CN110217931A - A kind of recycling treatment process of spent acid - Google Patents
A kind of recycling treatment process of spent acid Download PDFInfo
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- CN110217931A CN110217931A CN201910586340.XA CN201910586340A CN110217931A CN 110217931 A CN110217931 A CN 110217931A CN 201910586340 A CN201910586340 A CN 201910586340A CN 110217931 A CN110217931 A CN 110217931A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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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
- C02F2001/007—Processes including a sedimentation step
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Abstract
The invention discloses a kind of recycling treatment process of spent acid, comprising the following steps: step 1: being handled using acidproof nanofiltration technique+diffusion dialysis technique, carries out acid recovery；Step 2: being added ammonia spirit into the saturating raffinate of diffusion dialysis technique and sufficiently reacted, and obtains alum precipitating and is mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride；Then alum precipitating and ammonium salt solution are separated by centrifugal separation process；Step 3: alum precipitating obtains electronics (jewel) grade aluminum oxide by washing, drying and calcination technique；Step 4: it is carried out using reverse osmosis process+electrodialysis process into processing；Step 5: the concentrated water that electrodialysis process generates is handled by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride product.The present invention may be implemented in acid pickle 90% or more it is sour recycle, while available electronics (jewel) grade aluminum oxide has very high value.
Description
Technical field
The present invention relates to a kind of recycling treatment process of spent acid.
Background technique
Aluminium electrolutic capacitor is widely used in household electrical appliance, computer, communication, Industry Control, electric car, electric locomotive
And in military and aerospace equipment.The preparation process flow of aluminium electrolutic capacitor includes aluminium foil corrosion, oxidation film chemical conversion, aluminium foil cutting
Deng.Wherein, the key for determining aluminium electrolutic capacitor performance height is to carry out the corrosion of aluminium foil, the pellumina table after excessive erosion
Area is multiplied, its capacity is accomplished very big.Currently, expanding aluminium foil surface product frequently with chemical corrosion method.
In the corrosion process of electrode foil, corrosive liquid is mainly formulated by sulfuric acid, hydrochloric acid by a certain percentage, aluminium foil conduct
By uniform electrochemical corrosion in the case where logical direct current, the pure aluminum of Anodic will become aluminium ion and enters liquid anode
System exists in the case where dilute sulfuric acid corrosion with aluminum sulfate, and when aluminium composition reaches a certain level, acidity therein can not
When meeting the electrochemical corrosion liquid environment of aluminium foil, it will act as acid pickle discharge etched foil process system, become spent acid.
Domestic universal processing method is to mix spent acid with milk of lime neutralization reaction generation gypsum, gypsum tailings occurs now
Solid state fermentation is used as after removing moisture by centrifuge separation.The main problem of the processing method is that the utility value of spent acid is low, is made
At the waste of utility；And a large amount of waste residue is produced, processing cost is high, and operating environment is very poor.
Therefore, Many researchers, which propose, is recycled electrode foil corrosion waste acid liquid.For example, patent
CN108862348A and patent CN108033472A discloses a kind of recoverying and utilizing method of electrode foil corrosion waste acid.By using
The method of evaporation and concentration separates the aluminum sulfate crystals in spent acid, and acid concentration can recycle after being promoted；This method both recycled
Acid, aluminum sulfate product of having got back；It is significantly improved compared in milk of lime with technique, the technology.But evaporation technology
Energy consumption is very big, and finally recycles that obtained aluminum sulfate value of the product is lower, and operating cost is too high.Patent CN106430270A is also public
A kind of method using electrode foil corrosion Waste Sulfuric Acid production poly aluminium sulfate is opened.The technology is by chemical reaction, although final obtain
Poly aluminium sulfate product is arrived, but the value of poly aluminium sulfate product is lower.
Summary of the invention
The object of the present invention is to provide a kind of recycling treatment process of spent acid, realize in acid pickle that 90% or more sour follows
Ring utilizes, while electronics (jewel) grade aluminum oxide of available high value.
Realizing the technical solution of the object of the invention is: a kind of recycling treatment process of spent acid, comprising the following steps:
Step 1: being filtered corrosion waste acid liquid using acidproof nanofiltration technique, removes the Al in spent acid3+, penetrated
Then liquid and concentrate handle concentrate using diffusion dialysis technique, obtain dialyzate and saturating raffinate；Wherein, it penetrates
Liquid and dialyzate are the recovery acid for reaching reuse standard；
Step 2: ammonia spirit is added into the saturating raffinate of diffusion dialysis technique and is sufficiently reacted, alum is obtained
Precipitate and be mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride；Then by centrifugal separation process separate alum precipitating and
Ammonium salt solution；
Step 3: alum precipitating obtains electronics (jewel) grade aluminum oxide by washing, drying and calcination technique；
Step 4: being handled ammonium salt solution using reverse osmosis process, then using electrodialysis process to reverse osmosis work
The concentrated water that skill generates is further processed；
Step 5: handling the concentrated water that electrodialysis process generates by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride produces
Product.
Nanofiltration retaining molecular weight 150Da~300Da in acidproof nanofiltration technique in the step 1, nanofiltration membrane operations
Pressure 2.0MPa~6.0MPa, 20 DEG C -35 DEG C of operation temperature.
The concentration for the ammonia spirit being added in the step 2 is 25%~28%.
In the step 3 specifically: alum precipitating first passes through pure water and is washed, until it is neutral, obtain high-purity
Ammonium aluminum sulfate crystal；Then ammonium aluminum sulfate crystal is obtained into electronics (jewel) grade aluminum oxide by dry and high-temperature calcination.
The drying temperature of the ammonium aluminum sulfate crystal is 80 DEG C~120 DEG C, and drying time is 8h~12h.
The temperature of the high-temperature calcination is 600 DEG C~800 DEG C, and calcination time is 2h~4h.
The fresh water obtained after reverse osmosis process processing ammonium salt solution in the step 4 is followed as the slurry of third step
Ring uses.
The production water conductivity of reverse osmosis membrane in the reverse osmosis process≤50 μ S/cm, the concentrated water that reverse osmosis process obtains
TDS content be 3%~5%.
The fresh water that electrodialysis process obtains in the step 4 is back to reverse osmosis process front end, the original with reverse osmosis process
Water mixing, then continued with through reverse osmosis membrane.
The TDS content for the fresh water that the electrodialysis process obtains is 0.8%~1.2%, the concentrated water that electrodialysis process obtains
TDS content be 16%~20%.
Using above-mentioned technical proposal, the present invention has the following beneficial effects: (1) present invention may be implemented in acid pickle
90% or more it is sour recycle, while available electronics (jewel) grade aluminum oxide has very high value；And it produced
Recycling for water resource may be implemented in journey, not new waste liquid generates, realizes the zero-emission of waste, will not make to environment
At pollution.
(2) present invention carries out acid recovery using the group technology of " nanofiltration+diffusion dialysis ", compared with the prior art using single
One diffusion dialysis acid recovery process, acid recovering rate increase 10% or more.
(3) present invention obtains electronics (jewel) grade aluminum oxide, and purity can achieve 99.999% or more, and value is much higher than
The products such as aluminum sulfate.Compared to published technique, the value of the utilization of resources is higher.
(4) present invention uses the group technology of " reverse osmosis+electrodialysis ", and reverse osmosis production water can be used as alum
Slurry does not need to add new water resource；Electrodialytic fresh water may return to reverse osmosis front end, circulation concentration again.It realizes
Recycling for water resource, reduces the waste of resource and the generation of waste water.
(5) compared with prior art, the present invention realizing recycling for all resources, not no waste water,waste gas and industrial residue
Outlet is a kind of environmentally protective technology.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail, wherein
Fig. 1 is process flow chart of the invention.
Specific embodiment
(embodiment 1)
See Fig. 1, the recycling treatment process of the spent acid of the present embodiment, comprising the following steps:
Step 1: being filtered corrosion waste acid liquid using acidproof nanofiltration technique, removes the Al in spent acid3+, penetrated
Liquid and concentrate.Nanofiltration retaining molecular weight 150Da~300Da in acidproof nanofiltration technique, nanofiltration membrane operating pressure 2.0MPa
~6.0MPa, 20 DEG C -35 DEG C of operation temperature.Wherein permeate is to reach the recovery acid of reuse standard, be can be recycled.By resistance to
Treated that related data is as shown in the table for sour nanofiltration technique:
| Detection project | Total acid (mol/L) | Al3+Concentration (mol/L) |
| Spent acid stoste | 5.298 | 0.446 |
| Recovery acid | 4.862 | 0.014 |
| Nanofiltration membrane concentrate | 5.854 | 0.778 |
Nanofiltration membrane is 50% to the rate of recovery of acid, to Al3+Removal rate be 97%, after nanofiltration membrane treatment acid meet
The standard of reuse.
Then the concentrate of acidproof nanofiltration technique is handled using diffusion dialysis technique, obtains dialyzate and thoroughly residual
Liquid.Wherein dialyzate is the recovery acid for reaching reuse standard, be can be recycled.The rate of recovery of acid is 86.5%, Al3+Separation rate
It is 96.9%.Specific data are as shown in the table.
Step 1: total acid recovering rate >=90%.
Step 2: ammonia spirit is added into the saturating raffinate of diffusion dialysis technique and is sufficiently reacted, alum is obtained
Precipitate and be mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride.Wherein, the concentration of ammonia spirit is 25%~28%, ammonium hydroxide mistake
Amount 5%, is sufficiently stirred reaction time 1h.Then alum precipitating and ammonium salt solution are separated by centrifugal separation process.
Step 3: alum precipitating obtains electronics (jewel) grade aluminum oxide by washing, drying and calcination technique.Tool
Body are as follows: alum precipitating first passes through pure water and is washed, until it is neutral, obtain the ammonium aluminum sulfate crystal of high-purity；Then will
By dry (drying temperature is 80 DEG C, drying time 12h) and high-temperature calcination, (temperature is 600 DEG C to ammonium aluminum sulfate crystal, calcining
Time is 4h), electronics (jewel) grade aluminum oxide is obtained, purity reaches 99.999%.
Step 4: being handled ammonium salt solution using reverse osmosis process, is obtained after reverse osmosis process processing ammonium salt solution
Fresh water as third step slurry be recycled.The production water conductivity of reverse osmosis membrane in reverse osmosis process is 35 μ S/
Cm, the TDS content for the concentrated water that reverse osmosis process obtains are 3%.
Then it is further processed using the concentrated water that electrodialysis process generates reverse osmosis process.Electrodialysis process obtains
Fresh water be back to reverse osmosis process front end, mixed with the raw water of reverse osmosis process, then continued with through reverse osmosis membrane.Electrodialysis
The TDS content for the fresh water that technique obtains is 0.8%, and the TDS content for the concentrated water that dialysis technique obtains is 16%.
Step 5: handling the concentrated water that electrodialysis process generates by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride produces
Product.
(embodiment 2)
The recycling treatment process of the spent acid of the present embodiment, comprising the following steps:
Step 1: being filtered corrosion waste acid liquid using acidproof nanofiltration technique, removes the Al in spent acid3+, penetrated
Liquid and concentrate.Nanofiltration retaining molecular weight 150Da~300Da in acidproof nanofiltration technique, nanofiltration membrane operating pressure 2.0MPa
~6.0MPa, 20 DEG C -35 DEG C of operation temperature.Wherein permeate is to reach the recovery acid of reuse standard, be can be recycled.By resistance to
Treated that related data is as shown in the table for sour nanofiltration technique:
| Detection project | Total acid (mol/L) | Al3+Concentration (mol/L) |
| Spent acid stoste | 6.323 | 0.266 |
| Recovery acid | 5.782 | 0.008 |
| Nanofiltration membrane concentrate | 6.852 | 0.464 |
Nanofiltration membrane is 50% to the rate of recovery of acid, to Al3+Removal rate be 97%, after nanofiltration membrane treatment acid meet
The standard of reuse.
Then the concentrate of acidproof nanofiltration technique is handled using diffusion dialysis technique, obtains dialyzate and thoroughly residual
Liquid.Wherein dialyzate is the recovery acid for reaching reuse standard, be can be recycled.The rate of recovery of acid is 86.5%, Al3+Separation rate
It is 96.9%.Specific data are as shown in the table.
| Detection project | Total acid (mol/L) | Al3+Concentration (mol/L) |
| Nanofiltration membrane concentrate | 6.852 | 0.464 |
| Dialyzate | 4.803 | 0.014 |
| Saturating raffinate | 1.574 | 0.458 |
Step 1: total acid recovering rate >=90%.
Step 2: ammonia spirit is added into the saturating raffinate of diffusion dialysis technique and is sufficiently reacted, alum is obtained
Precipitate and be mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride.Wherein, the concentration of ammonia spirit is 25%~28%, ammonium hydroxide mistake
Amount 5%, is sufficiently stirred reaction time 1h.Then alum precipitating and ammonium salt solution are separated by centrifugal separation process.
Step 3: alum precipitating obtains electronics (jewel) grade aluminum oxide by washing, drying and calcination technique.Tool
Body are as follows: alum precipitating first passes through pure water and is washed, until it is neutral, obtain the ammonium aluminum sulfate crystal of high-purity；Then will
By dry (drying temperature is 100 DEG C, drying time 10h) and high-temperature calcination, (temperature is 700 DEG C to ammonium aluminum sulfate crystal, is forged
The burning time is 3h), electronics (jewel) grade aluminum oxide is obtained, purity reaches 99.999%.
Step 4: being handled ammonium salt solution using reverse osmosis process, is obtained after reverse osmosis process processing ammonium salt solution
Fresh water as third step slurry be recycled.The production water conductivity of reverse osmosis membrane in reverse osmosis process is 40 μ S/
Cm, the TDS content for the concentrated water that reverse osmosis process obtains are 4%.
Then it is further processed using the concentrated water that electrodialysis process generates reverse osmosis process.Electrodialysis process obtains
Fresh water be back to reverse osmosis process front end, mixed with the raw water of reverse osmosis process, then continued with through reverse osmosis membrane.Electrodialysis
The TDS content for the fresh water that technique obtains is 1%, and the TDS content for the concentrated water that dialysis technique obtains is 18%.
Step 5: handling the concentrated water that electrodialysis process generates by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride produces
Product.
(embodiment 3)
The recycling treatment process of the spent acid of the present embodiment, comprising the following steps:
Step 1: being filtered corrosion waste acid liquid using acidproof nanofiltration technique, removes the Al in spent acid3+, penetrated
Liquid and concentrate.Nanofiltration retaining molecular weight 150Da~300Da in acidproof nanofiltration technique, nanofiltration membrane operating pressure 2.0MPa
~6.0MPa, 20 DEG C -35 DEG C of operation temperature.Wherein permeate is to reach the recovery acid of reuse standard, be can be recycled.By resistance to
Treated that related data is as shown in the table for sour nanofiltration technique:
| Detection project | Total acid (mol/L) | Al3+Concentration (mol/L) |
| Spent acid stoste | 8.530 | 0.330 |
| Recovery acid | 7.828 | 0.010 |
| Nanofiltration membrane concentrate | 9.425 | 0.575 |
Nanofiltration membrane is 50% to the rate of recovery of acid, to Al3+Removal rate be 97%, after nanofiltration membrane treatment acid meet
The standard of reuse.
Then the concentrate of acidproof nanofiltration technique is handled using diffusion dialysis technique, obtains dialyzate and thoroughly residual
Liquid.Wherein dialyzate is the recovery acid for reaching reuse standard, be can be recycled.The rate of recovery of acid is 86.5%, Al3+Separation rate
It is 96.9%.Specific data are as shown in the table.
| Detection project | Total acid (mol/L) | Al3+Concentration (mol/L) |
| Nanofiltration membrane concentrate | 9.425 | 0.575 |
| Dialyzate | 6.607 | 0.017 |
| Saturating raffinate | 2.165 | 0.567 |
Step 1: total acid recovering rate >=90%.
Step 2: ammonia spirit is added into the saturating raffinate of diffusion dialysis technique and is sufficiently reacted, alum is obtained
Precipitate and be mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride.Wherein, the concentration of ammonia spirit is 25%~28%, ammonium hydroxide mistake
Amount 5%, is sufficiently stirred reaction time 1h.Then alum precipitating and ammonium salt solution are separated by centrifugal separation process.
Step 3: alum precipitating obtains electronics (jewel) grade aluminum oxide by washing, drying and calcination technique.Tool
Body are as follows: alum precipitating first passes through pure water and is washed, until it is neutral, obtain the ammonium aluminum sulfate crystal of high-purity；Then will
By dry (drying temperature is 120 DEG C, drying time 8h) and high-temperature calcination, (temperature is 800 DEG C to ammonium aluminum sulfate crystal, calcining
Time is 2h), electronics (jewel) grade aluminum oxide is obtained, purity reaches 99.999%.
Step 4: being handled ammonium salt solution using reverse osmosis process, is obtained after reverse osmosis process processing ammonium salt solution
Fresh water as third step slurry be recycled.The production water conductivity of reverse osmosis membrane in reverse osmosis process is 45 μ S/
Cm, the TDS content for the concentrated water that reverse osmosis process obtains are 5%.
Then it is further processed using the concentrated water that electrodialysis process generates reverse osmosis process.Electrodialysis process obtains
Fresh water be back to reverse osmosis process front end, mixed with the raw water of reverse osmosis process, then continued with through reverse osmosis membrane.Electrodialysis
The TDS content for the fresh water that technique obtains is 1.82%, and the TDS content for the concentrated water that dialysis technique obtains is 20%.
Step 5: handling the concentrated water that electrodialysis process generates by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride produces
Product.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of recycling treatment process of spent acid, it is characterised in that: the following steps are included:
Step 1: being filtered corrosion waste acid liquid using acidproof nanofiltration technique, removes the Al in spent acid3+, obtain permeate and
Then concentrate handles concentrate using diffusion dialysis technique, obtains dialyzate and saturating raffinate；Wherein, permeate and
Dialyzate is the recovery acid for reaching reuse standard；
Step 2: being added ammonia spirit into the saturating raffinate of diffusion dialysis technique and sufficiently reacted, and obtains alum precipitating
And it is mixed with the ammonium salt solution of ammonium sulfate and ammonium chloride；Then alum precipitating and ammonium salt are separated by centrifugal separation process
Solution；
Step 3: alum precipitating obtains electronics grade aluminum oxide by washing, drying and calcination technique；
Step 4: being handled ammonium salt solution using reverse osmosis process, is then produced using electrodialysis process to reverse osmosis process
Raw concentrated water is further processed；
Step 5: the concentrated water that electrodialysis process generates is handled by evaporative crystallization technique, obtains ammonium sulfate and ammonium chloride product.
2. a kind of recycling treatment process of spent acid according to claim 1, it is characterised in that: resistance in the step 1
Nanofiltration retaining molecular weight 150Da~300Da in sour nanofiltration technique, nanofiltration membrane operating pressure 2.0MPa~6.0MPa, operation
20 DEG C -35 DEG C of temperature.
3. a kind of recycling treatment process of spent acid according to claim 1, it is characterised in that: be added in the step 2
Ammonia spirit concentration be 25%~28%.
4. a kind of recycling treatment process of spent acid according to claim 1, it is characterised in that: specific in the step 3
Are as follows: alum precipitating first passes through pure water and is washed, until it is neutral, obtain the ammonium aluminum sulfate crystal of high-purity；Then by sulphur
Sour aluminium ammonium crystal obtains electronics grade aluminum oxide by dry and high-temperature calcination.
5. a kind of recycling treatment process of spent acid according to claim 4, it is characterised in that: the ammonium aluminum sulfate crystal
Drying temperature be 80 DEG C~120 DEG C, drying time be 8h~12h.
6. a kind of recycling treatment process of spent acid according to claim 4, it is characterised in that: the temperature of the high-temperature calcination
Degree is 600 DEG C~800 DEG C, and calcination time is 2h~4h.
7. a kind of recycling treatment process of spent acid according to claim 1, it is characterised in that: reverse osmosis in the step 4
The fresh water obtained after saturating process ammonium salt solution is recycled as the slurry of third step.
8. a kind of recycling treatment process of spent acid according to claim 1 or claim 7, it is characterised in that: the reverse osmosis work
The production water conductivity of reverse osmosis membrane in skill≤50 μ S/cm, the TDS content for the concentrated water that reverse osmosis process obtains are 3%~5%.
9. a kind of recycling treatment process of spent acid according to claim 1, it is characterised in that: electric osmose in the step 4
The fresh water that analysis technique obtains is back to reverse osmosis process front end, mixes with the raw water of reverse osmosis process, then continue through reverse osmosis membrane
Processing.
10. according to claim 1 or a kind of recycling treatment process of spent acid described in 9, it is characterised in that: the electrodialysis work
The TDS content for the fresh water that skill obtains is 0.8%~1.2%, the TDS content of the concentrated water that electrodialysis process obtains is 16%~
20%.
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| CN111495190A (en) * | 2020-04-28 | 2020-08-07 | 江苏永葆环保科技有限公司 | Comprehensive utilization method of aluminum-containing waste acid |
| CN111591967A (en) * | 2020-05-29 | 2020-08-28 | 盛隆资源再生（无锡）有限公司 | Recovery processing method of phosphoric acid waste acid |
| CN112794292A (en) * | 2021-04-15 | 2021-05-14 | 杭州水处理技术研究开发中心有限公司 | Method and system for purifying and recycling waste sulfuric acid |
| CN113336251A (en) * | 2021-07-12 | 2021-09-03 | 新疆智诚同欣环保科技有限公司 | Method for producing high-purity alumina from electrode foil waste sulfuric acid |
| CN113371887A (en) * | 2021-07-12 | 2021-09-10 | 山东格兰克环保新材料有限公司 | Waste acid purification method and system for pickling treatment of metal surface of iron part |
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| CN115925160A (en) * | 2022-11-28 | 2023-04-07 | 南通三圣石墨设备科技股份有限公司 | Waste acid full-recycling zero-emission treatment method in graphene production process |
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| DE102022104474A1 (en) * | 2022-02-24 | 2023-08-24 | Spiraltec Gmbh | Separation of acids or bases from acidic or alkaline aqueous solutions containing dissolved metal ions |
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| CN114804496A (en) * | 2021-05-13 | 2022-07-29 | 上海清如环保科技有限公司 | Recycling treatment process and device for aluminum foil corrosion waste acid |
| CN113336251A (en) * | 2021-07-12 | 2021-09-03 | 新疆智诚同欣环保科技有限公司 | Method for producing high-purity alumina from electrode foil waste sulfuric acid |
| CN113371887A (en) * | 2021-07-12 | 2021-09-10 | 山东格兰克环保新材料有限公司 | Waste acid purification method and system for pickling treatment of metal surface of iron part |
| CN115925160A (en) * | 2022-11-28 | 2023-04-07 | 南通三圣石墨设备科技股份有限公司 | Waste acid full-recycling zero-emission treatment method in graphene production process |
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