CN108059292A - Lithium ion battery produces the processing method of wastewater zero discharge - Google Patents
Lithium ion battery produces the processing method of wastewater zero discharge Download PDFInfo
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- CN108059292A CN108059292A CN201711218948.4A CN201711218948A CN108059292A CN 108059292 A CN108059292 A CN 108059292A CN 201711218948 A CN201711218948 A CN 201711218948A CN 108059292 A CN108059292 A CN 108059292A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The processing method of lithium ion battery production wastewater zero discharge of the present invention belongs to chemical wastewater treatment field, more particularly to a kind of processing method for lithium ion battery production waste water.Its purpose is to provide a kind of COD that can be effectively removed in waste water, salinity, the processing method of the lithium ion battery production waste water of zero-emission.The processing method of lithium ion battery production wastewater zero discharge of the present invention comprises the following steps：Precipitation；Filtering；Rectifying is recycled；Membrane filtration.The absorbing liquid that distillate in the processing method of the lithium ion battery production wastewater zero discharge of the present invention can be used in supplement waste gas absorption tower, this is because waste gas absorption water is exactly to absorb NMP in exhaust gas, absorption carries out recycling NMP again to a certain extent, therefore it is treated by the present method after waste water containing NMP need not arrange outside, can comprehensively utilize again.
Description
Technical field
The invention belongs to chemical wastewater treatment field, more particularly to a kind of processing for lithium ion battery production waste water
Method.
Background technology
The COD of lithium ion battery production waste water contains NMP, electrical conductivity 1000us/cm often in more than 20000mg/L.It is logical
Chang Qiye adds garden sewage using acidifying, Fenton oxidation, PH adjustment, flocculation sediment, plate and frame filter press press filtration processing, water outlet
The drawbacks of factory focuses on, this method mainly has：(1) need to consume a large amount of hydrogen peroxide (1~5%)；(2) Fenton oxidation reaction production
Raw a large amount of iron cements；(3) need to consume a large amount of sulfuric acid；(4) need to consume a large amount of lye.Therefore, exploitation one kind effectively removes waste water
In COD, salinity, the processing method of zero-emission is particularly important.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of COD that can be effectively removed in waste water, salinity, the lithiums of zero-emission
Ion battery produces the processing method of waste water.
The present invention relates to a kind of processing methods of lithium ion battery production wastewater zero discharge, and the described method includes following steps
Suddenly：
(1) precipitate：Suspended matter in waste water is removed by precipitating；
(2) filter：To water outlet obtained by step (1) by further filtering suspended matter in removal waste water；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
Preferably, water outlet obtained by the step (4) is used to clean lithium ion battery production equipment, the side of specific cleaning equipment
Method is：First pass is cleaned in the water outlet obtained by step (4), is then cleaned second time with deionized water.(change cleaning equipment side
Twice) formula is all cleaned in the past with deionized water
Preferably, the precipitation in the step (1) is using advection sedimentation, sloping plate deposition, tube settling, perpendicular stream precipitation or spoke
Stream precipitation.
Preferably, the filtering in the step (2) is using the filtering of sand filtration filter, activated carbon filtering, accurate filter mistake
Filter or fiber ball filter filtering.
Preferably, the rectifying described in the step (3), rectifying use gap rectifying or continuous rectification；In distillation process：It returns
Stream is than 2.0-4.0, effective plate number 7-10 blocks.
Preferably, the distillate in the step (4) contains NMP, for the waste water containing NMP to use do not generate it is bad
The place of influence or waste water containing NMP are to using beneficial place.
Preferably, the distillate in the step (3) is used to supplement the absorbing liquid in waste gas absorption tower.It is described to contain NMP
Waste water do not generate dysgenic place or waste water containing NMP to beneficial place is used to include exhaust gas suction to using
Receive tower (waste gas absorption water is exactly to absorb NMP in exhaust gas, and absorption carries out recycling NMP again to a certain extent).Therefore through this method at
Waste water containing NMP after reason need not be arranged outside, can comprehensively utilize again.
Preferably, membrane filtration is using reverse osmosis in the step (4), in membrane filtration：Membrane flux 15-20L/m2.h, pressure
0.8-1.2MPa。
The processing method difference from prior art of lithium ion battery production wastewater zero discharge of the present invention is：
The processing method of lithium ion battery production wastewater zero discharge of the present invention combines precipitation, filtering, rectifying recycling, membrane filtration
Etc. techniques, remove the COD and salinity that contain in waste water successively, final outflow water COD contents are not higher than 20mg/L, electrical conductivity<20us/
Cm, the removal rate of COD is more than 99% in processing procedure, and the removal rate of salinity is more than 98%.The present invention is removed by precipitating
Waste water most suspended substances refilter oil removal after precipitation, into rectifying, pass through the most of water of rectifying recycling.Lead to afterwards
Membrane filtration removal part COD and salinity are crossed, good condition is provided for follow-up reuse.
Available for the absorbing liquid in supplement waste gas absorption tower, (waste gas absorption water is exactly to absorb exhaust gas to distillate in the present invention
Middle NMP, absorption carry out recycling NMP again to a certain extent), therefore it is treated by the present method after waste water containing NMP need not arrange outside, can
To comprehensively utilize again.
Specific embodiment
The processing method of wastewater zero discharge is produced to the lithium ion battery of the present invention by following embodiment and checking test
It is further described.
Embodiment 1
The processing of the lithium ion battery production wastewater zero discharge of the present embodiment carries out according to the following steps：
(1) precipitate：Suspended matter in pending waste water is removed by spoke stream precipitation, in the present embodiment pending waste water for lithium from
Sub- wastewater from battery production；
(2) filter：Suspended matter in removal waste water is filtered by sand filtration filter to water outlet obtained by step (1)；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
The rectifying used in the present embodiment uses gap rectifying, reflux ratio 3.0,7 pieces of effective plate number；Membrane filtration is using anti-
It permeates, in membrane filtration：Membrane flux 19L/m2.h, pressure 0.8MPa.
After above-mentioned processing, first pass is cleaned using water outlet obtained by step (4), then cleans second with deionized water
Time.(cleaning equipment mode is changed, is all cleaned twice) with deionized water in the past
Embodiment 2
The processing of the lithium ion battery production wastewater zero discharge of the present embodiment carries out according to the following steps：
(1) precipitate：Suspended matter in pending waste water is removed by perpendicular stream precipitation, in the present embodiment pending waste water for lithium from
Sub- wastewater from battery production；
(2) filter：Suspended matter in removal waste water is filtered by activated carbon to water outlet obtained by step (1)；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
The rectifying used in the present embodiment uses continuous rectification, reflux ratio 2.5,10 pieces of effective plate number；Membrane filtration uses
It is reverse osmosis, in membrane filtration：Membrane flux 16L/m2.h, pressure 1.2MPa.
Distillate obtained by step (3) is used to supplement the absorbing liquid in waste gas absorption tower.Therefore it is treated by the present method after contain
NMP waste water need not be arranged outside, can comprehensively utilize again.
After above-mentioned processing, first pass is cleaned using water outlet obtained by step (4), then cleans second with deionized water
Time.(cleaning equipment mode is changed, is all cleaned twice) with deionized water in the past
Embodiment 3
The processing of the lithium ion battery production wastewater zero discharge of the present embodiment carries out according to the following steps：
(1) precipitate：Suspended matter in pending waste water is removed by tube settling, in the present embodiment pending waste water for lithium from
Sub- wastewater from battery production；
(2) filter：Suspended matter in waste water is removed by fiber ball filter to water outlet obtained by step (1)；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
The rectifying used in the present embodiment uses continuous rectification, reflux ratio 3.0,8 pieces of effective plate number；Membrane filtration is using anti-
It permeates, in membrane filtration：Membrane flux 20L/m2.h, pressure 1.1MPa.
After above-mentioned processing, first pass is cleaned using water outlet obtained by step (4), then cleans second with deionized water
Time.(cleaning equipment mode is changed, is all cleaned twice) with deionized water in the past
Embodiment 4
The processing of the lithium ion battery production wastewater zero discharge of the present embodiment carries out according to the following steps：
(1) precipitate：Suspended matter in pending waste water is removed by sloping plate deposition, in the present embodiment pending waste water for lithium from
Sub- wastewater from battery production；
(2) filter：Suspended matter in removal waste water is filtered by accurate filter to water outlet obtained by step (1)；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
The rectifying used in the present embodiment uses gap rectifying, reflux ratio 4.0,10 pieces of effective plate number；Membrane filtration uses
It is reverse osmosis, in membrane filtration：Membrane flux 18L/m2.h, pressure 0.9MPa.
After above-mentioned processing, first pass is cleaned using water outlet obtained by step (4), then cleans second with deionized water
Time.(cleaning equipment mode is changed, is all cleaned twice) with deionized water in the past
Embodiment 5
The processing of the lithium ion battery production wastewater zero discharge of the present embodiment carries out according to the following steps：
(1) precipitate：Suspended matter in pending waste water is removed by advection sedimentation, in the present embodiment pending waste water for lithium from
Sub- wastewater from battery production；
(2) filter：Suspended matter in removal waste water is filtered by activated carbon to water outlet obtained by step (1)；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate, outer place of rectification residue committee
Reason；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, is i.e. completion pair
Lithium ion battery produces the processing method of wastewater zero discharge.
The rectifying used in the present embodiment uses continuous rectification, reflux ratio 2.0,9 pieces of effective plate number；Membrane filtration is using anti-
It permeates, in membrane filtration：Membrane flux 15L/m2.h, pressure 1.1MPa.
After above-mentioned processing, first pass is cleaned using water outlet obtained by step (4), then cleans second with deionized water
Time.(cleaning equipment mode is changed, is all cleaned twice) with deionized water in the past
Checking test
The COD contents and electrical conductivity of water outlet in each processing procedure in above example 1-5 are measured, gained knot
Fruit is as shown in table 1.
Raw water, the COD contents and electrical conductivity of processing water in 1 embodiment 1-5 of table
As seen from the above table, the present embodiment method has the COD in lithium ion battery production waste water and salinity higher
Removal rate, removal rate up to more than 98%, clean wastewater zero discharge.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of from the principle and substance of the present invention, various changes or modifications can be made to these embodiments, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (8)
1. a kind of processing method of lithium ion battery production wastewater zero discharge, it is characterised in that：It the described method comprises the following steps：
(1) precipitate：Suspended matter in waste water is removed by precipitating；
(2) filter：To water outlet obtained by step (1) by further filtering suspended matter in removal waste water；
(3) rectifying is recycled：Rectification process is carried out to water outlet obtained by step (2), recycles distillate；
(4) membrane filtration：Distillate obtained by step (3) is filtered, reduces salinity and organic matter in water outlet, that is, complete to lithium from
The processing method of sub- wastewater from battery production zero-emission.
2. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly for cleaning lithium ion battery production equipment, the method for specific cleaning equipment is for water outlet obtained by (4)：It is drawn with step (4)
Water cleans first pass, is then cleaned second time with deionized water.
3. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly the precipitation in (1) is using advection sedimentation, sloping plate deposition, tube settling, perpendicular stream precipitation or spoke stream precipitation.
4. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly the filtering in (2) is using the filtering of sand filtration filter, activated carbon filtering, accurate filter filtering or fiber ball filter filtering.
5. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly the rectifying described in (3), rectifying use gap rectifying or continuous rectification；In distillation process：Reflux ratio 2.0-4.0, actual plate
Number 7-10 blocks.
6. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly the distillate in (3) does not generate waste water dysgenic local or containing NMP for the waste water containing NMP to using
To using beneficial place.
7. the processing method of lithium ion battery production wastewater zero discharge according to claim 6, it is characterised in that：The step
Suddenly the distillate in (3) is used to supplement the absorbing liquid in waste gas absorption tower.
8. the processing method of lithium ion battery production wastewater zero discharge according to claim 1, it is characterised in that：The step
Suddenly membrane filtration is using reverse osmosis in (4), in membrane filtration：Membrane flux 15-20L/m2.h, pressure 0.8-1.2MPa.
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Cited By (2)
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| CN109264939A (en) * | 2018-12-06 | 2019-01-25 | 湖南大辰环保科技有限公司 | The processing method and system of Lithium Battery Industry production waste water |
| CN110282786A (en) * | 2019-06-14 | 2019-09-27 | 江苏卓博环保科技有限公司 | Recycle waste lithium cell positive electrode waste water reclaiming processing unit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109264939A (en) * | 2018-12-06 | 2019-01-25 | 湖南大辰环保科技有限公司 | The processing method and system of Lithium Battery Industry production waste water |
| CN110282786A (en) * | 2019-06-14 | 2019-09-27 | 江苏卓博环保科技有限公司 | Recycle waste lithium cell positive electrode waste water reclaiming processing unit and method |
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