CN218058514U - Precursor mother liquor processing system - Google Patents
Precursor mother liquor processing system Download PDFInfo
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- CN218058514U CN218058514U CN202222606295.XU CN202222606295U CN218058514U CN 218058514 U CN218058514 U CN 218058514U CN 202222606295 U CN202222606295 U CN 202222606295U CN 218058514 U CN218058514 U CN 218058514U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to nonferrous hydrometallurgy field discloses a precursor mother liquor processing system. The device comprises a preheating component, a falling film evaporator, a falling film separator, a forced circulation heater, a crystallization separator, a thickener, a centrifugal machine, a drying component, a packaging component and a finished product tank which are sequentially communicated; the centrifuge is provided with a liquid phase outlet and a solid phase outlet, the solid phase outlet of the centrifuge is communicated with the drying component, the liquid phase outlet of the centrifuge is communicated with a mother liquor tank, and the mother liquor tank is communicated with the crystallization separator through a mother liquor preheater; the ternary cathode material precursor mother liquor treatment system further comprises a centrifugal compressor, and the centrifugal compressor is communicated with the falling film evaporator, the falling film separator, the forced circulation heater and the crystallization separator respectively. The utility model discloses simple structure, practicality adopt centrifugal compressor to heat the steady operation of pressurization assurance system with the flash steam, when the assurance system throughput, reduced the equipment investment, reduce the running cost.
Description
Technical Field
The utility model belongs to nonferrous hydrometallurgy field relates to a precursor mother liquor processing system, and is more specific relates to a ternary cathode material precursor mother liquor processing system.
Background
The ternary anode material has important market share in the power battery industry, and the mainstream process of the ternary anode material generally adopts three elements of Ni, co and Mn to prepare a ternary precursor by coprecipitation. And 9 to 20 tons of precursor mother liquor can be generated every one ton of ternary precursor product, and the solid content in the precursor mother liquor accounts for 1 to 5 percent of the total weight.
The prior method for treating the ternary cathode precursor mother liquor mainly comprises the steps of removing heavy metal, deamination and MVR evaporation crystallization. The equipment composition of a ternary anode precursor mother liquor treatment system is complex, the energy consumption is high, the treatment cost is high, and the phenomenon of material bubbling exists in the treatment process, so that the equipment cannot be safely and stably operated.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model aims at providing a ternary cathode material precursor mother liquor processing system.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a precursor mother liquor treatment system comprises a preheating component, a falling film evaporator, a falling film separator, a forced circulation heater, a crystallization separator, a thickener, a centrifuge, a drying component, a packaging component and a finished product tank which are sequentially communicated;
the centrifuge is provided with a liquid phase outlet and a solid phase outlet, the solid phase outlet of the centrifuge is communicated with the drying component, the liquid phase outlet of the centrifuge is communicated with a mother liquor tank, and the mother liquor tank is communicated with the crystallization separator through a mother liquor preheater;
the ternary cathode material precursor mother liquor treatment system further comprises a centrifugal compressor, and the centrifugal compressor is communicated with the falling film evaporator, the falling film separator, the forced circulation heater and the crystallization separator respectively.
Preferably, a first defoaming device is arranged on a pipeline of the centrifugal compressor communicated with the falling film separator; and a second defoaming device is arranged on a pipeline communicated with the crystallization separator by the centrifugal compressor.
Preferably, the crystallization separator is an FC crystallization separator.
Preferably, the pre-heating assembly comprises a primary pre-heater and a secondary pre-heater.
Further preferably, a falling film circulating pump is arranged between the secondary preheater and the falling film evaporator; and a cyclone is arranged between the crystallization separator and the thickener.
Further preferably, the primary preheater comprises a distilled water preheater and a noncondensable gas preheater which are sequentially communicated, and the secondary preheater is a steam preheater.
Further preferably, the ternary cathode material precursor mother liquor treatment system further comprises a distilled water tank, and the forced circulation heater and the falling-film evaporator are communicated with the distilled water preheater through the distilled water tank.
Further preferably, the forced circulation heater and the falling film evaporator are communicated with a noncondensable gas preheater pipeline.
Further preferably, the ternary cathode material precursor mother liquor treatment system further comprises a cooler and a distilled water purification assembly which are sequentially communicated with the distilled water preheater.
Further preferably, the ternary cathode material precursor mother liquor treatment system further comprises an ammonia tail gas absorption assembly in communication with the non-condensable gas preheater.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The utility model discloses simple structure, practicality adopt centrifugal compressor to heat the steady operation of pressurization assurance system with the flash steam, when the assurance system throughput, reduced the equipment investment, reduce the running cost.
(2) The utility model discloses centrifugal compressor all sets up the demister on the pipeline of centrifugal compressor and falling membrane separator intercommunication, on the pipeline of centrifugal compressor and crystal separator intercommunication, avoids the material to bring the material into centrifugal compressor because of the foaming, has guaranteed centrifugal compressor's safety and stability operation.
(3) The utility model discloses a subassembly of preheating that the second grade preheats, the inside distilled water that produces of use system and noncondensable gas preheat the raw materials, and the supplementary heating of adding with outside steam, energy saving and consumption reduction, the heat energy of system carries out abundant utilization.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a ternary cathode precursor mother liquor treatment system of the present invention;
in the figure: 1-first-stage preheater, 2-second-stage preheater, 3-falling film evaporator, 4-falling film separator, 5-forced circulation heater, 6-FC crystallization separator, 7-swirler, 8-thickener, 9-centrifuge, 10-drying component, 11-packaging component, 12-finished product tank, 13-first defoaming device, 14-second defoaming device, 15-centrifugal compressor, 16-ammonia tail gas absorption component, 17-distilled water tank, 18-cooler, 19-distilled water purification component, 20-mother liquor tank, 21-mother liquor preheater.
Detailed Description
To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.
Example 1
As shown in fig. 1, the embodiment discloses a ternary cathode material precursor mother liquor treatment system, which comprises a preheating component, a falling film evaporator 3, a falling film separator 4, a forced circulation heater 5, an FC crystallization separator 6, a thickener 8, a centrifuge 9, a drying component 10, a packaging component 11 and a finished product tank 12, which are sequentially communicated; the centrifugal machine 9 is provided with a liquid phase outlet and a solid phase outlet, the solid phase outlet of the centrifugal machine 9 is communicated with the drying component 10, the liquid phase outlet of the centrifugal machine 9 is communicated with the mother liquor tank 20, and the mother liquor tank 20 is communicated with the FC crystallization separator 6 through a mother liquor preheater 21;
in this embodiment, the ternary cathode material precursor mother liquor treatment system further includes a centrifugal compressor 15, and the centrifugal compressor 15 is respectively communicated with the falling film evaporator 3, the falling film separator 4, the forced circulation heater 5, and the FC crystallization separator 6. A first defoaming device 13 is arranged on a pipeline of the centrifugal compressor 15 communicated with the membrane falling separator 4; a second defoaming device 14 is provided in a pipe connecting the centrifugal compressor 15 and the FC crystal separator 6. A falling film circulating pump is arranged between the secondary preheater 2 and the falling film evaporator 3; a cyclone 7 is arranged between the crystallization separator and the thickener 8.
In this embodiment, the preheat assembly includes a primary preheater 1 and a secondary preheater 2. The primary preheater 1 comprises a distilled water preheater and a noncondensable gas preheater which are sequentially communicated, and the secondary preheater 2 is a steam preheater. The ternary cathode material precursor mother liquor treatment system further comprises a distilled water tank 17, and the forced circulation heater 5 and the falling film evaporator 3 are communicated with the distilled water preheater through the distilled water tank 17. The forced circulation heater 5 and the falling film evaporator 3 are communicated with a noncondensable gas preheater pipeline. The ternary cathode material precursor mother liquor treatment system also comprises a cooler 18 and a distilled water purification assembly 19 which are sequentially communicated with the distilled water preheater; an ammonia tail gas absorption assembly 16 in communication with the non-condensable gas preheater.
The utility model discloses the application principle of ternary cathode material precursor mother liquor processing system as follows:
the raw materials are conveyed to a primary preheater 1 by a feed pump, the primary preheater 1 comprises a distilled water preheater and a noncondensable gas preheater which are sequentially communicated, and in the primary preheater 1, the raw materials absorb the heat of the distilled water and the noncondensable gas of a system and are heated to about 50 ℃; then enters a secondary preheater 2, the secondary preheater 2 is a steam preheater, and after being preheated by the secondary preheater 2, the raw material is heated to about 100 ℃.
A falling film circulating pump is arranged between the secondary preheater 2 and the falling film evaporator 3, materials enter the falling film evaporator 3 and the falling film separator 4 under the drive of the falling film circulating pump, heat is absorbed in the falling film evaporator 3, water is evaporated in the falling film separator 4, a sodium sulfate solution is concentrated until the solution reaches a set concentration, the solution enters the forced circulation heater 5, the concentration is continued until the set concentration is reached, then the solution is discharged to the FC crystallization separator 6, sodium sulfate solid is separated out through evaporation concentration and crystallization in the FC crystallization separator 6, and crystals are generated and grow in the FC crystallization separator 6 by controlling the supersaturation degree of the solution and other modes. When the crystals in the solution reach a certain concentration, the crystals are collected by a salt foot, are introduced into a thickener 8 for thickening, and then enter a centrifuge 9 for solid-liquid separation. The liquid phase centrifugally separated by the centrifuge 9 enters the mother liquor tank 20, then passes through the mother liquor preheater 21, is preheated, enters the crystallization evaporator to continue evaporation and crystallization, and the mother liquor tank 20 needs to be periodically drained to ensure the quality of salt.
The secondary steam evaporated by the FC crystallization separator 6 and the falling film separator 4 respectively passes through the first defoaming device 13 and the second defoaming device 14 and then enters the centrifugal compressor 15. The centrifugal compressor 15 converts the low enthalpy secondary steam into high enthalpy supersaturated steam after mechanical work, and the high enthalpy supersaturated steam is used as a heating source to enter the falling film evaporator 3 and the forced circulation heater 5 to heat materials to continuously boil the materials. The distilled water produced by the centrifugal compressor 15 is passed into a distilled water tank 17 for storage and then passed into a distilled water purification unit 19 for purification.
The forced circulation heater 5 and the falling film evaporator 3 regularly discharge non-condensable gas, and the discharged non-condensable gas is sprayed and washed by a spraying device and then enters the cooler 18 to be condensed into condensed water. The condensate water has good quality and high temperature, contains a large amount of heat energy, is conveyed to the condensate water preheater of the primary preheater 1 by a condensate water pump, exchanges heat with the material, reduces the distilled water to 50 ℃, and is discharged out of the system.
Specifically, in this embodiment:
(1) The flow direction of raw materials is as follows: primary preheating → secondary preheater 2 → falling film evaporator 3 → falling film separator 4 → forced circulation heater 5 → FC crystallization separator 6 → swirler 7 → thickener 8 → centrifuge 9.
(2) The heat source flow direction: the secondary steam of the FC crystallization separator 6 and the falling film separator 4 → the centrifugal compressor 15 → the falling film evaporator 3 and the forced circulation heater 5.
The crystallization separator and the falling-film evaporator 3 flash off secondary steam with the temperature of about 95 ℃, the secondary steam enters a centrifugal compressor 15 to be compressed, heated and pressurized to about 109 ℃, and then returns to the falling-film evaporator 3 and the forced circulation heater 5 to provide a heat source for an evaporation system, the secondary steam is recycled, almost no energy is wasted, and the purposes of energy conservation and consumption reduction are achieved.
(3) The flow direction of the condensed water is as follows: the falling film evaporator 3 and the forced circulation heater 5 → the distilled water tank 17 → the primary preheater 1 → the cooler 18 → the distilled water purification module 19.
(4) The flow direction of the non-condensable gas is as follows: after the system runs for a period of time, the accumulation of non-condensable gas in the system has a serious influence on the heat exchange effect of the falling film evaporator 3 and the forced circulation heater 5. The noncondensable gas is saturated water vapor, and the entrained air (the main component is O) 2 、N 2 And other gas components) and ammonia gas is easily generated when ammonia nitrogen in the inlet water is evaporated to cause noncondensable gas, and the noncondensable gas dilutes steam which is originally used as a heating medium and greatly influences heat transfer efficiency. The non-condensable gas is not uniformly distributed in the condensation space but is generally distributed on top of the falling film evaporator 3 and the forced circulation heater 5 according to the difference in density. A special pipeline is configured to collect non-condensable gas, the non-condensable gas enters the primary preheater 1, enters the ammonia tail gas absorption assembly 16 after heat exchange is performed on the raw material, and is discharged after treatment.
(6) Periodically discharging the concentrate: in the evaporation process, because it contains partial heavy metal, organic matter etc. to intake, the water content of intaking is lower, nevertheless after a period of evaporative concentration, carries out the enrichment, can influence the evaporation capacity and the salt quality of output, consequently can concentrate the row of concentrating to the system after a period, mother liquor jar 20 sets up special row's concentrated pipeline.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A precursor mother liquor treatment system is characterized by comprising a preheating component, a falling film evaporator, a falling film separator, a forced circulation heater, a crystallization separator, a thickener, a centrifugal machine, a drying component, a packaging component and a finished product tank which are sequentially communicated;
the centrifuge is provided with a liquid phase outlet and a solid phase outlet, the solid phase outlet of the centrifuge is communicated with the drying component, the liquid phase outlet of the centrifuge is communicated with a mother liquor tank, and the mother liquor tank is communicated with the crystallization separator through a mother liquor preheater;
the precursor mother liquor treatment system also comprises a centrifugal compressor, and the centrifugal compressor is respectively communicated with the falling film evaporator, the falling film separator, the forced circulation heater and the crystallization separator.
2. The precursor mother liquor processing system as claimed in claim 1, wherein a first defoaming device is arranged on a pipeline of the centrifugal compressor communicated with the membrane-dropping separator; and a second defoaming device is arranged on a pipeline for communicating the centrifugal compressor with the crystallization separator.
3. The precursor mother liquor processing system of claim 1, wherein said crystallization separator is an FC crystallization separator.
4. The precursor mother liquor processing system of any one of claims 1 to 3, wherein the preheating assembly comprises a primary preheater and a secondary preheater.
5. The precursor mother liquor processing system of claim 4, wherein a falling film circulation pump is disposed between the secondary preheater and the falling film evaporator; and a cyclone is arranged between the crystallization separator and the thickener.
6. The precursor mother liquor processing system of claim 4, wherein the primary preheater comprises a distilled water preheater and a non-condensable gas preheater in series communication, and the secondary preheater is a steam preheater.
7. The precursor mother liquor processing system of claim 6, further comprising a distilled water tank, wherein the forced circulation heater, the falling film evaporator are in communication with the distilled water preheater through the distilled water tank.
8. The precursor mother liquor processing system of claim 6, wherein the forced circulation heater, falling film evaporator and non-condensable gas preheater conduit are in communication.
9. The precursor mother liquor processing system of claim 6, further comprising a cooler, a distilled water purification assembly in sequential communication with the distilled water preheater.
10. The precursor mother liquor processing system of claim 6, further comprising an ammonia tail gas absorption assembly in communication with the non-condensable gas preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222606295.XU CN218058514U (en) | 2022-09-30 | 2022-09-30 | Precursor mother liquor processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222606295.XU CN218058514U (en) | 2022-09-30 | 2022-09-30 | Precursor mother liquor processing system |
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| CN218058514U true CN218058514U (en) | 2022-12-16 |
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| CN202222606295.XU Active CN218058514U (en) | 2022-09-30 | 2022-09-30 | Precursor mother liquor processing system |
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- 2022-09-30 CN CN202222606295.XU patent/CN218058514U/en active Active
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