Airflow crushing system applied to sodium ion battery powder
By introducing a pretreatment mechanism into the airflow crushing system, pre-pulverizing and depolymerizing powder, combined with the fine crushing technology of the airflow crusher, the problems of blockage and incomplete crushing of existing equipment when processing large-particle materials are solved, and the problem of existing equipment is realized Efficient powder crushing and safe operation of equipment.
Patent Information
- Application Number
- CN202421081047.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-17
AI Technical Summary
When existing airflow crushing equipment deals with blocked materials with poor fluidity and agglomeration of more than 5cm levels, it is easy to cause the cavity to be stuck in the shell, incomplete crushing, and damage to the equipment.
The pretreatment mechanism includes a mechanical crusher and a buffer silo. The powder is pre-pulverized through a mechanical crusher and depolymerized into good fluid particles below centimeter level. Then it is finely crushed through an airflow crusher to control the gas pressure during the crushing process and Feed quantity.
It effectively solves the problems of equipment blockage and incomplete crushing caused by large-particle materials during the crushing process, ensuring the electrochemical performance of the powder and the safety of the equipment.
Smart Images
Figure CN222490384U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of powder mechanical processing equipment, in particular to an airflow pulverizing system applied to sodium ion battery powder. Background Art
[0002] The powder pulverization system developed based on the characteristics of polyanion materials used in aqueous sodium-ion batteries is crucial to the electrochemical performance of powders during the powder pulverization preparation process. In the process of pulverizing large-particle agglomerated solids, airflow pulverization is currently a widely used method. It has the advantages of high production efficiency, low cost, simple operation, and not easy to introduce impurities, and is suitable for large-scale industrial production.
[0003] However, many standard air flow milling equipment currently uses a certain frequency to transport materials by controlling the quantitative feeding method of the screw. For block materials with poor fluidity and agglomeration exceeding 5cm, the screw conveying method is likely to cause cavity jamming and material blockage. Moreover, even if the powder enters the grinding cavity of the air flow mill, it is not easy to be crushed successfully, resulting in difficulty in deagglomeration of coarse particles, clogging the discharge mesh, causing a sharp increase in internal cavity pressure and damage to the equipment. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model discloses an airflow pulverizing system applied to sodium ion battery powder.
[0005] The technical solution adopted by the utility model is as follows:
[0006] An airflow pulverizing system for sodium ion battery powder, comprising:
[0007] The pretreatment mechanism comprises a mechanical crusher and a buffer silo, wherein the discharge port of the mechanical crusher is connected to the feed port of the buffer silo; the mechanical crusher is provided with a first controller, and the first controller is used to control the rotation speed of the mechanical crusher;
[0008] The main pulverizing mechanism comprises an air flow pulverizer connected to the discharge port of the buffer silo, a second dust removal mechanism connected to the discharge port of the air flow pulverizer, an induced draft fan connected to the clean air outlet of the second dust removal mechanism, and a discharge silo connected to the outlet of the induced draft fan; the discharge silo is provided with a first pressure gauge, the first pressure gauge is used to measure the pressure in the discharge silo; the air flow pulverizer is provided with a second pressure gauge and a second controller, the second pressure gauge is used to measure the gas pressure in the air flow pulverizer, and the second controller is used to control the gas pressure in the air flow pulverizer;
[0009] Among them, the first pressure gauge measures the pressure value of the outlet silo, and the feed amount of the buffer silo is controlled by the first controller; the second pressure gauge measures the gas pressure in the air flow pulverizer, and the gas pressure in the air flow pulverizer is controlled by the second controller.
[0010] In one embodiment of the utility model, the air flow pulverizer includes a pulverizing chamber and a grading chamber located above the pulverizing chamber, the pulverizing chamber is provided with an air inlet and a third feed port, the air inlet is connected to a nozzle, and the nozzle injects airflow into the pulverizing chamber; the grading chamber is provided with a third discharge port and at least one grading component, and the grading component is used to separate coarse particles and fine particles.
[0011] In one embodiment of the present invention, the grading assembly includes a servo motor and a grading impeller connected to an output end of the servo motor.
[0012] In one embodiment of the present invention, the air flow pulverizer is connected to a compressed air machine, and a filter is provided between the air flow pulverizer and the compressed air machine.
[0013] In one embodiment of the utility model, the mechanical crusher includes a crushing chamber provided with a first feed port and a first discharge port, a crushing toothed disc vertically installed in the crushing chamber, and a power unit connected to the crushing toothed disc, and the power unit drives the crushing toothed disc to rotate.
[0014] In one embodiment of the present invention, both the first controller and the second controller are PID controllers.
[0015] In one embodiment of the present invention, a discharge valve is provided at the discharge port of the buffer silo.
[0016] In one embodiment of the present invention, the second dust removal mechanism is a pulse bag dust collector.
[0017] In one embodiment of the present invention, the pre-treatment mechanism further includes a first dust removal mechanism connected to the buffer silo.
[0018] In one embodiment of the present invention, the first dust removal mechanism is a pulse bag dust collector.
[0019] The above technical solution of the utility model has the following advantages compared with the prior art:
[0020] The air flow pulverizing system applied to sodium ion battery powder of the utility model adopts a mechanical crusher to pre-crush the powder, deagglomerate it into particles with good fluidity below the centimeter level and then put it into a buffer silo. According to the pulverizing condition of the air flow crusher, the feed of the mechanical crusher is controlled, and the pulverizing process requirements of the powder can be fully met. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.
[0022] Figure 1 It is a schematic diagram of the airflow pulverizing system used for sodium ion battery powder in the utility model.
[0023] Figure 2 It is a schematic diagram of the planar arrangement of a pulverizer and a buffer silo in the utility model.
[0024] Figure 3 It is a structural schematic diagram of the air flow pulverizer in the utility model.
[0025] Figure 4 It is a structural schematic diagram of the grading components in the utility model.
[0026] Figure 5 It is a schematic diagram of the process of processing powder in the utility model.
[0027] Explanation of the reference numerals in the specification: 10. Mechanical crusher; 20. Buffer silo; 30. First dust removal mechanism; 40. Air flow mill; 401. Crushing chamber; 402. Classification chamber; 403. Air inlet; 404. Third feed inlet; 405. Third discharge port; 406. Classification assembly; 4061. Servo motor; 4062. Classification impeller; 50. Second dust removal mechanism; 60. Discharge valve; 70. Filter; 80. Draft fan. DETAILED DESCRIPTION
[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0029] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.
[0030] Combination Figure 1 and Figure 2 , an airflow pulverizing system for sodium ion battery powder, comprising:
[0031] The pretreatment mechanism includes a mechanical crusher 10 and a buffer silo 20, wherein the discharge port of the mechanical crusher 10 is connected to the feed port of the buffer silo 20; the mechanical crusher 10 is provided with a first controller, and the first controller is used to control the rotation speed of the mechanical crusher 10;
[0032] The main pulverizing mechanism includes an air flow pulverizer 40 connected to the discharge port of the buffer bin 20, a second dust removal mechanism 50 connected to the discharge port of the air flow pulverizer 40, an induced draft fan 80 connected to the clean air outlet of the second dust removal mechanism 50, and a discharge bin connected to the outlet of the induced draft fan 80; the discharge bin is provided with a first pressure gauge, the first pressure gauge is used to measure the pressure in the discharge bin; the air flow pulverizer 40 is provided with a second pressure gauge and a second controller, the second pressure gauge is used to measure the gas pressure in the air flow pulverizer 40, and the second controller is used to control the gas pressure in the air flow pulverizer 40;
[0033] Among them, the first pressure gauge measures the pressure value of the outlet silo, and the feed amount of the buffer silo 20 is controlled by the first controller; the second pressure gauge measures the gas pressure in the air flow pulverizer 40, and the gas pressure in the air flow pulverizer 40 is controlled by the second controller.
[0034] The present embodiment provides an airflow pulverizing system for sodium ion battery powders. The pretreatment mechanism can be used to break and deagglomerate large agglomerates of the powders, thereby preventing problems such as blockage of the air cavity caused by excessively large powder particles in the airflow pulverizing main unit and incomplete particle pulverization. The main pulverizing mechanism uses airflow pulverization to perform fine pulverization control on the powders, reducing the particle size from centimeter-level particles to 1μm-50μm level. The combination of the pretreatment mechanism and the main pulverizing mechanism has wide applicability.
[0035] In this embodiment, the mechanical crusher 10 includes a crushing chamber provided with a first feed port and a first discharge port, a crushing toothed disc vertically mounted in the crushing chamber, and a power unit connected to the crushing toothed disc, and the power unit drives the crushing toothed disc to rotate. Among them, the power unit can be a motor, a first pulley, a second pulley and a synchronous belt, the output end of the motor is connected to the first pulley, the synchronous belt is tensioned on the first pulley and the second pulley, and the second pulley is connected to the crushing toothed disc through a transmission shaft. When the motor is started, the motor drives the first pulley to rotate, the first pulley transmits power to the second pulley through the synchronous belt, and the second pulley drives the crushing toothed disc to rotate. After the material enters the crushing chamber from the first feed port, it is subjected to the centrifugal force generated by the high-speed rotation of the crushing toothed disc, and is violently impacted, collided and sheared by the crushing toothed disc, and is quickly thrown to the outer edge of the tooth ring of the crushing toothed disc and crushed, and the fine material is discharged from the mechanical crusher 10 through the first discharge port.
[0036] In this embodiment, a discharge valve 60 is provided at the discharge port of the buffer bin 20, and the discharge valve 60 is used to control whether the buffer bin 20 discharges materials. The buffer bin 20 and the air flow pulverizer 40 are fed by upper and lower free fall feeding.
[0037] In this embodiment, the pretreatment mechanism also includes a first dust removal mechanism 30 connected to the buffer silo 20. Specifically, the first dust removal mechanism 30 is a pulse bag dust collector, which is composed of a pulse bag dust collector ash hopper, an upper box body, a middle box body, a lower box body and other parts. The upper, middle and lower boxes are chamber structures. During operation, the dust-containing gas enters the ash hopper from the air inlet of the pulse bag dust collector, and the coarse dust particles directly fall into the bottom of the ash hopper. The fine dust particles enter the middle and lower boxes upward with the turning of the air flow. The dust accumulates on the outer surface of the filter bag. The filtered gas enters the upper box body to the clean air outlet and is discharged to the discharge bin through the induced draft fan 80.
[0038] In this embodiment, combined with Figure 3 and Figure 4 The airflow mill 40 includes a grinding chamber 401 and a grading chamber 402 located above the grinding chamber 401. The grinding chamber 401 is provided with an air inlet 403 and a third feed inlet 404. The air inlet 403 is connected to a nozzle located in the grinding chamber 401, and the nozzle injects airflow into the grinding chamber 401. The grading chamber 402 is provided with a third discharge port 405 and at least one grading component 406, and the grading component 406 is used to separate coarse particles and fine particles. The air pressure range of the airflow mill 40 is 0.4MPa-1.2MPa, and the airflow velocity is 2m 3 / min-8m 3 / min; the inner lining of the air flow mill 40 adopts a ceramic gasket to prevent the introduction of foreign matter such as iron powder.
[0039] Specifically, the classification component 406 includes a servo motor 4061 and a classification impeller 4062 connected to the output end of the servo motor 4061. Figure 3 As shown, the air flow mill 40 is provided with three classification assemblies 406 to accelerate the separation of coarse particles and fine particles.
[0040] Furthermore, the air flow pulverizer 40 is connected to the compressed air machine, and a filter 70 is provided between the air flow pulverizer 40 and the compressed air machine. Compressed air is released by the compressed air machine, filtered by the filter 70, and the air flow is injected into the pulverizing chamber 401 by the nozzle. The material enters the pulverizing chamber 401 through the third feed port 404. Under the action of the high-pressure air flow, the materials collide with each other and pulverize. The pulverized materials rise to the classification chamber 402 with the air flow and are sorted by the classification impeller 4062. Fine particles, i.e. qualified materials, pass through the blade gap of the classification impeller 4062 to the second dust removal mechanism 50 for collection, while coarse particles, i.e. unqualified materials, fall back to the pulverizing chamber 401 for further pulverization.
[0041] Among them, the second dust removal mechanism 50 is also a pulse bag dust collector, and its structure and working principle are the same as those of the first dust removal mechanism 30, which will not be repeated here.
[0042] In this embodiment, both the first controller and the second controller are PID controllers.
[0043] like Figure 5 As shown, the working principle of the utility model is as follows:
[0044] The rotation speed of the mechanical crusher 10 is set according to the process requirements to control the feeding speed. In addition, the coarse crushing mechanism is linked with the main crushing mechanism to judge the material crushing situation according to the pressure value of the discharge bin measured by the first pressure gauge and the gas pressure in the air flow crusher 40 measured by the second pressure gauge, thereby determining the feeding rate of the powder in the coarse crushing mechanism.
[0045] The rotation speed of the mechanical crusher 10 is controlled by the first controller and / or the gas pressure in the air flow pulverizer 40 is controlled by the second controller to keep the air flow pulverizer 40 in normal production.
[0046] When an abnormal situation occurs, the airflow pulverizer 40 cannot discharge materials normally, which will cause the gas pressure in the airflow pulverizer 40 to rise. When the second pressure gauge detects that the gas pressure in the airflow pulverizer 40 has reached the upper limit, in order to prevent material blockage, it is necessary to reduce the feed, and the first controller controls the mechanical crusher 10 to reduce the speed by 5%. It should be noted that after each deceleration, it is necessary to wait for 1 minute to wait for the airflow pulverizer 40 to process the accumulated materials to prevent the mechanical crusher 10 from continuously decelerating.
[0047] If the gas pressure in the air flow pulverizer 40 returns to normal, it is necessary to determine whether the rotation speed of the mechanical crusher 10 has reached the set value. If the rotation speed of the mechanical crusher 10 reaches the set value, the current speed is maintained to maintain the normal feeding speed; if the rotation speed of the mechanical crusher 10 is lower than the set value, the first controller controls the mechanical crusher 10 to increase the rotation speed by 5% until the rotation speed of the mechanical crusher 10 reaches the process set value. It should be noted that each increase in the rotation speed needs to be delayed for 1 minute to prevent continuous increase in the feeding speed.
[0048] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.
Claims
1. A gas flow pulverizing system for sodium ion battery powder, characterized in that: include: The pretreatment mechanism comprises a mechanical crusher (10) and a buffer silo (20), wherein the discharge port of the mechanical crusher (10) is connected to the feed port of the buffer silo (20); the mechanical crusher (10) is provided with a first controller, and the first controller is used to control the rotation speed of the mechanical crusher (10); The main pulverizing mechanism comprises an air flow pulverizer (40) connected to the discharge port of the buffer bin (20), a second dust removal mechanism (50) connected to the discharge port of the air flow pulverizer (40), an induced draft fan (80) connected to the clean air outlet of the second dust removal mechanism (50), and a discharge bin connected to the outlet of the induced draft fan (80); the discharge bin is provided with a first pressure gauge, the first pressure gauge is used to measure the pressure in the discharge bin; the air flow pulverizer (40) is provided with a second pressure gauge and a second controller, the second pressure gauge is used to measure the gas pressure in the air flow pulverizer (40), and the second controller is used to control the gas pressure in the air flow pulverizer (40); The first pressure gauge measures the pressure value of the silo, and the first controller controls the feed amount of the buffer silo (20); the second pressure gauge measures the gas pressure in the air flow pulverizer (40), and the second controller controls the gas pressure in the air flow pulverizer (40).
2. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: The air flow pulverizer (40) comprises a pulverizing chamber (401) and a grading chamber (402) located above the pulverizing chamber (401); the pulverizing chamber (401) is provided with an air inlet (403) and a third feed port (404); the air inlet (403) is connected to a nozzle, and the nozzle injects air flow into the pulverizing chamber (401); the grading chamber (402) is provided with a third discharge port (405) and at least one grading component (406); the grading component (406) is used to separate coarse particles and fine particles.
3. The airflow pulverizing system for sodium ion battery powder according to claim 2, characterized in that: The grading component (406) includes a servo motor (4061) and a grading impeller (4062) connected to the output end of the servo motor (4061).
4. The airflow pulverizing system for sodium ion battery powder according to claim 2, characterized in that: The air flow pulverizer (40) is communicated with the compressed air machine, and a filter (70) is provided between the air flow pulverizer (40) and the compressed air machine.
5. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: The mechanical crusher (10) comprises a crushing chamber provided with a first feed port and a first discharge port, a crushing toothed disc vertically mounted in the crushing chamber, and a power unit connected to the crushing toothed disc, wherein the power unit drives the crushing toothed disc to rotate.
6. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: The first controller and the second controller are both PID controllers.
7. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: A discharge valve (60) is provided at the discharge port of the buffer silo (20).
8. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: The second dust removal mechanism (50) is a pulse bag dust collector.
9. The airflow pulverizing system for sodium ion battery powder according to claim 1, characterized in that: The pre-treatment mechanism also includes a first dust removal mechanism (30) connected to the buffer bin (20).
10. The airflow pulverizing system for sodium ion battery powder according to claim 9, characterized in that: The first dust removal mechanism (30) is a pulse bag dust collector.