Sagger cover and sagger
By designing the outer folding and inner baffle structure of the scaffold cover, the problem of reactants overflow during the synthesis of lithium-ion positive electrode material is solved, effective settlement of particles is achieved, and production efficiency and equipment life are improved.
Patent Information
- Application Number
- CN202421422070.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-20
AI Technical Summary
During the high-temperature solid-phase synthesis of lithium-ion positive electrode materials, the gas generated by the decomposition of reactants drives particles to overflow the silo, resulting in waste of raw materials, reduced yield and shortened equipment maintenance cycle.
A cassette cover is designed, with the upper and lower cover structures including a back-shaped outer folding and inner baffle plate, exhaust holes and gas passages through which particles in the gas gradually settle in a multiple directional change and extended transmission path.
It effectively reduces reactant spillage, improves production cleanliness and safety, extends the maintenance cycle of the kiln, reduces equipment maintenance and cleaning costs, and improves economic benefits.
Smart Images
Figure CN222733350U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of material reaction container design, and in particular relates to a sagger cover and a sagger used for preventing positive electrode material reactants from overflowing. Background Art
[0002] When synthesizing lithium-ion positive electrode materials in a roller kiln using a high-temperature solid phase method, the mixed reactants need to be placed in a sagger. Driven by rollers, the sagger passes through the heating zone, constant temperature zone, and cooling zone in sequence. During this process, when glucose, lithium carbonate, etc. in the reactants reach the decomposition temperature, a decomposition reaction occurs, generating a large amount of gas. When the gas rises to the surface of the reactants, it collides with the reactants near the top layer, thereby taking small particles out of the sagger.
[0003] Part of the particles entering the roller kiln will be sucked into the exhaust pipe, and the other part will settle inside the roller kiln under the action of gravity. The particles falling on the heating rod will prevent the internal heat transfer, causing the local temperature of the heating rod to be too high, resulting in melting, and the particles falling inside the roller kiln will shorten the maintenance cycle of the equipment. Since the reactants overflow from the sagger, not only the raw materials are wasted and the output is reduced, but also the maintenance cycle of the roller kiln is shortened, increasing the maintenance cost. Utility Model Content
[0004] The utility model aims to effectively reduce the overflow of positive electrode material reactants, and provides a sagger cover and a sagger using the sagger cover. By designing the structure of the sagger cover, when the gas generated by the positive electrode material reaction flows in the sagger cover, the particles in the gas are affected by the sagger cover structure and settle in the sagger cover under the action of their own gravity.
[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:
[0006] A sagger cover comprises a sagger upper cover (10) and a sagger lower cover (20);
[0007] The bottom surface of the sagger upper cover (10) is provided with a square frame-shaped upper cover outer baffle (11) and an upper cover inner baffle (12) perpendicular to the bottom surface, the upper cover outer baffle (11) surrounds the outer side of the upper cover inner baffle (12), and the two are concentric and form a U-shaped;
[0008] A through-going exhaust hole (13) is provided in the area between the upper cover outer baffle (11) and the upper cover inner baffle (12) of the sagger upper cover (10);
[0009] The top surface of the sagger lower cover (20) is provided with a square frame-shaped lower cover outer baffle (21) and a lower cover inner baffle (22) perpendicular to the top surface, the lower cover outer baffle (21) surrounds the outer side of the lower cover inner baffle (22), and the two are concentric and form a U-shaped;
[0010] A penetrating gas passage (23) is provided in the central area of the inner side of the baffle plate (22) of the lower cover of the sagger (20);
[0011] When the sagger upper cover (10) and the sagger lower cover (20) are matched with each other, the upper cover outer baffle (11), the upper cover inner baffle (12) and the lower cover outer baffle (21), the lower cover inner baffle (22) are opposite and staggered, and gaps are left between the bottom surface of the sagger upper cover (10), the upper cover outer baffle (11), the upper cover inner baffle (12) and the top surface of the sagger lower cover (20), the lower cover outer baffle (21), and the lower cover inner baffle (22).
[0012] Furthermore, the upper cover outer baffle (11) and the upper cover inner baffle (12) have the same height.
[0013] Furthermore, the lower cover outer baffle (21) and the lower cover inner baffle (22) have the same height.
[0014] Furthermore, two exhaust holes (13) are provided on the sagger upper cover (10), and the two exhaust holes (13) are symmetrical with respect to the center of the sagger upper cover (10).
[0015] Furthermore, the gas passage (23) of the sagger lower cover (20) is a rectangular passage.
[0016] Furthermore, a lower baffle plate (24) is provided on the periphery of the bottom surface of the sagger lower cover (20), and the lower baffle plate (24) is perpendicular to the top surface of the sagger lower cover (20).
[0017] Furthermore, the bottom surface of the sagger lower cover (20) is an inclined slope surface (25).
[0018] Furthermore, the slope of the slope (25) is 1:10.
[0019] A sagger comprises the above-mentioned sagger cover and a sagger body (30), wherein the sagger cover is detachably covered on a port of the sagger body (30);
[0020] The periphery of the sagger upper cover (10) covers the end of the sagger body (30), and the outer baffle plate (11) of the upper cover and the inner baffle plate (12) of the upper cover face the inside of the sagger body (30);
[0021] The sagger lower cover (20) is located inside the sagger body (30), and a gap is left between the periphery of the sagger lower cover (20) and the inner side wall of the sagger body (30).
[0022] Furthermore, the contours of the sagger cover and the sagger body (30) are both square.
[0023] Beneficial effects achieved by the utility model:
[0024] 1. Reduce the overflow of reactants: By designing the structure of the sagger cover, the particles in the gas are gradually settled in the multiple direction changes and extended transmission path, effectively reducing the mass of reactants overflowing the sagger and improving the cleanliness and safety of production.
[0025] 2. Simple structure and easy manufacturing: With the split design, the upper and lower covers of the sagger can be manufactured and assembled independently, which reduces the production cost and manufacturing difficulty and improves the production efficiency.
[0026] 3. Automatic adaptation to loading capacity: The distance between the upper and lower covers of the sagger can be automatically adjusted according to the loading capacity of the reactants to adapt to different production needs, increasing the flexibility and convenience of operation.
[0027] 4. Extend the transmission path and time: When the gas changes direction and extends the path multiple times, the particles settle under the action of inertia and gravity, which provides sufficient time and space for the sedimentation of particles in the gas and further improves the sedimentation efficiency of the particles.
[0028] 5. Wide range of applications: It is suitable for the treatment of various reactants, has broad application prospects, and can meet the production needs of different types and scales.
[0029] 6. Improve kiln maintenance cycle and production efficiency: Since the overflow of reactants is effectively reduced, the pollution and wear frequency of equipment are reduced, thereby extending the kiln maintenance cycle and improving production continuity and efficiency.
[0030] 7. Improved economic benefits: Reduced equipment maintenance and cleaning costs, improved production efficiency, and ultimately increased economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1A It is a top view of the sagger according to an embodiment of the utility model.
[0032] Figure 1B yes Figure 1A Cross-sectional view of the middle sagger along line AA.
[0033] Figure 2A It is a bottom view of the upper cover of the sagger according to an embodiment of the utility model.
[0034] Figure 2B yes Figure 2A Cross-sectional view of the middle sagger cover along line BB.
[0035] Figure 2C yes Figure 2A Cross-sectional view of the middle sagger cover along line CC.
[0036] Figure 3A It is a top view of the lower cover of the sagger according to an embodiment of the present utility model.
[0037] Figure 3B yes Figure 3A Cross-sectional view of the lower cover of the middle sagger along line DD.
[0038] Figure 3C yes Figure 3A Cross-sectional view of the lower cover of the middle sagger along line EE.
[0039] Description of reference numerals:
[0040] 10: Upper cover of the sagger;
[0041] 11: outer baffle of upper cover;
[0042] 12: baffle plate inside the upper cover;
[0043] 13: Exhaust hole;
[0044] 20: Lower cover of sagger;
[0045] 21: outer baffle of lower cover;
[0046] 22: Inner baffle of lower cover;
[0047] 23: Gas channel;
[0048] 24: lower baffle;
[0049] 25: Slope;
[0050] 30: sagger body;
[0051] P1: first path;
[0052] P2: The second path. DETAILED DESCRIPTION
[0053] In order to make the various technical features and advantages or technical effects in the above technical solution of the utility model more obvious and easy to understand, the following is a detailed description with reference to the accompanying drawings.
[0054] This embodiment specifically discloses a sagger cover and a sagger using the sagger cover. Taking a square sagger as an example, the overall structure is as follows: Figure 1A and Figure 1B The sagger comprises a sagger upper cover 10, a sagger lower cover 20 and a sagger body 30, wherein the sagger upper cover 10 and the sagger lower cover 20 constitute a sagger cover. The periphery of the sagger upper cover 10 covers the end of the sagger body 30, and the outer baffle 11 of the upper cover and the inner baffle 12 of the upper cover face the inside of the sagger body 30. The sagger lower cover 20 is located in the sagger body 30, and a gap is left between the periphery of the sagger lower cover 20 and the inner side wall of the sagger body 30.
[0055] FIG. 2A to FIG. 2CIt is a structural diagram of the upper lid 10 of the sagger. On the bottom surface of the upper lid 10 of the sagger, there are provided an upper lid outer baffle 11 and an upper lid inner baffle 12 in the shape of a square frame perpendicular to the bottom surface. The upper lid outer baffle 11 surrounds the outside of the upper lid inner baffle 12. The upper lid outer baffle 11 and the upper lid inner baffle 12 have the same height, and the two are concentric and form a figure-eight shape. In the area between the upper lid outer baffle 11 and the upper lid inner baffle 12 of the upper lid 10 of the sagger, there are provided through exhaust holes 13. In this embodiment, there are two exhaust holes 13 that are centrosymmetric about the center.
[0056] FIG. 3A to FIG. 3C It is a structural diagram of the lower lid 20 of the sagger. On the top surface of the lower lid 20 of the sagger, there are provided a lower lid outer baffle 21 and a lower lid inner baffle 22 in the shape of a square frame perpendicular to the top surface. The lower lid outer baffle 21 surrounds the outside of the lower lid inner baffle 22. The lower lid outer baffle 21 and the lower lid inner baffle 22 have the same height, and the two are concentric and form a figure-eight shape. In the central area inside the lower lid inner baffle 22 of the lower lid 20 of the sagger, there is provided a through rectangular gas channel 23. In addition, a lower baffle 24 is provided on the peripheral edge of the bottom surface of the lower lid 20 of the sagger, and the lower baffle 24 is perpendicular to the top surface of the lower lid 20 of the sagger. The bottom surface of the lower lid 20 of the sagger is an inclined slope 25, and the slope (i.e., the ratio of the vertical height to the horizontal width of the slope 25) is 1:10, and other slopes can also be selected according to actual needs.
[0057] The positions of the upper lid 10 and the lower lid 20 of the sagger when they cooperate with each other are as Figure 1B shown. The upper lid outer baffle 11, the upper lid inner baffle 12 are opposite and offset from the lower lid outer baffle 21 and the lower lid inner baffle 22, and there are gaps between the bottom surface of the upper lid 10 of the sagger, the upper lid outer baffle 11 and the upper lid inner baffle 12 and the top surface of the lower lid 20 of the sagger, the lower lid outer baffle 21 and the lower lid inner baffle 22. Based on this structural and positional design, a first path P1 and a second path P2 for gas to pass through can be formed.
[0058] The known process of the sagger lid and the sagger proposed in this embodiment is as follows:
[0059] The first step: Put an appropriate mass of positive electrode material reactants into the sagger body 30, then put the lower lid 20 of the sagger into the sagger body 30, ensure that the lower baffle 24 of the lower lid 20 of the sagger contacts the reactants, and then cover the upper lid 10 of the sagger. In specific implementation, the relative distance between the upper lid 10 and the lower lid 20 of the sagger can be automatically adjusted according to the loading amount of the reactants.
[0060] The second step: When the temperature of carbon source, lithium carbonate, etc. in the reactants reaches the decomposition temperature, decomposition starts, generating a large amount of gas. Under the action of the buoyancy, the gas will carry out the fine particles with smaller mass from the surface of the reactants and move upward together with the generated gas.
[0061] Step 3: When the gas carrying the reactant particles rises to the bottom surface of the sagger lower cover 20, the movement direction changes under the action of the lower baffle 24 of the sagger lower cover 20. Most of the gas flows horizontally to the gas channel 23 at the center position under the guidance of the bottom slope 25 of the sagger lower cover 20, forming Figure 1B The first path P1 shown in FIG. 1 ; another small portion of the gas flows through the lower baffle 24 toward the inner wall of the sagger to form Figure 1B In the process, under the action of gravity, a part of the particles in the gas directly settles into the sagger body 30.
[0062] Step 4: Reference Figure 1B For the first path P1, after the gas passes vertically through the gas channel 23 of the sagger lower cover 20, it is restricted by the baffle plate 22 inside the lower cover and moves vertically upward until it meets the bottom surface of the sagger upper cover 10; then it changes its movement direction and moves downward under the restriction of the baffle plate 22 inside the lower cover and the baffle plate 11 outside the upper cover until it meets the top surface of the sagger lower cover 20; then it changes its direction and moves upward under the restriction of the baffle plate 12 inside the upper cover and the baffle plate 21 outside the lower cover, and finally it is discharged from the exhaust hole 13. For the second path P2, under the restriction of the inner wall of the sagger body 30 and the lower baffle 24 of the sagger lower cover 20, the direction of movement changes from horizontal to vertical upward, and after entering the gap, it moves to the bottom surface of the sagger upper cover 10, and then changes direction and moves downward under the restriction of the upper cover outer baffle 11, and then changes the direction of movement again when reaching the top surface of the sagger lower cover 20. Under the restriction of the upper cover outer baffle 11 and the lower cover outer baffle 21, the gas moves upward and is finally discharged from the exhaust hole 13. Among them, when the gas moves upward through the exhaust hole 13, the particles in the gas will further settle on the top surface of the sagger lower cover 20. It can be seen that the gas will change direction many times under the restriction of different baffles of the sagger upper cover 10 and the sagger lower cover 20 through the two paths, which prolongs the transmission path and transmission time. In this process, the particles in the gas will partially settle on the top surface of the sagger lower cover 20 under the action of inertia and gravity, providing sufficient time and space for the sedimentation of the particles in the gas.
[0063] Although the utility model has been disclosed as above in the form of embodiments, it is not intended to limit the utility model. Appropriate modifications or equivalent substitutions of the technical solutions of the utility model made by ordinary technicians in the field should be included in the protection scope of the utility model. The protection scope of the utility model shall be based on that defined in the claims.
Claims
1. A sagger cover, characterized in that: It comprises a sagger upper cover (10) and a sagger lower cover (20); The bottom surface of the sagger upper cover (10) is provided with a square frame-shaped upper cover outer baffle (11) and an upper cover inner baffle (12) perpendicular to the bottom surface, the upper cover outer baffle (11) surrounds the outer side of the upper cover inner baffle (12), and the two are concentric and form a U-shaped; A through-going exhaust hole (13) is provided in the area between the upper cover outer baffle (11) and the upper cover inner baffle (12) of the sagger upper cover (10); The top surface of the sagger lower cover (20) is provided with a square frame-shaped lower cover outer baffle (21) and a lower cover inner baffle (22) perpendicular to the top surface, the lower cover outer baffle (21) surrounds the outer side of the lower cover inner baffle (22), and the two are concentric and form a U-shaped; A penetrating gas passage (23) is provided in the central area of the inner side of the baffle plate (22) of the lower cover of the sagger (20); When the sagger upper cover (10) and the sagger lower cover (20) are matched with each other, the upper cover outer baffle (11), the upper cover inner baffle (12) and the lower cover outer baffle (21), the lower cover inner baffle (22) are opposite and staggered, and gaps are left between the bottom surface of the sagger upper cover (10), the upper cover outer baffle (11), the upper cover inner baffle (12) and the top surface of the sagger lower cover (20), the lower cover outer baffle (21), and the lower cover inner baffle (22).
2. The sagger cover according to claim 1, characterized in that: The upper cover outer baffle (11) and the upper cover inner baffle (12) have the same height.
3. The sagger cover according to claim 1, characterized in that: The lower cover outer baffle (21) and the lower cover inner baffle (22) have the same height.
4. The sagger cover according to claim 1, characterized in that: Two exhaust holes (13) are arranged on the sagger upper cover (10), and the two exhaust holes (13) are symmetrical with respect to the center of the sagger upper cover (10).
5. The sagger cover according to claim 1, characterized in that: The gas passage (23) of the sagger lower cover (20) is a rectangular passage.
6. The sagger cover according to claim 1, characterized in that: A lower baffle plate (24) is provided on the periphery of the bottom surface of the sagger lower cover (20), and the lower baffle plate (24) is perpendicular to the top surface of the sagger lower cover (20).
7. The sagger cover according to claim 1, characterized in that: The bottom surface of the sagger lower cover (20) is an inclined slope surface (25).
8. The sagger cover according to claim 7, characterized in that: The slope of the slope surface (25) is 1:
10.
9. A sagger, characterized in that: The sagger cover and the sagger body (30) are comprised of any one of claims 1 to 8, wherein the sagger cover is detachably covered on the port of the sagger body (30); The periphery of the sagger upper cover (10) covers the end of the sagger body (30), and the outer baffle plate (11) of the upper cover and the inner baffle plate (12) of the upper cover face the inside of the sagger body (30); The sagger lower cover (20) is located inside the sagger body (30), and a gap is left between the periphery of the sagger lower cover (20) and the inner side wall of the sagger body (30).
10. The sagger according to claim 9, characterized in that: The contours of the sagger cover and the sagger body (30) are both square.