CN219469790U - Nickel electrolysis anolyte deacidification device - Google Patents
Nickel electrolysis anolyte deacidification device Download PDFInfo
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- CN219469790U CN219469790U CN202320944107.6U CN202320944107U CN219469790U CN 219469790 U CN219469790 U CN 219469790U CN 202320944107 U CN202320944107 U CN 202320944107U CN 219469790 U CN219469790 U CN 219469790U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model relates to a nickel electrolysis anolyte deacidification device, which comprises a material liquid tank, an infusion pump, a filter and a bipolar membrane electrodialysis membrane stack; the feed liquid tank comprises an electrolyte tank, a dilute acid tank and a polar liquid tank; the infusion pump comprises an electrolyte pump, an acid pump and a polar liquid pump; the filter comprises an electrolyte filter, an acid liquid filter and an extreme liquid filter; the bipolar membrane electrodialysis membrane stack consists of a plurality of compartments, each compartment consists of an anion exchange membrane and a bipolar membrane, the anion exchange membrane and the negative membrane side of the bipolar membrane form a deacidification chamber, the anion exchange membrane and the positive membrane side of the bipolar membrane form an acid chamber, the positive membrane side of the bipolar membrane and a cathode form a cathode chamber, and the anion exchange membrane and an anode form an anode chamber. The utility model can reduce the acidity of the nickel electrolyte anode liquid without adding alkali or increasing discharged wastewater, and simultaneously recover the acid in the electrolyte anode liquid.
Description
Technical Field
The utility model belongs to the technical field of nickel smelting, and particularly relates to a nickel electrolysis anolyte deacidification device.
Background
The pressure leaching-extraction-electrodeposited nickel production line of the nickel smelting factory adopts an insoluble anode electrodepositing process to produce electrodeposited nickel, purer electrodeposited nickel is deposited on a cathode under the action of direct current, a large amount of oxygen is produced by anode reaction, and meanwhile, equivalent acid is generated, and the reaction process is as follows:
cathode process: ni (Ni) 2+ +2e - Ni, side reaction: 2H (H) + +2e - →H 2 ↑
Anode process: h 2 O-2e - →1/2O 2 ↑+2H +
The occurrence of side reactions can seriously affect the quality of electrodeposited nickel, so that the acidity of the electrolyte needs to be controlled to inhibit the occurrence of side reactions. In order to solve the problem, the electrolytic bath cathode is continuously introduced with new electrolytic deposition liquid with pH value of 2.5-3.5, the electrolytic deposition nickel product is produced by the cathode under the action of direct current, and meanwhile, part of the anode liquid produced by the anode is returned to the leaching process for proportioning, and the other part is returned to the extraction process for preparing nickel carbonate and preparing the new electrolytic deposition liquid. The generated nickel carbonate is used for adjusting the pH value of the new electro-deposition solution, and the main reactions are as follows:
sedimentation of nickel carbonate: niSO 4 +Na 2 CO 3 ＝NiCO 3 ↓+Na 2 SO 4
Acid-dissolving nickel carbonate: niCO 3 +2H + ＝Ni 2+ +H 2 O+CO 2 ↑
The technology well solves the problem of the increase of acidity of the nickel electrolysis system, but also brings the problems of larger system alkali consumption, large amount of discharged wastewater, higher production cost and large treatment difficulty of discharged wastewater.
Disclosure of Invention
The utility model aims to provide a nickel electrolysis anolyte deacidification device which adopts bipolar membrane electrodialysis technology to solve the technical problems.
The utility model provides a nickel electrolysis anolyte deacidification device, which comprises a material liquid tank, an infusion pump, a filter and a bipolar membrane electrodialysis membrane stack, wherein the material liquid tank is arranged on the material liquid tank;
the feed liquid tank comprises an electrolyte tank, a dilute acid tank and a polar liquid tank which are respectively filled with nickel electrolysis anolyte, dilute sulfuric acid and sodium sulfate solution; the electrolyte tank, the dilute acid tank and the polar liquid tank are all provided with an online thermometer and a pH meter; the electrolyte tank is provided with an electrolyte tank inlet and an electrolyte tank outlet, the dilute acid tank is provided with a dilute acid tank inlet and a dilute acid tank outlet, and the polar liquid tank is provided with a polar liquid tank inlet and a polar liquid tank outlet;
the infusion pump comprises an electrolyte pump, an acid pump and a polar liquid pump, and the infusion pump outlet is provided with a pressure gauge; the filter comprises an electrolyte filter, an acid liquid filter and an extreme liquid filter; the bipolar membrane electrodialysis membrane stack is provided with an electrolyte inlet, an acid liquid inlet, a polar liquid outlet, an acid liquid outlet and an electrolyte outlet;
the outlet of the electrolyte tank is connected with the electrolyte inlet through the electrolyte pump and the electrolyte filter in sequence; the dilute acid tank outlet is connected with the acid liquid inlet sequentially through the acid liquid pump and the acid liquid filter; the outlet of the polar liquid tank is connected with the polar liquid inlet through the polar liquid pump and the polar liquid filter in sequence; the front ends of the electrolyte inlet, the acid liquid inlet and the polar liquid inlet are respectively provided with a pressure gauge and a flowmeter;
the electrolyte outlet is connected with the electrolyte inlet, the acid liquid outlet is connected with the dilute acid tank inlet, and the polar liquid outlet is connected with the polar liquid tank inlet;
the bipolar membrane electrodialysis membrane stack consists of a plurality of compartments, each compartment consists of an anion exchange membrane and a bipolar membrane, the anion exchange membrane and the negative membrane side of the bipolar membrane form a deacidification chamber, the anion exchange membrane and the positive membrane side of the bipolar membrane form an acid chamber, the positive membrane side of the bipolar membrane and a cathode form a cathode chamber, and the anion exchange membrane and an anode form an anode chamber.
Further, the electrolyte tank, the dilute acid tank and the polar liquid tank are made of PE materials.
Further, an outlet of the material liquid tank is connected with an inlet of an infusion pump through a PVC pipeline, an outlet of the infusion pump is connected with an inlet of a filter through a PVC pipeline, and an outlet of the filter is connected with an inlet of the bipolar membrane electrodialysis membrane stack through a PVC pipeline.
Further, the filter housing is made of PVC, and the filter element is made of PP.
By means of the scheme, through the nickel electrolysis anolyte deacidification device, the acidity of the nickel electrolysis anolyte can be reduced under the condition that no alkali is added and no discharged wastewater is increased, and meanwhile, the acid in the electrolysis anolyte is recovered. The device has the advantages of simple structure, stable operation, easy control, high efficiency and environmental protection, and can be widely applied to the fields of electric nickel production and the like.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a nickel electrolysis anolyte deacidification device;
FIG. 2 is a schematic view of the electrodialysis membrane stack structure of the utility model.
Reference numerals in the drawings:
1-an electrolyte tank; 2-a dilute acid tank; 3-polar liquid tank; 4-an electrolyte pump; 5-an acid liquid pump; 6-polar liquid pump; 7-an electrolyte filter; 8-acid liquor filter; 9-an extreme liquid filter; 10-bipolar membrane electrodialysis membrane stack; 11-electrolyte inlet; 12-acid liquor inlet; 13-polar liquid inlet; 14-polar liquid outlet; 15-acid liquor outlet; 16-an electrolyte outlet; 17-polar liquid tank inlet; 18-an outlet of the polar liquid tank; 19-dilute acid tank inlet; 20-dilute acid tank outlet; 21-electrolyte tank inlet; 22-electrolyte tank outlet; 23-thermometer; 24-pH meter; 25-a flow meter; 26-a pressure gauge; 27-a cathode; 28-cathode chamber; 29-bipolar membrane; 30-deacidifying room; 31-anion exchange membrane; a 32-acid chamber; 33-anode chamber; 34-anode.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, the present embodiment provides a nickel electrolysis anolyte deacidification device, which comprises a material liquid tank, (corrosion resistant) infusion pump, a filter and a bipolar membrane electrodialysis membrane stack 10.
The feed liquid tank comprises an electrolyte tank 1, a dilute acid tank 2 and a polar liquid tank 3 which are respectively filled with nickel electrolytic anolyte, dilute sulfuric acid and sodium sulfate solution; the electrolyte tank 1, the dilute acid tank 2 and the polar liquid tank 3 are respectively provided with an online thermometer 23 and a pH meter 24; the electrolyte tank 1 is provided with an electrolyte tank inlet 21 and an electrolyte tank outlet 22, the dilute acid tank 2 is provided with a dilute acid tank inlet 19 and a dilute acid tank outlet 20, and the polar liquid tank 3 is provided with a polar liquid tank inlet 17 and a polar liquid tank outlet 18;
the infusion pump comprises an electrolyte pump 4, an acid pump 5 and a polar liquid pump 6, and the infusion pump outlet is provided with a pressure gauge; the filter comprises an electrolyte filter 7, an acid liquid filter 8 and an polar liquid filter 9; the bipolar membrane electrodialysis membrane stack 10 is provided with an electrolyte inlet 11, an acid liquid inlet 12, a polar liquid inlet 13, a polar liquid outlet 14, an acid liquid outlet 15 and an electrolyte outlet 16.
The outlet 22 of the electrolyte tank is connected with the electrolyte inlet 11 through the electrolyte pump 4 and the electrolyte filter 7 in sequence; the dilute acid tank outlet 20 is connected with the acid liquid inlet 12 through the acid liquid pump 5 and the acid liquid filter 8 in sequence; the outlet 18 of the polar liquid tank is connected with the polar liquid inlet 13 through the polar liquid pump 6 and the polar liquid filter 9 in sequence; a filter arranged on a pipeline between the infusion pump and the bipolar membrane electrodialysis membrane stack is used for filtering impurities in the feed liquid; the front ends of the electrolyte inlet 11, the acid liquid inlet 12 and the polar liquid inlet 13 are respectively provided with a pressure gauge 26 and a flowmeter 25 before the membrane.
The electrolyte outlet 16 is connected with the electrolyte tank inlet 21, the acid liquid outlet 15 is connected with the dilute acid tank inlet 1, and the polar liquid outlet 14 is connected with the polar liquid tank inlet 17;
the bipolar membrane electrodialysis membrane stack consists of a plurality of compartments, each compartment consists of an anion exchange membrane 31 and a bipolar membrane 29, the anion exchange membrane 31 and the negative membrane side of the bipolar membrane 29 form a deacidification chamber 30, the anion exchange membrane 31 and the positive membrane side of the bipolar membrane 29 form an acid chamber 32, the positive membrane side of the bipolar membrane 29 and the cathode 27 form a cathode chamber 28, and the anion exchange membrane 31 and the anode 34 form an anode chamber 33. Under the action of the electric field, sulfate ions in the deacidification chamber solution migrate to the anode 34 direction through the anion exchange membrane 31 and enter the acid chamber 32, and are combined with hydrogen ions generated by the hydrolysis of the bipolar membrane 29 in the acid chamber 32 to generate sulfuric acid. Meanwhile, the hydrogen ions in the solution in the deacidification chamber 30 are continuously subjected to neutralization reaction with hydroxyl ions generated by the hydrolysis of the bipolar membrane, so that the concentration of the hydrogen ions in the solution in the deacidification chamber is continuously reduced. By repeated cycling, the bipolar membrane electrodialysis stack 10 can effectively remove the acid from the nickel electrolyte anolyte.
In the present embodiment, the electrolytic solution tank 1, the dilute acid tank 2, and the polar liquid tank 3 are made of PE materials.
In this embodiment, the outlet of the stock solution tank is connected to the inlet of the infusion pump via a PVC line, the outlet of the infusion pump is connected to the inlet of the filter via a PVC line, and the outlet of the filter is connected to the inlet of the bipolar membrane electrodialysis membrane stack 10 via a PVC line.
In this embodiment, the filter housing is made of PVC, and the filter element is made of PP.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims (4)
1. The nickel electrolysis anolyte deacidification device is characterized by comprising a material liquid tank, an infusion pump, a filter and a bipolar membrane electrodialysis membrane stack (10);
the feed liquid tank comprises an electrolyte tank (1), a dilute acid tank (2) and a polar liquid tank (3) which are respectively filled with nickel electrolysis anolyte, dilute sulfuric acid and sodium sulfate solution; the electrolyte tank (1), the dilute acid tank (2) and the polar liquid tank (3) are respectively provided with an online thermometer (23) and a pH meter (24); the electrolyte tank (1) is provided with an electrolyte tank inlet (21) and an electrolyte tank outlet (22), the dilute acid tank (2) is provided with a dilute acid tank inlet (19) and a dilute acid tank outlet (20), and the polar liquid tank (3) is provided with a polar liquid tank inlet (17) and a polar liquid tank outlet (18);
the infusion pump comprises an electrolyte pump (4), an acid pump (5) and a polar liquid pump (6), and the infusion pump is provided with a pressure gauge; the filter comprises an electrolyte filter (7), an acid liquid filter (8) and an polar liquid filter (9); the bipolar membrane electrodialysis membrane stack (10) is provided with an electrolyte inlet (11), an acid liquid inlet (12), a polar liquid inlet (13), a polar liquid outlet (14), an acid liquid outlet (15) and an electrolyte outlet (16);
the outlet (22) of the electrolyte tank is connected with the electrolyte inlet (11) through the electrolyte pump (4) and the electrolyte filter (7) in sequence; the dilute acid tank outlet (20) is connected with the acid liquid inlet (12) through the acid liquid pump (5) and the acid liquid filter (8) in sequence; the outlet (18) of the polar liquid tank is connected with the polar liquid inlet (13) through the polar liquid pump (6) and the polar liquid filter (9) in sequence; the front ends of the electrolyte inlet (11), the acid liquid inlet (12) and the polar liquid inlet (13) are respectively provided with a pressure gauge (26) and a flowmeter (25);
the electrolyte outlet (16) is connected with the electrolyte tank inlet (21), the acid liquid outlet (15) is connected with the dilute acid tank inlet (19), and the polar liquid outlet (14) is connected with the polar liquid tank inlet (17);
the bipolar membrane electrodialysis membrane stack consists of a plurality of compartments, each compartment consists of an anion exchange membrane (31) and a bipolar membrane (29), the anion exchange membrane (31) and the negative membrane side of the bipolar membrane (29) form a deacidification chamber (30), the anion exchange membrane (31) and the positive membrane side of the bipolar membrane (29) form an acid chamber (32), the positive membrane side of the bipolar membrane (29) and a cathode (27) form a cathode chamber (28), and the anion exchange membrane (31) and an anode (34) form an anode chamber (33).
2. The nickel electrolysis anolyte deacidification device according to claim 1, wherein the electrolyte tank (1), the dilute acid tank (2) and the polar liquid tank (3) are made of PE materials.
3. The nickel electrolysis anolyte deacidification device according to claim 1, wherein the outlet of the feed liquid tank is connected with the inlet of an infusion pump through a PVC pipe, the outlet of the infusion pump is connected with the inlet of a filter through a PVC pipe, and the outlet of the filter is connected with the inlet of the bipolar membrane electrodialysis membrane stack (10) through a PVC pipe.
4. The nickel electrolysis anolyte deacidification device of claim 1, wherein the filter housing is PVC material and the filter element is PP material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320944107.6U CN219469790U (en) | 2023-04-24 | 2023-04-24 | Nickel electrolysis anolyte deacidification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320944107.6U CN219469790U (en) | 2023-04-24 | 2023-04-24 | Nickel electrolysis anolyte deacidification device |
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| Publication Number | Publication Date |
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| CN219469790U true CN219469790U (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320944107.6U Active CN219469790U (en) | 2023-04-24 | 2023-04-24 | Nickel electrolysis anolyte deacidification device |
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| CN (1) | CN219469790U (en) |
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- 2023-04-24 CN CN202320944107.6U patent/CN219469790U/en active Active
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