond) 4; adding water, to be made into mass percent concentration be 10% magnetic powder fluid; and be to stir at a slow speed under the 1500r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 3000Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Embodiment 5
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 2800r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 3000Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box (pond) 4; adding water, to be made into mass percent concentration be 9% magnetic powder fluid; and be to stir at a slow speed under the 1200r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 2600Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Embodiment 6
The magnetic floc sedimentation of separating in the wastewater treatment main flow magnetic separating apparatus is sent into agitator tank (pond) 1, add water and with high speed agitator after being stirred to flco dispersion under the rotating speed 3500r/min, by lift pump 2 the flco dispersion liquid being pumped into magnetic separates in the magnetic drum 3, the magneticstrength that provides via rare earth Nd FeB magnet steel is that the non-magnetic impurity behind the magnetic field separation of 4000Gs effluxes by row's mouth that magnetic separates magnetic drum 3; magnetic after sorting enters liquid-storing box (pond) 4; adding water, to be made into mass percent concentration be 7% magnetic powder fluid; and be to stir at a slow speed under the 800r/min by the whipping appts that is provided with in the liquid-storing box (pond) 4 at rotating speed; to keep magnetic liquid even; after returning the remanent magnetism of magnetic via the demagnetizer 5 that in the alternating magnetic field intensity that is provided with on the front-end pipelines of volume pump 6 is 1500Gs then, magnetic liquid is added in waste water by the volume pump 6 that is connected with liquid-storing box (pond) 4.
Claims (10)
1, a kind of magnetic that is used for water treatment procedure reclaims and addition method, this method is that the magnetic floc sedimentation that will separate from water treatment magnetic separation circuit earlier adds water and carries out high-speed stirring to floc sedimentation and disperse, then it is carried out magnetic and non-magnetic substance sorts, the magnetic that sorts out is added water stir at a slow speed and be made into metering behind the magnetic powder fluid and add in the flocculation basin that backwater handles.
2, the magnetic that is used for water treatment procedure according to claim 1 reclaims and addition method, this method be earlier to magnetic powder fluid demagnetize handle after again metering add in the waste water that backwater handles.
3, the magnetic that is used for water treatment procedure according to claim 2 reclaims and addition method, and this method is 1000Gs～3000Gs to the magnetic powder fluid alternating magnetic field intensity of handling of demagnetizing.
4, reclaim and addition method according to claim 1 or the 2 or 3 described magnetics that are used for water treatment procedure, this method is 2800～6000r/min to the high-speed stirring rotating speed that the magnetic floc sedimentation adds water-dispersion.
5, reclaim and addition method according to claim 1 or the 2 or 3 described magnetics that are used for water treatment procedure, magnetic sorts with non-magnetic substance and adopts magnetic to separate magnetic drum in this method, and its magneticstrength is 2000～4000Gs.
6, the magnetic that is used for water treatment procedure according to claim 4 reclaims and addition method, and magnetic sorts with non-magnetic substance and adopts magnetic to separate magnetic drum in this method, and its magneticstrength is 2000～4000Gs.
7, reclaim and addition method according to claim 1 or the 2 or 3 described magnetics that are used for water treatment procedure, the rotating speed that in this method magnetic powder fluid is stirred at a slow speed is 100～1500r/min.
8, the magnetic that is used for water treatment procedure according to claim 4 reclaims and addition method, and the rotating speed that in this method magnetic powder fluid is stirred at a slow speed is 100～1500r/min.
9, the magnetic that is used for water treatment procedure according to claim 5 reclaims and addition method, and the rotating speed that in this method magnetic powder fluid is stirred at a slow speed is 100～1500r/min.
10, the magnetic that is used for water treatment procedure according to claim 6 reclaims and addition method, and the rotating speed that in this method magnetic powder fluid is stirred at a slow speed is 100～1500r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100458688A CN101337724A (en) | 2008-08-22 | 2008-08-22 | Magnetic powder recovering and supplying method in water processing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100458688A CN101337724A (en) | 2008-08-22 | 2008-08-22 | Magnetic powder recovering and supplying method in water processing process |
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| CN101337724A true CN101337724A (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100458688A Pending CN101337724A (en) | 2008-08-22 | 2008-08-22 | Magnetic powder recovering and supplying method in water processing process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515325A (en) * | 2011-12-16 | 2012-06-27 | 四川环能德美科技股份有限公司 | Treatment process for mine water of coal deep well |
| CN102583871A (en) * | 2012-03-28 | 2012-07-18 | 苏州科技学院 | Method for removing copper ions from circuit board waste water |
| CN102603042A (en) * | 2012-03-28 | 2012-07-25 | 四川环能德美科技股份有限公司 | Magnetic separating magnetic drum |
| CN102616898A (en) * | 2012-03-28 | 2012-08-01 | 四川环能德美科技股份有限公司 | Magnetic drum for magnetic separation |
| CN104787862A (en) * | 2015-04-27 | 2015-07-22 | 中国环境科学研究院 | Treatment method for eutrophic water and device |
| CN105948192A (en) * | 2016-05-16 | 2016-09-21 | 武汉理工大学 | Magnetic filtering process and device for removing alkyl pollutants in waste water |
| CN108249531A (en) * | 2018-02-12 | 2018-07-06 | 中南大学 | A kind of magnetic kind regeneration method |
| CN109319901A (en) * | 2018-11-28 | 2019-02-12 | 中冶京诚工程技术有限公司 | Water body purification device |
| CN112811538A (en) * | 2021-01-06 | 2021-05-18 | 北京国蓝环保科技有限公司 | Method for adding and recovering magnetic powder in sewage treatment |
| CN115246672A (en) * | 2022-07-15 | 2022-10-28 | 中建环能科技股份有限公司 | Magnetic medium particle size determination method and coagulation method for magnetic coagulation water treatment technology |
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2008
- 2008-08-22 CN CNA2008100458688A patent/CN101337724A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102515325A (en) * | 2011-12-16 | 2012-06-27 | 四川环能德美科技股份有限公司 | Treatment process for mine water of coal deep well |
| CN102583871A (en) * | 2012-03-28 | 2012-07-18 | 苏州科技学院 | Method for removing copper ions from circuit board waste water |
| CN102603042A (en) * | 2012-03-28 | 2012-07-25 | 四川环能德美科技股份有限公司 | Magnetic separating magnetic drum |
| CN102616898A (en) * | 2012-03-28 | 2012-08-01 | 四川环能德美科技股份有限公司 | Magnetic drum for magnetic separation |
| CN104787862A (en) * | 2015-04-27 | 2015-07-22 | 中国环境科学研究院 | Treatment method for eutrophic water and device |
| CN105948192B (en) * | 2016-05-16 | 2019-01-29 | 武汉理工大学 | The Magnetic filter technique and its device of hydrocarbon based contaminants in a kind of removal waste water |
| CN105948192A (en) * | 2016-05-16 | 2016-09-21 | 武汉理工大学 | Magnetic filtering process and device for removing alkyl pollutants in waste water |
| CN108249531A (en) * | 2018-02-12 | 2018-07-06 | 中南大学 | A kind of magnetic kind regeneration method |
| CN109319901A (en) * | 2018-11-28 | 2019-02-12 | 中冶京诚工程技术有限公司 | Water body purification device |
| CN109319901B (en) * | 2018-11-28 | 2024-04-19 | 中冶京诚工程技术有限公司 | Water body purifying device |
| CN112811538A (en) * | 2021-01-06 | 2021-05-18 | 北京国蓝环保科技有限公司 | Method for adding and recovering magnetic powder in sewage treatment |
| CN115246672A (en) * | 2022-07-15 | 2022-10-28 | 中建环能科技股份有限公司 | Magnetic medium particle size determination method and coagulation method for magnetic coagulation water treatment technology |
| CN115246672B (en) * | 2022-07-15 | 2024-01-19 | 中建环能科技股份有限公司 | Magnetic medium particle size determination method and coagulation method of magnetic coagulation water treatment technology |
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Open date: 20090107 |