CN219624457U - Roller kiln for sintering lithium battery anode material - Google Patents

Abstract

The utility model relates to the technical field of roller furnaces, and discloses a roller furnace for sintering lithium battery anode materials, which comprises a furnace body and a heat exchanger, wherein a roller rod is arranged in the furnace body in a rotating manner, an upper heating wire and a lower heating wire are respectively arranged above and below the roller rod in the furnace body, an exhaust hole is formed in the top of the furnace body, the exhaust hole is respectively communicated with the outside through an exhaust chimney or is connected with an air inlet of an exhaust fan through a flue gas pipeline, an exhaust valve is arranged on the flue gas pipeline, and an air outlet of the exhaust fan is connected with a heat source inlet end of the heat exchanger; an air cavity is arranged on the bottom wall of the furnace body, the lower end of the air cavity is connected with a main air inlet hole, the upper end of the air cavity is provided with a plurality of branch air inlet holes, the two side walls of the furnace body are provided with side air inlet holes, the heat source inlet end of the heat exchanger is respectively connected with the main air inlet hole and the side air inlet holes through an air inlet pipeline, and the air inlet pipeline is provided with flow regulating valves. The utility model preheats the atmosphere entering the furnace body by utilizing the waste heat of the flue gas, reduces the influence on the temperature in the furnace and saves more energy of the system.

Description

Roller kiln for sintering lithium battery anode material

Technical Field

The utility model relates to the technical field of roller furnaces, in particular to a roller furnace for sintering a lithium battery anode material.

Background

The lithium battery anode material is prepared by mixing raw materials in a production process, placing the raw materials in a sagger, and then sintering the raw materials at a high temperature through a roller furnace. The sintering process is usually carried out under the atmosphere conditions of air or oxygen and the like, so that an air inlet and a flue gas exhaust hole are formed in the roller hearth furnace, but the air entering the air inlet of the conventional roller hearth furnace is not preheated, so that the furnace temperature and the temperature consistency are affected, and the flue gas waste heat is not fully recycled, so that the system is not energy-saving enough.

Disclosure of Invention

The utility model aims to solve the problems, and provides a roller furnace for sintering a lithium battery anode material, which can preheat the atmosphere entering a furnace body, reduce the influence on the temperature in the furnace, and recycle the waste heat of flue gas so that the system is more energy-saving.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the roller furnace for sintering the lithium battery anode material comprises a furnace body, wherein a roller rod for conveying a sagger is rotationally arranged in the furnace body, an upper heating wire and a lower heating wire are respectively arranged above and below the roller rod in the furnace body, the roller furnace also comprises a heat exchanger, the top of the furnace body is provided with an exhaust hole communicated with the inner cavity of the furnace body, the exhaust hole is respectively communicated with the outside through an exhaust chimney or is connected with an air inlet of an exhaust fan through a flue gas pipeline, an exhaust valve is arranged on the flue gas pipeline, and an air outlet of the exhaust fan is connected with a heat source inlet end of the heat exchanger; the bottom wall of the furnace body is provided with an air cavity, the lower end of the air cavity is connected with a main air inlet hole, the upper end of the air cavity is provided with a plurality of split air inlet holes communicated with the inner cavity of the furnace body, the two side walls of the furnace body are symmetrically provided with side air inlet holes, the heat source inlet end of the heat exchanger is respectively connected with the main air inlet hole and the side air inlet holes through air inlet pipelines, and the air inlet pipelines are respectively provided with flow regulating valves.

Furthermore, K-type thermocouples are arranged on the two side walls of the furnace body and below the upper heating wire and above the lower heating wire.

Further, the upper heating wire and the lower heating wire are both nichrome heating wires.

Further, the roller is a ceramic roller.

Further, the exhaust chimney is of an L-shaped structure.

Furthermore, a ceramic anti-corrosion inner layer is arranged in the flue gas pipeline.

Further, the vertical height between the side air inlet hole and the roller rod is equal to the height of the sagger, and the distance between the adjacent air inlet holes is equal to the horizontal width of the sagger.

By adopting the technical scheme, the utility model has the following beneficial effects:

the bottom of the furnace body is provided with the main air inlet hole and the side wall of the furnace body is provided with the air inlet hole, so that uniformity of gas entering the furnace is ensured, and the heat exchanger is arranged, so that the gas entering the main air inlet hole or the air inlet hole exchanges heat with the gas in the heat exchanger, thereby preheating the gas entering the furnace in advance, reducing influence of the entering gas on the temperature in the furnace, fully utilizing the gas to preheat, and enabling the system to be more energy-saving.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

in the figure: the device comprises a furnace body 1, a roller rod 2, a lower heating wire 3, an upper heating wire 4, an exhaust hole 5, an exhaust fan 6, a heat exchanger 7, an air inlet hole 8, a main air inlet hole 9, an air cavity 10, an air inlet hole 11, a flow regulating valve 12, a thermocouple 13, an exhaust chimney 14, a flue gas pipeline 15 and an exhaust valve 16.

Detailed Description

In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

As shown in fig. 1, the roller furnace for sintering the lithium battery anode material comprises a furnace body 1 and a heat exchanger 7, wherein a roller rod 2 for conveying sagger is rotationally arranged in the furnace body 1, an upper heating wire 4 and a lower heating wire 3 are respectively arranged above and below the roller rod 2 in the furnace body 1, an exhaust hole 5 communicated with the inner cavity of the furnace body 1 is arranged at the top of the furnace body 1, the exhaust hole 5 is respectively communicated with the outside through an exhaust chimney 14 or is connected with an air inlet of an exhaust fan 6 through a flue gas pipeline 15, and an air outlet of the exhaust fan 6 is connected with a heat source inlet end of the heat exchanger 7; an air cavity 10 is arranged on the bottom wall of the furnace body 1, the lower end of the air cavity 10 is connected with a main air inlet hole 9, a plurality of air dividing holes 11 which are respectively communicated with the inner cavity of the furnace body 1 are arranged at the upper end of the air cavity 10, side air inlet holes 8 are symmetrically arranged on the two side walls of the furnace body 1, and the heat source inlet end of the heat exchanger 7 is respectively connected with the main air inlet hole 9 and the side air inlet holes 8 through air inlet pipelines. The flue gas pipeline 15 is provided with an exhaust valve 16, the exhaust valve 16 is used for controlling the exhaust, and the air inlet pipelines connected with the main air inlet 9 and the air inlet 8 are respectively provided with a flow regulating valve 12 for controlling the flow of gas.

In this embodiment, K-type thermocouples 13 are disposed on both side walls of the furnace body 1 below the upper heating wire 4 and above the lower heating wire 3. The K-type thermocouple is favorable for detecting the temperature in the furnace, has the advantages of high sensitivity, good stability and uniformity, strong oxidation resistance and the like, and can continuously measure the temperature in the range of-50-1600 ℃.

In this embodiment, the upper heating wire 4 and the lower heating wire 3 are nichrome heating wires. The nichrome heating wire has high strength, is not easy to deform and change structure after long-term high-temperature operation, and in addition, the nichrome heating wire has high emissivity, good corrosion resistance and long service life.

In this embodiment, the roller 2 is a ceramic roller. The ceramic roller has higher temperature resistance and improves the high-temperature service performance of the roller 2.

In this embodiment, the exhaust stack 14 has an L-shaped structure. This structure prevents dust in the flue gas from flowing back into the furnace body 1.

In this embodiment, a ceramic corrosion-resistant inner layer is provided inside the flue gas duct 15. The structure can reduce corrosion in the pipeline and prolong the service life of the pipeline.

In this embodiment, the vertical height between the side air inlet holes 8 and the roller bar 2 is equal to the height of the sagger, and the distance between the adjacent air inlet holes 11 is equal to the horizontal width of the sagger. The structure ensures that the air inlet holes 8 correspond to the space between the two layers of saggers, ensures the air inlet uniformity of the lower layer of saggers, and the air inlet holes 11 are opposite to the space between the two saggers, thereby being beneficial to air inlet.

The working principle of the utility model is as follows:

when the lithium battery anode material is used, the anode material of the lithium battery is placed in the sagger, the sagger is placed on the rotating roller bar 2, the sagger enters the inner cavity of the furnace body 1 under the driving of the roller bar 2, the inner cavity of the furnace body 1 is heated by the upper heating wire 4 and the lower heating wire 3, the uniformity of the temperature in the furnace is ensured, part of flue gas is discharged through the exhaust chimney 14, part of flue gas enters the heat exchanger 7 through the flue gas pipeline 15 to exchange heat with gas entering the furnace, the heat exchanged flue gas is discharged, the heat exchanged gas enters the air cavity 10 through the main air inlet hole 9 and then is evenly distributed into the air distribution holes 11 to enter from the bottom or enters from the side part through the side air inlet hole 8, and as the gas is hotter through the flue gas waste heat, the influence of the entering gas on the temperature in the furnace is reduced, and the flue gas waste heat can be recycled, so that the system is more energy-saving.

The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims (7)

1. The utility model provides a roller bed furnace for lithium cell positive electrode material sintering, includes the furnace body, the furnace body rotation is provided with the roller that is used for carrying the sagger, and is located roller top and below in the furnace body and is equipped with heater strip, lower heater strip respectively, its characterized in that: the heat exchanger is characterized by further comprising a heat exchanger, wherein the top of the furnace body is provided with an exhaust hole communicated with the inner cavity of the furnace body, the exhaust hole is respectively communicated with the outside through an exhaust chimney or is connected with an air inlet of an exhaust fan through a flue gas pipeline, the flue gas pipeline is provided with an exhaust valve, and an air outlet of the exhaust fan is connected with a heat source inlet end of the heat exchanger; the bottom wall of the furnace body is provided with an air cavity, the lower end of the air cavity is connected with a main air inlet hole, the upper end of the air cavity is provided with a plurality of split air inlet holes communicated with the inner cavity of the furnace body, the two side walls of the furnace body are symmetrically provided with side air inlet holes, the heat source inlet end of the heat exchanger is respectively connected with the main air inlet hole and the side air inlet holes through air inlet pipelines, and the air inlet pipelines are respectively provided with flow regulating valves.

2. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: k-type thermocouples are arranged on the two side walls of the furnace body and below the upper heating wire and above the lower heating wire.

3. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: the upper heating wire and the lower heating wire are both nichrome heating wires.

4. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: the roller is a ceramic roller.

5. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: the exhaust chimney is of an L-shaped structure.

6. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: and a ceramic anti-corrosion inner layer is arranged in the flue gas pipeline.

7. The roller hearth furnace for sintering lithium battery anode material according to claim 1, wherein: the vertical height between the side air inlet hole and the roller rod is equal to the height of the sagger, and the distance between the adjacent air inlet holes is equal to the horizontal width of the sagger.