CN110131982B - Vacuum drier suitable for drying lithium ion battery anode material and application method thereof - Google Patents
Vacuum drier suitable for drying lithium ion battery anode material and application method thereof Download PDFInfo
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- CN110131982B CN110131982B CN201910526783.XA CN201910526783A CN110131982B CN 110131982 B CN110131982 B CN 110131982B CN 201910526783 A CN201910526783 A CN 201910526783A CN 110131982 B CN110131982 B CN 110131982B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
- F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/041—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
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- Drying Of Solid Materials (AREA)
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Abstract
The invention discloses a vacuum dryer suitable for drying a lithium ion battery anode material and an application method thereof. This vacuum drying machine is through setting up first stirring rake and second stirring rake to set up through-hole and first open slot respectively on it, set up first open slot on the second stirring rake and can effectively improve the scattered effect of harrow to the material when stirring, set up the through-hole on the first stirring rake and can make the material on the open slot orbit upwards turn, improve the stirring dispersion effect. When the vacuum dryer is used for drying the lithium ion battery anode material particles, the stirring and dispersing uniformity can be effectively improved, and the drying efficiency is improved.
Description
Technical Field
The invention relates to the technical field of drying equipment, in particular to a vacuum dryer suitable for drying a lithium ion battery anode material and an application method thereof.
Background
At present, a disc type dryer, a vacuum rake type dryer, a double-cone vacuum dryer and the like are drying equipment widely used in the pharmaceutical, chemical, pesticide and food industries, and are also widely applied to the field of lithium ion power batteries. In order to ensure the quality of the high-nickel ternary lithium ion battery anode material, a vacuum drier is needed in the production process of the precursor raw material and the high-nickel ternary lithium ion battery anode material so as to ensure that the material is not introduced by foreign matters in the drier to react.
Patent document No. 201410610597.1 discloses a blade stirring vacuum dryer including a vertical cylinder, a stirring device, an air extraction device, and a heating device. The vertical cylinder is of a split structure and comprises a cylinder body and a cylinder cover, wherein the cylinder body is provided with a closed end, an open end and a side wall, a discharge hole is formed in the closed end close to the side wall, the cylinder cover is covered at the open end, and a feed inlet and an exhaust opening are formed in the cylinder cover. The stirring device is formed by connecting a driving mechanism, a main shaft, a stirring frame and a scraper blade in sequence, wherein the main shaft penetrates through the barrel cover and extends into the barrel, the stirring frame is arranged at the lower end of the main shaft, the scraper blade is arranged at the lower end of the stirring frame, the air exhaust device is arranged at the air exhaust port, and the heating device is coated on the barrel.
The vacuum dryer mainly has the following defects: (1) the stirring device adopts a form of a stirring frame, a cross arm and a scraper, the structure is complex, the stirring uniformity of the material is not enough during stirring, the uniformity of the material drying is inconsistent, and the drying time is long; (2) only one stirring motor is arranged, the rotating speed of the stirring motor is consistent in the drying process and the blanking process, in order to ensure the drying efficiency, the stirring rotating speed of the stirring motor is generally higher, and when the stirring motor is used for the lithium ion battery anode material, the higher drying rotating speed has dissociation effect on the anode material particles, so that the product quality is influenced; (3) the feed opening sets up under barrel closed end, has the risk of leaking the material, and the unloading valve structure is complicated, easy defective material.
In addition, in a conventional vacuum dryer for drying a lithium ion battery cathode material, a jacket-type heating and cooling chamber is generally arranged outside a cylinder, and a heating device and a cooling device are respectively arranged to be communicated with an inner cavity of the heating and cooling chamber. And (3) introducing a heating medium into the heating and cooling chamber through the heating device during drying, and introducing a cooling medium into the heating and cooling chamber after drying to cool the lithium ion battery anode material in the cylinder. The material cooling method needs to cool the dried anode material in the cylinder, and the production efficiency is affected.
Disclosure of Invention
The invention mainly aims to provide a vacuum drier suitable for drying a lithium ion battery anode material and an application method thereof, and at least solves the problems of poor stirring uniformity and long drying time of the vacuum drier in the prior art.
In order to achieve the above object, according to one aspect of the present invention, a vacuum dryer suitable for drying a lithium ion battery anode material is provided, which includes a barrel, a stirring device is disposed on the barrel, the stirring device includes a stirring driving mechanism, an output end of the stirring driving mechanism is connected to a stirring shaft extending into the barrel, a stirring paddle is mounted at a lower end of the stirring shaft, the stirring paddle includes a first stirring paddle and a second stirring paddle disposed along a circumferential direction of the stirring shaft, a through hole is formed in the first stirring paddle, and a first open slot is formed in a lower edge of the second stirring paddle.
Furthermore, the stirring paddle also comprises a third stirring paddle arranged along the circumferential direction of the stirring shaft, and a second open slot is formed in the lower edge of the third stirring paddle.
Further, the distance from the axis of the stirring shaft to the first open groove is not equal to the distance from the axis of the stirring shaft to the second open groove.
Further, the number of the second opening grooves is at least 7, and the at least 7 second opening grooves are arranged at equal intervals along the length direction of the third stirring paddle.
Furthermore, the number of the through holes is at least 3, and the at least 3 through holes are arranged at equal intervals along the length direction of the first stirring paddle; the number of the first open grooves is at least 4, and the at least 4 first open grooves are arranged at equal intervals along the length direction of the second stirring paddle.
Furthermore, the first stirring paddle, the second stirring paddle and the third stirring paddle are obliquely arranged at an included angle of 30-35 degrees relative to the bottom surface of the inner cavity of the cylinder body.
Furthermore, the included angles between the upper edges of the first stirring paddle, the second stirring paddle and the third stirring paddle and the horizontal plane are all 1-3 degrees.
Further, the gaps between the free ends of the first stirring paddle, the second stirring paddle and the third stirring paddle and the side wall of the cylinder body are all 5-15 mm.
Further, the gaps between the lower edges of the first stirring paddle, the second stirring paddle and the third stirring paddle and the bottom of the inner cavity of the cylinder body are all 3-5 mm.
Further, the barrel and the stirring shaft are made of stainless steel and are polished, and the first stirring paddle, the second stirring paddle and the third stirring paddle are sprayed.
Furthermore, an upper cover is arranged above the cylinder body, a vacuumizing port is arranged on the upper cover and is connected with a dust remover, and the dust remover has a back flushing function.
Furthermore, the stirring driving mechanism is a double-motor driving system which can be freely switched.
Furthermore, the dual-motor driving system comprises a first motor driving system and a second motor driving system, and the first motor driving system and the second motor driving system can drive the stirring shaft to rotate at different rotating speeds.
Further, the driving rotating speeds of the first motor driving system and the second motor driving system are different by at least five times.
Furthermore, the driving speed of the first motor driving system is controlled to be 0.5r/min-1r/min, and the driving speed of the second motor driving system is controlled to be 5r/min-10 r/min.
Further, the second motor driving system comprises a blanking motor and a main speed reducer, wherein the output end of the blanking motor is connected with the main speed reducer, and a rotating shaft of the main speed reducer is connected with the upper end of the stirring shaft; the first motor driving system comprises a stirring motor, a stirring speed reducer, a clutch and the second motor driving system; the output end of the stirring motor is connected with a stirring speed reducer, and the stirring speed reducer is connected with a blanking motor of the second motor driving system through a clutch.
Further, the lateral wall lower part of barrel is equipped with a unloading chamber, and vacuum drying machine still includes a ejection of compact cooling device, and ejection of compact cooling device includes:
the cooling furnace body is provided with a cooling feed inlet communicated with the blanking cavity, and the cooling feed inlet is communicated with a furnace cavity of the cooling furnace body;
the cooling and stirring device is arranged on the cooling furnace body and is used for stirring and turning over materials in the cooling furnace body;
the cooling furnace body is of a jacket type structure, a cooling interlayer used for cooling materials is arranged on the periphery of a furnace chamber of the cooling furnace body, and a cooling medium inlet and a cooling medium outlet which are respectively communicated with the inside of the cooling interlayer are arranged on the cooling furnace body.
Further, the cooling agitating device includes:
cooling the stirring motor;
the cooling stirring shaft is rotatably arranged in a furnace chamber of the cooling furnace body, a rotating shaft of the cooling stirring motor is connected with the cooling stirring shaft, the cooling furnace body is a horizontal furnace body, and the cooling stirring shaft is transversely arranged along the furnace chamber of the cooling furnace body;
and the cooling stirring blade is arranged on the cooling stirring shaft and is a helical ribbon blade.
Furthermore, the cooling medium inlet is arranged on the lower side of the cooling interlayer, the cooling medium outlet is arranged on the upper side of the cooling interlayer, the bottom of the cooling interlayer is also provided with a cooling medium exhaust port, and the cooling medium exhaust port is communicated with the inside of the cooling interlayer.
Furthermore, the cooling furnace body is also provided with an exhaust port which is communicated with the furnace chamber of the cooling furnace body; the top of the cooling furnace body is also provided with a cooling dust remover which is communicated with the furnace chamber of the cooling furnace body.
Furthermore, the bottom of the cooling furnace body is also provided with a weighing module for weighing the material of the cooling furnace body.
According to another aspect of the invention, an application method of the vacuum dryer is provided, the vacuum dryer is used for preparing and drying the lithium ion battery anode material, the lithium ion battery anode material is sent into the vacuum dryer for drying after the semi-finished product of the lithium ion battery anode material is prepared, in the drying process, the clutch is closed firstly, the blanking motor is closed, and the stirring paddle is driven to rotate at a slow speed through the stirring motor, the stirring speed reducer and the main speed reducer so as to dry the material; in the discharging process after drying, the clutch is loosened, the stirring motor is closed, and the stirring paddle is driven to rotate rapidly through the discharging motor and the main speed reducer so as to discharge.
By applying the technical scheme of the invention, the through hole is formed in the first stirring paddle, the first open slot is formed in the lower edge of the second stirring paddle, so that the first stirring paddle and the second stirring paddle which are different in shape are formed, and the raking and scattering effect on materials during stirring can be effectively improved through the arrangement of the first open slot; through the through holes formed in the first stirring paddle, materials on the track of the open slot can be turned upwards. This vacuum drying machine can effectively improve the stirring dispersion homogeneity of lithium ion battery cathode material granule through the special design of stirring rake structure, improves drying efficiency, shortens drying time.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, 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 view of a vacuum dryer according to embodiment 1 of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partially enlarged view of B in fig. 1.
Fig. 4 is a top view of fig. 1.
Fig. 5 is a schematic structural view of a first stirring paddle in the vacuum dryer according to embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a second stirring paddle in the vacuum dryer according to embodiment 1 of the present invention.
Fig. 7 is a schematic structural view of a third stirring blade in the vacuum dryer according to embodiment 1 of the present invention.
Fig. 8 is a schematic top view of the stirring paddle in the vacuum dryer according to embodiment 1 of the present invention.
Fig. 9 is a schematic structural view of a vacuum dryer according to embodiment 2 of the present invention.
Fig. 10 is a schematic structural view of a discharge cooling device in a vacuum dryer according to embodiment 2 of the present invention.
Fig. 11 is a left side view of the structure of fig. 10.
Fig. 12 is a schematic top view of fig. 10.
Wherein the figures include the following reference numerals:
10. a barrel; 11. an upper cover; 12. a vacuum pumping port; 13. a feed inlet; 14. a manhole; 15. a heating medium inlet; 16. a heating medium outlet; 20. a stirring drive mechanism; 21. a stirring motor; 22. a stirring speed reducer; 23. a clutch; 24. a blanking motor; 25. a main speed reducer; 30. a stirring shaft; 40. a stirring paddle; 41. a first stirring paddle; 42. a second stirring paddle; 43. a third stirring paddle; 50. a blanking cavity; 60. a blanking cylinder; 100. cooling the furnace body; 101. cooling the feed inlet; 102. a cooling and stirring device; 103. cooling the interlayer; 104. a cooling medium inlet; 105. a cooling medium outlet; 106. a cooling medium exhaust port; 107. an exhaust port; 108. cooling the dust remover; 109. a weighing module; 110. cooling the discharge hole; 411. a through hole; 421. a first open slot; 431. a second open slot; 1021. cooling the stirring motor; 1022. cooling the stirring shaft; 1023. the stirring blade was cooled.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather the intention is to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Example 1
Referring to fig. 1 to 8, an embodiment of a vacuum dryer suitable for drying a lithium ion battery cathode material according to the present invention includes a cylinder 10, an upper cover 11 is disposed above the cylinder 10, the upper cover 11 is provided with a vacuum pumping port 12, a feeding port 13 and a manhole 14, a jacket is disposed on an outer side of the cylinder 10, and the jacket is provided with a heating medium inlet 15 and a heating medium outlet 16 (the heating medium is steam or heat conducting oil). The stirring device is arranged on the cylinder body 10 and comprises a stirring driving mechanism 20, the output end of the stirring driving mechanism 20 is connected with a stirring shaft 30, the stirring shaft 30 extends into the cylinder body 10, and the lower end of the stirring shaft 30 is provided with a stirring paddle 40. The stirring paddle 40 includes a first stirring paddle 41, a second stirring paddle 42 and a third stirring paddle 43 uniformly distributed along the circumferential direction of the stirring shaft 30. The first stirring paddle 41 is provided with a through hole 411, the lower edge of the second stirring paddle 42 is provided with a first opening groove 421, the lower edge of the third stirring paddle 43 is provided with a second opening groove 431, and the distance from the axis of the stirring shaft 30 to the first opening groove 421 is not equal to the distance from the axis of the stirring shaft 30 to the second opening groove 431 (i.e., the positions of the first opening groove 421 and the second opening groove 431 are staggered, see fig. 8, and the dotted circle in fig. 8 indicates the distance from the axis to the first opening groove 421). The first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 all extend from the stirring shaft 30 to the inner side wall of the barrel 10.
In the vacuum dryer, the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 are different in shape, the first stirring paddle 41 is provided with the through hole 411, the lower edge of the second stirring paddle 42 is provided with the first open groove 421, the lower edge of the third stirring paddle 43 is provided with the second open groove 431, so that the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 are different in shape, and the scattering effect on materials during stirring can be effectively improved through the arrangement of the first open groove 421 and the second open groove 431; the distance from the axis of the stirring shaft 30 to the first open groove 421 is unequal to the distance from the axis of the stirring shaft 30 to the second open groove 431, so that the positions of the first open groove 421 and the second open groove 431 are staggered, the materials do not stay on the same track, and the raking and scattering effect is further improved; through opening the through-hole 411 on the first stirring rake 41, be favorable to making the material on the open slot orbit upwards turn over, improve the stirring dispersion effect. This vacuum drying machine can effectively improve the stirring dispersion homogeneity of lithium ion battery cathode material granule through the special design of stirring rake 40 structure, improves drying efficiency, shortens drying time.
Specifically, referring to fig. 5, 6 and 7, in the present embodiment, the number of the through holes 411 is at least 3, and the at least 3 through holes 411 are arranged at equal intervals along the length direction of the first stirring paddle 41; the number of the first opening grooves 421 is at least 4, and the at least 4 first opening grooves 421 are arranged at equal intervals along the length direction of the second stirring paddle 42; the number of the second opening grooves 431 is at least 7, and the at least 7 second opening grooves 431 are provided at equal intervals in the length direction of the third agitating blade 43. By adopting the structure design, the vacuum drier has better stirring and dispersing effects.
Referring to the included angle α in fig. 3, in the present embodiment, the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 are all inclined at an included angle of 30 ° to 35 ° with respect to the bottom surface of the inner cavity of the cylinder 10, if the inclined angle is too large, the stirring resistance is large, and if the inclined angle is too small, the material turning effect is affected.
Referring to the included angle β in fig. 2, in the present embodiment, the included angles between the upper edges of the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 and the horizontal plane are all 1 to 3 degrees, if the horizontal slopes of the upper edges of the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 are too large, the strength of the stirring paddles will be affected, if the horizontal slopes are too small, the stirring effect of the material will be affected, and the effect is best when the horizontal slopes are set to 1 to 3 degrees.
Referring to L1 in fig. 2, in the present embodiment, the gaps between the free ends of the first stirring paddle 41, the second stirring paddle 42, and the third stirring paddle 43 and the side wall of the cylinder 10 are all 5mm-15mm, if the gap between the free end and the side wall is too small, the requirement on the installation accuracy of the stirring paddles is high, the manufacturing difficulty is increased, and the material is extruded and abraded, and if the gap is too large, the stirring effect is adversely affected.
Referring to L2 in fig. 2, in the embodiment, the gaps between the lower edges of the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 and the bottom of the inner cavity of the cylinder 10 are all 3mm-5mm, if the gap between the lower edges of the first stirring paddle 41, the second stirring paddle 42 and the third stirring paddle 43 and the bottom of the inner cavity of the cylinder 10 is too large, the bottom residual materials are too much, the bottom residual materials cannot be discharged completely, if the gap is too small, the assembly precision is difficult to ensure, the materials are subjected to extrusion and abrasion, and the product quality is affected.
When the high-nickel ternary lithium ion battery anode material particles are dried, the stirring rotating speed is too high in a plurality of drying processes, on one hand, the magnetic substance of the material is increased, on the other hand, the material particles are dissociated to generate micro powder, and the product quality is influenced, so that a slower rotating speed is needed in the drying process; however, in the material discharging process, if the rotating speed is slow, the production efficiency is affected. The existing vacuum dryer is usually only provided with one driving motor, and the rotating speed of the motor needs to be adjusted and switched in the drying process and the discharging process, so that the existing vacuum dryer is very inconvenient.
Referring to fig. 1 and 4, in the present embodiment, the stirring driving mechanism 20 includes a stirring motor 21, an output end of the stirring motor 21 is connected to a stirring speed reducer 22, the stirring speed reducer 22 is connected to a blanking motor 24 through a clutch 23 (specifically, the clutch 23 is connected to a rotor of the blanking motor 24), an output end of the blanking motor 24 is connected to a main speed reducer 25, and a rotating shaft of the main speed reducer 25 is connected to an upper end of the stirring shaft 30. In the drying process, the clutch 23 is closed, the blanking motor 24 is stopped, and the stirring paddle 40 is driven to rotate at a slow speed by the stirring motor 21, the stirring speed reducer 22 and the main speed reducer 25 (at the moment, the clutch 23 drives the rotor of the blanking motor 24 to rotate together), so that the quality of material particles is ensured; in the discharging process, the clutch 23 is loosened, the stirring motor 21 stops, and the stirring paddle 40 is driven to rotate at a higher speed by the discharging motor 24 and the main speed reducer 25 so as to improve the discharging efficiency. Through setting up two driving motor, carry out switch control to two grades of stirring speed through clutch 23, not only guaranteed the granularity of material granule, avoided the material granule to dissociate, ensured the product quality, effectively improved production efficiency moreover. Tests show that the product quality can be ensured and the production efficiency can be improved by adopting two stirring speeds, wherein the stirring speed is controlled to be 0.5r/min-1r/min in the drying process, and the stirring speed is controlled to be 5r/min-10r/min in the blanking process.
In addition, the stirring driving mechanism 20 may also adopt a servo motor or a stepping motor, and an output shaft of the servo motor or the stepping motor is connected to the upper end of the stirring shaft 30. The stirring speed is controlled by a servo motor or a stepping motor, so that the stirring speed in the drying process is relatively low, and the stirring speed in the blanking process is relatively high. However, compared with the method of using the stirring motor 21, the blanking motor 24 and the clutch 23, the invention is more energy-saving, and therefore, the scheme of using the two driving motors is preferably adopted.
The existing vacuum dryer usually arranges the discharge hole under the bottom of the cylinder 10, so that the risk of material leakage exists in the material stirring process. In order to solve the above problem, referring to fig. 1 and 4, in the present embodiment, a discharging chamber 50 is provided at a lower portion of a sidewall of the cylinder 10, and a discharging cylinder 60 for opening or closing the discharging chamber 50 is provided in the discharging chamber 50. So set up, can effectively reduce the risk that the material leaks the material at the stirring in-process to, open or close unloading chamber 50 through unloading cylinder 60, simple structure is difficult to the condition of putty.
In order to reduce the risk of introducing magnetic substances, in the present embodiment, the cylinder 10 and the stirring shaft 30 are preferably made of stainless steel, and are subjected to surface polishing treatment; the first stirring paddle 41, the second stirring paddle 42, and the third stirring paddle 43 are all subjected to surface spraying treatment. By the arrangement, the introduction of magnetic substances can be effectively avoided, and the product quality is improved.
In this embodiment, a dust remover (not shown) is connected to the vacuum port 12, and the dust remover is a dust remover with a blowback function. Moisture generated in the stirring and drying process is pumped out by the vacuum pumping port 12, dust in the drying process is collected by the dust remover, and the dust falls into the barrel 10 in a back flushing manner.
The working process of the vacuum drier is as follows:
starting the stirring motor 21, closing the clutch 23, stopping the blanking motor 24, closing the blanking cylinder 60, allowing the material to enter from the feed port 13, and allowing the steam (or heat conduction oil) to enter from the heating medium inlet 15; after the materials are fed, the feeding hole 13 is closed, the vacuum pumping is started, the stirring paddle 40 is driven by the stirring motor 21 to rotate, and the materials are stirred and dried; moisture generated in the drying process is discharged from the vacuumizing port 12, dust in the drying process is collected by a dust remover, and the dust falls into the barrel 10 in a back flushing manner; after the drying is finished, the blanking cylinder 60 is opened, the stirring motor 21 is stopped, the clutch 23 is released, the blanking motor 24 is started, the material is discharged from the blanking cavity 50, after the material is discharged, the blanking cylinder 60 is closed, and then the drying of the material of the next batch is carried out.
Practical application shows that 1000 kg of high-nickel washing water lithium ion battery cathode material particles are dried by the conventional vacuum dryer for about 6 hours generally, but the drying efficiency is remarkably improved by using the vacuum dryer of the invention for about 3 hours.
Example 2
Referring to fig. 9 to 12, an embodiment of the vacuum dryer of the present invention is suitable for drying a positive electrode material of a lithium ion battery. The main structure of the vacuum dryer is the same as that of the vacuum dryer of embodiment 1. Compared with embodiment 1, the main difference of the vacuum dryer of the present embodiment is that the vacuum dryer further includes an output cooling device, and the output cooling device includes a cooling furnace body 100 and a cooling stirring device 102. Wherein, the cooling furnace body 100 is provided with a cooling feed inlet 101 communicated with the blanking cavity 50, and the cooling feed inlet 101 is communicated with the furnace cavity of the cooling furnace body 100; the cooling and stirring device 102 is arranged on the cooling furnace body 100 and is used for stirring and turning over the materials in the cooling furnace body 100; the cooling furnace body 100 is of a jacketed structure, a cooling interlayer 103 for cooling materials is arranged on the periphery of a furnace chamber of the cooling furnace body 100, and a cooling medium inlet 104 and a cooling medium outlet 105 which are respectively communicated with the inside of the cooling interlayer 103 are arranged on the cooling furnace body 100.
When the vacuum dryer is used, the dried lithium ion battery anode material in the vacuum dryer directly enters the cooling furnace body 100 from the blanking cavity 50, and is cooled by the cooling medium in the cooling interlayer 103 under the stirring action of the cooling stirring device 102. Compared with the existing mode of cooling the material in the cylinder 10 of the vacuum dryer, the vacuum dryer of the embodiment realizes that the material is cooled outside the cylinder 10 of the vacuum dryer by arranging the discharging cooling device at the downstream of the vacuum dryer; so, the material after the drying is accomplished can directly be expected ejection of compact cooling device and cool off, and need not to wait for the cooling in barrel 10, can throw the material in the barrel 10 and carry out the drying of next batch material, has improved vacuum drying machine's production efficiency greatly.
Specifically, referring to fig. 9 to 12, in the present embodiment, the cooling agitation device 102 includes a cooling agitation motor 1021, a cooling agitation shaft 1022, and a cooling agitation blade 1023. Wherein, the cooling stirring motor 1021 is installed outside the cooling furnace body 100; the cooling stirring shaft 1022 is rotatably installed in a furnace cavity of the cooling furnace body 100, a rotating shaft of the cooling stirring motor 1021 is connected with the cooling stirring shaft 1022, the cooling stirring shaft 1022 is transversely arranged along the furnace cavity of the cooling furnace body 100, and the cooling furnace body 100 is a horizontal furnace body; the cooling agitating blade 1023 is installed on the cooling agitating shaft 1022, and the cooling agitating blade 1023 is a ribbon blade. By adopting the cooling stirring device 102, the cooling stirring shaft 1022 is transversely arranged in the horizontal cooling furnace body 100, the helical cooling stirring blades 1023 are adopted, and after the dried lithium ion battery anode material enters the cooling furnace body 100, the lithium ion battery anode material is continuously turned over in the horizontal cooling furnace body 100 under the action of the helical cooling stirring blades 1023, so that the contact chance of the material and the cooling interlayer 103 is effectively improved, and the cooling efficiency is improved.
Referring to fig. 9 to 12, in the present embodiment, the cooling medium inlet 104 is provided on the lower side of the cooling jacket 103, and the cooling medium outlet 105 is provided on the upper side of the cooling jacket 103. By the arrangement, the cooling medium can enter and exit from the lower part and can be filled in the whole cooling interlayer 103, so that a good cooling effect is ensured. Further, a cooling medium exhaust port 106 is provided at the bottom of the cooling jacket 103, and the cooling medium exhaust port 106 communicates with the inside of the cooling jacket 103. When the discharge cooling device is maintained or stopped, the cooling medium in the cooling interlayer 103 can be discharged out through the cooling medium exhaust port 106.
Referring to fig. 9 to 12, in the present embodiment, the cooling furnace body 100 is further provided with an exhaust port 107, the exhaust port 107 is communicated with the furnace chamber of the cooling furnace body 100, and the bottom of the cooling furnace body 100 is further provided with a cooling discharge port 110. After the material is cooled, the air outlet 107 is opened to make the air pressure in the cooling furnace body 100 the same as the external air pressure, and the material can be conveniently discharged by opening the cooling discharge port 110.
In order to remove the dust generated by the positive electrode material during the material cooling process, referring to fig. 9 to 12, a cooling dust collector 108 is further installed on the top of the cooling furnace body 100, and the cooling dust collector 108 is communicated with the furnace chamber of the cooling furnace body 100. In the material cooling process, the generated anode material dust can be removed through the cooling dust remover 108, and the pollution of the dust to the surrounding environment is avoided.
In order to weigh the lithium ion battery cathode material, referring to fig. 1, 2 and 4, in this embodiment, a weighing module 109 is further disposed at the bottom of the cooling furnace body 100. The cooling furnace body 100 is integrally mounted on the weighing module 109. The weighing module 109 can conveniently weigh the materials in the cooling furnace body 100.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 protection scope of the present invention.
Claims (12)
1. The vacuum dryer suitable for drying the lithium ion battery anode material comprises a barrel body (10), wherein a stirring device is arranged on the barrel body (10), the stirring device comprises a stirring driving mechanism (20), the output end of the stirring driving mechanism (20) is connected with a stirring shaft (30) extending into the barrel body (10), and a stirring paddle (40) is installed at the lower end of the stirring shaft (30), and is characterized in that the stirring paddle (40) comprises a first stirring paddle (41) and a second stirring paddle (42) which are arranged along the circumferential direction of the stirring shaft (30), a through hole (411) is formed in the first stirring paddle (41), and a first open groove (421) is formed in the lower edge of the second stirring paddle (42); the stirring paddle (40) further comprises a third stirring paddle (43) arranged along the circumferential direction of the stirring shaft (30), and a second open groove (431) is formed in the lower edge of the third stirring paddle (43); the distance from the axis of the stirring shaft (30) to the first open groove (421) is not equal to the distance from the axis of the stirring shaft (30) to the second open groove (431); the first stirring paddle (41), the second stirring paddle (42) and the third stirring paddle (43) are all obliquely arranged at an included angle of 30-35 degrees relative to the bottom surface of the inner cavity of the barrel body (10); the clearance between the lower edge of the first stirring paddle (41), the lower edge of the second stirring paddle (42) and the lower edge of the third stirring paddle (43) and the bottom of the inner cavity of the barrel body (10) is 3-5 mm.
2. The vacuum dryer according to claim 1, wherein the number of the second opening grooves (431) is at least 7, and at least 7 of the second opening grooves (431) are equally spaced along the length direction of the third agitating paddle (43).
3. The vacuum dryer according to claim 1, wherein the number of the through holes (411) is at least 3, and at least 3 of the through holes (411) are arranged at equal intervals along the length direction of the first stirring paddle (41); the number of the first opening grooves (421) is at least 4, and the first opening grooves (421) are arranged at equal intervals along the length direction of the second stirring paddle (42).
4. The vacuum dryer according to claim 1, characterized in that the upper edges of the first, second and third paddles (41, 42, 43) are all at an angle of 1 ° to 3 ° to the horizontal.
5. The vacuum dryer according to claim 1, characterized in that the gaps between the free ends of the first, second and third paddles (41, 42, 43) and the side wall of the cylinder (10) are each 5-15 mm.
6. The vacuum drying machine according to claim 1, characterized in that an upper cover (11) is arranged above the cylinder (10), a vacuum-pumping port (12) is arranged on the upper cover (11), the vacuum-pumping port (12) is connected with a dust remover, and the dust remover is a dust remover with a back-blowing function.
7. The vacuum dryer according to claim 1, wherein the stirring drive mechanism (20) is a freely switchable two-motor drive system.
8. The vacuum dryer according to claim 7, wherein the dual motor drive system comprises a first motor drive system and a second motor drive system, and the first motor drive system and the second motor drive system can drive the stirring shaft (30) to rotate at different rotation speeds.
9. The vacuum dryer according to claim 8, wherein the driving speed of the first motor driving system is controlled to be 0.5r/min-1r/min, and the driving speed of the second motor driving system is controlled to be 5r/min-10 r/min.
10. The vacuum drying machine according to claim 8, wherein the second motor driving system comprises a blanking motor (24) and a main speed reducer (25), the output end of the blanking motor (24) is connected with the main speed reducer (25), and the rotating shaft of the main speed reducer (25) is connected with the upper end of the stirring shaft (30); the first motor driving system comprises a stirring motor (21), a stirring speed reducer (22), a clutch (23) and the second motor driving system; the output end of the stirring motor (21) is connected with the stirring speed reducer (22), and the stirring speed reducer (22) is connected with the blanking motor (24) of the second motor driving system through the clutch (23).
11. Vacuum dryer according to any of claims 1 to 10,
the lateral wall lower part of barrel (10) is equipped with a unloading chamber (50), vacuum drying machine still includes a ejection of compact cooling device, ejection of compact cooling device includes:
the cooling furnace body (100) is provided with a cooling feed inlet (101) communicated with the blanking cavity (50), and the cooling feed inlet (101) is communicated with a furnace cavity of the cooling furnace body (100);
the cooling and stirring device (102) is arranged on the cooling furnace body (100), and the cooling and stirring device (102) is used for stirring and turning over materials in the cooling furnace body (100);
the cooling furnace body (100) is of a jacket type structure, a cooling interlayer (103) for cooling materials is arranged on the periphery of a furnace chamber of the cooling furnace body (100), and a cooling medium inlet (104) and a cooling medium outlet (105) which are respectively communicated with the inside of the cooling interlayer (103) are arranged on the cooling furnace body (100);
the cooling agitation apparatus (102) includes:
a cooling stirring motor (1021);
the cooling stirring shaft (1022) is rotatably installed in a furnace chamber of the cooling furnace body (100), a rotating shaft of the cooling stirring motor (1021) is connected with the cooling stirring shaft (1022), the cooling furnace body (100) is a horizontal furnace body, and the cooling stirring shaft (1022) is transversely arranged along the furnace chamber of the cooling furnace body (100);
a cooling stirring blade (1023) installed on the cooling stirring shaft (1022), and the cooling stirring blade (1023) is a helical blade;
the bottom of the cooling furnace body (100) is also provided with a weighing module (109) for weighing the materials of the cooling furnace body (100).
12. The application method of the vacuum dryer according to claim 10, characterized in that the vacuum dryer is used for preparing and drying the lithium ion battery anode material, the lithium ion battery anode material is sent into the vacuum dryer for drying after the semi-finished product of the lithium ion battery anode material is prepared, during the drying process, the clutch (23) is closed, the blanking motor (24) is closed, and the stirring paddle (40) is driven to rotate at a slow speed through the stirring motor (21), the stirring speed reducer (22) and the main speed reducer (25) so as to dry the material; in the discharging process after drying, the clutch (23) is loosened, the stirring motor (21) is turned off, and the stirring paddle (40) is driven to rotate rapidly through the blanking motor (24) and the main speed reducer (25) so as to discharge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018115266330 | 2018-12-13 | ||
| CN201811526633.0A CN109668404A (en) | 2018-12-13 | 2018-12-13 | Vacuum drier suitable for dry anode material for lithium-ion batteries |
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| CN110131982A CN110131982A (en) | 2019-08-16 |
| CN110131982B true CN110131982B (en) | 2020-07-17 |
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| CN201811526633.0A Pending CN109668404A (en) | 2018-12-13 | 2018-12-13 | Vacuum drier suitable for dry anode material for lithium-ion batteries |
| CN201910526783.XA Active CN110131982B (en) | 2018-12-13 | 2019-06-18 | Vacuum drier suitable for drying lithium ion battery anode material and application method thereof |
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| CN201811526633.0A Pending CN109668404A (en) | 2018-12-13 | 2018-12-13 | Vacuum drier suitable for dry anode material for lithium-ion batteries |
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| CN111921434B (en) * | 2020-07-21 | 2022-11-29 | 合肥通用机械研究院有限公司 | Integrated production process for ternary material |
| CN114087869A (en) * | 2021-12-31 | 2022-02-25 | 湖南宏工智能科技有限公司 | Stirring paddle structure of dryer |
| CN114593562B (en) * | 2022-04-06 | 2024-04-19 | 秦皇岛曼国装备科技有限公司 | Material drying device and material drying treatment method |
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| JP3612114B2 (en) * | 1995-07-17 | 2005-01-19 | リンナイ株式会社 | Drying equipment |
| JP2000180057A (en) * | 1998-12-09 | 2000-06-30 | Tokimec Inc | Agitation structure of carbonizer |
| JP2000213868A (en) * | 1999-01-25 | 2000-08-02 | Matsushita Electric Ind Co Ltd | Dryer fro water-containing matter |
| JP2001205067A (en) * | 2000-01-27 | 2001-07-31 | Shinko Pantec Co Ltd | Agitation blade and filtering/drying apparatus |
| WO2007129340A1 (en) * | 2006-05-10 | 2007-11-15 | Comber S.R.L. | Conical-base drier |
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| TW317508B (en) * | 1994-08-10 | 1997-10-11 | Kanei Masao | |
| CN1520924A (en) * | 2003-02-12 | 2004-08-18 | �Ҵ���˾ | Powder pugmill system |
| CN104359292A (en) * | 2014-11-03 | 2015-02-18 | 常州一步干燥设备有限公司 | Stirring vacuum drying machine of scraping plate |
| CN205718214U (en) * | 2016-05-24 | 2016-11-23 | 淮安市欣佳尼龙有限公司 | A kind of vacuum drier |
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| CN109668404A (en) | 2019-04-23 |
| CN110131982A (en) | 2019-08-16 |
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Address after: 17-8 Lu Gu Lu Tian Lu, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee after: BASF Shanshan battery material Co.,Ltd. Address before: 17-8 Lu Gu Lu Tian Lu, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee before: Hunan Shanshan Energy Technology Co.,Ltd. Address after: 17-8 Lu Gu Lu Tian Lu, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee after: Hunan Shanshan Energy Technology Co.,Ltd. Address before: 17-8 Lu Gu Lu Tian Lu, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee before: HUNAN SHANSHAN ENERGY TECHNOLOGY Co.,Ltd. |
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