Lithium battery positive and negative electrode material pneumatic conveying device based on electrostatic effect

Abstract

The invention discloses a lithium battery positive and negative electrode material pneumatic conveying device based on an electrostatic effect, which comprises a lithium battery material, a fluidized bed dryer and a central control processing system, the fluidized bed dryer and the pneumatic conveying device are electrically connected with the central control processing system to receive a control instruction; a lithium battery material enters the fluidized bed dryer, so that the lithium battery material can be fully dried and is easier to carry electrons, the dried material falls into the electrostatic chamber and is enabled to carry positive charges through the electrostatic device, when the quantity in the bin pump reaches the material level, material falling is stopped, and high-pressure gas is injected into the bin pump through the high-pressure gas supply device; the first high-pressure air pipe and the first high-pressure air pipe are arranged at the feeding pipe and conveyed to the storage bin along the feeding pipe, the first high-pressure air pipe and the first high-pressure air pipe repel each other due to positive charges, blockage is reduced, the second high-pressure air pipe and the X-ray detector are arranged at the turning position, blockage can be solved in time, and materials can be smoothly conveyed to the storage bin.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic conveying, and in particular to a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect. Background Art

[0002] At present, the lithium battery positive and negative electrode material preparation industry cannot do without the raw material powder transportation and processing. In the process of material powder transportation, in order to avoid dust pollution during transportation, the production quality of the product is seriously affected. Therefore, now the powder is mostly transported by pneumatic means in sealed pipes. Pneumatic conveying is a method of transporting powder and granular materials from one place to another in a closed pipe by wind. It has the advantages of small footprint, less dust, and less infrastructure investment. It has become a link in the production process. While transporting materials, it can also perform operations such as crushing, grading, drying, heating, and cooling.

[0003] Due to the limited conveying space of the pneumatic conveying system pipeline and the differences in the properties of different powder materials, when conveying powder materials that are relatively wet, sticky, have a large specific gravity, and have poor air permeability, or when the air flow velocity is reduced, a large number of particles will be separated and deposited at the bottom of the pipeline. These particles will slide or accumulate along the pipeline. When they accumulate to a certain extent, they will form a "small sand dune" and move forward. When this small sand dune encounters local resistance, it will cause blockage.

[0004] At present, pipeline blockage is one of the most common and most difficult to handle faults faced by pneumatic conveying systems, accounting for more than 60% of the failure rate of pneumatic conveying systems. In addition, due to the long pipelines of the conveying system, maintenance is very difficult. In severe cases, it takes 7-8 hours to clear the pipeline each time, which not only seriously affects the normal operation of the powder material handling system, but also has high maintenance costs.

[0005] Therefore, it is urgent to develop a pneumatic conveying device for powder material transportation that is not easy to be blocked, reduce the occurrence rate of failures, and improve production efficiency. Summary of the invention

[0006] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on the electrostatic effect.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A pneumatic conveying device for lithium battery positive and negative electrode materials based on electrostatic effect, including lithium battery materials, a fluidized bed dryer and a central control processing system. A pneumatic conveying device is also provided at one end of the fluidized bed dryer. The fluidized bed dryer and the pneumatic conveying device are electrically connected to the central control processing system to receive control instructions. The pneumatic conveying device includes an electrostatic chamber, a bin pump and a storage bin. A feeding pipe for conveying lithium battery materials is provided between the fluidized bed dryer, the electrostatic chamber and the bin pump. A pneumatic conveying pipeline is provided between the bin pump and the storage bin. The lithium battery material passes through the fluidized bed dryer, the electrostatic chamber and the bin pump in sequence and enters the storage bin.

[0009] As a preferred solution, the fluidized bed dryer comprises a fluidized bed body, a blower, a heater, an induced draft fan and a cyclone separator, the fluidized bed body is provided with a feed port and a discharge port, the discharge port, the cyclone separator and the electrostatic chamber are connected through a feed pipe, the blower and the heater are arranged on one side of the fluidized bed body, the induced draft fan and the cyclone separator are arranged on the other side of the fluidized bed body, the fluidized bed body and the cyclone separator are connected through a feed pipe, and an air supply pipe for gas flow is further provided between the blower, the heater, the induced draft fan, the cyclone separator and the fluidized bed body, the air supply pipe comprising an air inlet pipe and an exhaust pipe;

[0010] The blower introduces gas and heats and dries it through the heater, and then inputs it into the fluidized bed body to dry the lithium battery material. After the lithium battery material is dried, the lithium battery material is transported to the electrostatic chamber through the discharge port, and the gas in the fluidized bed body and the remaining lithium battery material are transported to the cyclone separator for gas separation and the gas is discharged from the induced draft fan. The remaining lithium battery material is then reprocessed by the cyclone separator and then transported to the electrostatic chamber.

[0011] As a preferred embodiment, the fluidized bed body is configured as a cylindrical structure, and an air equalizing plate is provided in the fluidized bed body, the air equalizing plate is arranged at the inner lower end of the fluidized bed body and divides the interior of the cylinder into two chambers, the air equalizing plate is provided with a plurality of air holes distributed in a circumferential array, the feed port is arranged at the middle and upper part of the fluidized bed body, the discharge port is arranged in the middle position of the fluidized bed body and is connected to the feed pipe, the air inlet pipe is arranged at the lower end of the fluidized bed body and is connected to the blower and the heater, which is used to heat the incoming gas and feed it into the fluidized bed body to blow the lithium battery material upward, one end of the feed pipe between the fluidized bed body and the cyclone separator is connected to the upper end of the fluidized bed body, and the other end is connected to the upper outer end of the cyclone separator, the upper end of the cyclone separator is connected to the induced draft fan through an exhaust pipe, so as to discharge the internal gas to the outside, and the lower end of the cyclone separator is connected to the upper end of the electrostatic chamber through a feed pipe, which is used for the remaining lithium battery material to be reprocessed and then transported to the electrostatic chamber for processing.

[0012] As a preferred embodiment, an electrostatic device is provided in the electrostatic chamber, and the electrostatic device is arranged at the middle end of the electrostatic chamber to apply positively charged electrons to the lithium battery materials falling from above, so that the positively charged electrons are evenly attached to each lithium battery material and have a certain repulsive force between them, thereby maintaining a certain spacing distance.

[0013] As a preferred solution, the electrostatic device includes a motor, a plastic roller, a rubber belt, a glass cylinder and a metal ball. The plastic roller is mounted on a rotating shaft extending from the front end of the motor and rotates therewith. One end of the glass cylinder is connected to the metal ball and is arranged on one side of the plastic roller. One end of the rubber belt is sleeved on the plastic roller, and the other end passes through the glass cylinder and extends into the metal ball. The rubber belt is also provided with a metal needle protruding upward, and the metal needle extends into the metal ball and is connected to the inner wall of the metal ball, so as to transfer static electricity to the metal ball and transfer positively charged electrons to the lithium battery material at the outer end through the metal ball.

[0014] The electrostatic device is a paradigm generator.

[0015] As a preferred solution, a first control valve is further provided between the electrostatic chamber and the silo pump, and the first control valve is installed on the feeding pipe to limit the lithium battery material with positively charged electrons in the electrostatic chamber from falling downward; a second control valve is further provided at the lower end of the silo pump and installed on the pneumatic conveying pipeline to limit the lithium battery material in the silo pump from being conveyed to the storage silo;

[0016] When there is no lithium battery material in the silo pump, the second control valve will be closed, thereby opening the first control valve to allow the lithium battery material in the electrostatic chamber to fall into it. When a certain amount of lithium battery material is stored in the silo pump, the first control valve will be closed and the second control valve will be opened to transport the lithium battery material to the storage silo.

[0017] As a preferred solution, the lower end of the electrostatic chamber is connected to the upper end of the silo pump through a feeding pipe, so that the lithium battery material with positively charged electrons falls into the silo pump and is stacked. The upper and lower ends of the silo pump are provided with a level meter, which is transversely installed at the side end of the silo pump and extends a probe into the silo pump to sense the height and quantity of the lithium battery material accumulated in the silo pump. The probe of the level meter also has a temperature sensor and a humidity sensor;

[0018] The material level meter is a double-rod vibrating rod material level switch. The probe of the double-rod vibrating rod material level switch adopts a double-tube structure so that the inner and outer tubes are at the same frequency. When the outer tube of the probe contacts the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system.

[0019] As a preferred solution, a high-pressure gas supply device is further provided on one side of the silo pump, and a first high-pressure gas pipe is provided between the high-pressure gas supply device and the silo pump to connect the two. When the second control valve is opened, the high-pressure gas supply device will inject high-pressure gas into the silo pump through the first high-pressure gas pipe, so that the lithium battery material is transported backward along the pneumatic conveying pipeline to the storage silo;

[0020] A second high-pressure air pipe is also provided between the high-pressure air supply device and the pneumatic conveying pipeline. The second high-pressure air pipe is used to connect the high-pressure air supply device and the turning point of the pneumatic conveying pipeline. When the turning point of the pneumatic conveying pipeline is congested, the second high-pressure air pipe will supply high-pressure gas to it, so that the accumulated lithium battery materials can be quickly cleared and transported backward.

[0021] As a preferred solution, the first high-pressure gas pipe and the second high-pressure gas pipe are provided with solenoid valves for controlling the gas delivery state of the high-pressure gas supply device; the first high-pressure gas pipe is also provided with an air pressure flow rate detector for detecting the pressure value and flow rate of the high-pressure gas flowing into the warehouse pump, and uploading the detection data to the central control processing system for analysis and processing.

[0022] As a preferred solution, the upper end of the storage bin is connected to the bin pump through a pneumatic conveying pipeline, an exhaust pipe is also provided at the upper end of the storage bin for exhausting excess air inside, and a discharge valve is provided at the lower end of the storage bin for unloading the internal lithium battery material;

[0023] An X-ray detector is also provided at the bend of the pneumatic conveying pipeline to detect the flow state of the lithium battery material at the bend, and upload the detection data to the central control processing system for analysis and processing, and analyze it in combination with the data of the air pressure flow rate detector, and then issue control instructions to the high-pressure air supply device.

[0024] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0025] The invention provides a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect. The lithium battery materials first enter a fluidized bed dryer so that the lithium battery materials can be fully dried and made to be more likely to carry electrons. Then, the dried lithium battery materials fall into an electrostatic chamber and are made to carry positively charged electrons through an electrostatic device. Then, the dried lithium battery materials fall into a silo pump below for temporary storage. When the amount accumulated in the silo pump reaches the upper material level meter, the material dropping is stopped, and high-pressure gas is injected into the silo pump along a first high-pressure gas pipe through a high-pressure gas supply device, so that the materials are conveyed along a feeding pipe to a storage bin for collection. Since the lithium battery materials all carry positive charges, they repel each other, which can reduce the situation where the materials are blocked at the turning of the pipeline. A second high-pressure gas pipe and an X-ray detector are provided at the turning of the feeding pipe, so that the situation in the pipeline can be monitored in time. Once a blockage is found, high-pressure gas is conveyed to the materials through the second high-pressure gas pipe, thereby solving the blockage, so that the lithium battery materials in the pipeline can be smoothly conveyed to the storage bin at the rear, and can be unloaded and used after being stored to a certain amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the fluidized bed dryer of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the pneumatic conveying device of the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the electrostatic device of the present invention.

[0031] Figure 5 It is a schematic diagram of the cross-sectional structure of the fluidized bed body of the present invention.

[0032] Among them, the reference numerals in the figure are:

[0033] 100, fluidized bed dryer; 110, fluidized bed body; 111, feed port; 112, discharge port; 113, air distribution plate; 114, air vent; 120, blower; 130, heater; 140, induced draft fan; 150, cyclone separator; 200, feed pipe; 300, pneumatic conveying device; 310, electrostatic chamber; 320, silo pump; 330, storage silo; 331, exhaust pipe; 332, discharge valve; 340, electrostatic device; 341, motor; 342, discharge valve; 343, electrostatic device; 344, motor; 345, electrostatic device; 346, motor; 347, electrostatic device; 348, electrostatic device; 349, electrostatic device; 350, electrostatic device; 351, electrostatic device; 352, electrostatic device; 353, electrostatic device; 354, electrostatic device; 355, electrostatic device; 356, electrostatic device; 357, electrostatic device; 358, electrostatic device; 359, electrostatic device; 360, electrostatic device; 361, electrostatic device; 362, electrostatic device; 363, electrostatic device; 364, electrostatic device; 365, electrostatic device; 366, electrostatic device; 367, electrostatic device; 368, electrostatic device; 369, electrostatic device; 370, electrostatic device; 371, electrostatic device; 372, electrostatic device; 373, electrostatic device; 374, electrostatic device; 375, electrostatic device; 376, electrostatic device; 377, electrostatic device; 378, electrostatic device; 379, electrostatic device; 38 2. Plastic roller; 343. Rubber belt; 344. Glass cylinder; 345. Metal ball; 350. First control valve; 360. Second control valve; 370. Material level meter; 400. Air supply pipe; 401. Air intake pipe; 402. Exhaust pipe; 500. High-pressure air supply device; 510. First high-pressure air pipe; 520. Second high-pressure air pipe; 530. Solenoid valve; 540. Air pressure flow rate detector; 550. X-ray detector; 600. Pneumatic conveying pipeline. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] Reference Figure 1 and 3 As shown: A pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect, including lithium battery materials, a fluidized bed dryer 100 and a central control processing system, and a pneumatic conveying device 300 is also provided at one end of the fluidized bed dryer 100, the fluidized bed dryer 100 and the pneumatic conveying device 300 are electrically connected to the central control processing system to receive control instructions, so that the central control processing system can issue instructions to the fluidized bed dryer 100 and the pneumatic conveying device 300 to control the operation, wherein the pneumatic conveying device 300 includes an electrostatic chamber 310, a bin pump 320 and a storage bin 330, and a feeding pipe 200 for conveying lithium battery materials is provided between the fluidized bed dryer 100, the electrostatic chamber 310 and the bin pump 320, and a pneumatic conveying pipeline 600 is provided between the bin pump 320 and the storage bin 330, so that the lithium battery material passes through the fluidized bed dryer 100, the electrostatic chamber 310, the bin pump 320 in sequence and enters the storage bin 330.

[0040] Reference Figure 2 As shown: In this embodiment, the fluidized bed dryer 100 includes a fluidized bed body, a blower 120, a heater 130, an induced draft fan 140 and a cyclone separator 150. A feed port 111 and a discharge port 112 are provided on the fluidized bed body, and the discharge port 112, the cyclone separator 150 and the electrostatic chamber 310 are connected through a feed pipe 200. The blower 120 and the heater 130 are arranged on one side of the fluidized bed body 110, and the induced draft fan 140 and the cyclone separator 150 are arranged on the other side of the fluidized bed body 110, so that the fluidized bed body 110 and the cyclone separator 150 are connected through the feed pipe 200. An air supply pipe 400 for supplying gas flow is also provided between the blower 120, the heater 130, the induced draft fan 140, the cyclone separator 150 and the fluidized bed body 110, wherein the air supply pipe 400 includes an air intake pipe 401 and an exhaust pipe 402.

[0041] Specifically, the lithium battery material enters the fluidized bed body 110 from the feed port 111 thereof, and the gas is introduced through the blower 120 and heated and dried through the heater 130, and then input into the fluidized bed body 110 to dry the internal lithium battery material. After the lithium battery material is dried, the lithium battery material is transported to the electrostatic chamber 310 through the discharge port 112, and the gas and the remaining lithium battery material in the fluidized bed body 110 are transported to the cyclone separator 150. After the cyclone separator 150 separates the gas and the lithium battery material, the gas is discharged from the induced draft fan 140, and the remaining lithium battery material is reprocessed by the cyclone separator 150 and then transported to the electrostatic chamber 310.

[0042] Reference Figure 5 As shown: In this embodiment, the fluidized bed body 110 is configured as a cylindrical structure, and an air distribution plate 113 is provided in the fluidized bed body 110. The air distribution plate 113 is arranged at the inner lower end of the fluidized bed body 110 and divides the interior of the cylinder into two chambers. A plurality of vents 114 distributed in a circumferential array are provided on the air distribution plate 113, and the diameter of the vents 114 on the air distribution plate 113 is larger as they are farther away from the center of the circle, so as to disperse the gas. The feed inlet 111 is arranged in the middle and upper part of the fluidized bed body 110, and the discharge port 111 is arranged at the middle and upper part of the fluidized bed body 110. The inlet 112 is arranged at the middle of the fluidized bed body 110 and connected to the feed pipe 200, so as to form the main feed pipe 200. Then, the air inlet pipe 401 is arranged at the lower end of the fluidized bed body 110 and connected to the blower 120 and the heater 130, so that the gas entering from the outside first passes through the blower 120, and then is heated by the heater 130 and is sent into the fluidized bed body 110 through the air inlet pipe 401, so that the gas can be blown upward to the lithium battery material for drying, and the gas in the fluidized bed body is dried. A feed pipe 200 is provided between the fluidized bed body 110 and the cyclone separator 150 for connecting the two, wherein one end of the feed pipe 200 is connected to the upper end of the fluidized bed body 110, and the other end is connected to the upper outer end of the cyclone separator 150, and is used to transport the residual materials that cannot be discharged from the discharge port 112 to the cyclone separator 150, so that the gas in the fluidized bed body 110 and the remaining lithium battery materials can be transported to the cyclone separator 150 along the upper end of the feed pipe 200, and the upper end of the cyclone separator 150 is connected to the upper end of the cyclone separator 150. By connecting the exhaust duct 402 with the induced draft fan 140, the gas inside the cyclone separator 150 is discharged outward through the exhaust duct 402, and the lower end of the cyclone separator 150 is connected to the upper end of the electrostatic chamber 310 through the feeding pipe 200, so that a secondary feeding pipe 200 is formed between the cyclone separator 150 and the electrostatic chamber 310, which is used for the remaining lithium battery materials to be transported to the electrostatic chamber 310 after reprocessing, and then the dried lithium battery materials are processed by the electrostatic chamber 310.

[0043] Reference Figure 4 As shown: In the present embodiment, an electrostatic device 340 is provided in the electrostatic chamber 310. By arranging the electrostatic device 340 at the middle end of the electrostatic chamber 310, positively charged electrons can be applied to the lithium battery material falling from above, so that the positively charged electrons are evenly attached to each lithium battery material, and a certain repulsive force is created between them, thereby maintaining a certain spacing distance and being stored in the electrostatic chamber 310.

[0044] Specifically, the electrostatic device 340 includes a motor 341, a plastic roller 342, a rubber belt 343, a glass cylinder 344 and a metal ball 345. The plastic roller 342 is installed on the rotating shaft extending from the front end of the motor 341, and the plastic roller 342 can rotate with the motor 341. One end of the glass cylinder 344 is connected to the metal ball 345, and then they are arranged on one side of the plastic roller 342. Then, one end of the rubber belt 343 is put on the plastic roller 342, and the rubber belt 343 is put on the metal ball 345. The other end of the belt 343 passes through the glass cylinder 344 and extends into the metal ball 345. The rubber belt 343 is also provided with a metal needle protruding upward. The metal needle is extended into the metal ball 345 and connected to the inner wall of the metal ball 345, so that the generated static electricity is transferred to the metal ball 345, and then the static electricity electrons are attached to the outer wall of the metal ball 345, and the positively charged static electricity molecules are transferred to the lithium battery materials through the outer wall of the metal ball 345, so that they all carry positively charged static electricity.

[0045] Furthermore, the electrostatic device 340 used is a paradigm generator 341, which can effectively generate static electricity and transfer it to the electrostatic chamber 310, so that the lithium battery material inside has positively charged electrons.

[0046] In this embodiment, a first control valve 350 is further provided between the electrostatic chamber 310 and the silo pump 320, and the first control valve 350 is installed on the feeding pipe 200 therebetween, so as to limit the lithium battery material with positively charged electrons in the electrostatic chamber 310 from falling downward into the silo pump 320; a second control valve 360 ​​is further provided at the lower end of the silo pump 320, and the second control valve 360 ​​is installed on the pneumatic conveying pipe 600 below the silo pump 320, so as to limit the lithium battery material in the silo pump 320 from being conveyed to the storage silo 330.

[0047] During use, when there is no lithium battery material in the silo pump 320, the second control valve 360 ​​will be closed, thereby opening the first control valve 350 to allow the lithium battery material in the electrostatic chamber 310 to fall into it. When a certain amount of lithium battery material is stored in the silo pump 320, the first control valve 350 will be closed, and the second control valve 360 ​​will be opened to transport the lithium battery material to the storage silo 330.

[0048] In this embodiment, the lower end of the electrostatic chamber 310 is connected to the upper end of the silo pump 320 through the feeding pipe 200, so that the lithium battery material with positively charged electrons falls into the silo pump 320 for stacking. A level meter 370 is provided at the upper and lower ends of the silo pump 320. The level meter 370 is horizontally installed on the side end of the silo pump 320 and a probe is extended into the silo pump 320 to sense the height and quantity of the lithium battery material stacked in the silo pump 320, and to monitor the amount of lithium battery material stored in the silo pump 320 in real time to avoid excessive stacking. The probe of the level meter 370 also has a temperature sensor and a humidity sensor, which can timely sense and detect internal temperature and humidity changes, and upload the measured data.

[0049] Specifically, the level meter 370 used is a double-rod vibrating rod level switch. Since the probe of the double-rod vibrating rod level switch adopts a double-tube structure, under normal circumstances, the inner and outer tubes are at the same frequency. When the outer tube of the probe contacts the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system. The central control processing system then sends a control instruction to the first control valve 350 or the second control valve 360 ​​to allow the lithium battery material to fall into / release from the silo pump 320.

[0050] In this embodiment, a high-pressure gas supply device 500 is provided on one side of the silo pump 320, and a first high-pressure gas pipe 510 is provided between the high-pressure gas supply device 500 and the silo pump 320. The two are connected by the first high-pressure gas pipe 510, so that high-pressure gas can be injected from the first high-pressure gas pipe 510. When the second control valve 360 ​​is opened, the high-pressure gas supply device 500 will inject high-pressure gas into the silo pump 320 through the first high-pressure gas pipe 510, so that the lithium battery material impacted by the high-pressure gas is transported backward along the pneumatic conveying pipe 600 to the storage bin 330, and because the lithium battery material carries positively charged electrons, it will not be easily accumulated in the pneumatic conveying pipe 600.

[0051] Specifically, a second high-pressure air pipe 520 is provided between the high-pressure air supply device 500 and the pneumatic conveying pipeline 600, and the second high-pressure air pipe 520 is connected to the turning point of the high-pressure air supply device 500 and the pneumatic conveying pipeline 600, so that the turning point of the pneumatic conveying pipeline 600 is connected with the second high-pressure air pipe 520. When the turning point of the pneumatic conveying pipeline 600 is blocked by lithium battery materials, high-pressure gas will be transported to the pneumatic conveying pipeline 600 through the second high-pressure air pipe 520, so that the accumulated lithium battery materials can be quickly unblocked. And it is transported backward, and a grounding wire is arranged on the pneumatic conveying pipeline 600 between the silo pump 320 and the storage silo 330, which is used to conduct the positively charged electrons that touch the inner wall of the pipe during the transportation process and introduce them into the ground, and this section of the pneumatic conveying pipeline 600 adopts a long length, which is enough to make the positively charged lithium battery material gradually lose the positively charged electrons during the transportation process, so that the lithium battery material loses all the positively charged electrons before entering the storage silo 330, so that the lithium battery material is in a non-charged state when falling into the storage silo 330.

[0052] In this embodiment, by providing an electromagnetic valve 530 on the first high-pressure gas pipe 510 and the second high-pressure gas pipe 520, the gas delivery state of the high-pressure gas supply device 500 is controlled by the electromagnetic valve 530; and a gas pressure flow rate detector 540 is also provided on the first high-pressure gas pipe 510, which can detect the pressure value and flow rate of the high-pressure gas flowing into the silo pump 320, and upload the detection data to the central control processing system for analysis and processing.

[0053] In this embodiment, the upper end of the storage bin 330 is connected to the bin pump 320 through the pneumatic conveying pipe 600, and an exhaust pipe 331 is also provided on the upper end surface of the storage bin 330. The excess air inside the storage bin 330 can be discharged in time through the exhaust pipe 331, and a discharge valve 332 for discharging internal lithium battery materials is provided at the lower end of the storage bin 330. By controlling the discharge valve 332, the stored lithium battery materials can be discharged in an orderly manner and used for subsequent processing.

[0054] In this embodiment, an X-ray detector 550 is provided at the turning point of the pneumatic conveying pipeline 600. The flow state of the lithium battery material at the turning point can be detected by the X-ray detector 550, and the detection data is uploaded to the central control processing system for analysis and processing, and combined with the data of the air pressure flow rate detector 540 for analysis. When a conveying abnormality occurs, a control instruction is promptly issued to the high-pressure gas supply device 500, and the blockage in the pneumatic conveying pipeline 600 is resolved by high-pressure gas.

[0055] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A pneumatic conveying device for lithium battery positive and negative electrode materials based on electrostatic effect, comprising lithium battery materials, a fluidized bed dryer and a central control processing system, characterized in that: A pneumatic conveying device is also provided at one end of the fluidized bed dryer. Both the fluidized bed dryer and the pneumatic conveying device are electrically connected to the central control processing system to receive control instructions. The pneumatic conveying device includes an electrostatic chamber, a bin pump and a storage bin. A feeding pipe for conveying lithium battery materials is provided between the fluidized bed dryer, the electrostatic chamber and the bin pump. A pneumatic conveying pipeline is provided between the bin pump and the storage bin. The lithium battery material passes through the fluidized bed dryer, the electrostatic chamber and the bin pump in sequence and enters the storage bin.

2. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 1 is characterized in that: The fluidized bed dryer comprises a fluidized bed body, a blower, a heater, an induced draft fan and a cyclone separator, the fluidized bed body is provided with a feed port and a discharge port, the discharge port, the cyclone separator and the electrostatic chamber are connected through a feed pipe, the blower and the heater are arranged on one side of the fluidized bed body, the induced draft fan and the cyclone separator are arranged on the other side of the fluidized bed body, the fluidized bed body and the cyclone separator are connected through a feed pipe, and an air supply pipe for gas flow is also provided between the blower, the heater, the induced draft fan, the cyclone separator and the fluidized bed body, the air supply pipe comprises an air inlet pipe and an exhaust pipe; The blower introduces gas and heats and dries it through the heater, and then inputs it into the fluidized bed body to dry the lithium battery material. After the lithium battery material is dried, the lithium battery material is transported to the electrostatic chamber through the discharge port, and the gas in the fluidized bed body and the remaining lithium battery material are transported to the cyclone separator for gas separation and the gas is discharged from the induced draft fan. The remaining lithium battery material is then reprocessed by the cyclone separator and then transported to the electrostatic chamber.

3. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 2 is characterized in that: The fluidized bed body is configured as a cylindrical structure, and an air equalizing plate is provided in the fluidized bed body. The air equalizing plate is arranged at the inner lower end of the fluidized bed body and divides the interior of the cylinder into two chambers. The air equalizing plate is provided with a plurality of air holes distributed in a circumferential array. The feed port is arranged at the middle and upper part of the fluidized bed body, and the discharge port is arranged at the middle position of the fluidized bed body and is connected to the feed pipe. The air inlet pipe is arranged at the lower end of the fluidized bed body and is connected to the blower and the heater, and is used for heating the incoming gas and feeding it into the fluidized bed body to blow the lithium battery material upward. One end of the feed pipe between the fluidized bed body and the cyclone separator is connected to the upper end of the fluidized bed body, and the other end is connected to the upper outer end of the cyclone separator. The upper end of the cyclone separator is connected to the induced draft fan through an exhaust pipe, so as to discharge the internal gas outward. The lower end of the cyclone separator is connected to the upper end of the electrostatic chamber through a feed pipe, and is used for the remaining lithium battery material to be transported to the electrostatic chamber for processing after reprocessing.

4. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 2 is characterized in that: An electrostatic device is provided in the electrostatic chamber, and the electrostatic device is arranged at the middle end of the electrostatic chamber to apply positively charged electrons to the lithium battery materials falling from above, so that the positively charged electrons are evenly attached to each lithium battery material and have a certain repulsive force between them, thereby maintaining a certain spacing distance.

5. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 4 is characterized in that: The electrostatic device includes a motor, a plastic roller, a rubber belt, a glass cylinder and a metal ball. The plastic roller is installed on a rotating shaft extending from the front end of the motor and rotates with the rotating shaft. One end of the glass cylinder is connected to the metal ball and is arranged on one side of the plastic roller. One end of the rubber belt is sleeved on the plastic roller, and the other end passes through the glass cylinder and extends into the metal ball. The rubber belt is also provided with a metal needle protruding upward, and the metal needle extends into the metal ball and is connected to the inner wall of the metal ball, so as to transfer static electricity to the metal ball and transfer positively charged electrons to the lithium battery material at the outer end through the metal ball. The electrostatic device is a paradigm generator.

6. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 4 is characterized in that: A first control valve is also provided between the electrostatic chamber and the silo pump, and the first control valve is installed on the feeding pipe to limit the lithium battery material with positively charged electrons in the electrostatic chamber from falling downward; a second control valve is also provided at the lower end of the silo pump and installed on the pneumatic conveying pipeline to limit the lithium battery material in the silo pump from being conveyed to the storage silo; When there is no lithium battery material in the silo pump, the second control valve will be closed, thereby opening the first control valve to allow the lithium battery material in the electrostatic chamber to fall into it. When a certain amount of lithium battery material is stored in the silo pump, the first control valve will be closed and the second control valve will be opened to transport the lithium battery material to the storage silo.

7. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 6 is characterized in that: The lower end of the electrostatic chamber is connected to the upper end of the silo pump through a feeding pipe, so that the lithium battery material with positively charged electrons falls into the silo pump and is stacked. The upper and lower ends of the silo pump are provided with a level meter, which is transversely installed at the side end of the silo pump and extends a probe into the silo pump to sense the height and quantity of the lithium battery material accumulated in the silo pump. The probe of the level meter is also provided with a temperature sensor and a humidity sensor; The material level meter is a double-rod vibrating rod material level switch. The probe of the double-rod vibrating rod material level switch adopts a double-tube structure so that the inner and outer tubes are at the same frequency. When the outer tube of the probe contacts the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system.

8. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 7 is characterized in that: A high-pressure gas supply device is also provided on one side of the silo pump. A first high-pressure gas pipe is provided between the high-pressure gas supply device and the silo pump to connect the two. When the second control valve is opened, the high-pressure gas supply device will inject high-pressure gas into the silo pump through the first high-pressure gas pipe, so that the lithium battery material is transported backward along the pneumatic conveying pipeline to the storage silo. A second high-pressure air pipe is also provided between the high-pressure air supply device and the pneumatic conveying pipeline. The second high-pressure air pipe is used to connect the high-pressure air supply device and the turning point of the pneumatic conveying pipeline. When the turning point of the pneumatic conveying pipeline is congested, the second high-pressure air pipe will supply high-pressure gas to it, so that the accumulated lithium battery materials can be quickly cleared and transported backward.

9. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 8 is characterized in that: The first high-pressure gas pipe and the second high-pressure gas pipe are provided with solenoid valves for controlling the gas delivery state of the high-pressure gas supply device; the first high-pressure gas pipe is also provided with a gas pressure flow rate detector for detecting the pressure value and flow rate of the high-pressure gas flowing into the warehouse pump, and uploading the detection data to the central control processing system for analysis and processing.

10. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 9 is characterized in that: The upper end of the storage bin is connected to the bin pump through a pneumatic conveying pipeline. An exhaust pipe is also provided at the upper end of the storage bin to discharge the excess air inside. The lower end of the storage bin is provided with a discharge valve for unloading the internal lithium battery material. An X-ray detector is also provided at the bend of the pneumatic conveying pipeline to detect the flow state of the lithium battery material at the bend, and upload the detection data to the central control processing system for analysis and processing, and analyze it in combination with the data of the air pressure flow rate detector, and then issue control instructions to the high-pressure air supply device.

Images