CN117303657A - Advanced defluorination and dephosphorization treatment method for composite electrolyte production wastewater - Google Patents
Advanced defluorination and dephosphorization treatment method for composite electrolyte production wastewater Download PDFInfo
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- CN117303657A CN117303657A CN202311480655.9A CN202311480655A CN117303657A CN 117303657 A CN117303657 A CN 117303657A CN 202311480655 A CN202311480655 A CN 202311480655A CN 117303657 A CN117303657 A CN 117303657A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003792 electrolyte Substances 0.000 title claims abstract description 35
- 238000006115 defluorination reaction Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- -1 silicate compound Chemical class 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000013049 sediment Substances 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000004332 deodorization Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 229910000792 Monel Inorganic materials 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 claims description 2
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 2
- 150000002602 lanthanoids Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 abstract description 10
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052731 fluorine Inorganic materials 0.000 abstract description 8
- 239000011737 fluorine Substances 0.000 abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 8
- 239000011574 phosphorus Substances 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a deep defluorination and dephosphorization treatment method for waste water in composite electrolyte production, which comprises the following steps: s1, adding concentrated H into the wastewater 2 SO 4 Or HNO (HNO) 3 Simultaneously adding composite silicon which is at least one of silicate compound and silicon dioxide, and increasing the temperature; s2, adding a calcium hydroxide suspension, a dephosphorizing agent and a defluorinating agent into the S1 wastewater; s3, adding PAM flocculant, pumping to a plate frame for squeezing, discharging sediment, and allowing clear liquid to flow into a subsequent workerAnd (5) art. Breaks through the technical barrier of advanced defluorination and dephosphorization pretreatment of the wastewater produced by the lithium battery electrolyte, can achieve the pretreatment process purpose that the fluorine content is less than 10ppm and the phosphorus content is less than 2ppm, and enters a biochemical treatment system for advanced removal of COD, ammonia nitrogen and total nitrogen after pretreatment.
Description
Technical Field
The invention belongs to the field of environmental protection, relates to an industrial wastewater pretreatment process, and in particular relates to a pretreatment process of novel electrolyte production process production wastewater.
Background
Lithium batteries are an emerging industry, and as an important component of the new energy industry, the global lithium battery demand increases year by year with the continuous expansion of the application field. The lithium battery consists of a positive electrode, a negative electrode, an electrolyte and a diaphragm, wherein the electrolyte is a medium for lithium ion migration and charge transfer and is self-evident as blood of the lithium ion battery. The electrolyte is prepared from solute, solvent and additive according to a certain proportion; the solute is the core of the electrolyte, lithium hexafluorophosphate (LiPF 6 ) The excellent combination of properties makes it the most commercially available lithium salt for such electrolytes. However, lithium hexafluorophosphate has disadvantages of poor thermal stability in an electrolyte and easiness of hydrolysis, which may result in degradation of battery performance to some extent. In view of the above, new lithium salts (lithium bis-fluorosulfonyl imide, etc.) having excellent conductivity, stability, high and low temperature performance, etc. and fluoroethylene carbonate having improved discharge capacity, etc. are increasingly used as important additives for electrolytes, and finally such composite electrolytes are formed.
In view of the complex composition of the production raw materials of the electrolyte, a large amount of refractory wastewater containing fluorine, phosphorus and high organic concentration is produced in the production process, and the electrolyte has the characteristics of complex components, high salinity, irregular discharge and strong corrosiveness, and the existing materialized defluorination and dephosphorization process is difficult to meet the requirements of advanced defluorination and dephosphorization of pretreatment, so that the electrolyte is always a pain point for wastewater treatment in the lithium battery electrolyte industry.
Through the inquiry of published literature data, technical vacuum exists in domestic treatment research or engineering application of the type of wastewater, and along with the increasingly strict wastewater discharge standard, the requirements of deep defluorination and dephosphorization of the type of wastewater are more urgent.
Chinese patent document "CN112607917A" discloses a "treatment method and treatment system for fluorine-containing wastewater", which is carried out by Ca (OH) 2 The wastewater is treated by the precipitation and the oxidant, and the process can remove fluorine, but the total phosphorus content is 5-6 ppm (mg/L) and cannot reach a lower level.
Disclosure of Invention
The invention aims to provide a deep defluorination and dephosphorization treatment method for waste water in the production of composite electrolyte, which solves the problems of defluorination and dephosphorization of the waste water in the production of lithium battery composite electrolyte.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a deep defluorination and dephosphorization treatment method for waste water in composite electrolyte production, which comprises the following steps:
s1, adding concentrated H into the wastewater 2 SO 4 Or HNO (HNO) 3 Simultaneously adding composite silicon which is at least one of silicate compound and silicon dioxide, and increasing the temperature;
s2, adding a calcium hydroxide suspension, a dephosphorizing agent and a defluorinating agent into the S1 wastewater;
s3, adding PAM flocculant, pumping to a plate frame for squeezing, discharging sediment, and allowing clear liquid to flow into a subsequent process.
Preferably, the wastewater temperature in S1 is 93-97deg.C, the wastewater temperature in S2 is 95deg.C, and the wastewater temperature in S3 is 25deg.C.
Preferably, S1 adds H to the wastewater 2 SO 4 The concentration of (2) is 98%, or HNO is added 3 The concentration of (2) is 30%, and the adding ratio is 1.5 with the volume ratio of the wastewater: 100 S2, adding calcium hydroxide into the wastewater to raise the pH value to 9-11.
Preferably, the reaction residence time in S1 is from 6 to 8 hours, the reaction residence time in S2 is 2 hours and the reaction residence time in S3 is 0.5 hours.
Preferably, the wastewater is heated by passing steam into the wastewater and/or by using monel heat exchangers.
Preferably, the wastewater is treated in S1 and/or S2 and/or S3 in the form of stirred circulation fluidization.
Preferably, in S1 and S2, the completely mixed liquid enters the next processing procedure, and in S3, the supernatant enters the next processing procedure.
Preferably, the waste gas treatment procedures are also arranged in S1, S2 and S3, and the collected waste gas is subjected to comprehensive treatment of oxidation spraying, alkali spraying and biological deodorization.
Preferably, S1, S2 and S3 are used for treating wastewater by adopting a serial continuous flow fluidized bed, a sequencing batch fluidized bed or a reaction kettle.
Preferably, in S1, lanthanide metal is also added to the wastewater as a catalyst for the reaction.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the advanced defluorination and dephosphorization treatment method for the production wastewater of the composite electrolyte breaks through the technical barrier of advanced defluorination and dephosphorization pretreatment for the production wastewater of the lithium battery electrolyte, can achieve the pretreatment process purposes of less than 10ppm of fluorine and less than 2ppm of phosphorus, and enters a biochemical treatment system for advanced removal of COD, ammonia nitrogen and total nitrogen after pretreatment.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a process flow diagram of a preferred embodiment of the present invention;
fig. 2 is a step diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 and 2, the deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater comprises the following steps:
s1, adding 98% of H into the wastewater 2 SO 4 The adding proportion is 1.5% of the volume of the wastewater, steam is introduced into the wastewater for cyclic heating, the temperature is maintained between 93 ℃ and 97 ℃, a stirrer is started, the rotating speed is adjusted to 300r/min, and the reaction time is 6h;
s2, adding calcium hydroxide suspension into the wastewater until the pH value rises to 9-11, adding a defluorinating agent and a dephosphorizing agent, stirring and reacting for 30min, and adding PAC;
s3, adding PAM flocculant, regulating the stirring rotation speed to 60r/min, stirring for 5min, pumping to a plate-and-frame filter press, performing sludge outsourcing treatment, and allowing clear liquid to flow into a subsequent treatment process.
The heating mode that this example adopted is directly let in steam in the aquatic heating, and steam utilization is high like this to the comdenstion water directly gets into waste water and need not extra collection and treatment, easy operation.
S1, S2 and S3 are also provided with waste gas treatment procedures, and the collected waste gas is subjected to comprehensive treatment of oxidation spraying, alkali spraying and biological deodorization.
The test was used to examine the wastewater treatment results as follows.
Taking two liters of wastewater containing composite electrolyte, wherein the wastewater contains 2000ppm of lithium hexafluorophosphate, 25ppm of lithium bis-fluorosulfonyl imide, 15ppm of various additives and solvents, and finally converting the total phosphorus to 400ppm and 1600ppm of fluoride ions, adding 30ml of concentrated sulfuric acid (98%) and 5g of composite silicon catalyst (the main component is silicon dioxide) into the wastewater, heating to 95 ℃, starting a stirrer, adjusting the rotating speed to 300r/min, stirring at constant temperature for 6h, adding calcium hydroxide after the reaction is finished, adjusting the pH value to 10, adding a fluorine removing agent and a phosphorus removing agent, stirring for 2h, adding PAC, stirring for 0.5h, adding PAM, adjusting the rotating speed to 60r/min, stirring for 10min, standing, precipitating, taking supernatant for assay analysis, and finally obtaining the detection result that the fluorine is less than 10ppm and the phosphorus is less than 2ppm.
Although 98% of concentrated H is added in this example 2 SO 4 However, HNO having a concentration of 30% may be added 3 . But add HNO 3 When the method is used, the requirements on the reactor are high, and the reactor is easy to corrode.
The invention breaks through the technical barriers of advanced defluorination and dephosphorization pretreatment of lithium battery electrolyte wastewater, can achieve the pretreatment process purposes of less than 10ppm of fluorine and less than 2ppm of phosphorus, has good defluorination and dephosphorization effects, and then enters a biochemical treatment system for advanced removal of COD, ammonia nitrogen and total nitrogen.
The process has the following advantages: the invention adopts a multistage series fluidized bed process, has simple route, good mixing and homogenizing reaction effect and strong shock resistance; the process control parameters are few and easy to quantify, the types of medicines are conventional, and the operation cost is low; and moreover, automatic operation can be realized, so that the labor cost is greatly saved, and the process operation control risk is reduced.
The invention adopts serial continuous flow fluidized bed process operation, if the operation equipment of sequencing batch fluidized bed or reaction kettle is adopted, the pretreatment effect can be achieved by adopting the operation parameters in the invention, and the efficiency is only slightly low, thus the invention is simple in change and also in the protection scope of the invention.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater is characterized by comprising the following steps of:
s1, adding concentrated H into the wastewater 2 SO 4 Or HNO (HNO) 3 Simultaneously adding composite silicon which is at least one of silicate compound and silicon dioxide, and increasing the temperature;
s2, adding a calcium hydroxide suspension, a dephosphorizing agent and a defluorinating agent into the S1 wastewater;
s3, adding PAM flocculant, pumping to a plate frame for squeezing, discharging sediment, and allowing clear liquid to flow into a subsequent process.
2. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: the temperature of the wastewater in S1 is 93-97 ℃, the temperature of the wastewater in S2 is 95 ℃, and the temperature of the wastewater in S3 is 25 ℃.
3. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: s1 adding H into the wastewater 2 SO 4 The concentration of (2) is 98%, or HNO is added 3 The concentration of (2) is 30%, and the adding ratio is 1.5 with the volume ratio of the wastewater: 100 S2, adding calcium hydroxide into the wastewater to raise the pH value to 9-11.
4. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: the reaction residence time in S1 is 6-8h, the reaction residence time in S2 is 2h, and the reaction residence time in S3 is 0.5h.
5. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: the wastewater is heated by passing steam into the wastewater and/or by using a monel heat exchanger.
6. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: and S1 and/or S2 and/or S3 adopts a stirring circulating fluidization mode to treat the wastewater.
7. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: s1 and S2 are that the complete mixed solution enters the next processing procedure, and S3 is that the supernatant enters the next processing procedure.
8. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: s1, S2 and S3 are also provided with waste gas treatment procedures, and the collected waste gas is subjected to comprehensive treatment of oxidation spraying, alkali spraying and biological deodorization.
9. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: s1, S2 and S3 are that a serial continuous flow fluidized bed, a sequencing batch fluidized bed or a reaction kettle is adopted to treat the wastewater.
10. The deep defluorination and dephosphorization treatment method for the composite electrolyte production wastewater, which is characterized by comprising the following steps of: in S1, lanthanide metal is also added into the wastewater as a catalyst for the reaction.
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| CN202311480655.9A CN117303657A (en) | 2023-11-08 | 2023-11-08 | Advanced defluorination and dephosphorization treatment method for composite electrolyte production wastewater |
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