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CN-116499240-B - Calcining device and air inlet method of calcining device

CN116499240BCN 116499240 BCN116499240 BCN 116499240BCN-116499240-B

Abstract

The application provides a calcination device and an air inlet method of the calcination device, wherein the calcination device comprises a kiln, a sagger arranged in the kiln, a side air inlet and a roller way are further arranged in the kiln, the roller way is used for driving the sagger to move along a first direction, the sagger comprises two support legs which are arranged at intervals along the first direction, an opening communicated with the inside of the sagger is formed between the two support legs, and the side air inlet is configured to be opened when the side air inlet corresponds to the opening in the first direction and closed when the side air inlet corresponds to the support legs. The application can directly supply the gas introduced from the side gas inlet to the ternary material in the sagger, reduces the waste of the gas, improves the utilization rate of the gas, is favorable for replacing the waste gas gathered near the sagger, and improves the gas fluidity in the sagger, thereby improving the calcination quality of the ternary material.

Inventors

  • ZHENG MINGZHAO
  • SUN WEILI
  • PENG HAILONG
  • ZHENG CHUNLONG
  • Tu Jianhai
  • LIU YONGXIAO

Assignees

  • 宁波容百新能源科技股份有限公司

Dates

Publication Date
20260505
Application Date
20230427

Claims (9)

  1. 1. The calcination device is characterized by comprising a kiln (100) and a sagger (200) arranged in the kiln (100), wherein a side air inlet (110) and a roller way (120) are further arranged in the kiln (100), the roller way (120) is used for driving the sagger (200) to move along a first direction, the sagger (200) comprises two support legs (210) arranged at intervals along the first direction, an opening (220) communicated with the inside of the sagger (200) is formed between the two support legs (210), and the side air inlet (110) is configured to be opened when the side air inlet (110) corresponds to the opening (220) in the first direction, and the side air inlet (110) is closed when the side air inlet (110) corresponds to the support legs (210) Along the first direction, a plurality of saggers (200) are arranged in the kiln (100), the saggers (200) are mutually abutted, along the first direction, a plurality of side air inlets (110) are also arranged in the kiln (100), two adjacent side air inlets (110) are arranged at equal intervals, and the opening time of the side air inlets (110) is as follows: Wherein x is the length of the leg (210) in the first direction, y is the length of the opening (220) in the first direction, v is the travelling speed of the roller table (120) in the first direction, n is the number of the sagger (200) in the first direction and is a positive integer, a is the distance between the first side air inlet (110) and the sagger (200) nearest to the first side air inlet in the first direction in the initial state, τ is the distance between two side air inlets (110) adjacent to each other in the first direction, and m is the number of the side air inlets (110) in the first direction and is a positive integer.
  2. 2. The calcination apparatus according to claim 1, wherein in the first direction, if a distance between two adjacent side inlets (110) is an integer multiple of the length of the sagger (200), and a plurality of the side inlets (110) are synchronously opened or closed, the opening time of the side inlets (110) satisfies: 。
  3. 3. The calcination apparatus according to claim 1 or 2, wherein the outside of the side inlet (110) is further provided with a control mechanism communicating with the side inlet (110), the control mechanism comprising a driving member, a sleeve (310) and a piston (320), the sleeve (310) being provided with an air outlet (311) communicating with the side inlet (110) and an air inlet (312) for connecting with an external air source, the piston (320) being provided in the sleeve (310), the driving member being connected with the piston (320) to drive the piston (320) to move in the sleeve (310); The air inlet (312) is located in the range of travel of the piston (320), the air outlet (311) is located outside the range of travel of the piston (320), the piston (320) is located outside the air inlet (312) when the side air inlet (110) corresponds to the opening (220) in the first direction so as to expose the air inlet (312), and the piston (320) shields the air inlet (312) when the side air inlet (110) corresponds to the support leg (210).
  4. 4. A calcination apparatus according to claim 3, wherein the driving member comprises a crank (330) and a slider (340), a first end of the crank (330) is used for connecting a driving motor, a second end of the crank (330) is connected with the slider (340), the slider (340) is slidably arranged in the sleeve (310), and the slider (340) is connected with the piston (320) through a piston rod (350).
  5. 5. A calcination device according to claim 3, characterized in that two of the magazines (200) are arranged one above the other in a second direction in which the side air inlet (110) corresponds to the opening (220) of the subjacent magazine (200); Wherein the first direction and the second direction are perpendicular to each other.
  6. 6. The calcination apparatus according to claim 5, wherein the kiln (100) includes a first side wall (101) and a second side wall (102) disposed opposite to each other in a third direction, a plurality of the side air inlets (110) are provided on each of the first side wall (101) and the second side wall (102), and the plurality of the side air inlets (110) on the first side wall (101) are in one-to-one correspondence with the plurality of the side air inlets (110) on the second side wall (102); Along the third direction, a plurality of saggers (200) are arranged between the first side wall (101) and the second side wall (102); the first direction, the second direction and the third direction are perpendicular to each other.
  7. 7. A calcination apparatus air intake method applied to the calcination apparatus according to any one of claims 1 to 6, comprising: Acquiring a dimension parameter of the sagger (200) along a first direction, a position parameter of a side air inlet (110) in the kiln (100) along the first direction and a travelling speed of a roller way (120) along the first direction; Based on a dimensional parameter of the sagger (200) in a first direction, a position parameter of a side air inlet (110) in the kiln (100) in the first direction and a travelling speed of the roller table (120) in the first direction, a state of the side air inlet (110) is controlled so that the side air inlet (110) is opened when corresponding to an opening (220) of the sagger (200) in the first direction and the side air inlet (110) is closed when corresponding to a support leg (210) of the sagger (200).
  8. 8. The method for feeding air into a calcination apparatus according to claim 7, wherein a plurality of saggers (200) are provided in the kiln (100) in the first direction, the plurality of saggers (200) are abutted against each other, a plurality of side air inlets (110) are provided in the kiln (100) in the first direction, two adjacent side air inlets (110) are provided at equal intervals, and the opening time of the side air inlets (110) is as follows: Wherein x is the length of the leg (210) in the first direction, y is the length of the opening (220) in the first direction, v is the travelling speed of the roller table (120) in the first direction, n is the number of the sagger (200) in the first direction and is a positive integer, a is the distance between the first side air inlet (110) and the sagger (200) nearest to the first side air inlet in the first direction in the initial state, τ is the distance between two side air inlets (110) adjacent to each other in the first direction, and m is the number of the side air inlets (110) in the first direction and is a positive integer.
  9. 9. The calcination apparatus intake method according to claim 8, wherein, in the first direction, if a distance between two adjacent side intake ports (110) is an integer multiple of the sagger (200) length, and a plurality of the side intake ports (110) are opened or closed simultaneously, the opening time of the side intake ports (110) satisfies: 。

Description

Calcining device and air inlet method of calcining device Technical Field The application relates to a preparation technology of a battery anode material, in particular to a calcining device and an air inlet method of the calcining device. Background With the progress of technology, the technology of new energy materials, namely batteries, is rapidly developed, wherein the adoption of ternary materials as the positive electrode materials of batteries is a main development direction. Calcination is a very important step in the production of battery cathode materials, which to a considerable extent determines the electrochemical properties of the material and affects the performance of the final battery. Calcination of the ternary material is generally carried out in a kiln such as a roller kiln. When in calcination, the ternary material is put into a sagger and then is integrally put into a kiln, and specific gases (such as dry air, oxygen or nitrogen and the like) are introduced into the kiln to form a required process atmosphere. The ternary material may generate some exhaust gases (e.g., water vapor and carbon dioxide) during calcination, which if collected near the sagger would affect the quality of the ternary material. In the related art, in order to reduce the influence of the exhaust gas on the calcination of the ternary material, one method is to continuously increase the intake air amount and the exhaust gas amount to improve the gas fluidity and dilute the concentration of the exhaust gas in the kiln, but this method increases the calcination cost. Another method is to reduce the amount of ternary materials contained in the kiln, thereby reducing the exhaust gas emission from the source, but this method affects the kiln productivity. Disclosure of Invention In order to overcome the above-mentioned drawbacks of the related art, an object of the present application is to provide a calcining apparatus and an air intake method for the calcining apparatus, in which the fluidity of the air near the sagger is improved by improving the air intake mode of the air, so as to facilitate the improvement of the calcining quality of the ternary material. In one aspect, the application provides a calcining device, which comprises a kiln and a sagger arranged in the kiln, wherein a side air inlet and a roller way are further arranged in the kiln, the roller way is used for driving the sagger to move along a first direction, the sagger comprises two supporting legs which are arranged at intervals along the first direction, an opening communicated with the inside of the sagger is formed between the two supporting legs, and the side air inlet is configured to be opened when the side air inlet corresponds to the opening in the first direction, and closed when the side air inlet corresponds to the supporting legs. According to the calcination device, the kiln is internally provided with the saggers which are abutted with each other along the first direction, the kiln is internally provided with the side air inlets along the first direction, two adjacent side air inlets are arranged at equal intervals, and the opening time of the side air inlets meets the following conditions: Wherein x is the length of the support leg in the first direction, y is the length of the opening in the first direction, v is the travelling speed of the roller table in the first direction, n is the number of the sagger in the first direction and is a positive integer, a is the distance between a first side air inlet and the sagger nearest to the first side air inlet in the first direction in an initial state, τ is the distance between two adjacent side air inlets in the first direction, and m is the number of the side air inlets in the first direction and is a positive integer. In the calcination apparatus as described above, optionally, if a distance between two adjacent side inlets is an integer multiple of the sagger length along the first direction, and a plurality of the side inlets are synchronously opened or closed, the opening time of the side inlets satisfies:。 Optionally, the calcining device as described above is further provided with a control mechanism communicated with the side inlet, the control mechanism comprises a driving member, a sleeve and a piston, the sleeve is provided with an air outlet communicated with the side inlet and an air inlet used for connecting an external air source, the piston is arranged in the sleeve, and the driving member is connected with the piston so as to drive the piston to move in the sleeve; the air inlet is positioned in the range of travel of the piston, the air outlet is positioned outside the range of travel of the piston, the piston is positioned outside the air inlet when the side air inlet corresponds to the opening in the first direction so as to expose the air inlet, and the piston shields the air inlet when the side air inlet corresponds to the support leg. Optionally, the driving membe