Double-layer lithium battery roller kiln

Abstract

The utility model discloses a double-layer lithium battery roller kiln, which belongs to the technical field of lithium battery material sintering and comprises a first roller unit and a second roller unit, the first roller unit is stacked on the second roller unit, and the second roller unit is stacked on the first roller unit. The first roller bed unit comprises an upper-layer inlet replacement chamber, an upper-layer heating section, an upper-layer heat preservation section, an upper-layer slow cooling section, an upper-layer quenching section and an upper-layer outlet replacement chamber which are connected in sequence; the second roller bed unit comprises a lower-layer inlet replacement chamber, a lower-layer heating section, a lower-layer heat preservation section, a lower-layer slow cooling section, a lower-layer quenching section and a lower-layer outlet replacement chamber which are sequentially connected, and all the sections in the first roller bed unit and the second roller bed unit are communicated or separated. The upper part can utilize the heat of the lower part, so that the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery material sintering, in particular to a double-layer lithium battery roller kiln. Background Art

[0002] Traditional roller kilns mostly adopt single-channel unidirectional operation. The sagger is sintered into shape after passing through the heating section, insulation section, slow cooling section and insulation section in the electric kiln body. During heating, the heating pipes distributed on the two side walls of the kiln heat the products in the kiln, and the heat will be discharged to the outside. However, the roller kiln has low heat utilization rate and high energy consumption during the heating process, and the roller kiln occupies a large area. In order to improve the utilization rate of thermal energy and make full use of space, a roller kiln that can meet the needs of multi-layer sintering is needed.

[0003] The existing patent application with publication number CN117128763A discloses a roller electric kiln and a preparation method thereof, wherein the electric kiln comprises a kiln body, a first component and a heat-insulating cover body, wherein the heat-insulating cover body comprises a peripheral component and an inner peripheral component, wherein the inner peripheral component comprises a fireproof part, a fire-resistant beam and a fireproof heat-insulating part, wherein the fireproof part is an arched structure, wherein the fire-resistant beam is placed below the fireproof part and the two ends are connected to the inner side of the sealed connection through an L-shaped connector, and the fireproof heat-insulating part is placed above the fireproof part; the method comprises: fixing the L-shaped connector on both sides of the sealed connection, then installing the fireproof beam on the L-shaped connector to prevent foreign matter from falling onto the product, installing the arched fireproof part on the L-shaped connector and the fireproof beam, and arranging the fireproof heat-insulating part on the outer side of the fireproof part; and the gap between the peripheral component and the inner peripheral component is filled with heat-insulating loose cotton. However, the roller electric kiln still has the problems of low heat utilization and large floor space. Utility Model Content

[0004] The utility model aims to provide a double-layer lithium battery roller kiln, which solves the problems of large energy consumption and large floor space of the existing roller kiln.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A double-layer lithium battery roller kiln comprises a first roller unit and a second roller unit, wherein the first roller unit is stacked on the second roller unit, wherein the first roller unit comprises an upper inlet displacement chamber, an upper heating section, an upper insulation section, an upper slow cooling section, an upper rapid cooling section and an upper outlet displacement chamber which are connected in sequence, and the second roller unit comprises a lower inlet displacement chamber, a lower heating section, a lower insulation section, a lower slow cooling section, a lower rapid cooling section and a lower outlet displacement chamber which are connected in sequence, wherein the sections in the first roller unit and the second roller unit are connected or disconnected, and space occupancy is reduced by stacking, and the upper portion can utilize the heat of the lower portion to reduce energy consumption.

[0007] Furthermore, the upper inlet displacement chamber is opposite to the lower inlet displacement chamber, the upper heating section is opposite to the lower heating section, the upper insulation section is opposite to the lower insulation section, the upper slow cooling section is opposite to the lower slow cooling section, the upper rapid cooling section is opposite to the lower rapid cooling section, and the upper outlet displacement chamber is opposite to the lower outlet displacement chamber, which is convenient for installation and waste heat utilization.

[0008] Furthermore, the upper inlet replacement chamber is opposite to the lower outlet replacement chamber, the upper heating section is opposite to the lower rapid cooling section, the upper insulation section is opposite to the lower slow cooling section, the upper slow cooling section is opposite to the lower insulation section, the upper rapid cooling section is opposite to the lower heating section, and the upper outlet replacement chamber is opposite to the lower inlet replacement chamber, which can flexibly upgrade and transform the existing kiln and reduce the transformation cost.

[0009] Preferably, it further comprises a partition layer, which is arranged between the first roller unit and the second roller unit for isolation.

[0010] Preferably, the first roller unit and the second roller unit have the same structure, the upper heating section includes a first heating element and a first conveying roller, the lower heating section includes a second heating element and a second conveying roller, the first conveying roller is sequentially arranged in the upper heating section, the first heating element is arranged on the inner wall of the upper heating section, the second conveying roller is sequentially arranged in the lower heating section, and the second heating element is arranged on the inner wall of the lower heating section.

[0011] More preferably, the upper temperature rising section also includes a deceleration drive, which is arranged on the outer wall of the temperature rising section and is connected to one end of the first conveying roller to drive the conveying roller to move independently, has a strong load capacity and prevents the sagger from slipping.

[0012] Preferably, it further comprises a smoke exhaust system, which is connected to the upper temperature rising section and the lower temperature rising section respectively and is used for exhausting smoke and impurities.

[0013] Preferably, the insulation layer is made of refractory material to prevent heat transfer.

[0014] Preferably, it further comprises a cooling system, wherein the cooling system is respectively connected to the upper quenching section and the lower quenching section for lowering the temperature.

[0015] Furthermore, the first roller unit and the second roller unit are installed in a modular structure, which is convenient for flexible installation in the site and reduces the cost of installation and transportation.

[0016] The beneficial effects of the utility model are:

[0017] (1) The double-layer lithium battery roller kiln is composed of a stacked first roller unit and a second roller unit. The stacked layout reduces the length of the entire roller kiln while ensuring the output remains unchanged, thereby reducing the floor space. The first roller unit on the upper layer can utilize the heat of the second roller unit on the lower layer, thereby improving the heat utilization rate and reducing energy consumption. The two roller units can share some system components, thereby reducing the installation cost of the roller kiln.

[0018] (2) The two roller units on the double-layer lithium battery roller kiln are installed in the same direction or in the opposite direction, and are arranged in a modular manner. They can be modified and formed on the original unit-layer roller kiln, which is flexible to install and reduces installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The layout of the double-layer lithium battery roller kiln provided by the utility model Figure 1 ;

[0020] Figure 2 A cross-sectional structural diagram of the temperature-raising section provided by the utility model;

[0021] Figure 3 A longitudinal sectional structural diagram of the temperature-raising section provided by the utility model;

[0022] Figure 4 The layout of the double-layer lithium battery roller kiln provided by the utility model Figure 2 ;

[0023] Figure 5 The first layout scheme of the double-layer lithium battery roller kiln provided by the utility model;

[0024] Figure 6 The second layout scheme of the double-layer lithium battery roller kiln provided by the utility model;

[0025] Figure 7 This is a longitudinal sectional structural diagram of the temperature rising section provided in Example 2.

[0026] Reference numerals:

[0027] a, the first roller unit; b, the second roller unit; 1a, the upper inlet displacement chamber; 2a, the upper heating section; 3a, the upper insulation section; 4a, the upper slow cooling section; 5a, the upper rapid cooling section; 6a, the upper outlet displacement chamber; 1b, the lower inlet displacement chamber; 2b, the lower heating section; 3b, the lower insulation section; 4b, the lower slow cooling section; 5b, the lower rapid cooling section; 6b, the lower outlet displacement chamber; 21, the first heating element; 22, the first conveying roller; 221, the reduction drive; 23, the partition; 24, the frame; 25, the second heating element; 26, the second conveying roller; 7, the partition; 8, the sagger; 91, the smoke exhaust system; 92, the smoke exhaust fan; 93, the upper smoke exhaust pipe; 94, the lower smoke exhaust pipe; 95, the cooling system; 96, the flow monitoring system. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] like Figure 1-Figure 6 As shown, this embodiment discloses a double-layer lithium battery roller kiln, including a first roller unit a and a second roller unit b, the first roller unit a is stacked on the second roller unit b, the first roller unit a includes an upper inlet displacement chamber 1a, an upper heating section 2a, an upper insulation section 3a, an upper slow cooling section 4a, an upper rapid cooling section 5a and an upper outlet displacement chamber 6a connected in sequence, the second roller unit b includes a lower inlet displacement chamber 1b, a lower heating section 2b, a lower insulation section 3b, a lower slow cooling section 4b, a lower rapid cooling section 5b and a lower outlet displacement chamber 6b connected in sequence, the sections in the first roller unit a and the second roller unit b are connected or disconnected, the first roller unit a can use the heat dissipated upward by the second roller unit b to reduce energy consumption, and when the upper and lower section temperatures are the same, the energy consumption can be reduced by 15% to 25%.

[0031] Furthermore, the upper inlet displacement chamber 1a is opposite to the lower inlet displacement chamber 1b, the upper heating section 2a is opposite to the lower heating section 2b, the upper insulation section 3a is opposite to the lower insulation section 3b, the upper slow cooling section 4a is opposite to the lower slow cooling section 4b, the upper rapid cooling section 5a is opposite to the lower rapid cooling section 5b, the upper outlet displacement chamber 6a is opposite to the lower outlet displacement chamber 6b, the upper and lower layers are arranged relative to each other, the installation structure is simple, the layout is convenient, and it is easy to utilize the heat of the lower layer and accelerate the heat discharge.

[0032] Furthermore, in another embodiment, the upper inlet displacement chamber 1a is opposite to the lower outlet displacement chamber 6b, the upper heating section 2a is opposite to the lower rapid cooling section 5b, the upper insulation section 3a is opposite to the lower slow cooling section 4b, the upper slow cooling section 4a is opposite to the lower insulation section 3b, the upper rapid cooling section 5a is opposite to the lower heating section 2b, and the upper outlet displacement chamber 6a is opposite to the lower inlet displacement chamber 1b. Through reverse stacking, the production conditions within the site can be flexibly utilized, and it can be upgraded on the basis of the existing kiln, reducing the transformation cost.

[0033] Furthermore, the first roller unit a and the second roller unit b are connected up and down, which facilitates the lower heating section 2b to transfer heat to the upper heating section 2a, accelerates the heating of the sagger 8, and improves the utilization rate of heat; the upper rapid cooling section 5a and the lower rapid cooling section 5b are connected up and down to improve the heat discharge efficiency.

[0034] Furthermore, an interlayer 7 is provided between the first roller unit a and the second roller unit b, so that the temperature in a single section can be accurately controlled.

[0035] Preferably, the first roller unit a and the second roller unit b have the same structure, the upper temperature rising section 2a includes a first heating element 21 and a first conveying roller 22, the lower temperature rising section 2b includes a second heating element 25 and a second conveying roller 26, the first conveying roller 22 is sequentially arranged in the upper temperature rising section 2a, the first heating element 21 is arranged on the inner wall of the upper temperature rising section 2a, the second conveying roller 26 is sequentially arranged in the lower temperature rising section 2b, and the second heating element 25 is arranged on the inner wall of the lower temperature rising section 2b, so as to uniformly heat the sagger 8.

[0036] More preferably, the upper temperature rising section 2a and the lower temperature rising section 2b, the upper temperature rising section 2a also includes a reduction drive 221, the reduction drive 221 is arranged on the outer wall of the temperature rising section 2, and the reduction drive 221 is connected to one end of the first conveying roller 22, and each conveying roller is connected to a reduction drive 221, so as to prevent the sagger 8 from slipping or getting stuck when moving on the conveying roller, thereby improving the conveying capacity of the conveying roller.

[0037] The partition 7 is made of refractory material and is used to isolate the heat transfer between the upper and lower layers, so that the first roller unit a and the second roller unit b can be used separately.

[0038] See also Figure 1The upper temperature-rising section 2a is located above the lower temperature-rising section 2b. The heat generated in the lower temperature-rising section 2b is transferred upward to the upper temperature-rising section 2a to heat the sagger 8 in the upper temperature-rising section 2a. The energy consumption is reduced by reusing the waste heat in the lower temperature-rising section 2b. The vertical space is fully utilized by stacking the upper temperature-rising section 2a and the lower temperature-rising section 2b, thereby reducing the floor space of the roller kiln. In addition, the upper heat-insulating section 3a can also play a role in utilizing waste heat and reducing space occupancy.

[0039] More preferably, the first heating element 21 and the second heating element 25 are electric heating tubes, which are easy to control and heat up quickly.

[0040] Preferably, it also includes a smoke exhaust system 91, which is connected to the upper temperature rising section 2a and the lower temperature rising section 2b respectively. Specifically, the smoke exhaust system 91 includes a smoke exhaust fan 92, an upper smoke exhaust pipe 93 and a lower smoke exhaust pipe 94. The upper smoke exhaust pipe 93 and the lower smoke exhaust pipe 94 are respectively connected to the upper temperature rising section 2a and the lower temperature rising section 2b, so as to increase the smoke exhaust volume.

[0041] Preferably, a cooling system 95 is further included, which is connected to the upper quenching section 5a and the lower quenching section 5b respectively, and is used to input cooling water to cool the sagger 8.

[0042] Preferably, a flow monitoring system 96 is also included, which is connected to each section in the first roller unit a and the second roller unit b respectively. Each section is individually connected with a flow meter for separately monitoring the change of gas flow and improving the accuracy of temperature control.

[0043] Furthermore, the first roller unit a and the second roller unit b are installed in a modular structure, and the upper inlet displacement chamber 1a, the upper heating section 2a, the upper insulation section 3a, the upper slow cooling section 4a, the upper rapid cooling section 5a, the upper outlet displacement chamber 6a, the inlet displacement chamber 1b, the lower heating section 2b, the lower insulation section 3b, the lower slow cooling section 4b, the lower rapid cooling section 5b and the lower outlet displacement chamber 6b are made into unit modules, which can be assembled during assembly, reducing the cost of transportation and installation.

[0044] The sintering process of lithium battery materials is as follows

[0045] The sagger 8 enters the upper entrance replacement chamber 1a and the lower entrance replacement chamber 1b from the outside. After completing ventilation and deoxygenation in the entrance replacement chamber, the sagger 8 enters the upper heating section 2a and the lower heating section 2b respectively. The lithium battery material in the sagger 8 is heated by the upper heating section 2a and the lower heating section 2b, and then moves to the upper insulation section 3a and the lower insulation section 3b for sintering and forming. After sintering, the sagger 8 enters the upper slow cooling section 4a and the lower slow cooling section 4b for cooling, and then enters the upper rapid cooling section 5a and the lower rapid cooling section 5b to cool to the set kiln outlet temperature. The sagger 8 that has completed cooling enters the upper outlet replacement chamber 6a and the lower outlet replacement chamber 6b, and is sent out of the roller kiln after ventilation.

[0046] Embodiment 2

[0047] like Figure 7 As shown, this embodiment also discloses a stacked structure lithium battery roller, wherein a partition 23 is provided between the upper heating section 2a and the lower heating section 2b, and the partition 23 is fixed on the frame 24. The partition 23 is made of refractory material, so that the upper and lower layers can be used separately, and the kiln is more flexible to use.

[0048] According to the disclosure and teaching of the above description, the technical personnel in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes of the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A double-layer lithium battery roller kiln, characterized in that: The invention comprises a first roller unit (a) and a second roller unit (b), wherein the first roller unit (a) is stacked on the second roller unit (b), wherein the first roller unit (a) comprises an upper inlet displacement chamber (1a), an upper heating section (2a), an upper heat preservation section (3a), an upper slow cooling section (4a), an upper rapid cooling section (5a) and an upper outlet displacement chamber (6a) which are connected in sequence, and the second roller unit (b) comprises a lower inlet displacement chamber (1b), a lower heating section (2b), a lower heat preservation section (3b), a lower slow cooling section (4b), a lower rapid cooling section (5b) and a lower outlet displacement chamber (6b) which are connected in sequence, and each section in the first roller unit (a) and the second roller unit (b) is connected or disconnected.

2. The double-layer lithium battery roller kiln according to claim 1, characterized in that: The upper inlet displacement chamber (1a) is opposite to the lower inlet displacement chamber (1b), the upper temperature rising section (2a) is opposite to the lower temperature rising section (2b), the upper insulation section (3a) is opposite to the lower insulation section (3b), the upper slow cooling section (4a) is opposite to the lower slow cooling section (4b), the upper rapid cooling section (5a) is opposite to the lower rapid cooling section (5b), and the upper outlet displacement chamber (6a) is opposite to the lower outlet displacement chamber (6b).

3. The double-layer lithium battery roller kiln according to claim 1, characterized in that: The upper inlet displacement chamber (1a) is opposite to the lower outlet displacement chamber (6b), the upper temperature rising section (2a) is opposite to the lower rapid cooling section (5b), the upper heat preservation section (3a) is opposite to the lower slow cooling section (4b), the upper slow cooling section (4a) is opposite to the lower temperature preservation section (3b), the upper rapid cooling section (5a) is opposite to the lower temperature rising section (2b), and the upper outlet displacement chamber (6a) is opposite to the lower inlet displacement chamber (1b).

4. The double-layer lithium battery roller kiln according to claim 3 is characterized in that: It also comprises a partition layer (7), wherein the partition layer (7) is arranged between the first roller unit (a) and the second roller unit (b).

5. The double-layer lithium battery roller kiln according to claim 2 or 3, characterized in that: The first roller unit (a) and the second roller unit (b) have the same structure. The upper temperature rising section (2a) comprises a first heating element (21) and a first conveying roller (22). The lower temperature rising section (2b) comprises a second heating element (25) and a second conveying roller (26). The first conveying roller (22) is sequentially arranged in the upper temperature rising section (2a). The first heating element (21) is arranged on the inner wall of the upper temperature rising section (2a). The second conveying roller (26) is sequentially arranged in the lower temperature rising section (2b). The second heating element (25) is arranged on the inner wall of the lower temperature rising section (2b).

6. The double-layer lithium battery roller kiln according to claim 5, characterized in that: The upper temperature rising section (2a) further comprises a deceleration driver (221), wherein the deceleration driver (221) is arranged on the outer wall of the upper temperature rising section (2a), and the deceleration driver (221) is connected to one end of the first conveying roller (22).

7. The double-layer lithium battery roller kiln according to claim 6, characterized in that: It also includes a smoke exhaust system (91), which is connected to the upper temperature rising section (2a) and the lower temperature rising section (2b) respectively.

8. The double-layer lithium battery roller kiln according to claim 4, characterized in that: The partition (7) is made of refractory material.

9. The double-layer lithium battery roller kiln according to claim 7, characterized in that: It also includes a cooling system (95), wherein the cooling system (95) is respectively connected to the upper quenching section (5a) and the lower quenching section (5b).

10. The double-layer lithium battery roller kiln according to claim 1, characterized in that: The first roller unit (a) and the second roller unit (b) are installed in a modular structure.

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