CN218554062U - Positive electrode material precursor coprecipitation reaction system - Google Patents
Positive electrode material precursor coprecipitation reaction system Download PDFInfo
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- CN218554062U CN218554062U CN202220900512.3U CN202220900512U CN218554062U CN 218554062 U CN218554062 U CN 218554062U CN 202220900512 U CN202220900512 U CN 202220900512U CN 218554062 U CN218554062 U CN 218554062U
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Abstract
The utility model also provides a cathode material precursor coprecipitation reaction system, include: the precursor reaction kettle comprises a reaction kettle, a stirring component and a filtering component, wherein the reaction kettle is used for containing precursor slurry and allowing the precursor slurry to react in the reaction kettle, the stirring component is arranged in the reaction kettle and is used for stirring the precursor slurry in the reaction kettle, and the filtering component is arranged in the reaction kettle and is used for intercepting the precursor in the reaction kettle to obtain concentrated precursor slurry and filtering out filtrate; and the negative pressure pumping device is connected with a filtered liquid outlet of the filtering assembly and is used for pumping the filtered liquid out of the reaction kettle. Therefore, the stable clear-out of the positive electrode material precursor coprecipitation reaction system and the stable and continuous operation of the system are ensured.
Description
Technical Field
The utility model relates to a precursor production technical field, concretely relates to anode material precursor coprecipitation reaction system.
Background
The precursor slurry is a front-end material of the anode material and plays a decisive role in the performance of the anode material. The production method of the precursor of the positive electrode material generally comprises the following steps: preparing a mixed salt solution of nickel sulfate (or nickel chloride), cobalt sulfate (or cobalt chloride) and manganese sulfate (or manganese chloride) with a certain molar concentration, preparing an alkali solution with a certain molar concentration by using sodium hydroxide, and using ammonia water with a certain concentration as a complexing agent. Adding the filtered mixed salt solution, the alkali solution and the complexing agent into a reaction kettle at a certain flow rate, controlling the stirring speed of the reaction kettle, the temperature and the pH value of the reaction slurry, performing neutralization reaction on the salt and the alkali to generate a ternary precursor crystal nucleus, gradually growing up the ternary precursor crystal nucleus, and concentrating and drying the reaction slurry after the granularity reaches a preset value to obtain the ternary precursor.
In the process of producing the precursor of the anode material by using the conventional reaction kettle, liquid only can realize the processes of reaction and gradual growth of crystal nucleus in the reaction kettle. However, for materials with slow reaction time, the main reaction kettle and the secondary reaction kettle are required to cooperate to realize the slurry reaction process, wherein crystal growth is realized in the main reaction kettle, and particle diameter redistribution and morphology adjustment are performed in the secondary reaction kettle. On the basis, if the liquid in the reaction kettle needs to be concentrated, an independent thickener needs to be additionally arranged, so that the equipment investment is greatly increased, and the time for dissociating the slurry outside the reaction kettle is prolonged. In order to reduce the equipment investment, the applicant tries to combine the secondary reaction of the secondary reaction kettle with the concentrated supernatant of the thickener, however, since the thickener needs a certain pressure to pump the supernatant out, the previous supernatant pump-out is carried out under the micro-positive pressure environment formed by the primary reaction kettle and the secondary reaction kettle, however, after the secondary reaction kettle and the thickener are combined to realize the simultaneous reaction and concentration of the supernatant, the pressure environment under the condition causes the system to discharge out normally. In addition, with the increase of the working time, filter cakes are continuously attached to the surfaces of the filtering components of the thickener, and the filter cakes directly influence the filtering flux of the filtering components in the thickener and also directly influence the reaction time of materials in the thickener.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a precursor reation kettle to when solving among the prior art precursor concentration and reaction synthesis and applying, can't satisfy precursor production reaction temperature's technical problem.
In order to achieve the above object, according to one aspect of the present invention, a precursor reaction kettle is provided, which comprises
The reaction kettle is used for accommodating the precursor slurry and allowing the precursor slurry to react therein;
the input unit is used for inputting the precursor slurry into the reaction kettle;
the stirring assembly is arranged in the reaction kettle and is used for stirring the precursor slurry in the reaction kettle;
the filtering component is arranged in the reaction kettle and is used for intercepting a precursor in the reaction kettle to obtain concentrated precursor slurry and filtering out a filtrate;
and the outer surface of the reaction kettle is provided with a heat insulation structure.
Further, the heat preservation structure comprises a jacket wrapped on the outer surface of the reaction kettle, and further comprises a heat preservation liquid inlet and a heat preservation liquid outlet which are arranged on the jacket.
Further, the heat preservation structure is a structure for maintaining the temperature in the reaction kettle at 50-60 ℃.
Further, a discharging pipe communicated with the inside of the reaction kettle is vertically and downwards arranged at the bottom of the reaction kettle, the discharging pipe penetrates through the clamping sleeve to the outside of the reaction kettle, and the cross part of the discharging pipe and the clamping sleeve is welded and sealed.
Furthermore, the filter assembly comprises a filter liquid pipe fixed in the reaction kettle and filter elements fixed on the filter liquid pipe at intervals, the filter liquid pipe comprises an outer ring pipe and an inner ring pipe which are arranged along the radial direction of the reaction kettle from outside to inside, the outer ring pipe and the inner ring pipe are connected with a clear liquid outlet system through the clear liquid filtering pipe, and the outer ring pipe and the inner ring pipe are sealing pipes.
Furthermore, the outer ring pipe is connected with a clear liquid outlet system through a clear liquid filtering pipe, and the inner ring pipe is connected and communicated with a filter liquid pipe through a bent pipe.
Furthermore, the elbow penetrates through a jacket at the bottom of the reaction kettle and extends to the outside of the reaction kettle, and the intersection of the filter liquor pipe and the jacket is welded and sealed.
Further, the arrangement position of the inner ring pipe is higher than that of the outer ring pipe.
Therefore, the stirring assembly and the filtering assembly are arranged in the reaction kettle, so that the concentration and enrichment of the precursor in the reaction kettle are met, and the requirement on stable reaction temperature in the reaction kettle is met by the additionally arranged heat insulation structure. Therefore, the utility model can meet the concentration, enrichment and reaction of the precursor slurry in the reaction tank.
The utility model also provides a cathode material precursor coprecipitation reaction system, include:
the precursor reaction kettle comprises a reaction kettle, a stirring component and a filtering component, wherein the reaction kettle is used for containing precursor slurry and allowing the precursor slurry to react in the reaction kettle, the stirring component is arranged in the reaction kettle and is used for stirring the precursor slurry in the reaction kettle, and the filtering component is arranged in the reaction kettle and is used for intercepting the precursor in the reaction kettle to obtain concentrated precursor slurry and filtering out filtrate;
go out clear subassembly, include with filtering component go out clear liquid pipe of clear liquid mouth intercommunication, set up the clear liquid pump of going out on a clear liquid pipe, it is the hose pump to go out the clear liquid pump.
Furthermore, the inlet and the outlet of the hose pump are provided with thin-wall ball valves.
Furthermore, the heat exchange device is arranged on the clear liquid outlet pipe and is arranged at the front end of the hose pump.
Further, the heat exchange device is a plate type heat exchange device, a straight pipe heat exchange device or a spiral pipe heat exchange device.
Further, still include regeneration assembly, regeneration assembly includes:
the backflushing container is used for containing backflushing gas/backflushing liquid, and the outlet of the backflushing container is connected with the clear filtrate outlet of the filtering component to be regenerated;
the gas inlet control assembly is used for controlling the regenerated gas to be input into the backflushing container;
the liquid inlet control assembly is used for controlling the regenerated liquid to be input into the backflushing container;
the backflushing control assembly is used for controlling the regenerated gas/regenerated liquid to be output from the outlet of the backflushing container;
the pure water control component is used for controlling pure water to be input into the backflushing container;
wherein the outlet of the backflushing container is connected with the emptying assembly.
Further, the outer surface of the reaction kettle is provided with a heat insulation structure.
Further, the heat preservation structure comprises a jacket wrapped on the outer surface of the reaction kettle, and further comprises a heat preservation liquid inlet and a heat preservation liquid outlet which are arranged on the jacket.
Further, the filtering component is annularly arranged in the reaction kettle around the stirring component.
Furthermore, the filtering component comprises a filtering liquid pipe fixed in the reaction kettle and a filter element fixed on the filtering liquid pipe at intervals, the filtering liquid pipe comprises an outer ring pipe and an inner ring pipe which are arranged along the radial outside-in direction of the reaction kettle, the outer ring pipe and the inner ring pipe are connected with a clear liquid outlet system through the filtering liquid pipe, and the outer ring pipe and the inner ring pipe are sealing pipes.
Furthermore, the outer ring pipe is connected with a clear liquid outlet pipe through the outside of the clear liquid filtering pipe, and the inner ring pipe is connected and communicated with the clear liquid filtering pipe through a bent pipe.
The utility model also provides a cathode material precursor coprecipitation reaction system, include:
the precursor reaction kettle comprises a reaction kettle, a stirring component and a filtering component, wherein the reaction kettle is used for containing precursor slurry and allowing the precursor slurry to react in the reaction kettle, the stirring component is arranged in the reaction kettle and is used for stirring the precursor slurry in the reaction kettle, and the filtering component is arranged in the reaction kettle and is used for intercepting the precursor in the reaction kettle to obtain concentrated precursor slurry and filtering out filtrate;
and the negative pressure pumping device is connected with a filtered liquid outlet of the filtering assembly and is used for pumping the filtered liquid out of the reaction kettle.
Further, negative pressure pumping installations includes the play liquid pipe that communicates with the clear liquid export, with the negative pressure pump of a clear liquid pipe intercommunication and set up pressure transmitter, manometer, temperature transmitter, the pneumatic ball valve on a clear liquid pipe.
Furthermore, the filtering components at least comprise two groups of filtering components, and clear liquid outlet ports of each group of filtering components are respectively connected with corresponding clear liquid outlet pipes after being converged.
Furthermore, the maximum negative pressure of the negative pressure pump is-0.8 bar, and the maximum output pressure of the negative pressure pump is 2-6bar.
Furthermore, the filter assembly comprises a filter liquid pipe fixed in the reaction kettle and a filter element fixed on the filter liquid pipe at intervals, the filter liquid pipe comprises an outer ring pipe and an inner ring pipe which are arranged along the radial outside-in direction of the reaction kettle, the outer ring pipe and the inner ring pipe are connected with a clear liquid outlet system through the clear liquid outlet pipe, and the outer ring pipe and the inner ring pipe are sealing pipes.
Furthermore, the outer ring pipe is externally connected with a clear liquid outlet system through a clear liquid outlet pipe, and the inner ring pipe is connected and communicated with the clear liquid outlet pipe through a bent pipe.
Further, the clear liquid outlet pipe is communicated with a clear liquid outlet arranged at the bottom of the reaction kettle.
Further, the arrangement position of the inner ring pipe is higher than that of the outer ring pipe.
The present invention will be further described with reference to the accompanying drawings and the detailed description. 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 accompanying drawings, which form a part of the disclosure, are included to assist in understanding the disclosure, and the description provided herein and the accompanying drawings, which are related thereto, are intended to explain the disclosure, but do not constitute an undue limitation on the disclosure. In the drawings:
fig. 1 is a schematic diagram of a system structure of the co-precipitation reaction system for precursors of the cathode material of the present invention.
Fig. 2 is a top view of the installation structure of the middle filter assembly of the present invention.
Fig. 3 is a second top view of the installation structure of the filtering component of the present invention.
Fig. 4 is a schematic structural diagram of a first connection mode of the medium filtering liquid pipe and the clear liquid outlet pipe of the present invention.
Fig. 5 is a schematic structural view of a connection mode two of the medium filtering liquid pipe and the clear liquid outlet pipe of the present invention.
Fig. 6 is a schematic structural view of a third connection mode of the medium filtering liquid pipe and the clear liquid outlet pipe of the present invention.
Fig. 7 is a schematic structural view of a fourth connection mode of the middle filtering liquid pipe and the clear liquid outlet pipe of the present invention.
Detailed Description
The present invention will be described more fully with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before the present invention is described with reference to the accompanying drawings, it should be noted that:
the technical solutions and features provided in the various parts of the present invention, including the following description, may be combined with each other without conflict.
Moreover, references to embodiments of the invention in the following description are generally only to be considered as examples of the invention, and not as all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.
With respect to the terms and units of the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
The utility model discloses positive electrode material precursor coprecipitation reaction system, include:
the precursor reaction kettle 2 comprises a reaction kettle 21, a stirring component 22 and a filtering component 23, wherein the reaction kettle 21 is used for accommodating precursor slurry and allowing the precursor slurry to react therein, the stirring component 22 is arranged in the reaction kettle 21 and is used for stirring the precursor slurry in the reaction kettle 21, and the filtering component 23 is arranged in the reaction kettle 21 and is used for intercepting the precursor in the reaction kettle 21 to obtain concentrated precursor slurry and filtering out filtrate;
go out clear subassembly, including the play clear liquid pipe 11 with filter assembly 23 play clear liquid mouth intercommunication, set up play clear liquid pump 12 on going out clear liquid pipe 11, it is the hose pump to go out clear liquid pump 12.
And the inlet and the outlet of the hose pump are provided with thin-wall ball valves 4.
Still including setting up the heat transfer device 5 on going out the clear liquid pipe 11, heat transfer device 5 sets up in the front end of hose pump.
The heat exchange device 5 is a plate type heat exchange device, a straight pipe heat exchange device or a spiral pipe heat exchange device 5.
Also included is a regeneration assembly comprising:
a backflushing container 6 for containing backflushing gas/backflushing liquid, an outlet of the backflushing container 6 being connected with a filtrate outlet of the filter assembly 23 to be regenerated;
the air inlet control component is used for controlling the regenerated gas to be input into the backflushing container 6;
the liquid inlet control component is used for controlling the regenerated liquid to be input into the backflushing container 6;
the backflushing control component is used for controlling the regenerated gas/regenerated liquid to be output from the outlet of the backflushing container 6 to the backflushing container 6;
the pure water control component is used for controlling pure water to be input into the backflushing container 6;
wherein the outlet of the backflushing container 6 is connected with the emptying assembly.
And a heat insulation structure is arranged on the outer surface of the reaction kettle 21.
The heat preservation structure comprises a jacket 3 wrapped on the outer surface of the reaction kettle 21, and further comprises a heat preservation liquid inlet 31 and a heat preservation liquid outlet 32 which are arranged on the jacket 3.
The filtering component 23 is arranged in the reaction kettle 21 around the stirring component 22 in a circumferential direction.
The filter assembly 23 comprises a filter liquid pipe fixed in the reaction kettle 21 and filter elements fixed on the filter liquid pipe at intervals, the filter liquid pipe comprises an outer ring pipe 231 and an inner ring pipe 232 which are arranged along the radial outside-in direction of the reaction kettle 21, the outer ring pipe 231 and the inner ring pipe 232 are connected with a clear liquid outlet system through the clear liquid pipe, and the outer ring pipe 231 and the inner ring pipe 232 are sealing pipes.
The outer ring pipe 231 is connected with the clear liquid outlet pipe 11 through the outside of the clear liquid filtering pipe, and the inner ring pipe 232 is connected and communicated with the clear liquid filtering pipe through an elbow pipe.
The utility model discloses well precursor reation kettle 2, include
The reaction kettle 21 is used for accommodating the precursor slurry and allowing the precursor slurry to react therein;
an input unit for inputting the precursor slurry into the reaction kettle 21;
the stirring component 22 is arranged in the reaction kettle 21 and is used for stirring the precursor slurry in the reaction kettle 21;
the filtering component 23 is arranged in the reaction kettle 21 and used for intercepting the precursor in the reaction kettle 21 to obtain concentrated precursor slurry and filtering out filtered liquid;
and the outer surface of the reaction kettle 21 is provided with a heat insulation structure.
The heat preservation structure comprises a jacket 3 wrapped on the outer surface of the reaction kettle 21, and further comprises a heat preservation liquid inlet 31 and a heat preservation liquid outlet 32 which are arranged on the jacket 3.
The heat preservation structure is a structure for maintaining the temperature in the reaction kettle 21 at 50-60 ℃.
A discharging pipe communicated with the inside of the reaction kettle 21 is vertically arranged at the bottom of the reaction kettle 21 downwards, the discharging pipe penetrates through the jacket 3 to the outside of the reaction kettle 21, and the cross part of the discharging pipe and the jacket 3 is welded and sealed.
The filter assembly 23 comprises a filter liquid pipe fixed in the reaction kettle 21 and filter elements fixed on the filter liquid pipe at intervals, the filter liquid pipe comprises an outer ring pipe 231 and an inner ring pipe 232 which are arranged along the radial outside-in direction of the reaction kettle 21, the outer ring pipe 231 and the inner ring pipe 232 are connected with a clear liquid outlet system through the clear liquid pipe, and the outer ring pipe 231 and the inner ring pipe 232 are sealing pipes.
The bent pipe penetrates through the jacket 3 at the bottom of the reaction kettle 21 and extends to the outside of the reaction kettle 21, and the intersection of the filter liquor pipe and the jacket 3 is welded and sealed.
The inner ring pipe 232 is disposed at a position higher than the outer ring pipe 231.
The utility model discloses well positive electrode material precursor coprecipitation reaction system, include:
the precursor reaction kettle 2 comprises a reaction kettle 21, a stirring component 22 and a filtering component 23, wherein the reaction kettle 21 is used for accommodating precursor slurry and allowing the precursor slurry to react therein, the stirring component 22 is arranged in the reaction kettle 21 and is used for stirring the precursor slurry in the reaction kettle 21, and the filtering component 23 is arranged in the reaction kettle 21 and is used for intercepting the precursor in the reaction kettle 21 to obtain concentrated precursor slurry and filtering out filtrate;
and the negative pressure pumping device is connected with a filtrate outlet of the filtering assembly 23 and is used for pumping the filtrate out of the reaction kettle 21.
The negative pressure pumping device comprises a clear liquid outlet pipe 11 communicated with a clear liquid filtering outlet, a negative pressure pump communicated with the clear liquid outlet pipe 11, and a pressure transmitter, a pressure gauge 12, a temperature transmitter and a pneumatic ball valve which are arranged on the clear liquid outlet pipe 11.
The filtering components 23 at least comprise two groups of filtering components 23, and clear liquid outlets of each group of filtering components 23 are respectively connected with the corresponding clear liquid outlet pipes 11 after being converged.
The maximum negative pressure of the negative pressure pump is-0.8 bar, and the maximum output pressure of the negative pressure pump outlet is 2-6bar.
The filter assembly 23 comprises a filter liquid pipe fixed in the reaction kettle 21 and a filter element fixed on the filter liquid pipe at intervals, the filter liquid pipe comprises an outer ring pipe 231 and an inner ring pipe 232 which are arranged along the radial outside-in direction of the reaction kettle 21, the outer ring pipe 231 and the inner ring pipe 232 are connected with a clear liquid system through a clear liquid outlet pipe 11, and the outer ring pipe 231 and the inner ring pipe 232 are sealed pipes.
The clear liquid outlet pipe 11 is communicated with a clear liquid filtering outlet arranged at the bottom of the reaction kettle 21.
The inner ring pipe 232 is disposed at a position higher than the outer ring pipe 231.
As shown in fig. 1, the front-body system of the present invention includes the following structural modules: precursor reation kettle 2, play clear subassembly, regeneration subassembly.
The precursor reaction kettle 2 comprises a reaction kettle 21, a stirring component 22 and a filtering component 23, wherein the reaction kettle 21 is used for containing precursor slurry and allowing the precursor slurry to react therein, the stirring component 22 is arranged in the reaction kettle 21 and used for stirring the precursor slurry in the reaction kettle 21, and the filtering component 23 is arranged in the reaction kettle 21 and used for intercepting the precursor in the reaction kettle 21 to obtain concentrated precursor slurry and filtering out filtrate. And a heat insulation structure is arranged on the outer surface of the reaction kettle 21.
The heat preservation structure comprises a jacket 3 wrapped on the outer surface of the reaction kettle 21, and further comprises a heat preservation liquid inlet 31 and a heat preservation liquid outlet 32 which are arranged on the jacket 3. The heat preservation structure is a structure for maintaining the temperature in the reaction kettle 21 at 50-60 ℃. A discharging pipe communicated with the inside of the reaction kettle 21 is vertically arranged at the bottom of the reaction kettle 21 downwards, the discharging pipe penetrates through the jacket 3 to the outside of the reaction kettle 21, and the cross part of the discharging pipe and the jacket 3 is welded and sealed.
Wherein, go out clear subassembly, including the play clear liquid pipe 11 with filter assembly 23 play clear liquid mouth intercommunication, set up play clear liquid pump 12 on going out clear liquid pipe 11, it is the hose pump to go out clear liquid pump 12. And the inlet and the outlet of the hose pump are provided with thin-wall ball valves 4. The heat exchanger is characterized by further comprising a heat exchanger 5 arranged on the liquid outlet pipe 11, wherein the heat exchanger 5 is arranged at the front end of the hose pump. The heat exchange device 5 is a plate type heat exchange device, a straight pipe heat exchange device or a spiral pipe heat exchange device 5.
The clear liquid outlet assembly is preferably a negative pressure pumping device which is connected with a clear liquid outlet of the filtering assembly 23 and is used for pumping the clear liquid out of the reaction kettle 21. The negative pressure pumping device comprises a clear liquid outlet pipe 11 communicated with a clear liquid filtering outlet, a negative pressure pump communicated with the clear liquid outlet pipe 11, and a pressure transmitter, a pressure gauge 12, a temperature transmitter and a pneumatic ball valve which are arranged on the clear liquid outlet pipe 11. The filtering components 23 at least comprise two groups of filtering components 23, and clear liquid outlets of each group of filtering components 23 are respectively connected with the corresponding clear liquid outlet pipes 11 after being converged. The maximum negative pressure of the suction inlet of the negative pressure pump is-0.8 bar, and the maximum output pressure of the outlet of the negative pressure pump is about 3 bar. The utility model provides a following several kinds of negative pressure play clear modes:
vacuum pump purge characteristics are shown in table 1:
TABLE 1
The characteristics of the diaphragm pump are as follows:
TABLE 2
Hose pump out characteristics are shown in table 3 below:
TABLE 3
The water ring pump out characteristics are shown in table 4 below:
TABLE 4
As can be seen from tables 1-4 above, the use of the hose pump works best in the positive electrode material precursor coprecipitation reaction system.
The regeneration assembly includes: the backflushing container 6 is used for containing backflushing gas/backflushing liquid, and the outlet of the backflushing container 6 is connected with the clear filtrate outlet of the filtering component 23 to be regenerated; the air inlet control component is used for controlling the regenerated gas to be input into the backflushing container 6; the liquid inlet control component is used for controlling the regenerated liquid to be input into the backflushing container 6; the backflushing control component is used for controlling the regenerated gas/regenerated liquid to be output from the outlet of the backflushing container 6 to the backflushing container 6;
the pure water control component is used for controlling pure water to be input into the backflushing container 6; wherein the outlet of the backflushing container 6 is connected with the emptying assembly.
The utility model discloses positive pole material precursor coprecipitation reaction system uses in the production process of ternary precursor, and ternary precursor thick liquids realize that the enrichment is concentrated and the reaction in precursor reation kettle 2 through negative pressure pump evacuation negative pressure effect, and insulation construction has guaranteed the reaction temperature of precursor in reation kettle 21, and the negative pressure pump is preferably the hose pump to the more accurate regulation and control of the effect of taking out the negative pressure, guarantees the stability of entire system play clearance to guarantee the stable quality of precursor product. The filter component is regenerated periodically through the regeneration component, so that the continuity of production is ensured. Because the normal working temperature of the hose pump is about 40 ℃, the hose pump can bear 50 ℃ in a short time, the temperature is preferably reduced from 60 ℃ to 40 ℃ in the negative pressure pump heat exchange device 5.
As shown in fig. 2-3, the filtering unit includes a filtering liquid pipe fixed in the reaction kettle 21, and a filtering assembly 235 fixed on the filtering liquid pipe at intervals, the filtering liquid pipe includes an outer ring pipe 231 and an inner ring pipe 232 arranged along the radial direction of the reaction kettle 21 from outside to inside, both the outer ring pipe 231 and the inner ring pipe 232 are externally connected with a clear liquid system through a clear liquid outlet pipe 233, and both the outer ring pipe 231 and the inner ring pipe 232 are sealed pipes.
The utility model discloses the connected mode of following four kinds of different filter liquor pipes and play liquid pipe is still provided:
the first connection is shown in fig. 4: the outer ring pipe 231 is externally connected with a clear liquid discharging system through a clear liquid discharging pipe 233, and the inner ring pipe 232 and the outer ring pipe 231 are connected and communicated through a horizontal straight pipe 234. Wherein, two ends of the horizontal straight pipe 234 are respectively welded on the inner ring pipe 232 and the outer ring pipe 231 through T-shaped welding structures. When the clear liquid outlet on the reaction kettle 21 is arranged on the bottom of the reaction kettle 21, the clear liquid outlet pipe 233 can be a straight pipe which vertically extends downwards to the outside of the reaction kettle 21 and is communicated with the clear liquid outlet component; when the clear liquid outlet on the reaction vessel 21 is disposed on the side of the reaction vessel 21, the clear liquid outlet pipe 233 may be a bent pipe extending out of the reaction vessel 21 to communicate with the clear liquid outlet assembly.
The second connection is shown in fig. 5: the outer ring pipe 231 and the inner ring pipe 232 are located at the same height, the outer ring pipe 231 is externally connected with a clear liquid discharging system through a clear liquid discharging pipe 233, and the inner ring pipe 232 is connected and communicated with the clear liquid discharging pipe 233 through an elbow pipe 236. When the clear liquid outlet on the reaction kettle 21 is arranged on the bottom of the reaction kettle 21, the clear liquid outlet pipe 233 can be a straight pipe vertically extending downwards to the outside of the reaction kettle 21 and communicated with the clear liquid outlet assembly; when the clear liquid outlet on the reaction vessel 21 is disposed on the side of the reaction vessel 21, the clear liquid outlet pipe 233 may be a bent pipe extending out of the reaction vessel 21 to communicate with the clear liquid outlet assembly.
The third connection is shown in fig. 6: the setting height of the inner ring pipe 232 is higher than that of the outer ring pipe 231, the outer ring pipe 231 is externally connected with a clear liquid discharging system through a clear liquid discharging pipe 233, and the inner ring pipe 232 is connected and communicated with the clear liquid discharging pipe 233 through an elbow pipe 236. When the clear liquid outlet on the reaction kettle 21 is arranged on the bottom of the reaction kettle 21, the clear liquid outlet pipe 233 can be a straight pipe which vertically extends downwards to the outside of the reaction kettle 21 and is communicated with the clear liquid outlet component; when the clear liquid outlet on the reaction vessel 21 is disposed on the side of the reaction vessel 21, the clear liquid outlet pipe 233 may be a bent pipe extending out of the reaction vessel 21 to communicate with the clear liquid outlet assembly.
The fourth connection mode is shown in fig. 7: the outer ring pipe 231 and the inner ring pipe 232 are independently arranged, and the inner ring pipe 232 and the outer ring pipe 231 are respectively externally connected with a clear liquid discharging system through independent clear liquid discharging pipes 233. When the clear liquid outlet on the reaction kettle 21 is arranged on the bottom of the reaction kettle 21, the clear liquid outlet pipe 233 can be a straight pipe vertically extending downwards to the outside of the reaction kettle 21 and communicated with the clear liquid outlet assembly; when the clear liquid outlet on the reaction vessel 21 is disposed on the side of the reaction vessel 21, the clear liquid outlet pipe 233 may be a bent pipe extending out of the reaction vessel 21 to communicate with the clear liquid outlet assembly. In this connection, in order to mount the clear liquid discharge pipe 233 more easily, one end of the inner ring pipe 232 is longer than the corresponding end of the outer ring pipe 231, the clear liquid discharge pipe 233 of the inner ring is connected to and conducted with the end of the inner ring pipe 232, and the clear liquid discharge pipe 233 of the outer ring is connected to and conducted with the end of the outer ring pipe 231.
As best shown in fig. 2 to 3, the reaction kettle 21 is provided with a fixing member in the radial direction, and the inner ring tube 232 and the outer ring tube 231 are arranged on the fixing member from inside to outside. The fixing piece is a fixing rod 121, and two ends of the inner ring tube 232 and the outer ring tube 231 are respectively connected with the fixing rod 121 through welding; or the two ends of the inner ring tube 232 and the outer ring tube 231 are fixed on the fixing rod 121 through the hoop 1221. The inner ring pipe 232 and the outer ring pipe 231 are both arc pipes. The filter assembly 23 comprises four filter units, and the central angle of the arc-shaped pipe is 60 degrees.
When the filtering component is installed, the upper end and the lower end of the filtering component can be fixed or only the lower end of the filtering component is fixed. When the filter assembly is installed, the lower end of the filter assembly is connected to the mounting hole formed in the upper end of the filter liquid pipe through threads, and the upper end of the filter assembly is fixedly connected with the reaction kettle through angle steel. The filter component can adopt one of a titanium alloy filter element, a 316 stainless steel filter element, a 2205 duplex stainless steel filter element, a silicon carbide material, PVDF and other materials. The single-end is fixed and is likely to take place filter core fracture accident when filter assembly self length is longer, consequently exceeds 500 mm's filter assembly when using the utility model discloses a when concentrated machine, adopt the bi-polar fixed.
It should be noted that, other connection modes can be combined by arranging the structural features of the four connection modes, and these connection modes are also within the protection scope of the present invention.
The contents of the present invention have been explained above. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Based on the above-mentioned contents of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Claims (8)
1. Positive pole material precursor coprecipitation reaction system, which is characterized by comprising:
the precursor reaction kettle (2) comprises a reaction kettle (21), a stirring component (22) and a filtering component (23), wherein the reaction kettle (21) is used for containing precursor slurry and allowing the precursor slurry to react in the reaction kettle, the stirring component (22) is arranged in the reaction kettle (21) and is used for stirring the precursor slurry in the reaction kettle (21), and the filtering component (23) is arranged in the reaction kettle (21) and is used for intercepting the precursor in the reaction kettle (21) to obtain concentrated precursor slurry and filtering out filtrate;
and the negative pressure pumping device is connected with a filtrate outlet of the filtering assembly (23) and is used for pumping the filtrate out of the reaction kettle (21).
2. The positive electrode material precursor coprecipitation reaction system of claim 1, wherein the negative pressure pumping device comprises a clear liquid outlet pipe (11) communicated with the filtered liquid outlet, a negative pressure pump communicated with the clear liquid outlet pipe (11), and a pressure transmitter, a pressure gauge (12), a temperature transmitter and a pneumatic ball valve which are arranged on the clear liquid outlet pipe (11).
3. The cathode material precursor coprecipitation reaction system of claim 1, wherein the filter assemblies (23) comprise at least two groups of filter assemblies (23), and the clear liquid outlets of each group of filter assemblies (23) are respectively connected with the corresponding clear liquid outlet pipes (11) after being collected.
4. The positive electrode material precursor coprecipitation reaction system of claim 1, wherein the maximum negative pressure of the negative pressure pump is-0.8 bar, and the maximum output pressure of the negative pressure pump outlet is 2-6bar.
5. The cathode material precursor coprecipitation reaction system of claim 1, wherein the filter assembly (23) comprises a filtrate tube fixed in the reaction kettle (21) and a filter element fixed on the filtrate tube at intervals, the filtrate tube comprises an outer ring tube (231) and an inner ring tube (232) arranged along the radial direction of the reaction kettle (21) from outside to inside, the outer ring tube (231) and the inner ring tube (232) are both externally connected with a filtrate system through the filtrate tube (11), and the outer ring tube (231) and the inner ring tube (232) are both sealed tubes.
6. The co-precipitation reaction system for precursors of positive electrode materials according to claim 5, wherein the outer ring tube (231) is externally connected with a clear liquid outlet system through a clear liquid outlet tube (11), and the inner ring tube (232) is connected and communicated with the clear liquid outlet tube (11) through a bent tube.
7. The cathode material precursor coprecipitation reaction system of claim 6, wherein the supernatant outlet pipe (11) is in communication with a filtrate outlet provided at the bottom of the reaction vessel (21).
8. The cathode material precursor coprecipitation reaction system of claim 5, wherein the inner ring tube (232) is disposed at a position higher than that of the outer ring tube (231).
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