Reaction furnace apparatus and method for continuously producing lithium anode material

Abstract

The present application relates to the technical field of silicon oxide preparation, and particularly relates to a reaction furnace equipment and method for continuously preparing lithium battery negative electrode material, which comprises the following steps: at least two groups of dust accumulators and material bins are connected with a main reaction furnace; materials are put into the main reaction furnace, the main reaction furnace is heated to a production temperature, one group of dust accumulators and material bins are opened, materials generated in the main reaction furnace can be continuously accumulated on material carriers of the dust accumulators, and a scraper mechanism is used to transport the generated materials from the dust accumulators to the material bins; when the dust accumulators or the material bins of the group reach saturation, another group of dust accumulators and material bins are opened to collect materials, the dust accumulators and the material bins of the group are closed, and are transferred to a cooling area; after cooling, the materials in the dust accumulators and the material bins are collected; at least two groups of dust accumulators and material bins are used for cyclic production, so that continuous production is realized, and production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of silicon oxide preparation technology, and in particular to a reactor equipment and method for continuous preparation of lithium battery anode materials. Background Technology

[0002] Silica nanomaterials possess high theoretical specific capacity and nanoparticle size characteristics, which can reduce drastic volume changes during charging and discharging, making them promising for applications in lithium-ion batteries, semiconductors, and other fields.

[0003] In existing technologies, a rotary precipitation substrate is used to uniformly precipitate silica gas, thereby obtaining silica powder. However, during application, the airflow guide component blows inert gas toward the rotary precipitation substrate, which is rotating simultaneously. Silica powder can only be precipitated when the rotary precipitation substrate rotates to the side facing the airflow guide component, resulting in a reduced precipitation rate of silica powder on the rotary precipitation substrate. Furthermore, this method requires cooling the entire precipitation chamber before peeling off the silica powder deposited on the surface of the rotary precipitation substrate to obtain the silica product. This prevents the silica preparation device from achieving continuous production, reducing the efficiency of silica production.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides a reactor equipment and method for continuous preparation of lithium battery anode materials, thereby effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this invention is: a method for continuously preparing lithium battery anode materials, comprising the following steps:

[0007] At least two dust collection furnaces and material silos are connected to the main reactor.

[0008] Feed materials into the main reactor and heat the main reactor to the production temperature;

[0009] Turn on one set of dust accumulation furnaces and material silos so that the material generated by the main reactor can be continuously accumulated on the material carrier of the dust accumulation furnace, and use a scraper mechanism to transport the material generated by the reaction from the dust accumulation furnace to the material silo.

[0010] When the collection capacity of this group of dust accumulation furnaces or material silos reaches saturation, another group of dust accumulation furnaces and material silos is opened to collect the material, this group of dust accumulation furnaces and material silos is closed and transferred to the cooling zone. After cooling, the material in the dust accumulation furnaces and material silos is collected.

[0011] Use at least two sets of dust accumulation furnaces and material silos for cyclical production;

[0012] When the raw material in the main reactor is lower than the set first threshold, the power of the main reactor is reduced, the main reactor is fed back in, and the main reactor is heated to the production temperature until the set production reaction cycle is reached.

[0013] Furthermore, at least two sets of dust accumulation furnaces and material silos are evacuated before collecting materials.

[0014] Furthermore, the feeding process into the main reactor includes:

[0015] Slowly extend the feed pipe from the feed hopper into the material container of the main reactor;

[0016] Collect the pressure in the feeding hopper and the main reactor. After the pressure is balanced, open the solenoid valve of the feeding hopper.

[0017] Adjust the feeder frequency to control the feeding speed;

[0018] Once the material reaches the set value, close the solenoid valve and then retract the conveying pipe.

[0019] Furthermore, during the feeding and reaction process, the weight of the material containers inside the main reactor is collected to determine the amount of material.

[0020] Furthermore, after reaching the set production reaction cycle, the power of the main reactor is slowly reduced. When the temperature of the main reactor drops to the set second threshold, the power of the main reactor is turned off, and inert protective gas is filled into the main reactor until the overall temperature inside the furnace drops to room temperature. Then, the cooled dust collection furnace is opened to collect the material.

[0021] The present invention also includes a reactor apparatus for the continuous preparation of lithium battery anode materials, comprising:

[0022] The main reactor is used to react the raw materials and generate materials.

[0023] At least two sets of dust accumulation furnaces and material silos are provided. The dust accumulation furnaces are connected to the main reactor and include a material carrier and a scraper mechanism. The material carrier is used to continuously accumulate dust in the material generated in the main reactor, and the scraper mechanism is used to transport the generated material to the material silos.

[0024] A feeding mechanism for feeding materials into the main reactor;

[0025] A shut-off mechanism is provided between the dust accumulation furnace and the main reactor to control the connection between the main reactor and the dust accumulation furnace.

[0026] Furthermore, each set of dust accumulation furnaces and material silos also includes a vacuum pump and a filter. The vacuum pump is connected to the material silo and is used to evacuate the material silo and dust accumulation furnace. The filter is disposed between the vacuum pump and the material silo.

[0027] Furthermore, the feeding mechanism includes:

[0028] A feeding hopper containing raw materials;

[0029] The material conveying pipe is a telescopic structure, which extends into the main reactor during material feeding.

[0030] A solenoid valve is disposed between the feeding hopper and the conveying pipeline.

[0031] Furthermore, the main reactor includes:

[0032] A material container for holding raw materials;

[0033] A heating mechanism is provided at the material container to heat the material container;

[0034] A weighing sensor is used to weigh the material container and determine the amount of raw material inside the material container.

[0035] Furthermore, in each group of dust accumulation furnaces and material silos, multiple dust accumulation furnaces are provided, and multiple dust accumulation furnaces are connected to one material silo, with solenoid valves provided between them.

[0036] The beneficial effects of this invention are as follows: By connecting at least two sets of dust accumulation furnaces and material silos to the main reactor, during production, one or more sets of dust accumulation furnaces and material silos are first opened to continuously accumulate and collect the material generated in the main reactor. When the collection volume reaches saturation, another set of dust accumulation furnaces and material silos is opened to continuously accumulate and collect dust. Then, the saturated dust accumulation furnaces and material silos are transferred to the cooling zone. Forced inert gas cooling or natural cooling can be used during cooling. After cooling to room temperature, the dust accumulation silos are opened for collection, and the material silos are transferred. This cyclical production using at least two sets of dust accumulation furnaces and material silos does not affect the continuous reaction in the main reactor. When the reacted raw material in the main reactor is less than a set first threshold, the power of the main reactor is first reduced, material is added to the main reactor, and then the main reactor is heated to the production temperature, improving production efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of the method of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the device of the present invention;

[0040] Figure 3 A schematic diagram of the main reactor and the feeding mechanism;

[0041] Figure 4 This is a structural diagram of the material silo and vacuum pump;

[0042] Figure 5 This is another structural schematic diagram of the device of the present invention.

[0043] Reference numerals: 1. Main reactor; 11. Material container; 12. Heating mechanism; 2. Dust accumulation furnace; 3. Material silo; 4. Feeding mechanism; 41. Feeding silo; 42. Conveying pipeline; 5. Shut-off mechanism; 51. Solenoid valve; 6. Vacuum pump; 7. Filter. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] like Figure 1 As shown: A method for continuously preparing lithium-ion battery anode materials, comprising:

[0048] At least two sets of dust collection furnaces 2 and material silos 3 are connected to the main reactor 1;

[0049] Feed materials into the main reactor 1 and heat the main reactor 1 to the production temperature, which is 1200~1500 degrees Celsius;

[0050] Turn on one set of dust accumulation furnace 2 and material silo 3 so that the material generated by the main reactor 1 can be continuously accumulated on the material carrier of the dust accumulation furnace 2, and the material generated by the reaction is transported from the dust accumulation furnace 2 to the material silo 3 using a scraper mechanism.

[0051] When the collection volume of the dust accumulation furnace 2 or material silo 3 in this group reaches saturation, another set of dust accumulation furnace 2 and material silo 3 is turned on to collect the material. This set of dust accumulation furnace 2 and material silo 3 is then turned off and transferred to the cooling zone. After cooling, the material in the dust accumulation furnace 2 and material silo 3 is collected.

[0052] Circular production is carried out using at least two sets of dust accumulation furnaces 2 and material silos 3;

[0053] When the raw material in the main reactor 1 is lower than the set first threshold, the power of the main reactor 1 is reduced, so that the temperature of the main reactor 1 drops to about 1000 degrees Celsius, and the main reactor 1 is fed back into the main reactor 1. Then the main reactor 1 is heated up to the production temperature until the set production reaction cycle is reached.

[0054] By connecting at least two sets of dust accumulation furnaces 2 and material silos 3 to the main reactor 1, during production, one or more sets of dust accumulation furnaces 2 and material silos 3 are first turned on to continuously accumulate and collect the material generated in the main reactor 1. When the collection volume reaches saturation, another set of dust accumulation furnaces 2 and material silos 3 is turned on to continuously accumulate and collect the material. Then, the saturated dust accumulation furnaces 2 and material silos 3 are transferred to the cooling zone. Forced inert gas cooling or natural cooling can be used during cooling. After cooling to room temperature, the dust accumulation silos are opened for collection, and the material silos 3 are transferred. By using at least two sets of dust accumulation furnaces 2 and material silos 3 for cyclical production, the continuous reaction in the main reactor 1 is not affected. When the reacted raw material in the main reactor 1 is less than a set first threshold, the power of the main reactor 1 is first reduced, material is added to the main reactor 1, and then the main reactor 1 is heated to the production temperature to improve production efficiency.

[0055] The dust accumulation furnace 2, which collects dust on raw materials, and the material carrier and scraper mechanism inside the furnace are existing technologies, are therefore omitted in the attached drawings.

[0056] In this embodiment, at least two sets of dust accumulation furnaces 2 and material bins 3 first evacuate the cavity to about 1000Pa before collecting materials.

[0057] The process of feeding materials into the main reactor 1 includes:

[0058] Slowly extend the conveying pipe 42 of the feeding bin 41 into the material container 11 of the main reactor 1;

[0059] Collect the pressure in the feeding hopper 41 and the main reactor 1. After the pressure is balanced, open the solenoid valve 51 of the feeding hopper 41.

[0060] Adjust the feeder frequency to control the feeding speed;

[0061] Once the material reaches the set value, close the solenoid valve 51 and then retract the conveying pipe 42.

[0062] The feeding port of the feeding bin 41 is installed at the feeding port of the main reactor 1 and mechanically vacuum sealed. The conveying pipe 42 is made of high-temperature resistant material and can extend and retract. Since the main reactor 1 is under vacuum during the reaction, in order to prevent pressure differences between the feeding bin 41 and the main reactor 1, the solenoid valve 51 of the feeding bin 41 is opened after the pressure is balanced, so that the raw material is conveyed to the material container 11 in the main reactor 1 through the conveying pipe. When conveying the raw material, the feeding frequency of the feeder needs to be controlled to prevent material splashing and make it fall evenly into the material container 11. After the material reaches a certain amount, the solenoid valve 51 is closed and the conveying pipe 42 is retracted.

[0063] During the feeding and reaction process, the weight of the material container 11 inside the main reactor 1 is collected to determine the amount of material.

[0064] In this embodiment, after the set production reaction cycle is reached, the power of the main reactor 1 is slowly reduced. When the temperature of the main reactor 1 drops to the set second threshold, the power of the main reactor 1 is turned off, and inert protective gas is filled into the main reactor 1 until the overall temperature inside the furnace drops to room temperature. Then, the cooled dust collection furnace 2 is opened to collect the material.

[0065] The production reaction cycle can be set by determining the total reaction volume and reaction time based on the aging status of the material container 11 in the main reactor 1. When the limit is reached, the power of the main reactor 1 is slowly reduced. When the temperature of the main reactor 1 drops below 800 degrees Celsius, the power of the main reactor 1 is turned off. The inert protective gas is always turned on until the overall temperature inside the furnace drops to room temperature. The cooled dust accumulation furnace 2 is then opened and the silicon oxide product is collected. At this point, the reaction cycle ends.

[0066] like Figure 2 As shown, this embodiment also includes a reactor apparatus for the continuous preparation of lithium battery anode materials, comprising:

[0067] Main reactor 1 is used to react the raw materials and generate materials;

[0068] At least two dust accumulation furnaces 2 and material bins 3 are provided. The dust accumulation furnace 2 is connected to the main reactor 1 and includes a material carrier and a scraper mechanism. The material carrier is used to continuously accumulate dust in the material generated in the main reactor 1, and the scraper mechanism is used to transport the generated material to the material bin 3.

[0069] Feeding mechanism 4 is used to feed materials into the main reactor 1;

[0070] The shut-off mechanism 5 is located between the dust accumulation furnace 2 and the main reactor 1 to control the connection between the main reactor 1 and the dust accumulation furnace 2.

[0071] By connecting at least two sets of dust accumulation furnaces 2 and material silos 3 to the main reactor 1, during production, one or more sets of dust accumulation furnaces 2 and material silos 3 are first turned on to continuously accumulate and collect the material generated in the main reactor 1. When the collection volume reaches saturation, another set of dust accumulation furnaces 2 and material silos 3 is turned on to continuously accumulate and collect the material. Then, the saturated dust accumulation furnaces 2 and material silos 3 are transferred to the cooling zone. Forced inert gas cooling or natural cooling can be used during cooling. After cooling to room temperature, the dust accumulation silos are opened for collection, and the material silos 3 are transferred. By using at least two sets of dust accumulation furnaces 2 and material silos 3 for cyclical production, the continuous reaction in the main reactor 1 is not affected. When the reacted raw material in the main reactor 1 is less than a set first threshold, the power of the main reactor 1 is first reduced, material is added to the main reactor 1, and then the main reactor 1 is heated to the production temperature to improve production efficiency.

[0072] like Figure 4 As shown, in this embodiment, each set of dust accumulation furnace 2 and material silo 3 also includes a vacuum pump 6 and a filter 7. The vacuum pump 6 is connected to the material silo 3 and is used to evacuate the material silo 3 and dust accumulation furnace 2. The filter 7 is located between the vacuum pump 6 and the material silo 3. Since it is necessary to evacuate the dust accumulation furnace 2, the material silo 3, and the main reactor 1 connected to them, a vacuum pump 6 is required. When evacuating, the vacuum pump 6 will transfer the raw materials generated by the reaction from the main reactor 1 to the dust accumulation furnace 2, and the filter 7 will filter the raw materials between the material silo 3 and the vacuum pump 6.

[0073] like Figure 3 As shown, the feeding mechanism 4 includes:

[0074] Feeding bin 41 contains raw materials;

[0075] The conveying pipe 42 is a telescopic structure. When feeding, the conveying pipe 42 extends into the main reactor 1.

[0076] Solenoid valve 51 is located between feeding hopper 41 and conveying pipe 42.

[0077] The feeding port of the feeding bin 41 is installed at the feeding port of the main reactor 1 and mechanically vacuum sealed. The conveying pipe 42 is made of high-temperature resistant material and can extend and retract. Since the main reactor 1 is under vacuum during the reaction, in order to prevent pressure differences between the feeding bin 41 and the main reactor 1, the solenoid valve 51 of the feeding bin 41 is opened after the pressure is balanced, so that the raw material is conveyed to the material container 11 in the main reactor 1 through the conveying pipe. When conveying the raw material, the feeding frequency of the feeder needs to be controlled to prevent material splashing and make it fall evenly into the material container 11. After the material reaches a certain amount, the solenoid valve 51 is closed and the conveying pipe 42 is retracted.

[0078] As a preferred embodiment of the above, the main reactor 1 includes:

[0079] Material container 11, which contains raw materials;

[0080] Heating mechanism 12 is provided at the material container 11 to heat the material container 11;

[0081] The weighing sensor weighs the material container 11 to determine the amount of raw material inside the material container 11.

[0082] like Figure 5 As shown, in each group of dust accumulation furnaces 2 and material bins 3, multiple dust accumulation furnaces 2 are set up, and multiple dust accumulation furnaces 2 are connected to one material bin 3, and a solenoid valve 51 is set between them.

[0083] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for continuously preparing lithium-ion battery anode materials, characterized in that, Includes the following steps: At least two dust collection furnaces and material silos are connected to the main reactor. Feed materials into the main reactor and heat the main reactor to the production temperature; Turn on one set of dust accumulation furnaces and material silos so that the material generated by the main reactor can be continuously accumulated on the material carrier of the dust accumulation furnace, and use a scraper mechanism to transport the material generated by the reaction from the dust accumulation furnace to the material silo. When the collection capacity of this group of dust accumulation furnaces or material silos reaches saturation, another group of dust accumulation furnaces and material silos is opened to collect the material, this group of dust accumulation furnaces and material silos is closed and transferred to the cooling zone. After cooling, the material in the dust accumulation furnaces and material silos is collected. Use at least two sets of dust accumulation furnaces and material silos for cyclical production; When the raw material in the main reactor is lower than the set first threshold, the power of the main reactor is reduced, the main reactor is fed back into the main reactor, and the main reactor is heated to the production temperature until the set production reaction cycle is reached. After the set production reaction cycle is reached, the power of the main reactor is slowly reduced. When the temperature of the main reactor drops to the set second threshold, the power of the main reactor is turned off, and inert protective gas is filled into the main reactor until the overall temperature inside the furnace drops to room temperature. Then, the cooled dust collection furnace is opened to collect the material. The process of feeding materials into the main reactor includes: Slowly extend the feed pipe from the feed hopper into the material container of the main reactor; Collect the pressure in the feeding hopper and the main reactor. After the pressure is balanced, open the solenoid valve of the feeding hopper. Adjust the feeder frequency to control the feeding speed; Once the material reaches the set value, close the solenoid valve and then retract the conveying pipe.

2. The method for continuous preparation of lithium battery anode material according to claim 1, characterized in that, Before collecting materials, at least two sets of dust accumulation furnaces and material silos must first evacuate the cavity.

3. The method for continuous preparation of lithium battery anode material according to claim 1, characterized in that, During the feeding and reaction process, the weight of the material containers inside the main reactor is collected to determine the amount of material.

4. A reactor apparatus for continuous preparation of lithium battery anode materials, characterized in that, A method for the continuous preparation of lithium-ion battery anode materials as described in any one of claims 1 to 3, comprising: The main reactor is used to react the raw materials and generate materials. At least two sets of dust accumulation furnaces and material silos are provided. The dust accumulation furnaces are connected to the main reactor and include a material carrier and a scraper mechanism. The material carrier is used to continuously accumulate dust in the material generated in the main reactor, and the scraper mechanism is used to transport the generated material to the material silos. A feeding mechanism for feeding materials into the main reactor; A shut-off mechanism is provided between the dust accumulation furnace and the main reactor to control the connection between the main reactor and the dust accumulation furnace.

5. The reactor equipment for continuous preparation of lithium battery anode materials according to claim 4, characterized in that, Each set of dust accumulation furnaces and material silos also includes a vacuum pump and a filter. The vacuum pump is connected to the material silo and is used to evacuate the material silo and dust accumulation furnace. The filter is located between the vacuum pump and the material silo.

6. The reactor equipment for continuous preparation of lithium battery anode materials according to claim 4, characterized in that, The feeding mechanism includes: A feeding hopper containing raw materials; The material conveying pipe is a telescopic structure, which extends into the main reactor during material feeding. A solenoid valve is disposed between the feeding hopper and the conveying pipeline.

7. The reactor equipment for continuous preparation of lithium battery anode materials according to claim 4, characterized in that, The main reactor includes: A material container for holding raw materials; A heating mechanism is provided at the material container to heat the material container; A weighing sensor is used to weigh the material container and determine the amount of raw material inside the material container.

8. The reactor equipment for continuous preparation of lithium battery anode materials according to claim 4, characterized in that, In each group of dust accumulation furnaces and material silos, multiple dust accumulation furnaces are provided, and multiple dust accumulation furnaces are connected to one material silo, with solenoid valves provided between them.

Images