CN111268654B - Device for removing aluminum ions in waste liquid - Google Patents
Device for removing aluminum ions in waste liquid Download PDFInfo
- Publication number
- CN111268654B CN111268654B CN202010182355.2A CN202010182355A CN111268654B CN 111268654 B CN111268654 B CN 111268654B CN 202010182355 A CN202010182355 A CN 202010182355A CN 111268654 B CN111268654 B CN 111268654B
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- Prior art keywords
- cavity
- sulfuric acid
- tank
- water
- aluminum ions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 24
- -1 aluminum ions Chemical class 0.000 title claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000003647 oxidation Effects 0.000 claims abstract description 35
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 35
- 238000000502 dialysis Methods 0.000 claims abstract description 25
- 238000009792 diffusion process Methods 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000012528 membrane Substances 0.000 claims description 20
- 150000001450 anions Chemical class 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims 1
- 150000002500 ions Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids
- C01B17/902—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids by dialysis
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
-
- 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
- C02F1/46—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
Abstract
An apparatus for removing aluminum ions from waste liquid comprises a diffusion dialyzer, a water tank, a pressure pump, a waste liquid storage tank and a sulfuric acid collection tank; the electrolyte of the oxidation tank flows into a diffusion dialyzer; the diffusion dialyzer comprises a box body and a dialysis unit tube; a plurality of dialysis unit pipes are arranged in the box body; the main pipe is communicated with the first cavity and the third cavity; the branch pipe is communicated with the second cavity; the third cavity is connected with a pressure pump; the third cavity is communicated with the sulfuric acid collection tank; the second cavity and the waste liquid storage tank; a control valve is arranged between the second cavity and the waste liquid storage tank. In the invention, the dialysis unit tube is used for separating the sulfuric acid in the waste liquid, so that the concentration of aluminum ions in the oxidation tank is reduced, and the utilization rate of the sulfuric acid is improved.
Description
Technical Field
The invention relates to the field of waste liquid purification, in particular to a device for removing aluminum ions in waste liquid.
Background
The anodic oxidation line generates a certain amount of sulfuric acid waste liquid in the production process, and the main pollution production section is an oxidation tank of the anodic oxidation production line. The main contaminant contains aluminum ions. In the oxidation process, the concentration of aluminum ions in the oxidation tank is continuously increased, when the concentration of aluminum ions is higher than 15g/l, the oxidation effect is affected, meanwhile, the oxidation time is prolonged, the power consumption is increased, the common practice is to drain 30% -50% of waste acid in the oxidation tank, and new sulfuric acid is prepared so as to reduce the concentration of aluminum ions, so that a large amount of sulfuric acid is wasted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device for removing aluminum ions from waste liquid, which reduces the concentration of the aluminum ions in an oxidation tank and improves the utilization rate of sulfuric acid.
The invention provides the following technical scheme:
an apparatus for removing aluminum ions from waste liquid comprises a diffusion dialyzer, a water tank, a pressure pump, a waste liquid storage tank and a sulfuric acid collection tank; the electrolyte of the oxidation tank flows into a diffusion dialyzer;
the diffusion dialyzer comprises a box body, wherein at least one dialysis unit tube is arranged in the box body; the box body comprises a first cavity, a second cavity and a third cavity; the second cavity and the third cavity are arranged below the first cavity;
the dialysis unit pipe comprises a main pipe and a branch pipe; the branch pipe is arranged at the middle part of the main pipe; the middle part of the branch pipe is bent, and the bending part is higher than the joint of the branch pipe and the main pipe; an anion homogeneous membrane is arranged in the main pipe; the anion homogeneous membrane is arranged below the joint of the branch pipe and the main pipe;
one end of the main pipe is communicated with the first cavity; the other end of the main pipe is communicated with the third cavity; the branch pipe is communicated with the second cavity; the third cavity is connected with a pressure pump pipeline.
Preferably, a feed inlet is arranged above the box body of the diffusion dialyzer; the feed inlet is funnel-shaped; the feed inlet is provided with a filter screen.
Preferably, a filter layer is arranged in the first cavity; the electrolyte of the oxidation tank passes through the filter layer and flows into the dialysis unit tube.
Preferably, the first water pump drives water in the water tank to flow into the second cavity and the third cavity; and control valves are arranged on the connecting pipelines of the second cavity, the third cavity and the water tank.
Preferably, the third cavity is connected with the sulfuric acid concentrator and the condensing pipe in sequence through pipelines; the acid-resistant pump drives the sulfuric acid in the third cavity to flow along the pipeline connection; the condenser condenses the water vapor generated by the sulfuric acid concentrator; the condenser is communicated with the water tank through a pipeline; the second water pump drives the water in the condenser to flow back into the water tank.
Preferably, the sulfuric acid outlet of the sulfuric acid concentrator is connected with the sulfuric acid collecting tank and the oxidation tank in sequence through pipelines; an acid-resistant pump is arranged on a pipeline between the sulfuric acid collecting tank and the oxidation tank.
Compared with the prior art, the invention has the following advantages and effects:
(1) In the invention, one side of the main pipe is communicated with the first cavity; the other side of the main pipe is communicated with the third cavity; an anion homogeneous membrane is arranged in the main pipe; the third cavity is connected with a pressure pump; the pressure in the third cavity is changed through a pressure pump, and the concentration of aluminum ions in the dialysis unit tube after dialysis is adjusted; when the pressure pump increases the pressure in the third cavity, the pressure difference at two sides of the anion homogeneous membrane can be reduced, and the service life of the anion homogeneous membrane is prolonged.
(2) In the invention, the middle of the branch pipe is bent upwards, and the upward bending part of the branch pipe is higher than the joint of the branch pipe and the main pipe; when the second cavity is in a closed state, electrolyte of the oxidation tank is prevented from directly flowing into the branch pipe; when the second cavity is in an open state, the dialyzed waste liquid automatically flows into the second cavity, so that the waste liquid and sulfuric acid are automatically separated, and the utilization rate of sulfuric acid is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of an apparatus for removing aluminum ions from waste streams in accordance with the present invention.
FIG. 2 is a block diagram of a diffusion dialyzer of the present invention.
FIG. 3 is a block diagram of a dialysis unit tube according to the present invention.
In the figure: 011 is a first water pump, 012 is a first acid-resistant pump, 013 is a second acid-resistant pump, 014 is a second water pump, 021 is a pressure pump, 031 is a first control valve, 032 is a first control valve, 033 is a third control valve, 034 is a fourth control valve, 035 is a second control valve, 036 is a sixth control valve, 1 is an oxidation tank, 2 is a diffusion dialyzer, 21 is a feed inlet, 22 is a filter screen, 23 is a filter layer, 24 is a first cavity, 25 is a dialysis unit pipe, 251 is a main pipe, 252 is a branch pipe, 26 is a second cavity, 27 is a third cavity, 28 is an anion homogeneous membrane, 29 is a box, 3 is a waste liquid storage tank, 4 is a sulfuric acid concentrator, 5 is a sulfuric acid collection pipe, 6 is a condenser, and 7 is a water tank.
Detailed Description
The specific implementation mode of the invention is as follows:
referring to fig. 1 to 3, an apparatus for removing aluminum ions from waste liquid comprises a diffusion dialyzer 2, a water tank 7, a pressure pump 021, a waste liquid storage tank 3, and a sulfuric acid collection tank 5; the electrolyte of the oxidation tank 1 flows into the diffusion dialyzer 2; a first control valve 031 is arranged on a connecting pipeline between the oxidation tank 1 and the diffusion dialyzer 2; the diffusion dialyzer 2 comprises a tank 29, a dialysis unit tube 25; a plurality of dialysis unit tubes 25 are arranged in the box 29; the box 29 comprises a first cavity 24, a second cavity 26 and a third cavity 27; the electrolyte of the oxidation tank 1 flows into the first cavity 24; the second and third cavities 26, 27 are disposed below the first cavity 24 so that the liquid in the first cavity 24 flows into the second and third cavities 26, 27.
The dialysis unit tube 25 includes a main tube 251, a branch tube 252; the branch pipe 252 is arranged at the middle position of the main pipe 251; the middle of the branch pipe 252 is bent upwards, the upwards bending part of the branch pipe 252 is higher than the joint of the branch pipe 252 and the main pipe 251, and when the second cavity 26 is in a closed state, the electrolyte of the oxidation tank is prevented from directly flowing into the branch pipe 252; an anion homogeneous membrane 28 is arranged in the main pipe 251; the anion homogeneous membrane 28 is disposed below the joint of the branch pipe 252 and the main pipe 251, and the electrolyte in the oxidation tank is dialyzed by the plurality of dialysis unit pipes 25, so that the problem of lower mechanical strength of the anion homogeneous membrane 28 can be solved.
Firstly, the anion homogeneous membrane 28 is positively charged, and has the characteristic of attracting negatively charged hydration ions and repelling positively charged hydration ions in solution, so that anions on the waste acid side are attracted and smoothly penetrate the anion homogeneous membrane 28 into the third cavity 27 under the action of concentration difference. Meanwhile, ions with positive charges can be entrained according to the requirement of electric neutrality, and the charge is less because the hydration radius of H+ is smaller; the metal salt has a larger radius of hydrated ions and is expensive, so that H+ preferentially passes through the membrane and the acid in the waste liquid of the dialysis unit tube 25 is separated.
One side of the main pipe 251 is communicated with the first cavity 24; the other side of the main pipe 251 is communicated with a third cavity 27; the branch pipe 252 is communicated with the second cavity 26; the third cavity 27 is connected with a pressure pump 021; the pressure in the third cavity 27 is changed through the pressure pump 021, the concentration of aluminum ions in the dialysis unit tube 25 after dialysis is adjusted, and the dialysis speed of the dialysis unit tube 25 is controlled; the third cavity 27 is communicated with the sulfuric acid collection tank 5; the second cavity 26 and the waste liquid storage tank 3; a fourth control valve 034 is arranged on the connecting pipeline between the second cavity 26 and the waste liquid storage tank 3.
A feed inlet 21 is arranged above the box body 29 of the diffusion dialyzer; the feed inlet 21 is funnel-shaped; a filter screen 22 is arranged at the feed inlet 21, and suspended matters of electrolyte in the oxidation tank are filtered through the filter screen 22; the filter screen 22 is arranged at the feed inlet 21, so that the filtered impurities can be cleaned conveniently; a filter layer 23 is arranged in the first cavity 24, and fine magazines of electrolyte in the oxidation tank are filtered through the filter layer 23; the electrolyte of the oxidation tank 1 passes through the filter layer 23 and flows into the dialysis unit tube 25.
The first water pump 011 drives water in the water tank 7 to flow into the second cavity 26 and the third cavity 27; a second control valve 032 is arranged on a connecting pipeline between the second cavity 26 and the water tank 7, water is injected into the third cavity 27 through a first water pump 011, and the concentration of sulfuric acid in the third cavity 27 is regulated; injecting water into the second cavity 26 through the first water pump 011 to clean the second cavity 26; a third control valve 033 is arranged on the connecting pipeline between the third cavity 27 and the water tank 7.
A sulfuric acid concentrator 4 is arranged on a connecting pipeline between the third cavity 27 and the sulfuric acid collection tank 5; heating and concentrating sulfuric acid by the sulfuric acid concentrator 4; a fifth control valve 035 is arranged between the sulfuric acid concentrator 4 and the diffusion dialyzer 2; the sulfuric acid concentrated by the sulfuric acid concentrator 4 flows into the sulfuric acid collection tank 5; a sixth control valve is arranged between the sulfuric acid collection tank 5 and the sulfuric acid concentrator 4; a condenser 6 condenses the water vapor generated by the sulfuric acid concentrator 4; the water condensed by the condenser 6 flows into the water tank 7 by the second water pump 014, so that the water resource can be reused; the sulfuric acid collection tank 5 is used for cooling and heating the concentrated sulfuric acid; the second acid-resistant pump 013 drives the sulfuric acid in the sulfuric acid collecting tank 5 to flow into the oxidation tank 1, so that the recycling of the sulfuric acid is realized, and the utilization rate of the sulfuric acid is improved.
Working principle: when the staff detects that the concentration of the electrolyte aluminum ions in the oxidation tank 1 is too high, the first control valve 031 is opened, so that the electrolyte in the oxidation tank 1 flows into the diffusion dialyzer 2; filtering the suspension of the electrolyte in the oxidation tank through a filter screen 22; filtering the fine magazines of the electrolyte in the oxidation tank through a filter layer 23; the sulfuric acid is filtered through an anionic homogeneous membrane 28.
Injecting water into the third cavity 27 through the first water pump 011, adjusting the concentration of sulfuric acid in the third cavity 27, reducing the concentration of sulfuric acid in the third cavity 27, and improving the dialysis rate of the anion homogeneous membrane 28 on sulfate radicals; the sulfuric acid concentration of the third cavity 27 is regulated by a second control valve 032 and a fourth control valve, and the concentration difference of the anion homogeneous membrane 28 is regulated; the pressure in the third cavity 27 is changed through the pressure pump 021, the height of the waste liquid in the main pipe 251 is changed during balance, the regulation of aluminum ions in the waste liquid is realized, the pressure born by the anion homogeneous membrane 28 can be reduced, and the service life of the anion homogeneous membrane 28 is prolonged; when the pressure pump 021 reduces the pressure in the third cavity 27, the dialysis rate of the anionic homogeneous membrane against sulfate can be increased; when the second cavity is in an open state, the dialyzed waste liquid automatically flows into the second cavity, so that the waste liquid and sulfuric acid are automatically separated.
Heating and concentrating sulfuric acid by the sulfuric acid concentrator 4; the water condensed by the condenser 6 flows into the water tank 7 by the second water pump 014, so that the water resource can be reused; the second acid-resistant pump 013 drives the sulfuric acid in the sulfuric acid collecting tank 5 to flow into the oxidation tank 1, so that the recycling of the sulfuric acid is realized.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An apparatus for removing aluminum ions from waste streams, characterized in that: comprises a diffusion dialyzer, a water tank, a pressure pump, a waste liquid storage tank and a sulfuric acid collection tank; the electrolyte of the oxidation tank flows into a diffusion dialyzer;
the diffusion dialyzer comprises a box body, wherein at least one dialysis unit tube is arranged in the box body; the box body comprises a first cavity, a second cavity and a third cavity; the second cavity and the third cavity are arranged below the first cavity;
the dialysis unit pipe comprises a main pipe and a branch pipe; the branch pipe is arranged at the middle part of the main pipe; the middle part of the branch pipe is bent, and the bending part is higher than the joint of the branch pipe and the main pipe; an anion homogeneous membrane is arranged in the main pipe; the anion homogeneous membrane is arranged below the joint of the branch pipe and the main pipe;
one end of the main pipe is communicated with the first cavity; the other end of the main pipe is communicated with the third cavity; the branch pipe is communicated with the second cavity; the third cavity is connected with a pressure pump pipeline.
2. An apparatus for removing aluminum ions from waste streams as set forth in claim 1, wherein: a feed inlet is arranged above the box body of the diffusion dialyzer; the feed inlet is funnel-shaped; the feed inlet is provided with a filter screen.
3. An apparatus for removing aluminum ions from waste streams as set forth in claim 1, wherein: a filter layer is arranged in the first cavity; the electrolyte of the oxidation tank passes through the filter layer and flows into the dialysis unit tube.
4. A device for removing aluminium ions from waste streams according to any one of claims 1 to 3, characterized in that: the first water pump drives water in the water tank to flow into the second cavity and the third cavity; and control valves are arranged on the connecting pipelines of the second cavity, the third cavity and the water tank.
5. An apparatus for removing aluminum ions from waste streams as set forth in claim 4, wherein: the third cavity is sequentially connected with the sulfuric acid concentrator and the condenser pipe through pipelines; the acid-resistant pump drives the sulfuric acid in the third cavity to flow along the pipeline connection; the condenser condenses the water vapor generated by the sulfuric acid concentrator; the condenser is communicated with the water tank through a pipeline; the second water pump drives the water in the condenser to flow back into the water tank.
6. An apparatus for removing aluminum ions from waste streams as set forth in claim 5, wherein: the sulfuric acid outlet of the sulfuric acid concentrator is sequentially connected with a sulfuric acid collecting tank and an oxidation tank through pipelines; an acid-resistant pump is arranged on a pipeline between the sulfuric acid collecting tank and the oxidation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182355.2A CN111268654B (en) | 2020-03-16 | 2020-03-16 | Device for removing aluminum ions in waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182355.2A CN111268654B (en) | 2020-03-16 | 2020-03-16 | Device for removing aluminum ions in waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111268654A CN111268654A (en) | 2020-06-12 |
| CN111268654B true CN111268654B (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010182355.2A Active CN111268654B (en) | 2020-03-16 | 2020-03-16 | Device for removing aluminum ions in waste liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN111268654B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010018939A (en) * | 1999-08-24 | 2001-03-15 | 이구택 | A wastewater treatment method by using electrodialysis method and diffusiondialysis method |
| CN102974223A (en) * | 2012-12-29 | 2013-03-20 | 山东天维膜技术有限公司 | Flat plate type dialysis device, production method thereof and dialyzer produced through adopting device |
| CN110644029A (en) * | 2019-09-19 | 2020-01-03 | 广东创伟智能科技有限公司 | Membrane separation aluminum ion recovery device and system |
| CN212374881U (en) * | 2020-03-16 | 2021-01-19 | 南京鸿发有色金属制造股份有限公司 | Device for removing aluminum ions in waste liquid |
-
2020
- 2020-03-16 CN CN202010182355.2A patent/CN111268654B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010018939A (en) * | 1999-08-24 | 2001-03-15 | 이구택 | A wastewater treatment method by using electrodialysis method and diffusiondialysis method |
| CN102974223A (en) * | 2012-12-29 | 2013-03-20 | 山东天维膜技术有限公司 | Flat plate type dialysis device, production method thereof and dialyzer produced through adopting device |
| CN110644029A (en) * | 2019-09-19 | 2020-01-03 | 广东创伟智能科技有限公司 | Membrane separation aluminum ion recovery device and system |
| CN212374881U (en) * | 2020-03-16 | 2021-01-19 | 南京鸿发有色金属制造股份有限公司 | Device for removing aluminum ions in waste liquid |
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| CN111268654A (en) | 2020-06-12 |
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