CN211689250U - Processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis - Google Patents
Processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis Download PDFInfo
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- CN211689250U CN211689250U CN201922483392.2U CN201922483392U CN211689250U CN 211689250 U CN211689250 U CN 211689250U CN 201922483392 U CN201922483392 U CN 201922483392U CN 211689250 U CN211689250 U CN 211689250U
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Abstract
The utility model relates to a processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis belongs to electrolysis preparation nitrogen trifluoride technical field. Device simple structure, convenient operation, the operation is stable and safe, can effectively retrieve ammonium bifluoride among the nickeliferous waste material that nitrogen trifluoride electrolysis produced and can regard as the raw materials of electrolysis preparation nitrogen trifluoride, the nickeliferous residue of retrieving detaching ammonium bifluoride can form simple substance nickel behind high temperature treatment to the realization has fine industrial application and worth to nickeliferous waste material's innocent treatment.
Description
Technical Field
The utility model relates to a processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis belongs to electrolysis preparation nitrogen trifluoride technical field.
Background
Nickel (Ni) as electrolytic method for preparing nitrogen trifluoride (NF)3) Has high electrode strength and does not produce carbon tetrafluoride (CF) which is difficult to separate4) No obvious polarization and the like; however, nickel is gradually dissolved in the electrolytic process, part of the dissolved nickel is precipitated at the cathode, and part of the dissolved nickel is deposited at the bottom of the electric cell in the form of complex, so that the electrolytic efficiency is influenced. Therefore, it is necessary to periodically clean the deposits in the electrolytic cell to maintain the electrolysis smoothly. The cleaned sediment is waste electrolyte, and the main components of the waste electrolyte are metal simple substances such as nickel, iron, copper and the like or metal fluorides, doped ammonium bifluoride and the like. The treatment and recycling of waste electrolyte is a difficult problem to be solved urgently in the industrialization process of nitrogen trifluoride.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis, the device simple structure, convenient operation, the operation is stable and safe, can realize the processing to the nickeliferous waste material that nitrogen trifluoride electrolysis produced.
The purpose of the utility model is realized through the following technical scheme.
A treatment device for nickel-containing waste materials generated in nitrogen trifluoride electrolysis comprises a melting kettle, a melting standing tank, a fluoride solution quantifying tank, a waste gas treatment system, a nitrogen gas cylinder and a fluoride solution storage tank;
a nickel-containing waste inlet, a fluoride solution inlet, a discharge port and an air outlet are arranged on the melting kettle;
the melting material standing tank is used for standing the slurry from the melting material kettle to realize solid-liquid layering;
the fluoride solution quantifying tank is provided with an air inlet, a liquid inlet, an air outlet and a liquid outlet;
the nitrogen gas bottle is used for providing pressure for the fluoride solution quantifying tank;
a fluoride solution inlet of the melting kettle is connected with a liquid outlet of the fluoride solution quantifying tank, a gas outlet of the melting kettle is connected with a waste gas treatment system, and a discharge port of the melting kettle is connected with a melting standing tank; the gas inlet of the fluoride solution quantitative tank is connected with the nitrogen gas bottle, the liquid inlet of the fluoride solution quantitative tank is connected with the fluoride solution storage tank, and the gas outlet of the fluoride solution quantitative tank is connected with the waste gas treatment system.
Furthermore, the fluoride solution quantifying tank is also provided with equipment for measuring the internal pressure and the liquid level of the fluoride solution quantifying tank, and the equipment is used for monitoring the internal pressure and the liquid level of the fluoride solution quantifying tank.
Further, the device also comprises heating equipment, wherein the heating equipment is used for heating the solid recovered from the lower layer of the melting material standing tank, so that the recovered solid (namely the nickel-containing residue) forms a nickel simple substance at high temperature; the heating equipment is also provided with an air outlet, and the air outlet of the heating equipment is connected with a waste gas treatment system.
The operation of treating nickel-containing waste produced in the electrolysis of nitrogen trifluoride with the apparatus described is as follows:
(1) adding nickel-containing waste generated in the electrolysis of nitrogen trifluoride into the melting kettle through a nickel-containing waste inlet;
(2) according to the content of the nickel-containing waste, quantitatively conveying a fluoride solution to a fluoride solution quantitative tank by a fluoride solution storage tank, and inputting nitrogen into the fluoride solution quantitative tank for conveying the fluoride solution in the fluoride solution quantitative tank into a melting kettle; if the internal pressure of the fluoride solution quantitative tank is overlarge, exhausting the gas to a waste gas treatment system through a gas outlet of the fluoride solution quantitative tank; wherein, the fluoride solution can dissolve ammonium bifluoride, and can be at least one of hydrogen fluoride solution, ammonium bifluoride solution, potassium fluoride solution and potassium bifluoride solution;
(3) after the fluoride solution and the nickel-containing waste are uniformly stirred and mixed in the melting kettle, the mixed slurry in the melting kettle enters a melting standing tank through a discharge port, and fluoride gas generated in the stirring and mixing process enters a waste gas treatment system through a gas outlet of the melting kettle;
(4) after the mixed slurry is placed and layered in a molten material standing tank, recovering an upper-layer solution in the molten material standing tank as a raw material for preparing nitrogen trifluoride by electrolysis, and recovering a lower-layer nickel-containing residue in the molten material standing tank as a raw material for preparing a nickel simple substance;
(5) and (3) putting the recovered nickel-containing residue into heating equipment, carrying out high-temperature treatment on the nickel-containing residue to form a nickel simple substance, and allowing fluoride gas formed in the high-temperature treatment process to enter a waste gas treatment system.
Has the advantages that:
device simple structure, convenient operation, the operation is stable and safe, can effectively retrieve ammonium bifluoride among the nickeliferous waste material that nitrogen trifluoride electrolysis produced and can regard as the raw materials of electrolysis preparation nitrogen trifluoride, the nickeliferous residue of retrieving detaching ammonium bifluoride can form simple substance nickel behind high temperature treatment to the realization has fine industrial application and worth to nickeliferous waste material's innocent treatment.
Drawings
FIG. 1 is a schematic diagram showing the structure of an apparatus for treating nickel-containing waste generated in the electrolysis of nitrogen trifluoride according to the present invention.
The system comprises a melting kettle 1, a melting standing tank 2, a fluoride solution quantifying tank 3, a liquid level sensor 4, a waste gas treatment system 5 and a pressure sensor 6.
Detailed Description
The invention is further described with reference to specific embodiments wherein the process is conventional unless otherwise specified and the starting materials are commercially available from a public disclosure without further specification.
Example 1
As shown in FIG. 1, the device for treating nickel-containing waste materials generated in nitrogen trifluoride electrolysis comprises a melting kettle 1, a melting standing tank 2, a fluoride solution quantifying tank 3, a waste gas treatment system 5, a nitrogen gas cylinder, a fluoride solution storage tank and a high-temperature furnace;
the melting kettle 1 is provided with a nickel-containing waste inlet, a fluoride solution inlet, a discharge port and a gas outlet, and a stirrer is also arranged inside the melting kettle 1;
the melting material standing tank 2 is used for standing the slurry from the melting material kettle 1 to realize solid-liquid layering;
the fluoride solution quantifying tank 3 is provided with an air inlet, a liquid inlet, an air outlet and a liquid outlet; the fluoride solution quantitative tank 3 is also provided with a liquid level sensor 4 and a pressure sensor 6 which are used for monitoring the liquid level and the pressure in the fluoride solution quantitative tank 3;
the nitrogen gas bottle is used for providing pressure for the fluoride solution quantifying tank 3;
the high-temperature furnace is used for carrying out high-temperature treatment on the nickel-containing residues recovered from the lower layer of the melting material standing groove 2;
a fluoride solution inlet of the melting kettle 1 is connected with a liquid outlet of the fluoride solution quantifying tank 3, a gas outlet of the melting kettle 1 is connected with a waste gas treatment system 5, and a discharge port of the melting kettle 1 is connected with the melting standing tank 2; the gas inlet of the fluoride solution quantitative tank 3 is connected with a nitrogen gas bottle, the liquid inlet of the fluoride solution quantitative tank 3 is connected with a fluoride solution storage tank, and the gas outlet of the fluoride solution quantitative tank 3 is connected with a waste gas treatment system 5;
the steps of treating nickel-containing waste generated in the electrolysis of nitrogen trifluoride by using the above-mentioned apparatus are as follows:
(1) adding nickel-containing waste generated in the electrolysis of nitrogen trifluoride into the melting kettle 1 through a nickel-containing waste inlet;
(2) according to the content of the nickel-containing waste, a fluoride solution storage tank quantitatively conveys a fluoride solution to a fluoride solution quantitative tank 3, the fluoride solution in the fluoride solution quantitative tank 3 enters a melting kettle 1 under the action of nitrogen, and the internal pressure of the fluoride solution quantitative tank 3 is controlled to be 0.1-0.15 MPa; if the internal pressure of the fluoride solution quantitative tank 3 exceeds 0.15MPa, exhausting the gas to the waste gas treatment system 5 through a gas outlet of the fluoride solution quantitative tank 3;
(3) after fully stirring and mixing the fluoride solution and the nickel-containing waste in the melting kettle 1 for 30 min-2 h, feeding the mixed slurry in the melting kettle 1 into a melting standing tank 2 through a discharge port, and feeding fluoride gas generated in the stirring and mixing process into a waste gas treatment system 5 through a gas outlet of the melting kettle 1;
(4) standing the mixed slurry in a molten material standing tank 2 for 16-24 h for layering, recovering an upper-layer solution in the molten material standing tank 2 as a raw material for preparing nitrogen trifluoride by electrolysis, and recovering a lower-layer nickel-containing residue in the molten material standing tank 2 as a raw material for preparing a nickel simple substance; in the upper layer solution in the melting material standing tank 2, the mass ratio of the hydrogen fluoride in the solution to other fluoride (not containing hydrogen fluoride) in the solution is 1 (1-5);
(5) the recovered nickel-containing residue is put into a high-temperature furnace and treated at 700-1100 ℃ to form a nickel simple substance, and fluoride gas formed in the high-temperature treatment process enters a waste gas treatment system 5.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A processing apparatus of nickel-containing waste material generated in nitrogen trifluoride electrolysis is characterized in that: the treatment device comprises a melting kettle, a melting standing tank, a fluoride solution quantifying tank, a waste gas treatment system, a nitrogen gas cylinder and a fluoride solution storage tank;
a nickel-containing waste inlet, a fluoride solution inlet, a discharge port and an air outlet are arranged on the melting kettle;
the melting material standing tank is used for standing the slurry from the melting material kettle to realize solid-liquid layering;
the fluoride solution quantifying tank is provided with an air inlet, a liquid inlet, an air outlet and a liquid outlet;
the nitrogen gas bottle is used for providing pressure for the fluoride solution quantifying tank;
the fluoride solution inlet of the melting kettle is connected with the liquid outlet of the fluoride solution quantifying tank, the gas outlet of the melting kettle is connected with the waste gas treatment system, the discharge port of the melting kettle is connected with the melting standing tank, the gas inlet of the fluoride solution quantifying tank is connected with the nitrogen gas cylinder, the liquid inlet of the fluoride solution quantifying tank is connected with the fluoride solution storage tank, and the gas outlet of the fluoride solution quantifying tank is connected with the waste gas treatment system.
2. The apparatus for treating nickel-containing waste generated in the electrolysis of nitrogen trifluoride according to claim 1, wherein: the fluoride solution quantitative tank is also provided with a device for measuring the internal pressure of the fluoride solution quantitative tank.
3. The apparatus for treating nickel-containing waste generated in the electrolysis of nitrogen trifluoride according to claim 1, wherein: the fluoride solution quantitative tank is also provided with a device for measuring the liquid level inside the fluoride solution quantitative tank.
4. The apparatus for treating nickel-containing waste generated in the electrolysis of nitrogen trifluoride according to claim 1, wherein: the processing device also comprises heating equipment, and the heating equipment is used for heating the solid recovered from the lower layer of the melting material standing groove; the heating equipment is also provided with an air outlet, and the air outlet of the heating equipment is connected with a waste gas treatment system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922483392.2U CN211689250U (en) | 2019-12-31 | 2019-12-31 | Processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis |
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| CN201922483392.2U CN211689250U (en) | 2019-12-31 | 2019-12-31 | Processing apparatus of nickeliferous waste material that produces in nitrogen trifluoride electrolysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364056A (en) * | 2019-12-31 | 2020-07-03 | 中船重工（邯郸）派瑞特种气体有限公司 | Method and apparatus for treating nickel-containing waste generated in nitrogen trifluoride electrolysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364056A (en) * | 2019-12-31 | 2020-07-03 | 中船重工（邯郸）派瑞特种气体有限公司 | Method and apparatus for treating nickel-containing waste generated in nitrogen trifluoride electrolysis |
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Address after: 057550 No. five Weir Road, chemical industry gathering area, Feixiang District, Handan, Hebei, 1 Patentee after: China shipbuilding (Handan) Perry Special Gas Co.,Ltd. Address before: No.1 Weiwu Road, chemical industry gathering area, Feixiang County, Handan City, Hebei Province Patentee before: PERIC SPECIAL GASES Co.,Ltd. |
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