CN114522966A - Recovery system and recovery method of nickel cobalt hydroxide - Google Patents
Recovery system and recovery method of nickel cobalt hydroxide Download PDFInfo
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- CN114522966A CN114522966A CN202210103063.4A CN202210103063A CN114522966A CN 114522966 A CN114522966 A CN 114522966A CN 202210103063 A CN202210103063 A CN 202210103063A CN 114522966 A CN114522966 A CN 114522966A
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- recovery
- cobalt hydroxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a recovery system and a recovery method of nickel cobalt hydroxide, wherein the recovery system comprises a reaction kettle washing water recovery system, a centrifugal dehydration mother liquor recovery system, a recovery tank, a supernatant recovery system and a solid recovery system, a feed inlet of the recovery tank is respectively communicated with the reaction kettle washing water recovery system and the centrifugal dehydration mother liquor recovery system, a supernatant outlet is communicated with the supernatant recovery system, and a discharge outlet of the recovery tank is communicated with the solid recovery system. The recovery method disclosed by the invention has the advantages that the washing water and the dehydration mother liquor of the reaction kettle are separately recovered into the recovery tank for recovering the nickel-cobalt hydroxide, the impurity content of the nickel-cobalt hydroxide obtained by recovery is low, and the recovered nickel-cobalt hydroxide is returned to the processes of pressure filtration, washing, centrifugal dehydration, flash evaporation drying, screening for iron removal and packaging of the product, so that the final yield of the nickel-cobalt hydroxide can be improved, the energy consumption can be saved, the recovery process can be shortened, and the economic benefit can be improved.
Description
Technical Field
The invention relates to the field of hydroxide recovery in nickel cobalt hydroxide production, in particular to a recovery system and a recovery method of nickel cobalt hydroxide.
Background
The production process flow of the nickel cobalt hydroxide comprises the following steps: preparing a binary solution from a nickel sulfate solution and a cobalt sulfate solution; coprecipitation reaction of binary liquid, ammonia water and liquid alkali; thirdly, filter pressing and washing; centrifugally dewatering, flash evaporating and drying; screening, deironing and packaging. After the reaction, the reaction liquid is discharged, the nickel cobalt hydroxide with good reaction can be remained on the inner wall of the reaction kettle and the stirring paddle, the washing water for washing the reaction kettle can be transferred to the mother liquor collecting tank finally, the existing recovery process is to collect all the waste liquid in the whole production flow into the mother liquor collecting tank in a centralized manner, then the mother liquor is subjected to filter pressing by a filter press, the recovered solid matter is dissolved by sulfuric acid to obtain the regenerated liquid, and then the regenerated liquid can be used for preparing the nickel cobalt binary liquid and returning to production.
The recovery method of the waste liquid in the prior art is simple to operate, but because the recovered liquid contains many other substances besides nickel cobalt hydroxide, the solid obtained by filtering the recovered liquid cannot be used as a nickel cobalt hydroxide product, so that the solid can only be treated by an acid dissolution method, the acid dissolution needs to consume a large amount of sulfuric acid, and the solution after the acid dissolution returns to the first step of the process flow and needs to participate in the coprecipitation reaction again, so that reaction materials such as liquid alkali, ammonia water and steam are consumed, and the whole recovery process consumes a large amount of auxiliary materials and has high energy consumption.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a recovery system and a recovery method of nickel cobalt hydroxide, which specifically comprise the following steps:
the utility model provides a recovery system of nickel cobalt hydroxide, includes that reation kettle washes water recovery system, centrifugal dehydration mother liquor recovery system, accumulator, supernatant recovery system and solid recovery system, the accumulator is provided with feed inlet, supernatant export and discharge gate, and the feed inlet of accumulator communicates with reation kettle washing water recovery system, centrifugal dehydration mother liquor recovery system respectively, and the supernatant export communicates with supernatant recovery system, and the discharge gate and the solid recovery system of accumulator communicate.
Specifically, the upper part of the groove wall of the recovery groove is provided with an overflow port, and the supernatant recovery system comprises an overflow liquid receiving groove arranged below the overflow port of the recovery groove and a supernatant recovery groove communicated with the overflow liquid receiving groove.
Specifically, the reaction kettle washing water recovery system comprises a first pipeline communicated with a reaction kettle washing water outlet and a first valve arranged on the first pipeline; the centrifugal dehydration mother liquor recovery system comprises a second pipeline communicated with the liquid outlet of the centrifugal machine and a second valve arranged on the second pipeline; the first pipeline and the second pipeline are respectively communicated with the feed inlet of the recovery tank.
Specifically, the solid recovery system comprises a filter press and a drying device, wherein a feed inlet of the filter press is connected with a discharge outlet of the recovery tank, and the drying device is connected with the discharge outlet of the filter press through a conveying device.
Specifically, the drying device further comprises a screening device connected with the drying device, an iron removal device connected with the screening device, and a packaging device connected with the iron removal device.
A method for recovering nickel cobalt hydroxide comprising the steps of:
(1) recycling the washing water and the centrifugal dehydration mother liquor of the reaction kettle into a recovery tank;
(2) after standing for a period of time, outputting supernatant from the recovery tank to continuously increase the content of nickel cobalt hydroxide solids in the recovery tank along with the increase of the recovery amount of the washing water and the centrifugal dehydration mother liquor of the reaction kettle;
(3) and after the nickel cobalt hydroxide solid in the recovery tank reaches a certain amount, carrying out solid-liquid separation on the recovered liquid in the recovery tank to obtain the recovered nickel cobalt hydroxide.
Specifically, the method further comprises the step (4): and washing, centrifugally dewatering, flash drying, screening, deironing and packaging the nickel-cobalt hydroxide obtained by solid-liquid separation to obtain a finished product of the nickel-cobalt hydroxide.
Specifically, an overflow port for overflowing supernatant is arranged above the recovery tank, and when the liquid level of the recovery liquid exceeds the height of the overflow port, the supernatant in the recovery tank starts to flow out of the overflow port.
The invention has the beneficial effects that: the nickel-cobalt hydroxide recovered by the recovery system and the recovery method disclosed by the invention does not need to participate in acid dissolution, preparation and reaction, so that the consumption of reaction materials such as sulfuric acid, liquid alkali, ammonia water, steam and the like can be reduced, the recovery process is greatly shortened, and the recovery cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a nickel cobalt hydroxide recovery system disclosed herein;
FIG. 2 is a process flow diagram of the nickel cobalt hydroxide recovery method disclosed in the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments shown below do not limit the inventive content described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to the attached drawing 1, a recovery system of nickel cobalt hydroxide, including reation kettle wash water recovery system, centrifugal dehydration mother liquor recovery system, accumulator, supernatant recovery system and solid recovery system, the accumulator is provided with feed inlet, supernatant export and discharge gate, and the feed inlet of accumulator communicates with reation kettle wash water recovery system, centrifugal dehydration mother liquor recovery system respectively, and supernatant export communicates with supernatant recovery system, and the discharge gate and the solid recovery system of accumulator communicate.
In one embodiment of the invention, the solid recovery system comprises a filter press and a drying device, wherein the feeding hole of the filter press is connected with the discharging hole of the recovery tank, and the drying device is connected with the discharging hole of the filter press through a conveying device.
In one embodiment of the invention, the drying device further comprises a screening device connected with the drying device, an iron removing device connected with the screening device, and a packaging device connected with the iron removing device.
In one embodiment of the invention, an overflow port is arranged at the upper part of the wall of the recovery tank, and the supernatant recovery system comprises an overflow liquid receiving tank arranged below the overflow port of the recovery tank and a supernatant recovery tank communicated with the overflow liquid receiving tank.
In one embodiment of the invention, the reaction kettle washing water recovery system comprises a first pipeline communicated with the reaction kettle washing water outlet and a first valve arranged on the first pipeline; the centrifugal dehydration mother liquor recovery system comprises a second pipeline communicated with the liquid outlet of the centrifugal machine and a second valve arranged on the second pipeline; the first pipeline and the second pipeline are respectively communicated with the feed inlet of the recovery tank.
A method for recovering nickel cobalt hydroxide comprising the steps of:
(1) recycling the washing water and the centrifugal dehydration mother liquor of the reaction kettle into a recovery tank;
(2) after standing for a period of time, outputting supernatant from the recovery tank to continuously increase the content of nickel cobalt hydroxide solids in the recovery tank along with the increase of the recovery amount of the washing water and the centrifugal dehydration mother liquor of the reaction kettle;
(3) and after the nickel cobalt hydroxide solid in the recovery tank reaches a certain amount, carrying out solid-liquid separation on the recovered liquid in the recovery tank to obtain the recovered nickel cobalt hydroxide.
In one embodiment of the present invention, further comprising step (4): and washing, centrifugally dewatering, flash drying, screening, deironing and packaging the nickel-cobalt hydroxide obtained by solid-liquid separation to obtain a finished product of the nickel-cobalt hydroxide.
In one embodiment of the invention, an overflow port for overflowing the supernatant is arranged above the recovery tank, and when the liquid level of the recovery liquid exceeds the height of the overflow port, the supernatant in the recovery tank starts to flow out of the overflow port.
Referring to the attached figure 2, the production process flow of the nickel cobalt hydroxide is as follows: preparing a binary solution from a nickel sulfate solution and a cobalt sulfate solution; coprecipitation reaction of binary liquid, ammonia water and liquid alkali; thirdly, filter pressing and washing; centrifugally dewatering, flash evaporating and drying; screening, deironing and packaging. The method disclosed by the invention is used for independently recycling the washing water and the dehydration mother liquor of the reaction kettle into the recycling tank to recycle the nickel-cobalt hydroxide, the recycled nickel-cobalt hydroxide has low impurity content and the same quality as the nickel-cobalt hydroxide obtained after the reaction is finished, and the recycled nickel-cobalt hydroxide is returned to the processes of pressure filtration, washing, centrifugal dehydration, flash evaporation drying, screening for iron removal and packaging of the product, so that the final yield of the nickel-cobalt hydroxide can be improved, the energy consumption can be saved, the recycling process can be shortened, and the economic benefit can be improved.
Unless expressly stated or limited otherwise, the terms "disposed" and "in communication with" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a recovery system of nickel cobalt hydroxide, its characterized in that, washes water recovery system, centrifugal dehydration mother liquor recovery system, accumulator, supernatant recovery system and solid recovery system including reation kettle, the accumulator is provided with feed inlet, supernatant export and discharge gate, and the feed inlet of accumulator communicates with reation kettle washing water recovery system, centrifugal dehydration mother liquor recovery system respectively, and the supernatant export communicates with supernatant recovery system, and the discharge gate and the solid recovery system of accumulator communicate.
2. The recycling system of nickel cobalt hydroxide as set forth in claim 1, wherein an overflow port is formed at an upper portion of a wall of the recycling tank, and the supernatant recycling system includes an overflow liquid receiving tank disposed below the overflow port of the recycling tank and a supernatant recycling tank communicating with the overflow liquid receiving tank.
3. The nickel cobalt hydroxide recovery system as claimed in claim 1, wherein the reaction vessel washing water recovery system comprises a first pipe communicated with the reaction vessel washing water outlet and a first valve disposed on the first pipe; the centrifugal dehydration mother liquor recovery system comprises a second pipeline communicated with a liquid outlet of the centrifugal machine and a second valve arranged on the second pipeline; the first pipeline and the second pipeline are respectively communicated with a feed inlet of the recovery tank.
4. The recycling system of nickel cobalt hydroxide as set forth in claim 1, wherein the solids recycling system comprises a filter press and a drying device, the inlet of the filter press is connected with the outlet of the recycling tank, and the drying device is connected with the outlet of the filter press through a conveying device.
5. The recycling system of nickel cobalt hydroxide according to claim 4, further comprising a screening device connected with the drying device, an iron removing device connected with the screening device, and a packaging device connected with the iron removing device.
6. A method for recycling nickel cobalt hydroxide by using the recycling system of nickel cobalt hydroxide according to claim 1, comprising the steps of:
(1) recycling the washing water and the centrifugal dehydration mother liquor of the reaction kettle into a recovery tank;
(2) after standing for a period of time, outputting supernatant from the recovery tank to continuously increase the content of nickel cobalt hydroxide solids in the recovery tank along with the increase of the recovery amount of the washing water and the centrifugal dehydration mother liquor of the reaction kettle;
(3) and after the nickel cobalt hydroxide solid in the recovery tank reaches a certain amount, carrying out solid-liquid separation on the recovered liquid in the recovery tank to obtain the recovered nickel cobalt hydroxide.
7. The method for recycling nickel cobalt hydroxide according to claim 6, further comprising the step (4): and washing, centrifugally dewatering, flash drying, screening, deironing and packaging the nickel-cobalt hydroxide obtained by solid-liquid separation to obtain a finished product of the nickel-cobalt hydroxide.
8. The method for recovering nickel cobalt hydroxide as claimed in claim 6, wherein an overflow port for overflowing the supernatant is provided above the recovery tank, and when the liquid level of the recovery liquid exceeds the height of the overflow port, the supernatant in the recovery tank starts to flow out from the overflow port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103063.4A CN114522966A (en) | 2022-01-27 | 2022-01-27 | Recovery system and recovery method of nickel cobalt hydroxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210103063.4A CN114522966A (en) | 2022-01-27 | 2022-01-27 | Recovery system and recovery method of nickel cobalt hydroxide |
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| CN114522966A true CN114522966A (en) | 2022-05-24 |
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| CN202210103063.4A Pending CN114522966A (en) | 2022-01-27 | 2022-01-27 | Recovery system and recovery method of nickel cobalt hydroxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950005A (en) * | 2022-06-29 | 2022-08-30 | 格林爱科(荆门)新能源材料有限公司 | Recovery system and recovery method for ternary positive electrode precursor production regeneration waste liquid |
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2022
- 2022-01-27 CN CN202210103063.4A patent/CN114522966A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950005A (en) * | 2022-06-29 | 2022-08-30 | 格林爱科(荆门)新能源材料有限公司 | Recovery system and recovery method for ternary positive electrode precursor production regeneration waste liquid |
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