CN213012379U - Acid liquor recovery system for aluminum foil pickling wastewater - Google Patents
Acid liquor recovery system for aluminum foil pickling wastewater Download PDFInfo
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- CN213012379U CN213012379U CN202021541055.0U CN202021541055U CN213012379U CN 213012379 U CN213012379 U CN 213012379U CN 202021541055 U CN202021541055 U CN 202021541055U CN 213012379 U CN213012379 U CN 213012379U
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- circulation jar
- jar
- acid
- water
- water circulation
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- 239000002253 acid Substances 0.000 title claims abstract description 43
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 239000002351 wastewater Substances 0.000 title claims abstract description 16
- 238000005554 pickling Methods 0.000 title claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 title claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 14
- 239000011888 foil Substances 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000243 solution Substances 0.000 claims abstract description 45
- 239000012528 membrane Substances 0.000 claims abstract description 38
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 30
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 9
- 239000005030 aluminium foil Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000007781 pre-processing Methods 0.000 claims abstract description 3
- 239000012266 salt solution Substances 0.000 claims description 12
- 239000012267 brine Substances 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000011550 stock solution Substances 0.000 abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 10
- 229910017604 nitric acid Inorganic materials 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 5
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- -1 nitrate ions Chemical class 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000909 electrodialysis Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses an aluminium foil pickling waste water acidizing fluid recovery system, irritate including the stock solution that is used for storing sodium nitrate solution, a bipolar membrane device that is used for carrying out concentrated reverse osmosis unit to sodium nitrate solution and is used for carrying out the electrolysis to sodium nitrate solution, install the salt water circulation jar respectively through three pipelines between reverse osmosis unit's the liquid outlet and the different inlets of bipolar membrane device, the acid water circulation jar, the buck circulation jar, one side of buck jar is provided with the utmost point water circulation jar, the salt water circulation jar, the acid water circulation jar, the buck circulation jar, all be provided with conveyer pump and preprocessing device between the liquid outlet of utmost point water circulation jar and the inlet of bipolar membrane device, and the liquid outlet of bipolar membrane device all installs the return pipe that links to each other with the salt water circulation jar, the acid water circulation jar, the buck circulation jar, the feed back mouth of utmost point water circulation jar, with the salt water circulation jar, the acid, The feed back pipeline connected with the alkaline water circulating tank is respectively connected with a dilute salt tank, an acid water tank and an alkaline water tank through pipelines.
Description
Technical Field
The utility model relates to a waste acid recovery field, in particular to aluminium foil pickling waste water acidizing fluid recovery system belongs to the application of bipolar membrane electrodialysis technique in aluminium foil pickling waste water acidizing fluid recovery.
Background
In the process of producing the aluminum foil, nitric acid is needed to be used for pickling the aluminum foil, a waste liquid containing nitric acid and aluminum nitrate is generated, sodium hydroxide is added to neutralize the nitric acid in the waste liquid and reacts with the aluminum nitrate to generate aluminum hydroxide precipitate, and a sodium nitrate wastewater and aluminum hydroxide residues are generated after a precipitation process. The process can produce a large amount of aluminum hydroxide solid waste, the treatment cost is high, in addition, a flocculating agent is additionally purchased for auxiliary precipitation, the production cost is increased, sodium nitrate wastewater is used as hazardous waste and cannot be directly discharged, and the environmental protection pressure and the treatment cost are brought to enterprises.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, the utility model aims to provide an aluminium foil pickling waste water acidizing fluid recovery system.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides an aluminium foil pickling waste water acidizing fluid recovery system, irritate including the stoste that is used for storing sodium nitrate solution, a bipolar membrane device for carrying out concentrated reverse osmosis unit to sodium nitrate solution and being used for carrying out the electrolysis to sodium nitrate solution, install the salt solution circulating tank respectively through three pipelines between reverse osmosis unit's the liquid outlet and the different inlets of bipolar membrane device, the acid water circulating tank, the buck circulating tank, one side of buck water jar is provided with the utmost point water circulation jar, the salt water circulating tank, the acid water circulating tank, the buck circulating tank, all be provided with conveyer pump and preprocessing device between the liquid outlet of utmost point water circulation jar and the inlet of bipolar membrane device, and the liquid outlet of bipolar membrane device all install respectively with the salt water circulation jar, the acid water circulating tank, the buck circulating tank, the feed back pipeline that the feed back mouth of utmost point water circulation.
More preferably: and the material return pipelines connected with the brine circulating tank, the acid water circulating tank and the alkaline water circulating tank are respectively connected with a dilute salt tank, an acid water tank and an alkaline water tank through pipelines.
More preferably: the pretreatment device comprises a filter and a heat exchanger in sequence, wherein a liquid inlet of the filter is connected with a liquid outlet of the conveying pump, and a liquid outlet of the heat exchanger is connected with a liquid inlet of the bipolar membrane device.
More preferably: the bipolar membrane device is provided with two polar water inlets, and a pipeline connected with the two polar water inlets is connected with a liquid outlet of the heat exchanger through a collecting pipe.
To sum up, the utility model discloses the beneficial effect who contrasts in prior art does: by adopting the bipolar membrane device, the sodium nitrate solution after the pretreatment processes of filtering, concentrating, removing aluminum and the like is subjected to electrolytic treatment, so that the electrolytic nitric acid recycled front-end process acid-washing aluminum foil can be realized, the electrolytic sodium hydroxide recycled front-end neutralizes the aluminum nitrate, the resource utilization of wastewater is realized, and the use amount of acid and alkali is reduced.
Drawings
FIG. 1 is a system framework diagram of an embodiment;
FIG. 2 is a process flow diagram of an embodiment.
Detailed Description
The following provides a more detailed description of the present invention with reference to the accompanying drawings.
An acid liquor recovery system for aluminum foil pickling wastewater, which is shown in figure 1, comprises a stock solution tank for storing a sodium nitrate solution, a reverse osmosis device for concentrating the sodium nitrate solution, a brine circulation tank for storing the sodium nitrate solution to be electrolyzed, a dilute salt tank for receiving the sodium nitrate solution after electrolysis, a filter 1 for filtering the sodium nitrate solution, a brine heat exchanger for cooling the sodium nitrate solution, an acid water circulation tank/an alkaline water circulation tank for storing pure water, a filter 2 for filtering the acid water solution, an acid water heat exchanger for cooling the acid water solution, a filter 3 for filtering the alkaline water solution, an alkaline water heat exchanger for cooling the alkaline water solution, an acid water tank for receiving the nitric acid solution after electrolysis, an alkaline water tank for receiving the sodium hydroxide solution after electrolysis, a water tank for storing the alkaline water solution after electrolysis, a water tank for, A polar water circulating tank for storing polar liquid, a filter 4 for filtering the polar water solution, a polar water heat exchanger for cooling the polar water solution, and a bipolar membrane device for electrolyzing the sodium nitrate solution.
The stock solution jar links to each other through stock solution elevator pump and pipeline and reverse osmosis unit's water inlet, reverse osmosis unit's dense water delivery port passes through the pipeline and links to each other with the water inlet of salt solution circulation jar, the export of salt solution circulation jar is connected with the water inlet of filter 1 through salt solution elevator pump and pipeline, the delivery port of filter 1 is connected with the water inlet of salt solution heat exchanger through pipeline, the delivery port of salt solution heat exchanger is connected with bipolar membrane device's salt solution water inlet through the pipeline, bipolar membrane device's salt solution delivery port is connected with salt solution circulation jar feed back entry and dilute salt jar inlet through pipeline.
The stock solution jar passes through stock solution elevator pump and pipeline and links to each other with reverse osmosis unit's water inlet, reverse osmosis unit's product water delivery port passes through the pipeline and links to each other with the water inlet of acid water circulation jar, the export of acid water circulation jar is connected with filter 2's water inlet through acid water elevator pump and pipeline, filter 2's delivery port is connected with the water inlet of acid water heat exchanger through pipeline, the delivery port of acid water heat exchanger is connected with bipolar membrane device's acid water inlet through the pipeline, bipolar membrane device's acid water delivery port is connected with acid water circulation jar feed back entry and acid water jar inlet through pipeline.
The raw liquor tank is connected with a water inlet of the reverse osmosis device through a raw liquor lifting pump and a conveying pipeline, a water production water outlet of the reverse osmosis device is connected with a water inlet of the alkaline water circulating tank through a pipeline, an outlet of the alkaline water circulating tank is connected with a water inlet of the filter 3 through an alkaline water lifting pump and a conveying pipeline, a water outlet of the filter 3 is connected with a water inlet of the alkaline water heat exchanger through a conveying pipeline, a water outlet of the alkaline water heat exchanger is connected with an alkaline water inlet of the bipolar membrane device through a pipeline, and an alkaline water outlet of the bipolar membrane device is connected with a feed back inlet of the alkaline water circulating tank and a.
The export of utmost point water circulation jar is connected with the water inlet of filter 4 through utmost point water elevator pump and pipeline, the delivery port of filter 4 is connected with the water inlet of utmost point water heat exchanger through pipeline, the delivery port of utmost point water heat exchanger is connected with the utmost point water inlet of bipolar membrane device through the pipeline, the utmost point water delivery port of bipolar membrane device is connected with the feed back entry of utmost point water circulation jar through pipeline, in this embodiment, bipolar membrane device is provided with two utmost point water inlets, the pipeline that two utmost point water inlets link to each other links to each other through the liquid outlet of header with the heat exchanger, bipolar membrane device is provided with two utmost point water delivery ports, the pipeline that two utmost point water delivery ports link to each other links to each other through the feed back entry of header with utmost point.
The process flow of the acid liquor recovery system for the aluminum foil pickling wastewater comprises the following steps: and (3) introducing the sodium nitrate solution subjected to neutralization, aluminum removal and concentration into a bipolar membrane electrodialysis device, electrolyzing under the action of an electric field to obtain a low-concentration sodium nitrate solution, a nitric acid solution and a sodium hydroxide solution, returning the low-concentration sodium nitrate solution to the front end to be continuously concentrated, recycling the nitric acid solution to the front end for pickling, and recycling the sodium hydroxide solution to the front end for neutralization and precipitation.
The above process flow, as shown in fig. 2, includes the following steps:
step 1, pretreating and concentrating a sodium nitrate solution: introducing the sodium nitrate solution subjected to pretreatment and metal ion removal into a reverse osmosis membrane system for concentration treatment, and increasing the concentration of the sodium nitrate solution to 8-9%, wherein the aperture of the reverse osmosis membrane is in a nanometer level, the operating pressure is 2-4MPa, and the working temperature of the system is 20-40 ℃;
step 2, electrolyzing the sodium nitrate solution: introducing the sodium nitrate solution obtained in the step 1 after pretreatment and concentration into a bipolar membrane system, wherein the operating voltage of the bipolar membrane is 1.8-2.5V per pair of membranes, the current density is 300-500A/m 2, and the operating temperature is 25-40 ℃; under the action of an electric field, nitrate ions in the sodium nitrate solution migrate to the acid water side through the anion exchange membrane and generate a nitric acid solution together with hydrogen ions generated by the electrolysis of the bipolar membrane; sodium ions migrate to the adjacent alkaline water side through the cation exchange membrane and generate sodium hydroxide solution with hydroxide ions generated by the electrolysis of the bipolar membrane. So that the content of sodium nitrate in the sodium nitrate solution is gradually reduced, the obtained dilute sodium nitrate solution flows back to the front-end reverse osmosis system for continuous concentration, and the acid water and the alkaline water are respectively converged and collected because the compartments are communicated with each other;
and 3, acid-base recycling: and conveying the electrolyzed nitric acid solution to the front end of the acid-washing aluminum foil through a lifting pump, and conveying the electrolyzed sodium hydroxide solution to the front end of the acid-washing aluminum foil through the lifting pump to neutralize nitric acid and aluminum nitrate.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (4)
1. The utility model provides an aluminium foil pickling waste water acidizing fluid recovery system, characterized by: including the stoste that is used for storing sodium nitrate solution irritate, a bipolar membrane device that is used for carrying out concentrated reverse osmosis unit and is used for carrying out the electrolysis to sodium nitrate solution, install the salt solution circulation jar respectively through three pipelines between reverse osmosis unit's the liquid outlet and the different inlets of bipolar membrane device, the acid water circulation jar, the buck circulation jar, one side of buck jar is provided with the utmost point water circulation jar, the salt solution circulation jar, the acid water circulation jar, the buck circulation jar, all be provided with delivery pump and preprocessing device between the liquid outlet of utmost point water circulation jar and the inlet of bipolar membrane device, and the liquid outlet of bipolar membrane device all install respectively with the salt solution circulation jar, the acid water circulation jar, the buck circulation jar, the feed back pipeline that the feed back mouth of utmost point water circulation jar links to each other.
2. The acid liquor recovery system for aluminum foil pickling wastewater as claimed in claim 1, wherein the acid liquor recovery system comprises: and the material return pipelines connected with the brine circulating tank, the acid water circulating tank and the alkaline water circulating tank are respectively connected with a dilute salt tank, an acid water tank and an alkaline water tank through pipelines.
3. The acid liquor recovery system for aluminum foil pickling wastewater as claimed in claim 1, wherein the acid liquor recovery system comprises: the pretreatment device comprises a filter and a heat exchanger in sequence, wherein a liquid inlet of the filter is connected with a liquid outlet of the conveying pump, and a liquid outlet of the heat exchanger is connected with a liquid inlet of the bipolar membrane device.
4. The acid liquor recovery system for aluminum foil pickling wastewater as claimed in claim 3, wherein the acid liquor recovery system comprises: the bipolar membrane device is provided with two polar water inlets, and a pipeline connected with the two polar water inlets is connected with a liquid outlet of the heat exchanger through a collecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021541055.0U CN213012379U (en) | 2020-07-30 | 2020-07-30 | Acid liquor recovery system for aluminum foil pickling wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021541055.0U CN213012379U (en) | 2020-07-30 | 2020-07-30 | Acid liquor recovery system for aluminum foil pickling wastewater |
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| CN213012379U true CN213012379U (en) | 2021-04-20 |
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| CN202021541055.0U Active CN213012379U (en) | 2020-07-30 | 2020-07-30 | Acid liquor recovery system for aluminum foil pickling wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113249582A (en) * | 2021-05-06 | 2021-08-13 | 中南大学 | Treatment method of aluminum metallurgy solid waste |
| CN114411157A (en) * | 2021-12-31 | 2022-04-29 | 乳源县立东电子科技有限公司 | Cleaning method for residual chloride ions in aluminum foil and application of cleaning method |
| CN114477570A (en) * | 2022-01-17 | 2022-05-13 | 宿迁市华力新材料科技有限公司 | Wash paper tinsel waste water recovery system |
| CN115974116A (en) * | 2022-12-31 | 2023-04-18 | 苏州金渠环保科技有限公司 | Novel resource utilization process of acidic wastewater |
-
2020
- 2020-07-30 CN CN202021541055.0U patent/CN213012379U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113249582A (en) * | 2021-05-06 | 2021-08-13 | 中南大学 | Treatment method of aluminum metallurgy solid waste |
| CN114411157A (en) * | 2021-12-31 | 2022-04-29 | 乳源县立东电子科技有限公司 | Cleaning method for residual chloride ions in aluminum foil and application of cleaning method |
| CN114477570A (en) * | 2022-01-17 | 2022-05-13 | 宿迁市华力新材料科技有限公司 | Wash paper tinsel waste water recovery system |
| CN115974116A (en) * | 2022-12-31 | 2023-04-18 | 苏州金渠环保科技有限公司 | Novel resource utilization process of acidic wastewater |
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Denomination of utility model: An acid recovery system for aluminum foil pickling wastewater Granted publication date: 20210420 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: Hangzhou Kerui Environmental Energy Technology Co.,Ltd. Registration number: Y2024980003983 |