CN211204836U

CN211204836U - Drying furnace

Info

Publication number: CN211204836U
Application number: CN201920584403.3U
Authority: CN
Inventors: 李月娃
Original assignee: Shenzhen Shancun United Industrial Co ltd
Current assignee: Shenzhen Shancun United Industrial Co ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-08-07
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a drying furnace, which comprises a main frame, a frame table-board arranged in the main frame and a rotary kiln arranged on the frame table-board, wherein a front end cover and a rear end cover body are respectively arranged at the front end and the rear end of the rotary kiln, and a rotary sealing ring is arranged between the front end cover, the rear end cover body and a kiln cavity of the rotary kiln; the kiln comprises a kiln cavity body and is characterized in that a plurality of heaters are arranged on the outer side of the kiln cavity body, heat preservation layers are arranged on the outer side of the heaters, rotating rings are arranged at the front end and the rear end of the kiln cavity body respectively, the kiln cavity body rotates on the rotating rings through a chain transmission group, front end helical blades and rear end helical blades are arranged on the inner walls of the two ends of the kiln cavity body respectively, a feeding device and an exhaust pipeline are arranged on a front end cover, a cooler is connected to the lower end of a rear end cover body, and a. The rotary furnace can realize the drying treatment of the lithium battery cathode material, is carried out automatically, and meets the process requirements of the lithium battery cathode material.

Description

Drying furnace

Technical Field

The utility model relates to a lithium cell production and processing equipment technical field, in particular to drying furnace.

Background

At present, the lithium ion battery industry at home and abroad has a good development prospect, and the lithium ion battery is generally applied to portable electrical appliances such as a portable computer, a camera and mobile communication due to the unique performance advantages of the lithium ion battery. The high-capacity lithium ion battery developed at present is tried out in electric automobiles, is expected to become one of main power sources of the electric automobiles in the 21 st century, and is applied to artificial satellites, aerospace and energy storage. With the shortage of energy and the environmental pressure of the world. Lithium batteries are widely applied to the electric vehicle industry at present, and particularly, the development and application of the lithium battery industry are promoted due to the appearance of lithium iron phosphate material batteries.

The lithium ion battery is a secondary battery (rechargeable battery) which mainly works by means of lithium ions moving between a positive electrode and a negative electrode, L i + is inserted and extracted back and forth between the two electrodes in the charging and discharging process, L i + is extracted from the positive electrode and inserted into the negative electrode through an electrolyte during charging, the negative electrode is in a lithium-rich state, and the battery generally adopts a material containing lithium elements as the electrode during discharging, in order to ensure high quality of the lithium battery, strict control needs to be carried out on the production environment of each process in the production process of the lithium battery.

The existing drying equipment can primarily dry the pasty cathode carbon material, but due to the strong oxidizability, the pasty cathode carbon material is easily oxidized by air in the drying process, so that the quality of the cathode material is not high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a drying furnace can realize lithium battery negative electrode material's drying process, and the automation goes on, satisfies lithium battery negative electrode material's technological requirement.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a drying furnace comprises a main frame, a frame table top arranged in the main frame and a rotary kiln arranged on the frame table top, wherein a front end cover and a rear end cover body are respectively arranged at the front end and the rear end of the rotary kiln, and rotary sealing rings are arranged between the front end cover, the rear end cover body and a kiln cavity of the rotary kiln; the kiln comprises a kiln cavity body, a plurality of heaters, a heat insulation layer, a transmission ring, a front end spiral blade, a rear end spiral blade, a feeding device, an exhaust pipeline, a cooler and a discharge port, wherein the heaters are arranged on the outer side of the kiln cavity body; a speed reducer connected with the chain transmission set is arranged on the main frame below the table surface of the frame, the input end of the speed reducer is connected with a first rotary driving motor, and the first rotary driving motor drives the kiln cavity to rotate forwards and backwards to respectively form the feeding rotating direction and the discharging rotating direction of the rotary kiln; the inclined direction of the front end helical blade is the same as the feeding rotating direction, and the inclined direction of the rear end helical blade is the same as the discharging rotating direction.

Furthermore, rolling rings are arranged on the table surface of the rack, two groups of rolling rings are respectively arranged at the front end and the rear end of the kiln cavity, and the rotating rings respectively rotate on one group of rolling rings.

Optionally, a synchronous rotating screw is arranged between the rolling rings in one group, and the synchronous rotating screw enables the two rolling rings to keep the same rotating speed.

Optionally, an inclined ladder is further arranged on one side of the main frame, and the main frame enters the table top of the rack through the inclined ladder.

Furthermore, the heat preservation layer is fixed on the table surface of the rack through a rotary kiln support, two ends of the kiln cavity are supported and arranged in the heat preservation layer through rotation, and the heaters are arranged on the inner wall of the heat preservation layer and close to the outer wall of the kiln cavity.

Furthermore, the lower end of the rotary kiln support is provided with a rotary kiln adjusting screw rod which is used for adjusting the inclination angle of the rotary kiln.

Optionally, a plurality of temperature sensors are arranged along the length direction of the kiln cavity, and the temperature sensors penetrate through the heat insulation layer and enter the space between the heat insulation layer and the kiln cavity.

Optionally, the heat preservation with the space between the kiln cavity is provided with cooling nozzle, cooling nozzle is connected with outside air-cooler for carry out rapid cooling to the kiln cavity.

Furthermore, the feeding device comprises a first spiral feeder and a second spiral feeder, the hoppers of the first spiral feeder and the second spiral feeder are respectively added with materials, the discharge end of the first spiral feeder is connected with the hopper of the second spiral feeder, and the discharge end of the second spiral feeder is communicated with the kiln cavity.

Optionally, a plurality of bins are arranged corresponding to the feeding hopper of the first screw feeder and used for placing the negative electrode material to be dried.

Further, an air heater is further arranged on the main frame and communicated with the kiln cavity through the rear end cover body.

Furthermore, the exhaust pipeline is connected with a bag-type dust collector, and a row of wet fans are installed at the rear end of the bag-type dust collector.

Furthermore, a crushing roller pair is arranged between the cooler and the discharge hole and is connected to a crushing driving motor through a screw.

Adopt above-mentioned technical scheme, through setting up the rotary kiln, the leakproofness of rotary kiln is good, can carry out rapid heating through the heater, front end helical blade and rear end helical blade that set up opposite direction on the kiln cavity, keep the independence when making kiln cavity business turn over material, can discharge cathode material's moisture fast through exhaust duct, carry out hot-blast washing through air heater in to the kiln cavity in addition, make cathode material can not remain at the kiln cavity, set up the cooler through rear end cover body lower extreme, can cool off fast to cathode material after the drying, then break, enter into next process, degree of automation is high, can obtain the cathode material who accords with the technological requirement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a front view of the drying oven of the present invention;

FIG. 2 is a side view of the drying oven of the present invention;

in the figure, 1-main frame, 2-frame table, 3-inclined ladder, 4-rotary kiln, 41-kiln cavity, 42-heater, 43-insulating layer, 44-temperature sensor, 45-rotating ring, 46-rotating support, 47-front end helical blade, 48-rear end helical blade and 49-rotary kiln support; 5-rolling ring, 6-first screw feeder, 7-second screw feeder, 8-front end cover, 9-rotary sealing ring, 10-rear end cover, 11-chain transmission set, 12-speed reducer, 13-first rotary driving motor, 14-second rotary driving motor, 15-air heater, 16-exhaust pipeline, 17-bag dust remover, 18-dehumidifying fan, 19-cooler, 20-crushed material pair roller, 21-crushed material driving motor, 22-discharge port, 23-rotary kiln adjusting screw, 24-cooling nozzle and 25-synchronous rotating screw; 30-bin.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1-2, an embodiment of the present invention provides a drying furnace, which includes a main frame 1, a frame table 2 disposed in the main frame 1, and a rotary kiln 4 mounted on the frame table 2, wherein a front end cover 8 and a rear end cover 10 are respectively disposed at front and rear ends of the rotary kiln 4, and a rotary seal ring 9 is disposed between the front end cover 8, the rear end cover 10, and a kiln cavity 41 of the rotary kiln 4; the kiln cavity 41 outside is provided with a plurality of heaters 42, the heater 42 outside is provided with heat preservation 43, both ends are provided with swivel becket 45 respectively around the kiln cavity 41, kiln cavity 41 is in through a chain drive group 11 drive rotate on the swivel becket 45, kiln cavity 41 both ends inner wall is provided with front end helical blade 47 and rear end helical blade 48 respectively, be provided with feed arrangement and exhaust duct 16 on the front end housing 8, a cooler 19 is connected to rear end cover 10 lower extreme, cooler 19 lower extreme sets up discharge gate 22.

Specifically, the cooler 19 is composed of a cooling cavity and a cooling plate arranged in the cooling cavity, the cooling plate can introduce 10-degree chilled water, and the dried high-temperature negative electrode material is cooled by heat exchange when passing through the cooling plate.

Specifically, a speed reducer 12 connected with the chain transmission set 11 is arranged on the main frame 1 below the frame table top 2, the input end of the speed reducer 12 is connected with a first rotary driving motor 13, and the first rotary driving motor 13 drives the kiln cavity 41 to rotate forwards and backwards to form the feeding rotation direction and the discharging rotation direction of the rotary kiln 4 respectively; the inclination direction of the front end helical blade 47 is the same as the feeding rotation direction, and the inclination direction of the rear end helical blade 48 is the same as the discharging rotation direction.

Optionally, the input end of the speed reducer 12 is further connected to a second rotary driving motor 14, and the second rotary driving motor 14 is used as a standby motor for the first rotary driving motor 13.

Wherein, the rack table-board 2 is provided with rolling rings 5, two groups of rolling rings 5 are respectively arranged at the front end and the rear end of the kiln cavity 41, and the rotating rings 45 respectively rotate on one group of rolling rings 5.

Optionally, a synchronous rotating screw 25 is arranged between a group of the rolling rings 5, and the synchronous rotating screw 25 enables the two rolling rings 5 to keep the same rotating speed.

Optionally, an inclined ladder 3 is further arranged on one side of the main frame 1, and the main frame enters the machine frame table top 2 through the inclined ladder 3.

The heat-insulating layer 43 is fixed on the rack table top 2 through a rotary kiln support 49, two ends of the kiln cavity 41 are arranged in the heat-insulating layer 43 through rotary supports 46, and the heaters 42 are arranged on the inner wall of the heat-insulating layer 43 and close to the outer wall of the kiln cavity 41. The drying process temperature is set at 200 degrees and can be achieved by using 4 groups of 12KW heaters uniformly distributed along the length of the kiln chamber 41.

Wherein, the lower end of the rotary kiln bracket 49 is provided with a rotary kiln adjusting screw 23 which is used for adjusting the inclination angle of the rotary kiln.

Optionally, a plurality of temperature sensors 44 are disposed along the length direction of the kiln chamber 41, and the temperature sensors 44 penetrate through the insulating layer 43 and enter the space between the insulating layer 43 and the kiln chamber 41.

Optionally, the space between the heat insulation layer 43 and the kiln cavity 41 is provided with a cooling nozzle 24, and the cooling nozzle 24 is connected with an external air cooler for rapidly cooling the kiln cavity 41.

Specifically, the feeding device comprises a first spiral feeder 6 and a second spiral feeder 7, the first spiral feeder 6 and the hopper of the second spiral feeder 7 are respectively added with materials, the discharge end of the first spiral feeder 6 is connected with the hopper of the second spiral feeder 7, and the discharge end of the second spiral feeder 7 is communicated with the kiln cavity 41. The first spiral feeder 6 and the second spiral feeder 7 are used for feeding different materials respectively, and mixing is carried out in the feeding process.

Optionally, a plurality of bins 30 are provided corresponding to the feeding hopper of the first screw feeder 6 for placing the negative electrode material to be dried.

An air heater 15 is further arranged on the main frame 1, and the air heater 15 is communicated with the kiln cavity 41 through the rear end cover body 10. Air heater 15 is to kiln cavity leading-in hot-blast, and hot-blast temperature is 200 degrees, and air heater 15's power is 7.5KW, and hot-blast can be with negative pole material and other impurity heating to evaporation vaporization, then discharges through exhaust duct 16, keeps kiln cavity 41's cleanness, avoids often opening kiln cavity 41 and washs, promotes production efficiency.

The exhaust pipeline 16 is connected with a bag-type dust collector 17, and a row of wet fans 18 are installed at the rear end of the bag-type dust collector 17.

Wherein a crushing roller pair 20 is further arranged between the cooler 19 and the discharge port 22, and the crushing roller pair 20 is connected to a crushing drive motor 21 through a screw.

Specifically, the wet negative electrode material A, B in the bin 30 is added into the hopper through a pipeline, a manual or other device, the screw feeder is started, the rotary driving motor drives the rotary kiln to rotate along the feeding direction, the rotating speed can be set to 5rpm, in addition, the rotary kiln is integrally provided with an inclination angle of 1.5 degrees towards the rear end through a rotary kiln adjusting screw, the heater is started to work, the outer wall of the kiln cavity is provided with a temperature of 200 degrees, the temperature of the outer wall of the kiln cavity can be kept relatively constant through a temperature sensor and a cooling nozzle, the length of the kiln cavity is set to be 4m, the negative electrode material passes through the kiln cavity at a speed V of 0.585m/min, so that the negative electrode material stays in the kiln cavity for 6.84min, thereby the drying treatment is rapidly completed, the exhaust pipeline rapidly exhausts moisture evaporated from the negative electrode material, when the negative electrode material reaches the rear end of the kiln cavity, the rotary driving motor, under the action of the rear end spiral blade, the negative electrode material enters the rear end cover body, falls into the cooler, enters the crushing roller pair after being cooled, is crushed and then is discharged from the discharge port, and enters the next procedure.

In addition, during feeding drying treatment, the moisture exhausting fan continuously exhausts air to keep a micro-negative pressure state in the kiln cavity, so that the material cannot leak, and after the drying treatment is finished, the air heater pours hot air into the kiln cavity to form a micro-high pressure state in the kiln cavity, so that the volatilized material is rapidly discharged.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "row", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present patent application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," "secured," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present patent application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims

1. A drying furnace is characterized by comprising a main frame, a frame table top arranged in the main frame and a rotary kiln arranged on the frame table top, wherein a front end cover and a rear end cover body are respectively arranged at the front end and the rear end of the rotary kiln, and rotary sealing rings are arranged between the front end cover, the rear end cover body and a kiln cavity of the rotary kiln; the kiln comprises a kiln cavity body, a plurality of heaters, a heat insulation layer, a rotary ring, a feeding device, an exhaust pipeline, a cooler and a discharge port, wherein the heaters are arranged on the outer side of the kiln cavity body, the heat insulation layer is arranged on the outer side of the heaters, the rotary ring is respectively arranged at the front end and the rear end of the kiln cavity body, the kiln cavity body is driven by a chain transmission set to rotate on the rotary ring, the inner walls of the two ends of the kiln cavity body are respectively provided with a front end helical blade and a rear end helical blade, the feeding device and the exhaust pipeline; a speed reducer connected with the chain transmission set is arranged on the main frame below the table surface of the frame, the input end of the speed reducer is connected with a first rotary driving motor, and the first rotary driving motor drives the kiln cavity to rotate forwards and backwards to respectively form the feeding rotating direction and the discharging rotating direction of the rotary kiln; the inclined direction of the front end helical blade is the same as the feeding rotating direction, and the inclined direction of the rear end helical blade is the same as the discharging rotating direction.

2. The kiln of claim 1, wherein the frame deck has a plurality of roller rings, two roller rings being disposed at the front and rear ends of the kiln chamber, respectively, and the rotary ring being rotatable on each of the plurality of roller rings.

3. The drying furnace as claimed in claim 1, wherein the heat insulating layer is fixed on the top surface of the frame through a kiln support, two ends of the kiln chamber are supported by the heat insulating layer through rotation, and the heaters are arranged on the inner wall of the heat insulating layer and close to the outer wall of the kiln chamber.

4. The drying furnace as claimed in claim 3, wherein the lower end of the rotary kiln support is provided with a rotary kiln adjusting screw for adjusting the inclination angle of the rotary kiln.

5. The drying furnace as claimed in claim 3, wherein a plurality of temperature sensors are arranged along the length direction of the kiln cavity, and the temperature sensors penetrate through the heat-insulating layer and enter a space between the heat-insulating layer and the kiln cavity; and a cooling nozzle is arranged in the space between the heat-insulating layer and the kiln cavity and is connected with an external air cooler.

6. The drying furnace of claim 1, wherein the feeding device comprises a first screw feeder and a second screw feeder, the hoppers of the first screw feeder and the second screw feeder are respectively fed with materials, the discharge end of the first screw feeder is connected with the hopper of the second screw feeder, and the discharge end of the second screw feeder is communicated with the kiln cavity.

7. The kiln of claim 1, wherein an air heater is also provided on the main frame and communicates with the kiln chamber through the rear end housing.

8. The drying furnace according to claim 1, wherein the exhaust pipeline is connected with a bag-type dust remover, and a moisture exhaust fan is arranged at the rear end of the bag-type dust remover.

9. The kiln as defined in claim 1, further comprising a pinch roll disposed between said cooler and said exit port, said pinch roll being connected to a pinch drive motor by a screw.