Spray drying device for lithium titanate electrode material
By setting up an air curtain mechanism in the spray drying device, and using hot air pipes and air curtain nozzles to form an air curtain, the problem of mist droplet adhesion is solved, and uniform drying of lithium titanate electrode material is achieved, thereby improving battery performance.
Patent Information
- Application Number
- CN202423007113.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In existing spray drying equipment, when drying lithium titanate electrode materials, the mist droplets tend to adhere to the inner wall, resulting in incomplete drying, affecting particle uniformity, electrode material uniformity, and consequently, battery life.
An air curtain mechanism is adopted, which forms an annular air curtain through hot air pipes and air curtain nozzles to prevent mist particles from adhering to the inner wall of the drying tank. The height of the air curtain is controlled by the drive component and centrifugal force to ensure the uniformity of dried particles.
It effectively prevents the adhesion of mist particles, ensures the uniformity of dried particles, avoids clumping, and improves the current density and service life of lithium titanate batteries.
Smart Images
Figure CN223628097U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a spray drying machine technical field, concretely is a kind of lithium titanate electrode material's spray drying device. BACKGROUND
[0002] Wet method nanometerization of lithium titanate electrode refers to the particle size of lithium titanate material is controlled at nanometer level by wet chemical method, so as to improve its electrochemical performance, after wet method nanometerization, practical spray drying device is needed to remove moisture and organic solvent to complete drying, granulation process to obtain the lithium titanate electrode material of required particle size.
[0003] In spray drying device, liquid material is sprayed into extremely fine mist particles by atomizer, these mist particles are in full contact with hot air, moisture rapidly vaporizes, so that dry product is obtained, but mist droplets are divergent sprayed from atomizer to all directions, part of droplets is attached to the inner wall of spray drying device under the condition of not completely drying, since the temperature of inner wall of spray drying device is lower, liquid droplet drying speed is reduced by rapid heat exchange with droplet, in this process, mist droplet is continuously merged into droplet, gradually converges into larger droplet until dry into larger dry particles, causing internal moisture and organic solvent of particle to be difficult to dry completely, affecting drying effect.
[0004] Existing spray drying device usually uses scraper to remove particles on the inner wall of spray drying device to avoid dry particle residue, but scraper will hang large dry particles on the inner wall and mix into nanometerized dry particles, affect the uniformity of electrode material particles, and further cause the internal current density of lithium titanate battery to be too large to affect the service life of lithium titanate battery. UTILITY MODEL CONTENTS
[0005] (I) technical problem solved
[0006] In view of the deficiencies of prior art, the utility model provides a kind of lithium titanate electrode material's spray drying device, solve the problem raised in above background art.
[0007] (II) technical scheme
[0008] To achieve the above object, the utility model is realized by the following technical scheme:
[0009] A kind of lithium titanate electrode material's spray drying device, including drying tank body, atomizing nozzle is installed in the middle of the top of drying tank body, the top outer edge of the drying tank body is provided with hot air pipe, the hot air pipe is provided with air curtain mechanism directly below, the air curtain mechanism is fixed on the inner wall upper side of drying tank body.
[0010] Preferably, the air curtain mechanism comprises a mounting shell, a closed ring and an air curtain nozzle, the mounting shell is fixed on the inner wall of the drying tank body, a communication hole is arranged at the upper end of the mounting shell, an annular cavity is arranged in the mounting shell, the hot air pipe is communicated with the annular cavity through the communication hole, the closed ring is slidably arranged in the annular cavity, a plurality of injection holes are arranged on the closed ring, and the air curtain nozzle is connected to the lower side of the closed ring and communicated with the annular cavity through the injection holes.
[0011] Preferably, an installation ring groove is formed on the upper side of the inner wall of the mounting shell, and a driving assembly is rotatably connected in the installation ring groove, the driving assembly comprises an inner ring piece and an outer ring piece, a plurality of driving blades are connected between the inner ring piece and the outer ring piece, and the hot air pipe is arranged directly above the driving blades.
[0012] Preferably, a plurality of centrifugal guide rods are connected between the lower side of the inner ring piece and the outer ring piece, a centrifugal sliding block is slidably connected to the centrifugal guide rod, an inclined sliding table is integrally formed on the lower side of the centrifugal sliding block, a contact rod is connected to the upper side of the closed ring, and the upper end of the contact rod is slidably contacted with the lower side of the inclined sliding table.
[0013] Preferably, a positioning ring groove is formed in the middle of the inner wall of the mounting shell, a supporting ring is slidably arranged in the positioning ring groove, a reset spring is sleeved on the outer side of the contact rod, and the two ends of the reset spring are fixed between the supporting ring and the closed ring.
[0014] Preferably, a guide sliding groove is formed on the lower side of the inclined sliding table, the bottom wall of the guide sliding groove is formed as an inclined surface, the height of the bottom wall of the guide sliding groove gradually decreases from inside to outside, and a guide sliding block matched with the guide sliding groove is arranged on the top of the contact rod.
[0015] Preferably, a limiting ring groove is formed on the lower side of the inner wall of the mounting shell, and the closed ring is slidably arranged in the limiting ring groove.
[0016] (Three) beneficial effects
[0017] The utility model provides a spray drying device of lithium titanate electrode material. Has the following beneficial effects:
[0018] 1、the hot air in the utility model from hot air pipe into annular cavity, and from the air curtain nozzle forms in the inner wall of drying tank body forms injection air current, the hot air passes through hot air pipe and enters annular cavity and will pass through the driving blade in the front, make driving assembly circumferential rotation in mounting shell, and through the pushing effect of guide sliding groove to guide sliding block, make closed ring and air curtain nozzle rotate in the inner wall of drying tank body, make injection air current rotate and form air curtain, can block the misty particle and adhere to the inner wall of drying tank body, guarantee the uniformity of drying particle.
[0019] 2、The centrifugal force generated in the rotation of the driving assembly makes the centrifugal sliding block slide left and right on the centrifugal guide rod, changes the position of the inclined sliding table, the inclined surface of the guide sliding groove extrudes the contact rod, and the height of the closed ring can be changed under the supporting action of the reset spring, the height of the air curtain can be changed according to the height of the mist particles attached to the inner wall of the spray drying device caused by the spraying speed of the atomizing nozzle, and the air curtain can perfectly block the mist particles. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a structure diagram of the spray drying device of the lithium titanate electrode material.
[0021] Figure 2 It is Figure 1 A local enlarged view in the middle of A.
[0022] Figure 3 It is a structure diagram of the air curtain mechanism in the utility model.
[0023] In the figure: 1, drying tank body; 2, atomizing nozzle; 3, hot air pipe; 4, mounting shell; 5, driving assembly; 51, inner ring piece; 52, outer ring piece; 53, driving blade; 6, centrifugal sliding block; 7, closed ring; 8, contact rod; 9, air curtain nozzle; 10, centrifugal guide rod; 11, inclined sliding table; 12, guide sliding groove; 13, supporting ring; 14, reset spring. DETAILED DESCRIPTION
[0024] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.
[0025] As Figure 1 Indicated, the utility model embodiment provides a kind of spray drying device of lithium titanate electrode material, including drying tank body 1, drying tank body 1 top middle is equipped with atomizing nozzle 2, the atomizing nozzle 2 is connected with feed pipe, the top outer edge of the drying tank body 1 is provided with hot air pipe 3, the hot air pipe 3 is connected with pressurized fan, the hot air pipe 3 middle part is equipped with heater, the hot air pipe 3 is provided with air curtain mechanism directly below, and the air curtain mechanism is fixed on the inner wall of drying tank body 1 upside.
[0026] As Figures 1-3As shown, the air curtain mechanism includes a mounting shell 4, a drive assembly 5, a centrifugal sliding block 6, a closed ring 7, a contact rod 8 and an air curtain nozzle 9, the mounting shell 4 is fixed on the inner wall of the drying tank body 1, the upper end of the mounting shell 4 is provided with a communication hole, the communication hole is in contact with the whole lower side of the hot air pipe 3, the mounting shell 4 is provided with an annular cavity, the hot air pipe 3 is communicated with the annular cavity through the communication hole, the lower side of the inner wall of the mounting shell 4 is provided with a limiting ring groove, the closed ring 7 is slidably placed in the limiting ring groove, the closed ring 7 can slide up and down in the limiting ring groove, a plurality of injection holes are provided on the closed ring 7, the sealing between the outer edge of the closed ring 7 and the limiting ring groove is always ensured during the sliding process, hot air can only be discharged from the injection hole, the air curtain nozzle 9 is connected to the lower side of the closed ring 7, the air curtain nozzle 9 is communicated with the annular cavity through the injection hole, hot air is sprayed out of high-speed airflow through the injection hole, and hot air jet can be formed on the inner wall of the drying tank body 1.
[0027] The upper side of the inner wall of the mounting shell 4 is provided with a mounting ring groove, the drive assembly 5 is rotatably connected in the mounting ring groove, the drive assembly 5 includes an inner ring piece 51 and an outer ring piece 52, the outer side wall of the inner ring piece 51 is tangent to the inner side of the communication hole, the inner wall of the outer ring piece 52 is tangent to the outer side of the communication hole, a plurality of drive vanes 53 are connected between the upper side of the inner ring piece 51 and the outer ring piece 52, the drive vanes 53 are inclinedly connected between the inner ring piece 51 and the outer ring piece 52, the hot air pipe 3 is arranged above the drive vanes 53, and the hot air input by the hot air pipe 3 can make the drive vanes 53 drive the drive assembly 5 to rotate circumferentially in the mounting ring groove, thereby providing driving force for the air curtain mechanism to rotate in the mounting shell 4.
[0028] A plurality of centrifugal guide rods 10 are connected between the lower side of the inner ring piece 51 and the outer ring piece 52, the extension direction of the centrifugal guide rod 10 is the same as the radius extension direction of the drying tank body 1, a plurality of positioning sliding grooves are arranged on the outer wall of the centrifugal guide rod 10, the extension direction of the positioning sliding groove is the same as the extension direction of the centrifugal guide rod 10, the centrifugal sliding block 6 is slidably connected to the centrifugal guide rod 10, the inner wall of the centrifugal sliding block 6 is provided with a positioning sliding strip, the lower side of the centrifugal sliding block 6 is integrally provided with an inclined sliding table 11, the upper end of the contact rod 8 is slidably contacted with the lower side of the inclined sliding table 11, the positioning sliding strip and the positioning sliding groove are matched, the centrifugal sliding block 6 can only slide towards the extension direction of the centrifugal guide rod 10 under the action of centrifugal force and cannot be turned over, and the lower side of the inclined sliding block is always pressed on the top of the contact rod 8.
[0029] The middle part of the inner wall of the mounting shell 4 is provided with a positioning ring groove, and a supporting ring 13 is slidably arranged in the positioning ring groove, the positioning ring groove limits the supporting ring 13, so that the positioning ring can slide in the circumferential direction of the positioning ring groove, and cannot slide up and down, and the outer side of the abutting rod 8 is provided with a return spring 14, and the two ends of the return spring 14 are fixed between the supporting ring 13 and the closing ring 7.
[0030] The lower side of the inclined sliding table 11 is provided with a guide sliding groove 12, the extension direction of the guide sliding groove 12 is the same as that of the centrifugal guide rod 10, the bottom wall of the guide sliding groove 12 is provided as an inclined surface, the height of the bottom wall of the guide sliding groove 12 gradually decreases from the inside to the outside, and the top of the abutting rod 8 is provided with a guide sliding block matched with the guide sliding groove 12, the front and rear walls of the guide sliding groove 12 limit and support the front and rear directions of the guide sliding block, and the abutting rod 8, the supporting ring 13 and the closing ring 7 are driven to rotate in the circumferential direction by the inclined sliding table 11 under the action of the driving assembly 5, so that the hot air jet rotates in the circumferential direction, the hot air jet wind curtain is formed, the mist particles are blocked, the mist particles are prevented from adhering to the inner wall of the drying tank body 1 in the dry state, the drying caking is avoided, and the uniformity of the spray drying is ensured.
[0031] Workflow:
[0032] In the utility model, material liquid enters the atomizing nozzle 2 through the feed pipe, and is sprayed outward in a divergent manner at the top of the drying tank body 1 to form shower-shaped spray particles under the action of the atomizing nozzle 2, and the outermost spray particles fall outward in a parabolic shape under the action of the initial velocity of the spray;
[0033] The hot air enters the annular cavity through the communication hole from the hot air pipe 3, and forms a high-speed hot air jet after being accelerated by the wind curtain nozzle 9;
[0034] In the process that the hot air passes through the driving blade 53 from the communication hole, the driving assembly 5 rotates in the mounting ring groove, and under the action of the centrifugal force in the rotating process, the centrifugal sliding block 6 slides in the inner and outer directions of the centrifugal guide rod 10, the abutting rod 8 and the closing ring 7 rotate in the circumferential direction in the mounting shell 4 by the abutting rod 8 being extruded by the inclined sliding table 11 of the bottom of the centrifugal sliding block 6 and the positioning sliding groove of the inclined sliding table 11 abutting the positioning sliding strip, the high-speed hot air jet forms a hot air jet wind curtain, the spray particles are blocked, the spray particles are prevented from adhering to the inner wall of the drying tank body 1, and the uniformity of the drying particles can be ensured.
[0035] Meanwhile, according to the different material atomization spraying speed, the divergence path of the material particles is different, and the height of the attachment to the inner wall of the drying tank 1 is also different, that is, the faster the material atomization speed, the higher the position of the attachment to the inner wall of the drying tank 1, the flow rate of the hot air in the hot air pipe 3 can be changed to change the rotating speed of the driving blade 53, the position of the centrifugal sliding block 6 on the centrifugal guide rod 10 is controlled through the rotating speed of the driving blade 53, the position of the resistance rod 8 is extruded by the inclined surface of the bottom wall of the guide sliding groove 12, the height of the air curtain nozzle 9 can be changed, and the height of the air curtain formed by the hot air jet can be changed, and the hot air jet can just block the spray particles attached to the inner wall of the drying tank 1.
[0036] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A spray drying device for lithium titanate electrode material, comprising a drying tank body, a spray nozzle is installed in the middle of the top of the drying tank body, characterized in that: The outer edge of the top of the drying tank body is provided with a hot air pipe, and a wind curtain mechanism is arranged directly below the hot air pipe and is fixed to the inner wall upper side of the drying tank body.
2. The spray drying device of a lithium titanate electrode material according to claim 1, characterized in that: The wind curtain mechanism comprises a mounting shell, a closed ring and a wind curtain nozzle, the mounting shell is fixed to the inner wall upper side of the drying tank body, a communication hole is arranged on the upper end of the mounting shell, an annular cavity is arranged in the mounting shell, the hot air pipe communicates with the annular cavity through the communication hole, the closed ring is slidingly installed in the annular cavity, a plurality of injection holes are arranged on the closed ring, the wind curtain nozzle is connected to the lower side of the closed ring, and the wind curtain nozzle communicates with the annular cavity through the injection holes.
3. The spray drying device of a lithium titanate electrode material according to claim 2, characterized in that: An installation ring groove is formed in the inner wall upper side of the mounting shell, a driving assembly is rotatably connected in the installation ring groove, the driving assembly comprises an inner ring piece and an outer ring piece, a plurality of driving blades are connected between the upper side of the inner ring piece and the outer ring piece, and the hot air pipe is arranged directly above the driving blades.
4. The spray drying device of a lithium titanate electrode material according to claim 3, characterized in that: A plurality of centrifugal guide rods are connected between the lower side of the inner ring piece and the outer ring piece, centrifugal sliding blocks are slidingly connected to the centrifugal guide rods, inclined sliding platforms are integrally formed on the lower side of the centrifugal sliding blocks, and a contact rod is connected to the upper side of the closed ring.
5. The spray drying device of a lithium titanate electrode material according to claim 4, characterized in that: The outer side of the contact rod is sleeved with a reset spring, and the two ends of the reset spring are fixed between the support ring and the closed ring.
6. The spray drying device of a lithium titanate electrode material according to claim 5, characterized in that: The bottom wall of the guide sliding groove is provided as an inclined surface, the height of the bottom wall of the guide sliding groove gradually decreases from inside to outside, and the top of the contact rod is provided with a guide sliding block matched with the guide sliding groove.
7. The spray drying device of a lithium titanate electrode material according to claim 5, characterized in that: The lower side of the inner wall of the mounting shell is provided with a limiting ring groove, and the closed ring is slidingly placed in the limiting ring groove.