CN110665438A - Feeding conveying assembly and feeding system for synthesizing lithium ion battery anode precursor - Google Patents
Feeding conveying assembly and feeding system for synthesizing lithium ion battery anode precursor Download PDFInfo
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- CN110665438A CN110665438A CN201911008077.2A CN201911008077A CN110665438A CN 110665438 A CN110665438 A CN 110665438A CN 201911008077 A CN201911008077 A CN 201911008077A CN 110665438 A CN110665438 A CN 110665438A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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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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- 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
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Abstract
The invention discloses a feeding conveying assembly, which comprises a pressure stabilizing groove, a pump inlet pipeline, a dosing pump, a pump outlet pipeline, a back pressure valve and an electromagnetic flowmeter, wherein the pressure stabilizing groove is used for storing feed liquid with constant liquid level; one end of the pump inlet pipeline is communicated with the pressure stabilizing groove, and the other end of the pump inlet pipeline is communicated with an inlet of the quantitative pump; one end of the pump outlet pipeline is communicated with the outlet of the quantitative pump, and the other end of the pump outlet pipeline is a feed liquid output end; the back pressure valve and the electromagnetic flowmeter are arranged on an outlet pipeline of the pump; an electromagnetic flow meter is located downstream of the backpressure valve. The feeding conveying assembly can improve the stability of feeding and has high economical efficiency. The invention also discloses a feeding system for synthesizing the lithium ion battery anode precursor, which comprises a synthesis kettle and a plurality of feeding conveying assemblies connected with the synthesis kettle, wherein the plurality of feeding conveying assemblies are respectively used for conveying various feed liquids required by synthesis of the lithium ion battery anode precursor. The system is safe to use and can improve various electrochemical performances of the finished battery.
Description
Technical Field
The invention relates to the technical field of synthesis feeding, in particular to a feeding conveying assembly and a feeding system for synthesis of a lithium ion battery anode precursor.
Background
The nickel-cobalt-manganese ternary positive electrode material is a novel lithium ion battery positive electrode material, has the advantages of high capacity, good thermal stability, low price and the like, can be widely applied to small lithium batteries and lithium ion power batteries, is a product very close to lithium cobaltate, has the cost performance far higher than that of the lithium cobaltate, has the capacity 10-20% higher than that of the lithium cobaltate, is one of novel battery materials most likely to replace the lithium cobaltate, is called as a third-generation lithium ion battery positive electrode material, and gradually replaces the lithium cobaltate at the annual growth rate of 20% in the domestic demand of the positive electrode material. The high-nickel ternary cathode material has a wide development prospect, and can gradually replace most of lithium cobaltate market fields along with the improvement of compaction and safety, such as electric tools, tablet computers, mobile power supplies, mobile phones and the like. Along with the breakthrough of the manufacturing process of domestic battery enterprises and the bottleneck of high-nickel ternary materials, part of battery factories have realized the industrialized application of high-nickel ternary power batteries. Lithium nickel cobalt aluminate and lithium nickel cobalt manganese oxide belong to high nickel materials, and have higher requirements on the stability of feeding liquid in each stage of precursor synthesis along with the increase of nickel content and product consistency. The stability of the feed system determines the stability of precursor production, which in turn is strongly linked to the various electrochemical properties of the finished cell and the safety of the equipment in which the cell is used.
Liquid supply pumps of the core part of a feeding system in the production of the ternary lithium ion battery anode precursor in China are generally divided into a mechanical diaphragm metering pump, a hydraulic diaphragm metering pump and a peristaltic pump. The precision of the mechanical diaphragm metering pump is +/-2% and the precision of the hydraulic diaphragm metering pump and the peristaltic pump is +/-1% in terms of different pump types. The storage tank before the pump is provided with a constant liquid level surge tank according to the matching requirements of part manufacturers so as to maintain the stability of the liquid supply pressure before the pump. And after the pump, corresponding flow meters and other pipeline accessories are configured according to the understanding of the working conditions of each factory. The feeding system for synthesizing the ternary precursor belongs to a non-standard product, and the defects of using the feeding system at present are not overcome by a large amount of industrial application, so that the planned manufacturing of the high-nickel precursor is influenced.
Most domestic enterprises do not set a front constant flow groove of a pump, so that the feeding pressure of a subsequent pumping system is always in a fluctuation state, the stability of pumped fluid is influenced, and the instability of liquid supply of the feeding system is caused. Some enterprises select a diaphragm metering pump but do not configure a buffer tank with enough volume, so that unstable pulses of pumped fluid are large, and ternary synthesis reaction is not facilitated. Although the matching combination of the hydraulic diaphragm metering pump and the mass flow meter in the liquid supply system can effectively improve the liquid supply precision, the equipment cost is higher, and the large-scale application of the liquid supply system is limited to a certain extent. In part of factories, peristaltic pumps are used for supplying liquid for the ternary synthesis system under the working condition, but the peristaltic pumps have the risks of inaccurate quantification after hoses are damaged and the liquid is polluted by foreign matters. Most of the plants do not adopt the pump and various accessories and pipelines of the ternary synthesis feeding system, and do not form a standardized product, which is not beneficial to the scale application and production organization management of high-quality ternary projects.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a feed delivery assembly capable of improving the stability of the pressure and flow rate of the feed liquid, thereby improving the stability of the feeding.
A feed conveyor assembly according to an embodiment of the first aspect of the invention comprises:
the pressure stabilizing tank is used for storing feed liquid with constant liquid level;
one end of the pump inlet pipeline is communicated with the pressure stabilizing groove;
the other end of the pump inlet pipeline is communicated with the inlet of the fixed displacement pump;
one end of the pump outlet pipeline is communicated with the outlet of the dosing pump, and the other end of the pump outlet pipeline is a feed liquid output end;
the back pressure valve is arranged on the pump outlet pipeline;
an electromagnetic flow meter disposed on the pump outlet line and downstream of the back pressure valve.
According to the feeding conveying system of the embodiment of the first aspect of the invention, the working process is as follows: the feed liquid is conveyed into a pressure stabilizing groove and stored, when the pressure of the feed liquid discharged from the pressure stabilizing groove meets the production requirement, the feed liquid is always stabilized at the constant liquid level, the feed liquid with stable pressure flows out of the pressure stabilizing groove and is conveyed to the feed liquid output end through a pump inlet pipeline, a dosing pump and a pump outlet pipeline in sequence, and the feed liquid passes through a back pressure valve and an electromagnetic flowmeter in sequence when passing through a pump outlet pipeline.
According to the feeding and conveying system provided by the embodiment of the first aspect of the invention, the pressure of the conveyed material liquid is always maintained in a stable state through the pressure stabilizing groove, the material liquid with stable pressure output by the pressure stabilizing groove is conveyed into the quantitative pump through the pump inlet pipeline, the pressure of the material liquid before entering the quantitative pump is prevented from fluctuating, the flow of the material liquid discharged by the quantitative pump is stabilized by the quantitative pump, the required pressure in the conveying process is maintained by the back pressure valve, and the stability of the flow of the material liquid output by the quantitative pump is ensured. In summary, the feeding and conveying assembly according to the embodiment of the first aspect of the present invention can improve the stability of the pressure and the flow rate of the feed liquid, thereby improving the stability of feeding.
According to one embodiment of the first aspect of the invention, a notch is arranged on the side wall of the pressure stabilizing groove and close to the bottom of the pressure stabilizing groove, and a notch valve is arranged on the notch to open and close the notch; one end of the pump inlet pipeline is connected with the notch valve.
In accordance with a further embodiment of the first aspect of the present invention, the pump further comprises a filter disposed on the pump inlet line adjacent to the slot valve.
According to an embodiment of the first aspect of the invention, the fixed displacement pump is a mechanical diaphragm fixed displacement pump.
According to a further embodiment of the first aspect of the present invention, the diaphragm of the mechanical diaphragm fixed displacement pump is a double-layer diaphragm, each of the double-layer diaphragm is connected to an alarm device, so that when any one of the double-layer diaphragm is damaged, the alarm device sends out a warning message.
According to an embodiment of the first aspect of the present invention, the pump inlet line is a rigid pipe made of PPH or CPVC; the pump outlet pipeline is a hard pipe made of PPH material or CPVC material.
In some embodiments according to the first aspect of the present invention, the pump further comprises a buffer tank connected to the pump outlet line and adjacent to the outlet of the fixed displacement pump.
According to a further embodiment of the first aspect of the present invention, the apparatus further comprises an evacuation pipe, one end of the evacuation pipe is located between the buffer tank and the back pressure valve and is connected to the pump outlet pipeline, and the other end of the evacuation pipe is an evacuation end; and a first outlet valve is arranged on the emptying pipe.
According to a still further embodiment of the first aspect of the present invention, a second outlet valve is provided on the pump outlet line, the second outlet valve being located between a connection between one end of the evacuation pipe and the pump outlet line and the back pressure valve.
According to one embodiment of the first aspect of the present invention, the pump outlet line comprises a reducing pipe section, the reducing pipe section is located between the back pressure valve and the electromagnetic flow meter, and the inner diameter of the reducing pipe section gradually decreases from upstream to downstream.
According to a further embodiment of the first aspect of the present invention, a rotameter is disposed on the pump outlet pipeline, and the rotameter is located between the back pressure valve and the reducing pipe section.
The invention also provides a feeding system for synthesizing the lithium ion battery anode precursor.
The feeding system for the synthesis of the lithium ion battery positive electrode precursor according to the embodiment of the second aspect of the invention comprises
A synthesis kettle;
the plurality of feeding conveying assemblies are used for conveying a plurality of kinds of material liquids required by synthesis of lithium ion battery anode precursors, and the material liquid output ends of the plurality of feeding conveying assemblies are connected with the synthesis kettle respectively.
According to the feeding system for synthesizing the lithium ion battery anode precursor, the plurality of feeding conveying assemblies are respectively used for conveying a plurality of kinds of feed liquid required by synthesis of the lithium ion battery anode precursor, feeding is stable, economy is high, the number of the feeding conveying assemblies is determined by actual conditions, the feed liquid output ends of the plurality of feeding conveying assemblies are respectively connected with the synthesis kettle, and the plurality of kinds of feed liquid required by synthesis of the lithium ion battery anode precursor enters the synthesis kettle according to the proportion required by the process for synthesis reaction. In conclusion, the feeding system synthesized by the positive electrode precursor of the lithium ion battery in the embodiment of the second aspect of the invention has stable feeding and high economical efficiency, and improves various electrochemical performances of finished batteries and the safety of battery equipment.
According to one embodiment of the second aspect of the invention, the device further comprises a support, and a plurality of the feeding conveying assemblies are orderly and fixedly supported on the support to form a prying device.
According to a further embodiment of the second aspect of the present invention, the apparatus further comprises a meter control device, the meter control device comprises a first control element for controlling the start and stop of the fixed displacement pump, a second control element for controlling the variable frequency regulation of the fixed displacement pump, and a third control element for controlling the electromagnetic flow meter, and the first control element, the second control element, and the third control element are integrated in a meter box.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a feed conveyor assembly according to an embodiment of the first aspect of the present invention.
Fig. 2 is a schematic structural diagram of a feeding system for positive electrode precursor synthesis of a lithium ion battery in an embodiment of the second aspect of the invention.
Reference numerals:
Feed conveying assembly 101 for conveying nickel cobalt manganese sulfate feed liquid
Feed delivery assembly 102 for delivering mixed liquor of sodium hydroxide and sodium metaaluminate
Feed delivery assembly 103 for delivering an alkali-containing sodium sulfate feed solution
Feed delivery assembly 104 for delivering an ammonia feed solution
Feed conveyor assembly 105 for conveying mixed liquor of sodium hydroxide and ammonia
Emptying pipe 9
Reducing pipe 14
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A feed conveyor assembly 1 according to an embodiment of the first aspect of the invention is described below with reference to fig. 1 to 2.
As shown in fig. 1 to 2, a feed conveying assembly 1 according to an embodiment of the first aspect of the present invention includes a pressure stabilizing tank 2, a pump inlet pipeline 3, a fixed displacement pump 6, a pump outlet pipeline 7, a backpressure valve 12 and an electromagnetic flow meter 15, wherein the pressure stabilizing tank 2 is used for storing feed liquid at a constant level; one end of the pump inlet pipeline 3 is communicated with the pressure stabilizing groove 2; the fixed displacement pump 6 comprises an inlet and an outlet, and the other end of the pump inlet pipeline 3 is communicated with the inlet of the fixed displacement pump 6; one end of the pump outlet pipeline 7 is communicated with the outlet of the fixed displacement pump 6, and the other end of the pump outlet pipeline 7 is a feed liquid output end 701; a back pressure valve 12 is arranged on the pump outlet pipeline 7; an electromagnetic flow meter 15 is provided on the pump outlet line 7 downstream of the back pressure valve 12.
Specifically, the pressure stabilizing groove 2 is used for storing the feed liquid at a constant liquid level, and it can be understood that the feed liquid is at the constant liquid level in the pressure stabilizing groove 2, so that the pressure of the feed liquid conveyed out through the pressure stabilizing groove 2 is always maintained in a stable state.
One end of the pump inlet pipeline 3 is communicated with the pressure stabilizing groove 2; the fixed displacement pump 6 comprises an inlet and an outlet, the other end of the pump inlet pipeline 3 is communicated with the inlet of the fixed displacement pump 6, and it can be understood that the fixed displacement pump 6 can stabilize the flow of the feed liquid discharged by the fixed displacement pump 6 when the feed liquid pressure in front of the pump fluctuates, and the stability of the feed liquid pressure in the subsequent feeding process is improved; the pump inlet pipeline 3 is used for conveying the feed liquid with stable pressure output by the pressure stabilizing groove 2 into the constant delivery pump 6, and the pump inlet pipeline 3 can avoid the situation that the pressure of the feed liquid generates fluctuation change before the feed liquid enters the constant delivery pump 6 to influence the stability of the flow of the feed liquid output by the constant delivery pump 6, so that the stability of the whole feeding process is improved.
One end of the pump outlet pipeline 7 is communicated with the outlet of the fixed displacement pump 6, and the other end of the pump outlet pipeline 7 is a feed liquid output end 701; backpressure valve 12 sets up on pump outlet pipeline 7, it can be understood that, pump outlet pipeline 7 carries the stable feed liquid of flow of dosing pump 6 output to feed liquid output 701, backpressure valve 12 on pump outlet pipeline 7 is used for keeping the required pressure of pipeline, guarantee the stability of dosing pump 6 output feed liquid flow, manometer 1201 has been placed to backpressure valve 12 inside, be used for the real-time pressure before confirming backpressure valve 12, backpressure valve 12 adopts and makes the socket joint be connected with pump outlet pipeline 7, and backpressure valve 12 can regard as the relief valve to use.
The electromagnetic flowmeter 15 is arranged on the pump outlet pipeline 7 and is positioned at the downstream of the back pressure valve 12, and it can be understood that the electromagnetic flowmeter 15 is connected with the pump outlet pipeline 7 by a flange, and the electromagnetic flowmeter can detect whether the flow of the feed liquid passing through the back pressure valve 12 meets the requirement of liquid supply under the condition of not influencing the stability of feeding.
According to the feeding conveying system of the embodiment of the first aspect of the invention, the working process is as follows: the feed liquid is conveyed into a pressure stabilizing groove 2 and stored, when the pressure of the feed liquid discharged from the pressure stabilizing groove 2 meets the production requirement, the feed liquid is always stabilized at the constant liquid level, the feed liquid with stable pressure flows out of the pressure stabilizing groove 2 and is conveyed to a feed liquid output end 701 through a pump inlet pipeline 3, a dosing pump 6 and a pump outlet pipeline 7 in sequence, and the feed liquid passes through a backpressure valve 12 and an electromagnetic flowmeter 15 in sequence when passing through the pump outlet pipeline 7.
According to the feeding and conveying system in the embodiment of the first aspect of the invention, the pressure of the conveyed material liquid is always maintained in a stable state through the pressure stabilizing groove 2, the pressure-stabilized material liquid output by the pressure stabilizing groove 2 is conveyed into the quantitative pump 6 through the pump inlet pipeline 3, the pressure fluctuation of the material liquid before entering the quantitative pump 6 is avoided, the quantitative pump 6 can stabilize the flow of the material liquid discharged by the quantitative pump 6, the stability of the material liquid pressure in the subsequent feeding process is improved, the back pressure valve 12 maintains the required pressure in the conveying process, and the stability of the material liquid flow output by the quantitative pump 6 is ensured. In summary, the feed conveying assembly 1 according to the embodiment of the first aspect of the present invention can improve the stability of the pressure and the flow rate of the feed liquid, thereby improving the stability of the feeding.
According to one embodiment of the first aspect of the invention, a notch is arranged on the side wall of the pressure stabilizing groove 2 and close to the bottom of the pressure stabilizing groove 2, and a notch valve 4 is arranged on the notch to open and close the notch; one end of the pump inlet line 3 is connected to the notch valve 4. It can be understood that notch valve 4 is closed, and the feed liquid is at the inside storage of pressure stabilizing tank 2, and when feed liquid pressure accords with the production requirement, notch valve 4 is opened, and feed liquid flows into pump inlet pipeline 3, and the notch setting is in pressure stabilizing tank 2 bottom for the feed liquid pressure that flows out can reach the production requirement fast, reduces pressure stabilizing tank 2's volume.
According to a further embodiment of the first aspect of the invention, a filter 5 is included, the filter 5 being arranged in the pump inlet line 3 adjacent to the slot valve 4. It can be understood that the feed liquid passes through the filter 5 on the pump inlet pipeline 3, and the filter 5 can prevent impurities in the feed liquid from entering the pump inlet pipeline 3, the fixed displacement pump 6 or other components to cause blockage, so that feeding is affected.
According to an embodiment of the first aspect of the invention, the dosing pump 6 is a mechanical diaphragm dosing pump 6. Therefore, the equipment cost can be reduced, and the economy is good.
According to a further embodiment of the first aspect of the present invention, the diaphragm of the mechanical diaphragm dosing pump 6 is a double-layer diaphragm, each of the double-layer diaphragm being connected to an alarm device, such that the alarm device gives a warning message when any one of the double-layer diaphragm is broken. From this, guaranteed the precision of mechanical diaphragm measuring pump, avoided the damaged back mechanical diaphragm measuring pump ration inaccurate and foreign matter pollution feed liquid of unilateral diaphragm rupture, alarm device can report to the police when arbitrary one deck diaphragm breaks in the double-deck diaphragm to make things convenient for the staff in time to maintain, improved the stability of feeding transport component 1 feed.
According to one embodiment of the first aspect of the invention, the pump inlet line 3 is a rigid pipe of PPH material or CPVC material; the pump outlet pipeline 7 is a hard pipe made of PPH material or CPVC material. It can be understood that the hard pipe made of the PPH material and the CPVC material can prevent foreign matters from being generated inside the pipe, blocking the pump inlet pipeline 3, the pump outlet pipeline 7 or other parts of the feeding conveying assembly 1 and influencing feeding.
According to some embodiments of the first aspect of the present invention, further comprising a buffer tank 8, the buffer tank 8 being connected to the pump outlet line 7 and adjacent to the outlet of the dosing pump 6. It can be understood that when the feed liquid passes through the buffer tank 8, the air can be compressed because the air is stored in the buffer tank 8, so that unstable pulses of the feed liquid can be reduced, and the stability of the feeding conveying assembly 1 is improved.
Note that the effective volume of the buffer tank 8 is not less than the total volume of the rated maximum flow rate 30s of the fixed displacement pump 6.
According to a further embodiment of the first aspect of the present invention, the pump further comprises an evacuation pipe 9, one end of the evacuation pipe 9 is located between the buffer tank 8 and the backpressure valve 12 and is connected with the pump outlet pipeline 7, and the other end of the evacuation pipe 9 is an evacuation end; the emptying pipe 9 is provided with a first outlet valve 10. It will be appreciated that the first outlet valve 10 is adapted to be socket-connected to the drain pipe 9, and that in the event of a need to drain residual feed liquid from the feed transfer passage or to check the flow rate of feed liquid, the first outlet valve 10 is opened to allow the feed liquid to be discharged through the drain pipe 9 and the first outlet valve 10 in sequence.
According to a still further embodiment of the first aspect of the invention, a second outlet valve 11 is provided on the pump outlet line 7, the second outlet valve 11 being located between the backpressure valve 12 and the junction between one end of the dump tube 9 and the pump outlet line 7. It will be appreciated that the second outlet valve 11 is connected by a socket to the pump outlet line 7, the first outlet valve 10 being open when the flow of feed liquid is verified, the second outlet valve 11 being closed, the first outlet valve 10 being closed and the second outlet valve 11 being open after verification.
According to one embodiment of the first aspect of the invention, the pump outlet line 7 comprises a variable diameter section located between the back pressure valve 12 and the electromagnetic flowmeter 15, and the internal diameter of the variable diameter section gradually decreases from upstream to downstream. It will be appreciated that a variable diameter pipe 14 is provided between the back pressure valve 12 and the electromagnetic flow meter 15 to control the flow rate of the feed liquid to meet the accurate measurement range of the electromagnetic flow meter 15.
According to a further embodiment of the first aspect of the invention, a rotameter 13 is arranged on the pump outlet line 7, the rotameter 13 being located between the back pressure valve 12 and the reducing pipe section. It will be appreciated that the rotameter 13 in combination with the electromagnetic flowmeter 15 to sense flow within the feed delivery assembly 1 is more convenient in a machine-physically-visible type of inspection.
It should be noted that, the rotameter 13 is connected with the pump outlet pipeline 7 by adopting a socket joint, the full flow passage component of the rotameter 13 is made of a non-metal material, and the electromagnetic flowmeter 15 is connected on the pump outlet pipeline 7 by adopting a flange.
The second aspect of the present invention also provides a feeding system 1000 for the synthesis of a lithium ion battery positive electrode precursor.
The feeding system 1000 for the synthesis of the lithium ion battery positive electrode precursor according to the embodiment of the second aspect of the invention comprises a synthesis kettle 16;
the plurality of feeding conveying assemblies 1 of any one of the first aspect of the present invention are respectively used for conveying a plurality of kinds of material liquids required for synthesizing the lithium ion battery anode precursor, and the material liquid output ends 701 of the plurality of feeding conveying assemblies 1 are respectively connected with the synthesis kettle 16. It should be noted that the various feed liquids required for synthesizing the lithium ion battery anode precursor can include a nickel-cobalt-manganese sulfate feed liquid, an alkali-containing sodium sulfate feed liquid, an ammonia feed liquid and a mixed feed liquid of sodium hydroxide and sodium metaaluminate; or the multiple feed liquids required by the synthesis of the lithium ion battery anode precursor can comprise a nickel-cobalt-manganese sulfate feed liquid, an alkali-containing sodium sulfate feed liquid, an ammonia water feed liquid and a mixed feed liquid of sodium hydroxide and ammonia water.
According to the feeding system 1000 for synthesizing the lithium ion battery anode precursor, the plurality of feeding conveying assemblies 1 are respectively used for conveying a plurality of kinds of feed liquid required by synthesizing the lithium ion battery anode precursor, the feeding is stable, the economy is high, the number of the feeding conveying assemblies 1 is determined by actual conditions, the feed liquid output ends 701 of the plurality of feeding conveying assemblies 1 are respectively connected with the synthesis kettle 16, and the plurality of kinds of feed liquid required by synthesizing the lithium ion battery anode precursor enters the synthesis kettle 16 according to the proportion required by the process for synthesis reaction. In summary, the feeding system 1000 for the synthesis of the lithium ion battery positive electrode precursor in the embodiment of the second aspect of the invention has stable feeding and high economical efficiency, and improves various electrochemical performances of the finished battery and the safety of the battery equipment.
As shown in fig. 2, according to an embodiment of the second aspect of the present invention, the apparatus further comprises a support 17, and a plurality of feed material conveying assemblies 1 are orderly and fixedly supported on the support 17 to form a prying device. It can be understood that a plurality of feeding conveying systems are orderly fixed on the stainless steel bracket 17, the prying equipment is convenient to move, and the equipment forms a standardized product, so that the scale application and the production organization management are facilitated.
The material of the holder 17 is determined by actual conditions and is not limited to the stainless steel holder 17.
As shown in fig. 1 and 2, according to a further embodiment of the second aspect of the present invention, the present invention further comprises an instrument control device 18, wherein the instrument control device 18 comprises a first control element for controlling the start and stop of the fixed displacement pump 6, a second control element for controlling the variable frequency regulation of the fixed displacement pump 6, and a third control element for controlling the electromagnetic flow meter 15, and the first control element, the second control element, and the third control element are integrated in an instrument box. It can be understood that the instrument box can be hung on the bracket 17, and the instrument control device 18 can perform start-stop control or variable frequency adjustment on the feeding conveying assembly 1, so as to improve the feeding stability of the feeding system 1000 for synthesizing the lithium ion battery anode precursor.
As shown in fig. 1 and fig. 2, a feeding system for synthesizing a positive electrode precursor of a lithium ion battery according to a second aspect of the present invention is described below as a specific example.
The feeding system comprises six feeding conveying assemblies 1 and a synthesis kettle 16 which are of the same structure, wherein two feeding conveying assemblies are used for conveying nickel-cobalt-manganese sulfate feed liquid, two feeding conveying assemblies are used for conveying mixed feed liquid of sodium hydroxide and sodium metaaluminate or mixed feed liquid of sodium hydroxide and ammonia water, one feeding conveying assembly is used for conveying alkali-containing sodium sulfate feed liquid, the other feeding conveying assembly is used for conveying ammonia water feed liquid, and feed liquid output ends 701 of the six feeding conveying assemblies 1 are respectively connected with the synthesis kettle 16.
The feeding and conveying assembly 1 comprises a pressure stabilizing groove 2, a pump inlet pipeline 3, a notch valve 4, a filter 5, a fixed displacement pump 6, a pump outlet pipeline 7, a buffer tank 8, an emptying pipe 9, a first outlet valve 10, a second outlet valve 11, a backpressure valve 12, a rotor flow meter 13, a reducing pipeline 14 and an electromagnetic flow meter 15; wherein the one end of pump inlet pipeline 3 is connected with filter 5 and communicates with pressure stabilizing tank 2 through notch valve 4, the other end of pump inlet pipeline 3 links to each other with constant delivery pump 6, the one end of pump outlet pipeline 7 and the export intercommunication of constant delivery pump 6, the other end of pump outlet pipeline 7 links to each other with synthetic cauldron 16, buffer tank 8, back pressure valve 12, rotor flow meter 13, reducing pipe 14 and electromagnetic flowmeter 15 set gradually on pump outlet pipeline 7 from pump outlet pipeline's one end to feed liquid output 701, evacuation pipe 9 one end is connected on the pump outlet pipeline between buffer tank 8 and back pressure valve 12, the other end is the evacuation end, first outlet valve 10 sets up on evacuation pipe 9, second outlet valve 11 is located between the one end of evacuation pipe 9 and pump outlet pipeline 7 junction position and back pressure valve 12.
Three experiments were performed using the above feed system as follows:
the first experiment was: a feeding system for synthesizing a lithium ion battery anode precursor is characterized in that the maximum flow of a dosing pump 6 of a feeding and conveying assembly 101 for conveying a nickel-cobalt-manganese sulfate material liquid and a feeding and conveying assembly 105 for conveying a mixed material liquid of sodium hydroxide and ammonia water is 600L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 103 for conveying an alkali-containing sodium sulfate material liquid is 1000L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 104 for conveying an ammonia water material liquid is 150L/h, the pre-valve pressure of a back pressure valve 12 is adjusted to be 0.3MPa, and according to the maximum flow of 220L/h of the dosing pump 6 of the feeding and conveying assembly 101 for conveying the nickel-cobalt-manganese sulfate material liquid and the feeding and conveying assembly 105 for conveying the mixed material liquid of sodium hydroxide and ammonia water and the maximum flow of 60L/h of the ammonia water pump 6 of the feeding and conveying assembly 104 for conveying the ammonia water material, the maximum flow 520L/h of the quantitative pump 6 of the feeding and conveying assembly 103 for conveying the alkali-containing sodium sulfate solution sets the stroke of the quantitative pump 6 for the rated flow, the instantaneous flow fluctuation of the conveying system after actual check is less than +/-0.2%, and the error between the total volume of the actual conveying flow and the set value in unit time is less than +/-0.2%.
The second experiment was: a feeding system for synthesizing a lithium ion battery anode precursor is characterized in that the maximum flow of a dosing pump 6 of a feeding and conveying assembly 101 for conveying a nickel-cobalt-manganese sulfate material liquid and a feeding and conveying assembly 105 for conveying a mixed material liquid of sodium hydroxide and ammonia water is 600L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 103 for conveying an alkali-containing sodium sulfate material liquid is 1000L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 104 for conveying an ammonia water material liquid is 150L/h, the pre-valve pressure of a back pressure valve 12 is adjusted to be 0.3MPa, and according to the maximum flow of 280L/h of a dosing pump 6 of a feeding and conveying assembly 101 for conveying a nickel-cobalt-manganese sulfate material liquid and a feeding and conveying assembly 105 for conveying a mixed material liquid of sodium hydroxide and ammonia water and the maximum flow of 90L/h of a dosing pump 6 of a feeding and conveying assembly 104 for conveying an ammonia water material liquid, the maximum flow rate of 720L/h of the quantitative pump 6 of the feeding and conveying assembly 103 for conveying the alkali-containing sodium sulfate feed liquid is set as the rated flow rate, the stroke of the quantitative pump 6 is set, after actual check, the instantaneous flow fluctuation of the conveying system is less than +/-0.2%, and the error between the total volume of the actual conveying flow rate and the set value in unit time is less than +/-0.2%.
The third experiment was: a feeding system for synthesizing a lithium ion battery anode precursor is characterized in that the maximum flow of a dosing pump 6 of a feeding and conveying assembly 101 for conveying a nickel cobalt manganese sulfate material liquid and a feeding and conveying assembly 102 for conveying a mixed material liquid of sodium hydroxide and sodium metaaluminate is 600L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 103 for conveying an alkali sodium sulfate material liquid is 1000L/h, the maximum flow of a dosing pump 6 of a feeding and conveying assembly 104 for conveying an ammonia water material liquid is 150L/h, the pressure before a back pressure valve 12 is adjusted to be 0.3MPa, according to the maximum flow of 180L/h of the dosing pump 6 of the feeding and conveying assembly 101 for conveying the nickel cobalt manganese sulfate material liquid and the feeding and conveying assembly 102 for conveying the mixed material liquid of sodium hydroxide and sodium metaaluminate, the maximum flow of the dosing pump 6 of the feeding and conveying assembly 104 for conveying the ammonia water material liquid is 150L/h, the maximum flow rate 350L/h of the quantitative pump 6 of the feeding and conveying assembly 103 for conveying the alkali-containing sodium sulfate feed liquid is set as the stroke of the quantitative pump 6 for the rated flow rate, the instantaneous flow rate fluctuation of the conveying system after actual checking is less than +/-0.2%, and the error between the total volume of the actual conveying flow rate and the set value in unit time is less than +/-0.2%.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. A feed transport assembly, comprising:
the pressure stabilizing tank is used for storing feed liquid with constant liquid level;
one end of the pump inlet pipeline is communicated with the pressure stabilizing groove;
the other end of the pump inlet pipeline is communicated with the inlet of the fixed displacement pump;
one end of the pump outlet pipeline is communicated with the outlet of the dosing pump, and the other end of the pump outlet pipeline is a feed liquid output end;
the back pressure valve is arranged on the pump outlet pipeline;
an electromagnetic flow meter disposed on the pump outlet line and downstream of the back pressure valve.
2. The feed delivery assembly of claim 1, wherein a notch is provided in a side wall of the surge tank adjacent to a bottom of the surge tank, the notch being provided with a notch valve to open and close the notch; one end of the pump inlet pipeline is connected with the notch valve.
3. The feed delivery assembly of claim 2, further comprising a filter disposed on the pump inlet line adjacent to the slot valve.
4. The feed delivery assembly of claim 1, wherein the dosing pump is a mechanical diaphragm dosing pump.
5. The feed delivery assembly of claim 4, wherein the membrane of the mechanical membrane dosing pump is a double-layer membrane, each of the double-layer membrane being connected to an alarm device to provide a warning message when any one of the double-layer membrane is broken.
6. The feed delivery assembly of claim 1, wherein the pump inlet line is a rigid tube of PPH or CPVC material; the pump outlet pipeline is a hard pipe made of PPH material or CPVC material.
7. The feed delivery assembly of any one of claims 1 to 6, further comprising a buffer tank connected to the pump outlet line and adjacent to the outlet of the dosing pump.
8. The feed delivery assembly of claim 7, further comprising an evacuation tube, one end of the evacuation tube being positioned between the surge tank and the back pressure valve and connected to the pump outlet line, the other end of the evacuation tube being an evacuation end; and a first outlet valve is arranged on the emptying pipe.
9. The feed delivery assembly of claim 8, wherein a second outlet valve is provided on the pump outlet line between a connection between one end of the evacuation tube and the pump outlet line and the back pressure valve.
10. The feed delivery assembly of claim 1, wherein the pump outlet line comprises a variable diameter pipe section, the variable diameter pipe section is located between the back pressure valve and the electromagnetic flow meter, and the inner diameter of the variable diameter pipe section gradually decreases from upstream to downstream.
11. The feed delivery assembly of claim 10, wherein a rotameter is disposed on the pump outlet line, the rotameter being positioned between the back pressure valve and the variable diameter pipe section.
12. A feeding system for synthesis of a positive precursor of a lithium ion battery is characterized by comprising
A synthesis kettle;
a plurality of feed conveying assemblies according to any one of claims 1 to 11, wherein the plurality of feed conveying assemblies are respectively used for conveying a plurality of feed liquids required for synthesis of lithium ion battery anode precursors, and the feed liquid output ends of the plurality of feed conveying assemblies are respectively connected with the synthesis kettle.
13. The lithium ion battery positive electrode precursor synthesis feeding system according to claim 12, further comprising a support, wherein a plurality of feeding conveying assemblies are sequentially and fixedly supported on the support to form a prying device.
14. The lithium ion battery positive precursor synthesis feed system of claim 13, further comprising a meter control device, wherein the meter control device comprises a first control element for controlling the start and stop of the dosing pump, a second control element for controlling the variable frequency regulation of the dosing pump, and a third control element for controlling the electromagnetic flow meter, and the first control element, the second control element, and the third control element are integrated in a meter box.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111921267A (en) * | 2020-07-23 | 2020-11-13 | 华友新能源科技（衢州）有限公司 | Method for stably separating mother liquor in precursor synthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921267A (en) * | 2020-07-23 | 2020-11-13 | 华友新能源科技（衢州）有限公司 | Method for stably separating mother liquor in precursor synthesis |
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