CN104386872B - A kind of apparatus and method for separating of nano magnetic material - Google Patents
A kind of apparatus and method for separating of nano magnetic material Download PDFInfo
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- CN104386872B CN104386872B CN201410723567.1A CN201410723567A CN104386872B CN 104386872 B CN104386872 B CN 104386872B CN 201410723567 A CN201410723567 A CN 201410723567A CN 104386872 B CN104386872 B CN 104386872B
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Abstract
The invention provides a kind of new device for separating of nano magnetic material, comprise the initial gross separation unit (1), filtering separation unit (2), magnetic field separation unit (3), fine sand filtering unit (4) and the water unit (5) that connect successively from top to bottom; The water-in of described initial gross separation unit (1) is obliquely installed, and is provided with pulse air cleaning device (6) bottom it; The interior filling ferrous powder filtrate of described filtering separation unit (2); Magnetic board is provided with in described magnetic field separation unit (3); Fine quartz sand is filled in described fine sand filtering unit (4).The features such as this nano magnetic material tripping device has compact construction, easy to use, floor space is little, rejection effect is good, have good popularizing application prospect under the condition that current nano material is extensively concerned.
Description
Technical field
The invention belongs to field of water treatment equipment, particularly a kind of tripping device of nano-magnetic material for water treatment.
Background technology
The water environment pollution problem of China is serious, and also has influence on the water quality safety in tap water field.For removal and the control of water pollutant, usefulness and the character of material for water treatment are most important.Nanometer materials extensively receive publicity with its good treatment efficiency, however its in the application produced problem also progressively cause everybody concern.After nanometer materials enter water body, the particle diameter less due to it and some produced thus fundamental characteristics, cause it to use the conventional more difficult effective separation of water technology.And correlative study shows that nano material itself has obvious nanometer toxicity to organism, have a strong impact on its health.Therefore, the separation method for nano material is one of focus of recent water treatment field research.
On the basis of nano material, people have developed the such as nano level magnetic material for water treatment such as nano-scale magnetic photocatalyst, nano-scale magnetic chitosan, and in water treatment procedure, possess good treatment efficiency, but there is the problem of separation difficulty equally.Therefore in the urgent need to a kind of efficient, simple, be convenient to the novel nano magneticsubstance tripping device applied in Practical Project or method.
Summary of the invention
Goal of the invention: the object of the invention is to a kind ofly to provide efficient, simple, be convenient to the novel nano magneticsubstance tripping device applied in Practical Project.
Technical scheme: the invention provides a kind of new device for separating of nano magnetic material, comprises the initial gross separation unit, filtering separation unit, magnetic field separation unit, fine sand filtering unit and the water unit that connect successively from top to bottom; The water-in of described initial gross separation unit is obliquely installed, and is provided with pulse air cleaning device bottom it; Filling ferrous powder filtrate in described filtering separation unit; Magnetic board is provided with in described magnetic field separation unit; Fine quartz sand is filled in described fine sand filtering unit.
As improvement, the water-in of described initial gross separation unit is provided with more than the 2 groups plane reticular device for trapping be arranged in parallel, plane reticular device for trapping is provided with filter membrane or the filter cloth that aperture is 2-10 μm, and often group device for trapping is inclined to set, pitch angle is 100 ~ 130 °, crosses water flow velocity and controls at 20-600L/m
2min.
Improve as another kind, the air purge intensity of described pulse air cleaning device is 10-30L/m
2.s, the recurrence interval is 10s ~ 10min.
Improve as another kind, the particle diameter of the iron powder filtrate that described filtering separation unit is filled is 10-30 order, and in filtering separation unit, iron powder filtrate thickness of filter bed is 30-80cm, and filtering velocity is between 3-8m/h.
Improve as another kind, the quantity of the magnetic board in described magnetic field separation unit is more than 2 pieces, and long is 10-50cm; The electromagnetism direction of magnetic board is parallel with water (flow) direction, adjacent magnetic board interval 2-10cm.
Improve as another kind, the particle diameter of the fine quartz sand of filling in described fine sand filtering unit is 0.5-0.8mm, and in described fine sand filtering unit, fine quartz sand thickness of filter bed is 20-50cm.
Improve as another kind, described water unit is provided with water pipe and inlet pipe; Described initial gross separation unit is provided with back flushing water shoot.
Present invention also offers a kind of method for separating of nano-scale magnetic material, comprise the following steps:
1) be filter membrane on initial gross separation unit or filter cloth initial gross separation containing the water via hole diameter of nano magnetic material, by the intermission aeration of pulse air cleaning device, the particle be trapped on filter membrane or filter cloth peeled off in time in filtration procedure;
2) current through initial gross separation are separated by filtration unit, nano magnetic material in the further trap water of the iron powder in filtering separation unit;
3) through the current of filtering separation unit through electromagnetic field separating unit, nano magnetic material in further trap water;
4) through the current of electromagnetic field separating unit through fine sand filtering unit, nano magnetic material in further trap water, the water after purification is flowed out by water unit;
5) use the water pipe on water unit and inlet pipe, adopt the mode of combined water and air backwash to clean material that each unit retains.
Beneficial effect: nano magnetic material tripping device compact construction provided by the invention, floor space are little, easy to use, flexible operation, applied widely, the removal effect of nano magnetic material in water and overall effluent quality can be ensured preferably, there is good popularizing application prospect.
The present invention is according to the fundamental characteristics of nano magnetic material, and classification, nano material being separated step by step, finally guarantee efficiently retaining of nano material in water outlet, and achieves the recycling of nano material by the design of back-purge system and backflow flushing arrangement.Specifically, the characteristic that the present invention more easily assembles according to nano magnetic material, first adopts the filter membrane of larger aperture or filter cloth are retained by most of magneticsubstance and are directly back in system by pulse air cleaning device; Nano magnetic material residual after initial gross separation device retains can fully be removed at iron powder filtering unit further; Follow-up electromagnetic field separating unit and fine sand filtering unit is more can play the effect guaranteeing effluent quality; By above-mentioned removal continuously, step by step, the nano magnetic material in water can be controlled effectively.In addition, setting for the back-purge system of iron powder filtering layer utilizes the opening and closing of set magnetic valve to be again back in fluorine removal device to realize retaining nano material in filtering layer dexterously, and the water that back flushing back segment can be utilized again comparatively to clean, gas are to realize the flushing of filter membrane or filter cloth in initial gross separation unit.
Adopt closed type in the filtering separation unit of this device, negative pressure-pumping effect can be formed at filtering separation unit top to a certain extent, be conducive to the normal operation of initial gross separation unit; The iron powder arranged in filtering separation unit filters filtering layer, can meet the needs that magneticsubstance retains on the one hand, can be formed the iron ion possessing certain flocculation on the other hand, thus be conducive to the removal of all the other impurity in water by a small amount of stripping in use procedure.
Innovatively filter membrane is obliquely installed in the initial gross separation unit of this device, thus namely to avoid when being horizontally disposed with water (flow) direction and retain material landing direction and completely contradict, easily occur that filter membrane blocks, cross the defect that film pressure sharply increases, can fully will retain material and rinse back bulk solution by the intermission aeration device of filter membrane bottom again.
The magnetic field separation unit of this device can be determined whether to open according to actual needs, thus under the prerequisite ensureing effluent quality safety, reduces system cloud gray model energy consumption; And magnetic board is arranged to detachable, is conducive to subsequent operations and safeguards.
The fine sand filtering unit of this device on the one hand can a small amount of magneticsubstance of effectively catching, on the other hand can by all the other the impurity effectively catchings in water.
This device adopts combined water and air backwash can realize the synchronous back flushing of fine sand filtering unit, filtering separation unit and initial gross separation unit, greatly reduces energy consumption and water consumption; Backwash process fine sand is inflatable between magnetic board simultaneously, utilizes the friction between fine sand and magnetic board can assist to remove a small amount of material be attached on magnetic board, thus guarantees the usefulness of electromagnetic field.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for separating of the new device of nano magnetic material.
Fig. 2 is that (a) TEM of nano-magnetic chitin particle schemes with (b) SEM.
Fig. 3 is tap water and the particle size distribution after being separated.
Embodiment
Below in conjunction with accompanying drawing the present invention made for separating of the new device of nano magnetic material and further illustrating.
For separating of the new device of nano magnetic material, see Fig. 1, comprise the initial gross separation unit 1, filtering separation unit 2, magnetic field separation unit 3, fine sand filtering unit 4 and the water unit 5 that connect successively from top to bottom.The water-in of initial gross separation unit 1 is obliquely installed, and is provided with pulse air cleaning device 6 bottom it; The water-in of initial gross separation unit 1 is provided with more than the 2 groups plane reticular device for trapping be arranged in parallel, plane reticular device for trapping is provided with filter membrane or the filter cloth that aperture is 2-10 μm, and often group device for trapping is inclined to set, pitch angle is 100 ~ 130 °, crosses water flow velocity and controls at 20-600L/m
2min.The air purge intensity of pulse air cleaning device 6 is 10-30L/m
2.s, the recurrence interval is 10s ~ 10min.Particle diameter 10-30 order iron powder filtrate is filled in filtering separation unit 2; In filtering separation unit 2, iron powder filtrate thickness of filter bed is 30-80cm, and filtering velocity is between 3-8m/h.More than 2 pieces magnetic boards are provided with in magnetic field separation unit 3; Magnetic board is long is 10-50cm; The electromagnetism direction of magnetic board is parallel with water (flow) direction, adjacent magnetic board interval 2-10cm.Fill particle diameter 0.5-0.8mm fine quartz sand in fine sand filtering unit 4, in fine sand filtering unit 4, fine quartz sand thickness of filter bed is 20-50cm.Water unit 5 is provided with water pipe 7 and inlet pipe 8; Initial gross separation unit 1 is provided with back flushing water shoot 9.
Utilize nano-scale magnetic material in this device Separation of Water, comprise the following steps:
1) be filter membrane on initial gross separation unit (1) or filter cloth initial gross separation containing the water via hole diameter of nano magnetic material, by the intermission aeration of pulse air cleaning device, the particle be trapped on filter membrane or filter cloth peeled off in time in filtration procedure;
2) current through initial gross separation are separated by filtration unit, nano magnetic material in the further trap water of the iron powder in filtering separation unit;
3) through the current of filtering separation unit through electromagnetic field separating unit, nano magnetic material in further trap water;
4) through the current of electromagnetic field separating unit through fine sand filtering unit, nano magnetic material in further trap water, the water after purification is flowed out by water unit;
5) use the water pipe on water unit and inlet pipe, adopt the mode of combined water and air backwash to clean material that each unit retains.
For verifying the usefulness of this nano material tripping device, carried out water distribution proof test at use for laboratory tap water, nano magnetic material selects the homemade nano-magnetic chitin in laboratory, and particle diameter is about 10nm (its grown form is shown in Fig. 2).
Utilize grain count instrument, nano particle size instrument and turbidimeter to measure the water quality difference being separated rear and tap water respectively, the results are shown in Table 1 and Fig. 3.
Table 1 water quality detection result
As can be seen from Table 1, tripping device has good removal effect to magnetic Nano material, after being separated, granule number is reduced to 56/mL by 160 of tap water, and the measurement result that opacity is also reduced to 0.1NTU. and nano particle size instrument by 0.36 also shows, there is not obvious change in the size-grade distribution of water sample after tripping device is separated.Illustrate that this tripping device has good removal effect to nano-sized magnetic particles.
Claims (8)
1. for separating of a device for nano magnetic material, it is characterized in that: comprise the initial gross separation unit (1), filtering separation unit (2), magnetic field separation unit (3), fine sand filtering unit (4) and the water unit (5) that connect successively from top to bottom; The water-in of described initial gross separation unit (1) is obliquely installed, and is provided with pulse air cleaning device (6) bottom it; The interior filling ferrous powder filtrate of described filtering separation unit (2); Magnetic board is provided with in described magnetic field separation unit (3); Fine quartz sand is filled in described fine sand filtering unit (4).
2. a kind of device for separating of nano magnetic material according to claim 1, it is characterized in that: the water-in of described initial gross separation unit (1) is provided with more than the 2 groups plane reticular device for trapping be arranged in parallel, plane reticular device for trapping is provided with filter membrane or the filter cloth that aperture is 2-10 μm, and often group device for trapping is inclined to set, pitch angle is 100 ~ 130 °, crosses water flow velocity and controls at 20-600L/m
2min.
3. a kind of device for separating of nano magnetic material according to claim 1, is characterized in that: the air purge intensity of described pulse air cleaning device (6) is 10-30L/m
2.s, the recurrence interval is 10s ~ 10min.
4. a kind of device for separating of nano magnetic material according to claim 1, it is characterized in that: the particle diameter of the iron powder filtrate that described filtering separation unit (2) is filled is 10-30 order, in filtering separation unit (2), iron powder filtrate thickness of filter bed is 30-80cm, and filtering velocity is between 3-8m/h.
5. a kind of device for separating of nano magnetic material according to claim 1, is characterized in that: the quantity of the magnetic board in described magnetic field separation unit (3) is more than 2 pieces, and long is 10-50cm; The electromagnetism direction of magnetic board is parallel with water (flow) direction, adjacent magnetic board interval 2-10cm.
6. a kind of device for separating of nano magnetic material according to claim 1, it is characterized in that: the particle diameter of the fine quartz sand of filling in described fine sand filtering unit (4) is 0.5-0.8mm, in described fine sand filtering unit (4), fine quartz sand thickness of filter bed is 20-50cm.
7. a kind of device for separating of nano magnetic material according to claim 1, is characterized in that: described water unit (5) is provided with water pipe (7) and inlet pipe (8); Described initial gross separation unit (1) is provided with back flushing water shoot (9).
8. for separating of a method for nano-scale magnetic material, it is characterized in that: comprise the following steps:
1) be filter membrane on initial gross separation unit (1) or filter cloth initial gross separation containing the water via hole diameter of nano magnetic material, by the intermission aeration of pulse air cleaning device, the particle be trapped on filter membrane or filter cloth peeled off in time in filtration procedure;
2) current through initial gross separation are separated by filtration unit, nano magnetic material in the further trap water of the iron powder in filtering separation unit;
3) through the current of filtering separation unit through electromagnetic field separating unit, nano magnetic material in further trap water;
4) through the current of electromagnetic field separating unit through fine sand filtering unit, nano magnetic material in further trap water, the water after purification is flowed out by water unit;
5) use the water pipe on water unit and inlet pipe, adopt the mode of combined water and air backwash to clean material that each unit retains.
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| CN201410723567.1A CN104386872B (en) | 2014-12-02 | 2014-12-02 | A kind of apparatus and method for separating of nano magnetic material |
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| CN104386872B true CN104386872B (en) | 2016-02-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593593A (en) * | 2009-04-10 | 2009-12-02 | 江苏工业学院 | Handle the preparation method of the magnetic Nano material of organic wastewater |
| CN102875743A (en) * | 2012-09-24 | 2013-01-16 | 中山大学 | Magnetic nanoparticles for degrading algal toxin, method for preparing magnetic nanoparticles and application of magnetic nanoparticles |
| CN103846159A (en) * | 2012-11-30 | 2014-06-11 | 中国石油化工股份有限公司 | A solid-liquid separator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593593A (en) * | 2009-04-10 | 2009-12-02 | 江苏工业学院 | Handle the preparation method of the magnetic Nano material of organic wastewater |
| CN102875743A (en) * | 2012-09-24 | 2013-01-16 | 中山大学 | Magnetic nanoparticles for degrading algal toxin, method for preparing magnetic nanoparticles and application of magnetic nanoparticles |
| CN103846159A (en) * | 2012-11-30 | 2014-06-11 | 中国石油化工股份有限公司 | A solid-liquid separator |
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