CN109110967A - A kind of ore concentration of bauxite waste water reuse system and method based on membrane chemical reactor - Google Patents
A kind of ore concentration of bauxite waste water reuse system and method based on membrane chemical reactor Download PDFInfo
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- CN109110967A CN109110967A CN201811058776.3A CN201811058776A CN109110967A CN 109110967 A CN109110967 A CN 109110967A CN 201811058776 A CN201811058776 A CN 201811058776A CN 109110967 A CN109110967 A CN 109110967A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The embodiment of the invention provides a kind of ore concentration of bauxite waste water reuse system and method based on membrane chemical reactor, wherein system includes: air-floating apparatus, membrane chemical reactor and reverse osmosis-nanofiltration processing system；Wherein, membrane chemical reactor includes: coagulation reaction device and microporous filtration；Microporous filtration includes: to produce pool, filtering area, water distribution area, the area Chu Zha and constant pressure back purge system；Reverse osmosis-nanofiltration processing system includes: reverse osmosis unit and nanofiltration device.Ore concentration of bauxite waste water reuse system and method provided in an embodiment of the present invention based on membrane chemical reactor, on the one hand improve ore concentration of bauxite recirculated water and be allowed to sustainable use, on the other hand service bauxite flotation, can improve bauxite concentrate yield and concentrate alumina silica ratio.
Description
Technical field
The present invention relates to water-treatment technology fields, useless more particularly to a kind of ore concentration of bauxite based on membrane chemical reactor
Water reclaiming system and method.
Background technique
A hydraulic aluminium profiles bauxite of low alumina -silica ratio in China can generate during flotation desilication promotes alumina silica ratio
A large amount of beneficiation wastewaters.To improve water utilization rate, reduces and polluted caused by industrial wastewater outlet, need to carry out beneficiation wastewater
Processing, and it is back to use floatation process.
Practically, ore concentration of bauxite waste water keeps bauxite in waste water etc. outstanding generally by medicaments such as addition flocculants
Floating object sedimentation separation, lower layer's suspended matter filters pressing obtain concentrate, tailing, and supernatant liquor is back to floatation process recycling.
However, such treatment process, there are still following problems:
With the simple reuse of ore concentration of bauxite waste water, the medicament that floatation process uses builds up in systems, causes
The ingredient of ore dressing return water is sufficiently complex, can seriously affect ore concentration of bauxite index, cause system can not longtime running, become restriction
The bottleneck of bauxite industry development.
In detail, in ore concentration of bauxite recirculated water, not only remaining flocculant easily makes mineral formation floc sedimentation, it is difficult to it separates,
Cause the deterioration of flotation results, and the Ca in ore dressing recirculated water2+、Mg2+And Al3+Equal inorganic salts also can be with bauxite flotation medicine
Agent, which reacts, generates indissoluble precipitating, causes the non-selective agglomerate of floatation process, influences mineral processing index.
Therefore, advanced treating ore concentration of bauxite recirculated water need to be carried out using membrane process, meets the advantageous mineral processing index for the treatment of for reuse
Requirement.Crucially, the collecting agent of bauxite flotation technique addition, the beneficiation reagents such as polyacrylamide of sedimentation link addition,
Make the content of organics in ore dressing water higher, it is increasingly complex, to use membrane process desalting processing to increase difficulty.Meanwhile in
For the mine soil of low alumina -silica ratio, monohydrated bauxite therein is mostly kaolinite stone-type, and bauxite mineral resources soil property is mostly kaolin, aluminium
The sticky kaolin that native mine recirculated water contains again increases the processing difficulty of membrane process.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of ore concentration of bauxite waste water recycling system based on membrane chemical reactor
System and method, to improve the mineral processing index of bauxite.Specific technical solution is as follows:
In a first aspect, the embodiment of the invention provides a kind of ore concentration of bauxite waste water recycling system based on membrane chemical reactor
System, comprising: air-floating apparatus, membrane chemical reactor and reverse osmosis-nanofiltration processing system；
The air-floating apparatus includes: air-dissolving apparatus and air bearing chemicals dosing plant；
The membrane chemical reactor includes: coagulation reaction device and microporous filtration；The coagulation reaction device goes out
Water end (W.E.) is connect with the water inlet end of the microporous filtration；The water inlet end of the coagulation reaction device is equipped with coagulating dosing
Device；
The microporous filtration includes: to produce pool, filtering area, water distribution area, the area Chu Zha and constant pressure back purge system；Institute
It states and is provided with micro-filtration membrane module in filtering area；First elevator pump is installed on the inlet pipeline of the microporous filtration；
The reverse osmosis-nanofiltration processing system includes: reverse osmosis unit and nanofiltration device；The water inlet of the reverse osmosis unit
End is connect with the water outlet of the membrane chemical reactor；The concentrated water water outlet of the reverse osmosis unit and the nanofiltration device into
Water end (W.E.) connection.
Optionally, the top for producing pool and being set to the microporous filtration；The area Chu Zha is set to described micro-
The bottom of membrane filter.
Optionally, the microporous filtration is immersed filter；The aperture of the micro-filtration membrane module is 0.1~0.4 μ
m；The micro-filtration membrane module uses pipe pocket type, tubular type or hollow fiber microfiltration membrane；The material of the micro-filtration membrane module includes: poly-
Tetrafluoroethene, ethylene chlorotrifluoroethylene, fluorinated ethylene propylene copolymer, perfluoro propyl perfluoroalkyl vinyl ether polytetrafluoroethyl-ne
At least one of alkene copolymer, Kynoar.
Optionally, blender is additionally provided in the coagulation reaction device.
Optionally, the production water water outlet for producing water water outlet and the nanofiltration device of the reverse osmosis unit, is all connected with
There is technique water producing tank.
Optionally, the second elevator pump, first security personnel's filtering are connected on the pipeline of the reverse osmosis unit water inlet end in turn
Device and booster pump；It is connected with third elevator pump and the second cartridge filter on the pipeline of the nanofiltration device water inlet end in turn；
The concentrated water water outlet of the reverse osmosis unit is also equipped with concentrated water case, and the water outlet of the concentrated water case and the third elevator pump connect
It is logical.
Second aspect, the embodiment of the invention also provides a kind of reuse methods of ore concentration of bauxite waste water, are applied to first
The ore concentration of bauxite waste water reuse system based on membrane chemical reactor that aspect provides, comprising:
Step A, ore concentration of bauxite waste water is introduced into air-floating apparatus, through air bearing chemicals dosing plant, in the air-floating apparatus
Aluminium polychloride and polyacrylamide is added simultaneously, gas is passed through to the air-floating apparatus by air-dissolving apparatus, to bauxite
Mine waste water is handled；
Step B, water will be produced through the air-floating apparatus treated air bearing to be passed through in coagulation reaction device, pass through coagulating
Sodium hydroxide and lime is added to the coagulation reaction device in chemicals dosing plant, and is stirred by blender, the coagulating time 30
~60min；
Water outlet obtained by coagulating is passed through in microporous filtration by step C by the first elevator pump, after filtering, institute
Water must be produced and flow into MCR water producing tank, the discharge of obtained solid slag；
Step D, it will produce that water passes sequentially through the second elevator pump and booster pump is passed through reverse osmosis unit obtained by microporous filtration,
Gained fresh water introduces technique water producing tank；
Step E, the concentrated water for generating the reverse osmosis unit is passed through nanofiltration device, gained fresh water by third elevator pump
It is re-introduced into the technique water producing tank；Gained concentrated water is discharged into sewage disposal system；
Step F, the fresh water in the technique water producing tank is introduced into ore dressing recirculated water collecting pit, the ore dressing recirculated water is collected
Water body in pond is used for bauxite flotation.
A kind of ore concentration of bauxite waste water reuse system and method based on membrane chemical reactor provided in an embodiment of the present invention,
Ore concentration of bauxite waste water is handled by membrane chemical reactor, producing water water quality stablize, meet subsequent reverse osmosis process into
Water requirement, also, technique obtained by reverse osmosis unit and nanofiltration device produces water, can be introduced into ore concentration of bauxite recirculated water, services
Bauxite flotation.On the one hand improve ore concentration of bauxite recirculated water and be allowed to sustainable use, on the other hand service bauxite flotation, energy
Improve bauxite concentrate yield and concentrate alumina silica ratio.Certainly, it implements any of the products of the present invention or method must be not necessarily required to together
When reach all the above advantage.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is a kind of ore concentration of bauxite waste water reuse system based on membrane chemical reactor provided in an embodiment of the present invention
Structural schematic diagram；
Fig. 2 is a kind of structural schematic diagram of bauxite mineral water circulation recycle system in the embodiment of the present invention.
In figure, 1. air-floating apparatus, 101. air-dissolving apparatus, 102. air bearing chemicals dosing plants, 2. membrane chemical reactors, 3. coagulations are anti-
Answer device, 301. coagulating chemicals dosing plants, 302. blenders, 4. microporous filtrations, 401. first elevator pumps, 402.MCR
Water producing tank, 403. constant pressure back purge systems, 404. chemically-cleaning devices, 405. slag-drip openings, 406. micro-filtration membrane modules, 407. produce water
Area, 408. filtering areas, 409. areas Chu Zha, 410. water distribution areas, 5. reverse osmosis units, 501. second elevator pumps, 502. first security personnel
Filter, 503. booster pumps, 6. concentrated water casees, 7. nanofiltration devices, 701. third elevator pumps, 702. second cartridge filters, 8. works
Skill water producing tank, 9. Membrane cleaning devices, 10. reverse osmosis-nanofiltration processing systems, 11. flotation units, 12. concentrate subsiders, 13. tails
Mine level-one subsider, 14. tailing secondary settling tanks, 15. ore concentration of bauxite circular water treating systems, 16. ore dressing recirculated waters are collected
Pond, 17. tailing collection devices, 18. concentrate collection devices, 19. floatation additive adding apparatus, 20. subsider chemicals dosing plants.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of ore concentration of bauxite waste water recycling based on membrane chemical reactor
System, the system include:
Air-floating apparatus 1, membrane chemical reactor (MCR, Membrance Chemical Reactor) 2 and reverse osmosis-nanofiltration
Processing system 10.
Wherein, air-floating apparatus 1 includes: air-dissolving apparatus 101 and air bearing chemicals dosing plant 102.Air-dissolving apparatus 101 is used for air bearing
Gas is passed through in device 1；Air bearing chemicals dosing plant 102 is for adding such as aluminium polychloride, polypropylene milling amine into air-floating apparatus 1
Equal medicaments.It should be noted that the air-floating apparatus 1 in the embodiment of the present invention, can be existing air-floating apparatus, additive amount of medicament
It can also be adjusted according to practical bauxite waste water quality.
Wherein, membrane chemical reactor 2 includes: coagulation reaction device 3 and microporous filtration 4, and coagulation reaction device 3 goes out
Water end (W.E.) is connect with the water inlet end of microporous filtration 4, forms connecting pipeline.Also, the water inlet end of coagulation reaction device 3 is equipped with
Coagulating chemicals dosing plant 301.
As a kind of specific embodiment of the embodiment of the present invention, blender can also be set in coagulation reaction device 3
302, it can make the medicament being added in coagulation reaction device 3 sufficiently and water mixing, improve the reaction efficiency of medicament and water body.
Wherein, microporous filtration 4 can be energy-saving immersed filter, comprising: produce pool 407, filtering area 408,
The area Chu Zha 409, water distribution area 410 and constant pressure back purge system 403；Is also equipped on the inlet pipeline of microporous filtration 4
One elevator pump 401.
Wherein, the top that pool 407 is set to microporous filtration 4 is produced, the turbidity that gained produces water is less than 0.3NTU, hardness
Less than 10mg/L.
Wherein, be provided with micro-filtration membrane module 406 in filtering area 408, micro-filtration membrane module 406 using pipe pocket type, tubular type or in
Hollow fiber microfiltration membranes, aperture are 0.1~0.4 μm, generally use polytetrafluoroethylene (PTFE) (PTFE), ethylene chlorotrifluoroethylene
(ECTFE), fluorinated ethylene propylene copolymer (FEP), perfluoro propyl perfluoroalkyl vinyl ether teflon-copolymers (PFA), poly-
The perfluors such as vinylidene (PVDF) or high fluorinated polymer material.
Wherein, the area Chu Zha 409 is set to the bottom of microporous filtration 4, outstanding after the reaction of ore concentration of bauxite coagulating waste water
Floating object can be discharged by slag-drip opening 405, and discharge form is the solid-liquid form that solid content is greater than 10%.
Wherein, water distribution area 410 is located at the lower part of microporous filtration 4, is used for water distribution.
Wherein, the water inlet end of above-mentioned constant pressure back purge system 403 is connected to the water distribution area 410 of microporous filtration 4, water outlet
End is connected to coagulation reaction device 3, and the water body after can making backwash again flows into coagulation reaction device 3 and carries out coagulating,
Reaction efficiency is improved, the residence time of coagulation reaction device 3 is shortened.
Wherein, reverse osmosis-nanofiltration processing system 10 includes: reverse osmosis unit 5 and nanofiltration device 7；Reverse osmosis unit 5 into
Water end (W.E.) is connect with the water outlet of membrane chemical reactor 2；The concentrated water water outlet of reverse osmosis unit 5 and the water inlet end of nanofiltration device 7 connect
It connects.
As a kind of specific embodiment of the embodiment of the present invention, the production water water outlet of reverse osmosis unit 5 and nanofiltration dress
The production water water outlet for setting 7, is respectively connected with technique water producing tank 8.Technique water producing tank 8 carrys out the reverse osmosis of reverse osmosis unit 5 for storing
The nanofiltration for producing water and nanofiltration device 7 produces water, and above-mentioned technique, which produces water, can be used as the use of ore concentration of bauxite recirculated water.
As a kind of specific embodiment of the embodiment of the present invention, the water inlet end of reverse osmosis unit 5 and nanofiltration device 7,
It is connected with Membrane cleaning device 9, Membrane cleaning device 9 is provided with cleaning agent, can carry out to reverse osmosis unit 5 and nanofiltration device 7
Cleaning.
As a kind of specific embodiment of the embodiment of the present invention, it is sequentially connected on the pipeline of 5 water inlet end of reverse osmosis unit
There are the second elevator pump 501, the first cartridge filter 502 and booster pump 503.Wherein, elevator pump is used for raw water reverse osmosis unit 5
Conveying provides power when producing water；Cartridge filter is used to filter the subtle substance in water body, it is ensured that water filtration precision and protection
Film filtering element is not by the damage of large particulate matter；The effect of booster pump is to further increase to convey to raw water reverse osmosis unit 5
Hydraulic pressure when water body.
Similarly, third elevator pump 701 and second security personnel's filtering are connected on the pipeline of 7 water inlet end of nanofiltration device in turn
Device 702.
As a kind of specific embodiment of the embodiment of the present invention, the concentrated water water outlet of reverse osmosis unit 5 is also equipped with dense
Water tank 6, for storing the concentrated water of the generation of reverse osmosis unit 5.Wherein, the water outlet of concentrated water case 6 is connected to third elevator pump 701.
As a kind of specific embodiment of the embodiment of the present invention, as shown in Fig. 2, the embodiment of the present invention based on membranization
The ore concentration of bauxite waste water reuse system 15 of reactor can collectively constitute one with existing ore concentration of bauxite water circulation system
On the one hand bauxite mineral water circulation recycle system makes former bauxite recirculated water be able to deep purifying sustainable utilization, another party
Face improves the mineral processing index of bauxite.
Above-mentioned bauxite mineral water circulation recycle system, referring to fig. 2, comprising:
Flotation unit 11, concentrate subsider 12, tailing level-one subsider 13, tailing secondary settling tank 14, ore concentration of bauxite
Circular water treating system 15, ore dressing recirculated water collecting pit 16, tailing collection device 17, concentrate collection device 18, flotation dosing dress
19 are set, subsider chemicals dosing plant 20.
Wherein, flotation unit 11 is connected to ore dressing recirculated water collecting pit 16, in addition flotation unit 11 and concentrate subsider 12
Connection, is also connected to tailing level-one subsider 13；Tailing level-one subsider 13 is connected to tailing secondary settling tank 14.
Wherein, the water inlet of the ore concentration of bauxite waste water reuse system 15 based on membrane chemical reactor and tailing second level settle
Slot 14 is connected to, specifically, the water inlet for air-floating apparatus 1 is connected to tailing secondary settling tank 14；Based on membrane chemical reactor
The water outlet of ore concentration of bauxite waste water reuse system 15 be connected to ore dressing recirculated water collecting pit 16, specifically, being produced for technique
The water outlet of water tank 8 is connected to ore dressing recirculated water collecting pit 16；And ore dressing recirculated water collecting pit 16 also connects with flotation unit 11
It is logical.
As can be seen from FIG. 2, after bauxite mineral water is contaminated in ore concentration of bauxite water circulation system, then it is being based on membranization
It learns in the ore concentration of bauxite waste water reuse system 15 of reactor and is able to deep purifying, then be back to bauxite mineral water cyclic system
System, thus bauxite mineral water can in composed bauxite mineral water circulation recycle system sustainable circulation.
It should be noted that above-mentioned flotation unit 11, concentrate subsider 12, tailing level-one subsider 13, tailing second level are heavy
Slot 14, tailing collection device 17, concentrate collection device 18, floatation additive adding apparatus 19, subsider chemicals dosing plant 20, ore dressing circulation drop
Water collecting pit 16 is the usual means in existing ore concentration of bauxite water circulation system, their the specific structure present invention is implemented
Details are not described herein for example.
A kind of ore concentration of bauxite waste water reuse system based on membrane chemical reactor provided in an embodiment of the present invention, passes through film
Chemical reactor handles ore concentration of bauxite waste water, and producing water water quality is stablized, and meets the water inlet requirement of subsequent reverse osmosis process,
Also, the technique as obtained by after reverse osmosis unit and nanofiltration device advanced treating produces water, can be back to use again ore concentration of bauxite and follow
In ring water, on the one hand improves ore concentration of bauxite recirculated water and be allowed to sustainable use, on the other hand, service bauxite flotation, can mention
High-al clay mine concentrate yield and concentrate alumina silica ratio.
The embodiment of the invention provides a kind of reuse method of ore concentration of bauxite waste water, this method is applied to as shown in Figure 1
The ore concentration of bauxite waste water reuse system based on membrane chemical reactor, dry point be tailing secondary settling tank overflow water, technique
It produces water and is back to use ore dressing recirculated water collecting pit, serve floatation process, comprising:
Step A, ore concentration of bauxite waste water is introduced into air-floating apparatus 1 from tailing secondary settling tank 14, is filled by air bearing dosing
Set 102, in the different location of air-floating apparatus 1, while aluminium polychloride and polyacrylamide be added, by air-dissolving apparatus 101 to
Air-floating apparatus 1 is passed through gas, handles ore concentration of bauxite waste water.Stop of the ore concentration of bauxite waste water in air-floating apparatus 1
Time is 1~1.5h.
It should be noted that the additive amount of aluminium polychloride and polyacrylamide, it can be according in ore concentration of bauxite waste water
Suspended matter, colloid lf dose flexibly set, the specific additive amount embodiment of the present invention is it is not limited here.For example, will polymerization
Aluminium chloride is configured to 5~20% mass concentration, and polyacrylamide is configured to 0.5 ‰~1.5 ‰ mass concentration, with simultaneously not
Mode with position is added in air-floating apparatus 1.
Step B, water will be produced through treated the air bearing of air-floating apparatus 1 to be passed through in coagulation reaction device 3, by coagulating plus
Medicine device 301 is added sodium hydroxide and lime to coagulation reaction device 3, and is stirred by blender 302, makes medicament and water body
Mixing, 30~60min of coagulating time.Coagulating process can be complexed present in the tailing overflow water after air-flotation process
Part collecting medicament, meanwhile, it is reacted with heavy carbonate a large amount of in water, generates precipitation of calcium carbonate.
Water outlet obtained by coagulating is passed through in microporous filtration 4 by step C, and after filtering, gained produces water and flows into MCR
Water producing tank 402, the discharge of obtained solid slag；Wherein, the turbidity that gained produces water is less than 0.3NTU.
Step D, gained production water is passed sequentially through into the second elevator pump 501 and booster pump 503 is passed through reverse osmosis unit 5, carried out
Advanced treating, gained fresh water can be exhausted directly to ore dressing recirculated water collecting pit 16, can also first be passed through technique water producing tank 8, then lead to
Enter ore dressing recirculated water collecting pit 16.
Step E, the concentrated water for generating reverse osmosis unit 5 is passed through nanofiltration device 7, gained fresh water by third elevator pump 701
It can be exhausted directly to ore dressing recirculated water collecting pit 16, can also first be passed through technique water producing tank 8, then be passed through ore dressing recirculated water collecting pit
16；Gained concentrated water is discharged into sewage disposal system；
Step F, the fresh water in the technique water producing tank 8 is introduced into ore dressing recirculated water collecting pit 16, ore dressing recirculated water is collected
Water body in pond 16 is used for bauxite flotation.
In the embodiment of the present invention, nanofiltration is selected to handle reverse osmosis concentrated water, reduces outer displacement, improve entire processing system
Recycling water utilization rate.
As a kind of optional embodiment of the embodiment of the present invention, the specific step sequence of microporous filtration 4 are as follows:
Feed liquor: it will be discharged, be introduced into microporous filtration 4 obtained by coagulating；
Filtering: water body is filtered through the micro-filtration membrane module 406 in microporous filtration 4；
Recoil: the constant pressure back purge system 403 of microporous filtration 4 is opened, and produces the production water in pool 407 from micro-filtration membrane module
The outflow of 406 interior, recoils to micro-filtration membrane module 406；Constant pressure back purge system 403 is not required to additional energy；
Deslagging: the filter cake or reaction suspended matter that the area Chu Zha 409 deposits pass through row in the form of solid-liquid of the solid content greater than 10%
Cinder notch 405 is discharged.
The reuse method of a kind of ore concentration of bauxite waste water provided in an embodiment of the present invention, by membrane chemical reactor to alumina
Mine beneficiation wastewater is filtered, and producing water water quality is stablized, and meets the water inlet requirement of subsequent reverse osmosis process, also, by reverse osmosis
Technique obtained by device and nanofiltration device produces water, can be back to use again in ore concentration of bauxite recirculated water, on the one hand improves bauxite
On the other hand the mineral processing index of bauxite can be improved in the reuse ratio of mine waste water.
Certain ore concentration of bauxite enterprise, ore concentration of bauxite recirculated water index are as follows: pH:8.7~9.1, TDS:4~5 × 103mg/
L, COD: 330~740mg/L, bicarbonate alkalinity: 23~25mmol/L.
After the ore concentration of bauxite waste water reuse system processing based on membrane chemical reactor of the embodiment of the present invention, water quality is obtained
To being obviously improved, each segment process water quality indicator is as shown in table 1:
Each pollutant index and processing result in certain the ore concentration of bauxite enterprise beneficiation wastewater of table 1
It should be noted that in the ore concentration of bauxite waste water reuse system of the invention based on membrane chemical reactor,
Trandfer fluid between each section of device, such as liquid, such as waste water, fresh water, various dopes or solid such as precipitate and various
Medicament etc. can generally pass through Pipeline transport unless otherwise indicated；In addition, ought need additional transmission dynamic during transportation
When power, the power-equipments such as suitable pump, blower can be added on the pipeline of needs.Further, it can also need
When, increase suitable valve, on pipeline to control the flow direction etc. of fluid.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, such as term " includes " or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (7)
1. a kind of ore concentration of bauxite waste water reuse system based on membrane chemical reactor characterized by comprising
Air-floating apparatus (1), membrane chemical reactor (2), reverse osmosis-nanofiltration processing system (10)；
The air-floating apparatus (1) includes: air-dissolving apparatus (101) and air bearing chemicals dosing plant (102)；
The membrane chemical reactor (2) includes: coagulation reaction device (3) and microporous filtration (4)；The coagulation reaction device
(3) water outlet is connect with the water inlet end of the microporous filtration (4)；The water inlet end of the coagulation reaction device (3) is installed
There are coagulating chemicals dosing plant (301)；
The microporous filtration (4) include: produce pool (407), filtering area (408), water distribution area (410), the area Chu Zha (409) with
And constant pressure back purge system (403)；Micro-filtration membrane module (406) are provided in the filtering area (408)；The microporous filtration
(4) the first elevator pump (401) are installed on inlet pipeline；
The reverse osmosis-nanofiltration processing system (10) includes: reverse osmosis unit (5) and nanofiltration device (7)；The reverse osmosis unit
(5) water inlet end is connect with the water outlet of the membrane chemical reactor (2)；The concentrated water water outlet of the reverse osmosis unit (5) with
The water inlet end of the nanofiltration device (7) connects.
2. the ore concentration of bauxite waste water reuse system according to claim 1 based on membrane chemical reactor, which is characterized in that
The top for producing pool (407) and being set to the microporous filtration (4)；The area Chu Zha (409) is set to the micro-filtration
The bottom of membrane filter (4).
3. the ore concentration of bauxite waste water reuse system according to claim 1 based on membrane chemical reactor, which is characterized in that
The microporous filtration (4) is immersed filter；The aperture of the micro-filtration membrane module (406) is 0.1~0.4 μm；It is described
Micro-filtration membrane module (406) uses pipe pocket type, tubular type or hollow fiber microfiltration membrane；The material packet of the micro-filtration membrane module (406)
Include: polytetrafluoroethylene (PTFE), ethylene chlorotrifluoroethylene, fluorinated ethylene propylene copolymer, perfluoro propyl perfluoroalkyl vinyl ether are poly-
At least one of TFE copolymer, Kynoar.
4. the ore concentration of bauxite waste water reuse system according to claim 1 based on membrane chemical reactor, which is characterized in that
Blender (302) are additionally provided in the coagulation reaction device (3).
5. the ore concentration of bauxite waste water reuse system according to claim 1 based on membrane chemical reactor, which is characterized in that
The production water water outlet of the reverse osmosis unit (5) and the fresh water outlet end of the nanofiltration device (7) are respectively connected with technique and produce water
Case (8).
6. the ore concentration of bauxite waste water reuse system according to claim 1 based on membrane chemical reactor, which is characterized in that
The second elevator pump (501), the first cartridge filter (502) are connected in turn on the pipeline of reverse osmosis unit (5) water inlet end
And booster pump (503)；Third elevator pump (701) and second are connected in turn on the pipeline of nanofiltration device (7) water inlet end
Cartridge filter (702)；The concentrated water water outlet of the reverse osmosis unit (5) is also equipped with concentrated water case (6), the concentrated water case (6)
Water outlet be connected to the third elevator pump (701).
7. a kind of reuse method of ore concentration of bauxite waste water, which is characterized in that applied to described in claim 1-6 based on membranization
Learn the ore concentration of bauxite waste water reuse system of reactor, which comprises
Step A, ore concentration of bauxite waste water is introduced into air-floating apparatus (1), by air bearing chemicals dosing plant (102), is filled in the air bearing
Aluminium polychloride and polyacrylamide are set in (1) while being added, is passed through by air-dissolving apparatus (101) to the air-floating apparatus (1)
Gas handles ore concentration of bauxite waste water；
Step B, water will be produced through the air-floating apparatus (1) treated air bearing to be passed through in coagulation reaction device (3), it is anti-by coagulation
It answers chemicals dosing plant (301) that sodium hydroxide and lime is added to the coagulation reaction device (3), and is stirred by blender (302),
30~60min of coagulating time；
Water outlet obtained by coagulating is passed through in microporous filtration (4), through filtering by step C by the first elevator pump (401)
Afterwards, gained produces water and flows into MCR water producing tank (402), the discharge of obtained solid slag；
Step D, it will produce that water passes sequentially through the second elevator pump (501) and booster pump (503) is passed through instead obtained by microporous filtration (4)
Permeability apparatus (5), gained fresh water introduce technique water producing tank (8)；
Step E, the concentrated water for generating the reverse osmosis unit (5), is passed through nanofiltration device (7), institute by third elevator pump (701)
It obtains fresh water and is re-introduced into the technique water producing tank (8)；Gained concentrated water is discharged into sewage disposal system；
Step F, the fresh water in the technique water producing tank (8) is introduced into ore dressing recirculated water collecting pit, the ore dressing recirculated water is collected
Water body in pond is used for bauxite flotation.
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| CN111233244A (en) * | 2020-02-12 | 2020-06-05 | 苏州苏科环保科技有限公司 | Landfill leachate concentrated solution reduction treatment process |
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