CN-224230720-U - Auxiliary heating structure and kiln

Abstract

The utility model discloses an auxiliary heating structure and a kiln, which belong to the technical field of kiln heating, and comprise a kiln body and a kiln chamber arranged in the kiln body, wherein an auxiliary heating device is arranged on the side wall of the kiln body, the auxiliary heating device comprises a supporting piece, a heating element and a diffusion cavity, the diffusion cavity is arranged on the supporting piece, the diffusion cavity faces the kiln chamber, the heating element passes through the supporting piece and can be connected in the diffusion cavity in an adjustable way, and the heat sources on two sides of the kiln body are supplemented, so that the furnace chamber is internally heated in a surrounding way, the heating uniformity is higher, and the quality of sintered battery materials is better.

Inventors

• YU LEI
• YANG WEI
• WANG ZINENG
• ZHAO MENG
• ZHU WUYANG
• FENG QIAN

Assignees

• 广东科达新能源装备有限公司

Dates

Publication Date

20260512

Application Date

20250526

Claims (10)

1. 1. The auxiliary heating structure comprises a furnace body (1) and a furnace chamber (2) arranged in the furnace body (1), and is characterized in that an auxiliary heating device (7) is arranged on the side wall of the furnace body (1), the auxiliary heating device (7) comprises a supporting piece (701), a heating element (702) and a diffusion cavity (703), the diffusion cavity (703) is arranged on the supporting piece (701), the diffusion cavity (703) faces the furnace chamber (2), and the heating element (702) penetrates through the supporting piece (701) and is connected in the diffusion cavity (703) in an adjustable mode.
2. 2. The auxiliary heating structure of claim 1, wherein: The diffusion chamber (703) is arranged in a horn shape.
3. 3. The auxiliary heating structure of claim 1, wherein: the heating element (702) is inserted onto the support (701).
4. 4. A supplemental heating structure according to claim 3, wherein: The angle between the heating element (702) and the vertical direction after the heating element (702) is A, and 0 degrees < A <90 degrees.
5. 5. The auxiliary heating structure of claim 1, wherein: the heating element (702) is one of a heating wire or an electric heating rod.
6. 6. The auxiliary heating structure of claim 1, wherein: the lower wall of the diffusion chamber (703) extends a greater length than the upper wall.
7. 7. The auxiliary heating structure of any of claims 1-6, wherein: A heat reflecting layer is arranged on the inner wall of the diffusion cavity (703).
8. 8. A kiln is characterized by comprising an auxiliary heating structure, an upper heating part (4), a lower heating part (6) and conveying roller rods (5), wherein the auxiliary heating structure is arranged on two side walls of a kiln body (1), the conveying roller rods (5) are arranged at intervals along the length direction of the kiln body (1), the upper heating part (4) and the lower heating part (6) are respectively arranged above and below the conveying roller rods (5), and the auxiliary heating structure is the auxiliary heating structure according to any one of claims 1-7.
9. 9. The kiln as recited in claim 8, wherein: the heating device further comprises a temperature control element (8), wherein the temperature control element (8) is respectively close to the upper heating piece (4) and the lower heating piece (6).
10. 10. The kiln as recited in claim 8, wherein: the auxiliary heating structure is arranged above the conveying roller rod (5).

Description

Auxiliary heating structure and kiln Technical Field The utility model relates to the technical field of kiln heating, in particular to an auxiliary heating structure and a kiln. Background Along with the acceleration of the industrialization progress of the lithium battery technology, the demand of the power battery of the new energy vehicle is rapidly increased, and the production of the lithium battery material presents a large-scale development trend. The roller kiln used as the core lithium battery material sintering equipment needs to be upgraded, and in order to enlarge the yield in a limited factory space, the width of the kiln body and the number of stacked loading layers are required to be widened to increase the battery materials sintered simultaneously, so that the production of large capacity is realized, and meanwhile, the energy consumption of units can be reduced. The current mainstream multi-row sagger roller kiln has the common phenomenon of uneven distribution of a thermal field, and the width of the kiln body and the temperature uniformity are in negative correlation. Typically, the temperature in the central region of the kiln is higher (the temperature difference can reach +/-15 ℃), and the temperature gradient in the two side regions is obviously reduced. The thermal field distortion directly causes unstable sintering quality of the lithium battery material, and the consistency of the crystalline phase structure of the positive and negative electrode battery material is damaged, so that the energy density and the cycle life of the battery are seriously affected. The vertical gradient heating scheme as proposed in patent CN116678206a, although achieving temperature compensation in the height direction by heating rods of different lengths on both sides, has structural drawbacks in the heat source layout. The heating elements are intensively distributed at the bottom and two sides of the sagger, and the upper area lacks effective thermal compensation, so that a longitudinal layering effect is generated in a heat flow field. Meanwhile, the direct-insert heating rod mounting mode is difficult to maintain, a cold bridge effect is easier to form in a wide kiln, the upper expansion limit of the kiln width is limited, and another improvement scheme CN222460216U is used for attempting to improve the edge temperature through a flue temperature supplementing structure embedded in the kiln wall, and a flue communication design and auxiliary heating element combination technology is adopted. The structure can enhance the transverse flow of high-temperature gas, but firstly, the flue connectivity is contrary to the partition temperature control requirement, and the multiple heating elements are difficult to realize independent power adjustment, so that the local overheat risk is caused, secondly, the kiln wall indent type flue structure obviously weakens the mechanical strength of the kiln body, creep deformation is easy to occur in a structural stress concentration area under the high-temperature working condition of more than 1000 ℃ for a long time, the potential safety hazard of cracking of the kiln body exists, the service life of equipment is shortened, and an auxiliary heating structure is needed to assist in supplementing heat in the kiln to solve the problems, so that the heating uniformity is improved. Disclosure of utility model The utility model aims to provide an auxiliary heating structure, which solves the problems of low heating efficiency and poor heating uniformity of the side surface of a sagger of the existing heating structure. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The utility model provides an auxiliary heating structure, is in including furnace body and setting furnace chamber in the furnace body, be equipped with auxiliary heating device on the lateral wall of furnace body, auxiliary heating device includes support piece, heating element and diffusion chamber, the diffusion chamber sets up on the support piece, just the diffusion chamber orientation the furnace chamber, heating element passes support piece adjustable connection is in the diffusion intracavity, has replenished the heat source of furnace body both sides, make form in the furnace chamber and encircle the heating, the homogeneity of heating is higher, and the quality of sintered battery material is better. Furthermore, the diffusion cavity is arranged in a horn shape, and the heat of the heating element is directionally converged and reflected into the furnace cavity, so that the heat utilization rate is improved. Furthermore, the heating element is inserted on the supporting piece, so that the insertion depth can be conveniently replaced and adjusted during maintenance. Preferably, the angle between the heating element and the vertical direction after the heating element is inserted is A,0 degrees < A <90 degrees, the occupation of the heating elem